JPS6122742Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chuck jig for clamping and fixing a material from both sides during material processing, and particularly to a chuck jig suitable for use in processing a forged material.

Generally, when processing a forged material having an L shape or a cross shape, for example, a chuck jig having a pair of opposing chuck bodies is used to clamp and fix the material from both sides.

By the way, in this type of chuck jig, the surface of one chuck body facing the material is formed as a flat surface, and the surface of the other chuck body facing the material has an L-shape or an L-shape that matches the shape of the material. Some have a structure with cross-shaped grooves,
Conventionally, in order to clamp and fix materials of different sizes and shapes, it is necessary to replace the chuck body provided with the groove with a chuck body having the corresponding groove shape, which has the disadvantage of requiring a large amount of time to replace. .

Furthermore, even if the material is of the same shape, there may be some dimensional errors such as variations in the width across flats or misalignment between the upper and lower dies during forging, and the material may also be deformed. In such a case, the material may shake or it may not be possible to center the material using a chuck body having grooves that match the shape of the material. This tendency is particularly noticeable when both chuck bodies are provided with grooves.

For this reason, conventionally, the grooves of the chuck body have been filled or rubbed at each setup change, but this work is not easy and is a bottleneck in the process.

This idea was created in view of the current situation,
It is easy to change setups, and even if the material is slightly deformed or uneven, the material can be securely fixed without overlaying or rubbing.
Another object of the present invention is to provide a chuck jig that allows easy centering.

In this invention, each main body consists of a main pawl and a piece pawl that is removably attached to the material facing part of the main pawl, and when changing setups, only the piece pawls are attached and removed, simplifying the setup change. The piece claw can be moved relative to the main claw in a plane perpendicular to the material clamping direction, and the moving directions of the opposing piece claws are perpendicular to each other, and if the material has deformation or variation, this The piece is characterized in that the piece claws are moved in accordance with the movement of the material, and the material can be easily fixed and centered without the need for overlaying or rubbing.

Hereinafter, the first embodiment of the present invention will be explained in Figures 1 to 7.
This will be explained with reference to the figures.

Figures 1 and 2 show a chuck jig in a rotary-only machine. Installed and L from both sides
It is composed of claws 3 and 4 that clamp and fix the tubular forged material A, and correction blocks 5 and 6 that are attached to the center of the surface of each of the claws 3 and 4 that faces the forged material A.

As shown in FIGS. 3 and 4, each of the claws 1 and 2 is provided with four mounting holes 7 and 8, respectively, for mounting on a slide base (not shown). On the surface facing the piece claws 3 and 4,
A horizontal dovetail groove 9 and a vertical dovetail groove 10 are provided, which are orthogonal to each other at the centerline position. on the other hand,
The main claw 1 of each piece claw 3, 4 corresponding to each main claw 1, 2,
As shown in FIGS. 1 and 2, a dovetail protrusion 1 is provided on the surface facing the dovetail groove 2 to be engaged with each dovetail groove 9, 10.
1 and 12 are provided integrally, and each piece pawl 3 and 4 extends horizontally or vertically to each main pawl 1 and 2 along the longitudinal direction of each dovetail groove 9 and 10 and dovetail projection 11 and 12. It is possible to slide.

A key member 13 is fitted in the longitudinal direction between each dovetail groove 9, 10 and each dovetail protrusion 11, 12 to fill the gap therebetween. Screw holes 14, 1 reaching each key member 13
Three dovetail grooves 5 are provided along the longitudinal direction of the dovetail grooves 9 and 10. The dovetail protrusions 11 and 12 engaged with the dovetail grooves 9 and 10 are then inserted into the screw holes 14 and 1.
It is pressed through the key member 13 by a set screw (not shown) screwed into the key member 5, and is fixed to the plate at any sliding position.

As shown in FIGS. 5 and 6, the key member 13 has a rod-like shape with a parallelogram cross section, and the tip of the set screw (not shown) is provided at a portion facing the screw holes 14 and 15. Recess 1 to be fitted
3a are provided at three locations. When the setscrews are loosened and the pawls 3 and 4 are slid, the key member 13, in which the tips of the setscrews are fitted into the recesses 13a, slides into the dovetail grooves 9 and 10 together with the pawls 3 and 4. Designed to prevent sliding.

As shown in FIGS. 1, 2, and 7, L-shaped grooves 16, 17 each having a trapezoidal cross section and having sloped sides are formed on the surfaces of each of the pawls 3, 4 facing the forging material A.
are provided facing each other, and the L-shaped forged material (for example, an elbow) A is fitted into both L-shaped grooves 16 and 17 and is clamped and fixed from both sides by the piece claws 3 and 4. . A slight dimensional error in the forged material A can be absorbed by the sloped sides of each L-shaped groove 16, 17.

A square hole 2 with round holes 18 and 19 at the four corners is provided at the center of the surface of both of the pawls 3 and 4 facing the forged material A, as shown in FIGS. 1, 2 and 7.
0 and 21 are provided respectively, and each square hole 2
The correction blocks 5 and 6 are inserted into the correction blocks 0 and 21 in a removable and replaceable manner, and each correction block 5 and 6 is fixed by setscrews 22 and 23 that are screwed into the correction blocks from the dovetail projections 11 and 12 side. ing.

As shown in FIG. 7, on the surface of the one correction block 5 facing the forged material A, a slope 5a is provided at a position slightly inward from the position of the outer side surface forming the slope of the L-shaped groove 16, and A slightly shallow bottom surface 5b is provided at a position corresponding to the bottom surface of the L-shaped groove 16. The surface 5c of the correction block is at the same height as the surface of the piece pawl 3.

On the other hand, the other correction block 6 has a symmetrical shape with the correction block 5, and has a surface facing the forged material A similar to the slope 5a and bottom surface 5b as shown in FIGS. 1 and 2. A slope 6a and a bottom surface 6b are respectively provided.

These two correction blocks 5, 6 are connected to both L-shaped grooves 1.
6, 17, that is, the degree of dimensional error of the forging material A, is selected from among a plurality of types and is attached to each piece pawl 3, 4, and is attached to each L-shaped groove 16. , 17, which cannot be absorbed by only the two side surfaces of the forging material A, effectively absorbing the dimensional error of the forging material A, thereby preventing the forging material A from wobbling.

Next, the effect will be explained.

When fixing the forged material A, first
The pieces 3 and 4 that match the shape are selected, and correction blocks 5 and 6 are selected and installed in the square holes 20 and 21 of the pieces 3 and 4 according to the dimensional error of the forging material A.

Next, the dovetail projections 11, 12 of the piece claws 3, 4
are inserted into the dovetail grooves 9 and 10 of the main claws 1 and 2, and then the key member 13 is inserted. Then, the two claws 1 and 2 are moved in the approaching direction, and the forging material A is held between both the pieces of claws 3 and 4 from both sides.

Here, if the forging material A is not properly gripped and fixed in the L-shaped grooves 16 and 17 of both bridge pawls 3 and 4, or if the forged material A is misaligned even if it is successfully gripped and fixed, then Adjustment is made by horizontally moving the piece pawl 4 along the dovetail groove 10 and vertically moving it vertically. After the adjustment, set screws (not shown) screwed into the screw holes 14 and 15 are tightened to fix the bridge pawls 3 and 4 to the main pawls 1 and 2.

When clamping a forged material A having a completely different shape, loosen the setscrews (not shown) in the threaded holes 14 and 15 and replace the pawls 3 and 4 with ones that match the shape of the material.

Therefore, even when clamping and fixing a forged material A with a completely different shape, there is no need to replace the entire jig, unlike conventional ones, and only the piece claws 3 and 4 need to be replaced, which significantly reduces the replacement time. can be shortened to According to comparative experiments conducted by the present applicant, it was confirmed that while the conventional type required replacement time of 60 to 70 minutes, it only took 10 to 20 minutes, which was a significant reduction in replacement time.

Furthermore, even if there is a dimensional error or deformation in the forged material A, it can be easily adjusted by simply moving the piece claws 3 and 4 in the orthogonal direction, and moreover, by attaching and removing the correction blocks 5 and 6. , allowing more accurate and wider adjustment. According to comparative experiments conducted by the present applicant, it has been confirmed that while the conventional adjustment required 3 to 5 hours, it can be shortened to 30 to 60 minutes.

In addition, by relatively moving the bridge claws 3 and 4 in the orthogonal direction, centering becomes easier.
It becomes possible to shorten the time required from 30 to 30 minutes to 5 to 10 minutes. When centering, etc., use the piece claws 3 and 4.
There is no need to apply lining or rubbing to the surface.

8 to 10 show a second embodiment of the present invention, in which the bridge pawl 4, correction block 6 and set screw 23 in the previous embodiment are replaced by a bridge pawl 24,
A correction block 26 and a set screw 33 are used.

That is, a cross-shaped groove 27 with sloped side walls is provided on the front side of the piece claw 24 which has a dovetail projection 12 on the back side, and a rounded corner is provided at a position slightly offset from the center. A square hole 31 is provided. Two female threads 34 for screwing in the setscrew 33 shown in FIG. 33 so that it can be fixed.

As shown in FIG. 10, the correction block 26 includes an arcuate slope 26a and a bottom surface 26b that is slightly shallower than the bottom surface of the groove 27.
A hole 3 for inserting a set screw 33 is provided in the corresponding part.
5 is provided.

Therefore, in the cross-shaped groove 27 of the piece pawl 24 shown in FIG. It becomes possible to clamp and fix the forged material A. Dimensional errors or deformations in the forged material A can be absorbed by attaching and detaching correction blocks 26 that match the degree of the errors. In this case, the correction block 26 is located on the front side of the piece pawl 24,
That is, since it can be attached and removed from the side facing the forged material A, it is convenient because it is not necessary to remove the bridge pawl 24 from the main pawl 2 every time the correction block 26 is attached or removed.

Furthermore, since the piece pawl 24 is provided with a cross-shaped groove 27, if a correction block 26 of a completely different shape is used, the forging material A can be
Even if it has a shape, it can be clamped and fixed. In this case, it goes without saying that the piece pawl 3 in the embodiment described above also needs to have a shape symmetrical to the piece pawl 24.

As explained above, in the present invention, each of the pair of opposing bodies is composed of a main pawl and a piece pawl that is removably attached to the part of the main pawl that faces the material. You only need to replace the
Setup changes can be greatly simplified. In addition, the piece claws can slide against the main claws in a plane perpendicular to the material holding direction, and the sliding directions of the opposing piece claws are orthogonal to each other, so that the dimensions of the material can be adjusted. Even if there is an error, deformation, or misalignment, by sliding the piece claws in different orthogonal directions, both pieces can handle the object being held, such as a forged material with an uneven cross-sectional shape. It can be stably clamped in a state that best suits the cross-sectional shape. At this time, there is no need for overlaying and rubbing, which were conventionally required, so it is possible to significantly save labor.

[Brief explanation of the drawing]

Fig. 1 is a front view of a chuck jig showing the first embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a front view of the main chuck, and Fig. 4 is a view similar to Fig. 3. 5 is an explanatory diagram of the key member; FIG. 6 is a left side view of FIG. 5; FIG. The figure is a sectional view of a bridge pawl and correction block showing a second embodiment of the present invention, and FIGS. 9 and 10 are explanatory diagrams of the bridge pawl and correction block shown in FIG. 8, respectively, viewed from the forging material side. . 1, 2... Real claw, 3, 4, 24... Piece claw, 5,
6, 26... Correction block, 5a, 6a, 26a
...Slope, 5b, 6b, 26b...Bottom, 9,1
0...Dovetail groove, 11, 12...Dovetail projection, 13...
Key member, 16, 17... L-shaped groove, 20, 21,
31...Square hole, 27...Groove, A...Forged material.

Claims (1)

[Claims for Utility Model Registration] 1. In a chuck jig that clamps and fixes a material such as a forged material from both sides by a pair of opposing bodies, each of the bodies is attached to and detached from the main claw and the opposing part of the material of the main claw. It consists of a piece pawl that can be attached to the main body, and the piece pawl can be slid against the main pawl in a plan view perpendicular to the material clamping direction, and the sliding direction of the piece pawl on one body and the other body are A chuck jig characterized in that the sliding directions of the piece claws are perpendicular to each other. 2. The chuck jig according to claim 1, wherein the chuck has a correction block in the center facing the material, which can be attached and removed in accordance with the shape of the material.