JPH0123700Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a V-shaped bearing for electrical discharge machining.

BACKGROUND TECHNOLOGY A bearing with a V-shaped pressure receiving surface directly holds the outer periphery of the shaft and rotates, so essentially,
There is no deflection beyond the roundness of the shaft, and it is used as a high-precision bearing.

Conventionally, this V-shaped bearing has been developed, for example, in JP-A-57-
A configuration as described in Publication No. 33922 is known.

Hereinafter, a conventional V-shaped bearing will be explained with reference to FIGS. 4 and 5. The V-shaped bearing shown in FIG. 4 has two ruby screws 103 protruding from each side of a V-shaped notch 102 in V-blocks 101 (only one of which is shown) installed above and below, the length of which can be adjusted. Attach the shaft 104 with these ruby screws 103.
The tilt can be adjusted.

Further, the V-shaped bearing shown in FIG. 5 has V-block receivers 105 installed above and below (only one is shown).
This V block receiver 105 is made of carbide. Insert a V block 106 made of ceramic or the like,
The V-shaped notch 107 of the V-block 106 allows the shaft 1
04 is now supported.

Problems to be Solved by the Invention However, in the bearing using the ruby screw 103 shown in FIG. 4, if the ruby screw 103 has play, the rigidity is insufficient and the shaft 104 cannot be fixed uniformly. This is difficult and requires skill in adjusting the inclination of the shaft 104. Furthermore, in the bearing shown in FIG. 5, the pair of V-blocks 106 must be manufactured with the same dimensions, and their material is carbide. Because it is made of ceramic, it is difficult to machine, and because carbide is a conductive material, it cannot maintain insulation from the workpiece, making it unsuitable for electrical discharge machining. .

Therefore, the present invention aims to solve the above problems by providing a V-shaped bearing for electric discharge machining that can improve the rotational accuracy of the shaft and can be easily manufactured. be.

Means for Solving the Problems The technical means of the present invention for solving the above problems is that a pair of V blocks are connected together by a connecting block, and each side of the V-shaped notch of each V block is The bearing assembly includes a bearing assembly having grooves formed therein, and a pressure receiving block mounted in each groove of the bearing assembly, and at least one of the V block and the pressure receiving block is formed of an insulating material.

Effects The effects of the above technical means are as follows. In other words, it is possible to improve the machining accuracy of the pressure-receiving block, reduce the deflection of the shaft to submicron when the shaft is rotated on the pressure-receiving surface, and to form at least one of the V-block and the pressure-receiving block with an insulating material. Therefore, it can be adapted to electrical discharge machining.

Embodiment FIG. 1 is a perspective view of a V-shaped bearing for electric discharge machining according to an embodiment of the present invention, FIG. 2 is a plan view, and FIG. 3 is a perspective view for explaining usage conditions. As shown in FIG. 1, the bearing structure 1 is made of machinable ceramic which is an insulating material, and has a pair of upper and lower V blocks 2 connected together by a connecting block 3 on the back side. A groove 5 is formed on each side of the V-shaped notch 4 of each V-block 2. A rectangular plate-shaped block 6 bonded to each groove 5 is made of SIC ceramic which is an insulating material. Pressure receiving blocks 6 are attached to the two pairs of upper and lower grooves 5 of each V block 2 in the bearing structure 1 by adhesive, respectively, and each pressure receiving block 6 is slightly protruded from the groove 5, so that two pairs of upper and lower V-shaped pressure receiving surfaces are formed as a whole. Configure.

To use the V-shaped bearing of the above embodiment, pulleys 10 and 11 are installed on the cylindrical shaft 7 and the output shaft 9 of the motor 8, respectively, as shown in FIGS. the pulleys 10 and 1
1, and the shaft 7 is supported by the pressure receiving surfaces of two pairs of upper and lower pressure receiving blocks 6. The motor 8 is driven to rotate the shaft 7 via the pulley 11, O-ring belt 12, and pulley 10.

According to the above embodiment, the pressure receiving block 6 is bonded to the upper and lower two pairs of grooves 5 of the bearing assembly 1, so that the rigidity is increased. Further, since the pressure receiving block 6 is rectangular, even if difficult-to-cut materials such as ceramics are used, high precision machining is possible by means such as wrapping. Since the pressure-receiving surface is thus easily machined, it can be manufactured with high precision, and adjustments due to the inclination of the shaft 7, the difference in the diameter of the shaft 7, etc. can be made unnecessary.

In the above embodiment, both the bearing structure 1 and the pressure receiving block 6 are made of an electrically insulating material, but the object of the present invention can be achieved by making either one of them an insulating material. it is obvious.

Effects of the invention As is clear from the above explanation, according to the invention, a pair of grooves are formed in the V-shaped notches of a pair of V blocks in the bearing structure, pressure receiving blocks are mounted in these grooves, and the V blocks and Since at least one of the pressure receiving blocks is formed of an insulating material, the machining accuracy of the pressure receiving block can be improved, the shaft can be rotated with high precision, and submicron runout can be realized. Furthermore, the shape of the pressure receiving block can be simplified and manufacturing can be carried out easily.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the V-shaped bearing for electrical discharge machining of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a perspective view for explaining the usage state of the invention, Figs. FIG. 5 is a sectional view and a plan view of a conventional bearing, respectively. DESCRIPTION OF SYMBOLS 1... Bearing structure, 2... V block, 3... Connection block, 4... V-shaped notch, 6... Pressure receiving block.

Claims (1)

[Scope of utility model registration request] A pair of V-blocks are integrally connected by a connecting block, and the bearing assembly is composed of a bearing assembly in which grooves are formed on each side of the V-shaped notch of each V-block, and a pressure-receiving block installed in each groove of the bearing assembly. , above V
A V-shaped bearing for electric discharge machining, characterized in that at least one of the block and the pressure receiving block is formed of an insulating material.