JPH0351095Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a single-sided lapping machine for lapping the end face of a workpiece.

(Prior Art) Conventionally, a work holder used in a single-sided lapping machine has been composed of a simple circular plate having a plurality of holes for holding the work. In the lapping process, the work holder is placed on the grinding wheel of the lapping machine.
Subsequently, the workpieces are inserted one by one into the holes, and after that, the workpieces are pressed against the rotating grindstone while applying a pressing plate to the rear end surface of the workpieces.

(Problem to be solved by the invention) In other words, when using the conventional work holder mentioned above, the workpiece must be replaced (setup change) on the lap board, so the time required to change the workpiece is There was a problem in that productivity was reduced due to frequent pauses, and since the work was performed on a grinding wheel, it was necessary to take an unstable posture, which compromised safety.

In addition, there are naturally dimensional variations in the material work, but the wrapping method described above, which uniformly presses the rear end of the workpiece, cannot absorb this dimensional variation, resulting in the problem of variations in wrapping accuracy. It was hot.

(Means for Solving the Problems) The present invention was made to solve the above problems, and consists of placing a work holder on a rotatably provided grindstone, and placing the work holder around the outer periphery of the work holder. In the single-sided lapping machine, the workpiece is held by a plurality of roller guides arranged along the same line, and the end face of the workpiece held by the workholder is pressed against the grindstone by pressing the work holder toward the grindstone side by a pressing means. The work holder includes a disc-shaped main body having a center hole, a rubber magnet plate that also has a center hole and is faced to the main body, and a boss portion that is fitted into the center hole of the main body and the magnet plate. and a mounting plate having a plurality of holes for holding a workpiece in a flat plate portion facing the magnet plate, a pin provided on the inner surface of the center hole of the main body, and a groove provided on the outer periphery of the boss portion of the mounting plate. The gist of the present invention is to include a rotation preventing means for restricting mutual rotation of the main body and the mounting plate by engagement between the pin and the groove.

(Function) In the single-sided lapping machine having the above configuration, if the main body, magnet plate, and mounting plate are assembled in advance to form an integrated work holder, and a work is inserted into the hole in the mounting plate, the work will be able to hold its rear end. It is attracted to the magnetic plate and prevented from falling off from the work holder. This makes it possible to hold the workpiece outside the lapping machine, making it possible to change the workpiece setup by replacing the entire workpiece holder.

Furthermore, since the rear end of the workpiece comes into contact with a rubber-based magnet plate that is an elastic body, it becomes possible to absorb dimensional variations in the workpiece during wrapping, thereby stabilizing the wrapping processing accuracy.

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

FIG. 1 shows a work holder for a single-sided lapping machine according to the present invention. In the figure, 1 is a disc-shaped main body having a center hole 1a, 2 is a rubber-based magnet plate also having a center hole 2a, and 3 is a flat plate portion 3a and a hollow boss portion 3b. This is a mounting plate having a plurality of holes 3c for holding a workpiece.

These main body 1, magnet plate 2, and mounting plate 3 are:
They are mated together to form an integral work holder. That is, the boss portion 3b of the mounting plate 3 is attached to the main body 1.
It is formed in an appropriate size so that it can fit into the respective holes 1a and 2a of the main body 1 and the magnet plate 2.
A pin 4 is provided in the mounting plate 3 so as to project into the hole 1a, and a groove 5 is provided in the boss portion 3b of the mounting plate 3 so as to be engageable with the pin 4. As a result, first, the magnet plate 2 is placed face to face with the main body 1, and then the pin 4 of the main body 1 is engaged with the groove 5, and the boss portion 3b is fitted into the holes 1a and 2a, and the mounting plate 3 is attached to the magnet plate. 2, a trinity work holder is formed. At this time, the rotation of the main body 1 and the mounting plate 3 is restricted by the engagement between the pin 4 and the groove 5.

The integrated work holder as described above has
In advance, attach the hole 3c of the mounting plate 3 outside the lap board.
The workpiece is inserted. The rear end of the workpiece is attracted to the magnetic plate 2, so that it cannot fall off from the workpiece holder, and the workpiece is delivered to a single-sided lapping machine in an inverted state together with the workholder.

As shown in FIGS. 2 and 3, the single-sided lapping machine according to the present invention has a grinding wheel 12 fixedly mounted on a rotating shaft 11, and is further provided with a roller guide 13 above the grinding wheel 12. The work holder 15 with the work 14 inserted therein is mounted on the roller guide 13.
is positioned on the grindstone 12. The work holder 15 set on the grindstone 12 has its rear end connected to a pressing means (not shown) so that rotation and load are applied to it.Meanwhile, the grindstone 12 is also rotated, and during this time Wrapping processing of the workpiece 14 is performed.

Therefore, during the wrapping process, the elasticity of the magnet plate 2 absorbs variations in thickness between the plurality of works 14, and a uniform pressing force is applied from the work holder 15 to the works 14. As a result, variations in wrapping accuracy can be suppressed.

In addition, if you have multiple such work holders, you can finish inserting the work into the other work holders during the above-mentioned wrapping process, and you can immediately change the setup by replacing the work holders as soon as wrapping is completed. be able to do it.

(Effects of the invention) As explained in detail above, the single-sided lap board according to the invention has a split structure with an elastic magnetic plate placed in the middle, and has the following effects. .

It becomes possible to attach and detach the workpieces outside the lap board, and by replacing the workpiece holder all at once, the workpiece setup can be completed in a short time, and productivity is significantly improved.

The elastic magnet plate makes it possible to absorb dimensional variations in the workpiece, thereby eliminating variations in wrapping accuracy.

Since workpiece setup changes can be handled by batch replacement of the work holder, the possibility of automating workpiece setup changes by, for example, adding an exchange device increases.

Since the main body of the work holder and the mounting plate are prevented from rotating on the inner diameter side and a protruding portion from the outer periphery is eliminated, the work holder can be easily held using a roller guide, and changeover performance is improved.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the structure of a work holder for a single-sided lapping machine according to the present invention, and Figs. 2 and 3 show how the work holder is used in the lapping machine. The figure is a plan view, and FIG. 3 is a side view. 1...Main body, 1a...Center hole of main body, 2...Magnetic plate, 2a...Center hole of magnet plate, 3...Mounting plate,
3a...Flat plate part, 3b...Boss part, 3c...Work holding hole, 4...Pin, 5...Groove.

Claims (1)

[Scope of utility model registration request] A work holder is placed on a rotatably provided grindstone, the work holder is held by a plurality of roller guides arranged along the outer periphery of the work holder, and the work holder is pressed against the grindstone by a pressing means. In a single-sided lapping machine in which the end face of a work held by the work holder is pressed against a grinding wheel, the work holder is provided with a disc-shaped main body having a center hole, and a disc-shaped main body having a center hole and facing the main body. a mounting plate having a boss portion fitted into the center hole of the main body and the magnet plate, and a hole for holding a workpiece in a flat plate portion facing the magnet plate; and a rotation prevention means consisting of a pin provided on the inner surface of the center hole of the main body and a groove provided on the outer periphery of the boss portion of the mounting plate, and which restricts mutual rotation between the main body and the mounting plate by engagement of the pin and the groove. Features a single-sided rap disc.