JPH0475720A - Method and device for bending sheet - Google Patents

Abstract

PURPOSE:To automatically bend the sheet by making the clamping part execute the combined movement of the rotation, the elevation / lowering down, the advance and retreatment, the turn of specific angle. CONSTITUTION:The sheet material A is pressed by a presser means 7b and fixed by advancing a clamping part 7 in the left and right directions and biting a mouth part 7a to the center of the left and right end edges. An NC controller starts the operation. A reciprocating motor 4f is supplied with the pulse of set numbers, a feed screw bar 4b rotates, a reciprocating stand 3 advances, the line to be bent of the sheet material A is positioned upward the die of the press. The dies is elavated and made in contact with the sheet material A. By receiving this signal, the clamping part 7 is released, the dies of the press is elavated, the sheet material A is bent to the upper surface side, the dies is lowered the clamping part 7 operates, every parts move reversely, the front end of the sheet material A is separated a little from a press. The clamping part 7 is elavated, while the reciprocating stand 3 retreats, a claming motor 8c reverses by 180 degree.

Description

[Detailed description of the invention] A. Industrial application field The present invention relates to a method and apparatus for bending a plate.

B. Conventional technology Conventionally, for example, a rectangular steel sheet is bent along both edges toward the top side,
Next, from that position, the board is bent downward at a position inside the board, and when bending it into a hat-shaped steel shape, the board is hung on a hoist and held by several workers while being stretched out in a horizontal plane on a table lifter. Next, the operator held the board and moved it to the press, positioned it, and operated the press to bend it upward. After that, the board was hung again using the hoist, turned over, placed on the table lifter again, introduced into the press, and bent upward again.

C1 Problems to be Solved by the Invention Therefore, when steel sales are heavy, it is extremely dangerous and labor-intensive work.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a method and device which, once set by a human operator, can automatically bend the plate.

01 Means for Solving the Problems In order to solve the above problems, the method of the first configuration of the present invention is as follows:
A carriage is provided that moves forward and backward toward the material inlet of the press, and a table lifter is installed in the center of the carriage, and the left and right sides of a rectangular plate placed on the table lifter with one edge facing the material inlet of the press are provided. A clamp part that clamps the edge is installed on the carriage, the clamp part is held so as to be rotatable about the axis in the left and right direction and can be raised and lowered, and a rectangular plate is placed on the table lifter, and one edge of the plate is placed on the press. The left and right edges are held between the clamp parts while facing the material inlet, and then the plate material is inserted into the press material inlet, the press is operated to bend the material upward, and at the same time, the carriage, The clamp section is driven by power to follow the movement of the clamp section, and then the carriage is moved back to release the plate from the press, and then the clamp section is rotated 180 degrees to turn the plate over and place it on the table lifter. Then, the clamp part is removed, the plate material is rotated 180 degrees in a horizontal plane, the plate material is again introduced into the press in the same manner as above, and the press is operated to bend the plate material upward.

The device of the second configuration includes a plurality of rails that are perpendicular to the material entrance of the press, a carriage that is placed on the rails and has a rectangular shape in plan view and has one edge facing the material entrance of the press, and the carriage. a reciprocating means having a brake motor with an encoder so as to reciprocate, a table lifter placed in the center of the reciprocating table, and a positioning part placed on the reciprocating table on the side opposite to the press with respect to the table lifter; two sets of clamp parts that clamp the left and right side edges of the rectangular plate material placed on the table lifter, and a clamp part rotation means comprising a horizontal co-driving wheel having the clamp parts at the tip and a brake motor with an encoder connected to the clamp parts. , a column equipped with the rotating means at the upper end can be raised and lowered freely, and is connected to an elevating section connected to a brake motor with an engorder that raises and lowers the column! That is.

When the E9 action carriage is in the *fi position, the tape, the lid is in the intermediate position, the clamp part is in the lowered evacuation position 4, a rectangular plate is placed on the table lifter, and the material is placed at the material inlet of the press. It is said to be in a posture with one edge facing the other.

Next, the plate material is moved to the press side and the front end of the plate material hits the stopper. Thereafter, the positioning part is applied to the rear end of the plate material, and the clamp part is advanced to the left and right, and the mouth part thereof is fixed to the center of the left and right edges of the plate material.

Next, when the table lifter rises slightly and leaves the stopper, the reciprocating motor rotates the feed rod, and the carriage moves forward to position the first bending line of the plate above the die of the press. When the table lifter rises slightly and the plate material touches the punch, the die rises and touches the plate material. In response to this signal, the clamp section is released, and when the die of the press rises again, the 11th plate is bent upward. At the same time, the lifting motor rotates to raise the column, the rotating motor rotates, the reciprocating motor rotates, and the carriage moves forward. As it does so, the rear part of the plate moves upward toward the press side while remaining in the opening of the clamp part.

In this state, the die descends, the clamp part operates, each part operates in the opposite direction, and the front end of the plate is located at a distance of about 12 t from the Luz.
At the 9th G, the nitable lifter descends, the clamp part moves upward 2, and the carriage moves backward, while the clamp rotation motor reverses 180 degrees. The front part of the board moves to the rear of the earth (1-), and the back side of [N comes to the J2 side.

When the carriage is in the retracted position, the table lifter is raised to the intermediate position and the clamp part is in the released state. In this state, the clamp part is lowered, the plate is placed on the table lifter, the clamp is retracted, and the operator turns the plate 180 degrees within a horizontal plane on the table lifter.

Then, the operator again puts the front end of the plate against the stopper, the rear end of the plate against the positioning part, brings the next bending line above the die, and operates the press to bend the plate in the opposite direction.

F. EXAMPLE Hereinafter, embodiments of the present invention will be explained based on an example of an armpit shown in the drawings.

In Figure 1.2, the dice D and Bandi P″ of B1/S
The apparatus of the present invention is installed in front of the material inlet of the press configured as C'. Here, the directions are defined as front and back, left and right, and up and down directions toward the press material inlet.

Two mutually parallel l/-rules are laid on the pedestal 1 soil,
A total of four rails 2, one on each side of the pedestal, are stratified orthogonally to the material inlet of the p1nos. A rectangular main body 3a of a carriage 3 in plan view is placed on the l/-ru 2 via wheels 3b, with one edge facing the material inlet of the press.A reciprocating section for reciprocating the carriage 3 back and forth. 4, a feed ball screw rod 4b is screwed into a feed nut 4a fixed to the lower surface of the carriage main body 3a, and is rotatably supported on a pedestal by lying long in the front and back. A drive shaft 4d is connected to one end of the threaded rod 4b via a gear transmission means 4C, and is supported by the pedestal 1 in a long horizontally extending manner. A reciprocating motor 4f consisting of a brake motor with an encoder is connected to the drive shaft 4d via a chain transmission means 4e.i7. and is supported by the pedestal 1.

A table lifter 5 is placed in the center of the carriage 3, and a large number of free rollers 5a made of balls that freely rotate about axes in all directions are provided on the upper surface of the table lifter 5.

With respect to the table lift 9, the carriage 3 on the opposite side of the press
In the positioning part 6, the positioning part 6 is placed on the column 6.
A detection rod 6b is supported at the upper end of the detection rod 6b so as to be movable back and forth in the front and rear directions, and a contact piece 6c is provided at the front end of the detection rod 6b. At (-), a positioning motor 6d consisting of a brake motor with an encoder is connected via a rack/binion mechanism (not shown) h4.

On the carriage 3, two sets of clamps 7 are installed close to the left and right edges on the press side of the table lifter 5, and clamp the left and right edges of the rectangular plate material A placed on the table lifter 5. . The clamp portion 7 includes an opening member 7a having a notch provided in the end face of a cylindrical body, and a holding means 7b that moves forward and backward into the notch. Further, the holding means 7b is an air piston cylinder I! The presser bar is moved forward and backward by the oval, and there is a return spring that returns it.

The rotating part 8 of the clamp part 7 is formed by a horizontal rotating shaft 8a having the clamp part 7 at its tip connected to a rotating motor 8cf$1 consisting of a brake motor with an encoder via a transmission gear 8b.

The lifting section 9 of the clan 1 section 7 rotates! A column 9b equipped with 118 at the upper end is movable up and down within a guide frame a via a guide roller 9c, and a lifting motor consisting of a brake motor with an encoder is operated via a rack 9d and a pinion 9e for raising and lowering the column. 9f is connected.

Also, a lateral movement part 10 that moves the clamp part 7 in the left and right direction.
In this case, a long bed 1] is set up on the upper surface near the front edge of the carriage 3 and parallel to it, and two rails 14 are installed on the upper surface.
2 are placed long horizontally on the left and right. The le/l/1
2, the elevating portion guide tube 9a is mounted 1 via a linear bearing 13 so as to be slidable left and right. A feed nut 14 vertically installed on the lower surface of the guide tube 9a is screwed into a laterally long feed screw rod 15, and a lateral movement motor 16 consisting of a brake motor with an encoder is connected to the end thereof.

The operating state will be explained below.

When the carriage 3 is in the retracted position, the table lifter 5 is in the intermediate position, and the clamp part 7 is in the lowered evacuation position, these positions are taken as the origin of the coordinates. A rectangular plate material A suspended by a hoist is placed on the table lifter 5 with the assistance of one worker, and the worker lifts the plate material A into a position with one edge facing the material inlet of the press P. Hold the edge of the plate and move it to the press P side, and touch the front end of the plate material to the stopper S. After that, the detection rod 6b of the positioning part 6 is advanced to reach the contact piece 6c.
is applied to the rear end of the plate material (as shown in Figure 3a), and this position becomes the origin of the coordinates.Firstly, advance the clamp part 7 to the left and right so that its mouth part 7a is in the center of the left and right edges of the plate material A, and then press the holding means. 7b to press and fix the plate material.

Next, the teaching type NC control device starts operating. That is, when the table lifter 5 rises slightly and leaves the stopper S, a set number of pulses are given to the reciprocating motor 4f, the feed screw rod 4b rotates, the reciprocating carriage 3 moves forward, and the first bending of the plate material A is performed. Position the line AI (shown in the third diagram) above the die D of the press. Next, move the table lifter 5 again.
rises slightly and when plate material A touches the punch, die D
rises and touches plate material A. Upon receiving this signal, the clamp part 7 is released and the die D of the press P rises again.
The plate material A is bent upward (as shown in Figure 3b), and at the same time, the lifting motor 9f rotates according to the set number of pulses.
The column b rises, the rotary motor 8c rotates, and the reciprocating motor 4
f rotates and the carriage 3 moves forward. Along with that, plate material A
The rear part of the clamp part 7 moves upward toward the press side while remaining in the mouth part 7a of the clamp part 7.

Next, the clamp part 7 operates to grasp the plate material A, and at the same time the die descends, the rotation motor 8c and the lifting motor 9 are activated.
f is reversed in response to the set pulse, the plate material A returns to the horizontally extended state, the reciprocating motor 4f is also reversed, and the carriage 3 is moved back to position the second bending line A2 above the die D. Then, the plate material is bent by the same operation as described above (as shown in Figure 3c), and in this state, the front end portion and most of the rear portion of the plate material are bent at approximately 90 degrees.

In this state, the die D descends and the clamp part 7 operates,
Each part operates in the opposite direction, and the front end of the plate material A leaves the press a little.6 Next, the table lifter 5 descends, and the clamp part 7
is raised, and while the carriage 3 is retreating, the clamp rotation motor 8c is reversed by 180 degrees. The front part of the plate material A moves upward and backward, and the back surface of the plate material A comes to the upper side (as shown in Figure 3d). When the carriage 3 comes to the retreat position, the table lifter 5 rises to the intermediate position, and the clamp part 7 is in a free state.

In this state, the clamp part 7 is lowered, the plate material is placed on the table lifter 5, and the clamp is retracted.

Then, the worker lifts the plate material A onto the table lifter 5
degree in a horizontal plane (as shown in Figure 3e).

Then, the operator again applies the front end of the plate material A to the stopper S and the positioning contact piece 6c to the rear end of the plate material, and NC control is started. When the third bending line A3 is brought above the die D and the press is activated, the plate is bent in the opposite direction (as shown in the third frl!J), thus completing the bending work of one end of the plate.

Next, in the same manner as above, the plate material A is turned over, and the other end of the plate material is located on the front side (as shown in Figure 3g), and this front end is placed against the stopper S and positioned at the third bending shoulder of the plate material. When the contact piece 6C is applied and NC control is started, the other end of the plate material is bent in the same manner as described above.

Here, the motor is a brake motor with an encoder, and positioning is ensured by a rotation speed feedback signal from the encoder.

The present invention is not limited to the embodiments and embodiments described above, but includes various modifications without departing from the spirit and scope of the claims.

G. Effects of the Invention With the configuration of the present invention, it has become possible for one worker to perform the work of bending a plate material safely and with almost no effort required.

Since the clamp part performs a combined operation of rotating, raising and lowering, and moving forward and backward, the bending angle of the plate can be accurately and easily followed. Additionally, the 360-degree rotation of the clamp section allows the work of turning the plate over, making it possible to continuously bend the front side and whiten the back side. Moreover, by rotating the plate on the table lifter that can be raised and lowered in a horizontal plane, positioning of any plate is extremely easy.

[Brief explanation of the drawing]

Fig. 1 is a front view of one embodiment of the device of the present invention, Fig. 2 is a right side view, Fig. 3 is a side view of the bent plate and the plate material, Fig. 3a
Figures 3 to 3g are explanatory diagrams of the bending process. A: Plate material, ■): Die, P: Punch, S: Stopper, pedestal 2, talker 3, reciprocating table, 3a: Main body, 3b: Wheel 4 reciprocating part, 4a: - Feed nut I, 4b...don't send i5 stick,
4c... Gear transmission means, 4d... Drive shaft 4 (2) Chain transmission means, 4f... Reciprocating motor 5... Table lifter 5a... Free roller 6, Positioning section 6a... Pillar, 6b Detection rod 6C/Performing Piece, 6d...Positioning motor 7/Cranker part 7a-D member, 7b/Presser 1 stage 8...Rotating part 8a/Rotating shaft, 8b...-Transmission gear 8c/Rotating motor 9...Elevating Part 9a Guide tube, 9b...-Column 9c...Guide roller, 9d Rack 9e Vinyl 4
9f Lifting motor 10/Lateral moving part 11 Bed, 12... I-Rule 13/Linear bearing, 14... Feed nut 15/ Feed spring bar, 16-Sliding motor patent applicant Filed Co., Ltd.

Claims (2)

[Claims] (1) Provide a carriage that moves forward and backward toward the material inlet of the press, and install a table lifter in the center of the carriage,
A clamp part that clamps the left and right edges of a rectangular plate placed on the table lifter with one edge facing the material inlet of the press is installed on the carriage, and the clamp part is rotatable around an axis in the left and right direction, and A rectangular plate is held on the table lifter so that it can be raised and lowered, and with one edge facing the material inlet of the press, the left and right edges are held between the clamp parts, and then the plate is inserted into the press material inlet. Then, the press is operated to bend the material upward, and at the same time, the carriage and the clamp section are driven by power to follow the movement of the clamp section, and then the carriage is moved back to press the plate material. Then, rotate the clamp part 180 degrees, turn the plate over and place it on the table lifter, remove the clamp part, rotate the plate 180 degrees in a horizontal plane, and press the plate again in the same manner as above. A method of bending a plate, which is characterized by introducing the plate into a plate and activating a press to bend the plate toward the upper side. (2) A plurality of rails that are perpendicular to the material entrance of the press in a straight line, a rectangular carriage placed on the rails and having one edge facing the material entrance of the press, and a mechanism for reciprocating the carriage. a reciprocating means having a brake motor with an encoder; a table lifter placed in the center of the reciprocating table;
a positioning part placed on the carriage on the opposite side of the press with respect to the table lifter; and two sets of clamp parts that clamp the left and right side edges of the rectangular plate placed on the table lifter;
a clamp part rotation means comprising a horizontal rotation shaft having the clamp part at its tip, and a brake motor with an encoder connected to the horizontal rotation shaft;
A plate bending device characterized in that a column equipped with the rotating means at the upper end is movable up and down, and an elevating section connected to a brake motor with an encoder for raising and lowering the column.