JPS62267019A - Metal die clamping device for bending machine - Google Patents

Abstract

PURPOSE:To securely change a die with a simple motion and structure by operating the clamping member utilizing a wedge effect and the connection shaft provided with an eccentric piece. CONSTITUTION:A slanted groove 29 is provided on the left side face of the upper part die 17 and the inclination is formed so as to become deeper gradually toward the lower side from the upper side. In opposition to this groove 29 the clamp lever 33 having the locking face 45 locking to the groove 29 is supported freely turnably to a pin 37 and energized in a clockwise direction by a spring 39. As an unclamping device 23, the connection shaft 49 provided with an eccentric piece 51 is arranged. With this composition the upper part die 17 is fitted and the detaining face 45 of a lever 33 is pushed to the groove 29, then, strongly pinched by a wedge effect, and in case of removing, the die 17 can be changed at one time by rotating the shaft 49 to the right and rotating the lever 33 by the piece 51.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to clamp equipment that reduces bending costs, and more specifically, it cooperates with a lower mold to shape a workpiece into a V-shape or the like. 1
This relates to a device for clamping a mold such as an upper mold for bending to a table.1゜[Technical Background of the Invention and its Problems 1 Conventionally, the workpiece was bent using a press ■culm. (The so-called press plate, which is located in the J5 region and which bends the workpiece into a V-shape etc. with a lower die and 1fil+L, is equipped with a ten-piece joint mold that forms a convex shape such as a V-shape.

In this upper mold, a supporting member and a clamp provided at the lower end of a fixed table hanging down from the upper part of the press body were clamped and fixed by a plurality of fastening members (for example, bolts, etc.).

In this type of clamp, the clamps are removed from or attached to the support member when replacing the mold, so the larger the machine, the more it becomes necessary to operate more clamps.

The number of tightening bolts used to tighten these clamps was large, and it took a lot of time to tighten and loosen them.

Furthermore, since the sleeve bolts are used to attach instruments, for example, there is a problem in that loosening the tightening bolts also causes the instruments to loosen.

In order to solve this problem, a method of clamping or unclamping the mold using a hydraulic cylinder may be considered, but there are inconveniences such as the cylinder body protruding from the clamp and the workpiece hitting the mold when bending. is the current situation.

[Object 1] of the invention The present invention was devised in view of the problem described in 1 above, and its purpose is to provide a clamp structure that uses a wedge effect of +11 as a clamping device for a mold. , 11 type molds can be unclamped at the same time or independently, and can be clamped with simple operation and reliably.
Our objective is to provide a mold clamping device for a bending machine that significantly reduces man-hours.

[Means for solving the problem] In order to achieve the above object, the present invention provides a bending machine with a
If an inclined groove is provided on either side of the mold, II
−, a support part for the mold is provided on the deple supporting the mold;
providing a plurality of clamp members that can be freely engaged and disengaged from the inclined groove;
The present invention is characterized in that each of the clamp members is provided with an operable unclamp member.

[Operation] By adopting the present invention, when clamping a mold, the clamping member provided on the table is rotated and inserted into the inclined groove provided in the mold using a wedge effect, thereby firmly clamping the mold. In addition, when unclamping 7, it is possible to unclamp simultaneously or one after another by rotating or moving a connecting shaft horizontally supporting a plurality of rows of clamp members.

[Embodiment 1] Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

Referring to FIGS. 1 and 2, the press gear 1 is provided with a movable lower table 7 which is moved up and down by a cylinder 5 at the lower part of the machine body 3, and a support member is mounted on the upper part of the movable lower table 7. The lower mold 11 is fixedly attached through the holes 9.

Furthermore, a fixed upper table 13 downstream from the upper part of the fuselage 3
An F section mold 17 is fixed to the lower end Wll of the upper end Wll through a support member 155, and the workpiece to V is bent in cooperation with the upper mold 17 and the lower table 1-u11.

Clamping devices 19J3 and 21 for fixing the two-part mold 17 and the lower mold 11 are provided at multiple locations, such as unclamping that is connected to and horizontally connected to clamp equipment 19 from multiple countries. device 23 is installed).

Next, the clamping device 19 and unclamping device 23 according to the present invention will be explained in more detail with reference to FIGS. 3 to 5.

As shown in FIGS. 3 and 4, the clamping device 19 includes members 15aLB and 15b that constitute the support member 15 (one part not shown) provided at the lower end of the fixed table 13. Fasten with bolt 25. ＼The upper mold 17 is loosely inserted; forming C 27.

An inclined groove 29 is installed on the left side of the upper mold 17 at J5 in FIG.
Rear width of 7; side: In Fig. 4, the slope gradually deepens from the upper side to the lower side.

A clamp lever 33 constituting a clamp member 31 that engages with this inclined groove 29 is rotatably supported on a bin 37 provided on the support member 15b or horizontally suspended over the missing item 35.

Note that a tensioned spring 39 is attached to the bottle 37, and one free end of the spring 39 is locked to a bottle 41 provided on the support member 15t) or planted on the side of the missing item 35, and the other end is attached to a clamp lever. -33, and constantly biases the clamp lever 33 clockwise in FIG.

With the above configuration, the engaging 1L surface 45 provided on the clamp lever 33 presses the inclined groove 29 and strongly clamps the upper mold 17 by a wedge effect.

As shown in FIGS. 3 to 5, the unclamp device 23 is disposed above one of the above-mentioned clamp devices, and is provided on a clamp lever 33 that is the clamp member 31 of the clamp devices 19 arranged in multiple rows. A horizontal connection 49 is provided so as to be able to engage and disengage from the arm portion 47.

The connecting shaft 49 is provided with eccentric barrels 51 corresponding to the clamp levers 33 at multiple locations, and is rotatably and laterally supported by bearings 53 provided at multiple locations via bearings 55.
It is. Further, a handle 57 is attached to the shaft end of the connecting shaft 49.

When covering the unclamp with the above configuration, handle 57
is operated to move the eccentric cylinder 51 provided on the connecting shaft 49 from the two-dot chain line section to the solid line section shown in FIG.

Thereafter, by rotating the connecting shaft 49, the outer periphery of the eccentric barrel 51 comes into contact with the arm portion 47 of the clamp lever 33,
Turn the clamp lever 33 for only 8 products in the opposite direction J1 in FIG. 4 against the elastic force of the spring 39! IIJno. As a result, the locking surface 45 of the clamp lever 33 separates from the single ridge 29 of the upper mold 17, and the clamp 1,) is released. The entire F section mold 17 can be replaced in one operation.

Also, if necessary, move the connecting shaft 49 to disengage the U spacer 51 and the array 11 portion 47 of the clamp lever 33 (the third
The molds can be individually unclamped by moving to the position indicated by the chain line in the figure (1j) and pulling the arm portions 47 of the individual clamp members 31.

J3, FIG. 6 d3 and FIG. 7 show a configuration for clamping or unclamping a plurality of divided upper IS molds 17, and since the constituent members are exactly the same as those in the above-mentioned embodiment, detailed explanations are omitted. do. Note that) the movement of the leakage barrel 51 during non-clamping is shown by a chain line and a solid line.

Furthermore, FIG. 8 shows another embodiment of the clamping device, in which the joint part between the locking part of the clamp lever and the inclined groove meets the processing requirements.
When the 1″N corridor is not filled, an eccentric bushing 59 is attached to the pivot point of the crank lever 33.

By rotating this eccentric bushing 5≦) and adjusting the center of rotation of the clamp lever 33, ≠Φ≠≠ is attached to the locking portion 45 of the clamp lever 33 and the upper mold 17. The junction fα with the profit 29 can be made ideal.

It is possible to change the mold with simple movements.

J3, don't mention this example! St! Although we have explained the case of a type in which the upper mold is bent by applying -L, it can also be used in the case of a type in which the upper mold is subjected to bending. Although we have explained the mold, it can also be used for the lower mold.

[Effects of the Invention] The present invention, from the above description of the embodiments! As can be seen, in addition to the clamp configuration that utilizes the punching effect, operating the connecting shaft with one single core cylinder allows all the molds to be replaced at once, and the simple parts configuration [1] The mold can be reliably clamped or unclamped with Tsunaka Tsumugi Hatsun.

In addition, by using J, REPO, and ANK in one Y5 light, it is possible to significantly reduce the number of times required for mold exchange and improve productivity.

4. Drawing (1) i! n Q”j 7Jl Ming 1st figure J
3 and 2 show a press brake embodying the present invention, with FIG. 1 being a front view and FIG. 2 being a surface view taken along the line ■-■ in FIG. 1.

3 to 5 show the implementation of the clamping device and unclamping device according to the present invention, FIG. 3 is a front view showing the main parts, and FIG. 4 is a section IV-IV of FIG. 3. A sectional view taken along the line, and FIG. 5 is a front view showing the rest.

Figures 6 and 7 show an embodiment in which the clamping device and unclamping device according to the present invention are separated into a type a type device in L/, where FIG. 6 is a front view and FIG. vi -v
FIG. 3 is a cross-sectional view taken along the i-line.

FIG. 8 is a sectional view of a main part showing another embodiment.

[Explanation of the symbols representing the main parts of the drawing] 15...Supporting member 17...One upper mold...Clamping device 29...Slope 31...Clamp part shrine 33.
... Clamp lever 49 ... Connection shaft 51 ...
・-Kokokoma Agent Patent Attorney Yasuo Miyoshi ′ i Yumi [-口1st WJ 2nd rM He ■ i Figure 6 Figure 7

Claims (4)

[Claims] (1) An inclined groove is provided on either side of the mold in the bending machine, a support part for the mold is provided on the table that supports the mold, and a plurality of clamp members that can be freely engaged and disengaged from the inclined groove are provided. A mold clamping device for a bending machine, characterized in that an unclamping member is provided and can simultaneously operate each of the clamping members. (2) The unclamping member is comprised of a plurality of eccentric pieces fitted and horizontally mounted on a connecting shaft and an unclamping lever, and the eccentric pieces are movably connected to the clamping member. A mold changing device for a bending machine according to scope 1. (3) The clamp member includes a clamp lever pivotally supported by a pin on a support portion, a locking portion that locks in the inclined groove on the clamp lever, and a portion of the clamp lever that is interlocked and connected to an unclamping member. 2. A mold changing device for a bending machine according to claim 1, comprising an arm. (4) The inclined groove of the mold is inclined so that the side in the direction in which the mold is removed from the support part is deeper, the clamp member is in rotational biased contact with the inclined groove, and the eccentric piece is attached to the arm. 2. The mold clamping device for a bending machine according to claim 1, wherein the clamping member is detached from the inclined groove when the clamping member is moved away from the inclined groove.