JP2559403Y2 - Bending jig for sheet metal processing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending jig used when a plate-shaped work is bent by a sheet metal working machine.

[0002]

2. Description of the Related Art Conventionally, when a long cylindrical body is bent by a sheet metal working machine such as a press brake, an operation of repeating an R-bending process while sequentially feeding a plate-shaped work at an equal pitch is performed.

[0003]

Conventionally, a plurality of workers hit the front end of a work against a back stop while holding the rear end of the work, and the position of the back stop is moved each time bending is performed once. Then, the abutting operation is repeated again to bend the work into a cylindrical shape. For this reason, the work requires a lot of man-hours and the work efficiency is poor, and the bending end position is determined by repeatedly hitting the front end side of the already bent work against the back stop, so that the pitch feed is repeated. In addition, there was a problem such as that a high-precision bending process could not be performed due to misalignment. The present invention has been made for the purpose of improving the above-mentioned conventional problems, and aims to provide a bending jig of a sheet metal working machine capable of performing the R-bending without requiring an artificial feeding operation. is there.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a backstop for positioning a work bending position in a sheet metal working machine for bending a plate-like work between an upper die and a lower die. A slide table that can be moved up and down by an elevating cylinder is provided on the horizontal rod on which is mounted, and a jig body that is positioned at the origin position by a stopper cylinder is attached to this slide table via a lever so that it can swing freely. The tool main body is provided with clamp claws for clamping the tip of the work.

[0005]

[Work] With the above structure, it is not necessary to hold the work by hand during the bending process, and the jig body moves integrally with the backstop, so that the number of steps for positioning each bending process can be omitted.

[0006]

[Embodiment] An embodiment of the present invention will be described in detail with reference to the drawings. In the drawing, reference numeral 1 denotes a backstop, which is attached to a plurality of horizontal rods 2 provided at the rear of a sheet metal working machine (not shown). The position of the horizontal rod 2 is controlled in the front-rear direction by an NC device (not shown), and the bending position of the work 3 can be positioned by abutting the front end of the work 3 to be bent against the backstop 1. It has become. The bending jig 4 of the present invention is attached to the horizontal rod 2 to which the backstop 1 is attached at a plurality of locations.

That is, a slide 4c is supported on the horizontal rod 2 so as to be movable in the longitudinal direction.
The frame portion 4a is mounted on the upper surface of the frame c. A guide rail 4b is laid vertically on the front surface of the frame portion 4a, and a slide table 6 which can be moved up and down by a lifting cylinder 5 with a lock function mounted on the upper portion of the frame portion 4a is provided on the guide rail 4b. Installed. The slide table 6 has a substantially L-shaped side surface, and a bracket 6a is fixed to the front surface. A bent portion of a lever 7 having a substantially V shape is pivotally supported by a pin 8 on the bracket 6a. I have.

A jig body 10 is pivotally supported on the lower end of the lever 7 by a support shaft 9 so as to be rotatable about the support shaft 9. The jig body 10 has a stopper cylinder 12
The end of the piston rod 12a of the stopper cylinder 12 is in contact with the upper end of the lever 7, and the lever 7 is rotated counterclockwise around the pin 8 by the stopper cylinder 12. A stopper 10a protruding from the upper part of the jig body 10 is provided on the reference surface 6b of the slide 6, and a reference block 10b protruding from the lower part of the jig body 10 is provided on an origin positioning pin provided on the lower part of the slide 6. 13.

On the other hand, a clamp claw 15 for clamping the work 3 is provided at a lower portion on the front side of the jig main body 10.
The clamp claw 15 is, as shown in FIG.
And a lower claw body 15b, which is pivotally connected by a pin 16, and the tip end of which can be freely opened and closed in the vertical direction around the pin 16. The base end of the lower claw body 15b is a shaft rod 1.
7, and both ends of the shaft rod 17 are fitted to a bearing portion 10d provided at a lower portion of the jig main body 10, and divided blocks 10e, 10e, provided on the bearing portion 10d.
10 f is tightened by the clamp bolt 18, so that both ends of the shaft rod 17 are fixed to the jig main body 10. A screw shaft 18 having a clamp lever 18a is screwed to the base end of the upper claw body 15a.
8 is in contact with the base end of the lower claw body 15b,
By rotating the screw shaft 18 by the clamp lever 18a, a clamping force is generated between the upper and lower claw bodies 15a, 15b.

Next, the operation will be described. A work 3 to be bent into a cylindrical shape by a sheet metal working machine is inserted from the near side of the sheet metal working machine, and its tip abuts against the backstop 1 to position the first bending work. Then, the tip of the work 3 is inserted between the upper and lower claw bodies 15a and 15b of the clamp claw 15 provided at the front part of the jig main body 10, and the screw shaft 18 is tightened by the clamp lever 18a. Body 1
The tip of the work 3 is clamped between 5a and 15b. The jig body 10 is moved in advance to the slide table 6 side by the stopper cylinder 12, is positioned at the origin position by the stopper 10 a and the origin positioning pin 13, and when the work 3 is clamped to the clamp claw 15, the stopper cylinder 1 is moved.
By releasing the pressure of 2, the jig main body 10 can freely rotate around the support shaft 9.

Then, in this state, the upper die (punch), not shown, of the sheet metal working machine is lowered to start bending the work 3 with the lower die (die). Or a weak pressure is supplied to the rod side to urge the slide table 6 upward with a slight force. As a result, the jig body 10 is rotated counterclockwise about the support shaft 9 following the bending of the work 6 between the upper and lower dies, and the slide table 6 is moved together with the jig body 10. To rise. Thereafter, the upper die reaches the bottom dead center, the bending process is completed, and the upper die starts ascending. At the same time, the elevating cylinder 5 with the lock function is locked and the slide table 6 is temporarily locked at that position.

Thus, even if the work 3 is released from between the upper and lower dies, the work 3 does not flutter and the positioning position does not shift. When the upper die returns to the top dead center, the slide table 6 and the jig main body 10 are returned to the home position by the lifting cylinder 5 and the stopper cylinder 12, and then the backstop 1 is moved to the next indexing position and the workpiece 3 is moved. After performing positioning and repeating the above operation, work 3
Is bent into a cylindrical shape, and the jig 4 of the present invention holds the tip of the work 3 during the bending, so that it is not necessary for an operator to hold the work 3.

[0013]

[Effects of the Invention] As described in detail above, this invention uses the jig provided at the backstop to grip the tip of the work being bent by the sheet metal processing machine. There is no need for the operator to hold the work until the operation is completed. Thus, even when a long workpiece is bent into a cylindrical shape, the bending can be performed safely and efficiently. Also, since the backstop and the jig move together, there is no need to hit and position the workpiece against the backstop each time bending is performed as in the past, so that complicated positioning work can be omitted, and the bending process is already performed. Since the positioning accuracy is higher than that of the conventional one in which the end of the completed work is brought into contact with the backstop and positioned, a highly accurate bending process can be performed.

[Brief description of the drawings]

FIG. 1 is a side view of a bending jig showing an embodiment of the present invention.

FIG. 2 is a plan view of a bending jig showing one embodiment of the present invention.

FIG. 3 is a rear view of a bending jig showing one embodiment of the present invention.

FIG. 4 is an enlarged side view of a main part of a bending jig showing one embodiment of the present invention.

FIG. 5 is a view as viewed from an arrow X direction in FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Back stop, 2 ... Horizontal rod, 3 ... Work, 5 ... Elevating cylinder, 6 ... Slide table, 7 ... Lever, 10 ...
Jig body, 12: stopper cylinder, 15: clamp claw.

Claims (2)

(57) [Scope of request for utility model registration] 1. In a sheet metal working machine for bending a plate-shaped work 3 between an upper die and a lower die, a horizontal rod 2 to which a back stop 1 for positioning a bending position of the work 3 is attached.
In addition, a slide table 6 that can be moved up and down by an elevating cylinder 5 is provided, and a jig body 10 that is positioned at an origin position by a stopper cylinder 12 is attached to the slide table 6 via a lever 7 so as to be swingable. Clamp claw 1 for clamping the tip of work 3 to tool body 10
5. A bending jig for a sheet metal working machine provided with 5. 2. The bending jig according to claim 1, wherein a cylinder with a lock function capable of locking the lift cylinder 5 at an arbitrary position is employed.