JPS5938848B2 - Work support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bending machine for folding a workpiece such as a plate, and more particularly to a workpiece support device for supporting a workpiece during bending.

Generally, in a bending machine such as a press brake, it is necessary to support the workpiece being bent, and for this reason, conventionally, the shoulder of the mold groove of the lower die such as a V-die has been used to support the workpiece as it bends. There was a workpiece support device that supported the workpiece while operating in an arc shape. However, in such a conventional workpiece support device, even if the lowering speed of the upper die is constant, the arcuate movement (speed) of the workpiece changes, so it cannot cope with the arcuate movement of the workpiece. However, it was not possible to provide sufficient support.

In particular, it has not been possible to cope with the rapid movement of the workpiece at the start of bending, and the slow movement of the workpiece as the bending progresses, and it has not been possible to support the workpiece appropriately. The present invention has been made in view of these conventional problems, and its purpose is to provide a workpiece support device that can accurately support a workpiece to be bent.

In order to achieve the above objects, the present invention has the configuration as described in the claims.

Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

FIG. 1 shows a schematic block diagram of a workpiece support device embodying the present invention. Workpiece W that is bent by approaching and separating the lower apron as a lower mold support that supports the lower mold 5
A workpiece receiving device T for rotatably supporting the workpiece receiving device T is provided on the front surface of the lower apron, a lifting device 9 for raising and lowering and rotating the workpiece receiving device 7 is provided below the workpiece receiving device 7, and Apron approach speed V
and a detecting device 11 for detecting the approach distance, inputting the signal from the detecting device 11, and determining the width l of the mold groove of the lower mold 5 set from the bending conditions, and the shoulder 13 of the mold groove. Enter the distance L to the lifting device 9 and adjust the lifting speed and rotation angle of the work receiving device □.
An arithmetic processing control device 11 such as a microcomputer that performs arithmetic processing control on
It has been established.

The work receiving device 7 consists of a work receiving member 19 provided with a free conveyor or a foil conveyor or the like on the upper surface to reduce resistance to the work W, and is connected to the tip of a support arm 21 of the lifting device 9, which will be described later. It is set up so that it can move freely.

The lifting device 9 includes the support arm 21, a drive device 23 for vertically moving the support arm 21, and a rotation device for rotating the work receiving member 19 rotatably attached to the support arm 21. (not shown). The arithmetic processing control device 17 calculates the width l of the mold groove of the lower mold 5 and the shoulder 1 of the mold groove set from the bending conditions.
3, an input data setting unit 25 inputs and sets input data such as the distance L to the lifting device 9;
The detection device 11 determines the approach speed V and approach distance (upper mold 3 relative to lower mold 5) of the upper apron or lower apron.
an arithmetic processing section 27 which inputs a signal corresponding to the pushing amount s), performs arithmetic processing as described below, and outputs the arithmetic result in order to control the lifting device 9; and the arithmetic processing section 2
It is comprised of a speed control section 29 which inputs the calculation result from 7 and outputs a control signal for controlling the driving device 23 of the lifting device 9 and the rotating device. Further, the elevating device 9 is provided with a detecting device 31 that detects the elevating speed and rotating speed of the work receiving member 19 and provides feedback to the speed control section 29.

Next, the operation of the embodiment with the above configuration will be explained.

When bending a workpiece using a bending machine, first input the input data to the input data setting section 25, that is, the width l of the mold groove of the lower mold 5, from the shoulder 13 of the mold groove to the lifting device 9. Input and set the distance L.

Also, instead of the distance L, the support arm 21 of the upper die 3 and the device 7
It is also possible to input and set by calculation L(LL-l/2) from the distance LL between them. Next, when the bending machine is operated to bend the workpiece, the approach speed V of the upper apron and the pushing amount s are detected by the detection device 11, and the detection signal is sent to the arithmetic processing section 27. Output. Simultaneously with inputting the detection signal, the arithmetic processing unit 27 inputs the input data from the input data setting unit 25, and calculates the rising speed v of the workpiece receiving member 19 and the rotation angle θ of the workpiece receiving member 19. calculate.
That is, the arithmetic processing unit 27 processes the input data (1
,L) and the above detection signal (,s), the formula -2Dref
The rising speed v is calculated from the formula θ-Tan-1(l/2s)
The rotation angle θ is calculated from and output. The speed control section 29 inputs the calculation result according to the change in s, and outputs a control signal to control the drive device 23 and rotation device of the lifting device 9 according to the calculation result. Then, the drive device 23 raises the workpiece receiving member 19 at a speed v based on the feedback signal from the detection device 31 according to the calculation result, and the rotation device moves the workpiece receiving member 19 up at a speed v based on the feedback signal from the detection device 31 according to the calculation result. The rotation angle of the workpiece receiving member 19 is maintained at θ by the feedback signal, so that the workpiece receiving member 19 supports the workpiece W reliably. That is, the workpiece receiving member 19 is controlled by calculation processing based on the input data (1, L), the lowering speed of the upper apron, and the pushing amount s of the upper die 3 relative to the lower die 5, so that the workpiece W is It can reliably support movement.

Further, even when the lower mold 5 or the water W changes, the input data (1, L) is newly set to the input setting section 25, thereby responding to the change in the lower mold or workpiece. Therefore, the workpiece W can be supported reliably. As can be understood from the above description of the embodiments, the gist of the present invention is to solve the following problems: A workpiece receiving device 7' is provided to support a workpiece to be folded by a folding machine that bends the workpiece by approaching and separating the workpiece, and an elevating device 9 is provided for raising and lowering the workpiece receiving device 7. Alternatively, a detection device 11 is provided to detect the relative approach speed of the lower mold support, and the detection signal V from the detection device 11, the width l of the mold groove of the lower mold 5, and the shoulder 13 of the mold groove The lifting speed V of the work receiving device 7 is calculated from the distance L to the lifting device 9 by -2.
The work supporting device is characterized by being equipped with an arithmetic processing control device 17 that performs arithmetic processing and control of the operation of the lifting device 9 by calculating according to the formula LV/l, so that it corresponds to the movement of the workpiece to be bent. This allows the workpiece to be supported properly.

Although this embodiment has been described with respect to a bending machine in which the upper apron is lowered to fold the workpiece, the present invention can also be implemented in a folding machine in which the lower apron is raised to fold the workpiece.

In addition, in the examples, the mold groove of the lower mold has a substantially V-shape, but it is not limited to this and may have other shapes, such as a U-shape.
It is also possible to use a lower mold having a mold groove in the shape of a letter.

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

Further, the numerals added for convenience in the claims do not limit the technical scope of the invention.

[Brief explanation of the drawing]

FIG. 1 is a schematic plot diagram of a workpiece support device embodying the present invention. (Explanation of symbols representing main parts of the drawing), 3...
... Upper die, 5... Lower die, 7... Work receiving device, 9... Lifting device, 11...
Detection device, 17... Arithmetic processing control device.

Claims (1)

[Claims] 1 Supports a workpiece to be bent by a bending machine that bends the workpiece by the relative approach and separation of an upper mold support body having an upper mold 3 at the bottom and a lower mold support body having a lower mold 5 at the upper part. a lifting device 9 for raising and lowering the workpiece receiving device 7; a detection device 11 for detecting the relative approaching speed of the upper mold support or the lower mold support; From the detection signal V from the detection device 11, the width l of the mold groove of the lower mold 5, and the distance L from the shoulder 13 of the mold groove to the lifting device 9, the lifting speed V of the workpiece receiving device 7 is determined by V. A workpiece support device characterized in that it is provided with an arithmetic processing control device 17 that performs arithmetic processing and control of the operation of the lifting device 9 by calculating according to the formula: =2LV/l.