JPH09234521A - Three-dimensionally bending equipment and method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the bending accuracy of a work in a three-dimensionally bending equipment. SOLUTION: In this three-dimensionally bending equipment, a die inclining device 10 to incline a die 2 is provided, and the angle of inclination of the die inclining device 10 is controlled so that the direction of the tension to be applied to a work W by a tension control device 6 is matched with the bending direction where the work W is bent along the die 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention controls each servo motor for die tilting, up and down, and tension control based on angle data and position data stored in a memory of an NC controller. The present invention relates to a bending apparatus and a processing method for performing three-dimensional bending.

[0002]

2. Description of the Related Art Conventionally, as a bending apparatus of this type, there is one disclosed in Japanese Patent Laid-Open No. 06-269861. This will be described with reference to FIG.

FIG. 4 is an overall view of a conventional bending apparatus. As shown in the figure, it is integrally fixed on a rotary table 1 for bending a workpiece W as a workpiece. The mold 2, one gripping member 31 integrally fixed to the rotary table 1 where one end of the mold 2 is located, and gripping one end of the workpiece W, and the other gripping member 31 that grips the other end of the workpiece W. A gripping device 3 including a member 32, a table rotation driving device 4 including a table servomotor 41 that rotationally drives the rotary table 1 via a speed reducer 42, and the other gripping member 32 of the gripping device 3. A vertical device 5 having a vertical servomotor 51 for moving the table 52 fixed integrally and moving the other gripping member 32 in the axial direction of the rotary table 1, and a table 62 integrally fixed the vertical device 5. Moved By varying the distance between the rotary table 1 Te, a tension control device 6 provided with a tension control servomotor 61 for controlling the tension acting on the workpiece W, the servo motor 4 for the table
1, a servo motor 51 for vertical movement, and a memory 71 in which position data for controlling the servo motor 61 for tension control is stored in advance, and the position control data is stored in the table rotation drive device 4, the vertical device 5, and the tension control device 6. And an NC control device 7 for outputting

The vertical device 5 can move the other holding member 32 holding the other end of the workpiece W in the Y-axis direction in the drawing via the feed screw 54 and the table 52 by the rotation drive of the vertical servo motor 51. Consisting of a composition. Further, the tension control device 6 includes a servo motor 61 for tension control.
It is configured such that the table 62 to which the vertical device 5 is fixed can be moved in the X-axis direction in the drawing via the feed screw 63 by the rotational driving of the table.

The twisting device 9 is connected to the lower end of the feed screw 54. The twist imparting device 9 is a workpiece W.
The other gripping member 32 gripping the other end is rotated to impart a twist to the workpiece W. The vertical rotation of the twisting servomotor 91 Reducer 92
The shaft 93 fixed to the holding member 32 can be rotated by changing the rotation direction while being connected to the.

In the bending apparatus having the above structure,
When the first and second gripping members 31 and 32 are caused to grip the workpiece W as a work and activated, the NC control device 7 is activated to control the table rotation servo motor 41 and the tension force. The servo motor 61 for operation operates and tensile stress is generated in the workpiece W.

This stress is detected by the load cell 8, the detected actual tension force value and the tension force set value externally set by an operation signal are compared and calculated by the arithmetic unit 82, and the rotation command based on the difference is used for the table. It outputs to the servo motor 41 and the tension control 61 to drive each servo motor. Further, the servo motors 41, 61
The rotational position of is detected by the encoder, and the detected value is N
It feeds back to the C control device 7. In this way, the servo motors are controlled to wind and bend the workpiece W around the mold 2. During this operation, each servo motor 41, 51, 6
The position data of 1 is written in the memory 71 in the NC control device 7.

Based on the position data written in the memory 71 as described above, the table rotation servo motor 41,
Bending is performed by operating the up-down servo motor 51 and the tension control servo motor 61.

[0009]

In the conventional three-dimensional bending apparatus described above, when the workpiece W shown in FIG. 6 is bent along the mold 1, the direction of the tensile stress acting on the workpiece W is shown in the figure. It is in the X-axis direction. This X-axis direction is a direction different from the direction along the mold in which the workpiece W is to be bent (hereinafter referred to as the bending direction), which is indicated by the arrow B in FIG. Therefore, the tensile stress acting in the X-axis direction acts in the direction of separating the workpiece W from the mold. For this reason, conventionally, it is difficult to control the tensile force, and the dimensional accuracy after the bending process varies.

Therefore, the present invention has been made in view of the above circumstances, and an object thereof is to improve the dimensional accuracy of a workpiece after bending.

[0011]

In order to solve the above-mentioned technical problems, the technical means taken in claim 1 of the present invention comprises: one gripping member for gripping one end of a workpiece; Of a die for inclining integrally with the holding member of the die for bending along a workpiece, a tilt axis fixed to the die, and a die tilt servo for inclining the die around the tilt axis. A mold tilting device including a motor, another gripping member that grips the other end of the workpiece, and tension control that applies a tension to the workpiece by controlling the distance between the other gripping member and the mold. For controlling tension of the tension control servomotor, and a memory for preliminarily storing position data for controlling the tension control servomotor. The position control data is output to the tension control device. An NC controller for outputting tilt angle control data to the mold tilting device so that the direction of the tension applied to the work material and the bending direction in which the work material is bent along the mold are substantially the same. Is a three-dimensional bending apparatus having

In order to solve the above technical problems, the technical means taken in claim 2 of the present invention is such that one end of a workpiece is held by one holding member and the other end of the workpiece is held by the other. Gripping the gripping member, controlling the distance between the other gripping member and the mold to apply tension to the work material, and to make the direction substantially the same as the direction of the tension applied to the work material. Bending the workpiece along the mold while inclining the mold integrally fixed to one of the gripping members,
This is a three-dimensional bending method.

The operation of the above technical means is as follows. That is, a mold tilting device for tilting the mold is provided, and the mold tilting device controls the tilt so that the tension direction applied by the tension control device to the work material is the same as the bending direction in which the work material is bent along the mold. To be done. Therefore, during the bending process of the work material, the tension direction and the bending direction are always in the same direction, and the work material can be accurately bent.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The same parts as those of the prior art will be designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is an overall view of a bending apparatus according to an embodiment of the present invention. In the figure, a rotary table 1
The mold tilting device 10 is connected to the upper part of the drawing.
The mold tilting device 10 includes a first pulley 101, and the first pulley 101 is connected to a second pulley 104 connected to a tilting servo motor 103 via a belt 102. The tilt servomotor 103 is electrically connected to the NC control device 7 to perform drive control. The mold 2 is connected and fixed to the upper part of the mold inclining device 10 in the drawing, and one gripping member 31 that grips one end of the workpiece W is arranged at the left end of the mold 2 in the drawing. Therefore, one end of the work material W placed on the upper part of the mold 2 is gripped by the one grip portion 31. The other end of the workpiece W is held by the other holding member 32. The other grip member 32 is connected to the load cell 8, and the signal obtained by the load cell 8 is transferred to the arithmetic unit 82.
Other configurations are the same as those described in the related art, and thus the description will be omitted.

In the bending apparatus having the above construction, first, both ends of the workpiece W are held by the one holding member 31 and the other holding member 32. Next, bending is performed.
At the start of bending, the mold tilting device 10 is driven to move the
The mold 2 is tilted as shown in FIG. From this state, the table rotation servo motor 41 and the tension control servo motor 61 are driven to apply tensile stress to the workpiece W,
Start the bending process. Then, the mold 2 is sequentially tilted counterclockwise in the figure. Then, the mold 2 is tilted to the tilt position shown in FIG. 3, and then the tilt drive is stopped. Bending is performed in this manner.

During the bending process, the table servo motor 41, the vertical servo motor 51, the tension control servo motor 61, and the twisting servo motor 91 are stored in advance in the memory 71 as described in the prior art. The drive is controlled based on the position data thus obtained. Further, the tilt servomotor 103 controls the tilt angle of the die tilting device 10 so that the bending direction of the portion of the workpiece to be bent matches the pulling direction (direction of arrow B in FIG. 3). Therefore, the bending directions A1 and B1 of the bent portion A in FIG. 2 and the bent portion B in FIG. 3 coincide with the tensile direction X of the workpiece W. Therefore, the workpiece W is surely bent along the mold 2, and accurate bending can be realized.

[0018]

The invention of claim 1 has the following effects.

A mold tilting device is provided, which is tilt-controlled so that the tension direction applied by the tension control device to the work material is the same as the bending direction in which the work material is bent along the mold. Therefore, during bending of the work material, the tension direction and the bending direction are always in the same direction, and the bending accuracy of the work material is improved.

The invention of claim 2 has the following effects.

When bending a work piece, the bending work is performed while inclining the die so that the tension applying direction applied to the work piece and the bending direction in which the work piece is bent along the die are the same. The three-dimensional bending method was performed. Therefore, during bending of the work material, the tension direction and the bending direction are always in the same direction, and the bending accuracy of the work material is improved.

[0022]

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 rotary table 2 type 3 gripping device 31 one gripping member 32 the other gripping member 4 table rotation driving device 41 table servo motor 5 vertical device 51 vertical servo motor 52 table 6 tension control device 61 tension control servo motor 62 table 7 NC Control Device 71 Memory 8 Load Cell 82 Positioning Controller 9 Twisting Device 91 Twist Servo Motor 10 Type Tilt Device 101 First Pulley 102 Belt 103 Tilt Servo Motor 104 Second Pulley

[Brief description of drawings]

FIG. 1 is an overall view of a three-dimensional bending apparatus according to this embodiment.

FIG. 2 is an enlarged view of the vicinity of the mold inclining device according to the present embodiment, showing a state at the start of bending.

FIG. 3 is an enlarged view of the vicinity of the mold inclining device in the present embodiment, showing a state at the end of bending.

FIG. 4 is an overall view of a three-dimensional bending apparatus in the related art.

FIG. 5 is an enlarged view of a die of a three-dimensional bending apparatus according to the related art, and is a diagram showing problems in the related art.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Mineo Suzuki 2-1-1, Asahi-machi, Kariya city, Aichi Prefecture, Aisin Seiki Co., Ltd. (72) In-house, Takumi, Yamada 2-chome, Asahi-cho, Kariya city, Aichi prefecture Aisin Seiki Co., Ltd. (72) Inventor Yoichi Harada 2-1-1 Asahi-cho, Kariya City, Aichi Prefecture In-house Aisin Seiki (72) Inventor Toshiyuki Miyagawa 2-chome, Asahi-cho, Kariya City, Aichi Prefecture Aisin Seiki Co., Ltd.

Claims (2)

[Claims] 1. A gripping member for gripping one end of a material to be processed, a die integrally fixed to the gripping member for bending the material along the workpiece, and the die. A die tilting device including a fixed tilt axis and a die tilt servomotor that tilts the die about the tilt axis, another gripping member that grips the other end of the workpiece, and the other of the other A tension control device equipped with a tension control servo motor that controls the distance between the gripping member and the mold to apply tension to the workpiece, and stores in advance the position data for control of the tension control servo motor. And a position control data is output to the tension control device, and the direction of the tension applied to the work material by the tension control device and the bending for bending the work material along the mold. Direction Metropolitan 3-dimensional bending apparatus and a NC control device which outputs a tilt angle control data so as to be substantially the same direction in the mold tilting device. 2. One end of a workpiece is held by one holding member, the other end of the workpiece is held by another holding member, and the distance between the other holding member and the die is controlled. A tension is applied to the work material, and the work material is applied to the mold while inclining the mold integrally fixed to the one gripping member so that the tension is substantially in the same direction as the direction of the tension applied to the work material. A three-dimensional bending method in which bending is performed along the line.