JPH0357417Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a flat surface polishing device for precision processing both the front and back surfaces of a workpiece at the same time, such as wrapping, polishing, and grinding.

Prior Art A conventional polishing device of this type has a carrier meshed between a rotating internal gear and a sun gear, and the workpiece held by the carrier is processed by upper and lower surface plates. However, since such a polishing device uses a carrier to hold the workpiece, it requires not only the carrier but also an internal gear, a sun gear, and related parts to drive it, and the structure is poor. At the same time, the loading and unloading of workpieces is complicated and requires a great deal of effort.

In order to automate the loading and unloading of workpieces, it is necessary to grip the carrier and the workpiece at the same time or separately, which makes the gripping mechanism and its control mechanism complicated, and it is difficult to automate it with a simple configuration. Have difficulty. Moreover, if the workpieces (carriers) are taken out and loaded one by one, as seen in the known automatic workpiece changer disclosed in JP-A No. 55-48573, for example, it takes time to change the workpieces (carriers) one by one. During this time, polishing is interrupted, which is inefficient.

Problems to be Solved by the Invention The present invention enables double-sided machining of a workpiece without using a carrier, thereby simplifying the structure of the polishing device, and simplifying the automation of loading and unloading of the workpiece. The challenge is to make it possible to achieve this efficiently with the structure.

Means for Solving the Problems In order to solve the above problems, the surface polishing device of the present invention consists of a large number of circularly arranged horizontally arranged circular plates at regular intervals, which are arranged to be forcibly rotated by a drive source. Annular upper and lower surface plates that clamp and process workpieces in an offset position protruding from the processing surface, and rotatable guide rings that contact the sides of the workpieces and support each workpiece in a fixed position. and a guide roller, a tray for taking out processed workpieces, which is disposed so as to be rotatable by a constant pitch at a position concentric with the surface plate, and has the same number of workpiece accommodating parts as the workpieces in a circumferential shape, and a tray for taking out processed workpieces, which is arranged concentrically with the surface plate. A tray for distributing unprocessed workpieces is arranged so as to be rotatable at a constant pitch, and has the same number of workpiece accommodating parts as the above-mentioned workpieces in a circumferential shape. A number of works equal in number to the number of workpieces to be grasped and stored in the processed workpiece take-out tray, and to be loaded into the processing position by grasping the unprocessed workpieces accommodated in the unprocessed workpiece distribution tray. A gripping arm and a workpiece carrying/unloading unit that carries out the processed workpieces stored in the respective housing sections of the processed workpiece retrieval tray, and carries the unprocessed workpieces into the respective housing sections of the unprocessed workpiece distribution tray. The invention is characterized in that it is configured as having a mechanism.

Effect When the upper and lower surface plates are rotated in the same direction while holding a workpiece, the workpiece will rotate in accordance with the direction of rotation of the surface plate because it is held between the surface plates in an offset position. is given, and the workpiece is machined while rotating in a fixed position while being supported by a guide ring and guide rollers.

When the processing is completed and the surface plate stops, the gripping parts of each gripping arm simultaneously grasp the workpieces that are sandwiched between the upper and lower surface plates, and after the upper surface plate rises, the workpieces are removed. It is lifted and stored in the storage section of the processed workpiece take-out tray. continue,
The gripping arm grips and holds the unprocessed workpiece placed on the unprocessed workpiece distribution tray, and loads the unprocessed workpiece into a predetermined position on the lower surface plate. When this loading is completed, the upper surface plate descends, clamps the workpiece, and begins machining the workpiece.

While the workpiece is being processed, the two trays rotate one pitch at a time, and the unloading/unloading mechanism unloads the processed workpieces stored in each storage section of the processed workpiece take-out tray. , and the unprocessed work is carried into each storage section of the unprocessed work distribution tray.

Effects: Since there is no need to use a carrier to support the workpiece, the internal gear and sun gear for driving the carrier, as well as the related drive sources and power transmission mechanisms, etc., can all be omitted. By holding the workpiece in an offset position and protruding from the machining surface between the upper and lower surface plates, the workpiece is rotated naturally using machining force, so the workpiece is not forced to rotate. There is no need to provide a rotating mechanism or the like, and as a result, the configuration of the device can be much simpler and more compact than conventional double-side polishing devices.

Furthermore, by eliminating the need for a carrier, when loading and unloading a workpiece, there is no need to grasp the carrier and the workpiece at the same time and replace them together, as was the case in the past, but only the workpiece can be grasped and replaced. When positioning a workpiece, there is no need to detect the revolution position and rotation angle at the same time as in the case of using a carrier, and only the revolution position needs to be detected, so a simple gripping mechanism and control mechanism can be used. The automation device provided can realize automation of workpiece loading and unloading.

In addition, a tray for taking out unprocessed workpieces and a tray for distributing unprocessed workpieces each having the same number of workpiece accommodating parts as the workpieces are provided, and workpiece gripping arms for the same number of workpieces are provided, and these gripping arms and trays allow processing Since the workpieces are taken out and the unprocessed workpieces are loaded all at once, the workpiece removal and loading operations, which conventionally required a great deal of effort and time, can be carried out efficiently in a short time.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In FIGS. 1 and 2, 1,
1, ... are disk-shaped workpieces with a large number of holes arranged circumferentially and horizontally at regular intervals, and 2, 3 are annular upper and lower surface plates for simultaneously processing both sides of the workpiece 1. And these surface plates 2 and 3 are
The surface plates 2, 3 are connected to a drive source (not shown) through concentric drive shafts 4, 5, and are forcibly rotated at arbitrary speeds and directions by the drive source. Machining surfaces 2a, 3a in
The width W of the workpiece 1 is formed to be smaller than the radius of the workpiece 1, and when the workpiece 1 is shifted to one side, both machining surfaces 2
The workpiece 1 is held in a protruding state between a and 3a, and the workpiece 1 is processed in that state.

Inside the surface plates 2 and 3, a guide ring 6 that comes into contact with and supports the side surface of the workpiece 1 is rotatably disposed by being supported by the drive shaft 5 via a bearing 7. Around the plates 2 and 3, a large number of guide rollers 8, 8, . They are arranged in a circumferential manner at regular intervals by being rotatably supported by each of them.

The upper surface 8a of the guide roller 8 has an outwardly downwardly tapered surface in order to reduce the contact area with the workpiece 1, and each of the guide rollers 8, 8, . . .
The arrangement interval is set to such a size that the workpiece 1 does not come into contact with two adjacent guide rollers 8, 8 at the same time during machining. Therefore, the support of the workpiece 1 during processing is performed by the guide ring 6 and the guide roller 8 located on the rotational direction side of the surface plates 2 and 3.

A support frame 16 is attached to a shaft rod 15 vertically supported by a support 14 on the center line of the surface plates 2 and 3 so as to be vertically movable via an elevating mechanism 17.
6, the same number of workpiece gripping arms 1 as the workpieces 1 above.
8 is rotatably suspended around the surface plates 2 and 3 at regular intervals, and a workpiece gripping portion 19 is provided at the lower end of the gripping arm 18. As is clear from FIGS. 3 and 4, this gripping part 19 is provided with fixed claws 21, 21 and a movable claw 22 that can move forward and backward by a cylinder 23 on a base plate 20, and has a center hole in the workpiece 1. The outer edge of the workpiece and the edge of the center hole 1a are held between these claws 21 and 22 by using the outer edge of the center hole 1a.

The elevating mechanism 17 of the support frame 16 includes a threaded cylinder 24 rotatably mounted on the shaft rod 15, and a threaded cylinder 24 rotatably mounted on the shaft rod 15.
4, a screw ring 26 that is fixedly attached to the support frame 16 and meshes with the threaded cylinder 24, and a rotation stopper 27 for the support frame 16.

Furthermore, in order to rotate the gripping portions 19 in and out by rotating each of the gripping arms 18, sprockets 28 are fixed to the upper ends of the gripping arms 18, respectively, and endless chains 29 are connected to these sprockets 28. The chain 29 can be driven in forward and reverse directions by a motor 30.

Further, at the lower end of the shaft rod 15, there is provided an annular processed workpiece retrieval tray 31 for temporarily storing the processed workpiece taken out from the processing position by the gripping arm 18, and a tray 31 for taking out the processed workpiece that is loaded into the processing position. An annular raw work distribution tray 32 for grasping and distributing raw work to be processed to the arm 18 is rotatably attached. These trays 31, 32
is equipped with the same number of workpiece accommodating parts 34 and 35 as the workpieces 1 in a circumferential manner at regular intervals,
These trays 3 are arranged at intervals above and below.
1 and 32 are integrally connected by a connecting member 33,
An internal gear 3 is mounted on the upper surface of the tray 31 located above.
6, and a driving motor 37 for the internal gear 36.
is attached to the shaft 15, and the motor 37 is configured to drive both trays 31, 32 at a constant pitch (for example, θ°). Each accommodating portion 34 in the tray 31 for taking out processed workpieces is filled with water in order to prevent the taken out processed workpieces from drying out.

In addition, in order to ensure that the workpiece is gripped by the gripping arm 18, the storage section 35 in the unprocessed workpiece distribution tray 32 is configured as shown in FIG.
It is desirable to have a structure in which a notch 42 is provided in the outer wall.

Further, on one side of the machine stand 9, there is a workpiece for carrying out the processed workpieces accommodated in the processed workpiece retrieval tray 31 and carrying in the unprocessed workpieces to the unprocessed workpiece distribution tray 32. Carrying in/out mechanism 3
There are 8. This carry-out/carry-in mechanism 38 is a second
As is clear from the figure, a horizontal arm 4 which is movable up and down and can be moved back and forth by a driving means such as a cylinder is attached to a body 41 that is rotatably disposed in the center of a table 40.
2, and a workpiece gripping part 43 configured similarly to the gripping part 19 of the gripping arm 18 is provided at the tip of the horizontal arm 42. Cassettes 44a and 44b that can be stored in the machine body 41 are arranged around the machine body 41, and the processed workpieces carried out from the processed workpiece take-out tray 31 are stored in the cassette 44a, and the unprocessed workpieces stored in the cassette 44b are stored in the cassette 44a. The workpiece is carried into a tray 32 for distributing unprocessed workpieces.

In the surface polishing apparatus having the above configuration, the first
If the upper surface plate 2 is lowered from the state shown in the figure, and the workpiece 1 is held between the upper and lower surface plates 2 and 3, these surface plates are rotated at a constant speed in the direction shown by arrow a in FIG. 2. Since each workpiece 1 is held in an offset position by the surface plates 2 and 3, rotation in the direction typically shown by arrow b is applied to the workpiece 1.
is brought into contact with the guide ring 6 and the guide roller 8 located on the side in the rotational direction of the surface plates 2 and 3, and both surfaces are simultaneously processed while rotating at a fixed position due to the subordinate rotation of the guide ring 6 and guide roller 8. be done. At this time, the workpiece 1 is pressed against the lower surface plate 3 by the upper surface plate 2, but if the workpiece 1 is lightweight such as a thin aluminum plate, its weight can be almost ignored. It is considered that substantially equal machining pressure is applied to both sides of the workpiece 1, and therefore both sides of the workpiece 1 are machined under substantially the same conditions.

When the processing of the workpiece 1 is completed and the surface plates 2 and 3 are stopped, the screw cylinder 24 is driven by the motor 25,
Each gripping arm 18, which was waiting at the upper limit position, descends to a position slightly above the workpiece take-out position. Then, the gripping part 19 is rotated by the drive of the gripping arm 18 by the motor 30, and with the movable claw 22 facing the center of the workpiece 1, the workpiece is held between the fixed claws 21, 21 and the movable claw 22. After the gripping arm 18 is lowered to a position where the movable claws 22 and the fixed claws 21, 21 are moved back by the cylinder 23, the workpiece 1 is gripped and held between the movable claws 22 and the fixed claws 21, 21. (FIG. 3) When the gripping arm 18 grips the workpiece, the upper surface plate 2 rises, and then the gripping arm 18 rises slightly to lift the workpiece 1 as shown in FIG. Pivot outward. Then, the gripping arm moves up to the position of the tray 31 for taking out the processed workpiece, and at that position, the gripping section 19 rotates again and stores the gripped processed workpiece in the storage section 34.

Thereafter, the gripping arm 18 descends slightly, similarly grips the unprocessed workpiece accommodated in the housing portion 35 of the unprocessed workpiece distribution tray 32, and loads it into the processing position on the lower surface plate 2. When the loading of this unprocessed workpiece is completed, the upper surface plate 2 is lowered to start processing the workpiece, and the gripping arm 18
returns to the position shown in FIG.

While the workpiece is being processed, the motor 3
7 intermittently drives the trays 31 and 32 one pitch (θ°) at a time, and the machined workpiece placed on the machined workpiece take-out tray 31 is picked up by the carrying-out/carrying mechanism 38 and placed in the cassette 44a. At the same time, the unprocessed workpieces stored in the other cassettes 44b are carried into the unprocessed distribution tray 32, and when they are completed, the tray 31,
32 stops and takes a standby position.

When taking out the processed workpiece mentioned above, it is necessary to grab the workpiece that stops at an arbitrary position and adjust the position so that it comes to the corresponding position with the arm 18.
The position of the workpiece at this time can be detected by electrical means such as a limit switch or proximity switch, or optical means using a photoelectric element. If the upper surface plate 2 is raised after being grasped, it is possible to reliably prevent the workpiece from adhering to the upper surface plate 2 and being lifted.

Therefore, when the workpiece is taken out and loaded, the workpiece is held between the surface plates 2 and 3 at a position away from the center of the workpiece. This can be easily done with the claws 21 and 22 by using the center hole 1a, at least half of which is exposed on the outside of the holes 2 and 3.

Incidentally, the above-mentioned surface plates 2 and 3 can also be rotated in the opposite direction to the case shown in FIG. 2, and such reversal of the surface plates allows dressing of pads to be performed at the same time, especially when performing polishing. Therefore, it is effective.

[Brief explanation of the drawing]

1 and 2 are a longitudinal sectional view and a sectional view taken along the line A-A of an embodiment of the present invention, FIG. The figure is the same side view. 1... Workpiece, 2, 3... Surface plate, 2a, 3a...
...Machining surface, 6...Guide ring, 8...Guide roller, 18...Gripping arm, 19...Gripping part, 3
1... Tray for taking out processed workpieces, 32... Tray for distributing unprocessed workpieces, 34, 35... Storage section,
38... Carrying in/out mechanism.

Claims (1)

[Claims for Utility Model Registration] A large number of disc-shaped workpieces arranged so as to be forcibly rotated by a driving source and arranged circumferentially and horizontally at regular intervals, protruding from the machining surface in an offset position. Annular upper and lower surface plates that are clamped and processed, rotatable guide rings and guide rollers that contact the sides of the workpieces and support each workpiece in a fixed position, and rotate at a constant pitch at a position concentric with the surface plate. A tray for taking out processed workpieces, which is arranged so that it can be rotated by a constant pitch at a position concentric with the surface plate, and which has the same number of workpiece storage sections as the above-mentioned workpieces in a circumferential shape; A tray for distributing unprocessed workpieces with a circumferential workpiece storage area, and a tray that can be raised and lowered at regular intervals around a surface plate.
The number of workpieces that have been processed is grabbed and stored in the processed workpiece take-out tray, and the same number of workpieces as the unprocessed workpieces that are stored in the unprocessed workpiece distribution tray are loaded into the processing position. a workpiece gripping arm, and a workpiece that carries out the processed workpieces stored in each storage section of the processed workpiece retrieval tray and carries the unprocessed workpieces into each storage section of the unprocessed workpiece distribution tray. A flat surface polishing device comprising: a discharge/carry-in mechanism;