JPH0373425B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a surface polishing device such as a lapping polisher that grinds or polishes an object to be polished by bringing it into contact with the surface of a solid whetstone and by the action of the solid whetstone. It is something.

[Conventional technology]

Conventionally, when attaching a solid grindstone to a wrapping polishing machine, the common method was to apply an adhesive, hot melt, etc. to the surface of a metal surface plate that rotates in the circumferential direction, and then adhere the solid grindstone.

[Problem that the invention seeks to solve]

However, with this method, it is quite difficult to attach the grinding wheel to the surface of the large lapping surface plate without removing it from the polishing machine, so the adhesive force may be weak or some parts may not be bonded. Because of this, complete adhesion was not possible, resulting in problems such as peeling and falling off during polishing work. In addition, it was extremely difficult to replace a damaged grindstone. This tendency was particularly noticeable when the type of polishing machine was a double-sided wrapping polishing machine in which two wrapping disks were combined with their abrasive surfaces facing each other. Furthermore, if all the whetstones are used up during polishing work and a new one is installed,
It is necessary to completely peel off any remaining grindstone pieces, adhesive, etc. on the surface of the wrapping surface plate, and cleanse the surface uniformly before mounting it.In order to perform this work on the entire surface of a large surface plate, , it is necessary to disassemble the equipment and remove the surface plate, which is an extremely large-scale work that requires a lot of effort and time, resulting in a significant decrease in operating efficiency and an increase in operating costs. was inviting.

On the other hand, when a solid grindstone of the same size is mounted on a large circular wrapping surface plate, problems may occur due to uneven mixing of the grinding wheel materials, uneven hardening, and uneven roughness of the grinding wheel surface during the production of the solid grindstone. In view of the fact that it is not possible to obtain a large, homogeneous solid grindstone, a proposal has been made to divide the large solid grindstone into a plurality of pieces and attach them to each section (Utility Model Application Publication No. 57-18954). However, this device simply miniaturizes a large solid grindstone.
These are combined and glued to a steel plate of the same size as the large solid grindstone, and this steel plate itself is fixed to the wrapping surface plate with screws, etc., and each small grindstone cannot be freely removed, so some parts It has the disadvantage that even if it is damaged, only the damaged part cannot be replaced. In addition, since the outer circumferential side of the grinding wheel surface of a solid whetstone is often worn, the hardness of the small grindstone corresponding to the outer circumferential side is made higher than that of the inner circumferential side.As a result, it is necessary to manufacture small whetstones with two different hardnesses. However, there are problems in that the manufacturing is complicated and the product cost is also high.

This invention was made in view of these circumstances, and it is possible to easily replace only the worn or damaged part of the grindstone, and prevent uneven wear on the outer circumference of the solid grindstone without causing problems such as complicated manufacturing. The purpose is to provide a flat surface polishing device that can perform the following steps.

[Means for solving problems]

In order to achieve the above object, the surface polishing device of the present invention is a surface polishing device equipped with a wrapping disk having a structure in which a solid grindstone is attached to a wrapping surface plate in the shape of a circular disk or an annular disk. A mounting plate having approximately the same shape as the wrapping surface plate is interposed between the grinding wheels, and this mounting plate is divided into a plurality of fan-shaped pieces of equal area divided by an imaginary straight line crossing the center portion of the mounting plate. In addition to being removably attached to the panel, traces of the above-mentioned virtual straight lines are formed in the flow paths between each divided piece, and this fan-shaped divided piece is
A sector-shaped solid whetstone having a shape substantially equal to that of the divided pieces is fixed to each part, and a diagonal groove extending obliquely from one side edge to the other side edge is formed on the whetstone surface of each of the sector-shaped solid whetstones.

[Effect]

That is, in the surface polishing device of the present invention, when the wrapping disk rotates, polishing debris generated on the inner grinding wheel surface of the fan-shaped solid grindstone does not transfer to the outer grinding wheel surface, and the slanted particles formed on the grinding wheel are removed. It passes through the groove and is discharged to the outside from the flow path between the fan-shaped solid grinding wheels. Therefore, uneven wear on the outer circumferential side due to large distribution of polishing debris does not occur. In addition, if one of the multiple fan-shaped solid whetstones is damaged, remove only that fan-shaped solid whetstone along with the mounting plate division pieces,
It can be easily replaced with a spare one.

Next, the present invention will be explained in detail based on examples.

〔Example〕

FIG. 1 shows an embodiment of the invention. In the figure, the wrapping disk is constructed by screwing a plurality of substantially sector-shaped solid grindstones 15 onto a wrapping surface plate 13 with a center hole through mounting plate division pieces 13a. Reference numeral 13b denotes a flow path consisting of a gap formed radially between the solid grindstones 15, through which polishing powder and fallen abrasive grains are discharged to the outside. In this case,
Each of the mounting plate division pieces 13a has a planar shape (approximately fan-shaped) of a plurality of areas (all having the same area) formed by dividing the wrapping surface plate 13 by a plurality of imaginary line segments crossing the center thereof. They are configured to have the same planar shape and are compatible, and two screw holes 21 (see FIG. 3) are formed in each. As shown in FIG. 2, on this mounting plate divided piece 13a, a substantially sector-shaped solid whetstone 15 having the same shape as the divided piece 13a is installed, and a screw hole 16 is inserted into the mounting plate divided piece 1.
3a, and in this state, as shown in FIG.
21 and screwed onto the wrapping surface plate 13. 15b is a diagonal groove extending from one side edge of the solid whetstone 15 to the other side edge, and diagonally divides the solid whetstone 15 into upper and lower halves. The diagonal grooves 15b allow the channels 13b on both the left and right sides of the solid grindstone 15 to communicate with each other. A surface polishing apparatus equipped with such a wrapping disk polishes the surface of a workpiece based on a wet method while relatively rotating the wrapping disk and the workpiece (not shown).

In this device, two sets of mounting plate division pieces 13a are prepared for one wrapping disk, and one set is always kept as a spare. Then, while the polishing device is in operation, the surface of the preliminary mounting plate division piece 13a is cleaned, and then the solid grindstone 15 is attached and preparations are made. Any grinding wheel 1 of the lapping disk in operation
When the grindstone 5 is used up, the solid grindstone 15 is removed from the wrapping disk together with the mounting plate divided pieces 13a and replaced with a spare set. By doing so, operation can be resumed easily and quickly. In this case, when the all-solid grindstone 15 is worn out, the entire solid grindstone 15 is replaced.

The material of the mounting plate segment 13a is not particularly limited, but from the viewpoint of lightness, strength, cost, etc., light metals such as aluminum alloy, lightweight structural materials such as plastic plates and glass fiber-reinforced plastic plates are suitable. It is. Furthermore, a mounting plate division piece 13 attached to the surface of the wrapping disk
It is desirable that the number of divisions in the circumferential direction by a is changed as appropriate depending on the size of the wrapping disk. For example, a relatively small number of divisions, such as 16 to 24 divisions for a large disc with an outer diameter of 1000 mm or more, and 2 to 16 divisions for a smaller disc, is sufficient.

〔Effect of the invention〕

In the surface polishing device of the present invention, a mounting plate interposed between a wrapping surface plate and a solid grindstone is divided into a plurality of fan-shaped pieces of equal area and detachably attached to the wrapping surface plate, and the divided pieces are attached to the fan-shaped pieces. A fan-shaped solid whetstone of approximately the same shape is fixed to each. Therefore, if any of the sector-shaped solid grindstones is damaged, it can be easily repaired by removing only the sector-shaped solid grindstone together with the sector-shaped divided pieces and replacing it with a spare one. As a result, unlike the conventional example, even if a part of the solid grindstone is damaged, there is no need to replace the entire solid grindstone. In this case, since all the fan-shaped grindstones on the wrapping surface plate have the same shape, including the fan-shaped divided pieces, only one spare part is needed.
It has the advantage of being compatible with various shapes. Furthermore, since the above-mentioned replacement is easy and does not take much time, the downtime for operation can be extremely shortened. Furthermore, since a flow path is formed between the sector-shaped solid grindstones and the abrasive debris and detached abrasive grains are discharged to the outer circumferential side, there is no excess abrasive debris on the grindstone surface, and the life of the abrasive wheel can be extended. In particular, in this invention, a diagonal groove is provided from one side edge of the fan-shaped solid whetstone to the other side edge, and the fan-shaped solid whetstone is divided into an inner circumferential side and an outer circumferential side. Polishing debris and detached abrasive grains generated on the inner peripheral side do not reach the grinding wheel surface. That is, originally, polishing debris generated on the inner grinding wheel surface of the fan-shaped solid grindstone arrives on the outer circumferential grinding wheel surface due to the centrifugal force when the wrapping disk rotates, and the amount thereof increases. This increases frictional resistance and increases wear on the grinding wheel surface, but due to the formation of the diagonal grooves, polishing debris generated on the inner grinding wheel surface falls into the diagonal grooves, creating a flow path between the grinding wheels. is discharged to the outside through. As a result, on the grindstone surface of the sector-shaped solid grindstone, the distribution amount of polishing debris and detached abrasive grains is approximately the same on both the inner and outer circumferential sides, and uneven wear on the outer circumference side is reduced. In this case, since the diagonal groove is formed diagonally from one side edge to the other side edge, the polishing debris etc. that entered the diagonal groove are moved from one side edge to the other side due to the inertial force when the wrapping disk rotates. It moves vigorously towards the edge, enters the channel between the fan-shaped solid grinding wheels, and is then discharged to the outside by centrifugal force. Therefore, even if the width is narrowed, clogging with polishing debris does not occur, and as a result, the area of the diagonal groove can be made as small as possible to minimize the sacrifice of the area of the grinding wheel.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a wrapping disk used in an embodiment of the present invention, and FIGS. 2 and 3 are explanatory views of its constituent parts. 13... Wrapping surface plate, 13a... Mounting plate divided piece, 15... Fan-shaped solid grindstone, 15b... Diagonal groove.

Claims (1)

[Scope of Claims] 1. In a surface polishing device equipped with a wrapping disk having a structure in which a solid grindstone is attached to a circular or annular wrapping surface plate, the wrapping surface plate and the solid grindstone are provided between the wrapping surface plate and the solid grindstone. A mounting plate having approximately the same shape is interposed, and the mounting plate is divided into a plurality of fan-shaped pieces of equal area divided by an imaginary straight line that crosses the center portion, and is removably attached to the wrapping surface plate, and the above-mentioned A trace of a virtual straight line is formed in the flow path between each divided piece, and a sector-shaped solid whetstone of approximately the same shape as the divided piece is fixed to each of the fan-shaped divided pieces, and a grinding wheel surface of the fan-shaped solid whetstone is attached to one side of each of the fan-shaped solid whetstones. A flat surface polishing device characterized in that a diagonal groove is formed that extends diagonally from one edge to the other side edge. 2. The surface polishing apparatus according to claim 1, wherein the mounting plate segment is made of a lightweight structural material such as aluminum alloy, plastics, or glass fiber reinforced plastics.