JPH0248392B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention aims to improve the structure of a wrapping plate that performs wrapping processing, and more specifically, to extend the life of the wrapping plate by swinging and rotating the lower surface plate and the upper surface plate. Concerning a lap board designed to

(Prior Art) Wrapping is usually performed as a final finishing process, and therefore extremely high processing accuracy is required.
The lapping machine that performs this wrapping process is equipped with a lower surface plate and an upper surface plate that face each other so as to be rotatable, and a sun gear is rotatably arranged in the center and an internal gear is rotatably arranged around the sun gear. A carrier that holds the workpiece is engaged between the and the internal gear in the form of a planetary gear, and with all of the above-mentioned components rotated, a droplet of the rapi agent is applied by the lower surface plate and the upper surface plate. Perform wrapping processing.

However, in conventional lapping machines, the lower surface plate and the upper surface plate are positioned concentrically, and therefore, although the carrier rotates like a planetary gear, the movement trajectory of the workpiece is limited to a certain range. As a result, the upper and lower surface plates tended to wear out on one side (uneven wear).

Naturally, the wrapping processing accuracy is high,
It is determined by the accuracy of the lower surface plate,
The above-mentioned reduction in uneven wear occurs relatively early, and therefore the upper and lower surface plates must be corrected frequently. As is well known, in order to correct a surface plate, it is generally a hassle to prepare a separate lapping plate exclusively for correction, remove the surface plate to be corrected, transfer it to the lapping plate for correction, and then attach it to the original lapping plate again after the correction. These procedures are extremely expensive and result in increased wrapping costs.

In addition, Japanese Patent Application Laid-Open No. 155357/1983 discloses a lapping plate in which a surface plate is oscillated and rotated to prevent uneven wear. However, in this device, the mechanism for swinging and rotating is a structure in which the surface plate is attached to the rotating shaft via an eccentric ring and the surface plate and the rotating shaft are connected by an engaging/disengaging means, or a structure in which the surface plate is moved in the radial direction to the rotating shaft. A freely supported surface plate is disposed between the central sun gear and the surrounding internal gears, and a plurality of grooves meshing with the sun gear and the internal gears are provided in recesses provided on the side of the surface plate. In the former case, the number of parts increases because the structure uses an eccentric gear.
On the other hand, in the latter case, there is only one point at which each gear meshes, and in either case there is a problem that assembly becomes troublesome.

(Object of the Invention) In view of the problems of the prior art described above, the present invention can eliminate uneven wear of the upper and lower surface plates, thereby greatly contributing to extending the life of the upper and lower surface plates and reducing wrapping costs. The purpose is to provide a lap board with excellent assemblability.

(Structure of the Invention) The above object is to support a lower surface plate and an upper surface plate that are arranged opposite to each other on independent rotating shafts, and also to support a surrounding internal gear arranged between the upper and lower surface plates and a central sun gear. and are supported on independent rotating shafts, and a workpiece supported by a carrier meshing with both gears is sandwiched between the upper and lower surface plates and wrapped. The lower surface plate is supported movably in the radial direction, and an eccentric ring and a bearing are interposed between the inner periphery of the lower surface plate and the rotating shaft of the sun gear, and the inner periphery of the upper surface plate and the rotating shaft thereof are This is achieved by a lap plate in which an eccentric ring and a bearing are interposed, and a gear is formed on the outer periphery of the upper surface plate so that the gear partially meshes with the internal gear. .

That is, according to the present invention, both the lower surface plate and the upper surface plate have eccentric rotational axes, so that they swing and rotate during wrapping. Furthermore, the lower surface plate can be oscillated and rotated simply by supporting the lower surface plate on the corresponding rotating shaft and attaching it to the rotating shaft of the central sun gear via an eccentric ring and a bearing. Movement and rotation are achieved by simply supporting the upper surface plate on the corresponding rotating shaft via an eccentric ring and a bearing, and partially meshing the gear on its outer periphery with the internal gear. Assembly is easy.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

FIG. 1 shows the main structure of a lap board according to the present invention. In the figure, reference numeral 1 denotes a lapping board main body, and the lapping board main body 1 includes a hollow first rotating shaft 2 that connects to a motor (not shown), a hollow second rotating shaft 3, and a hollow second rotating shaft 3. The third rotating shaft 4 and the fourth solid rotating shaft 5 are attached in an overlapping state so as to be rotatable with each other. A receiving plate 6 is integrally provided at the upper end of the first rotating shaft 2, and an internal gear 7, which is formed wider than conventionally, is fixed thereon with bolts 8. On the other hand, a sun gear 10 is attached to the third rotating shaft 4 in the center, facing the internal gear 7, and whose rotation is regulated by a key 11.

Further, a support base 12 is integrally provided at the upper end of the second rotating shaft 3, and a lower surface plate 13 is placed on this support base 12. As shown in FIG. 2, the lower surface plate 13 is ring-shaped and has a wrapping surface 13a having shallow lattice grooves formed on its upper surface. A bearing 14 is fitted to the inner peripheral portion 13b of the lower surface plate 13 via an outer ring 14', and an eccentric ring 15 is further fitted to the bearing 14. The eccentric wheel 15 is also located below the sun gear 10 and, like the sun gear 10, is attached to the third rotating shaft 4 so that its rotation is restricted. On the other hand, a pin 16 is protruded from the lower surface of the lower surface plate 13, and is loosely fitted into a hole 12a formed in the support base 12.

That is, the lower surface plate 13 is mounted eccentrically and rotatably with respect to the third rotation roller 4, and is allowed to move in the radial direction with respect to the support base 12. As a result, the second
When the rotating shaft 3 rotates counterclockwise as shown by the arrow A, the lower surface plate 13 rotates together with the support base 12 around the third rotating shaft 4 as shown by the arrow A, and moves in the radial direction by twice the amount of eccentricity. It will begin to oscillate (see Figure 2).

17 is a ring-shaped upper surface plate provided opposite to the lower surface plate 13, and has a wrapping surface 17a formed on its lower surface. As shown in FIG. 3, an outer ring 18 is fitted into the inner circumference 17b of the upper surface plate 17, and an eccentric ring 20 is further fitted to the outer ring 18 via a bearing 19. There is. The eccentric wheel 20 is fixed to the upper end of the fourth rotating shaft 5 with bolts 21. The upper surface plate 17 is formed to have a smaller diameter than the internal gear 7, and has a gear portion 2 on its outer periphery.
It is equipped with 2. The gear portion 22 is partially meshed with the internal gear 7 while being attached to the fourth rotating shaft 5 via the eccentric ring 20 and the like.

As a result, when the first rotating shaft 2 and the internal gear 7 rotate counterclockwise as shown by arrow B, the upper surface plate 17 rotates as shown by arrow C due to the difference in the number of teeth from the internal gear 7. It rotates counterclockwise and at the same time swings in the radial direction by twice its eccentricity (see Figure 3).

Note that 23 is a carrier that meshes with the internal gear 7 and the sun gear 10, 24 is a workpiece held by the carrier, and the carrier 23 is connected to the lower surface plate 13 and the upper surface plate 1.
A plurality of internal gears are provided in the circumferential direction between the internal gear 7 and the sun gear 10, and due to the mutual reverse rotation of the internal gear 7 and the sun gear 10, each rotates on its own axis and rotates around the sun gear 10.

With such a configuration, the lower surface plate 13 is placed in advance on the outer ring 1.
It is attached to the third rotating shaft 4 via a 4' bearing 14 and an eccentric ring 15, and positioned on the support plate 12.
When lapping, first the carrier 2
3 is meshed with and attached to the internal gear 7 and the sun gear 10, and the workpiece 24 is held on the carrier 23. Next, the upper surface plate 17, on which the outer ring 18, bearing 19, and eccentric ring 20 are fitted in advance, is attached to the fourth rotating shaft 5, and its gear portion 22 is meshed with the internal gear 7. At this time, an appropriate pressing force is applied to the workpiece 24.

Then, when the motor is driven while supplying the wrapping agent from the supply means (not shown), the rotating shafts 2
5 rotate in a predetermined direction, and following this rotation, the lower surface plate 12 and the upper surface plate 17 swing and rotate in the radial direction. On the other hand, the carrier 23 also rotates on its own axis and rotates around the sun gear 10, but since the lower surface plate 13 and the upper surface plate 17 are oscillatingly rotating, the workpiece 24
comes into sliding contact with almost the entire surface of the lower surface plate 13 and the upper surface plate 17, and a highly accurate wrapping process is performed during this time.

However, as mentioned above, the workpiece 24 is
3 and the upper surface plate 17, the surface plates 13 and 17 wear uniformly without being worn out unevenly, thereby extending their life as much as possible. .

(Effects of the Invention) As explained in detail above, the lapping machine according to the present invention is constructed by attaching the lower surface plate and the upper surface plate so as to be able to swing and rotate, and thereby, the workpiece can be Since it comes into sliding contact with the entire surface of the surface plate, the surface plate no longer wears unevenly. As a result, the life of the surface plate was extended as much as possible, and the number of corrections was accordingly reduced, resulting in a significant reduction in wrapping costs.

Moreover, the swinging/rotating mechanism is simple and easy to assemble, and the number of parts is small, making it highly useful.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the structure of the main parts of the lapping plate according to the present invention, Fig. 2 is a plan view showing how the lower surface plate is installed, and Fig. 3 is a plan view showing how the upper surface plate is installed. be. 2 to 5...Rotating shaft, 7...Internal gear, 12...
Support stand, 13...Lower surface plate, 17...Upper surface plate, 1
4, 19... Bearing, 15, 20... Eccentric wheel.

Claims (1)

[Claims] 1. A lower surface plate and an upper surface plate arranged opposite to each other are supported on each independent rotating shaft, and the surrounding internal gears and the central sun gear arranged between the upper and lower surface plates are supported on each independent rotating shaft. In the lapping machine, the workpiece supported by a carrier meshing with both gears is sandwiched between the upper and lower surface plates for lapping, and the lower surface plate is supported on its rotating shaft so as to be movable in the radial direction. An eccentric ring and a bearing are interposed between the inner periphery of the lower surface plate and the rotating shaft of the sun gear, and an eccentric ring and a bearing are interposed between the inner periphery of the upper surface plate and the rotating shaft. 1. A lapping board characterized in that a gear is formed on the outer periphery of the upper surface plate, and the gear is partially meshed with the internal gear.