JPS6016420Y2 - Angle correction device in press brake - Google Patents

Description

[Detailed description of the invention] This invention relates to an angle correction device for a press brake, and more specifically, an angle correction device provided with an angle adjustment device that can adjust a mold adjustment member vertically and tiltably. It is related to the device.

Conventionally, an upper apron that can be raised and lowered relative to a lower apron,
In press brakes, etc. that bend plate materials (workpieces) using fixed tables fixed to the left and right lower aprons, the upper apron bends upwards due to the pressing force, and the lower apron also bends downwards in response to the bending of the plate material. When it is bent, there is a problem that a difference in bending angle occurs between the center portion and the left and right portions due to the amounts of both bending, and the bending angle of the center portion is an obtuse angle compared to the left and right portions.

Further, the above-mentioned combined amount of deflection in the vertical direction varies depending on the applied force, and even if the applied force is the same, the amount of deflection also differs when the bending length is different.

Therefore, it was necessary to make adjustments each time in response to changes in material, plate thickness, length, etc.

For example, conventionally, as an adjustment means, the deflection was corrected by moving the mold adjusting member up and down, but since the base of the mold adjusting member only moves up and down while maintaining its horizontal position, the deflection correction curve High-precision correction along the lines was not possible.

This invention was devised in view of such conventional problems, and its purpose is to perform complete correction along the deflection correction curve by adjusting the adjustment member vertically and tiltably. An object of the present invention is to provide an angle correction device for a press brake that can effectively prevent the so-called hollowing phenomenon during processing and can obtain folded products with high precision.

Hereinafter, a preferred embodiment of this invention will be described based on the accompanying drawings.

FIG. 1 shows a schematic front view of a press brake 1 equipped with an angle correction device implementing this invention. A lower mold 7 is provided, and an upper mold 15 is suspended above the lower mold 7 via a plurality of plates 11 and a mold adjustment member 13 attached to an upper apron 9 (supporting member). ing.

Next, a plurality of angle correction devices 17 according to this invention are provided on the plate 11 at predetermined intervals.

This angle correction device 17, as shown in FIGS. 2 and 3,
The mold adjusting member 13 and the plate 11 from which the mold adjusting member 13 is suspended are provided.

Further, this plate 11 has circular holes 19a and 19b.
are formed at predetermined intervals.

The plate 11 has a fastener 21a1 and a bolt 2.
It is attached to the lower part of the upper apron 9 via 1b.

Further, the dowel 23 engaged with the lower surface of the upper apron 9 is attached to the plate 11 via bolts 27, 27 passing through elongated holes 25, 25 provided in the plate 11.

Note that the abutment 23 is adjusted up and down by the elongated holes 25, 25.

Further, the mold adjusting member 13 is attached to the lower part of the plate 11 via a bolt 31 with a predetermined gap 29 for adjusting the amount of deflection separated from the stopper 23, and this bolt 31 is similar to the above. Since the mold adjustment member 13 passes through a long hole 31a provided in the plate 11, the mold adjustment member 13 can be adjusted up and down.

Note that the gap 29 is configured to be located at the center of the circular holes 19a, 19b provided in the plate 11.

Further, arc-shaped recesses 33a and 33b are formed on the lower surface of the stopper 23 and the upper surface of the mold adjusting member 13, respectively, and circular holes are formed opposite to the holes 19a and 19b.

The holes 19a, 19b and the arc-shaped recesses 33a, 33
Inside b, a first adjustment member 37 is provided with an arcuate head 35a that slides on the inner circumferential wall of the recess 33a, and has a slope 35b on the lower surface, and a slope 35 of the first adjustment member 37.
and the recessed portion 33b.
The second adjustment member 4 includes an arcuate bottom portion 39b that engages with the second adjustment member 4.
1 are slidably inserted.

An L-shaped flange portion 45 having a guide hole 43 is integrally provided at the tip of the first adjusting member 37 .

Further, an adjustment bolt 47 whose tip end is threadably connected to the second adjustment member 41 is rotatably inserted into the guide hole 43 provided in the flange portion 45 .

An upper mold 15 is attached to the lower part of the mold adjusting member 13 via a fastener 51 and a pole 1-53.

Next, some of the adjustment effects of this embodiment, which are avoided due to the above-described configuration, will be explained.

First, when adjusting the deflection of a predetermined position of the upper mold 15 according to the processing state of the workpiece W, the circular hole 19
When the adjustment bolt 47 provided in a is rotated, for example, clockwise, the second adjustment member 41 moves rightward in FIG. 2 along the inclined portion 35b of the first adjustment member 37, and at the same time , the distance between the gaps 29 increases in the vertical direction.

Similarly, by adjusting the adjustment bolt 47 provided in the hole 19b, the distance between the gaps 29 is expanded in the vertical direction, and at the same time, the mold adjustment member 13 is adjusted to match the inclination angle of the deflection correction curve. Adjust to the same angle of inclination.

Further, by making the same adjustment as above for each plate 11, a predetermined position of the upper mold 15 is deflected toward the lower apron 3 along the deflection correction curve.

In this way, by sequentially adjusting the angle adjusting devices 17 provided on each plate 11, the upper mold 15 can be accurately adjusted along the bending curve.

Conversely, if you turn the adjustment bolt 47 counterclockwise,
The second adjustment member 41 moves leftward in FIG. 2, and as a result, the gap 29 becomes narrower and the upper mold 15 returns to its original position by the elastic force of the material.

Next, FIGS. 4 and 5 show another embodiment, in which a fixing member 55 is attached to a bolt 5 at the tip of the first adjusting member 37.
7.57.

This ensures the fixation of the first adjusting member 37 and further prevents the displacement of the sliding contact portions of the first and second adjusting members 37 and 41.
This can be corrected by rotating the fixing member 55.

Further, the threaded portion 47 into the adjustment hole 1 is provided at the same angle of inclination as the inclined surface 39a of the second adjusting member 41, and furthermore, the second adjusting member 41 is provided with the same slope as the inclined surface 39a. A corner scale plate 59 is integrally provided, and is configured to be able to measure the amount by which the gap 29 between the mold adjusting member 13 and the stopper 23 widens.

Note that other structural functions are the same as those of the first embodiment, so detailed explanations will be omitted.

Further, the mold adjustment member 13 in the above embodiment is not limited to being provided in the upper mold 15, but can also be provided in the lower mold 7 or even in the upper and lower aprons 3 and 9 with a gap formed therein. Furthermore, the number of circular holes 19a and 19b formed in the plate 11 is not limited to two,
It is also possible to provide more than that.

When the mold adjustment member 13 is provided in these, the same operation can be performed by interposing the first and second adjustment members 37 and 41 similar to those described above.

As can be understood from the above description of the embodiments, the gist of the invention is as stated in the claims for utility model registration, and as is clear from the description, the present invention A stopper and a mold adjustment member are attached to each of the plurality of plates arranged in the plate, and between the vicinity of both sides of the said stopper and the vicinity of both sides of the mold adjustment member, there is a plate inclined in the front-rear direction. The first surface is in contact with the inclined surface.
A second adjustment member is interposed.

Therefore, by adjusting the first and second adjusting members, it is possible to adjust the approach and separation position of the mold adjusting member with respect to the stopper, and also by adjusting the first and second adjusting members on both sides. By varying the amount of adjustment, the mold adjusting member can be adjusted to be tilted upward to the right or upward to the left with respect to the die.

Therefore, by appropriately adjusting the amount of adjustment of each mold adjustment member on each plate arranged in the left and right direction at multiple locations on a support member that is long in the left and right direction, the mold supported by the plurality of mold adjustment members can be adjusted. The deflection can be adjusted in a smooth continuous arc shape with various curvatures, and accurate processing can be performed.

■ In addition, since complete correction is possible, it is possible to effectively prevent the sagging phenomenon during processing, and it is possible to obtain folded products with high precision.

Note that this invention is not limited to the above-mentioned embodiments, and can be implemented in other embodiments.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of a press brake implementing this invention, Fig. 2 is a partially enlarged vertical sectional view of the angle correction device, and Fig. 3
The figure is a partial side view of FIG. 2. FIG. 4 is an enlarged vertical sectional view showing another embodiment, and FIG.
It is a partial side view of the figure. Explanation of main symbols shown in the drawings, 15...
・Upper mold, 7...Lower mold, 17...
・Angle adjustment device.

Claims (1)

[Scope of utility model registration request] A plurality of plates 1 are arranged and attached in the left-right direction at a plurality of locations on a support member 9 that is long in the left-right direction in a press brake.
1, a stopper 23 that is in surface contact with the support member 9 is installed, and a mold adjustment member 13 that supports a mold 15 that is long in the left and right direction is installed so that the vertical position can be freely adjusted. A recess 33b in the front-rear direction opposite to a recess 33a in the front-rear direction formed near both side members of each mold adjusting member 13 is provided near the circumferential side of each mold adjusting member 13, and is fitted into each recess 33a of each stopper 23. Each of the first adjustment members 37 is provided with an inclined surface 35b in the front-rear direction on the surface facing the mold adjustment member 13, and each second adjustment member 41 is disposed in each recess 33b of each mold adjustment member 13. and each of the first adjusting members 37 are provided in surface contact with each other, and each of the first or second adjusting members 37
．． An angle correction device for a press brake, characterized in that one side of 41 is provided for fine adjustment in the front and rear directions.