JPH0242329Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a mold used for a press brake, and in particular, it is a suitable press brake to easily exchange the upper mold and the lower mold without holding the mold manually. Concerning split type.

[Technical background of the invention and problems with the background technology]

A press brake that bends long objects presses the workpiece between an upper die and a lower die. In this case, the workpiece must be reversed to alternately bend it in opposite directions using the same die.
Since it is difficult to turn the workpiece in the direction of bending if the workpiece is long and large, the upper and lower molds have generally been replaced.

Also, depending on the thickness, shape, or bending angle of the workpiece, the mold may be replaced with another mold that matches the thickness, shape, or bending angle of the workpiece.

As mentioned above, exchanging the upper and lower molds or replacing them with another mold was done manually, but the molds are heavy and heavy because they are made robustly to withstand high press pressure. However, the work of exchanging or replacing the molds requires manpower and time, reduces work efficiency, and is inconvenient and dangerous.

[Purpose of invention]

The present invention is an attempt to solve the above-mentioned problems, and its purpose is to create a split die for the press brake that can easily and safely replace the upper and lower dies without having to hold the dies manually, thereby improving work efficiency. It is about providing.

[Summary of the idea]

In the present invention, an intermediate mold having a plurality of processed surfaces corresponding to the processed surfaces of the upper mold and the lower mold is removably connected to the upper mold or the lower mold by an attachment means, and the It is provided so that press working can be performed between the lower mold and the intermediate mold.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 and 2, an upper mold 1 and a lower mold 3 used for bending a press brake having a plurality of machined surfaces are supported on respective support parts (not shown) of the press brake while facing each other. be done. An intermediate mold 5 is disposed between the upper mold 1 and the lower mold 3 along a direction perpendicular to the pressing direction indicated by an arrow P. The upper die 1 has a machined surface with a concave bending angle E, and the lower die 3 has a machined surface with a concave bending angle F. The intermediate die 5 has two processed surfaces: a processed surface E with a convex bending angle E and a processed surface with a convex bending angle F. A through hole 7 and a through hole 9 are formed in the upper die 1 and the lower die 3, respectively, across the machined surface and along the machine front-rear direction. The intermediate mold 5 has through holes 11 and 1 on two machined surfaces along the machine front and back direction, respectively.
3 is drilled. The two machined surfaces of the intermediate mold 5 closely engage the machined surfaces of the upper mold 1 and the lower mold 3, respectively,
When engaged, the through holes 7 and 11 and the through holes 9 and 13 are formed so as to communicate with each other.

The mounting means 15 is composed of a shaft 17, a plurality of spring pins 19, and a handle 21, as shown in FIG. A spring pin 19 of an appropriate length is attached to the shaft 1.
7 is fixed on top. The handle 21, which has an annular shape on one side, has both ends fitted into both ends of the shaft 17 so as to be rotatable relative to the shaft 17 as shown by arrow Q.

In this embodiment, the spring pins 19 are composed of three pieces. The through holes 7 of the upper mold 1 and the lower mold 3
and through-holes 9 are provided in three blocks or in a number of blocks with three holes in each block, and the intermediate mold 5
Three through holes 11 and three through holes 13 are provided in each block. The position and diameter of each through hole are formed so that the three spring pins 19 can be inserted and removed therethrough.

To bend the workpiece 23 at bending angles E and F as shown in FIG.
Placed between the upper die 1 and the lower die 3, for example, on the fixed lower die 3, with the machined surface of the bending angle F facing the machined surface of the upper die 1 and the machined surface of the bending angle F facing the machined surface of the lower die 3. and arrow P
Apply light pressing pressure along the direction of . When the three molds lightly touch each other, the spring pin 19 of the mounting means 15 is inserted into the through hole 7 of the upper mold 1, and further penetrated through the through hole 11 of the intermediate mold 5, so that the intermediate mold 5 is processed into the upper mold 1. Fix it in close contact with the surface.

Rotate the handle 21 to tilt the upper mold 1 to the front side. The upper die 1 and the lower die 3 are moved in the direction opposite to the direction of the arrow P, the workpiece 23 is inserted between the intermediate die 5 and the lower die 3, and strong press pressure is applied in the direction of the arrow P.
The workpiece 23 is bent between the processed surface of the intermediate die 5 at the bending angle F and the processed surface of the lower die 3 at the bending angle F, so that the bending angle F shown in FIG. 4 can be obtained. Next, the workpiece 23 is removed, the three molds are brought into light contact as described above, the spring pin 19 is removed from the upper mold 1, and the spring pin 19 is inserted into the through hole 9 of the lower mold 3 and the intermediate mold 5.
The intermediate mold 5 is fixed to the lower mold 3 by inserting the intermediate mold 5 into the through hole 13 of the lower mold 3. A workpiece 23 is inserted between the intermediate die 5 and the upper die 1, and strong press pressure is applied in the direction of arrow P. The workpiece 23 is bent between the processing surface of the intermediate mold 5 at the bending angle E and the processing surface of the upper mold 1 at the bending angle E, and then
It is possible to process the bending angle E shown in the figure.

When bending the workpiece 23 in opposite directions at the angle E and the bending angle F as described above, the upper die 1 and the lower die 3 are bent by changing the vertical position of the intermediate die 5 having two bending angles using the mounting means 15. It can be processed without replacing. Moreover, since the trouble of reversing the workpiece can be omitted, the effect of improving work efficiency is increased.

Next, other embodiments will be described based on the drawings.

As shown in FIG. 5, the intermediate die 25 has a machined surface with two concave bending angles, a bending angle G and a bending angle H.

By bending the fixed workpiece by changing the vertical position of the intermediate die 2 into the upper die 27 and the lower die 29, the workpiece can be bent into different bending angles G and H as shown in FIG.

The number of intermediate dies 25 shown above is not limited to one; for example, if two intermediate dies having different processing surfaces are used and connected to each other, three types of bending processes can be performed on the workpiece.

[Effect of idea]

As is clear from the above explanation, according to the present invention,
Processing is performed by changing the positions of the upper and lower molds without manually operating the mold or reversing the workpiece, reducing the effort and time required to change molds and improving work efficiency. be able to.

[Brief explanation of the drawing]

FIGS. 1A and 1B are a front view of the first embodiment of the present invention, a sectional view taken along line B-B of the front view, and FIGS.
B is a front view of the intermediate mold in FIG. 1 with a different position, and a sectional view taken along the line B-B in the front view; FIGS. 3A and B are a front view and side view showing the mounting means; and FIG. Fig. 5 is a sectional view of the second embodiment of the present invention, and Fig. 6 is an explanatory view of the processing state of the workpiece shown in Fig. 5. 1...Upper mold, 3...Lower mold, 5...Intermediate mold, 7,9,1
1, 13... Through hole, 15... Mounting means, 17... Shaft,
19...Spring pin, 21...Handle, 23...Work.

Claims (1)

[Scope of utility model registration request] At least three or more molds consisting of an upper mold, a lower mold, and an intermediate mold interposed between these molds and engaged with the workpiece are arranged in the pressurizing direction, and the intermediate mold is attached to and detached from the upper mold or the lower mold. A split type press brake, characterized in that the intermediate mold is provided so as to be able to vary the vertical position of the intermediate mold, which is freely attached and engaged with the workpiece.