JP2617065B2 - Upper mold for 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 press brake upper die for deep bending a plate-like work material.

[0002]

2. Description of the Related Art Conventionally, when a plate-like work material W is deeply bent by a press brake to form a tubular shape or the like, as shown in FIG.
5, 305 are provided, a space 307 is provided between the holders, and the upper die 303 and the lower die 3 attached to the holder 305 are provided.
09, the work material W is inserted into the space or the window 3 when the work material W is deeply bent.
I was going to enter 09. Then, after bending, both ends of the bent workpiece W are opened, removed from the press brake, and then closed again to form a cylinder. Alternatively, as shown in FIG. 7, a long and thin upper mold 313 is attached to a press brake frame 311, and a plate-like work material W is inserted between the upper mold and the lower mold 315 to form a work material. Is bent until the work material W comes into contact with the upper die, and after being removed from the press brake, the bending angle is further increased by another device to form a cylinder or the like.

[0003]

As described above,
The conventional press brake provided with a space or a window has a problem that it is difficult to remove the work material W from the press brake after bending. Further, there is a problem that since the bending cannot be completed completely with a press brake having no window, a large amount of labor is required for subsequent processing. Furthermore, since the length of the upper die cannot be adjusted according to the width of the work material, there is a problem that a bending defect due to the bending at the time of bending the upper die must be solved.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention relates to a press brake in which both ends are detachably supported by a pair of upper die holders which are separately mounted on a frame of a press brake. In the upper mold for a press brake comprising an upper mold of a shaku, a lower mold body holding surface of the upper mold holder is provided with a concave mold holding surface for engaging and holding the upper mold, A pair of claws provided with an upper die holding surface for pressing and holding the upper die against the die holding surface are provided on the holder main body, and the upper die holding surfaces of the pair of claws are always attached to the upper die. An elastic member is provided for urging the pressing member.

[0005]

When bending a plate-like work material, the upper mold holder is fixed at an appropriate position in accordance with the width of the work material, and deep bending is performed in such a state that the work material surrounds the upper mold. When removing the work material formed into a cylindrical shape by deep bending from the press brake, loosen the support of the upper mold holder and move the upper mold to one side.The upper mold inside the work material is pulled out and the work is removed. The material can be removed from the upper mold.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the press brake 11 has a cross beam 15 provided below the upper frame 13.
An intermediate plate 21 for mounting an upper mold holder 19 for supporting the upper mold 17 is mounted at an appropriate position.
Although a plurality of intermediate plates are provided in FIG. 1, one using a series of long intermediate plates may be used.

A lower die 31 is fixed on a base 33 via a jig 35 at a position corresponding to the upper die 17. An operation panel 3 is provided at an appropriate position of the press brake.
7 and a display CRT 39 are provided.

FIGS. 2 to 4 show the upper mold holder 19 and the intermediate plate 2.
FIG. 3 is a diagram showing details of a relationship 1; As shown in FIGS. 2 and 3, the intermediate plate 21 is firmly fixed to the cross beam 15 with screws or the like. As shown by a dashed line in FIG. 4, the intermediate plate 21 has a holding portion 41 provided at a lower portion.

As shown in FIG. 4, the upper mold holder 19 includes a holding portion 43a provided on the upper portion of the holder body 43 for holding and holding the holding portion, an auxiliary plate 45 for holding, and a screw 4.
The clamped portion 41 is clamped and fixed by the clamp lever 7 and the clamp lever 49. A guide (not shown) is provided on the holding portion 41, while a slider (not shown) is provided on the upper mold holder 19, and the pair of upper mold holders 19, 19 can be arranged at arbitrary positions and intervals. It is provided so as to be fixable.

Further, a mold holding portion 51 for accurately holding and fixing the upper mold 17 at a predetermined position is provided below the upper mold holder 19. The mold holding portion 51 is provided with a concave mold holding surface 43 provided at a lower portion of the holder main body 43.
b is provided so that the upper mold 17 can be accurately held by the pair of claws 53. That is, the center of the upper mold is not shifted as shown in FIG. 5 (A) or tilted as shown in FIG. Can be

A washer (not shown) may be provided between the mold holding surface 43b and the upper mold to hold various upper molds.

The pair of claws 53 are swingably supported by a connecting plate 55, and a compression spring 57 as an elastic member is provided on an upper portion so that a force acts outward. Also, the upper mold holding surface 5 of the claw 53
3 a is provided so as to be in contact with the surface of the upper die 17. Further, the pair of claws 53 presses the upper portions thereof against the urging force of the elastic member, thereby maintaining the holding surface 53a in an open state, so that the upper mold can be pulled out in one direction. I have.

Since the present embodiment is constructed as described above, when bending a flat work material W to form, for example, a cylinder, the upper mold holder 19 is first fitted to the width of the work material W. Is fixed at an appropriate position as shown in FIG. 2, the workpiece W is bent at an appropriate pitch to form a cylinder,
After the cylinder forming process, the mold holding portion is slightly opened, and as shown in FIG. 3, the upper mold is pulled out in one direction to remove the formed product.

[0014]

As will be understood from the above description of the embodiments, the present invention is essentially a pair of upper die holders (19) which are mounted separately on a frame in a press brake.
The long upper die (1
7) In the upper mold for a press brake, comprising: a concave-shaped die holding member for engaging and holding the upper die (17) below the holder body (43) of the upper die holder (19). A pair of claws having an upper mold holding surface for pressing and holding the upper mold (17) against the mold holding surface (43b) are provided on the holder body (4).
An elastic member is provided to support the upper mold (17) so as to constantly press the upper mold holding surfaces of the pair of claws against the upper mold (17).

As is apparent from the above configuration, in the present invention, both ends of the long upper die 17 are detachably supported by a pair of upper die holders 19 which are mounted separately from the frame in the press brake. The upper die 1 is provided below the holder body 43 in the upper die holder 19.
A concave mold holding surface 43b for engaging and holding the mold 7 is formed. A pair of claws for pressing and holding the upper mold 17 against the mold holding surface 43b are formed by the urging action of the elastic member. The upper mold holding surface of the claw is always pressed against the upper mold 17.

Therefore, according to the present invention, the upper die 17 is always urged upward by the urging action of the elastic member, and the upper die 17 is held between the die holding surface 43b of the holder body 43 and the upper die 17. It is always in close contact with no backlash or the like. That is, even if there is a slight manufacturing error in the mold holding surface 43b or the upper mold 17 during the manufacturing, the above error can be absorbed and the upper mold 17 can be fixed securely.

According to the present invention, when the claw is pressed against the urging force of the elastic member, the upper mold holding surface of the claw is moved to the upper mold 1.
Since the upper die 17 is released from the position away from the upper die 7, the upper die 17 can be easily detached and replaced by moving the upper die 17 in the longitudinal direction. That is, the upper die 17 can be attached and detached and replaced without using a tool.

[Brief description of the drawings]

FIG. 1 is a schematic view of the entire front of an embodiment to which the present invention is applied.

FIG. 2 is a view showing a state where an upper mold holder is adjusted to a position corresponding to a width of a work material W;

FIG. 3 is a view showing a state in which an upper mold is pulled out in one direction in order to remove a product.

FIG. 4 shows a detailed view of the upper mold holder.

FIG. 5 is a view showing a state where the upper mold is accurately held by the upper mold holder.

FIG. 6 is a view showing one example of a conventional press brake.

FIG. 7 is a view showing one example of a conventional press brake.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Press brake 13 Press brake frame 15 Cross beam 17 Upper die (punch) 19 Upper die holder 21 Intermediate plate 31 Lower die (die) 33 Press brake base 35 Jig 41 Clamping part 43 Clamping part 51 Mold holding part 53 Nail 57 compression spring

Claims (1)

(57) [Claims] 1. An upper press brake comprising an elongated upper die (17) whose both ends are detachably supported by a pair of upper die holders (19) which are separately mounted on a frame of the press brake. In the mold, a concave mold holding surface (43b) for engaging and holding the upper mold (17) is formed and provided below the holder body (43) in the upper mold holder (17); The mold holding surface (43b)
A pair of claws having an upper mold holding surface for pressing and holding the upper mold (17) are provided on the holder body (43), and the upper mold holding surfaces of the pair of claws are fixed to the upper mold ( 1
7) An upper die for press brakes, characterized by comprising an elastic member for urging to constantly press the die.