JP5064844B2 - Jig for surface layer processing of vehicle wheel - Google Patents

Description

  The present invention relates to a surface layer processing jig used for processing a disk surface layer and repairing a minute casting defect of a vehicle wheel which is a cast product, and a surface for a vehicle wheel in which the surface layer processing jig is incorporated. The present invention relates to a layer processing apparatus and a surface layer processing method.

  In recent years, there has been a strong demand for improvement in fuel efficiency of automobiles, and in addition, since automobiles have been upgraded, light-weight vehicle wheels made of light alloys that are excellent in design are becoming widely used. As this light alloy vehicle wheel, a forged product with low corrosion and high strength is known, but since it is suitable for mass production and has a high material yield, most of them are cast products produced through a casting process. is there.

  However, in a light alloy vehicle wheel that is a cast product, a minute casting defect may occur on the surface of the wheel, which may cause a deterioration in quality in terms of design. The micro casting defects appearing on the surface are roughly classified into pores (pinholes) that appear as holes (pinholes) and blisters that appear as protrusions. Such a minute casting defect is not allowed to appear even in the design surface of the disk even if it is a very small hole or protrusion that is difficult to notice. This is because most people who purchase a vehicle wheel made of light alloy, which is more expensive than iron, attach great importance to the design, including the outer shape and appearance.

  The micro casting defects cannot be repaired or made inconspicuous, for example, by forming a film by painting. Therefore, conventionally, with respect to the design surface of the disk, among the minute casting defects, the hole portion is particularly carefully filled with the putty, and the protrusion portion is carefully corrected using a paper cutter or a lathe. This was a very strict defect repair work. In particular, with a light alloy vehicle wheel with a design that expresses the cast surface as it is on the disk design surface, the appearance of the cast surface on the surface can be slightly changed if the putty is filled. In order to prevent this, a lot of human labor and time have been spent on filling the putty. As a result, we faced the problem of reduced production efficiency.

From this point of view, there seems to be no prior literature that proposes improvement.
JP 2004-322112 A JP 2004-174604 A

  The present invention has been made in view of the above-described circumstances, and the object of the present invention is to perform efficiency without performing putty filling, paper cutting or correction processing with a lathe, or without placing a heavy burden on these operations. It is an object of the present invention to provide a means capable of repairing a minute casting defect generated in a disk of a vehicle wheel.

  As a result of the examination, it may be effective to repair a minute casting defect appearing on a disk of a vehicle wheel by applying a casting hardening method (see Patent Document 1) developed by the present applicant. I came to the idea. This method of hardening the casting is a means that can form a dense layer thicker than the plastic deformation layer by shot peening treatment on the surface side of the casting (casting product) by causing the hardening material to collide with the surface of the casting. According to the means, it is possible to impart desired mechanical properties to the casting.

  However, when we planned to try a casting hardening method on the surface of a disk of a vehicle wheel, the casting hardening method itself was applied to the mass production process of a mass-produced product such as a vehicle wheel. I faced the reality that there was a need for new means that could be implemented efficiently.

  That is, the casting curing method developed by the present applicant is to swing the casting with the curing material in order to cause the curing material to collide with the surface of the casting. It is necessary to replace the vehicle wheel and the hardened material that collides with it with the rocking device. Considering the time required for this operation, from the viewpoint of production efficiency, conventional putty filling and paper removal are required. He faced the problem to be solved that the improvement could not be achieved as compared with the correction work by using a lathe (see Patent Document 1 and Patent Document 2 regarding the swing device).

  Actually, when a method of hardening the casting was tried on the surface of the disk of the vehicle wheel, a hard material was uniformly collided with the surface of a wide plane such as the disk of the vehicle wheel. It turned out to be difficult.

  That is, in the casting curing method developed by the present applicant, the cast product is swung together with the hardened material in order to cause the hardened material to collide with the surface of the cast product, but this swing was a horizontal swing. (Refer to patent document 1 and patent document 2) When performing the hardening method of a casting with respect to the wheel for vehicles, it is necessary to make the wheel for vehicles upright (it shall be in the same state as a driving state). Then, the moment related to this rocking (movement) increases, and in addition, when the vehicle wheel is rocked together with the hardener, the collision position of the hardener against the disk of the vehicle wheel is inevitably caused by gravity. Concentrate on the bottom of the vehicle wheel disc. For this reason, the hardened material cannot be uniformly collided with the design surface of the disk of the vehicle wheel. In addition, as a result of the hardening material concentrating on the lower part of the disk of the vehicle wheel, the hardening materials may collide with each other or may not work (does not move and do not collide with the surface of the cast product). Efficiency. Therefore, in order to repair minute casting defects that may exist on the entire surface of the disk of the vehicle wheel, it is necessary to change the way the vehicle wheel is placed and repeatedly rock it, which is cumbersome and takes a long time. As a result, we faced the problem to be solved that we could not make a big improvement from the conventional putty filling, paper cutting and correction by lathe.

  Incidentally, it has been found that when the conventionally known shot peening treatment is performed, the surface of the disk of the vehicle wheel is rather deteriorated. As a result of research on this phenomenon, the shot peening process is limited to processing only the surface of the vehicle wheel (casting product), and the minute casting defects existing on the surface layer of the vehicle wheel (near the surface of the inside) are eliminated. Since it does not have an effect until it is crushed, when the shot peening process is performed, the holes and protrusions already existing on the surface are deformed, or the holes and protrusions are irregularly shaved, or the surface layer It was inferred that the pores (pinholes) that existed appeared on the surface to form new holes and protrusions, and the surface was rather rough.

  Therefore, further research has been conducted to find a means suitable for a mass production process capable of efficiently repairing a minute casting defect generated on the surface of a disk of a vehicle wheel, and the present invention shown below is completed. It came.

  First, according to the present invention, a jig used for processing a surface layer of a disk in a vehicle wheel having a rim and a disk, the bottom plate portion being a substrate of the jig, on the bottom plate portion A circumferentially disposed edge wall portion, and one protruding shaft disposed on the bottom plate portion at the center of the circumferentially disposed edge wall portion. And a container member having a plurality of sub-projection shaft portions disposed around the projection shaft portion, and a vehicle wheel disposed at the tip of the projection shaft portion of the container member is fixed to the container member. And a workpiece including at least a spherical body or a polyhedron having a specific gravity of 2 or more and a diameter of φ1.5 mm or more and φ20 mm or less, housed in a space surrounded by the bottom plate portion and the edge wall portion of the container member , A surface layer processing jig for a vehicle wheel is provided.

  In this specification, the surface layer means the surface and the surface layer, and the simple term “surface layer” means the vicinity of the surface excluding the surface. Further, the diameter of the polyhedron is the average of the maximum value and the minimum value of the distance connecting the outer surface and the outer surface of the polyhedron through the center of the polyhedron.

  In the vehicle wheel surface layer processing jig according to the present invention, it is preferable to further include a circular top plate member attached to the tip of the protruding shaft portion of the container member.

  In the jig for processing a surface layer of a vehicle wheel according to the present invention, it is preferable that a spherical material or a polyhedron having a diameter of φ1.5 mm or more and φ20 mm or less occupies 5 to 30% by volume of the entire workpiece. . Moreover, the specific gravity of a processed material becomes like this. Preferably it is 2-10, More preferably, it is 5-10.

  The vehicle wheel surface layer processing jig according to the present invention is suitably used when the vehicle wheel is a light alloy casting. In this specification, light alloys refer to aluminum alloys, magnesium alloys, and the like for casting. Examples of aluminum alloys include AC4C, AC4CH, AC4B, AC4D, AC2A, AC2B, and AC3A based on Japanese Industrial Standards (JIS). It can be illustrated.

  In the vehicle wheel surface layer processing jig according to the present invention, the vehicle wheel is a light alloy casting, and the surface layer of the disk to be processed is a cut surface (surface that has been cut after casting). In some cases, it is preferable that a spherical or polyhedron having a diameter of φ5 mm or more and φ20 mm or less occupies 5 to 30% by volume of the entire processed material.

  In the vehicle wheel surface layer processing jig according to the present invention, the vehicle wheel is a light alloy casting, and the surface layer of the disk to be processed is a cast surface (surface not processed after casting). In a certain case, it is preferable that a spherical body or a polyhedron having a diameter of φ1.5 mm or more and φ8 mm or less occupies 5 to 30% by volume of the entire processed material.

  The jig for surface layer processing of a vehicle wheel according to the present invention is a processing material when the vehicle wheel is a cast product made of light alloy and the surface layer of the disk to be processed is a cutting surface and a casting surface. The spherical body or polyhedron having a diameter of φ5 mm or more and φ8 mm or less preferably occupies 5 to 30% by volume of the entire processed material.

  The vehicle wheel surface layer processing jig according to the present invention is preferably a surface layer processing apparatus for a vehicle wheel, which will be described later, in order to process the surface layer of the disk in a vehicle wheel having a rim and a disk. It is a jig that is incorporated and used. As described above, the vehicle wheel surface layer processing jig according to the present invention includes a container member having a bottom plate portion, an edge wall portion, a protruding shaft portion, and a subsidiary protruding shaft portion, a tightening member, and a processing material. The vehicle wheel to be processed is not included in the invention specifying items. However, the vehicle wheel surface layer processing jig according to the present invention is used for processing the surface layer of the vehicle wheel, and the vehicle wheel to be processed is always incorporated in use. Therefore, each component of the surface layer processing jig of the vehicle wheel according to the present invention is specified in shape, size, etc. by the vehicle wheel to be processed, and the function is also the same as that of the vehicle wheel. It becomes clear by the relationship. Therefore, each component of the surface layer processing jig of the vehicle wheel according to the present invention will be described below, including the relationship with the vehicle wheel.

  The jig for processing the surface layer of the vehicle wheel according to the present invention swings in the vertical direction (in the vertical direction) with the vehicle wheel incorporated therein, so that the workpiece is the disk of the vehicle wheel. It is configured to collide with a surface (for example, a design surface). When the workpiece collides with the surface of the disk of the vehicle wheel, the minute casting defects that may exist on the entire surface of the vehicle wheel are repaired and the surface is smoothed, and the minute casting defects existing on the surface layer are crushed and sealed. A treatment is performed (in this specification, this is called a surface layer processing treatment).

  The container member is a member that always contains a processed material. When the vehicle wheel is attached to the container member, the container member is surrounded by the bottom plate portion and the edge wall portion (when the vehicle wheel disk has no through hole). The closed space is closed by the disk of the vehicle wheel, and one closed space is formed in which the workpiece moves.

  The bottom plate portion of the container member serves as the base and substrate of the jig, and forms a space for accommodating the processed material together with the edge wall portion. When the surface layer processing jig is stationary (not swinging), the workpiece is placed on the bottom plate portion surrounded by the edge wall portion. When the vehicle wheel is incorporated into the surface layer processing jig and swung in the vertical direction, the workpiece collides with the bottom plate and the disk of the vehicle wheel (the surface), and reciprocates between them. To do. Therefore, the bottom plate portion may be generally a flat plate, but in order to partially change the direction of rebound when the workpiece collides and the stroke of the reciprocating workpiece, the bottom plate portion is configured with an inclined surface. Also good. The size of the bottom plate portion is preferably at least larger than the size of the rim of the vehicle wheel.

  The edge wall portion of the container member is a portion that receives the rim when the vehicle wheel is incorporated into the surface layer processing jig. Therefore, in order to match the shape of the flange of the rim, the shape is a circumferential shape, which is a frame-like shape. The circumferential edge wall portion preferably has a certain width. This is because it is possible to deal with vehicle wheels having different sizes (rim diameters). Moreover, it is preferable that the edge wall part is comprised by the polyamide-type polymer resin material (for example, MC nylon: brand name) in the part contact | abutted with the vehicle wheel. This is because it is difficult to damage the vehicle wheel, and the vehicle wheel is stabilized on the edge wall when the vehicle wheel is placed. This preferable aspect can be realized by laying a rubber sheet or applying a polymer resin paint on a portion of the edge wall portion that comes into contact with the vehicle wheel.

  The protruding shaft portion of the container member is a portion that communicates with the hub hole when the vehicle wheel is incorporated into the surface layer processing jig. The vehicle wheel is positioned by passing the hub hole of the vehicle wheel through the protruding shaft portion. Accordingly, one protrusion shaft portion is disposed on the bottom plate portion at the center of the edge wall portion. The diameter of the projection shaft is determined according to the hub hole of the vehicle wheel.

  The auxiliary projection shaft portion of the container member is a portion that communicates with the mounting bolt hole when the vehicle wheel is incorporated into the surface layer processing jig. The vehicle wheel is positioned by passing the mounting bolt hole of the vehicle wheel through the auxiliary projection shaft. Therefore, a plurality (usually 4 or 5) are arranged around the protruding shaft portion according to the position and number of the mounting bolt holes of the vehicle wheel. The diameter of the auxiliary projection shaft is determined according to the mounting bolt hole of the vehicle wheel.

  As described above, the tightening member tightens the vehicle wheel, which is positioned by the projection shaft portion and the sub-projection shaft portion and is placed so as to align the rim with the edge wall portion, in order to fix the wheel to the container member. It is a member. The tightening member is constituted by, for example, a bolt, a clamp, or the like. In the case of a bolt, it is preferable to form a screw hole in the projecting shaft portion so that the projecting shaft portion functions as a nut.

  The top plate member is a member that closes the space opposite to the bottom plate portion of the vehicle wheel disk when the vehicle wheel is incorporated in the surface layer processing jig. That is, the role of the top plate member is to form another closed space separately from the one closed space on the side opposite to the bottom plate portion, and the top plate member and the vehicle (the disc has no through hole). The disk and the rim of the working wheel form another closed space above the disk opposite to the bottom plate. Therefore, the top plate member is circular according to the inner shape of the rim, and its size (diameter) is determined according to the inner diameter of the rim.

  If a vehicle wheel without a through hole in the disk is incorporated into a jig for surface layer processing including a top plate member, the processing material is put in the other closed space, and the whole is swung vertically, then the processing material Impinges on both (both) surfaces of the vehicle wheel disc on both sides. That is, the work material originally stored in the container member reciprocates in the one closed space while colliding with the bottom plate portion and the surface (for example, the design surface) of the disk of the vehicle wheel. In addition, if a work material is newly put in the other space before swinging, the work material is used for the top plate member and the surface of the vehicle wheel disk (for example, the mounting surface, the surface on the vehicle body side). ) And reciprocating in the other closed space.

  In the case of a vehicle wheel that does not have a through hole in the disk, the vehicle wheel is mounted on the container member with the direction of the vehicle wheel reversed, and the surface of the disk of the vehicle wheel (mounting surface, surface on the vehicle body side) Instead, a closed space in which the workpiece moves may be formed by being surrounded by the bottom plate portion and the edge wall portion.

  When the vehicle wheel disc is of a spoke type, there is a through hole between the spokes of the disc, and as such, the bottom plate portion and the edge wall portion and the vehicle wheel disc form a single closed space. Similarly, no other closed space is formed by the top plate member and the disk and rim of the vehicle wheel. In this case, one closed space is formed by the bottom plate portion, the edge wall portion, the rim of the vehicle wheel, and the top plate member, and the disk of the vehicle wheel exists in the closed space. In this manner, when the workpiece is swung in the vertical direction, the workpiece collides with the (both) surfaces of the vehicle wheel on both sides of the disc while passing through the through hole of the disc. That is, the work material originally stored in the container member reciprocates between the bottom plate portion and the top plate member while colliding with both surfaces of the disk of the vehicle wheel.

  However, even if the disk of the vehicle wheel is a spoke type, by using a blocking member that blocks the through hole between the spokes of the disk, the bottom plate portion and the edge wall portion and the disk of the vehicle wheel are one closed space. And a closed space can be formed by the top plate member and the disk and rim of the vehicle wheel. In this case, if a work material is put in the one closed space and the other space, the work material collides with both surfaces of the disk of the vehicle wheel, and the one closed space and the other space. Reciprocates in a closed space.

  The processed material is always accommodated in a space surrounded by the bottom plate portion and the edge wall portion of the container member. In the state in which the vehicle wheel is incorporated in the surface layer processing jig of the vehicle wheel according to the present invention, the workpiece collides with the surface of the disk in the vehicle wheel. When the movement is finished, the state naturally returns to the original position by gravity, that is, the state accommodated in the space surrounded by the bottom plate portion and the edge wall portion.

  Next, according to the present invention, a vehicle comprising any one of the vehicle wheel surface layer processing jigs described above and a swinging means for swinging the surface layer processing jigs in the vertical direction. Provided is a surface layer processing apparatus for an industrial wheel. In the present specification, vertical swing means vertical swing.

  In the surface layer processing apparatus for a vehicle wheel according to the present invention, the swinging means includes a prime mover, a rotary shaft connected to the prime mover, a crank provided on the rotary shaft, and the crank and a connecting rod. A rocking mechanism having a rocking plate to be connected and two or more linear motion guides attached to the rocking plate and reciprocating the rocking plate up and down. For surface layer processing that is converted to vertical motion by the crank provided on the rotating shaft, and the rocking plate connected to the crank is reciprocated up and down along the linear motion guide to be fixed to the rocking plate It is preferable to swing the jig in the vertical direction.

  When the surface layer processing apparatus for a vehicle wheel according to the present invention is provided with a swing mechanism, another crank may be provided on the rotating shaft, and a counterweight may be attached to the crank. preferable.

  When the surface layer processing apparatus for a vehicle wheel according to the present invention includes a swing mechanism, the swing mechanism is placed on the floor, and an air spring is provided between the swing mechanism and the floor. It is preferable that

  When the surface layer processing apparatus for a vehicle wheel according to the present invention includes a swing mechanism and an air spring, vibration suppression weights are provided on both sides of the swing mechanism and directly above the air spring. It is preferable.

  In the surface layer processing apparatus for a vehicle wheel according to the present invention, it is preferable that the frequency required for rocking is 3 Hz or more and 30 Hz or less.

  In the surface layer processing apparatus for a vehicle wheel according to the present invention, it is preferable that the rocking time for rocking is 10 seconds or more and 3 minutes or less.

  Next, according to the present invention, a closed space is formed on the surface of the vehicle wheel, and a work material including at least a spherical body or a polyhedron having a specific gravity of 2 or more and a diameter of φ1.5 mm or more and φ20 mm or less is input into the closed space. And a vehicle wheel surface layer processing method in which a vehicle wheel having a closed space formed with the processed material is formed on the surface of the vehicle wheel so that the processed material collides with the surface of the vehicle wheel. Is provided.

In the vehicle wheel surface layer processing method according to the present invention, the closed space includes a plane including the plane of the rocking container having a plane and the surface of the vehicle wheel. (2) It is preferable to form in any aspect.
(1) The vehicle wheel is accommodated in a rocking container having a flat surface so that a closed space is formed by a plane including the flat surface of the rocking container and the surface of the vehicle wheel.
(2) By fixing an oscillating container having a flat surface on the surface of the vehicle wheel, a closed space is formed by a plane including the plane of the oscillating container and the surface of the vehicle wheel.

  In the method for processing a surface layer of a vehicle wheel according to the present invention, the processed material is a spherical body or polyhedron having a diameter of φ1.5 mm to φ20 mm occupying 5 to 30% by volume or more of the entire processed material. Is preferred.

  The surface layer processing method for a vehicle wheel according to the present invention is suitably used when the vehicle wheel is a light alloy casting.

  In the method for processing a surface layer of a vehicle wheel according to the present invention, when the vehicle wheel is a light alloy casting, and the surface of the vehicle wheel to be processed is a cutting surface, the workpiece has a diameter of 5 mm. The spherical body or polyhedron having a diameter of 20 mm or less preferably occupies 5 to 30% by volume of the entire processed material.

  In the method for processing a surface layer of a vehicle wheel according to the present invention, when the vehicle wheel is a light alloy casting, and the surface of the vehicle wheel to be processed is a cast surface, the workpiece has a diameter. It is preferable that a spherical body or a polyhedron having a diameter of 1.5 mm or more and 8 mm or less occupies 5 to 30% by volume of the entire workpiece.

  In the vehicle wheel surface layer processing method according to the present invention, when the vehicle wheel is a light alloy casting, and the surface of the vehicle wheel to be processed is a cut surface and a cast surface, the workpiece is The spherical body or polyhedron having a diameter of φ5 mm or more and φ8 mm or less preferably occupies 5 to 30% by volume of the entire processed material.

  In the method for processing a surface layer of a vehicle wheel according to the present invention, it is preferable that the processed material includes at least a metal material or a ceramic material.

  In the vehicle wheel surface layer processing method according to the present invention, it is preferable that the processed material includes at least a steel ball or a zirconia ball.

  In the method for processing a surface layer of a vehicle wheel according to the present invention, it is preferable that the frequency required for rocking is 3 Hz or more and 30 Hz or less.

  In the surface layer processing method for a vehicle wheel according to the present invention, it is preferable that the rocking time for rocking is 10 seconds or more and 3 minutes or less.

  Next, according to the present invention, a method for manufacturing a vehicle wheel having a casting process, a heat treatment process, and a cold working process or a hot working process using any one of the above-described vehicle wheel surface layer processing methods. Is provided.

  The vehicle wheel surface layer processing jig according to the present invention includes an edge wall portion arranged circumferentially in accordance with a flange shape of a rim of the vehicle wheel, and an edge wall in accordance with a hub hole of the vehicle wheel. A container member having a protrusion shaft portion disposed at the center of the portion, a sub-projection shaft portion disposed around the protrusion shaft portion in accordance with a mounting bolt hole of the vehicle wheel, and the protrusion shaft portion of the container member A fastening member for fixing the vehicle wheel to the container member, and a work material accommodated in a space surrounded by the bottom plate part and the edge wall part of the container member, In a preferred aspect, since the circular top plate member attached to the tip of the protruding shaft portion of the container member is provided, the vehicle wheel is used for performing the surface layer processing by causing the workpiece to collide with the surface of the vehicle wheel. It is easy to replace the workpiece and the workpiece is loaded. Place is not required. For this reason, the surface layer processing can be performed efficiently, and the surface layer processing can be performed in a mass production process of a mass-produced product such as a vehicle wheel.

  When the surface layer processing jig for the vehicle wheel according to the present invention does not exist, each time the surface layer processing is performed, the vehicle wheel is attached to the swinging device together with the processing material, and the processing is performed. It will be necessary to remove it when finished, and this will take a lot of time. From the viewpoint of production efficiency, it is difficult to perform surface layer processing in the mass production process of mass-produced products such as vehicle wheels. there were. If the jig for surface layer processing of a vehicle wheel according to the present invention is used, it is possible to greatly reduce the burden and time required for the replacement of the vehicle wheel and work material, and surface layer processing for mass production processes. Processing can be applied.

  For example, if the surface layer processing jig of the vehicle wheel according to the present invention is installed in advance in an apparatus that swings up and down, the tightening member is loosened in the surface layer processing jig for the vehicle. Surface layer processing can be performed immediately by simply attaching the wheel to the container member and fastening the fastening member to fix the vehicle wheel. By simply operating the tightening member, it is possible to attach the vehicle wheel to the device that swings up and down easily and quickly, and to remove the vehicle wheel from the device that swings up and down. Since the vehicle wheel is positioned by the projection shaft portion and the sub projection shaft portion, fine adjustment of the position is not necessary when the vehicle wheel is attached to the container member. Since the work material is always accommodated in a space surrounded by the bottom plate portion and the edge wall portion of the container member and becomes a closed space when the vehicle wheel is attached, the surface of the work material on the new vehicle wheel When performing layer processing, there is no need to replace the processing material.

  In addition, when the vehicle wheel is attached to the vehicle wheel surface layer processing jig according to the present invention, a closed space is created in which the workpiece reciprocates so that the workpiece collides with the surface of the vehicle wheel disk. However, the processed material is always accommodated there. Therefore, the surface layer processing can be performed immediately after the vehicle wheel is attached to the surface layer processing jig of the vehicle wheel according to the present invention. Therefore, the throughput in applying the surface layer processing to the vehicle wheel is very high.

  In the preferred embodiment of the vehicle wheel surface layer processing jig according to the present invention, the vehicle wheel is a light alloy casting, and the surface layer of the disk to be processed is a cast surface. The processed material has a specific gravity of 2 or more, and a spherical body or polyhedron having a diameter of φ1.5 mm to φ8 mm occupies 5 to 30% by volume of the entire processed material. The range of the size of these processed materials is a hardened material (metal ball (steel ball or stainless steel ball having a diameter of 10 to 20 mm) or cut wire) in a casting hardening method (see Patent Document 1) developed by the present applicant. Does not match. The reason is that in the preferred embodiment of the vehicle wheel surface layer processing jig according to the present invention, the design surface of the disk of the vehicle wheel is considered as the object to be processed, and the surface like the casting surface is retained after processing. This is because it places importance on what is done. That is, the surface layer processing jig for a vehicle wheel according to the present invention is such that the surface of the processed vehicle wheel is almost the same as the cast surface after casting, and the cast surface feeling is not visually changed. We have found the optimum material for processing and proposed it.

  As the processed material, a spherical body or polyhedron having a diameter of φ1.5 mm or more and φ8 mm or less occupies 5 to 30% by volume of the entire processed material, and thus the surface layer processing was performed by this processed material. The surface of the vehicle wheel is almost the same as the cast surface after casting, and the feeling of the cast surface does not change visually. Therefore, for example, it is possible to cope with a vehicle wheel made of a light alloy having a design that expresses a beautiful cast surface as it is on the design surface.

  The vehicle wheel surface layer processing apparatus according to the present invention includes the vehicle wheel surface layer processing jig according to the present invention, and a swinging means for swinging the surface layer processing jig in the vertical direction. This is a specific means for swinging the vehicle wheel incorporated in the surface layer processing jig (including the processed material) in the vertical direction. The surface layer processing apparatus for vehicle wheels according to the present invention causes the vehicle wheel incorporated in the surface layer processing jig to swing up and down in the up-down direction, and thereby the surface layer of the vehicle wheel according to the present invention described above. The excellent effect is recognized in the place where the effect of the processing jig is derived.

  When the vehicle wheel is incorporated into the surface layer processing jig of the vehicle wheel according to the present invention included in the vehicle wheel surface layer processing apparatus according to the present invention, the disk has no through hole. For the wheel, two closed spaces are formed on both sides of the disc of the vehicle wheel, and for the vehicle wheel having a through hole in the disc, communication is made on both sides of the disc of the vehicle wheel. One closed space is formed. Then, when the vehicle wheel incorporated in the surface layer processing jig is swung in the vertical direction by the swinging means, the specific gravity is 2 or more and the diameter is φ1. A workpiece including at least a spherical body or a polyhedron having a diameter of 5 mm or more and φ20 mm or less collides uniformly with the surface of the vehicle wheel. Since the rocking direction is the same vertical direction as the direction of gravity, even if the surface of the vehicle wheel that is the target of collision of the workpiece is a wide plane, the workpiece is uniformly collided with the surface. It is easy to repair the casting defects that can exist on the entire surface of the vehicle wheel easily and efficiently, smooth the surface, and crush and seal the casting defects on the surface layer. Can be done. Not only are the pores (pinholes) appearing on the surface repaired, but the surface of the vehicle wheel is also smoother with the pores present on the surface layer. It eliminates the need to put in a lot of nerves using conventional padding and correction by paper or lathe, or at least does not require a heavy burden on these operations, reducing the labor and time required for them. This can greatly improve the productivity of vehicle wheels.

  According to the surface layer processing apparatus for a vehicle wheel according to the present invention that swings in the vertical direction, the workpiece with respect to the surface of the vehicle wheel as in the case of swinging the vehicle wheel together with the workpiece in the horizontal direction. Since the collision position does not concentrate at the bottom, there is no need to change the placement of the light alloy casting and repeatedly swing it in order to repair minute casting defects existing on the surface of the vehicle wheel. It is. Therefore, it is possible to completely repair a minute casting defect that may exist on the entire surface of the vehicle wheel without requiring labor in a short time.

  According to the preferred embodiment of the surface layer processing apparatus for a vehicle wheel according to the present invention, the swinging means has a counterweight attached to one of the two cranks that is not connected to the swinging plate via the connecting rod. Plays the role of a balancer and counteracts bad vibrations, improving the working environment and reducing the environmental impact of the factory. In addition, since the burden on the vehicle wheel incorporated in the surface layer processing jig that is the rocking body is reduced, the effect of the surface layer processing on the vehicle wheel can be reliably expected. Furthermore, since the burden on the device itself is reduced, the frequency of maintenance of the device is reduced.

  The vehicle wheel surface layer processing apparatus according to the present invention includes an air spring between the swinging mechanism and the floor on which the swinging mechanism is mounted according to a preferred aspect thereof. Since vibration suppression weights are provided on both sides and directly above the air spring, the ratio between the number of excitation forces per second and the natural frequency of the system is increased, and vibration can be prevented. It is also possible to correct the uneven load of the swing mechanism and average the load. Therefore, it is possible to suppress the influence of bad vibrations on the rocking body including the vehicle wheel that is the workpiece and the apparatus itself.

  In a preferred embodiment of the surface layer processing apparatus for a vehicle wheel according to the present invention, the frequency required for rocking (in the vertical direction) is 3 Hz to 30 Hz, and the rocking time for rocking is 10 seconds or more 3 Is less than a minute. These ranges are the frequency (5 to 20 Hz) for swinging and the swinging time (3 to 120 minutes) for swinging in the casting hardening method developed by the present applicant (see Patent Document 1). Does not match. The reason for this is that the casting hardening method developed by the present applicant performs horizontal swinging, whereas in the surface layer processing apparatus for vehicle wheels according to the present invention, the surface of the disk of the vehicle wheel ( This is because the rocking is performed in the vertical direction so that it can be processed with respect to a wide plane (not a hollow portion). That is, the optimal swing condition is different between the horizontal swing and the vertical swing, and the surface layer processing apparatus for a vehicle wheel according to the present invention has the optimal swing by the vertical swing. We have found and proposed dynamic conditions.

  The method for processing a surface layer of a vehicle wheel according to the present invention includes a processing material including at least a spherical body or a polyhedron having a specific gravity of 2 or more and a diameter of φ1.5 mm or more and φ20 mm or less in a closed space formed on the surface of the vehicle wheel. The vehicle wheel is swung in the vertical direction (vertical direction) to cause the workpiece to collide with the surface of the vehicle wheel, so that the surface of the vehicle wheel that is the target of collision with the workpiece is wide. Even in this case, it is possible to cause the workpiece to collide uniformly on the surface. Therefore, it is possible to easily and efficiently repair minute casting defects that can exist on the entire surface of the vehicle wheel while maintaining a surface like a casting surface, smooth the surface, and exist on the surface layer. It is possible to perform the sealing process by crushing the minute casting defects.

  For example, not only can the pores (pinholes) that appeared on the surface be repaired, but the pores that existed on the surface layer can also be crushed, so that they do not cause the generation of new holes and protrusions. The surface of the vehicle wheel becomes smooth. There is no need to fill up with a lot of nerves or make corrections with paper or lathes, or at least there is no need to put a heavy burden on these operations, and the labor and time required for them can be reduced. Wheel productivity is improved.

  Unlike the case where the vehicle wheel is swung in the horizontal direction together with the work material, the collision position of the work material against the surface of the vehicle wheel does not concentrate in the lower part, so the minute casting existing on the surface of the vehicle wheel. In order to repair the defect, there is no need to change the placement of the light alloy casting and repeatedly swing it. Therefore, according to the surface layer processing method for a vehicle wheel according to the present invention, it is possible to completely repair a minute casting defect that may exist on the entire surface of the vehicle wheel without requiring labor in a short time. is there.

  The method for processing a surface layer of a vehicle wheel according to the present invention causes the workpiece to collide uniformly against the design surface of the disk portion of the vehicle wheel by a single swing without changing the way the vehicle wheel is placed. It is possible to repair a minute casting defect on the entire design surface of the disk part of the vehicle wheel. Therefore, the production efficiency of the vehicle wheel is greatly improved.

  In the vehicle wheel surface layer processing method according to the present invention, the surface of the vehicle wheel after processing by this method is almost the same as the cast surface after casting, and the cast surface feeling is not visually changed. . Therefore, for example, it is possible to cope with a vehicle wheel made of a light alloy having a design that expresses a beautiful cast surface as it is on the design surface.

  In the present specification, the smooth or smooth surface of the vehicle wheel does not mean a flat surface, but a smooth and smooth surface such as a casting surface having no defects. It means that the surface has various irregularities.

  In a preferred mode of the method for processing a surface layer of a vehicle wheel according to the present invention, the frequency of rocking is 3 Hz to 30 Hz, and the rocking time of rocking is 10 seconds to 3 minutes. These ranges are the frequency (5 to 20 Hz) for swinging and the swinging time (3 to 120 minutes) for swinging in the casting hardening method developed by the present applicant (see Patent Document 1). Does not match. The reason for this is that the casting hardening method developed by the applicant of the present invention swings in the horizontal direction, whereas the vehicle wheel surface layer processing method according to the present invention is similar to the design surface of the disk portion of the vehicle wheel. This is because the rocking is performed in the vertical direction (vertical direction) so that it can be processed on a wide plane (not a hollow portion). That is, the optimal swing condition is different between the horizontal swing and the vertical (vertical) swing, and the vehicle wheel surface layer processing method according to the present invention has the vertical swing. We have found the optimal rocking condition by and proposed this.

  In a preferred embodiment of the method for processing a surface layer of a vehicle wheel according to the present invention, when the vehicle wheel is a light alloy casting, and the surface layer of the disk to be processed is a cast surface, the processing is performed. The material has a specific gravity of 2 or more and a spherical body or polyhedron having a diameter of φ1.5 mm or more and φ8 mm or less occupies 5 to 30% by volume of the entire processed material, and includes at least a metal material or a ceramic material (at least Steel balls or zirconia balls). The range of the size of the processed material and the material of the processed material are as follows. ) Or cut wire). The reason is that in the preferred embodiment of the surface layer processing method for a vehicle wheel according to the present invention, the design surface of the disk part of the vehicle wheel is considered as one of the objects to be processed, and the surface like a cast skin after processing This is because it is important to maintain. In other words, the surface layer processing method for a vehicle wheel according to the present invention is optimal for the surface of the vehicle wheel after processing to be almost the same as the cast surface after casting, and the cast surface feeling is not visually changed. We have found a new processed material and have proposed it.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate, but the present invention should not be construed as being limited thereto. Various changes, modifications, improvements, and substitutions can be added based on the knowledge of those skilled in the art without departing from the scope of the present invention. For example, the drawings show preferred embodiments of the present invention, but the present invention is not limited by the modes shown in the drawings or the information shown in the drawings. In practicing or verifying the present invention, the same means as described in this specification or equivalent means can be applied, but preferred means are those described below.

  First, a surface layer processing jig for a vehicle wheel according to the present invention and a surface layer processing performed using the jig will be described. 1, 2A, and 2B are views showing an embodiment of a surface layer processing jig for a vehicle wheel according to the present invention. 1 is a perspective view showing only a container member of the surface layer processing jig, FIG. 2A is a plan view including a top plate member, and FIG. 2B is a diagram showing a DD cross section in FIG. 2A. It is sectional drawing which shows a mode that it is and is incorporating the wheel for vehicles. FIG. 6 is a partial cross-sectional view showing a state in which the surface layer processing is performed with the vehicle wheel incorporated in the surface layer processing jig of the vehicle wheel according to the present invention. FIG. 7 is a cross-sectional view showing a part of a surface and a surface layer of a vehicle wheel after casting, and shows a state in which a minute casting defect exists. FIG. 8 is a partial cross-sectional view showing a state in which the surface layer processing is performed on the vehicle wheel, and is a diagram for explaining the operation of the surface layer processing. 7 and 8, the surface 94a of the disk 94 of the vehicle wheel 22 is drawn upside down from FIG. FIGS. 9 and 10 are diagrams illustrating an example of a vehicle wheel that is a target for surface layer processing and is incorporated in a surface layer processing jig of a vehicle wheel according to the present invention. 9 is a perspective view of a vehicle wheel, and FIG. 10 is a cross-sectional view showing a CC cross section in FIG. The vehicle wheel 22 shown in FIGS. 9 and 10 includes a rim (an inner rim 92 and an outer rim 93) and a spoke-type disk 94. A hub hole 95 and a mounting bolt are formed on the surface of the disk 94. The hole 96 is formed, and is a cast product made of (for example) AC4CH aluminum alloy.

  The surface layer processing jig 1 shown in FIGS. 1, 2 </ b> A, and 2 </ b> B includes a container member 61, a fastening member 71, a processing material 25, and a top plate member 81. The container member 61 includes a bottom plate portion 62, an edge wall portion 63 disposed on the bottom plate portion 62 in a circumferential shape in accordance with the outer rim 93 of the vehicle wheel 22, and a circumferential edge wall thereof. The projection shaft portion 64 disposed at the center of the portion 63 and five sub-projection shaft portions 65 disposed around the projection shaft portion 64. The protrusion shaft portion 64 is a portion that communicates with the hub hole 95 when the vehicle wheel 22 is incorporated into the surface layer processing jig 1. Similarly, the auxiliary protrusion shaft portion 65 is a portion that communicates with the mounting bolt hole 96. . In the surface layer processing jig 1, the hub hole 95 of the vehicle wheel 22 is passed through the protruding shaft portion 64, the mounting bolt hole 96 is passed through the auxiliary protruding shaft portion 65, and the outer rim 93 is received by the edge wall portion 63. The vehicle wheel 22 is positioned.

  The bottom plate portion 62 is a flat plate provided with connection portions 67a, 67b, 67c, 67d for installing the surface layer processing jig 1 in a surface layer processing apparatus to be described later. The bottom plate portion 62 forms a space for accommodating the workpiece 25 together with the edge wall portion 63. When the surface layer processing jig 1 is stationary, the bottom plate portion 62 is surrounded by the edge wall portion 63. A workpiece 25 is placed on the top (see FIG. 2B).

  The edge wall portion 63 has a certain width W (see FIG. 1), and a polymer resin layer is formed on the surface that contacts the outer rim 93. As shown in FIG. 1, the edge wall portion 63 may be a flat edge wall portion 63 a that contacts the outer rim 93, or may be an inclined surface. FIG. 2B shows the surface layer processing jig 1 in which only the edge wall portion is replaced. If the surface that contacts the outer rim 93 is an inclined wall 63b as shown in FIG. 2B, the vehicle wheel 22 can be positioned more easily than the flat edge wall 63a.

  The fastening member 71 for fixing the vehicle wheel 22 to the container member 61 is a bolt, which is disposed at the tip of the protruding shaft portion 64 and screwed into a screw hole 66 formed in the protruding shaft portion 64, thereby The wheel 22 can be fastened and fixed. The surface layer processing jig 1 includes a circular top plate member 81, and a hole corresponding to the hub hole 95 through which the protruding shaft portion 64 passes is attached at the center of the top plate member 81. A hole corresponding to the bolt hole 96 through which the auxiliary projection shaft portion 65 is passed is opened. After the vehicle wheel 22 is attached to the container member 61 by passing the hub hole 95 through the protrusion shaft portion 64 and the mounting bolt hole 96 through the auxiliary protrusion shaft portion 65, the top plate member 81 is subsequently attached to the container member 61. The vehicle wheel 22 and the top plate member 81 can be fixed together by attaching and then screwing the fastening member 71 into the screw hole 66.

  Since the disk of the vehicle wheel 22 is a spoke type, in the state where the vehicle wheel 22 is incorporated in the surface layer processing jig 1, the bottom plate 62, the edge wall 63, and the disk 94 of the vehicle wheel 22, A closed space is not formed only on the bottom plate 62 side of the disk 94 (see FIG. 2B), the bottom plate 62, the edge wall 63, the rim (mainly the outer rim 93) of the vehicle wheel 22, and the top plate member. One closed space 26 is formed in a portion surrounded by 81. The disc 94 is in the closed space 26.

  When the surface layer processing jig 1 incorporating the vehicle wheel 22 is swung in the vertical direction in the above-described manner, the workpiece 25 passes through the disk 94 (part between the spokes) as shown in FIG. However, it reciprocates between the bottom plate portion 62 and the top plate member 81 while colliding with both surfaces 94a, 94b of the disk 94 of the vehicle wheel 22.

  Then, when the workpiece 25 collides with the surface 94a (design surface) and the surface 94b (mounting surface) of the disk 94 of the vehicle wheel 22, there is a minute casting defect that may exist on the surfaces 94a and 94b of the vehicle wheel 22. It is repaired, the surfaces 94a and 94b are smoothed, and the minute casting defects existing on the surface layer of the vehicle wheel 22 are crushed and the sealing process is performed (that is, the surface layer processing process is performed). In general, as shown in FIG. 7, a hole portion 12 and a projection portion 13 which are micro casting defects are formed on the (for example) surface 94 a of the disk 94 of the vehicle wheel 22 which is a cast product formed by a casting method. Further, in the vicinity of the surface 94a including the surface layer portion 14, there are many pores 11 that can be holes 12 by appearing on the surface 94a (the same applies to the surface 94b). . When the workpiece 25 is caused to collide with the surface 94a of the vehicle wheel 22 against the (for example) surface 94a of the disk 94 of the vehicle wheel 22 in which micro casting defects are present in this way, FIG. 8 shows. As described above, the holes 12 and the protrusions 13 existing on the surface 94a are smoothly repaired, and the pores 11 existing on the surface layer portion 14 (excluding the surface 94a) from the surface 94a to a depth of about 3 mm are crushed. (The same applies to the surface 94b). When the pores 11 existing in the surface layer portion 14 are crushed, the cause of the generation of new hole portions 12 and protrusions 13 is removed.

  In the vehicle wheel surface layer processing jig according to the present invention, the work material 25 to be used includes at least a spherical body or a polyhedron having a specific gravity of 2 or more and a diameter of φ1.5 mm to φ20 mm. When the diameter is less than φ1.5 mm, the effect of repairing minute casting defects existing on the surfaces 94a and 94b and making the surfaces 94a and 94b smooth is reduced. Moreover, the effect | action which seals the micro casting defect which exists in the vicinity of the surfaces 94a and 94b becomes small, and the range of the surface layer part 14 where the pore 11 is crushed becomes narrow.

  The processed material 25 can be mixed with cut wires, metal grains, abrasives or abrasives, dry sand, etc., and the processed material 25 can be used as a mixture of two or more. It is also preferable that the spherical body or polyhedron included in the processed material 25 have different diameters (sizes). By mixing different sizes of the workpiece 25 in the workpiece 25, the workpiece 25 repeatedly collides and rubs against the surfaces 94a, 94b of the vehicle wheel 22 without leaking more uniformly and is pressurized and applied to the vehicle. This is because it is considered that the smoothness of the surfaces 94a and 94b of the wheel 22 can be improved.

  As the processed material 25, for example, a material including a metal sphere or a ceramic sphere is preferably employed. Metal spheres or ceramic spheres may be used alone or in combination. Examples of the metal sphere include a steel sphere and a stainless sphere, and examples of the ceramic sphere include a zirconia sphere and an alumina sphere. From the viewpoint of specific gravity and hardness, a more preferable metal sphere is a steel ball, and a more preferable ceramic sphere is a zirconia sphere. When the cut wire which can be mixed is illustrated as a processed material, the cut wire made from stainless steel of (phi) 0.6-1.2mmx length 0.6-1.2mm can be mentioned.

  The input amount of the work material 25 is preferably about 5% or more and 30% or less in volume ratio with respect to the volume of the closed space 26. This is to ensure that the workpiece 25 moves freely in the closed space 26 and the number of collisions between the workpiece 25 and the surfaces 94a and 94b of the vehicle wheel 22 is ensured. If the volume is less than 5% by volume, the workpiece 25 moves freely in the closed space 26. As a result of the amount of the workpiece 25 being too small relative to the area of the surface 94a, 94b of the vehicle wheel 22, the workpiece 25 and the vehicle wheel 22 are reduced. The number of collisions with the surfaces 94a and 94b and the applied pressure are not ensured, and the smoothing and sealing of the vehicle wheel 22 may not be performed satisfactorily. When the volume exceeds 30% by volume, the range in which the workpiece 25 freely moves in the closed space 26 is limited, and the number of collisions and the applied pressure between the workpiece 25 and the surfaces 94a and 94b of the vehicle wheel 22 are not secured. Similarly, there is a possibility that the smoothing process and the sealing process of the vehicle wheel 22 may not be performed favorably, which is not preferable.

  The work material 25 is originally accommodated in a space surrounded by the bottom plate portion 62 and the edge wall portion 63, and when swinging in the vertical direction, the work material 25 is applied to the surfaces 94a and 94b of the disk 94 of the vehicle wheel 22. Although it collides, when it finishes swinging, it naturally returns to its original position by gravity, that is, the state accommodated in the space surrounded by the bottom plate portion 62 and the edge wall portion 63.

  Next, the surface layer processing apparatus for vehicle wheels according to the present invention will be described. A surface layer processing apparatus for a vehicle wheel according to the present invention includes the above-described surface layer processing jig 1 and swing means for swinging the surface layer processing tool in the vertical direction. It is an apparatus for performing surface layer processing. FIG. 3 is a top view showing an embodiment of a surface layer processing apparatus for a vehicle wheel according to the present invention. FIG. 4 is a view (front view) in the direction of arrow A in FIG. 3, and only in FIG. 4, the oscillating body 23 is drawn through the inside. The oscillating body 23 is provided on the surface layer processing jig 1 (see FIGS. 2A and 2B) including a container member 61 in which the workpiece 25 is accommodated, a fastening member 71, and a top plate member 81. The vehicle wheel 22 which is a target of the surface layer processing is incorporated. FIG. 4 shows a state in which the surface layer processing jig 1 is fixed on the swing plate 42 and the vehicle wheel 22 is incorporated in the surface layer processing jig 1. FIG. 5 is a view (right side view) as viewed in the direction of arrow B in FIG. 3, and shows a swing mechanism (described later) except for the vibration suppression weight 24. With such a surface layer processing apparatus 2, the vehicle wheel 22 (swinged body 23) incorporated in the surface layer processing jig 1 can be swung in the vertical direction.

  In the surface layer processing apparatus 2 shown in FIGS. 3 to 5, the power for swinging is given by the prime mover 36. The rotational motion generated by the prime mover 36 is transmitted to the rotating shaft 40 by the belt 35 which is a conductive member, and is rotated. The rotating motion of the rotating shaft 40 is converted into a reciprocating motion by a crank 38 provided therein. The swing plate 42 connected to the crank 38 via the connecting rod 41 is linearly reciprocated in the vertical direction along four linear bearings 43a, 43b, 43c, 43d provided as linear motion guides. The oscillating body 23 fixed on the oscillating plate 42 oscillates in the vertical direction by the reciprocating motion of the oscillating plate 42. The counterweight 32 is attached to the other crank 39 provided in the rotating shaft 40, and counteracts and suppresses the bad vibration generated by the reciprocating motion of the rocking plate 42 and the rocking of the rocked body 23.

  In the surface layer processing apparatus 2, the swinging means includes a prime mover 36, a rotating shaft 40 (cranks 38, 39), a connecting rod 41, a swing plate 42, linear bearings 43a, 43b, 43c, 43d (linear motion guides), and A rocking mechanism having a counterweight 32 is provided, and the rocking mechanism is placed on a base 53 via a base plate 33. That is, the swing mechanism is placed together on the base plate 33, and the base plate 33 is placed on the base 53. Under the base 53, four air springs 31 are provided for vibration isolation, and above the base 53, two vibration suppression weights 24 are provided directly above the air spring 31. In the surface layer processing apparatus 2, one vibration suppressing weight 24 is provided corresponding to the two air springs 31.

  Two bearings 45 are attached to the base plate 33, and the rotary shaft 40 is rotatably attached in parallel to the base plate 33 by the two bearings 45. The rotating shaft 40 is connected to the prime mover 36 (rotating shaft thereof) via the belt 35. Specifically, a pulley 37 provided on the prime mover 36 (rotary shaft thereof) and a pulley 34 provided on the rotational shaft 40 are connected by a belt 35, and the rotational motion generated by the prime mover 36 is converted into the rotational shaft. 40. Along with the rotation control of the prime mover 36 by the inverter, the rotation speed of the rotary shaft 40 can be controlled by changing the diameters of the pulleys 34 and 37. By controlling the number of rotations, the number of oscillations (frequency) applied to the reciprocating motion of the oscillation plate 42 (that is, oscillation of the oscillating body) can be controlled.

  The swing plate 42 to which the surface layer processing jig 1 is fixed is configured as a flat plate that is easy to use and excellent in applicability, and is movably attached to the four linear bearings 43a, 43b, 43c, and 43d. ing. The linear bearing is one of linear motion guides, and is a bearing using, for example, balls or rollers for guiding a swing plate that performs reciprocal motion.

  The rotating shaft 40 is provided with two cranks 38, 39 facing in opposite directions by 180 °. The crank 38 is connected to the swing plate 42 via a connecting rod 41, while the counter weight 32 is attached to the crank 39. According to such an aspect of the cranks 38 and 39, the rotational motion given by the prime mover 36 is converted into a reciprocating motion in the vertical direction of the swing plate 42 connected to the crank 38 and fixed to the swing plate 42. The surface layer processing jig 1 (oscillator 23) incorporating the vehicle wheel 22 swings in the vertical direction while suppressing adverse vibrations. As a result, the workpiece 25 collides uniformly with the surface 94a, 94b of the vehicle wheel 22 without being affected by gravity and without being biased, and is smoothed on the surface 94a, 94b of the vehicle wheel 22. Processing and sealing treatment are performed.

  Next, rocking conditions will be described. The vehicle wheel according to the present invention having the vehicle wheel surface layer processing jig according to the present invention is used, and the vehicle wheel is preferably subjected to surface layer processing treatment. The dynamic conditions are as follows.

  It is preferable that the frequency in the vertical swing is approximately 3 Hz to 30 Hz. A more preferable frequency is 5 Hz to 20 Hz, and a particularly preferable frequency is 8 Hz to 15 Hz. This is because the number of collisions per unit time between the workpiece 25 and the surfaces 94a, 94b of the vehicle wheel 22 is ensured. If the vibration frequency is less than 3 Hz, the number of collisions between the workpiece 25 and the surfaces 94a and 94b of the vehicle wheel 22 cannot be secured, and micro casting defects on the surfaces 94a and 94b of the vehicle wheel 22 cannot be repaired. It is not preferable because the minute casting defects in the vicinity (surface layer) of 94a and 94b are not crushed. Further, although depending on the number of workpieces 25, even if the frequency is higher than 30 Hz, the effect of repairing or crushing a minute casting defect is small, and the energy-related effect spent for increasing the frequency is reduced, which is not preferable. . In the present specification, the frequency refers to the number of oscillations repeated per hour, and the unit is Hertz (Hz).

  In addition, the swing width when swinging in the vertical direction is preferably approximately 10 mm to 120 mm. A more preferable swing width is 20 mm or more and 100 mm or less, and a particularly preferable swing width is 30 mm or more and 80 mm or less. This is to ensure the number of collisions per unit time between the workpiece 25 and the surfaces 94a, 94b of the vehicle wheel 22 by appropriately setting the movement range of the workpiece 25 in the closed space 26. If the swaying width is less than 10 mm, the number of collisions between the workpiece 25 and the surfaces 94a and 94b of the vehicle wheel 22 is not ensured, and the minute casting defects of the vehicle wheel 22 cannot be repaired or crushed, which is not preferable. Further, even if the swaying width is larger than 120 mm, only the time during which the workpiece 25 is in contact with the bottom plate portion 62 and the top plate member 81 is increased, and the collision between the workpiece 25 and the surfaces 94a and 94b of the vehicle wheel 22 occurs. The number of times does not increase, and the effect of repairing or crushing micro casting defects is not significant. A preferable height of the closed space 26 is 30 to 200 mm.

  Furthermore, the total swing time when swinging in the vertical direction is preferably approximately 10 seconds to 3 minutes. A more preferable swing time is 20 seconds or longer and 2 minutes or shorter, and a particularly preferable swing time is 30 seconds or longer and 90 seconds or shorter. This is to ensure the total number of collisions between the workpiece 25 and the surfaces 94 a and 94 b of the vehicle wheel 22. If the total swing time is less than 10 seconds, the total number of collisions between the workpiece 25 and the surfaces 94a and 94b of the vehicle wheel 22 is not secured, and the minute casting defects of the vehicle wheel 22 cannot be repaired or crushed. Absent. Further, even if the total oscillation time is longer than 3 minutes, the effect of repairing or crushing the minute casting defect is small, and the time effect is not improved.

  The surface layer processing jig 1 and the surface layer processing apparatus 2 described above are used as one embodiment, and the vehicle wheel surface layer processing jig according to the present invention and the vehicle wheel surface layer including the same. The processing apparatus can be manufactured by processing a steel plate and combining with commercially available members. In production, the size, material, and mechanical strength (for example, the diameter and material of the rotating shaft) of each component are determined appropriately according to the swing conditions and the specifications of the vehicle wheel to be processed. It is preferable.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail using an Example, this invention is not limited to these Examples.

  (Example 1) (1) AC4CH (Japanese Industrial Standard) light alloy was adopted as a casting material and molded by a casting method using a low-pressure casting apparatus to obtain 20 vehicle wheels. And after giving the heat processing which consists of a solution treatment and an aging treatment with respect to the obtained vehicle wheel, rough cutting was performed using the lathe and the casting burr | flash etc. were removed.

  (2) Next, the vehicle wheel surface layer processing method according to the present invention was performed at room temperature using the surface layer processing apparatus shown in FIGS. Specifically, a rocking container is attached to the design surface of the vehicle wheel disc to form a closed space, and a work material is introduced into the closed space, and the vehicle wheel, rocking container, and work material are subjected to vibration. A moving body was constructed. Then, this oscillating body was fixed on the oscillating plate of the surface layer processing apparatus and oscillated, and the workpiece collided with the design surface side of the vehicle wheel. The used processing material is a steel ball having a diameter of 5 mm. The input amount of the work material was 20% in volume ratio with respect to the inner volume of the closed space. The swinging conditions are a frequency of 10 Hz, a swinging width of 60 mm, and a swinging time of 60 seconds.

  (3) Illumination was performed on the design surface of the 20 vehicle wheels that had finished processing the surface layer, and visual inspection was performed to inspect for the presence of micro casting defects. The results are shown in Table 1. FIG. 11 shows a photograph of the design surface of one of the vehicle wheels whose surface layer has been processed.

  (Example 2) When carrying out the surface layer processing method for a vehicle wheel according to the present invention, (1) 20 units in the same manner as in Example 1 except that a steel ball having a diameter of φ8 mm was used as a processed material. The vehicle wheel was manufactured by a casting method and subjected to heat treatment, (2) the surface layer processing method for the vehicle wheel according to the present invention was performed, and (3) the presence or absence of a minute casting defect was inspected. The results are shown in Table 1. FIG. 12 shows a photograph of the design surface of one of the vehicle wheels whose surface layer has been processed.

  (Comparative example 1) Except not performing the surface layer processing method of the vehicle wheel which concerns on this invention, it carries out similarly to Example 1, (1) produced 20 vehicle wheels by a casting method, and heat-processed. (3) The presence or absence of micro casting defects was inspected. The results are shown in Table 1. FIG. 13 shows a photograph of the design surface of one of the vehicle wheels produced by the casting method (the surface layer is not processed).

  (Consideration) From the inspection results shown in Table 1, it was confirmed that when the method for processing a surface layer of a vehicle wheel according to the present invention was performed, the number of holes and protrusions (micro casting defects) was drastically reduced. Therefore, according to the method for processing a surface layer of a vehicle wheel according to the present invention, it is possible to greatly reduce the burden of correction processing using putty filling, paper cutting or lathe, and it is possible to improve the production efficiency of the vehicle wheel. It is.

  In addition, as shown in FIGS. 11 to 13, even when the vehicle wheel surface layer processing method according to the present invention is applied (see FIGS. 11 and 12), the surface (design surface) has a cast surface feeling. It can be seen that the vehicle wheel according to the present invention is almost the same as the surface not subjected to the surface layer processing method (see FIG. 13). In particular, in Example 1 in which the diameter of the processed material is φ5 mm, it is difficult to visually determine the difference in cast surface feeling from Comparative Example 1 in which the vehicle wheel surface layer processing method according to the present invention is not applied. It was so much.

  The vehicle wheel surface layer processing jig according to the present invention can be used as a means for efficiently repairing a minute casting defect generated in a surface layer of a vehicle wheel that is a vehicle wheel. The jig for surface layer processing of a vehicle wheel according to the present invention makes it possible for the first time to repair a fine casting defect (surface layer processing) as one step in the mass production process. In particular, it can be suitably used when the surface layer processing is applied to the manufacturing process of a vehicle wheel of a beautiful cast product that has a surface such as a cast surface and has no defects.

  The vehicle wheel surface layer processing apparatus according to the present invention includes the vehicle wheel surface layer processing jig according to the present invention, and the vehicle wheel incorporated therein is swung in the vertical direction so that the surface is processed. It can be suitably used as a means for performing layer processing.

It is a figure which shows one Embodiment of the jig | tool for surface layer processing of the wheel for vehicles which concerns on this invention, and is a perspective view which shows only the container member of the jig | tool for surface layer processing. It is a figure which shows one Embodiment of the surface layer processing jig | tool of the wheel for vehicles which concerns on this invention, and is a top view containing a top-plate member. It is a figure which shows one Embodiment of the surface layer processing jig | tool of the vehicle wheel which concerns on this invention, and is sectional drawing showing DD cross section in FIG. 2A (The vehicle wheel is integrated). It is a top view which shows one Embodiment of the surface layer processing apparatus for vehicle wheels which concerns on this invention. It is A arrow directional view (front view) of the surface layer processing apparatus shown by FIG. 3 (the to-be-oscillated body is drawn). It is a B arrow line view (right side view) of the surface layer processing apparatus shown by FIG. 3 (The vibration suppression weight is removed). It is a figure which shows one Embodiment of the surface layer processing jig | tool of the vehicle wheel which concerns on this invention, and is a surface layer in the state which incorporated the vehicle wheel in the surface layer processing jig | tool of the vehicle wheel which concerns on this invention It is a fragmentary sectional view showing a mode that processing is performed. It is a figure which shows one Embodiment of the surface layer processing jig | tool of the vehicle wheel which concerns on this invention, and is sectional drawing showing a part of surface and surface layer of the vehicle wheel after casting. It is a figure which shows one Embodiment of the jig | tool for surface layer processing of the vehicle wheel which concerns on this invention, and is a fragmentary sectional view for demonstrating the effect | action of surface layer processing. It is a perspective view which shows an example of the wheel for vehicles. It is sectional drawing which shows CC cross section in FIG. It is a drawing alternative photograph in an Example, and is a photograph of the design side of the wheel for vehicles which processed the surface layer. It is a drawing alternative photograph in an Example, and is a photograph of the design side of the wheel for vehicles which processed the surface layer. It is a drawing alternative photograph in an Example, and is a photograph of the design side of the wheel for vehicles which has not performed processing of a surface layer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Jig for surface layer processing, 2 Surface layer processing apparatus, 11 Pore, 12 Hole part, 13 Protrusion part, 14 Surface layer part, 22 Vehicle wheel, 23 Oscillator, 24 Vibration suppression weight, 25 Work material, 26 Closed space, 31 Air spring, 32 Counterweight, 33 Base plate, 34, 37 Pulley, 35 Belt, 36 Motor, 38, 39 Crank, 40 Rotating shaft, 41 Connecting rod, 42 Swing plate, 43a, 43b, 43c, 43d Linear bearing, 45 bearing, 53 base, 61 container member, 62 bottom plate part, 63, 63a, 63b edge wall part, 64 projecting shaft part, 65 sub projecting shaft part, 66 screw hole, 67a, 67b, 67c, 67d connection Portion, 71 tightening member, 81 top plate member, 92 inner rim, 93 outer rim, 94 disc, 94a, 94b (of vehicle wheel Disc of) surface, 95 the hub hole 96 mounting bolt holes.

Claims (4)

A jig used for processing a surface layer of the disk in a vehicle wheel having a rim and a disk,
A bottom plate portion which is a substrate of the jig, an edge wall portion arranged circumferentially on the bottom plate portion, and positioned on the center of the edge wall portion arranged circumferentially on the bottom plate portion. A container member having one protrusion shaft portion disposed on the protrusion shaft portion and a plurality of sub-projection shaft portions disposed around the protrusion shaft portion;
A fastening member disposed at the tip of the protruding shaft portion of the container member for fixing the vehicle wheel to the container member;
A vehicle including at least a spherical body or a polyhedron having a specific gravity of 2 or more and a diameter of φ1.5 mm or more and φ20 mm or less housed in a space surrounded by the bottom plate portion and the edge wall portion of the container member. Wheel surface layer processing jig.   The jig for surface layer processing of the wheel for vehicles according to claim 1 further provided with a circular top plate member attached to a tip of said projection axis part in said container member.   The jig for surface layer processing of a vehicle wheel according to claim 1 or 2, wherein a spherical body or a polyhedron having a diameter of φ1.5 mm to φ20 mm occupies 5 to 30% by volume of the processed material.   4. The vehicle wheel surface layer processing jig according to any one of claims 1 to 3, wherein the vehicle wheel is a light alloy casting.