JPH02142621A - Continuous box-bending device - Google Patents

Abstract

PURPOSE:To manufacture a flanged box body with one machine by providing a hemming part on one side of the die setting position of a press brake and a box-bending part on the other side. CONSTITUTION:The hemming part is provided on one side of positions for setting dies 16, 17 on the press brake to carry out reciprocal bending of a hem of a sheetlike work. The box-bending part 50 is provided on the other side to carry out box-bending of the sheetlike work after hemming is completed. An upper side device for hemming is provided on one side of the lower end of the ram of the press brake, a lower die assembly body is provided on one side of the upper surface of a bed, the sheetlike work is hemmed by both devices and the lower die device for box-bending is provided on the other side of the upper surface of the bed to carry out the box-bending of the work. By this method, the flanged box body can be manufactured.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a continuous box bending device that forms a box by bending the edges of a sheet-like workpiece and then raising each side plate, and This invention relates to a press brake that performs edge bending in forward and reverse directions, or box bends a workpiece after edge bending.

[Prior Art] Conventionally, in order to form a box by bending a metal plate (sheet-like work, hereinafter simply referred to as work) that has been cut into a predetermined shape,
This is done using two or more press brakes or other bending machines dedicated to the process of bending the edges of the workpiece and raising the side plates.

[Problem to be solved by the invention] Normally, making a box is accomplished by box-bending the side plates connected from the long and short sides of the bottom plate.
A corner member must be fixed to the abutting portion of each side plate, or the abutting portion must be welded.

In order to avoid this, it is possible to connect a flap to both ends of one side plate (for example, the side plate on the long side) and bend it so that it fits closely to the side plate on the short side when bending the box. It was difficult to perform edge bending and box bending with flaps. Further, when making a box body with flanges formed on the upper sides of the side plates, each side plate of the workpiece, which has been flanged in advance, must be stood up, resulting in problems such as complicated mold operations.

The present invention combines sheet-like workpieces with 7 lunges and flaps into one
The purpose is to provide a device that can continuously bend boxes with a press brake.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a continuous box bending device by attaching molds for the first and second steps to the left and right sides of a press brake. That is, an edge bending section for performing forward and reverse bending of the edge of the sheet-like workpiece is provided on one side of the mold attachment position of the press brake, and a box-bending section for box-bending the sheet-like workpiece after edge bending is provided on the other side. It is characterized by:

More specifically, an upper die assembly for edge bending is provided on one of the lower ends of the ram of the press brake, an upper die assembly for box bending is provided on the other side, and the upper die assembly for edge bending is provided on one of the upper surfaces of the bed.
A lower mold assembly is provided which works together to bulge the long and short edges of the sheet-like workpiece downward and to bulge both edges of the long side upwardly, and the box bending upper mold assembly is provided on the other side of the bed top surface. The sheet-like workpiece after edge bending is box-bent in conjunction with the edge-bending process, and the upper side has a flange. It is characterized by being equipped with a molding device.

Further, the present invention also covers a press brake equipped with the above-mentioned upper die assembly and a lower die assembly, and a press brake equipped only with a lower die device like the above-mentioned upper die device for box bending.

[Example of travel] Next, the present invention will be specifically explained based on the drawings.

FIG. 1 is a front view schematically showing the continuous box bending apparatus of the present invention. The machine body 10 includes a frame 11, a bed 12, and a ram 1.
3 and a main cylinder 14 for raising and lowering the ram, when viewed from the front, an edge bending section 15 consisting of an upper mold assembly 16 and a lower mold assembly 17 for forward and reverse bending is attached to the left side, and the right side A box bending section 50 comprising an upper die device 51 and a lower die device 52 for flat bending is attached to the box bending section 50. The front surface of the machine body 10 has a front device for carrying in, positioning, moving forward and backward, turning in a horizontal plane, tracking during bending, and taking out and carrying out products, but this is not shown.

This invention is for manufacturing a box with width W, length L, and height H and seven lunges formed around the upper part.Before explaining each part of the device, we will explain the shape of the worksheet to be handled and the outline of the folding process. Let's talk about.

FIG. 2 is a plan view of the sheet-like workpiece (blank sheet) 1, in which side plates IB and 1B are connected to the top and bottom of the bottom plate 1^, and side plates 1C and 11C are connected to the end side, and flanges 2a are connected to the outside of the side plates 1B and 1B. , 2c, side plate IB, flaps 3a, 3b, 3c, 3d, side plate 1c on both sides of IB,
Flanges 2b and 2d are connected to the outside of lc, respectively. In the figure, 2e is the protruding part of both wings of flanges 2b and 2d, 4.5.6 is the bending line during edge bending, and 7 and 8 are the short side bending line and long side bending line in the box bending process. be.

In the box bending process, the side plate IC11 on the short side (or left side)
c is bent forward by a predetermined angle, and the side plates IB and 8 with flaps are bent from the outside thereof, so that the short side bending line 7 and the flap side bending line 6 are the same as the thickness of the sheet-like workpiece. Only the valve has a gap Q.

FIG. 3 shows a state in which flanges 2a to 2d are successively formed by downward bending of the edge bending portion 15 in the first step, and then flaps 38 to 3d are formed by upward bending. Fourth
The figure shows the initial stage of box bending, which is the second process. Second
In the process, the bottom plate 1^ is placed on the lower mold, clamped with the upper mold, and then processed, the side plates IC and IC on the gable side begin to be bent along the bending line 7.7 on the short side side. Side side plate I
After C and IC are bent to an angle θ (for example, 45°) as shown in FIG. 4, by further applying pressure, the side plate 1B,
IB is bent along the long side bend line 8.8. As a result, as shown in FIG.
A box body 9 is molded in close contact with the outer edge portion of the IC.

The continuous box bending device of the present invention has the edge bending portion 15 as described above.
and a box bending portion 50. FIG. 6 is an enlarged plan view taken in the direction of the arrow from the line Vl-Vl in FIG.
It shows that the lower die device 52 of the box bending section is disposed on the right side. In the figure, 20 is a back gauge, 21 and 22 are a pair of left and right lower mold holders 24 that are movable in opposite directions on the lower mold base 23, are cylinders for moving the lower molds, and 26 is a piston rod of the cylinder 24. The tip thereof is fixed to the end surface of the lower mold holder 21 (see FIGS. 7 and 8). 26 is a shift mechanism that moves the lower mold assembly 17 a predetermined distance in the front and back direction. Further, reference numerals 53.53 and 54.53 denote frames before and after the lower die device 52 in the box bending section, respectively, and 54.54 denote a pair of short sides movable in opposite directions in the longitudinal direction of the frame 53.53.] Ki lower type, 55.55 is frame 5
3. A pair of long-side lower molds movable in opposite directions in the front-rear direction in 53, 56 is a moving mechanism for the short-side lower molds, and 57 is a moving mechanism for the long-side lower molds. 1Fl11a side.

Details of the lower die device 52 will be described later with reference to FIGS. 14 to 16.

Next, each part will be explained.

Edge Bending Edge bends are formed by combining special molds into the construction of the press brake. That is, as shown in FIG.
A fixed upper mold 27 for upper bending and a movable upper mold 30 for lower bending are attached to the lower end of 3, and a shaft 46 is provided on the front upper surface of the lower mold holder 21 to rotate the lower mold 45. It can be placed freely, and a backup 47 is provided at the rear to support the reaction force during downward bending.

The fixed upper mold 27 is fixed to the lower end of the ram 13 using bolts, but the movable upper mold 30 is supported by a shaft 28 provided on a bracket on the back of the ram, and is moved rearward from the bottom of the upper mold 27 by the operation of a cylinder 38. It is installed so that it can be reversed to the retracted position. This movable upper mold 30 has a clamp part 4432 at the front part of the main body 31, a rotating piece 33 at the center of the circular part, a balloon-shaped member 34 and a backup 48 arranged on the right side of the rotating piece 33 at an angle allowing for an overbend angle. It has a matching protruding piece 35. The lower side of the clamp member 32 is in contact with the left protrusion of the rotary top 33, and the lower side of the balloon-shaped member 34 is in contact with the right side protrusion of the rotary top 33. The balloon-shaped member 34 is always tended to be pulled up by a spring (not shown). In addition, in FIG. 7, 37 is a bracket, 38 is a cylinder suspended from the bracket 37, and 3
9 is a piston rod of the cylinder 38; 41 is an arm supported by the shaft 28; one end is pin-jointed to the tip of the piston rod 39; and the other end is fixed to the movable upper mold 30. Further, 48 is a notch provided in a part of the backup 47. This notch 48 can be used to insert the flanges 2b and 2d of the side roots 1c and 1c into the circular part of the machine body when forming the flaps 3a to 3d of the workpiece as shown in FIG. This is a relief to prevent the protruding portions 2e (see FIG. 2) of both wings of the flange from interfering with the backup 47.

(Flange Forming) FIG. 7 shows a state where the movable mold 30 for reverse bending is slightly separated from the workpiece immediately after edge bending in flange forming of the workpiece 1. To form a flange, for example, one side plate 1B in FIG. 2 is advanced to the processing position of the lower die 45, the ram 13 is lowered to process the flange 2a, and then the workpiece is moved back and turned 90 degrees. The flange 26 on one end side is machined by advancing and lowering the ram, and the flanges 2C and 2d on the other side plate and the side plate on the end side are machined by repeating the backward rotation of the workpiece, advancing, and lowering the ram. When processing flanges on each side, the clamp die 33 and the lower die 45 are moved by lowering the ram 13.
The upper surface of the ram presses the vicinity of the edge of the workpiece, and the rotary piece 33 rotates due to the subsequent pressurization of the ram and transmits the pressurizing force to the punch die 34. This causes the Koki mold 34 to move downward from the movable mold main body 31.
moves and bends the flange.

The bending reaction force is supported by the protruding piece 35 engaging with the backup 47. The edge of the lower die 45 and the punch die 34 are inclined with respect to the vertical plane and overbended to take into account springback.

Since the lower die 45 and the Koki die 34 are of an overbend type, if the lower die 45 is immovably fixed to the lower die holder 21, automatic die cutting will be hindered, but in the present invention, the above-mentioned A shaft 46 is provided at one end of the lower mold 45 to facilitate mold removal when the ram rises after downward bending. In other words, at the lower bending end, the Koki die 34 is located on the slope of the tip of the lower die, so the vertical upper bound force of the tip of the Koki die due to the TR of the ram causes the lower die to be closely attached to the edge of the workpiece through the edge bending part. The lower die 45 is slightly rotated counterclockwise about the shaft 46 due to this pulling up.
The workpiece is handled as a mold as soon as the tip of the mold is removed. After the mold is removed, the lower mold 45 automatically rotates clockwise to return to its original position, while the Koki mold 34 is pulled up to its original position as shown in FIG. 7 by a spring (not shown) as described above. .

(Flap molding) After the flanges 28 to 2d of each side plate are molded as described above, the cylinder 38 is operated at the raised position of the ram 13, the arm 41 is rotated clockwise, and the movable mold 30 is moved behind the ram. Invert it to the retracted position (Fig. 8). Next, the cylinder 24 shown in FIG. 6 is operated to move the left and right lower molds outward from each other to create a lower mold missing space 29 corresponding to the width W of the side plate on the workpiece end side in the longitudinal center portion of the lower mold base 23. (Figure 9). After doing this, with the workpiece tilted forward, insert one side plate 1C on the gable side into the lower mold missing space 29, and remove the side plate IB.

The edge portions of 1B are placed on lower molds 45 and 45 that are opened left and right, the ram 13 is lowered, and the flaps 3a and 3b are processed by applying pressure with the upper mold 21. After opening the mold, pull back the workpiece, turn it 180 degrees, insert the other end side plate into the space 29 in a forward leaning position again, press the edge of the other side plate to form the flaps 3c and 3d, and open the mold. By pulling it back, an intermediate product with edge bending as shown in FIG. 3 is obtained.

Box bending section The box bending section 50 is made by bending each side plate of the intermediate product obtained in the edge bending section 15 to form a flute body (fifth flange) with an upper side flange.
1), and as shown in the front view of FIG.
It is located to the right of 0.

That is, the box bending upper die device 51 is attached to the lower end of the ram at a position away from the upper die assembly 16 at the edge bending part, and the box bending lower die device 51 is attached to the upper part of the bed 12 at a position away from the lower die assembly 17. A device 52 is attached.

Next, the upper mold device 51 and the lower mold device 52 will be explained in detail separately.

(Upper mold device) The upper mold device 51 is formed by removably mounting an upper mold 61 of a size corresponding to the inner dimensions of the bottom plate of the product 9 on a mounting plate 60 at the lower end of the ram. More specifically, this upper wall covering [51, as shown in FIGS. A support member 63 replaceably provided in the center and an upper mold 61 fixed to the lower end of the support member 63
, a mold support plate 65 mounted movably on the left and right lower surfaces of the mounting plate 60 with the support member 63 in the center, and a mold support plate 65
a locking means 67, a work knockout member 75 provided at the center of the front part of the mounting plate 60, a rotating means 70 for rotating the mounting plate 60 90 degrees forward from the lower end of the ram,
upper mold locking means 68 for temporarily fixing the rotational position;
The mold support plate stocker 80 provided at the rear of the ram 13 is the main part.

The mounting plate 60 is attached to @62 horizontally suspended near the lower end of the ram, and is normally fixed to the lower end surface of the ram by the extension of a rotating means (cylinder, piston rod) 70 (
Figure 10). When the screws and rods of the rotating means 70 are retracted, the mounting plate 60 is moved 90r in front of the ram with the shaft 62 as the center, as shown by the chain lines in FIGS. 11 and 12. Rotate once to make the support member 63 and the work knockout member 10 horizontal. A T-groove 64 is formed on the lower surface of the mounting plate 60, and using this T-groove 64, mold support plates 65 disposed on the left and right sides of the central support member can be freely removed or moved in the front-rear direction (left-right direction in FIG. 12). It is slidably attached and is provided with a locking means 67 at the lower front part of the mounting plate. Also the 10th
As shown in the figure, a locking means 68 for the support member 63 is provided on the side of the mounting plate 60.

As shown in FIG. 12, the rotating means 70 includes a bracket 71 provided at the front of the ram 13, a cylinder 72 suspended from the bracket 71, a piston rod 73, and one end connected to a shaft 62.
The piston rod 73 is supported by an arm 74 and has its other end pin-coupled to the tip of a piston rod 73. Since the arm 74 is fixed to the front end of the mounting plate 60, the operation of the cylinder 72 causes the mounting plate 60 to rotate from horizontal to vertical. The knockout member 75 is attached to the mounting plate 6 as shown in FIG.
It is attached to a plate 79 extending in front of 0. This member 75 has a knockout plate 76 fixed to the tip of a knockout par 76 which is attached so as to be convertible according to the size of the workpiece, and includes a lock plunger 78 provided on the upper part of the plate 79. During box bending, the flange portion comes into contact with the knockout plate 76, and is rotated together with the upper die 61 as shown by the chain line in FIG. 11 by the operation of the rotating means 70, in preparation for taking out the workpiece.

A stocker 80 is provided behind the mounting plate 60. This stocker 80 consists of a plate 82 fixed to a beam 81, a rod 83 supported by the plate 82, and a horizontal plate 84 provided at the lower end of the rod 83. On the bottom of the horizontal plate,
A T-slot 85 is provided at the same position as the T-slot 64 of the mounting plate 60 so that the upper side of the mold support plate 65 is engaged (the first
Figure 2). In addition, each mold support plate 65 has a long hole 66 for a drawer.
have.

When box bending is performed using the upper mold 61 having the size shown by the solid line in FIG. 10, the left and right mold support plates 65 are all stored in the stocker 80 as shown in FIG. 11.

Also, when replacing the upper mold with a larger one than the one shown,
The left and right mold support plates 65 are pulled out from the stocker 80 to support the upper mold. Also in the same figure! As shown in line 1, when using the largest upper mold, all the mold supporting plates 65 are pulled out and set on the lower surface of the mounting plate 60.

(Lower mold device) The lower mold device 52 can change the mold size in correspondence with the upper mold 61. In other words, the Koki mold 54.54 on the short side is a replaceable type that makes a sound depending on the length of the short side of the workpiece, but the Koki mold 55.55 on the long side is a non-replaceable type in which one piece is placed facing each other. It is.

As schematically shown in FIG. 6, the lower mold device 52 is provided with a pair of short-side lower molds 54.54 movable in opposite directions on the circular portions of the front and rear frames 53.53, and A pair of front and rear long side lower molds 55.55 is provided in contact with the end surface of the short side lower mold 54.54.

Behind the front plate supporting the bed 12, as shown in FIG.
and 110 are set up. Transmission members 103, 104, 103, 104, etc. from the motor 100 to sprockets, chains, etc.
05 and the shaft 106, the left and right screw rods 1 are arranged in the longitudinal direction of the center of the circular part of the frame 53.
Connect to 07, 107. The screw rod 107 is a female thread cylinder 109 provided at the bottom of the slide block 108.
are screwed together. Therefore, drive motor 100! +1
Then, the left and right screw rods 1 are connected via the transmission member.
07 and 107 in opposite directions to move the slide blocks 108 and 108 the same distance, and the short-side side butterbur lower molds 53 and 53 attached to the slide blocks are moved.
The spacing can be adjusted (see Figures 6, 10, 14, and 15). The sprocket of the other motor 110 is connected to a total of six screw rods 120, three of which are inserted through the frame 53 and 53 at opposing positions, via a chain and substructures 111 to 16. Since the tip of the screw rod 120 is connected to the long side bottom mold 55, 55, the long side bottom mold 5 is driven by the motor 110.
5.55 intervals can be adjusted.

As shown in FIG.
) protrudes upward. Upper mold 6 with workpiece in between
1 descends, the side plate 1C on the short side (gable side) comes into contact with the short side side plate 54, and is bent by a predetermined angle θ due to pressure as explained with reference to FIG. This is to perform the bending of the side plates IB and IB on the side. A receiving mold 125 pushed up by a cushion cylinder 124 is disposed in a circular portion surrounded by the bottom molds 54, 54, 55, and 55. This cushion cylinder 124
is fixed to the lower mold holder 126 (FIG. 15).

Further, at both ends of the lower mold holder 126, positioning pins 130 are protruded from the tips of arms 129 supported by pins 127 and springs 128 (FIG. 14). Further, the lower mold holder 126 is placed on the upper surface of the slide block 10B, which is moved by the screw 107, so that it can be moved slightly. That is, the lever 132 is attached to the slide bar [Jtsuk 108, and the lever 13
One end of the lever 2 is connected to the piston rod 134 of the cylinder 133 for releasing the lower mold on the short side, and the other end 135 of the lever is brought into contact with the rear wall 136 of the lower mold holder 126.

When bending a box, the lever 132 is activated by actuating the cylinder 133 after the long side is bent at a predetermined angle θ at a predetermined angle θ and then the long side is bent to around 45 degrees. Rotate and short side side butterfly mold 5
Move 4 forward slightly and overbend. This overbend serves to prevent the short side from escaping by the thickness of the plate so that the long side side plate is correctly bent from the outside of the short side side plate.

Operation The workpiece 1 cut into the shape shown in FIG. 2 is transported to the front of the machine body 10, and after being centered by a front device (not shown), one side plate 1B is advanced to the processing position of the lower die 45. , the ram 13 is lowered to form the flange 2a, and then the workpiece is moved back and turned 90 degrees. By this turning, the edge on one end side is directed in the edge bending direction, the workpiece is advanced, and the flange 2b is formed by lowering the ram. Thereafter, the work is retreated, and the ram is rotated and moved forward to form flanges 2C and 2d. Next, Figures 8 and 9
As shown in the figure, there is a missing space 2 in the center of the lower mold 45.
After 9 is formed, the side plate 1C is placed first, the workpiece is tilted, and the end portions of the steel plates ia and te are placed on the left and right lower molds 45° 45, and the ram lowers to create the flaps 3a and 3a.
Mold 3b. Next, the mold is opened, the work is moved back, the workpiece is rotated 180 degrees, the other W-side side plate is inserted into the space 29 in a forward-leaning position, and pressure is applied to form the flaps 3c and 3d, and the edges are bent as shown in Fig. 3. Take 1q of the finished intermediate product.

Next, the machine main body 10 is moved to the right on the front side and moved forward to advance the bottom plate 1A of the workpiece to the position of the lower die device 52 of the box bending die 50. The workpiece is positioned by inserting the bins 130 protruding from both ends of the short-side butterfly lower molds 54 and 54 into the L-shape outside the bottom plate of the workpiece 1.

After the positioning is completed, the main cylinder 14.14 is driven to lower the ram 13. As the ram descends, the short side is bent first by the upper die 61 and the short side side butterfly lower die 54. When the short side is bent at an angle of about 45 degrees, the long side is bent by the cloth under mold 55 on the long side. As mentioned above, after the long side is bent by about 45 degrees, the relief cylinder 133 (Fig. 15) is activated to overbend the short side so that it does not interfere with the long side that will rise later. do. In this way, the molding of a box 9 with a flange at the top of each side, a width W1 long, and a height T1 is completed. After the box bending is completed, the cylinder 72 is activated to rotate the temporary attachment 60 to project the product horizontally in front of the ram 13 together with the upper mold, and then the knockout member 75 is activated to remove the product from the upper mold 61. It is something to take out.

When the workpiece size is different, replace the mold or adjust the mold length. In the edge bending section 15, the length of the lower mold missing space 29 can be changed simply by operating the cylinder 24 shown in FIG. 6 to move the left and right lower mold holders 21 a predetermined distance. The box bending section 50 performs special modification work on the upper die device 51 and the lower die device 52. Upper mold device 5
In step 1, the supporting member 63 and the upper mold 61 are replaced with ones of predetermined dimensions, and depending on the size of the mold, the mold supporting plate 65 is stored in the stocker 80 or pulled out and arranged on the lower surface of the mounting plate 60. (Figure 11). The lower mold device 52 has a long side (width W)
When this is changed, the motor 110 is driven to move the long-side butterfly lower mold 55° 55 and remove the original short-side butterfly lower mold. Next, a new shorter-side butterbur lower mold 55.55 having a predetermined size is set between the opened long-side butterfly lower molds, and the mold exchange is completed.

[Effects of the Invention] As described above, in the present invention, a press brake is provided with an edge bending portion on one side and a box bending portion on the other side, so that a box body with seven flange can be easily manufactured using a machine with a single machine. be able to. In addition, for the edge bending part, the lower mold is split and opened to the left and right to form a space where the lower mold is missing, so the short side can be inserted into the machine body to ensure flap forming on the long side. Moreover, since the upper die is equipped with a movable die, it is possible to perform downward bending successively after downward bending. Furthermore, the box bending section is designed so that the mold length can be changed and replaced according to the dimensions of the workpiece, so that a box of a desired size and shape can be formed with high efficiency.

[Brief explanation of the drawing]

Fig. 1 is a front view of the continuous box bending device of the present invention, Fig. 2 is a plan view of a blank sheet (sheet-like work), Fig. 3 is a perspective view of the work after edge bending, and Fig. 4 is a box bending process. Fig. 5 is a perspective view of the product after box bending, Fig. 6 is an enlarged plan view of the lower mold part, and Fig. 7 is a perspective view of the workpiece in the initial stage.
A cross-sectional view of a bending die for forming a flange by bending the side edges downward, Fig. 8 is a cross-sectional view of a bending die for forming flaps on both edges of the side plate, and Fig. 9 is a schematic diagram of the processing state shown in Fig. 8. FIGS. 10 to 16 are diagrams showing the box bending section, FIG. 10 is an enlarged sectional view of the box bending section, FIG. 11 is an enlarged side view, and FIG. 12 is a top view of the box bending section. Enlarged side view of mold, 1st
Fig. 3 is a perspective view schematically showing the principle of box bending, Fig. 14 is an enlarged plan view of the box-bending butterbur lower mold, Fig. 15 is an enlarged longitudinal sectional view of the main part of the box-bending butterfly lower mold, and Fig. 16 The figure is also an enlarged cross-sectional view. 9... Box body, 10... Machine body, 25... Edge bending part, 16... Upper die assembly, 17... Lower die assembly, 2
7... Upper mold, 28... Axis, 29... Space, 30.
... Movable upper mold, 32... Clamp mold, 33... Rotating top, 34... Balloon mold, 45... Lower mold, 46...
Axis, 47... Backup, 48... Notch, 50
...Box bending part, 51... Upper die device, 52... Lower die device, 53... Frame body, 54... Short side side balloon lower die, 5
5...Long side side butterfly bottom mold, 60...Mounting plate, 61...
・Upper mold, 63... Support member, 65... Mold support plate, 1
0... Rotating means, 75... Knockout member, 76
...Knockout par 80...Stocker, ioo
, 1io...Motor, 108...Slide block, 124...Cushion cylinder, 125...Reception mold. T'p document of Hitachi, Ltd. drawings (no changes to the contents) Drawing procedure amendment (voluntary) January 7, 1986

Claims (1)

[Scope of Claims] 1. An edge bending part for performing forward and reverse bending of the edge of a sheet-like workpiece is provided at one of the mold mounting positions of the press brake, and a box for box-bending the sheet-like workpiece after edge bending is completed on the other side. A continuous box bending device characterized by having a bending section. 2. An upper die assembly for edge bending is provided on one side of the lower end of the ram of the press brake, and an upper die assembly for box bending is provided on the other side, and a sheet-like workpiece is mounted on one side of the bed upper surface in cooperation with the upper die assembly for edge bending. A lower die assembly is provided for bending the long and short edges downward, and upwardly bending both edges of the long side, and on the other side of the bed upper surface, it cooperates with the upper die device for box bending to bend the edges after edge bending. A lower die device was installed that box-bends a sheet-like workpiece and has a flange on the upper side, and box-bends the flaps extending from the side plates on the long side to the outside of both short sides. Continuous box bending equipment with special features. 3. A movable mold that can rotate from the bottom of the upper mold to the retracted position at the rear of the ram is attached to the side of the upper mold provided at the lower end of the ram, while a lower mold holder with at least one side slidable in the longitudinal direction is installed on the top of the bed. A lower mold is provided on the upper part of the mold, and a shaft is provided at one end of the lower mold to allow the lower mold to move and open the mold when the ram rises after overbending processing by the movable mold. Press brake. 4. An upper die device for box bending is provided at the lower end of the ram, and a lower die device for box bending is provided on the upper surface of the bed, and the upper die device includes a mounting plate rotatably attached to the lower end of the ram, and a center part of the mounting plate. a support member that is replaceably provided, an upper mold that is replaceably fixed to the lower end of the support member, a plurality of mold support plates that are removably mounted on the left and right bottom surfaces of the mounting plate with the support member in the center, and It consists of a work knockout member provided at the center of the front part of the plate and a mold support plate stocker provided at the rear of the ram, and the lower mold device is movable in the longitudinal direction of the frame and the front and rear frames provided on the top surface of the bed. A pair of short-side lower molds that are freely and replaceably attached, and a pair of long sides that are movable in a direction perpendicular to the longitudinal direction of the frame and abut against the end surfaces of the short-side lower molds. A press brake characterized in that it is composed of a side lower mold and a receiving mold with a cushion pad placed on the circular part of the long and short side lower mold. 5 Both ends of the short-side lower mold are on the right side for positioning the workpiece, and the holder of the lower mold is equipped with a relief cylinder that moves the lower mold slightly forward and backward in the length direction of the mold when overbending. The press brake according to claim 4.