JPH05177B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a dry high-speed fluid polishing device that can uniformly dry high-speed fluid polish a workpiece (object to be polished). [Prior Art] Conventionally, a workpiece (object to be polished) attached to a spindle is placed in a polishing tank filled with media coated with abrasive grains and oil, and the spindle is rotated and rotated in forward and reverse directions. It is known to flow a workpiece in a medium at high speed, thereby polishing the workpiece. (Special Publication No. 37-17646). [Problems to be Solved by the Invention] However, the conventional dry high-speed fluid polishing apparatus of this type may not be able to uniformly polish the entire surface of the workpiece. That is, Fig. 6 shows a state in which a workpiece c is attached and fixed to a spindle a via a jig b, and the spindle a is moved in the direction of arrow R in the figure or in the direction of arrow R.
It rotates (revolutions) in the opposite direction of the spindle and also rotates (rotates) in the r direction or in the opposite direction to the r direction, and as a result, the work c attached to the spindle a rotates in a major revolution and a minor revolution together with it. However, since workpiece c is fixed to spindle a, workpiece c to spindle a
The relative positions of the workpiece c do not change, and therefore, there may be a difference in the polishing finish between the upper and lower parts of the workpiece c, or between the inner and outer surfaces (the surface facing the spindle a and the surface opposite thereto). In addition, the above-mentioned polishing machine usually requires 60 horsepower or more of driving energy, and the driving energy is very high, and the workpiece has a shape with a relatively deep concave surface, such as a spoon or a ladle with a depth of 5. If the diameter is 100 mm, there is a problem that the entire surface including the concave surface cannot be uniformly polished. Furthermore, in the conventional polishing machine as shown in Japanese Patent Publication No. 37-17646, the flow direction of the media in the inner circumferential wall of the polishing tank is opposite to the direction of small revolution of the workpiece, and the media faces the workpiece. In such a polishing machine, the media does not flow smoothly on the surface of the workpiece, and especially when rotating at high speed, the polished surface tends to have small irregularities instead of stripes, making it difficult to obtain a clean polished surface. The present invention was made in view of the above circumstances, and by causing the spindle to revolve and rotate, the workpiece attached to the spindle is rotated together with the revolution and rotation of the spindle, and the relative position of the workpiece with respect to the spindle is also changed. A dry high-speed flow method that can uniformly polish a workpiece, and even polish a workpiece with a relatively deep concave surface, such as a spoon, on the entire surface, including the concave surface, by reducing the driving energy. Aimed at resisting polishing equipment. [Means for Solving the Problems] In order to achieve the above object, the present invention includes a fixed gear and a planetary gear that meshes with the fixed gear, and rotates while rotating the planetary gear along the fixed gear at a speed of 50 rpm or more. By rotating the spindle connected to the planetary gear, the spindle is rotated, and the dry media filled in the static polishing tank is agitated by the rotation of the spindle, thereby causing the dry media to flow at high speed. A dry high-speed fluid polishing device that polishes a workpiece using an abrasive agent attached to a media, wherein the number of gears of the planetary gear and the number of gears of the fixed gear are 1.2:1 to 1.
4:1, the spindle is formed into a cylindrical shape, a rotating shaft is rotatably disposed within the spindle, a rotating mechanism is provided to rotate the rotating shaft, and a workpiece mounting jig is provided at the bottom of the rotating shaft. Install the workpiece to this workpiece mounting jig,
The workpiece is rotated together with the revolution and rotation of the spindle, and is also rotated around a workpiece mounting jig that rotates together with the rotation of the rotating shaft. In this case, the workpiece mounting jig can have a gear fixed to the lower part of the rotating shaft, and can also be fixed to the rotating shaft via a gear that meshes with this gear. Further, as a mechanism for rotating the rotating shaft, a second planetary gear is attached to the rotating shaft, and this second planetary gear is meshed with a second fixed gear, so that the second planetary gear rotates integrally with the revolution of the spindle. By rotating the gear around the second fixed gear while meshing with it, the second planetary gear can be rotated, and the rotating shaft can be rotated together with this rotation, or by attaching a motor to the rotating shaft. A mechanism for rotating this may be adopted. [Function] The polishing apparatus of the present invention fills a dry media in a polishing tank, inserts a spindle and a workpiece supported by the spindle into the media, and causes the spindle and the workpiece to revolve and rotate together with the spindle at high speed. As a result, the entire media is made to flow violently, and the surface of the workpiece is polished by the pressing action of the flowing media against the workpiece. In this case, the media fluidized tank has a down cut on the accumulation side and an up cut on the center side. Accordingly, in the present invention, in such a polishing apparatus, the spindle is formed into a cylindrical shape, a rotating shaft is rotatably disposed within the spindle, and a rotating mechanism for rotating the rotating shaft is provided, and the above-mentioned A workpiece mounting jig is fixed to the lower part of the rotating shaft, the workpiece is mounted on the workpiece mounting jig, and the workpiece is rotated together with the revolution and rotation of the spindle, and the workpiece is also rotated together with the rotation of the rotating shaft. It is designed to rotate around a jig. That is, in the polishing apparatus of the present invention, as described above, the flow of the media (abrasive grains) is performed by the high speed rotation of the spindle.In this case, a relatively light media is used, and it is suitable for use in final polishing. However, in this polishing device, the workpiece rotates around a fixed shaft integrally with the spindle, makes a small revolution around the spindle or rotating shaft, and further revolves around the workpiece mounting shaft. It is something that rotates. In this way, the workpiece rotates together with the revolution and rotation of the spindle, and also rotates separately from the rotation of the spindle, and the relative position of the workpiece to the spindle changes over time. The way the media hits is made as uniform as possible, and deflections such as when the media hits only a certain part of the work strongly or a lot, or conversely, when the media hits weakly or little are prevented as much as possible, so the work surface is uniform,
Evenly polished. Therefore, in the polishing method using the apparatus of the present invention, since the workpiece itself rotates with respect to the spindle, there is no need to change the posture of the workpiece and re-polishing after changing the posture as in the conventional method, and the polishing time is reduced compared to the conventional method. The polishing time can be significantly shortened (to 1/3 or less), and even if the polishing time is significantly shortened, the entire surface of the workpiece can be polished uniformly. Furthermore, in conventional dry high-speed fluid polishing machines such as those disclosed in Japanese Patent Publication No. 37-17646, the gear ratio between the fixed gear and the planetary gear is usually about 7:1 to 5:1. More than the number of gears,
As a result, while the spindle with the work attached revolves around the center of the polishing tank once, the spindle itself rotates many times, making the number of rotations considerably higher than the number of revolutions. When polishing a workpiece with a concave surface measuring 5 to 100 mm, the concave surface remains unpolished, but the number of planetary gears and the number of fixed gears is 1.2:1 to 4. :1, and in this way the number of planetary gears is larger than that of fixed gears,
By lowering the rotational speed compared to the case of Japanese Patent Publication No. 37-17646, it is possible to uniformly polish a workpiece having a relatively deep concave surface, for example, a concave surface of about 5 to 100 mm as described above, over the entire surface including the concave surface. , it is possible to improve the polishing finish on concave surfaces,
Moreover, driving energy can be reduced. Furthermore, according to the polishing apparatus of the present invention, the flow direction of the media near the inner circumferential wall of the polishing tank can be made to match the direction of small revolution of the workpiece, so that the flow of the media on the workpiece surface becomes smooth and the media flow. Even with high-speed flow, the polishing surface provides a good finished surface with stripes, and the entire workpiece can be polished uniformly, and the force required for spindle rotation and revolution can be reduced.
Therefore, the device can be downsized and labor can be saved. [First Embodiment] Hereinafter, one embodiment of the present invention will be described with reference to FIG. 1 in the figure is a polishing tank, inside which is a media 2.
is filled. Reference numeral 3 denotes a cylindrical box supported by the fuselage (not shown), and a gear box 4 is accommodated within this cylindrical box 3. A cylindrical shaft 5 is protruded from the center of the upper wall 4a of the gearbox 4, and a ring-shaped drive pulley 6 is protruded from the upper end of the shaft 5. The cylindrical shaft body 5 is rotatably supported by bearings 8, 8 fixed to the cylindrical box 3 and a pedestal 7 placed thereon, respectively, and the pulley 6 is supported by belts 9, 9. The pulley 6 is connected to a drive source M such as a motor via a motor, and the pulley 6 is rotated by the drive of the drive source M, and the cylindrical shaft body 5 and gear box 4 are rotated together with the pulley 6. A fixed shaft body 10 is disposed within the cylindrical shaft body 5 . The upper end of this fixed shaft body 10 penetrates the drive pulley 6 and the ceiling plate 11 of the fuselage and projects upward, and this protruding upper end is fixed by a support 12 fixed on the ceiling plate 11, and The lower part of the shaft body 10 projects into the gearbox 4. A disk-shaped first fixed gear 13 is fixed to the lower end of the protruding lower part of the fixed shaft body 10, and a ring-shaped second fixed gear 14 is attached at a predetermined position above the first fixed gear 13. Fixed. Note that bearings 15, 15 are provided at the upper and lower ends of the inner wall of the cylindrical shaft 5, respectively, so that the cylindrical shaft 5 can smoothly rotate relative to the fixed shaft 10. It is configured. Further, the gear box 4 is provided with a ring-shaped partition wall 4b to partition the first and second fixed gears 13 and 14, and the partition wall 4b
and bearings 16, 1 fixed to the lower wall 4c, respectively.
Two cylindrical spindles 17, 17', which are rotatably mounted on 6, 16', 16', respectively, are arranged. Note that these spindles 17, 17'
The lower portions of the gearboxes pass through the lower wall 4c of the gearbox and protrude downward, respectively. the spindle 17,
First planetary gears 18 and 18', which exist in the gearbox 4 and mesh with the first fixed gear 13, are fixed to the upper part of the gearbox 17', and when the gearbox 4 rotates, the spindle rotates integrally with this rotation. 17, 17' rotate (revolution along the first fixed gear 13), and at this time, the first planetary gear 1
8 and 18' rotate along the first fixed gear 13 while meshing with the first fixed gear 13, and the spindles 17 and 17' rotate (rotate) together with this rotation. Here, the first fixed gear meshing with the first fixed gear 13 is
The number of gears of each of the planetary gears 18 and 18' is greater than the number of gears of the first fixed gear 13. Rotating shafts 19, 19' are rotatably disposed within the cylindrical spindles 17, 17', respectively. The upper ends of these rotating shafts 19, 19' are connected to spindles 1 fixed on the partition wall 4b, respectively.
Second planetary gears 20 and 20', which protrude upwardly through the bearings 16 and 16' of 7 and 17', and are meshed with the second fixed gear 14, respectively, are fixed to the upper ends of the protrusions. Further, the rotating shafts 19, 19'
The upper bevel gears 22, 22' are rotatably disposed in gear cases 21, 21' whose lower ends are fixed to the lower ends of the spindles 17, 17', and which mesh with each other. 22a, 22'a
are fixed respectively. One end of the workpiece mounting jig 23, 23, 23', 23' is fixed to the horizontal bevel gears 22b, 22b, 22'b, 22'b that mesh with the upper bevel gears 22a, 22'a. At the same time, the other end portions penetrate the side walls of the gear cases 21, 21' and protrude laterally, and workpieces 24, 24, 24', 24' to be polished are removably attached to these protruding other end portions. It's starting to become easier. In addition, 25, 25, 25', 25' in the figure are the rotation axis 1, respectively.
This is a bearing that rotatably supports 9 and 19'. Therefore, the rotating shafts 19, 19' rotate as the second planetary gears 20, 20' mesh with the second fixed gear 14 and rotate (revolution) along the second fixed gear 14, and this rotation Bevel gears 22, 22' and workpiece mounting jigs 23, 23, 2 are attached to these rotating shafts 19, 19'.
Workpiece 24 attached via 3', 23',
24, 24', 24' are adapted to rotate. Although not shown, the polishing tank 1 can be moved vertically by, for example, the mechanism described in Japanese Patent Publication No. 37-17646 or any other suitable mechanism, and is similar to the polishing tank 1 shown in FIG. At the upper limit position, the works 24, 24, 24', 24' are placed in the polishing tank 1.
At the same time, the workpiece 2 is embedded in the media 2 inside the polishing tank 1, and at the lower limit position of the polishing tank 1.
4, 24, 24', 24' are taken out from the medium 2, and the works 24, 24, 24', 24' are attached and detached. Next, a method of dry high-speed fluid polishing of a workpiece using the polishing apparatus described above will be explained. First, the polishing tank 1 is moved to the lower limit position, and the fabric media 2 is put into the polishing tank 1. In this case, organic media, especially wood media, such as granular and powdered wood chips, small wood chips, corn, nuts, bark, etc., are excellent as the media, and the amount of media input is 60 to 90% of the polishing tank capacity. % is suitable. Next, an abrasive in the form of liquid, paste, or powder made by mixing oil and fat with abrasive grains is added to the media 2, and the workpiece mounting jigs 23, 2 are
3, 23', 23', and move the polishing tank 1 to the upper limit position with no workpiece attached to the spindle 17 by driving the drive source M connected to the pulley 6 to rotate the pulley 6. ,1
Rotate (revolution and rotation) 7' etc. As a result, the media 2 flows, the media 2 and the abrasive are uniformly mixed, and the abrasive is attached to the surface of the media 2. In this case, the amount of abrasive added is 40 to 80 g per 1 kg of media at the beginning of the work, and then 0.2 to 1 g per 1 kg of media for each polishing operation.
The mixing time of the media and abrasive is preferably 3 to 5 minutes. Next, after stopping the driving of the drive source M and moving the polishing tank 1 to the lowering limit position, the workpiece mounting jig 23,
23, 23', 23' are the workpieces 24, 24, 24',
24' and move the polishing tank 1 to the raised position again (the state shown in FIG. 11). When the drive source M is driven in this state and the pulley 6 is rotated, the cylindrical shaft body 5 and the gearbox 4 are rotated together with this rotation.
The spindles 17, 17' attached thereto rotate (revolution) around the central axis of the shaft 5 (the axis of the fixed shaft 10), and along with this rotation (revolution), the spindles 17, 17' attached to the The first planetary gears 18, 18' mesh with the first fixed gear 13 and rotate (revolution) along it, causing the spindles 17, 17' to rotate. rotatably mounted rotating shafts 19, 19', bevel gears 22,
22', workpiece mounting jig 23, 23, 23', 2
3' and these mounting jigs 23, 23, 23', 2
Workpieces 24, 24, 24' attached to 3',
The spindles 17, 17' revolve and revolve together with the revolution and rotation of the spindles 17, 17'. Furthermore, along with the above-mentioned rotational movement, the rotational shaft 1
9, 19' rotates when the second planetary gears 20, 20' fixed thereto mesh with the second fixed gear 14 and rotate (revolution) along it, so they rotate (rotate) together with this rotation. ), therefore, upper bevel gears 22a, 22'a fixed to these rotating shafts 19, 19', these upper bevel gears 2
Lateral bevel gear 22 meshed with 2a and 22'a
b, 22b, 22'b, 22'b, and the workpiece mounting jig 23, 23, 23', 23' are fixed to the workpiece mounting jig 23. , 23, 23', 23' (in a direction perpendicular to the direction of rotation of the rotating shafts 19, 19'). Here, the driving of the drive source M is switched between forward and reverse directions at predetermined time intervals, thereby switching the above-mentioned rotation between forward and reverse directions at predetermined time intervals. Therefore, the works 24, 24, 24', 24' are
Rotates forward and backward (great revolution and small revolution) around the central axis of the cylindrical shaft 5 (the central axis of the fixed shaft 10) and the central axes of the spindles 17, 17',
Workpiece mounting jigs 23, 23 protruding perpendicularly to the axial direction of these spindles 17, 17',
For example, the workpieces 24, 24, 24', 24', and 24' in FIG.
The lower end of 24' is the workpiece mounting jig 23, 23, 2
As the parts 3' and 23' rotate, the position moves to the upper end, and the workpiece 2 relative to the spindles 17 and 17'
The relative positions of 4, 24, 24', and 24' gradually change. And work 24, 24, 2
During these rotations, 4' and 24' come into contact with the media that has been stirred into a fluid state by these rotations, and the surface of the media is polished by the action of the abrasive on the surface of the media. 24, 24, 2
4', 24' rotate around the central axis of the cylindrical shaft body 5 and the central axes of the spindles 17, 17', respectively, as described above, as well as workpiece mounting jigs 23, 23, 23', 23. By rotating around the axis of ' and changing the relative position with respect to the spindles 17, 17', the surface is uniformly polished. After polishing, the drive source M is stopped, the polishing tank 1 is moved to the lower limit position, the polished workpiece is removed, new abrasive is added to the media, and the above-described operations are repeated. In the polishing method described above, the rotational speed of the pulley 6, therefore the cylindrical shaft 5 and the gearbox 4, that is, the first planetary gears 18, 18' and the spindle 17,
The revolution speed of 17' is 50 rpm or more, preferably 50~
500rpm, especially 100-400rpm. Further, it is preferable that the rotational speed of the workpiece mounting jigs 23, 23, 23', 23' (therefore, the rotational speed of the workpieces 24, 24, 24', 24') is 1 rpm or more, preferably 1 to 200 rpm. . The above-mentioned polishing machine rotates the planetary gear along its axis at a speed of 50 rpm or more, thereby causing the spindle connected to the planetary gear to revolve and rotate, thereby removing the workpiece attached to the spindle. is rotated, and the dry media filled in the polishing tank is stirred by the rotation of the spindle and the workpiece, thereby causing the dry media to flow at high speed, and the workpiece is polished by the dry media flowing at high speed. However, the movement of the work is that it makes a large revolution around a fixed shaft integrally with the spindle, a small revolution around the spindle or rotating shaft, and further rotates around the work mounting shaft. In this way, the workpiece rotates together with the revolution and rotation of the spindle, and also rotates separately from the rotation of the spindle, and the relative position of the workpiece with respect to the spindle changes over time. The media hits the surface as evenly as possible, and the workpiece surface is evenly polished. Moreover, in this case, in this polishing device, the first planetary gears 18, 18' are more important than the first fixed gear 13.
By forming a large number of gears and using a relatively deep concave surface, for example, 5 to 100 mm deep, especially 10
For workpieces such as spoons and ladles with a diameter of ~50 mm, the entire surface including the concave surface can be polished satisfactorily without the inconvenience of leaving polishing residue on the concave surface. In this case, in order to effectively achieve such effects, the gear ratio between the first fixed gear 13 and the first planetary gears 18, 18' should be 1:1.2 to 1.2.
1:4, preferably 1:1.2 to 1:3, especially 1:1.5
~1:2.5. Furthermore, in the polishing method described above, the flow direction of the media near the inner circumferential wall of the polishing tank matches the direction of small revolution of the workpiece, so the flow of the media on the workpiece surface is smooth and the media can flow at high speed. The polishing surface gives a good finished surface with a striped pattern, and the entire workpiece can be uniformly polished, and the force required for the rotation and revolution of the spindle can be reduced, which allows the equipment to be made smaller and save labor. It is. In the above polishing method, the drive of the drive source M is switched between forward and reverse at predetermined intervals, thereby switching the rotational motion between forward and reverse. However, the present invention is not limited to this, and rotation in only one direction is possible. The polishing may also be performed by. However, from the point of view of uniform polishing, it is preferable to rotate in the forward and reverse directions.In this case, it is preferable to switch the forward and reverse rotation once every 2 to 5 minutes and reverse the rotation once every 2 to 5 minutes. 1st year of junior high school
It is preferable to do this twice. Furthermore, in the above-mentioned fluidized polishing method, an abrasive agent mixed with a small amount of oil and abrasive grains is added to the fabric medium as an abrasive material every cycle of polishing operation, and the surface of the media is coated with the abrasive agent during a preliminary operation. By coating the media, an abrasive can be added when the media loses its abrasive power, so there is no need to replace the entire media, and the overall operability is simplified. In this case, when coating the media with the abrasive, the spindle, etc., revolves and rotates to fluidize the media and mix the media and the abrasive evenly and reliably, and in this way, the spindle, etc. Since the abrasive agent promotes the action of coating the media with the abrasive, the coating of the abrasive on the media can be carried out easily and in a short period of time (usually 3 to 5 minutes). Moreover, according to such a polishing method, the media is coated with a new abrasive agent every cycle (one polishing operation), so that good polishing is achieved. Furthermore, by adopting this method, running costs are significantly reduced. However, instead of adopting this abrasive injection method, it is also possible to use a media whose surface is coated with oil and abrasive grains, and to replace the entire media when its abrasive power decreases. It is also possible to use a method in which a media coated with oil and abrasive grains is used beforehand, and the abrasive is then added. Note that conventionally known media, oils, abrasive grains, etc. can be used. For example, as oils and fats, animal and vegetable mineral oils, various fatty acids, waxes, metal soaps, and various resins are used, and as abrasive grains, alumina, silica, iron oxide, chromium oxide, alundum, WA, calcium carbonate, etc. are used. Can be used. Next, an experimental example will specifically show the effect when the number of gears of the planetary gear is larger than the number of gears of the fixed gear. Experimental example 1 A cylindrical spindle was not used as the spindle, and therefore a rotating shaft was not disposed within the spindle.
The following experiment was carried out using a dry flow polishing device that simply uses a columnar spindle and a workpiece is directly attached to the bottom of the spindle. In other words, the workpiece has a head depth of 15 mm and a major diameter of 45 mm.
mm, using a dessert spoon with a short diameter of 35 mm,
Two fixed gears with the diameter shown in the table below are placed opposite each other.
Using a device with a size of 1000 mm (total diameter of the entire gear) in which 2 planetary gears are meshed, 15 spoons (30 spoons in total) are placed on each spindle attached to the center of the 2 planetary gears. ) Each spoon was installed vertically with the head facing downward, and the planetary gear (spindle) was rotated at a revolution speed of 360 rpm, and the polishing time was 4 minutes in both forward and reverse directions, for a total of 8 minutes. In this case, the spindle is placed closer to the inner wall of the polishing tank.
They were installed so that they were 200mm apart. In addition,
The polishing tank in the example is 1000, and the media (approximately 3
80% of the volume of the abrasive tank (mm diameter cone) and 3 kg of abrasive mixed with mixed oil and alumina.
The media was coated with abrasive by a preliminary run prior to the polishing operation. In addition, the comparative examples also used media and abrasives in similar proportions. The results are shown in Table 1.

[Table] The above polishing results are shown in FIGS. 7 to 9. In these drawings, hatched areas indicate polished areas, and unshaded areas indicate unpolished areas. From these results, when the fixed-planetary gear ratio was 7:1, only about 15 to 20% of the concave surface was polished (Fig. 9), and when the ratio was 3:1, there was also some unpolished portion at the bottom of the concave surface (Figure 9). (Fig. 8), but in the case of 1:2, the entire concave surface was well polished (Fig. 7). In addition, as a result of conducting the same experiment as above with a fixed-planetary gear ratio of 1:1, the polishing condition for the concave surface of the workpiece was improved compared to the condition shown in Fig. 8.
There was still some polishing left at the bottom of the concave surface. Also, when the fixed-planetary gear ratio is 1:5,
The polishing conditions for the workpiece were similar to those shown in Figure 7 (almost the same as in the case of a fixed-planetary gear ratio of 1:2), but as the planetary gear ratio increases, the driving energy increases, and a horsepower of 20 HP or more is required. It became. Therefore, as is clear from the above, according to the present invention, the polishing finish on the concave surface of the workpiece can be greatly improved, and the driving energy can be reduced. In this case, in the present invention, the planetary gear diameter is larger than the fixed gear diameter, and the rotation speed is therefore small.
It is less susceptible to resistance from the media and does not destroy the fluidized layer of media created by the revolution.
That is, the media is less likely to be thrown off by the rotation of the workpiece, and the contact time of the media with the workpiece is relatively long. Therefore, the media can reliably contact the bottom of the concave surface of the workpiece, and the bottom can be polished well, and as mentioned above, it is less susceptible to resistance from the media, so the overall driving energy can be reduced. It is. On the other hand, in the comparative example, the planetary gear diameter is small compared to the fixed gear diameter, and therefore the rotation speed is very high, so the workpiece receives large resistance from the media, and this resistance partly increases the polishing speed. However, most of the force acts as a reaction force to scatter the work media, causing the media to be blown away and destroying the fluidized layer of the media due to the revolution, and the contact time of the media to the work to be extremely short. Since the contact of the media against the bottom of the concave surface is poor, the bottom of the concave surface cannot be polished sufficiently, and the driving energy also increases as the rotation speed increases, and the resistance of the media against the work increases, so the overall amount increases. . Here, in the present invention, the revolution number is set to 50 rpm or more, but the revolution number affects the speed at which the abrasive media flows along the inner circumferential wall of the abrasive layer, and if the revolution number is 50 rpm or more, the media rotates at high speed, increasing the density on the peripheral wall of the polishing tank, increasing the contact pressure with the workpiece, and enabling short-time polishing. However, if the revolution number is lower than this, the flow speed of the media decreases, the density of the inner circumferential wall of the polishing tank does not increase much, and the contact pressure with the workpiece decreases significantly, causing a problem that the polishing force decreases. Therefore, according to the present invention, by setting the revolution speed to 50 rpm or more, the flow speed of the media is increased and the density of the flow is increased, and by making the number of planetary gears larger than the fixed gears and reducing the rotation speed,
The fluidized bed of the media due to the above revolution is less likely to be destroyed, and the media reliably contacts the concave surface of the workpiece for polishing, so as mentioned above, the concave surface of the workpiece can be polished to a good finish, and driving energy can be reduced. It is something to do. Next, we will show an experiment on the effect of this number of revolutions. Experimental Example 2 The operation was carried out in the same manner as in Experimental Example 1 described above (fixed-planetary gear ratio 1:2), except that the planetary gear revolution speed was varied in the range of 20 to 60 rpm as shown in Table 2. , instead of a spoon as a workpiece
Using a 1-inch diameter SUS304 pipe cut into 100 mm pieces, the polished finish of the workpiece was visually observed and the weight loss (average) was measured. The results are shown in Table 2.

[Second example]

FIG. 2 shows another embodiment of the device of the present invention. In this embodiment, a first fixed gear 13 and first planetary gears 18, 18' that mesh with the first fixed gear 13 are disposed inside the gear box 4, The second fixed gear 14 and the second planetary gears 20, 20' that mesh with the second fixed gear 14 are arranged outside the gear box 4. That is, the gearbox 4 is not provided with a partition wall, and the upper bearings 16, 16' which rotatably support the cylindrical spindles 17, 17' are fixed to the upper wall 4a of the gearbox 4, and the upper bearings 16, 16', which rotatably support the cylindrical spindles 17, 17', are fixed to the upper wall 4a of the gearbox 4. The upper end portions of rotating shafts 19, 19', which are rotatably disposed, pass through the upper bearings 16, 16' and protrude upward, and second planetary gears 20, 2 are attached to the protruding upper end portions.
0' is fixed, and a ring-shaped second fixed gear 14
is fixed to the lower part of the cylindrical shaft body 5, and the second planetary gear 2
0,20'. In addition, gear cases 21 and 2 are provided at the lower ends of the rotating shafts 19 and 19'.
The spur gears 26a, 26'a housed in the shaft 1' are fixed, and the spur gears 26b, 26b, 26'b, 26'b are meshed with the spur gears 26a, 26'a, respectively. , 19' in the same direction as the axial direction of the workpiece mounting jigs 23, 23, 23', 2.
3' is fixed. In the embodiment shown in FIG. 2 as well, the works 24, 24, 24', 24' are
It rotates around the central axis of the cylindrical shaft 5 (the central axis of the fixed shaft 10) and the central axes of the spindles 17, 17', and due to the rotation of the shaft 5, the second shaft fixed to the shaft 5 rotates. The second planetary gears 20, 20' meshing with the fixed gear 14 rotate (rotate), and together with this, the rotating shafts 19, 19' and the spur gears 26a, 26'a fixed to these rotate. Spur gear 26 meshed with gears 26a and 26'a
b, 26b, 26'b, 26'b, and workpiece mounting jigs 23, 23, 23', 2 fixed to these.
3' rotates, so the works 24, 24, 24',
24' is the workpiece mounting jig 23, 23, 23', 2
3', the spindle 17,
The relative position with respect to 17' is gradually changed. Therefore, in the embodiment shown in FIG.
4, 24, 24', and 24' are polished uniformly. [Third Embodiment] FIG. 3 shows another embodiment of the present invention. In the device according to this embodiment, the second fixed gear and the second planetary gear are not provided, and the rotating shaft 19, 19'
A motor 27, 2 such as a gear motor is attached to the protruding upper end of the
7' is directly attached and the rotating shafts 19, 19' are rotated separately from the rotational movement based on the drive of the drive source M, so that the works 24, 24, 24', attached to these rotating shafts 19, 19', 24' is rotated to change the relative position with respect to the spindles 17, 17'. In this case, a speed reduction device may be provided in connection with the motors 27, 27'. Furthermore, in the embodiment shown in FIG.
3', 23' are directly attached, and works 24, 24, 24', 24' are removably attached to these workpiece attachment jigs 23, 23, 23', 23'. In addition, in the embodiment shown in FIG.
A ring-shaped pressure increasing cover body 30 having a triangular cross-section and having a horizontal part 28 and an inclined part 29 along the circumferential direction is provided at the lower end of the inner wall of the cylindrical box 3 so as to be removably attached by bolts or the like. By disposing the cover body 30, the media 2 near the inner circumferential wall of the polishing tank 1, which attempts to rise due to the agitation flow effect caused by the rotational movement described above, is prevented from rising beyond the cover body 30. As a result of the pressure increasing effect, the media 2 is brought into reliable pressure contact with the workpieces 24, 24, 24', and 24', and these workpieces can be polished better. Furthermore, in FIG. 3, 31 is an air blowing pipe and 32 is a dust collecting pipe. Air is introduced from the air blowing pipe 31 when necessary, and damaged dust particles and abrasive debris on the media are removed from the dust collecting pipe 3.
It is designed to be able to be discharged from 2. Note that the other configurations and effects in FIGS. 2 and 3 are the same as in the embodiment shown in FIG.
The same reference numerals as in FIG. 1 are given, and the explanation thereof will be omitted. Note that in the above embodiment, the number of spindles is 2.
However, the number of spindles is not limited. Further, in each of the above embodiments, the spindle rotating shaft is formed into a single integrated structure, but the present invention is not limited to this. For example, as shown in FIG. A two-shaft configuration including the shaft 19a and the lower rotating shaft 19b may be used, and these may be connected to each other. Further, in this case, the lower spindle 17b and the lower rotating shaft 19b can be connected to each other detachably. Furthermore, as shown in FIG. 5, fixed gears 13, 14 and planetary gears 18, 18', 20, 2
0' and intermediate gears 36, 36', 3, respectively.
7, 37' can also be engaged (in addition, the 5th
In the figure, shafts 40, 40' are fixed to the finishing wall 4b and upper wall 4a of the gear box 4, respectively, and are attached to the intermediate gears 36, 36', 37, 37', respectively. ,41,4
1'). Furthermore, various changes may be made to other configurations without departing from the gist of the present invention. [Effects of the Invention] According to the present invention, the workpiece rotates together with the revolution and rotation of the spindle, the workpiece also rotates separately from the rotation of the spindle, and the relative position of the workpiece with respect to the spindle changes over time. Because it changes,
The way the media hits the workpiece is made as equal as possible, and deflections such as the media hitting only a certain part of the workpiece strongly or more, or conversely the media hitting weakly or less often, are prevented as much as possible. The surface is evenly polished. Furthermore, by increasing the number of planetary gears than fixed gears and limiting the rotation speed of the spindle, rather than changing the posture of the workpiece at this point,
A workpiece having a relatively deep concave surface can be polished uniformly over the entire surface including the concave surface, the polishing finish of the concave surface of the workpiece can be greatly improved, and driving energy can be reduced. Moreover, by stirring the dry media filled in the polishing tank by the rotation of the spindle and the workpiece, the flow direction of the dry media near the inner circumferential wall of the polishing tank coincides with the small revolution direction of the spindle and the workpiece. Can be flowed at high speed,
This allows the media to flow smoothly over the workpiece surface, giving a good polished surface with a striped finish even when the media is flowing at high speed.The entire workpiece can be polished uniformly, and the rotation and revolution of the spindle The required force can be reduced, and therefore the device can be downsized and labor can be saved.

[Brief explanation of the drawing]

1 to 5 are schematic cross-sectional views showing one embodiment of the present invention, and FIG. 6 is a plan view illustrating the rotating state of a workpiece attached to a conventional spindle.
Figures 7 to 9 illustrate the polished state of the concave portion of the dessert spoon when the gear ratios of the fixed gear and the planetary gear are 1:2, 3:1, and 7:1, respectively, and A is the plane thereof. Explanatory drawing, B is a vertical cross-sectional explanatory drawing. 1... Polishing tank, 2... Media, 5... Shaft body,
10... fixed shaft body, 13... first fixed gear, 14
...Second fixed gear, 17, 17', 17a, 17
b... Spindle, 18, 18'... First planetary gear, 19, 19', 19a, 19b... Rotating shaft,
20, 20'...Second planetary gear, 23, 23'...
Workpiece mounting jig, 24, 24'...Workpiece,
27, 27'...Motor.

Claims (1)

[Claims] 1. A device comprising a fixed gear and a planetary gear that meshes with the fixed gear, and by rotating the planetary gear while revolving around the fixed gear at a speed of 50 rpm or more, a spindle connected to the planetary gear can be rotated and rotated. Rotate,
A dry high-speed dry polishing system in which the dry media filled in a static polishing tank is agitated by the rotation of the spindle to cause the dry media to flow at high speed, and the workpiece is polished by the abrasive agent attached to this high-speed flowing dry media. In the fluid polishing device, the number of gears of the planetary gear and the number of gears of the fixed gear are 1.2:1 to 4:1, and the spindle is formed into a cylindrical shape, and a rotating shaft can be rotated within the spindle. At the same time, a rotation mechanism for rotating this rotating shaft is provided, a workpiece mounting jig is provided at the lower part of the rotating shaft, and the workpiece is mounted on the workpiece mounting jig so that the workpiece can be attached to the revolution and rotation of the spindle. A dry high-speed fluid polishing apparatus characterized in that the workpiece is rotated together with the workpiece mounting jig that rotates together with the rotation of the rotating shaft. 2 Attach a second planetary gear to the rotating shaft, mesh the second planetary gear with the second fixed gear, and rotate the second planetary gear around the second fixed gear integrally with the revolution of the spindle. By rotating the second planetary gear while meshing with this, the second planetary gear is rotated,
The device according to claim 1, wherein the rotating shaft is rotated integrally with this rotation. 3. The device according to claim 1, wherein a motor is attached to the rotating shaft to rotate the motor.