JP3764151B2 - Valve seat processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a valve seat processing apparatus in a check valve that supplies a fluid such as fuel or control oil in an internal combustion engine, a hydraulic control mechanism, or the like and prevents a backflow by seating or separating a valve member.
[0002]
[Prior art]
  The check valve is widely used in a fluid supply path such as fuel and oil. For example, a check valve that prevents the fuel from flowing back from the fuel discharge passage to the fuel pressurizing chamber is installed in the fuel discharge portion of a high-pressure fuel pump of a diesel engine. A ball may be used as a valve member of a check valve that sits on such a valve seat and prevents the fuel from flowing back from the fuel discharge passage to the fuel pressurizing chamber. The valve seat has a concave conical surface that gradually decreases in diameter in the direction in which the ball is seated. The roundness and surface roughness of the concave conical surface at which the ball is seated must be processed with high accuracy in order to prevent backflow of fuel.
[0003]
  Polishing, grinding, etc. are known as such valve seat processing methods. However, in order to finish the concave conical surface, which is the valve seat, with a rough finish by cutting and then finish with high precision by polishing, polishing is required. Materials such as materials are required, and not only the material cost is increased, but also treatment of used abrasives is required, and further, the processing takes a long time, so that the processing cost increases. In addition, since the grinding method does not require a material such as an abrasive, the processing cost can be reduced as compared with the polishing process, but the processing cost is still high. Further, in the polishing process and the grinding process, when the valve seat is formed at a position that enters the back of the workpiece from the surface of the workpiece that becomes the valve seat, it is difficult to finish the valve seat with high accuracy.
[0004]
  For this reason, the ball is strongly pressed onto the rough concave conical surface, and the shape of the ball is transferred to the concave conical surface, which is a valve seat. There has been proposed a method of processing a valve seat that reliably seals fuel from the seat (see, for example, Patent Document 1).
[0005]
  And a step of cutting the concave conical surface that the ball is seated on and the diameter of the ball is reduced in the seating direction, and a step of pressing the concave conical surface with the convex conical surface of the punch after the cutting, The spread angle of the convex conical surface in the direction in which the ball separates is α, the spread angle in the direction in which the ball separates before pressing the concave conical surface is β, and the convex conical surface is The ball is seated in a state in which the convex conical surface presses the concave conical surface on the inner peripheral surface of the passage that is located next to the concave conical surface in the direction of pushing the concave conical surface and forms the fluid passage. A valve seat machining method is also proposed in which γ <α <β is set, where γ is the spread angle of the inner circumferential surface of the passage in the direction (see, for example, Patent Document 2).
[0006]
[Patent Document 1]
                JP-A-56-154160
[Patent Document 2]
                JP 2002-340205 A
[0007]
[Problems to be solved by the invention]
  Since the processing method described in Patent Document 1 merely presses the ball against the concave conical surface, there is an advantage that the valve seat can be easily processed in a short time, while the concave shape is maintained while pressing the ball against the concave conical surface. The conical surface is deformed into the shape of a ball, but when the ball is separated from the valve seat, the concave conical surface is elastically recovered, and the shape of the valve seat after the elastic recovery is not the same as the shape of the ball. Further, when the ball presses the concave conical surface, the concave conical surface pressed at a position away from the bottom side of the ball has a smaller pressing force than the concave conical surface pressed to the bottom side of the ball. The concave conical surface of the portion pressed by the ball with this small force is difficult to improve the roundness and surface roughness of the surface roughened by cutting. Therefore, fuel may leak from between the ball and the valve seat. Further, since a step is formed at the boundary between the portion recessed in the shape of the ball and the portion not pressed by the ball, there is a problem that it is difficult for the ball to be stably seated on the valve seat.
[0008]
  On the other hand, the processing method described in Patent Document 2 forms a valve seat by forming a concave conical surface of a workpiece to be a valve seat by cutting and then pressing the surface with a punch having a convex conical surface. The cost can be suppressed to almost the same level as the processing method described in the cited document 1, and there is a problem of elastic recovery of the surface-pressed portion as in the processing method described in the cited document 1 that strongly pressurizes the ball. It is unlikely to occur, and since the difference in pressing force depending on the position pressed by the punch is small, the concave conical surface can be processed evenly, and there is no step at the boundary between the surface pressing processed portion and the non-processed portion by the punch. Has the advantage of
[0009]
  However, in the processing method described in Patent Document 2, the roundness and smoothness of the convex conical surface of the punch are directly transferred to the roundness and smoothness of the concave conical surface of the valve seat. The convex conical surface must be finished with a high roundness without burrs and undulations, and a high smooth surface, and the state must be maintained. Production of a punch with a high smooth surface and maintenance of its state are complicated. Further, the entire circumferential surface of the concave conical surface with the workpiece spreading angle β is simultaneously pressed by the convex cone surface of the punch with the spreading angle α (<β), and the workpiece spreading angle is set as the punch spreading angle α. Since the expansion processing is performed so as to be equal, the pressing force of the punch becomes very large, and the support rigidity of the workpiece and the punch also becomes large. Further, since the meat corresponding to the difference (β−α) between the workpiece spread angle β and the punch spread angle α escapes toward the outer periphery direction of the workpiece and / or the seating direction of the ball, the bump due to the escaped meat is There is a problem that it is easy to do.
[0010]
  The present applicant separately faces a processing tool having a convex conical surface on a concave conical surface serving as a valve seat of a check valve work for supplying a fluid or preventing backflow by seating or separating a valve member. In the pressing processing method, the axis of the workpiece having a concave conical surface serving as a valve seat and the axis of the processing tool having a convex conical surface pressing the concave conical surface of the workpiece in a parallel state, and Then, a processing method for a valve seat was proposed in which the concave conical surface of the workpiece is pressed by the convex conical surface of the processing tool while the workpiece is rotated in the offset state.
[0011]
  Further, the present applicant separately carries out the above-described processing method of the valve seat, and a workpiece support means for rotatably supporting a workpiece having a concave conical surface about the axis, and a processing tool having a convex conical surface. A valve seat processing apparatus comprising: a processing tool supporting means for supporting the shaft center of the workpiece in a state parallel to the axis of the workpiece and in an offset state; and a moving means for relatively moving the processing tool and the workpiece. Proposed.
[0012]
  However, the above-described valve seat processing apparatus automatically supplies a workpiece having a concave conical surface serving as a valve seat to the workpiece processing means, and automatically takes out a processed workpiece obtained by processing the concave conical surface from the workpiece processing means. Therefore, it is desired to automatically supply and take out the workpiece. Further, there is a demand for an automated facility that can be widely applied not only to such rotary surface pressing but also to other valve seat processing methods.
[0013]
  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a valve seat processing apparatus that can perform the above-described rotary surface pressing processing and ball high pressure processing and has excellent productivity.
[0014]
[Means for Solving the Problems]
  In order to solve the above-described problems, the valve seat processing apparatus according to the present invention has a concave conical surface of a check valve work for supplying a fluid or preventing a backflow by seating or separating a valve member on the valve seat. A workpiece supply unit that supplies a workpiece having a concave conical surface, a workpiece transfer position, a workpiece machining position, and a workpiece discharge position, and adds the concave cone surface of the workpiece at the workpiece machining position. A workpiece processing section that processes by pressing with a tool, a workpiece stock section that stocks processed workpieces, a workpiece conveyance path that conveys the workpiece from the workpiece supply section to the workpiece processing section, and a workpiece that has been processed from the workpiece processing section With a workpiece transfer path for transferring to the workpiece stock sectionThe processing tool is provided with a convex conical surface for processing the concave conical surface of the workpiece, and the spreading angle α of the convex conical surface of the processing tool and the spreading angle β of the concave conical surface of the workpiece are α = β is set, and the workpiece machining unit includes workpiece rotation means for rotating the workpiece by arranging the workpiece axis and the machining tool axis in parallel and in an offset state.It is characterized by having.
[0015]
  According to the processing tool, the concave conical surface of the work can be pressed with the convex conical surface of the processing tool while rotating the work, and the concave conical surface of the work has high roundness and high gloss. Can be processed.
[0016]
  That is, while the machining method described in Patent Document 2 is a method in which the entire circumferential surface of the concave conical surface of the workpiece in a stationary state is simultaneously pressed with the entire circumferential surface of the convex conical surface of the processing tool. ,Up The machining apparatus described above makes the shaft center of the workpiece and the machining tool in an offset state, and while rotating the workpiece, presses a part of the concave conical surface of the workpiece with a part of the convex conical surface of the machining tool, Rotating surface pressing is performed to perform surface pressing while sequentially moving the surface pressing portion in the circumferential direction.
[0017]
  According to the processing apparatus that performs this rotational surface pressing, the convex conical surface of the processing tool partially presses the concave conical surface of the workpiece, so that the pressing force of the processing tool is concentrated on that portion. For this reason, compared with the full surface simultaneous surface pressing method described in Patent Document 2, the pressing force of the processing tool can be reduced, and the support rigidity of the processing tool and the workpiece can be reduced. Further, even if the convex conical surface of the processing tool is not so highly accurate, it can be processed to have high roundness and high glossiness by relatively rotating the workpiece and the processing tool. Moreover, since the spread angle α of the convex conical surface of the processing tool is equal to the spread angle β of the concave conical surface of the work, the amount of meat escaping from the surface pressing portion of the work by the processing tool is small, The meat escapes in the circumferential direction of the concave conical surface of the workpiece, and the escaped meat is pressed by the processing tool, so that no bumps are generated due to the escaped meat.
[0018]
  The workpiece processing unit supports a workpiece, a workpiece moving unit that moves the workpiece supporting unit, a processing tool supporting unit that supports the processing tool, and a processing tool that moves the processing tool supporting unit toward the workpiece. It is preferable that the workpiece moving means sequentially move the workpiece supporting means to a workpiece delivery position, a workpiece machining position, and a workpiece discharge position.
[0019]
  Also, two sets of the workpiece supply unit, the workpiece conveyance path, the workpiece machining unit, the workpiece conveyance path, and the workpiece stock unit may be provided.
[0020]
  The workpiece has a concave conical surface serving as a valve seat at one end, and a concave conical surface serving as a fluid guide at the other end, and one set serves as a valve seat at one end of the workpiece. It is preferable to provide a workpiece machining unit that performs surface pressing of the conical surface, and a workpiece machining unit that performs surface pressing of the concave conical surface that serves as a fluid guide at the other end of the workpiece.
[0021]
  That is, the processing device of the present invention transports a workpiece from the workpiece supply unit to the workpiece machining unit via the workpiece conveyance path, processes the concave conical surface of the workpiece by the workpiece machining unit, and transfers the processed workpiece to the workpiece Since the workpiece stock is stocked through the path, the concave conical surface of the workpiece can be continuously processed, and the productivity is improved.
[0022]
  In addition, the workpiece processing section moves the workpiece support means for supporting the workpiece, the workpiece moving means for moving the workpiece support means, the processing tool support means for supporting the processing tool, and the processing tool support means toward the workpiece. A work tool moving means, and the work moving means sequentially moves the work supporting means to a work delivery position, a work machining position, and a work discharge position, thereby facilitating the layout design of each means. Become.
[0023]
  If two sets of the workpiece supply unit, workpiece conveyance path, workpiece machining unit, workpiece conveyance path, and workpiece stock unit are provided, the concave conical surfaces of the same type of workpiece are simultaneously machined in parallel on both lines. Further, the productivity can be improved, and the concave conical surface of the workpiece of one type can be processed, and the concave conical surface of the workpiece of another type can be processed using the other set.
[0024]
  The workpiece has a concave conical surface that serves as a valve seat at one end and a concave conical surface that serves as a fluid guide at the other end. The workpiece supply unit, the workpiece conveyance path, the workpiece processing unit, and the workpiece conveyance path And two workpiece stock portions, one of which has a workpiece processing portion for pressing a concave conical surface which serves as a valve seat for the workpiece, and the other of which has a concave conical surface which serves as a fluid guide. By providing the workpiece machining section that performs the pushing process, the concave conical surfaces at both ends of the workpiece can be efficiently subjected to the rotating surface pushing process, and the productivity is improved.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of a valve seat processing apparatus according to the present invention will be described below with reference to the drawings.
[0026]
  As shown in FIG. 1, a workpiece 10 serving as a valve seat processed by the processing apparatus of the present invention includes a fluid passage 11 formed along a central axis thereof, and a valve seat formed at a distal end portion of the fluid passage 11. And a concave conical surface 12 serving as a fluid guide formed at the rear end of the fluid passage 11. The fluid passage 11, the concave conical surface 12 and the concave conical surface 13 are formed by cutting or the like. The concave conical surface 12 serving as a valve seat has a spread angle β toward the direction in which the ball separates, and the concave conical surface 13 serving as a fluid guide has a spread angle δ toward the direction in which the ball is seated.
[0027]
  As shown in FIGS. 2 to 4, the valve seat processing method according to the embodiment of the valve seat processing apparatus of the present invention is applied to the concave conical surface 12 serving as the valve seat of the workpiece 10 while rotating the workpiece 10. The valve seat processing tool 20 is pressed and processed. The valve seat processing tool 20 has a convex conical surface 21 having an expansion angle α toward the direction in which the ball separates. The spread angle α of the convex conical surface 21 in the valve seat processing tool 20 and the spread angle β of the concave conical surface 12 of the workpiece 10 are set to α = β. Further, as apparent from FIG. 3, the axis c1 of the workpiece 10 and the axis c2 of the valve seat processing tool 20 are in a parallel state and offset by a dimension d. Here, the valve seat processing tool 20 is formed of a material having a hardness higher than that of the workpiece 10.
[0028]
  For example, when the valve seat processing tool 20 is moved toward the work 10 along the axis c2 while rotating the work 10, the convex shape of the valve seat processing tool 20 is obtained as shown in FIGS. A part in the circumferential direction on the conical surface 21 (upper part in FIGS. 3 and 4) is a part of a part in the circumferential direction on the concave conical surface 12 of the work 10 (upper part in FIGS. 3 and 4) with a small area. Push it. A gap s is formed below the workpiece 10 and the valve seat processing tool 20. Since the workpiece 10 is rotated about the axis c1, the concave conical surface 12 of the workpiece 10 is sequentially pressed by the convex conical surface 21 of the valve seat processing tool 20 along the circumferential direction.
[0029]
  In this surface pressing process, the meat pressed by the convex conical surface 21 of the valve seat processing tool 20 is deformed in the radially outward direction of the concave conical surface 12 or the balls as in the conventional processing method described in Patent Document 2. Instead of moving in the seating direction, as shown in FIG. 4, the workpiece 10 and the valve seat processing tool 20 move from the small surface pressing portion p in the circumferential conical surface 12 of the concave conical surface 12 to both sides a and b. Then, since the moved meat is gradually leveled by a small area surface pressing process of the workpiece 10 and the valve seat processing tool 20, the processed surface of the concave conical surface 12 is high in roundness. It is processed into a high-precision valve seat with gloss.
[0030]
  Note that the spread angle γ of the fluid guide processing tool 20 (not shown) that processes the concave conical surface 13 serving as the fluid guide at the rear end of the work 10 and the spread angle δ of the concave conical surface 13 of the work 10 are γ. = Δ is set. Therefore, a fluid guide having high roundness and high glossiness can be obtained by rotating the surface of the concave conical surface 13 serving as a fluid guide by the same operation as that of the surface of the concave conical surface 12 serving as a valve seat. To be processed.
[0031]
  Next, an embodiment of a valve seat processing apparatus according to the present invention will be described with reference to the drawings. As shown in FIGS. 5 to 7, the valve seat processing apparatus of the present invention includes a workpiece supply unit 30, a workpiece conveyance path 40, a workpiece processing unit 50, a workpiece conveyance path 60, and a workpiece stock unit 70. I have. Two sets of the workpiece supply unit 30 to the workpiece stock unit 70 are provided on the left and right sides, and in both sets, the processing method of the valve seat that strongly pressurizes the ball serving as the valve member is executed simultaneously, Although the rotary surface pressing method of the concave conical surface 12 serving as the valve seat at the tip portion of 10 can be carried out simultaneously, for example, the valve seat at the tip portion of the workpiece 10 with one set (for example, the right side) A, for example. Assuming a case where the rotary conical surface 12 of the concave conical surface 12 is performed, and the concave conical surface 13 serving as a fluid guide at the rear end portion of the work 10 is performed by the other group (for example, the left side) B. Shall be explained. Since one set A and the other set B have substantially the same configuration, the configuration and operation of one set A will be described below, and the configuration and operation of the other set B will be described as needed. To do.
[0032]
  The workpiece supply unit 30 includes a support base 31, a parts feeder 32 installed on the support base 31, and a vibrator (not shown) that is provided in the support base 31 and vibrates the parts feeder 32.
[0033]
  The workpiece conveyance path 40 includes a deformable conveyance pipe 41 made of copper or resin, a workpiece cutting portion 42 provided in the middle of the conveyance pipe 41, and a workpiece supply control sensor 43 that detects passage of the workpiece to be conveyed. And the operation of the vibrator of the parts feeder 32 and the workpiece cutting part 42 is controlled in accordance with the detection output of the workpiece supply control sensor 43.
[0034]
  The workpiece cutting part 42 is interposed in the middle of the conveying pipe 41, and as shown in FIG. 8A, the stoppers 423 and 424 of the two air cylinders 421 and 422 are conveyed at a predetermined timing. 41 is configured to enter and exit. As shown in FIG. 8A, when the upstream stopper 423 is open and the downstream stopper 424 is closed, the conveyance of the workpiece 10 is stopped by the stopper 424. As shown in FIG. 8B, when the downstream stopper 424 remains closed and the upstream stopper 424 is closed, only one workpiece 10 is cut out. As shown in FIG. 8C, when the upstream stopper 423 remains closed and the downstream stopper 424 is opened, one piece of the workpiece 10 that has been cut out is sent out to the transport pipe 41. .
[0035]
  The workpiece control sensor 43 is provided on the downstream side of the workpiece cutting section 42 in the transport pipe 41, detects each time one workpiece 10 is fed, and operates the workpiece cutting section 42 based on the detection output. Or the vibrator of the parts feeder 32 is operated. The vibrator may operate when it detects a predetermined number of outputs.
[0036]
  The workpiece machining unit 50 is mounted on a support base 51, and has a workpiece receiving position P1, a workpiece machining position P2, and a workpiece discharge position P3 as shown in FIG. Also, a workpiece support means 52 for rotatably supporting the workpiece 10, a workpiece moving means 53 for moving the workpiece support means 52 supporting the workpiece 10 to the positions P1, P2, and P3, and a workpiece machining position. A processing tool support means 54, a processing tool moving means 55, and a work rotating means 56 arranged at P2 are provided.
[0037]
  For example, as shown in FIGS. 10 and 11, the work support means 52 has a plurality of chuck claws (four in FIG. 11) 521, and suitable drive means (for example, mechanism, air, hydraulic pressure, solenoid). The chuck claws 521 open and close around the support shaft 522, and the workpiece 10 is chucked when the chuck claws 521 are closed, and the workpiece 10 is released when the chuck claws 521 are opened. .
[0038]
  For example, as shown in FIG. 12, the workpiece moving means 53 includes upper and lower two-stage air cylinders 531 and 532, and a workpiece support means 52 is attached to the upper air cylinder 531. When both the upper and lower air cylinders 531 and 532 are retracted, the workpiece support means 52 is positioned at the workpiece supply position P1, and when both the upper and lower air cylinders 531 and 532 are extended, the workpiece support means 52 is moved to the workpiece machining position. When only the upper air cylinder 531 extends and is located at P2, the work support means 52 operates so as to be located at the work discharge position P3.
[0039]
  The processing tool support means 54 is provided with a plurality of chuck claws 541 similarly to the work support means 52 described above, and these chucks are provided by appropriate drive means (for example, a mechanism, air, hydraulic pressure, solenoid, etc.). The claw 541 opens and closes around the support shaft 542. When the chuck claw 541 is closed, the valve seat processing tool 20 is chucked, and when the chuck claw 541 is opened, the processing tool 20 is released.
[0040]
  The processing tool moving means 55 includes a drive motor that moves the valve seat processing tool 20 supported by the processing tool support means 54 in the direction of the workpiece 10, an air or hydraulic cylinder, and the like.
[0041]
  Further, the work rotation means 56 is constituted by a drive motor that rotationally drives the work 10 that is rotatably supported by the work support means 52.
[0042]
  A workpiece conveyance path 60 for conveying a processed workpiece is connected to the workpiece discharge position P3. Similar to the work transfer path 40, the work transfer path 60 includes a transfer pipe 61. A work stock unit 70 for stocking the processed work is disposed at the tip of the work transport path 60.
[0043]
  Next, the operation of the above processing apparatus will be described. First, a large number of workpieces 10 are accommodated in the parts feeder 32 of the workpiece supply unit 30, and the parts feeder 32 is vibrated by a vibrator. Then, as is well known, the workpiece 10 is aligned in the length direction and goes up the slope of the parts feeder 32. If a removal means (not shown) for removing the workpiece 10 with the concave conical surface 12 at the front end removed is dropped in the middle of the inclined path, a rear portion of the workpiece feeder 32 transfers the workpiece pipe 41 to the conveying pipe 41. Only the workpiece 10 with the concave conical surface 13 at the end facing forward in the traveling direction is continuously supplied.
[0044]
  As described above, the workpiece 10 that is continuously conveyed through the conveyance pipe 41 is advanced and retracted at predetermined timing by the stoppers 423 and 424 of the two air cylinders 421 and 422 in the workpiece cutting portion 42. One by one is sequentially conveyed. That is, when the stopper 424 of the downstream air cylinder 422 advances to close the conveyance path and the stopper 423 of the upstream air cylinder 421 retracts, the workpiece 10 is stopped by the stopper 424 of the downstream air cylinder 422. {FIG. 8 (A)}. Next, when the stopper 423 of the upstream air cylinder 421 advances and closes, only one workpiece 10 is cut out {FIG. 8B}. Next, when the stopper 424 of the downstream air cylinder 422 is retracted and opened while the stopper 423 of the upstream air cylinder 421 is closed, one workpiece 10 is sent out to the workpiece conveyance path 40 {FIG. (C)}. Thereafter, similarly, the stoppers 423 and 424 of the air cylinders 421 and 422 of the workpiece cutting section 42 are advanced and retracted to convey the workpieces 10 one by one.
[0045]
  When one workpiece 10 passes through the position where the workpiece control sensor 43 is disposed, the workpiece control sensor 43 detects it and sends a signal to the vibrator of the parts feeder 32 and the workpiece cutting section 42 to control their operation. To do.
[0046]
  In the workpiece machining unit 50, both the upper and lower air cylinders 531 and 532 of the workpiece moving means 53 are retracted, and the workpiece support means 52 is waiting at the workpiece supply position P1 with the chuck pawl 521 open. . Therefore, the workpiece 10 that has been conveyed through the workpiece conveyance path 40 is chucked by the chuck claw 521 of the workpiece support means 52 waiting at the workpiece supply position P1 with the concave conical surface 12 serving as a valve seat facing outward. The Then, both the upper and lower air cylinders 531 and 532 of the workpiece moving means 53 are extended to move the workpiece support means 52 to the workpiece machining position P2.
[0047]
  At the workpiece machining position P2, as shown in FIG. 10, the axis c1 of the workpiece 10 supported by the workpiece support means 52 and the axis c2 of the valve seat machining tool 20 supported by the machining tool support means 54 are: The parallel state and the offset state by the dimension d are maintained. In this state, the workpiece rotating means 56 rotates the workpiece 10 and the processing tool moving means 55 supports the valve seat processing tool 20 supported by the processing tool support means 54 toward the workpiece 10 supported by the workpiece support means 52. To move. Then, as described above, based on the offset dimension d between the axis c1 of the workpiece 10 and the axis c2 of the valve seat processing tool 20, as shown in FIGS. A part of the conical surface 21 rotates and presses a part of the concave conical surface 12 of the workpiece 10 to form a valve seat with high circularity and high glossiness.
[0048]
  When the rotary surface pressing of the concave conical surface 12 of the work 10 is finished, only the lower air cylinder 532 of the work moving means 53 is retracted, and the work support means 52 is moved to the work discharge position P3. Then, the chuck claw 521 of the workpiece support means 52 is opened, and the workpiece 10 is released from the workpiece support means 52 by blowing compressed air or the like, and is stocked in the workpiece stock section 70 through the workpiece conveyance path 60. In the same manner, the concave conical surface 12 at the tip of the workpiece 10 is successively subjected to rotary surface pressing.
[0049]
  In the group B on the left side of FIG. 5, the rotary surface pressing of the concave conical surface 13 at the rear end of the workpiece 10 is performed. Therefore, the parts feeder 32 of the workpiece supply unit 30 is configured to exclude and drop the workpiece 10 having the concave conical surface 13 at the rear end on the front side out of the workpiece 10 that goes up the slope, Only the workpiece 10 with the concave conical surface 12 at the tip thereof facing forward in the traveling direction is supplied to the path 40.
[0050]
  Further, the workpiece support means 52 has the concave conical surface 13 serving as a fluid guide at the rear end portion of the workpiece 10 facing outward, as opposed to the set A on the right side of the drawing, which processes the concave conical surface 12 serving as a valve seat. Thus, the workpiece 10 is chucked by the chuck claws 521.
[0051]
  Further, the processing tool support means 54 chucks the fluid guide processing tool 20 having the convex conical surface 21 having an expansion angle γ that coincides with the expansion angle δ of the concave conical surface 13 at the rear end of the work 10.
[0052]
  Other configurations are the same as those in the group A on the right side of FIG. In the left side set B, the concave conical surface 13 at the rear end of the workpiece 10 has a fluid guide addition in the same manner as described above depending on the offset state between the axis c1 of the workpiece 10 and the axis c2 of the fluid guide processing tool 20 '. A fluid guide having a high roundness and a high glossiness is formed by a rotary surface pressing process using the convex conical surface 21 ′ of the tool 20 ′.
[0053]
  Therefore, for example, the unprocessed workpiece 10 is supplied to the workpiece supply unit 30 of the set A on the right side of FIG. When the workpiece 10 formed in the workpiece stock 70 is stocked, and the workpiece 10 stocked in the workpiece stock 70 is supplied to the workpiece supply unit 30 of the group B on the left side, the rear end of the workpiece 10 is continuously provided. Rotational surface pressing of the concave conical surface 13 can be performed.
[0054]
  FIG. 13 shows a valve 84 which is a valve member on a valve seat 82 of a valve body having a fluid passage 81 at the center processed by the present invention, a valve seat 82 at the front end and a fluid guide 83 at the rear end. Fig. 5 illustrates an embodiment of a check valve 80 that is seated or unseated. The ball 84 in the check valve 80 is constantly urged toward the valve seat 82 by a compression spring (not shown).
[0055]
  According to the processing apparatus of the present invention, for example, when the ball 84 is seated on the valve seat 82, the target accuracy (± 0.01) of the dimension H from the tip surface of the check valve 80 to the top of the ball 84, the valve With a high roundness that can be sufficiently satisfied with respect to the target accuracy (± 1 °) of the spread angle β in the direction in which the ball 84 in the seat 82 moves away, and the target value 1.6Z of the smoothness of the valve seat 82, Moreover, the surface pressing process could be performed with high glossiness.
[0056]
  This check valve 80 can be applied to, for example, a fuel supply path of a diesel engine or a control oil supply path of a hydraulic control mechanism. For example, when applied to a hydraulic control mechanism of a solenoid in an ABS (anti-lock brake system), if the pressure of control oil supplied to the fluid passage 81 by a pressure pump exceeds the elastic force of the compression spring, As the ball 84 is separated from the valve seat 82, the control oil is supplied to the hydraulic control mechanism. When the pressure pump is stopped, the pressure of the control oil becomes smaller than the elastic force of the compression spring. Therefore, the ball 84 is seated on the valve seat 82 by the elastic force of the compression spring, thereby preventing the control oil from flowing back.
[0057]
  In addition, although said description demonstrated specific embodiment, this invention is not limited to this embodiment, A various deformation | transformation is possible in the range which does not deviate from the mind.
[0058]
  For example, in the above-described embodiment, the workpiece 10 supported by the workpiece support means 52 is moved by the workpiece moving means 53, rotated by the workpiece rotation means 56, and the processing tools 20, 20 'supported by the processing tool support means 54 are moved. Although the case where the workpiece is moved by the processing tool moving means 55 has been described, in this case, the workpiece support means 52 shares the support of the workpiece 10, the workpiece moving means 53 shares the movement operation of the workpiece, and the machining tool moving means 55. Share the moving operation of the processing tools 20 and 20 ', and the work rotating means 56 shares the rotating operation of the work 10. Therefore, there is an advantage that each configuration can be simplified, but the work 10 and the processing tools 20 and 20' are advantageous. May be moved relatively, and contrary to the embodiment, the workpiece 10 may be moved toward the processing tools 20, 20 ′. Alternatively, the workpiece 10 and the processing tools 20, 20 ′ can be moved.
[0059]
  Further, FIG. 9 illustrates the case where the workpiece supply position P1 and the workpiece machining position P2 are located on both sides, and the workpiece discharge position P3 is provided in the center. However, as illustrated in FIG. The work machining position P2 and the work discharge position P3 may be arranged in that order.
[0060]
  Moreover, although FIG. 10 demonstrated the case where the workpiece | work 10 and the processing tool 20 were set to a horizontal direction, you may set to a vertical direction or a diagonal direction.
[0061]
  In the above embodiment, the workpiece support means 52 and the workpiece rotation means 56 are separated, the workpiece rotation means 56 is positioned at the workpiece machining position P2, and only the workpiece support means 52 is moved by the workpiece movement means 53. As described above, the work rotation means 56 may be attached to the work support means 52, and the work support means 52 and the work rotation means 56 may be moved together by the work movement means 53.
[0062]
  Further, in the above-described embodiment, in the workpiece machining unit 50, with the convex cone surface of the machining tool while rotating the workpiece with the axis of the machining tool having the convex cone surface and the axis of the workpiece being offset, Although the case where the concave conical surface of the workpiece is subjected to the rotational surface pressing processing has been described, the ball pressing processing for strongly pressing the ball against the concave conical surface 12 may be performed without rotating the workpiece.
[0063]
【The invention's effect】
  The valve seat processing apparatus of the present invention is a processing apparatus for processing a concave conical surface of a work for a check valve that supplies a fluid or prevents backflow by seating or separating a valve member on a valve seat, A workpiece supply unit that supplies a workpiece having a concave conical surface, a workpiece supply position, a workpiece machining position, and a workpiece discharge position, and workpiece machining by pressing the concave cone surface of the workpiece with a machining tool at the workpiece machining position. A work stock path for stocking processed parts, a work transport path for transporting work from the work supply section to the work processing section, and a work transport path for transporting processed work from the work processing section to the work stock section. Therefore, the concave conical surface of the workpiece can be continuously processed with a processing tool, and productivity is improved.
[0064]
  In addition, the workpiece processing section moves the workpiece support means for supporting the workpiece, the workpiece moving means for moving the workpiece support means, the processing tool support means for supporting the processing tool, and the processing tool support means toward the workpiece. A workpiece movement means, and the workpiece movement means sequentially moves the workpiece support means to a workpiece delivery position, a workpiece machining position, and a workpiece ejection position, thereby delivering and transferring workpieces, machining and ejection. It can be done smoothly.
[0065]
  In addition, when two sets of the workpiece supply unit, the workpiece conveyance path, the workpiece processing unit, the workpiece conveyance path, and the workpiece stock unit are provided, the workpieces of the same type can be processed in parallel using two sets of processing devices. Or work with different varieties.
[0066]
  Further, the processing tool supported by the processing tool support means includes a convex conical surface for processing the concave conical surface of the work, and the spreading angle α of the convex conical surface of the processing tool and the concave conical surface of the work Is set to α = β, and the workpiece machining unit places the workpiece axis and the machining tool axis in parallel and in an offset state, and rotates the workpiece. When the rotating means is provided, the concave conical surface of the workpiece can be pressed by the convex conical surface of the processing tool so as to be processed with high roundness and high glossiness.
[0067]
  The workpiece has a concave conical surface that serves as a valve seat at one end and a concave conical surface that serves as a fluid guide at the other end. The workpiece supply unit, the workpiece conveyance path, the workpiece processing unit, and the workpiece conveyance path And one of the two sets of the work stock portion is provided with a workpiece processing portion that performs surface pressing of a concave conical surface that serves as a valve seat of the workpiece, and the other set includes a surface pressing of a concave conical surface that serves as a fluid guide. When the workpiece processing unit for processing is provided, the concave conical surfaces at both ends of the workpiece can be efficiently rotationally pressed, and the productivity is improved.
[Brief description of the drawings]
FIG. 1 is an enlarged longitudinal sectional view of a workpiece to be machined in a valve seat machining apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view of a workpiece and a processing tool for explaining a processing method according to an embodiment of the valve seat processing apparatus according to the present invention.
FIG. 3 is an enlarged vertical cross-sectional view of a main part of a workpiece and a valve seat processing tool during processing of an embodiment of the valve seat processing apparatus according to the present invention.
FIG. 4 is an enlarged cross-sectional view of a main part in a direction perpendicular to a workpiece and a rotary surface pressing portion of the processing tool in the embodiment of the valve seat processing apparatus according to the present invention.
FIG. 5 is a schematic front view of the valve seat processing apparatus according to the embodiment of the present invention.
FIG. 6 is a schematic plan view of the valve seat processing apparatus according to the embodiment of the present invention.
FIG. 7 is a schematic side view of a workpiece machining unit in the valve seat machining apparatus according to the embodiment of the present invention.
FIG. 8 is a cross-sectional view for explaining the operation of a workpiece cutting portion in the processing apparatus of FIG.
  (A) is the work blocking state,
  (B) is a workpiece cutting state,
  (C) shows a workpiece feeding state.
9 is a schematic configuration plan view of a workpiece machining unit in the machining apparatus of FIG.
10 is an enlarged vertical cross-sectional view of a main part of the work support means and the work tool support means of the embodiment in the work processing portion of FIG. 9;
11 is a front view of a workpiece support means in the workpiece machining section of FIG.
12 is a schematic configuration side view of a workpiece moving means in the workpiece machining section of FIG. 9;
FIG. 13 is a schematic longitudinal sectional view of a check valve of an embodiment having a valve seat processed by the processing apparatus of the present invention.
FIG. 14 is a schematic configuration plan view of a different embodiment of a workpiece machining unit in the machining apparatus of the present invention.
[Explanation of symbols]
  10 work
    11 Fluid passage
    12 Conical concave surface that serves as a valve seat
    13 Conical concave surface that serves as a fluid guide
  20 Valve seat processing tool
    21 Conical convex surface
  30 Work supply section
    32 parts feeder
  40 Work transfer path
    41 Conveying pipe
    42 Work cutting part
    43 Work control sensor
  50 Workpiece processing part
    52 Work support means
    53 Work moving means
    54 Work tool support means
    55 Processing tool moving means
    56 Work rotating means
  60 Work transfer path
  61 Conveying pipe
  70 Workstock Department
  80 Check valve
  81 Fluid passage
  82 Valve seat
  83 Fluid guide
  84 Ball (Valve member)
  α Spreading angle of convex conical surface of valve seat processing tool
  β Spreading angle of concave conical surface for workpiece valve seat
  γ Spread angle of convex conical surface of fluid guide processing tool
  δ Spreading angle of concave conical surface for fluid guide of workpiece
  c1 Workpiece axis
  c2 Center axis of processing tool
  d Offset dimension between workpiece axis and tool axis
  P1 Work supply position
  P2 Work position
  P3 Work discharge position

Claims (4)

A processing device for processing a concave conical surface of a work for a check valve that supplies a fluid or prevents a backflow by seating or separating a valve member on a valve seat,
A workpiece supply unit for supplying a workpiece having a concave conical surface;
A workpiece machining section having a workpiece delivery position, a workpiece machining position, and a workpiece discharge position, and machining the workpiece by pressing the concave conical surface of the workpiece with a machining tool at the workpiece machining position;
A workpiece stock section for stocking processed workpieces;
A workpiece conveyance path for conveying a workpiece from the workpiece supply unit to the workpiece machining unit;
A workpiece transfer path for transferring a processed workpiece from the workpiece processing unit to a workpiece stock unit ;
The processing tool includes a convex conical surface for processing the concave conical surface of the workpiece, and an expansion angle α of the convex conical surface of the processing tool and an expansion angle β of the concave conical surface of the workpiece are α = β. The workpiece machining unit includes workpiece rotation means for rotating the workpiece by arranging the workpiece axis and the machining tool axis in parallel and in an offset state. Valve seat processing equipment.   The workpiece processing unit supports a workpiece, a workpiece moving unit that moves the workpiece supporting unit, a processing tool supporting unit that supports the processing tool, and a processing tool that moves the processing tool supporting unit toward the workpiece. The valve seat according to claim 1, further comprising a moving means, wherein the work moving means sequentially moves the work supporting means to a work delivery position, a work machining position, and a work discharge position. Processing equipment.   3. The valve seat processing apparatus according to claim 1, comprising two sets of the workpiece supply unit, the workpiece conveyance path, the workpiece machining unit, the workpiece conveyance path, and the workpiece stock unit. The work has a concave conical surface that serves as a valve seat at one end, and a concave conical surface that serves as a fluid guide at the other end,
One set includes a workpiece processing portion that performs a surface pressing process of a concave conical surface that serves as a valve seat at one end of the work, and the other group performs a surface pressing process of a concave conical surface that serves as a fluid guide at the other end of the work The valve seat processing apparatus according to claim 3, further comprising a workpiece processing unit to perform.

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