JPS63174867A - Lapping machine - Google Patents

Abstract

PURPOSE:To prevent the occurrence of unevenness in the height of a workpiece, by a method wherein a lap machine is formed with a lap platen, a workpiece holding jig, and a workpiece holding jig guide, and a bearing holding hole, guiding and supporting the workpiece holding jig guide through a bearing, is provided. CONSTITUTION:In a workpiece holding jig 22, to which a workpiece 21 having unevenness in height is laminated, movement except rotation in a vertical direction and a horizontal plane is regulated by means of a cylinder surface and a workpiece holding jig guide 23. A workpiece holding surface is positioned parallel to a lap platen 24, and the workpiece is brought into contact with the lap platen 24 only at the maximum level of the workpiece 21. With the lap platen 24 and the workpiece holding jig 22 rotated in this state, grinding grains supplied on the lap platen 24 enter between the lap platen 24 and the workpiece 21 to effect a lapping work. Even if the work is progressed, a workpiece holding surface and the lap platen 24 are left parallel to each other, the lapping work is completed without the occurrence of unevenness in the height of the workpiece 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a lapping machine for processing various precision parts.

BACKGROUND OF THE INVENTION In recent years, as various parts of lamp boards have become more precise, even higher processing precision has been required.

An example of the conventional lapping machine mentioned above will be described below with reference to the drawings. FIG. 4 is a perspective view of a conventional lapping machine, and FIGS. 5 and 6 are sectional views showing the relationship between the workpiece and the lapping machine before and after processing.

In FIGS. 4 to 6, 1 is a lap surface plate, 2 is a workpiece, and 3 is a workpiece holding jig, which holds the workpiece. 4 is an arm, and 6 is a motor, which rotates the lap surface plate 1.

The operation of the lapping machine configured as described above will be explained below.

First, the workpiece 2 is attached and held on the workpiece holding jig 3. Then, it is placed on a lapping platen 1 to which a machining fluid mixed with abrasive grains is supplied. The workpiece holding jig 3 rotates due to the rotation of the lapping surface plate 1 and the action of the arm 4, and the workpiece 2 is processed by the abrasive grains.

Problems to be Solved by the Invention However, if there are variations in the height of the workpiece 2, the workpiece holding jig 3 will tilt as shown in FIG.
As shown in the figure, the workpiece holding jig 3 remained tilted, and there was a problem in that not only the heights of the workpieces 2 were not aligned, but also the perpendicularity between the machined surface and the side surface was incorrect.

In view of the above-mentioned problems, the present invention provides a lapping machine in which there is almost no variation in the height after processing even if there is variation in the height of the workpiece.

Means for Solving the Problems In order to solve the above-mentioned problems, the lapping machine of the present invention has a lapping surface plate having a rotational drive means and supported on a base, and a cylindrical lapping plate that holds the workpiece on the end surface. and a workpiece holding jig guide fixed on a base, and the workpiece holding jig guide has an outer peripheral surface of the workpiece holding jig attached to A bearing holding hole is provided that guides and supports the workpiece through a bearing so that the end surface that holds the workpiece can slide vertically while always remaining parallel to the lapping surface of the lapping surface plate.

Function: With the above-described configuration, the workpiece is machined while the reference plane provided on the workpiece holding jig moves along the workpiece holding guide. The object holding surfaces are always parallel.

EXAMPLE Hereinafter, a lapping machine according to an example of the present invention will be described with reference to the drawings.

1 to 3 show a lapping machine according to an embodiment of the present invention. In FIGS. 12 to 3, 21 is a workpiece, and 22 is a workpiece holding jig that holds the workpiece 21.

23 is a workpiece holding jig guide, 26 is a rolling shaft,
The rolling bearing 26 is fitted into a bearing holding portion 27.

24 is a lap surface plate; 26 is a motor for rotating the lap surface plate 24. Note that the workpiece holding jig guide 23 is fixed on a base (not shown), and the lap surface plate 24 and motor 26 are also supported on the base.

FIGS. 2 and 3 are cross-sectional views showing the relationship between the workpiece 21 and the lapping surface plate 24 before and after processing.

The operation of the lapping machine constructed as described above will be explained below with reference to FIGS. 1, 2, and 3.

First, as shown in Fig. 2, the workpiece holding jig 22 to which the workpieces 21 with varying heights are attached is fixed in the vertical direction and in the horizontal plane by the cylindrical surface and the workpiece holding jig guide 23. Movements other than rotation are restricted, and the workpiece holding surface and the lap surface plate 24 are parallel to each other, and the workpiece 21 comes into contact with the lap surface plate 24 only at the highest point. In this state, the lap surface plate 24 and the workpiece holding jig 22
As the abrasive grains are rotated, the abrasive grains supplied onto the lapping platen 24 enter between the lapping platen 24 and the workpiece 21, and processing is performed. Even as the machining progresses, the workpiece holding surface and the lap surface plate 24 remain parallel, and as shown in FIG. 3, the machining can be completed with almost no variation in height of the workpiece 21.

Note that the rolling bearing 26 built into the workpiece holding jig guide 23 does not necessarily have to be a rolling bearing, and may be a static pressure bearing, a flat bearing, or the like.

Effects of the Invention As described above, according to the present invention, the workpiece holding jig and the lapping surface plate can always be maintained in a parallel state, so that machining without height variations can be easily performed.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a lapping machine in an embodiment of the present invention, Figs. 2 and 3 are sectional views showing the relationship before and after processing of the lapping machine in an embodiment of the present invention, and Fig. 4 is a conventional lapping machine. , FIG. 5, and FIG. 6 are cross-sectional views showing the relationship before and after processing of a conventional lapping machine. 21... Workpiece, 22... Workpiece holding jig, 23... Workpiece holding jig guide,
24... Lap surface plate, 26... Motor, 26... Rolling bearing (bearing), 27...
...Bearing holding hole.

Claims (1)

[Claims] A lap surface plate having a rotational drive means and supported on a base, a cylindrical workpiece holding jig for holding a workpiece on an end face, a workpiece holding jig guide fixed on the base; The workpiece holding jig guide includes:
The outer circumferential surface of the workpiece holding jig is mounted via a bearing so that the end surface that holds the workpiece can slide vertically in a state that always remains parallel to the lapping surface of the lapping surface plate. A lapping machine characterized by having a bearing holding hole for guiding and supporting.