JPH0796438A - Supporting device of workpiece - Google Patents

Abstract

PURPOSE:To improve concentricity against the outer diameter of a workpiece by constitution to carry out centering against the outer diameter of the workpiece with a fixed standard shoe as a standard. CONSTITUTION:A supporting device is so constructed as to carry out centering by holding a workpiece 5 by a magnet chuck main body 20 free to slide and passing the workpiece 5 against a standard shoe 8 by a pressing tool 9. Consequently, in comparison with construction to carry out centering with an outer diameter of the workpiece, influence of eccentricity, gripping precision, etc., of a workpiece holding part (chuck main body) of a chuck is eliminated, concentricity against the outer diameter of the workpiece 5 is improved, and a ball groove 22 can be precisely ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supporting a workpiece, for example, a technique for facilitating centering of an already ground workpiece with respect to its outer diameter.

[0002]

2. Description of the Related Art Conventionally, when a ball groove 2 is ground on the inner diameter of a workpiece 1 which has already been ground, the outer periphery of the workpiece 1 is collet, diaphragm or hydraulic. There is known a method in which the ball groove 2 is gripped by a chuck 3 of the above method, the position of the ball groove 2 is indexed, and the ball groove 2 is ground by a groove grinding wheel 4 or the like (FIG. 6).
reference).

[0003]

However, in the method of performing the centering with the outer diameter of the work piece 1 as a reference, the work piece holding portion (chuck body) of the chuck 3 has eccentricity, gripping accuracy, and cutting chips. There was a problem that the concentricity with respect to the outer diameter of the work piece 1 was poor due to the influence of the biting of the workpiece 1 and the ball groove 2 could not be ground accurately.

In view of the conventional problems as described above, the present invention uses a fixed reference shoe as a reference to perform centering with respect to the outer diameter of the workpiece, thereby achieving the concentricity with respect to the outer diameter of the workpiece. The purpose is to be good.

[0005]

For this reason, in the supporting device for a workpiece according to the present invention, a rotating portion rotatable about a fixed central axis, and the central axis and the shaft with respect to the rotating portion. A chuck having a slide portion slidably supported in a plurality of predetermined directions at right angles and a holding portion for holding a workpiece with a configuration that operates integrally with the slide portion, and a workpiece held by the holding portion of the chuck A fixed reference shoe that serves as a reference for centering the workpiece, and a pressing tool that presses the workpiece against the reference shoe while supporting the outer peripheral surface in contact therewith;
It was composed including.

[0006]

[Operation] The holding part holds the workpiece slidably,
The workpiece is pressed against a fixed reference shoe to center it. As a result, compared to the structure in which the outer diameter of the workpiece is used as a reference, there is no influence of eccentricity of the workpiece holder of the chuck (chuck body), gripping accuracy, etc. The concentricity becomes good, and the ball groove can be ground accurately.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. 1 to 4, the support device for the workpiece 5 is
A rotating portion 6 rotatable about a fixed central axis, a sliding portion slidably supported in a plurality of predetermined directions perpendicular to the central axis with respect to the rotating portion 6, and integrally with the sliding portion. A chuck 7 having a holding portion for holding a workpiece in an operating configuration and an outer peripheral surface of the workpiece 5 held by the holding portion of the chuck 7 are supported in contact with each other, and fixed as a reference for centering the workpiece 5. The reference shoe 8 and the pressing tool 9 that presses the workpiece 5 against the reference shoe 8.

Here, the reference shoe 8 is the fixing member 1.
It is fixed at 0. The fixing member 10 is a horizontal plate 1
0A and a vertical plate portion 10B erected from the upper surface of the horizontal plate portion 10A. A pair of protrusions 10a is provided from both sides at the upper end of the vertical plate portion 10B.
The reference shoes 8 are attached to the ends of 0a. The pressing tool 9 is composed of a pressing operation mechanism (not shown) and a pressing member 9A operated by the mechanism, and the pressing member 9A is disposed above the reference shoe 8 so as to extend in the vertical direction.

Next, the rotating portion 6 is composed of a cylindrical body having a horizontal central axis rotated by a rotating means (not shown). A groove 11 is formed at the tip of the rotating portion 6 so as to traverse in the horizontal direction. A pair of stopper portions 12 are formed in the upper and lower portions of the groove 11 near one end thereof so as to face each other. Substantially V-shaped grooves 13 are formed on the upper and lower surfaces of one side of the groove 11 with the stopper portions 12 as boundaries, and one side of the groove 11 is configured as a slide groove 14. Further, substantially V-shaped grooves 15 are formed on the surface of the stopper portion 12 facing the other end side, respectively. A first slide member 16 is provided in the slide groove 14.
Can be slid freely. The first slide member 16 is formed of a rectangular plate member, and the upper and lower surfaces thereof are formed into a substantially V-shaped surface 17 that matches the substantially V-shaped groove 13 of the slide groove 14. Further, both side surfaces of the first slide member 16 are formed into substantially V-shaped surfaces 18 and 18 ′ that match the substantially V-shaped groove 15 of the stopper portion 12.

Second slide members 19, 19 'are slidably inserted and arranged on the other side of the groove 11. The second slide member 19 has two pieces 19A and 19A.
And a substantially V-shaped surface 18 of the first slide member 16 at the tip surface of the piece portion 19B.
To form a substantially V-shaped groove 20. Further, the second slide member 19 ′ integrated with the magnet chuck body 21 is also formed with a substantially V-shaped groove 20 ′ that matches the substantially V-shaped surface 18 ′ on the side surface of the first slide member 16. .

The first slide member 16 and the second slide members 19 and 19 'constitute the slide portion. On the other hand, the holding part is composed of a magnet chuck body 21. This magnet chuck body 21
Is formed in a cylindrical shape having a closed rear end surface. The second slide member 19 is fixedly attached to the rear end surface of the magnet chuck body 21 by a screw 21a or the like, and the second slide member 19 is inserted and arranged on the other side of the groove 11, The end surface is arranged so as to contact the tip surface of the rotating portion 6.

Now, the operation of the first and second slide members 16 and 19 associated with the operation of the magnet chuck body 20 will be described. Since the magnet chuck body 21 is fixed to the second slide member 19, When the chuck body 21 moves in the horizontal direction of FIG. 3, the second slide member 19 also slides in the horizontal direction of FIG. At this time, the first slide member is pushed by the second slide member 19.
The slide member 16 slides horizontally along the slide groove 13. Also, the magnet chuck body 21
Moves in the vertical direction in FIG. 3, the second slide member 1
9 also slides along the first slide member 16 in the vertical direction of FIG. At this time, the second slide member 19 does not move.

Next, a method of supporting the workpiece 5 by the supporting device and grinding the ball groove 22 on the inner diameter of the workpiece 5 will be described. First, as shown in FIG. 5, the workpiece 5 has already been ground on its outer diameter, and its inner diameter is 9 mm.
The ball grooves 22 are provided at four locations that are circumferentially separated by an angle of 0 degree.
Grind. Workpiece 5 is magnet chuck body 2
The magnetic field is magnetically attracted to the tip surface of No. 1 and held. Then, the workpiece 5 is positioned at an appropriate position above the reference shoe 8. At this time, the workpiece 5 is in a state where it does not come into contact with the reference shoe 8 (solid line position in FIG. 1). And the pressing member 9A
Is moved downward to contact the outer peripheral surface of the workpiece 5, and the workpiece 5 is pressed downward and moved. As a result, the work piece 5 is pressed against the reference shoe 8 and is contacted and supported by the reference shoe 8 (indicated by the dotted line in FIG. 1). At this time, the processed product 5
Moves downward, the magnet chuck body 21 moves downward, and the second slide member 19 fixed to the magnet chuck body 21 slides downward along the first slide member 16.

After the workpiece 5 is supported in this manner, the ball groove 22 is moved to the X position in FIG.
Grind. When the grinding of the ball groove 22 at the X position is completed, the rotating portion 6 is rotated by 90 degrees, and the pressing member 9A is similarly moved downward to move the workpiece 5
Is pressed against the reference shoe 8 to contact and support the reference shoe 8. In this case, when the workpiece 5 moves downward, the magnet chuck body 21 moves and the second slide member 19 slides in the direction orthogonal to the above. At this time, the first slide member 16 is pushed by the second slide member 19 and slides along the slide groove 14.

The above operation is sequentially repeated to grind all the ball grooves 22. With this configuration, the workpiece 5 is slidably held by the magnet chuck main body 21, and the workpiece 5 is pressed against the fixed reference shoe 8 to perform centering, so that the outer diameter of the workpiece is reduced. Compared to the structure in which centering is performed as a reference, there is no influence of eccentricity of the workpiece holding portion (chuck body) of the chuck, gripping accuracy, etc., and the concentricity with respect to the outer diameter of the workpiece 5 becomes good, The groove 22 can be accurately ground.

In particular, in this embodiment, the reference shoe 8
Is attached to the tips of the pair of protrusions 10a of the fixing member 10 to keep the area small,
It is possible to minimize the trapping of the cutting chips between the contact surfaces of the reference shoe 8 and the workpiece 5, and there is no influence of the trapping of the cutting chips. From this point as well, the concentricity with the outer diameter of the workpiece 5 can be obtained. The degree is good.

In the above embodiment, the first and second slide members 16 and 19 as slide portions supported slidably with respect to the rotating portion 6 in a plurality of predetermined directions perpendicular to the central axis thereof. , The ball groove 22 formed in the workpiece 5
4 and the number of positions corresponding to the 90 ° circumferentially spaced positions, which is the number of positions, and the number of positions to be formed in other workpieces as well. The slide structure may be configured to correspond to the position and the position.

As described above, the present invention has been described with reference to the specific embodiments, but the present invention is not limited to this, and is attached to the present invention by a person skilled in the art. Without departing from the scope of the appended claims
It should be noted that various changes and modifications are possible.

[0019]

As described above, according to the workpiece supporting apparatus of the present invention, the chuck having the rotating portion, the slide portion and the holding portion, and the workpiece outer peripheral surface held by the holding portion of the chuck are provided. It is configured to include a fixed reference shoe that serves as a reference for centering the workpiece and a pressing tool that presses the workpiece against the reference shoe, and the fixed reference shoe is used as a reference. Since the centering is performed with respect to the outer diameter of the work piece, the concentricity with respect to the outer diameter of the work piece can be improved, which is effective, for example, when grinding a ball groove or the like on the inner diameter of the work piece. .

[Brief description of drawings]

1A and 1B are views showing an embodiment of a workpiece support device according to the present invention, in which FIG. 1A is a side view and FIG. 1B is a front view.

FIG. 2 is a perspective view of the above embodiment.

FIG. 3 is an exploded perspective view of the above embodiment.

FIG. 4 is a sectional view taken along the line AA in FIG.

5A and 5B are views showing a structure of a workpiece in the same embodiment, in which FIG. 5A is a side view and FIG. 5B is a front view.

FIG. 6 is a front sectional view showing an embodiment of a conventional workpiece support device.

[Explanation of symbols]

 5 Workpiece 6 Rotating part 7 Chuck 8 Reference shoe 9 Pressing tool 16 First slide member 19, 19 'Second slide member 21 Magnet chuck body

Claims (1)

[Claims] 1. A rotating part rotatable about a fixed central axis, a sliding part slidably supported by a plurality of predetermined directions perpendicular to the central axis with respect to the rotating part, and the sliding part. A chuck having a holding portion for holding a workpiece in a structure that operates integrally, and a workpiece outer peripheral surface held by the holding portion of the chuck are supported in contact with each other and fixed as a reference for centering the workpiece. A support device for a workpiece, comprising: a reference shoe; and a pressing tool for pressing the workpiece against the reference shoe.