JPS6013549Y2 - Lower mold fixture for press machine - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a lower die fixture for a press machine for reliably fixing and positioning the lower die placed on the table of the press machine.

BACKGROUND ART A press machine called a press brake as shown in FIGS. 1 to 3 has conventionally been used for bending sheet metal used as construction materials.

In the figure, 1 is a press brake, 2 is a table, 3 is a punch,
4 is a lower mold, and this lower mold 4 is formed with a plurality of grooves 6 (three in the illustrated example) for bending the sheet metal 5, and each groove 6 is formed in the lower mold 4.
a, 6 be 6 c have different angles and shapes depending on the bending angle of the sheet metal 5 to be processed.

The punch 3 is inserted into each of the grooves 6 at 6 by 6.
A punch 3 having a tip shape corresponding to the shape of c is prepared, and an arbitrary punch 3 is selected depending on the processing and bending angle of the sheet metal 5, and is attached to the support part 7.

When bending a plate base using such a press brake 1, the sheet metal 5 is placed on the lower mold 4, and the punch 3
The sheet metal 5 is bent within the groove 6 through the pressurized lowering operation.

In order to prevent the lower mold 4 placed on the table 2 from shifting relative to the punch 3 when bending the sheet metal 5, longitudinal shapes are formed on the front surface 8 and rear surface 9 of the table 2. The lower die fixture 11 was held in the groove 10 of the table 2, and the lower die 4 was held and positioned by both the front and rear directions (directions A and B) of the table 2.

That is, this lower die fixture 11 has a plate-like fixture main body 1.
2. An engaging portion 13 that is inserted into the groove 10 on the table 2 side;
The engaging part 13 and the positioning body 14 are attached to the fixture body 12 via bolts and nuts 15 and 16, respectively.

First, adjust the bolts and nuts 15 and fix the fixture body 1.
2 is positioned and fixed at an arbitrary position in the length direction (C direction) of the table 2, and then the bolt/nut 16 is adjusted to move the positioning body 14 in a direction (D direction) intersecting the length direction (C direction) of the table 2. The lower mold 4 was positioned and fixed by moving the lower mold 4.

Two of these lower mold fixtures 11 are provided on the front surface 8 side and two on the rear surface 9 side of the table 2, thereby clamping and fixing the lower mold 4 and preventing the lower mold 4 from shifting. There is.

However, in the conventional lower mold fixing device 11 for a press machine, the lower mold 4 is clamped and fixed by being attached to the front surface 8 and the rear surface 9 of the table 2, respectively.
After bending the sheet metal 5 at point E as shown by the imaginary line in Figure A, continue to bend point F near point E in the opposite direction as shown by the opening in Figure 3. In case, lower die fixture 1
As shown by the imaginary line in the opening of Figure 3, there was a problem that 1 got in the way of the bending work.

For this reason, as shown by the solid line in the opening of Figure 3, when bending point E, it must be bent at an angle of 01 that does not interfere with the subsequent bending work at point F, and then Perform the bending operation, and then perform the bending operation again by bending the E point to the angle θ2, or force the bending angle 02 at the E point to an angle O□ and then bend the F point. Since the bending process was carried out by machining, the work efficiency was poor, and there were various problems such as a decrease in bending accuracy, peeling of the paint, and a decrease in the strength of the bent part if the so-called double bending was performed.

This idea was developed by focusing on the problems with the conventional lower die fixing device for press machines, and it is a method to securely fix and position the lower die placed on the table in a position where it does not interfere with the work. The purpose of this device is to enable efficient work, and specifically, the lower die fixture for a press machine according to this invention can be attached to the end surface of the table of the press machine, and can be attached to the table end face of the press machine. The fixing device has a prismatic fixing device body having a longitudinal groove in a direction intersecting the length direction of the press machine in the state, and a supporting portion that is slidable and engaged with the longitudinal groove of the fixing device body. , the end of the lower mold placed on the table is held on the table end side from the front and back direction when the lower mold is fixed, and the positioning body is configured with a pair of front and rear, overall L-shaped positioning bodies that can freely regulate the position. It was made to make them distant relatives.

This invention will be explained below based on the drawings.

In the following description, parts that are common to those of the prior art are denoted by the same reference numerals, and repeated description will be omitted.

4 to 6 are diagrams showing an embodiment of this invention.

In the figure, 20 is a lower die fixture for a press machine, 21 is a fixture main body, and 22 at 22 b is a positioning body.

The fixture main body 21 has a generally prismatic shape as a whole, and a longitudinal groove 24 is formed on the negative surface 23 in the longitudinal direction (direction C). The fixture main body 21 is attached to the end surface 25 of the table 2 so that the direction (direction C) intersects, that is, intersects at right angles.

The fixing device main body 21 is attached via a pair of bolts 26 and 26, and the longitudinal surface 27 of the fixing device main body 21 is aligned with the end surface 25 of the table 2 [in the case of FIG. The surface 28 is made to run along the end surface 25 of the table 2 (as shown in FIG. 6).

The positioning bodies 22a and 22b are made up of a pair of metal fittings in the shape of an abbreviated character facing each other, and a stud bolt 29 is attached to the back of the metal fittings.
．． A support part 30,30 is provided via 29.

This support 30.30 is engageable in the longitudinal groove 24 of the fixture body 21, thereby allowing the positioning body 22
A, 22b can be slid to adjust the distance W formed by the pair of positioning bodies 22a, 22b.

The end portion 31 of the lower mold 4 placed on the table 2 is clamped and its position is controlled, even when the lower mold 4 protrudes from the table 2 as shown in FIG. Even when the lower die 4 is housed inside the table 2, the lower die 4 can be similarly held and fixed on the end surface 25 side of the table 2.

As explained above, according to this invention, the lower die fixture for a press machine can be attached to the end face of the table of the press machine, and has a longitudinal groove in the direction intersecting the length direction of the table of the press machine. It is equipped with a prismatic fixture body and a support part that is slidable and engages with the longitudinal groove of the fixture body, and when the lower mold is being fixed, the end of the lower mold placed on the table can be moved from the front and back direction. Since it was decided to form with a pair of front and rear positioning bodies that can be clamped and positioned freely on the end side of the table, and the entire shape is in the shape of a letter, the lower die placed on the table does not get in the way of the work on the end side of the table. This allows secure fixing and positioning even when the lower mold protrudes beyond the edge of the table, or even when the lower mold is inside the table, making it easier to bend and position the mold than before. This has the effect that the work efficiency is much improved, and complex machining work that requires precision can be performed reliably.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view showing the entire press brake, and Fig. 2 shows a state in which a lower mold placed on a table is fixed and positioned using a conventional lower mold fixture for a press machine. FIG. 1 is an enlarged perspective view of the middle part, FIG. Fig. 4 is an overall perspective view showing a lower die fixing device for a press machine according to an embodiment of this invention, and Figs. 5 and 6 are a lower die fixing device for a press machine according to an embodiment of this invention. FIG. 6 is a perspective explanatory view showing a state in which the lower die is fixed and positioned with a tool. 1...Press machine [press brake], 2...
...Table, 4...Lower mold, A, B...
...Back and forth direction, C...Table length direction, 1
1, 20...Lower mold fixture for press machine, 21.
... Fixture main body, 22a, 22b ... Positioning body, 24 ... Longitudinal groove, 25 ...
...End face of the table, W... Distance, 31...
...The end of the lower mold.

Claims (1)

[Claims for Utility Model Registration] A prismatic fixture main body that can be attached to the end face of a table of a press machine and has a longitudinal groove in a direction intersecting the length direction of the table of the press machine; The fixture is equipped with a support part that is slidable and engages with the longitudinal groove of the fixture body, and when the lower mold is fixed, the end of the lower mold placed on the table is held between the end face side of the table from the front and rear direction,
A lower die fixing device for a press machine, characterized by a pair of front and rear positioning bodies that are in the shape of an entire letter, and a positioning body that can be freely regulated.