JPH0790280B2 - Structure of press die attached to ram in press brake - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a press die 1 mounted on a ram of a press brake.

[0002]

2. Description of the Related Art There are various types of press dies to be mounted on a ram of a press brake, corresponding to the forming dies.
Since it is uneconomical to prepare all of the expensive press dies, many persons skilled in the art actually have several types of make-up presses in order to make it in time. In addition, regardless of which press die is used, a molded product having a narrower gap than the shape of the blade mold is regarded as a non-target product because it cannot be demolded as it is.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and the press die 1 is composed of a plurality of members, and particularly, the blade die member is easily detached, and the punching die It is possible to demold a narrow molded product, facilitate deep bending, and change the position of the blade member so that four cutting edges can be switched and used. The present invention provides a press die which improves the productivity, improves the accuracy of the product, and is economical.

[0004]

In order to achieve the above object, a press die 1 mounted on a ram in a press brake according to the present invention comprises a pair of mounting arms 3 each having a right-angled triangular groove 3a formed at a lower end thereof. 3 and two sides of the right-angled triangular groove 3a
And a claw on the inside of the lower end that is detachably attached to both side surfaces of the mounting arms 3 and 3 for biting the blade member 2 in the right-angled triangular groove 3a. Four
It is composed of a pair of holding plates 4 and 4 formed by bending a.

In the embodiment shown in the drawings, a pair of holding plates 4, 4 are detachably attached to both side surfaces of the mounting arms 3, 3.
Is fastened via a bolt 5 having a wrench hole 5a in the head. Further, a small space 3b, 4b, 4b for allowing the blade edge of the blade member 2 to escape is provided at the apex of the right-angled triangular groove 3a of the mounting arm 3 and inside the lower ends of the pair of holding plates 4, 4, to protect the blade edge. I am doing it. In the figure, 3c, 4c are through holes for bolts 5, 4d are female screw holes for bolts 5, 6 is a mounting plate for the ram,
7 is a fastening bolt.

A side view in the assembled state is shown in FIG. 1, a side view in the disassembled state is shown in FIG. 2, and a perspective view of the press brake mounted on a ram is shown in FIG.

[0007]

Now, the case of forming a channel having a narrow cross section will be described with reference to the working process shown in FIG. . (B) The blade-shaped member 2 having a square cross section descends. This creates a bend at one end. After forming, the blade type member 2 rises. (C) The material plate S is replaced in the opposite direction and abutted on the jig G. (D) The blade-shaped member 2 having a square cross section descends. This forms a bend at the other end. After forming, the blade type member 2 rises. (E) The material plate S having bent portions at both ends is beveled Y
Abut on the jig G that has been retracted by a predetermined distance along the upper surface of. (F) The blade member 2 having a square cross section descends. This creates a deep bend in the middle near one end. After forming, the blade type member 2 rises. (G) The material plate S is replaced in the opposite direction and abutted on the jig G. (H) The blade member 2 having a square cross section descends. This creates a deep bend in the middle near the other end. The previously processed one end side also flips up to surround the blade-shaped member 2 to form a cross-sectional channel mold.

In this state, since the gap between the channel type cross sections is narrower than that of the blade type member 2, the die cannot be removed. Then, the bolt 5 is loosened (it is not necessary to completely disassemble) and the blade-shaped member 2 is laterally extracted to take out the molded product. Further, during the above work, when one blade edge (for example, 2a) of the blade-shaped member 2 having a square cross section is worn, the blade-shaped member 2 is replaced by 9
It is assumed that the work is continued by rotating it by 0 degree and changing the other cutting edge (for example, 2b).

[0009]

As described above, according to the present invention, a single press die can process molded articles of various shapes including a narrow punch and a deep bend, which have not been able to be released from the past. .
In addition, since the blade tip can be switched and used at four points by changing the position of the blade die member, it is possible to save the trouble of exchanging the press die with each wear of the blade tip, and to ensure the accuracy of the product. desirable. Then, the work of releasing the narrow molded product or changing the position of the blade member is performed by the mounting arms 3 and 3.
Which can be carried out only by loosening the fastening of the pair of holding plates 4 and 4 which are directed to both side surfaces of the bolt (in the example, by fitting a wrench into the wrench hole 5a of the head of the bolt 5 and turning it appropriately). Therefore, it is extremely quick and easy. And these advantages bring about diversification of work, improvement of efficiency, and maintenance of product precision, and the economic effect is extremely large.

[Brief description of drawings]

FIG. 1 is a side view of an assembled state.

FIG. 2 is a side view of a disassembled state.

FIG. 3 is a perspective view of a press brake mounted on a ram.

FIG. 4 is a schematic side view showing a work process according to the present invention step by step.

[Explanation of sign]

 1 Press Die 2 Blade Section Member with Square Cross Section 2a Blade Edge 2b Blade Edge 2c Blade Edge 2d Blade Edge 3 Mounting Arm 3a Right Angled Triangular Groove 3b Space to Relieve Blade Edge 4 Clamping Plate 4a Space to Relieve Blade 4b Blade 5a Wrench Hole 6 Mounting plate for 7 Fastening bolts

Claims (3)

[Claims] 1. A pair of mounting arms (3), (3) each having a right-angled triangular groove (3a) formed at a lower end thereof, and a blade member (2) having a square cross section having two sides which match the right-angled triangular groove (3a). 2)
And a pawl (4a) inside the lower end which is detachably attached to both side surfaces of the mounting arms (3) and (3) for biting the blade-shaped member (2) in the right-angled triangular groove (3a). A structure of a press die (1) attached to a ram in a press brake composed of a pair of holding plates (4) and (4) formed by bending. 2. A pair of holding plates (4), (4) detachably attached to both side surfaces of the mounting arms (3), (3) includes a bolt (5) having a wrench hole (5a) in its head. The structure of a press die (1) mounted on a ram of the press brake according to claim 1, which is fastened via the press die. 3. The edge of the blade member (2) is slightly released to the apex of the right-angled triangular groove (3a) of the mounting arm (3) and the insides of the lower ends of the pair of holding plates (4) and (4). Space (3
b), (4b), (4b) provided, the structure of the press die (1) mounted on the ram in the press brake according to claim 1 or 2.