JP2000351018A - Operation device for press brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure safety of an operator and to easily cope with offset bend, step bend, etc., by arranging a both hand push button operation device and a foot switch for ram drive of a brake for sheet metal work bending in a NC control type moving constitution. SOLUTION: This system is arranged on a base floor face separately from a press brake P/B, consists of a both hand operation device 1, a running axis supporter 2 and a cable protective cover 3 and has a NC control/operation device 4 with display screen to a main body part. The both hand operation device 1 is arranged with ball screws, LM guides, servo motors respectively in the left/right directions of the running axis supporter 2, according to upper/ lower die positions of a machine inputted into the NC control/operation device 4, the both hand operation device 1 is automatically moved in the left/right directions of a machine main body to the die neighborhood position by NC control.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a numerically controlled operating device for a press brake for bending a sheet metal work.

[0002]

2. Description of the Related Art In a press brake for bending a sheet metal work, an operation means for starting a bending process by lowering a punch driving ram as an upper die has conventionally been provided at a position apart from the press brake body. An arranged foot (pedal) switch device or a two-hand operation device is used.

FIG. 8 is a schematic diagram of an entire system including the latter two-hand operation device. This two-hand push button operating device
A relatively heavy stand-type device, separate from the press brake body P / B, is provided with a pair of push-button switches, and the operator cannot place the sheet metal work W on the lower table of the press brake P / B. After the positioning is set by the illustrated back gauge, the pair of push buttons are configured to bend by pressing the pair of push buttons simultaneously with both hands, and unless the hands are simultaneously pressed, the ram does not operate. It is safe.

[0004] In this case, prior to the start of the bending process, the worker hits the workpiece W against the back gauge to perform the positioning, so that the actual processing position and the two-hand push button operating device or the foot pedal switch device are required. It is better to be as close as possible. That is, these operating devices are generally arranged near the center line position of the press brake in the left-right direction.

[0005]

However, all of these operating devices are relatively heavy, and in particular, the two-hand push-button operating device is heavy, so that the position of the mold may be far from the center of the press brake. It was inconvenient and burdensome for the worker to move there, and it was not practical.

For this reason, for example, a plurality of pairs of punches P / dies D are provided on one press brake, for example, at the A, B, and C portions as shown in FIG. There is a problem that the so-called "step bend" to be performed becomes substantially difficult.

[0007] This situation occurs during a so-called "offset bend" as shown in Fig. 3 where a single pair of molds is disposed at either the left or right end of the left and right center lines of the press brake. Is exactly the same.

[0008] The present invention has been made in view of the above-described aspects, and the safety of an operator can be maintained using a conventional foot (pedal) switch or using the two-hand push-button operating device. It is an object of the present invention to provide means that can secure step bend, offset bend, and the like easily as well as to be able to easily secure step bend and offset bend.

[0009]

Therefore, in the present invention, the above object is achieved by providing a press brake operating device described in any of the following items (1) and (2). It is.

(1) An operating device for starting a processing ram in a press brake machine for bending a sheet metal work is positioned near the die according to the upper and lower die positions of the machine input to the numerically controlled operating means. And a mechanism for automatically moving the machine body along the left-right direction of the machine body.

(2) The operating device for a press brake according to (1), wherein the operating device for starting the ram is one of a two-hand operating device and a foot switch device.

[0012]

According to the structure of the present invention as described above, the operation device of the press brake is a numerical control (hereinafter, NC control) type movable mechanism in the left-right direction, so that it can easily cope with offset bend and step bend. In the two-hand operation device, the conventional safety function can be secured as it is.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail based on a plurality of examples with reference to the drawings.

[0014]

(Embodiment 1) FIG. 1 is a front view of an entire system having a two-hand operation device for a press brake according to an embodiment of the present invention.

<Structure> The present system is installed on the foundation floor separately from the press brake body P / B, and comprises a two-hand operating device 1, a traveling axis supporter 2, and a cable protection cover. The main body has an NC control / operation device 4 with a display screen.

The two-hand operating device 1 is provided with a ball screw (not shown), an LM guide, and a servo motor (not shown) in the left and right directions in the traveling axis supporter 2. The two-hand operation device 1 can be moved in the left-right direction of the drawing, and the movement has a protective cover 3 for preventing the cable from being damaged / cut, so that the cable can be accommodated in the cable carrier, and the device 1 can be moved. Therefore, it is disposed below the device 1.

As shown in FIG. 1, the two-hand operation device 1 of this embodiment has a pair of left and right automatic operation start buttons SW for starting the ram, and a foot / two-hand select, movable working and emergency stop between them. Each button SW is provided.

<Operation> Next, a general work processing operation of this embodiment will be described.

1) N of the press brake P / B shown in FIG.
The shift amount from the center line is input by setting the bending position in the input item of the C control / operation device 4 to "center bending" as the reference position O and the right / left directions toward the front +/- x, respectively.

2) When the left and right automatic operation start buttons are pressed at the same time, the center of the two-hand operation device 1 is automatically moved near the bending position input value position together with the back gauge B / G (not shown).

By this operation, the step bend / offset bend as shown in FIG. 2/3 can be easily processed even by using the two-hand operation device 1.

3) An outline of an operation sequence at the time of step bending is described below: a. A bending position (die punch / die P / D position) condition is input.

For example, as shown in FIG.
For C, the respective processing stations A -x ₁ processing station B O (center) working stations C + x ₂ simultaneously inputs the following bending conditions.

Angle 90 ° Material, plate thickness, bending length, etc.

B. Next, the back gauge B / G and the two-hand operation device 1 move to the processing position (for example, the processing station A).

C. The bending operation is performed by simultaneously pressing the left / right operation buttons of the two-hand operation device 1.

D. The back gauge B / G and the two-hand operation device 1 move near the next processing position (for example, the processing station B).

E. The process proceeds to a predetermined next bending process.

<Work Procedure of One Product Example> Next, the above operation will be described in detail for an example of a work shown in FIG. 4;
FIG. 4 shows (a) a three-dimensional view and (b) a developed view of the processed work, FIG. 5 shows a display screen of the NC control / operation device 4 in a processing order of the developed view, and FIG. The example of the same display screen figure at the time of selection is shown.

The two-hand push-button operating device 1 of the present invention, which is a means for starting a bending ram, can be moved safely to a processing area at a predetermined mold position during offset processing or step bending processing, so that it is safe and possible. The burden on the worker can be reduced, and the working efficiency can be improved.

1) The worker receives product information to be processed based on the shape shown in FIG.
On the display screen of the control / operation device 4, the work material A
1, SUS, etc., plate thickness tmm, bending length Lmm, number of sheets, etc. are input.

2) Each bending line → in the development view on the display screen received as the product information is sequentially selected,
The bending order, for example, →→→, is determined.

3) Next, each punch P / die D in each bending process is selected, and a position to be mounted on the press brake P / B is input. FIG. 5 is a display example in the case of the mold A.

First Step Die A (−x ₁ ) Second Step Die A (−x ₁ ) Third Step Die B (+ x ₂ ) Fourth Step Die B (+ x ₂ ) At this point, Since the bending position for each process, that is, the die position is input, the two-hand operating device 1 as the processing ram activation means automatically moves to the predetermined position in each of the above-described processes, and When necessary data is input in the process, the back gauge B / G is also moved to a predetermined position by a known technique, and each bending process can be started.

(Embodiment 2) The two-hand operation device 1 has been described above.
Although the use case has been described in detail, as an application example, in the case where a foot pedal switch having two ram raising / lowering foot switches is used as the starting means, similarly to the above-described embodiment of the present invention, the x direction is used. By diverting the moving mechanism, the same moving effect can be obtained except for the function of the two-hand operation device 1 of the first embodiment as a safety device.

FIGS. 7A and 7B are schematic explanatory views of an example of the foot switch. FIG. 7A is a perspective view of the entire system, and FIG. 7B is an enlarged sectional view of the foot pedal switch. In the figure, 5 is a foot (pedal) switch, 6 is a ram raising / lowering pedal switch, 7 is a protective cover, 8 is a motor for driving the foot switch 5 in the x direction, 9 is a driving screw member,
Reference numeral 10 denotes each guide member.

[0037]

As described above, according to the present invention,
Two-hand push button operation device for ram drive of press brake,
In addition, since the foot switch device has an NC-controlled movable structure, it is possible to ensure the safety of the worker and easily cope with offset bend, step bend, and the like.

[Brief description of the drawings]

FIG. 1 is a front view of an entire system having a two-handed operation device according to a first embodiment.

FIG. 2 Example of step bend

Fig. 3 Example of offset bend

FIG. 4 shows an example of the shape of a processed workpiece, (a) a three-dimensional view, and (b) a development view

[Figure 5] Development view processing order

FIG. 6: Example of mold A selection diagram

FIG. 7 shows an example of a foot switch, (a) a perspective view of the entire system, and (b) an enlarged sectional view of a foot pedal switch.

FIG. 8 is a schematic diagram of a conventional system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Both hands operation device 2 Traveling axis supporter 3 Cable protection cover 4 NC control / operation device 5 Foot switch device 6 Pedal switch 7 Protection cover 8 Motor 9 Screw member 10 Guide P / B Press brake B / G Back gauge P Punch D Die

Claims (2)

[Claims] An operating device for starting a processing ram in a press brake machine for bending a sheet metal work is moved to a position near the die according to the upper and lower die positions of the machine input to a numerically controlled operating means. And a mechanism for automatically moving the machine body along the left-right direction of the machine body. 2. The press brake operating device according to claim 1, wherein the operating device for starting the ram is one of a two-hand operating device and a foot switch device.