JPH0563738U - Work clamper - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide a clamper that allows a work to follow the rotation of a rotary table well, and to greatly contribute to the convenience of its processing. [Structure] A pressing body 14 is rotatably provided via a bearing 17 on a shaft 2 protruding from the tip of the clamper body 1, and the pressing body 14 and the rotary table 24 are made to press the clamper body 1 by a pressing means. In the work clamper that clamps the work 26 between them, the pressing body 14 is rotated by the elastic body 13 inserted into the shaft 2 of the clamper body 1 so as to rotate the rotary table 24 while clamping the work 26. It is characterized in that it is biased toward the table 24 side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a clamper for a work, more specifically, a work capable of processing four sides by clamping and rotating the work on the side surface of a work such as a rectangular plate while clamping the work on a rotary table. For improving the clamper for car.

[0002]

[Prior Art]

 Conventionally, as a clamper for this kind of work, for example, there is one as shown in FIG.

That is, in this conventional device, a spherical bearing 30 is fitted to a shaft 2b protruding from the tip end surface of the clamper main body 1b, and a spherical concave portion that is spherically slidable on the spherical portion 30a of the spherical bearing 30. A substantially cylindrical pressing body 32 is rotatably attached via a wedge body 31 having 31a.

The clamper 21a is disposed face-to-face above the rotary table 24a fixed to the bed 23a of the double-headed milling machine 22a as shown in FIG. 6, and when the workpiece 26a is actually processed, the rotary table The work 26a is positioned and set on the work 24a via the work laying plate 27a, and the clamper main body 1b is pressed downward by the hydraulic cylinder 9a via the work holding plate 28a or the like, and the pressing body 32a is pressed. Clamp the work piece 26a with a pressing force of about 5000 kg or more. Then, in this state, two opposite side surfaces are cut by the cutter 29a of the double-headed milling machine 22a.

After that, the pressing force of the hydraulic cylinder 9a is reduced to about 700 to 1000 kg, and after rotating the rotary table 24a by 90 ° in this state, the pressing force is increased again to cut the other two side surfaces. is there.

[0006]

[Problems to be solved by the device]

 However, in the above conventional one, since the frictional resistance of the spherical bearing 30 is large, the pressing body 32 follows the rotary table 24a even if the pressing force of the hydraulic cylinder 9a is reduced when the rotary table 24a rotates. Then, only the rotary table 24a is rotated without rotating, and thus the work 26a needs to be positioned and corrected, which causes a fatal problem that the machining work becomes extremely complicated. ..

Therefore, the present invention has been made in order to solve the above-mentioned conventional problems, and provides a clamper that allows a workpiece to follow the rotation of a rotary table well, which is convenient for its processing. The task is to make a great contribution.

[0008]

[Means for Solving the Problems]

 That is, in order to solve the above problems, the present invention rotates the pressing body 14 by the elastic body 13 inserted into the shaft 2 of the clamper body 1 so as to rotate the rotating table 24 while clamping the work 26. It is a work clamper that is biased toward the table 24 side.

[0009]

[Action]

 Therefore, when clamping a work with the clamper characterized by the above structure, first, the work 26 is positioned and set on the rotary table 24 directly or through a floor plate, and then the clamper main body 1 is pushed by the pushing means. For example, the work 26 is clamped by the pressing body 14.

After the work 26 is processed in this state, the rotary table 24 is rotated while clamping the work 26. In this case, if the pressing force of the pressing means is reduced, the elastic force of the elastic body 13 is reduced. The work 26 is pressed by the pressing body 14 via the elastic body 13.

That is, since a part of the pressing force of the pressing means is absorbed by the elastic body 13, the pressing force applied to the bearing 17, the pressing body 14, the work 26, etc. is also reduced, and thus the work force is reduced. While the clamp 26 is clamped, the work 26 can be rotated by a desired angle by following the rotation operation of the rotary table 24.

After that, the pressing force of the pressing means is increased again, the work 26 is clamped on the rotary table 24 by the pressing body 14, and the next processing is performed.

[0013]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a clamper body in which shafts 2 and 3 are provided in a substantially central position on both front and rear end surfaces, and the shaft 3 on the rear end surface is a hole 5 formed at one end of a clamp holder 4. And is fixed by a hollow screw 6 and a ball plunger 7. A screw hole 8 is formed at the other end of the clamp holder in the axial direction, and a rod 10 of a hydraulic cylinder 9 is screwed into the screw hole.

Reference numeral 11 denotes a bearing receiving member fitted and attached to the shaft 2 of the tip end surface 1a of the clamper main body 1 via a disc spring receiving member 12 and a plurality of disc springs 13 ... Reference numeral 14 denotes a pressing body composed of a pressing body 15 having a through hole 15a formed therein and a substantially annular pressing plate 16 attached to one end thereof. The thrust bearing 17 fitted in the through hole 15a has the bearing The shaft portion 11a of the receiving member 11 is press-fitted, and the pressing body 14 is configured to rotate with respect to the shaft 2 of the clamper main body 1.

The pressing body 14 is constantly urged by the disc springs 13 ..., and the distance between the base end surface 16a of the pressing plate 16 of the pressing body 14 and the tip end surface 1a of the clamper body 1 is about 2 mm. It is configured so that a gap 18 is formed.

Reference numeral 19 denotes a lid body fitted in an opening at one end of the pressing body 14, and 20 denotes a V ring extending between the lower end edge of the clamper main body 1 and the pressing plate 16 to prevent dust and the like from entering inside. It was designed to prevent intrusion.

The clamper 21 having such a structure is provided at a lateral position of the rotary table 24 so that the pressing body 14 faces the rotary table 24 mounted on the bed 23 of the double-headed milling machine 22 as shown in FIG. 2, for example. It is used by being fixed to a vertically installed gate-shaped mounting member 25.

First, when the work 26 is clamped, the work 26 is positioned and set on the rotary table 24 via the floor plate 27, and the pressing plate 28 is placed on the upper surface of the work 26.

Next, when the hydraulic cylinder 9 is actuated, the clamper 21 descends and its pressing body 14 abuts on the holding plate 28, and then resists the elastic force of the disc springs 13 ... As shown in FIG. The disc springs 13 are pressed by the disc spring receiving member 12, and the tip end surface 1a of the clamper body 1 and the base end surface 16a of the presser plate 16 come into contact with each other, so that the work 26 is firmly fixed via the presser plate 28. It will be securely clamped.

In this state, the head (not shown) of the milling machine 22 is moved, and the two opposing side surfaces of the work 26 are simultaneously cut by the cutter 29.

Next, the rotary table 24 is rotated by 90 ° to machine the remaining two side surfaces of the work 26. When the pressing force of the hydraulic cylinder 9 is reduced, as shown in FIG. The elastic force of 13 releases the contact state between the tip end surface 1a of the clamper body 1 and the base end surface 16a of the pressing plate 16.

In this state, the rotary table 24 is rotated by 90 °, and the remaining two side surfaces are processed by the milling machine 22.

When the rotary table 24 rotates, part of the pressing force of the hydraulic cylinder 9 is absorbed by the disc springs 13 having elastic force, so that the thrust bearing 17 and the pressing body 14 The pressing force exerted on the work 26 by the pressing plate 27 is reduced.

Therefore, the work 26 can be rotated 90 ° by following the rotation of the rotary table 24 well.

After that, when the pressing force of the hydraulic cylinder 9 is increased again, the work 26 is firmly clamped by the pressing body 14 as described above, and the remaining two side surfaces in this state are cut.

As described above, since the rotating operation of the work 26 can be performed extremely smoothly, the series of operations is not complicated and can greatly contribute to the convenience of processing.

Further, since the clamper 21 according to this embodiment has an extremely simple structure, it has an advantage that it can be easily manufactured at low cost.

In the above embodiment, the elastic body 13 is constituted by the disc spring, but the present invention is not limited to this, and a coil spring or the like may be used, and the elastic body 13 may be used. The position of the arrangement is not limited to that of the embodiment.

Further, although the thrust bearing is used as the bearing 17 in this embodiment, other needle bearings, angular bearings, etc. may be used, and the concrete type and configuration of the bearing 17 are not limited.

Further, it goes without saying that the clamper 21 according to the present invention can be widely applied not only to the cutting processing by the double-headed milling machine 22 but also to various processing machines having the rotary table 24 as a work clamper.

In addition, the shape of the pressing body 14, the pressing means, and the like can be arbitrarily changed in design within the scope intended by the present invention.

[0033]

As described above, according to the present invention, when the pressing force by the pressing means is reduced to rotate the rotary table, a part of the pressing force is absorbed by the elastic body. Therefore, the pressing force applied to the bearing and the pressing body is reduced as compared with the conventional one, and the work can be clamped and follow the rotary table to rotate the work at a desired angle. You can do it.

Therefore, since it is not necessary to perform the complicated work of correcting the positioning of the work as in the conventional case, a special effect that a series of working work can be efficiently and accurately achieved.

Further, since the clamper according to the present invention has an extremely simple overall structure, it also has a practical effect that it can be easily manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment according to the present invention.

FIG. 2 is a front view showing a usage state.

FIG. 3 is a cross-sectional view showing a usage state.

FIG. 4 is a cross-sectional view showing a usage state.

FIG. 5 is a sectional view of a main part showing a conventional example.

FIG. 6 is a front view showing a conventional use state.

[Explanation of symbols]

 1 ... Clamper body 1a ... Tip surface 2 ... Shaft 13 ... Elastic body 14 ... Pressing body 16a ... Base end surface 17 ... Bearing 18 ... Gap 24 ... Rotary table 26 ... Workpiece

Claims (3)

[Scope of utility model registration request] 1. A shaft 2 protruding from the tip of a clamper body 1.
In the work clamper, in which the pressing body 14 is rotatably provided via the bearing 17, and the pressing body 14 is pressed by the pressing means to clamp the work 26 between the pressing body 14 and the rotary table 24. The pressing body 14 is urged toward the rotary table 24 by an elastic body 13 inserted into the shaft 2 of the clamper body 1 so as to rotate the rotary table 24 while clamping the work 26. Work clamper. 2. A shaft 2 protruding from the tip of a clamper body 1.
In the work clamper, in which the pressing body 14 is rotatably provided via the bearing 17, and the pressing body 14 is pressed by the pressing means to clamp the work 26 between the pressing body 14 and the rotary table 24. When the work 26 is clamped, the front end surface 1a of the clamper body 1 and the base end surface 16a of the pressing body 14 are
When the rotary table 24 is rotated while abutting against each other and clamping the work 26, the tip surface of the clamper body 1
In order to form a gap 18 between the base 1a and the base end surface 16a of the pressing body 14, the pressing body 14 is biased toward the rotary table 24 side by the elastic body 13 inserted into the shaft 2 of the clamper body 1. Characteristic work clamper. 3. The work clamper according to claim 1, wherein the bearing 17 is a thrust bearing.