JPH0347629A - Bending machine - Google Patents

Abstract

PURPOSE:To simplify a structure and a control system and to facilitate a driving control by interlocking movement in the direction of the width of a positioning member with setting of the width of a press die member by one driving system. CONSTITUTION:A work W is mounted between positioning members 6a, 6b on a work table to drive a servo motor 10. The rotation of the servo motor 10 is transmitted from a pulley 11 to a pulley 15 through a belt 26 to rotate a shaft 19. Then, a pulley 16 is rotated and the rotation is transmitted to a pulley 17 through a belt 27 to rotate a ball screw 18. Then, the positioning members 6a, 6b move inward to position the work W. On one hand, a pulley 12 is rotated by the rotation of the servo motor 10 and the rotation is transmitted to a pulley 13 through a belt 25 to rotate a ball screw 14. Then, a segment holder 23 moves left. On the other hand, the rotation of the ball screw 14 rotates a ball screw 24 through a pulley 35, a belt 37 and a pulley 36. Then, a movable key 32a moves right to set the width of the die.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a bending machine that bends a plate on a plate table.

[Conventional technology]

BACKGROUND ART Bending machines have conventionally been used to bend plate materials. The processing section of this bending force n1 machine is equipped with an upper mold that can be raised and lowered, a lower mold that faces the upper mold, and a bending mold that performs bending on the plate material. There is. The upper mold is composed of a plurality of mold members divided in the width direction of the plate material, and each mold member is configured to be rotatable. Then, by appropriately selecting the necessary number of members according to the width of the plate material and rotating the selected mold members to a position facing the plate material, the predetermined mold width is set according to the width of the plate material. It has become so.

Further, on the plate table, a claw member that comes into contact with the end face of the plate in the width direction is provided so as to be movable in the width direction of the plate.

By moving this claw member, the widthwise positioning (centering) of the plate relative to the processing section is performed.

When bending a plate, the plate is first centered using a claw member, and then the width of the upper mold is set to a predetermined mold width corresponding to the width of the plate. Then, processing is performed by moving the bending die in the vertical and front-back directions while holding the plate material between the upper die and the lower die.

(Problems to be Solved by the Invention) In the conventional bending machine, the operation of centering the plate and changing the mold width of the upper mold are performed using separate drive systems including dedicated servo motors. However, the mold width of the upper mold and the position setting of the pawl member during centering are both determined according to the width of the plate material.

Therefore, if these drives are performed using separate drive systems and control systems, a problem arises in that the structure and control system become rather complex.

An object of the present invention is to provide a bending machine whose structure and control system can be simplified and whose drive can be easily controlled according to the width dimension of the plate material.

[Means to solve the problem]

The bending machine according to the present invention is provided movably in the width direction of a plate to be bent on a plate table, and includes a positioning member for positioning the plate in the width direction, and a positioning member for positioning the plate in the width direction. It is equipped with a presser die member that can freely change the width of the plate holding part, and one drive system. The drive system is for moving the positioning member and setting the width of the presser mold member in conjunction with each other.

[Effect]

In the bending machine according to the present invention, by rotating the motor of the drive system, the positioning member moves in the width direction of the plate, and the plate is positioned in the width direction on the plate table. On the other hand, the presser die member is driven by this drive motor, and the width of the plate holding portion is set according to the width of the plate.

In this way, one drive system moves the positioning member in the width direction and sets the width of the presser mold member. Therefore, the structure is simplified compared to the case where separate drive systems are used. Further, since the width of the presser mold member is set in conjunction with the movement of the positioning member in the width direction, the control system can be simplified compared to the case where each is driven separately.

〔Example〕

First, the overall configuration of a bending machine according to an embodiment of the present invention will be described with reference to FIGS. 2 and 3. FIG. 2 is a perspective view, and FIG. 3 is a plan view thereof.

In the figure, the bending machine 1 mainly includes a processing section 2 that bends plate materials (hereinafter referred to as workpieces), a table 3 placed in front of the processing section 2, and a center section of the table 3. It is comprised of a workpiece moving mechanism 4 for moving the workpiece W in the front-back direction, and a control device 5 disposed on the side of the processing section 2.

The table 3 includes a fixed table 3a and left and right auxiliary tables 3b. The fixed table 3a is provided with positioning members 6a and 6b movable in the width direction of the workpiece W for positioning the workpiece W placed on the table in the width direction.

The workpiece moving mechanism 4 is movable in the front-back direction on the base 4a. The workpiece moving mechanism 4 is equipped with a pad 7 for holding the workpiece W.
This allows the workpiece W to be moved back and forth or changed direction.

A schematic configuration of the processing section 2 is shown in FIG. 4 and a part of FIG. 1.

FIG. 4 is a longitudinal sectional view, and FIG. 1 is a front view. Fourth
In the figure, the processing section 2 mainly includes an upper mold 21 attached to a ram 9 that can be raised and lowered, a lower mold 22 fixed on a lower frame 8, and a rear part of the upper mold 21 and the lower mold 22. (left side of the figure) and a bending die (not shown).

The upper mold 21 is composed of a plurality of mold blocks divided in the width direction of the workpiece W (perpendicular to the paper surface) (see FIG. 1), and includes block molds 21a arranged at both ends,
It has a plurality of segment molds 21b. The segment mold 21b is held by a segment holder 23 formed integrally with one of the block molds 21a, and can be inserted between both block molds 2La.

A ball screw 14 is inserted into the block mold 21a. The ball screw 14 has reverse threads 14a and 14b with the same pitch on both sides of the axial center (FIG. 1), and the block shapes 21a at both ends form the respective threaded portions 14a.

14b. Therefore, as the ball screw 14 rotates, the block molds 21a can move toward or away from each other on the ball screw 14.

The segment mold 21b is connected to the reversing mechanism 30. This reversing mechanism 30 extracts a predetermined number of segment molds 21b according to the width of the workpiece W, and inserts the extracted segment molds 21b between the block molds 21a at both ends by inverting them by 18 cm. It is. The reversing mechanism 30 includes a reversing shaft 31 disposed in a direction perpendicular to the paper surface of FIG.
It has a movable key 32a and a fixed key 32b for selectively connecting the reversing shaft 31 and the segment mold 21b. The reversing shaft 31 is configured to be capable of forward and reverse rotation by approximately 180 inches, and a segment mold 21b is attached to the outer periphery of the reversing shaft 31 so as to be movable in the axial direction but not rotatable in the circumferential direction.Movable key 32a is movably mounted on the reversing shaft 31. A ball nut 28 is mounted on one end of the movable key 32a.
A ball screw 24 provided in parallel with the ball screw 14 is rotatably screwed into the ball screw 8 . In addition, the fixed key 32
b is unable to move. Incidentally, as shown in FIG. 4, sloped surfaces 21c and 22c are formed at the rear end portions of the upper mold 21 and the lower mold 22, respectively, so that the edge of the workpiece W can be bent at an acute angle. It looks like this.

The drive system 40 that moves the positioning members 6a, 6b and changes the width of the upper mold 21 will be described with reference to FIG. Referring to FIG. 1, first, the moving mechanism 2 of the positioning members 6a and 6b is
0 will be explained. A moving mechanism 20 for the positioning members 6a and 6b is provided below the table 3a. This moving machine t120 has a ball screw 18 arranged in the width direction of the table 3. The ball screw 18 has reverse threads 18a and 18b having the same pitch on both sides of the axial center. Further, the pinches of these threaded portions 18a and 18b are formed at the same pitch as the ball screws 14 of the 21 examples of the upper mold. A pole nut is attached to each threaded portion 18a, 18b, and positioning members 6a, 6b are attached to each pole nut.

Next, the drive system 40 will be explained. The drive system 40 includes
A servo motor 10 is provided as a drive source. At both ends of the rotating shaft of the servo motor 10, there are Boo IJII, 12.
is installed. On the other hand, at one end of the ball screw 14,
A pulley 13 is attached. And pulley 12,1
A timing belt 25 is wound between the belts 3 and 3.

Further, a pulley 35 is attached to the ball screw 14. On the other hand, a pulley 36 is attached to one end of the ball screw 24. A timing belt 37 is wound between the pulley 36 and the pulley 35. Therefore, as the ball screw 14 rotates, the segment holder 23 moves on the axis, and the movable key 32a moves by the same amount in the opposite direction to the moving direction of the segment holder 23.

Further, a rotatable shaft 19 is arranged parallel to the rotation shaft of the servo motor IO. Pulleys 15 are provided at both ends of the shaft 19.
, 16 are attached. A timing belt 26 is wound between the pulley 15 and the pulley 11. On the other hand, a pulley 17 is attached to one end of a ball screw 18 disposed below the table 3a. A timing belt 27 is wound between the pulleys 17 and 16.

Next, the operation will be explained.

First, the positioning member 6a on the work table 3.

Work W during 6b! ! and drive the servo motor 10. The rotation of the servo motor 10 is transmitted from the pulley 11 to the boot I715 via the timing belt 26,
The shaft 19 rotates. The rotation of the shaft 19 causes the pulley 16 to rotate, and the rotation of the pulley 16 is transmitted to the pulley valve via the timing belt 27, causing the ball screw 18 to rotate. Then, the pole nut screwed into the ball screw 18,
That is, the positioning members 6a, 6b move inward, and each positioning member 6a, 6b abuts both end surfaces of the workpiece W in the width direction, thereby centering the workpiece W.

On the other hand, the rotation of the servo motor 10 causes the pulley 12 to rotate. The rotation of this pulley 12 is controlled by the timing belt 25.
is transmitted to the pulley 13 via the ball screw 14, and the ball screw 14 rotates by a predetermined amount. Then, the block mold 21a moves inward, that is, the segment holder 23 moves to the left in FIG. On the other hand, the rotation of the ball screw 14 is controlled by the pulley 35. The signal is transmitted to the ball screw 24 via the timing belt 37 and the pulley 36, and the ball screw 24 rotates. Then, the movable key 32a, one end of which is screwed into the ball screw 24, moves on the shaft to the first position.
Move to the right in the diagram.

When the centering operation of the work W is completed, the rotation of the servo motor 10 is also stopped.

By stopping this servo motor 10, the block mold 21a
The movable key 32a also stops moving, and the segment type 21
The selection operation b, that is, the mold width setting operation is also completed.

Next, the reversing mechanism 30 selects the selected segment type 2.
1b is inverted and inserted between the block molds 21a.

In this embodiment, since the centering operation of the workpiece W and the width setting of the mold are performed by one drive system, the structure can be simplified. Further, since the width of the mold is set in conjunction with the centering operation of the workpiece W, the control system can be simplified.

[Other Examples]

(a) In the above embodiment, the servo motor 10, the work centering device, and the mold width changing device were each connected by a timing belt, but either one of the devices could be directly connected to the servo motor and driven. You can do it like this. In this way, the drive system can be further simplified.

■) Servo motor 10 and each ball screw 14, 18°24
The connection is not limited to a timing belt, but may also be a belt or the like. Alternatively, a gear mechanism combining a plurality of gears may be used.

(C) In the above embodiment, if the pitches of the ball screws 14 and 18 are kept the same, the widths of the positioning members 6a and 6b and the width of the selected segment mold 21b can be increased or decreased by the same amount, but there is no problem. The positioning members 6a, 6b are made slightly movable relative to the ball nut screwed together, and the positioning members 6a, 6b are provided between them.
If a gap eliminating member such as a spring that urges the 6b inward is provided, a difference in width between the two will occur, and when the workpiece is sandwiched from the left and right by the positioning members 6a and 6b, the positioning members 6a and 6b will This eliminates the problem of not being able to properly position the workpiece due to a gap between the workpiece and the workpiece.

〔Effect of the invention〕

In the bending machine according to the present invention, the positioning of the plate material in the width direction and the width setting of the mold are performed in conjunction with the same drive system, so the structure and control system can be simplified, and drive control can be facilitated. can be done.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a drive system of a bending machine according to an embodiment of the present invention, FIG. 2 is an overall perspective view of the bending machine,
FIG. 3 is a plan view thereof, and FIG. 4 is a schematic cross-sectional view of the processing section. 6a, 6b...Positioning member, 21...Upper mold, 2
1a...Block type, 21b...Segment type, 1
0... Servo motor, 11, 12, 13, 15, 16
゜17.35.36...Pulley, 25.26, 27゜37...Timing belt.

Claims (1)

[Claims] (1) A positioning member that is movable in the width direction of the plate to be bent on the plate table to position the plate in the width direction, and a plate holding part whose width is changed according to the width of the plate. A bending machine comprising: a flexible presser die member; and one drive system for interlocking movement of the positioning member and setting of the width of the presser die member.