JPH02133199A - Press equipment for bending peripheral edge of work - Google Patents

Abstract

PURPOSE:To bring an end edge of a work to bending in accordance with a design change without using a new die by constituting a press equipment for bending a peripheral edge of the work of a frame held by a balancer, a guide rail for guiding the frame after the profile of a peripheral edge shape and always positioning a forming part in the peripheral edge of the work and a pedestal for supporting the work. CONSTITUTION:At the time of bringing a work 23 to bending and press and form a front fender of an automobile, etc., the work 23 is placed on a pedestal 22, a work end edge 23a is placed on a die 12 and a punch 8 is allowed to descend and an end edge 23a of the work 23 is bent, and subsequently, the punch 8 is allowed to ascend, and thereafter, a frame 2 is moved by width of the punch 8, the punch is allowed to descend again, and the end edge being adjacent to the end edge which is worked previously is bent. By repeating this operation, the peripheral edge of the work of necessary length is bent. During that time, the frame 2 is guided by a guide rail and a forming part is always positioned in the peripheral edge of the work, and also, the frame 2 is moved lightly by a balancer 15.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a press device for bending the periphery of a workpiece.

b. Conventional technology Many of the interior and exterior parts of automobiles are press-formed.

For these parts, for example, a front fender, the whole part is first formed primarily to form the central part of the workpiece, and then the peripheral part of the workpiece is bent by the whole part forming.

Problems to be Solved by the C0 Invention By the way, in the above-mentioned image forming, overall forming is employed.

Therefore, when changing the design of a part, it is necessary to create not only a new mold for molding the central part of the workpiece, but also a new mold for molding the peripheral part of the workpiece.

This will lead to an increase in costs when producing parts in small quantities.

Therefore, an object of the present invention is that the peripheral edge of the workpiece has a simple shape and does not necessarily require the entire shape to be formed during bending. An object of the present invention is to provide a general-purpose press device that enables bending of parts.

d. Means for Solving the Problems The press device for bending the periphery of a workpiece according to the present invention has a frame held by a balancer, the frame is guided by following the shape of the periphery of the workpiece, and the forming part is constantly aligned with the periphery of the workpiece. It includes a guide rail for positioning the workpiece, and a pedestal for supporting the workpiece.

e. Function: In the press device for bending the peripheral edge of a workpiece according to the present invention, the workpiece is placed on the pedestal, the edge of the workpiece is positioned on the die,
The punch is lowered to fold the edge of the workpiece, then the punch is raised, the frame is moved by the width of the punch, and the punch is lowered again to fold the edge adjacent to the previously worked edge. bend. By repeating these operations, the workpiece circumference of the required length is bent. During this time, the molding part is always positioned at the periphery of the workpiece by the guide rails of the frame, and the frame can be easily moved by the balancer.

f. Embodiment FIGS. 1 to 3 show a press apparatus for bending the periphery of a workpiece according to the present invention.

A press machine 1 of this press apparatus has a U-shaped frame 2, and a hydraulic actuator 3 is configured on an arm 2a forming the upper part of the frame 2. This hydraulic actuator 3 includes a cylinder 4 formed within the arm 2a.
A piston 5 is disposed in the holder, and the piston 5 is urged upward by a spring 6. The piston 5 has a piston rod 5a extending downward, a punch holder 7 is formed at the lower end of the piston rod 5a, and a punch 8 is fixed to the punch holder 7. As shown in FIG.
It has a. A temporary presser foot 9 is slidably fitted into the punch 8. Inside this temporary presser foot 9, there is a stepped portion 9.
a is formed, and the stepped portion 9a abuts against the stepped portion 8a of the punch 8 to prevent the temporary presser 9 from falling off from the punch 8. Then, this temporary presser foot 9 and punch holder 7
As shown in FIG. 1, a spring 10 is disposed between the holder 10 and the holder 9, and the temporary presser 9 is urged downward by the spring IO. On the other hand, the bed 2 forming the lower part of the frame 2
A die holder 11 is formed in b, and an acid die holder 11
A die 12 is fixed to. This die 12 has a groove 12a having a shape corresponding to the punch 8.

Furthermore, the frame 2 of this press l has a handle 13
The handle 13 is equipped with a switch 13a for operating the switching valve 14a of the hydraulic unit 14 shown in FIG. The hydraulic unit 14 opens the pressure chamber 4a of the hydraulic actuator 3 to the tank 14b when the switch 13a is not operated, and communicates the pressure chamber 4a with the pump 14c by operating the switch 13a and operating the switching valve 14a. Then, the oil in the tank 14b is supplied to the pressure chamber 4a.

Such a press 1 is held by a balancer 15 so as to be movable in the vertical direction (Z direction) and horizontal direction (X-Y direction). This balancer 15 has a frame 16 suspended from a truck (not shown) by wires 17. The frame 16 has a shaft 18, and a pulley 19 having a spiral groove 19a is fixed to the shaft 18. A wire 20 is wound around the spiral groove 19a, and the frame 2 of the press l is
It is held by this wire 20. Therefore, when moving the press 1 up and down, the wire 20 is wound around the pulley 19 or let out from the pulley 19, and the press 1 is always held at an arbitrary position with the same force. Further, the above-mentioned truck is supported by rails extending in the X direction and the Y direction, for example, like an overhead crane, and is driven in any direction by a motor or the like.

Moreover, the press machine 1 can be operated by the guide rail 21
- Guided in the Y-Z direction. This guide rail 21 is
A first guide rail 21a contacts the bottom of the frame 2 of the press 1 and guides the press 1 in the Z direction, and a second guide rail 21a contacts the back of the frame 2 and guides the press 1 in the XY direction. The first guide rail 21a and the second guide rail 21b are each formed to follow the shape of the edge of the workpiece 23.

Further, this press device includes a guide rail 21 and a pedestal 22 arranged at an appropriate interval.

This pedestal 22 is for mounting and holding a workpiece 23, and an upper surface 22a of the pedestal 22 is formed to follow the shape of the workpiece 23.

The operation of the above embodiment will be explained below.

In this bending press device, the upper surface 22 of the pedestal 22
The shape of the upper surface 22a is formed in advance so that the workpiece 23 is placed at the edge of the workpiece, and the surface shape of the first guide rail 21a is formed to follow the front shape of the edge of the workpiece. The surface shape is formed to follow the planar shape of the edge of the workpiece.

Then, the workpiece 23 is placed on the pedestal 22, and the edge 23a
is placed on the die 12 as shown in FIG.

Next, grasp the handle 13 of the press machine 1, move the press machine 1 to the processing start position of the workpiece 23, and turn the switch 1.
Operate 3a-. Then, the switching valve 14a of the hydraulic unit 14 shown in FIG. 3 is operated, thereby supplying oil to the pressure chamber 4a of the hydraulic actuator 3. Therefore, the piston 5 is pressed down, and the temporary presser foot 9 is lowered together with the punch 8. Then, as shown in FIG. 1, the temporary presser 9 presses the workpiece 23 and presses the workpiece 23 against the die 12. When the piston 5 is further depressed, only the punch 8 is lowered while bending the spring 10, whereby the edge 23a of the workpiece 23 is bent as shown in FIG.

When the bending of a portion of the edge 23a of the workpiece 23 is completed in this way, the operation of the switch 13a is released. Then, the switching valve 14a of the hydraulic unit 14 is returned to its original position, and the oil in the pressure chamber 4a of the hydraulic actuator 3 is returned to the tank 14b. Therefore, the piston 5 is moved upward by the biasing force of the spring 6, and the punch 8 is also moved upward accordingly. When the punch 8 is raised by an appropriate amount, the step 8a of the punch 8 comes into contact with the step 9a of the temporary press 9, and the temporary press 9 is pulled up by the punch 8.

Next, the press 1 is moved by the width of the punch 8. Then, when the switch 13a is operated again, the press 1 performs the above operation and bends the edge 23a of the workpiece 23.

By repeating such operations, the edge 23a of the workpiece 23 is bent over the necessary range. During this time, the press 1 is guided by the first guide rail 21a and the second guide rail 21b, and moves the die 12 along the edge 23a of the workpiece 23.

In addition, during that time, the press machine 1 moves on the first guide rail 21a.
The press machine 1 is guided by the balancer 1 and moved up and down.
5, it can be operated easily. Note that the balancer 15 is moved by a truck (not shown) so as to match the movement of the press 1 in the X-Y direction.

8. Effects of the Invention As described above, the press device for bending the workpiece periphery according to the present invention can cope with changes in the design of the workpiece edge without creating a new mold. Regardless of the size, it can be small.

[Brief explanation of drawings]

Fig. 1 is a partially sectional side view showing the main parts of a press device for bending the peripheral edge of a workpiece according to the present invention, Fig. 2 is a partially sectional front view of the device, and Fig. 3 is a hydraulic pressure of the device. The circuit diagram showing the unit, and Figures 4 and 5 are enlarged views of the main parts showing the operation mode of the device. Figure 4 shows its non-operating state, and Figure 5 shows it during processing operation. This is a diagram. 1...Press machine, 2...Frame, 2
a...Arm, 2b...Bear F, 3...Actuator, 4...Cylinder, 4a...Pressure chamber,
5... Piston, 5a... Piston rod, 6... Spring, 7... Punch holder, 8... Punch, 8a... Step part,
9...Temporary press, 9a...Double part,
10... Spring, 11... Die holder,
12...Die, 12a...Groove, 13...Handle, 13a...Switch, 14...
Hydraulic unit, 14a... switching valve, 14
b...Tank, 14c...Pump, 1
5... Balancer, 16... Frame,
17...wire, 18...shaft, 1
9... Pulley, 19a... Spiral groove, 2
0... wire, 21... guide rail, 21a... first guide rail, 21b... second guide rail, 22... pedestal, 22a... top surface, 2
3...Work, 23a...Edge.

Claims (1)

[Claims] A workpiece characterized by comprising a frame held by a balancer, a guide rail that guides the frame following the peripheral shape of the workpiece and always positions the molding part on the peripheral edge of the workpiece, and a pedestal that supports the workpiece. Press equipment for bending the periphery.