JPS61283421A - Device for changing length of upper die of bending machine - Google Patents

Abstract

PURPOSE:To exactly bend the four sides of works having different sizes in the stage of subjecting the four sides of the rectangular work sheet to square bending by constituting an upper die for bending of a standard upper die and plural pieces of split upper dies on one side and adjusting upper die on the other side. CONSTITUTION:The upper die for bending the work is constituted of the standard upper die 7, the plural split upper dies 81-87 on one side thereof and the adjusting upper die 9 on the other side in the stage of forming a cabinet, etc. by square bending the four sides of the work sheet. A slide bar 17 provided with a claw member 20 is provided above the upper die. The slide bar 17 is moved toward the right by the actuation of a pinion 19 and the split upper dies are increased or decreased according to the size of the work sheet 35 to match the size. Claws 25, 26 are inserted into the recesses of the split upper dies 84 and 85 to provide a gap 33 between both upper dies. The long side or short side of the work sheet 35 is bent square in this state. The claw member 20 is then pulled up to eliminate the gap 33 between the split upper dies 84 and 85 and the work sheet is rotated 90 deg., then the short side or long side is again bent square by the above-mentioned, by which the work sheet is formed to a cabinet shape.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device that is capable of changing the length of the upper mold of a folding machine depending on the width of folding a worksheet.

[Prior Art] Panels made by bending each of the four sides of a rectangular worksheet at right angles are used in cabinets, showcases, vending machines, refrigerators, air conditioners, computer units, various office machines, etc. There is. Press brake, wing bender (folding machine) to make such panels
Alternatively, use a wipe bender or the like to bend the short side edges of a worksheet (hereinafter simply referred to as the work) that has been cut into quadrilaterals, and then turn the work in a plane to the inside of the short side bevel. Upper die (punch) or clamp die (
This is obtained by bending the long side edges to match the lengths (hereinafter simply referred to as "shi").

For example, as shown in FIG. 8, one short edge (or rising edge) 36 of the workpiece 35 is bent at a right angle (or nearly right angle), the workpiece is rotated 180 degrees on the handling table, and the other short edge Bend the part 31 to perform a short side bevel, then rotate the workpiece 90 degrees to bend one long edge 38, and further rotate 180 degrees to bend the other long edge 39. The product is made by bending each of the four edges at right angles.

In the above processing, when bending the long side edges 38, 39, there is a rise due to the bending of the short side that has already been bent (edges 36, 37 in Fig. 8). The length of the upper mold of the machine is the length of the long side minus two workpiece plate thicknesses, and it is necessary to avoid interference with the rising edge of the short side. The molds were manually replaced each time the workpiece width changed.

[Problems to be solved by the invention] In order to improve these drawbacks, the upper mold is made into a split type, and molds with different lengths are combined, and the required number of split upper molds is slid according to the length of the workpiece. A method is adopted in which the vehicle is moved backwards or flipped 180 degrees backwards. However, in the conventional device, the above-mentioned mold changing device is complicated and has an octavalent device. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a device that has a simple structure and allows easy conversion of the length of the upper mold. [Means for Solving the Problem] In order to achieve the above object, the present invention provides 13 tabletop molds at the lower part of the ram, and a plurality of split upper molds that can be slid freely on one side of the reference upper mold... ..., and on the other hand, a plurality of adjustable upper molds having the same length as one divided upper mold are removably disposed, and a slide bar is horizontally mounted in front or behind the row of divided upper molds. The upper mold quality converting device is constructed by movably attaching a claw member that creates a gap between the divided upper molds selected according to the length of the workpiece.

The slide bar can be moved left and right along the row of divided upper molds by operating a linear reciprocating mechanism such as a rack and pinion. By engaging and moving slightly, the mold length can be adjusted according to the bending length of the workpiece, and after both short sides have been bent, the long side of the workpiece can be bent accurately. can be done.

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

The following example shows the case where the present invention is applied to a coki bender. FIG. 1 is a front view schematically showing the device of the present invention, FIG. 2 is a front view of the device in operation, and FIG. 3 is an enlarged cross-sectional view taken along the line ■-■ in FIG. beam 2
A mold assembly 10 is provided, and a lower mold assembly 11 comprising a lower mold 4, a receiving mold 5, and a reaction force receiver 6 is secured to the upper surface of the head 3 opposite thereto.

The upper mold assembly 10 includes a reference upper mold 7 and a reference upper mold 7, as shown in FIG.
A large number of split upper molds 81, 82, connected to one side of the upper mold 7.
... (seven pieces in the illustrated example), and an adjustable upper mold 9 which is connected to the other side of the reference upper mold 7 and has a plurality of pieces and has a length equivalent to one divided upper mold. The upper mold of the above 1 is ■
It has a head or an L-shaped head 13, which is the beam 2.
The beam is engaged with a groove 14 formed on the lower surface of the beam (FIG. 3) so as to be able to move in the longitudinal direction of the beam. However, the reference upper die 7 is fixed to the beam using a fastener (not shown), and only when it is necessary to center the upper die due to the size of the workpiece, can it be loosened and shifted to the left or right. can be done. For example, the upper type group is j! l! Semi-upper mold 400mm x 1 piece, split upper mold 100me x 7
100IIlfll with multiple adjustment molds, and using all the molds? 200ia+I! Let it be A. The adjustment upper mold in the illustrated example is 501IllX1 piece, 10++a+X5
It is composed of 6 sheets in total, 40111X 1.3
40I! 1III×1.20II
IIll×2.10IIIll×1.5■×2, total 6
Various changes may be made, such as a single sheet configuration.

In front of the divided upper die row, as shown in FIGS. 1 and 3, a slide par 17 that can move along the divided upper mold row is arranged, and a claw member 20 is attached to this.

The pawl member 20 has a first pawl 25 and a second pawl that can engage with the recess 18 formed on the front surface of the split upper die 81, 82...
It has a claw 26. As shown in FIG. 3, this claw member 20 is attached to a piston rod 23 of a cylinder mechanism 22 fixed to a bracket 21 fixed to the slider 17, and can move forward and backward in a direction perpendicular to the slider 17 by expanding and contracting the piston rod 23. It looks like this. The first claw 25 is formed integrally with the side 1 extending from one end of the claw body 24, but the second claw 2G is formed at a position opposite to the first claw 25 from the other end of the claw body 24. Each time it appears and retracts in the extension direction (it is rotatably supported
As shown in an enlarged view in FIG. 4, it has a downward key shape and has a pin hole approximately in the center of its horizontal side 27, through which the stud 28 placed on the front of the claw body 24 is passed, and the horizontal side A spring 30 is applied between the pins 31 and 32 provided on the end of the mold 27 and the nail body, so that the mold 26 always tends to protrude downward. However, this claw 26 is limited to a position in which it protrudes parallel to the first claw 25 due to the stopper 29.
It is prevented from rotating further inward. In order to simplify the explanation, Figs. 1 and 2 show that seven divided upper molds 81, 82...87 each having a length of 100 mm are movably attached to one side of the reference upper mold 7 having a length of 400 mm. The case is shown in which an adjustable upper mold 9 composed of 5 pieces of 50 mm x 1.1101 II x 5 sheets is removably provided on the other side. In addition, in FIG. 1, the length is 1200n+m using all the upper molds mentioned above, the first claw 25 of the claw member 20 and the recess 18 of the split upper mold 81 are located at the center of the machine, and the rod 16 is moved to the right by the cylinder mechanism 15. The reference upper mold 7 and the divided upper mold 81 are drawn to each other.
．． 82...87 show a state in which the molds are clamped in series. Note that the reference numeral 40 in FIG. 1 is a mold clamping screw means on the adjustable upper mold 9 side.

Next, the operation of the above device will be described. The case where the upper mold length is set to 8601111 from the original position shown in FIG. 1 will be described.

First, rotate the binion 19 to move the slide par 17 to the first position.
Move it 400mm to the right in the figure. Next, the cylinder mechanism 22 of the claw member 20 is operated to engage the first claw 25 with the recess 18 of the fifth split upper mold 85, as shown in FIG. After engaging in this way, loosen the mold clamping cylinder 15 and simultaneously move the slider 17 to the right 201
Move it about 11. This movement splits the upper mold 85.86
．． 87 as a group and move to the right by the same distance, the second claw 2 of the claw member 20 is inserted into the recess 18 of the fourth split upper die 84.
6 is put in, and this divided upper mold 84 and the fifth divided upper mold 8
A gap 33 of about 20 mm is formed between the base plate and the base plate 5 (FIG. 2, No. 6).

Next, after setting the upper mold quality 8001 flll with the standard upper mold 7 and the four divided upper molds 81 to 84, remove the outer 10 mm + 4 molds from the left adjustment upper mold 9 and make a 50 mm thick one. Then, leaving the 60mm of 10mm x 5 sheets as is, we finished setting the total length of the upper mold 680nu++. After doing this, as shown in Fig. 2, the workpiece 35 is placed so that the rising sides 36 and 37 of the short side are in the gap 33 with the adjustment upper mold 9, and the lowering of the ram causes the workpiece to be moved between the upper and lower molds. Fold the long side 38 or 39 (Figure 3).

After the bending is completed, the cylinder mechanism 22 is returned to raise the claw member 20, the first claw 25 and the second claw 26 are simultaneously removed from the four parts 18 and 18, and the cylinder 15 for mold clamping is removed.
is operated to eliminate the gap 33 and make the entire upper mold into a series.

FIG. 7 shows a modification in which a large number of split upper molds 81, 82, . . . are used. In the embodiment shown in Fig. 1.2, the number of split upper molds is small, so the clearance of each split upper mold can be achieved within the range of stroke 1 to stroke of the slider 17. If we use a division of 10%, in order to cover the entire gap in the upper die, the loaf of the slider must be made longer. Therefore, the seventh
As shown in the figure, the claw members 2 are attached to the tip and center of the slide bar 11.
0^, 20B is attached, and the claw member 20A or 203 that is closer to the selected gap opening position is operated. In other words, the claw member 20A at the tip of the slide bar 17 is used to open a gap at a position to the right of the center of the divided upper die row.
[3 is by dividing the left half grain m gap from the center of the divided upper mold row to keep the stroke of the slide bar 17 to 172, which is the length of the divided upper mold row, so that the slide bar protrudes to the side of the machine. The length can be kept relatively small. Also in this case, any of the claw members 20A.

The cylinder mechanism 22 of 20B is actuated to engage the first claw 25 with the recess of the predetermined split upper mold, and the second claw 26 is engaged with the four parts 18 of the adjacent split upper mold, thereby removing the slide bar. By slightly moving the upper die, a gap can be created at a predetermined position of the split upper mold, and the 4-dialysis bending process can be performed accurately.

[Effects of the Invention] As described above, according to the present invention, the slide bar is movable left and right along the row of divided upper molds, so that the slide bar can be moved left and right along the row of divided upper molds. The claw member can be adapted to the position, and the four sides of the workpiece can be bent accurately.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of the length conversion device of the present invention, Fig. 2 is a schematic front view of the same operating state, and Fig. 3 is a schematic front view of the length conversion device of the present invention.
4 is an enlarged front view of the claw member,
5 and 6 are front views showing the operation of the claw member, and FIG.
The figure is a schematic front view of a modification of the present invention, and FIG. 8 is a perspective view of a worksheet. 1... Ram, 2... Beam, 4... Lower die, 5...
・Receiving mold, 6...Reaction force receiver is a member, 7... Reference upper mold, 8
1.82-87...Divided upper mold, 9...Adjusted upper mold, 1
5... Mold clamping cylinder, 16... Rod, 11.
... Slide bar, 18... Recess, 19... Binion, 20.20A, 20B... Claw member, 22... Cylinder mechanism, 24... Claw wooden body, 25.26... Claw ,
28...Stud, 29...Stopper, 30...
Spring, 33... gap.

Claims (1)

[Claims] 1. By sliding the divided upper mold inserted and supported at the lower part of the ram, the length of the upper mold is changed according to the length of the workpiece, and the V
This is a bending machine that performs bending, folding, or flat bending, and includes a reference upper die provided at the lower part of the ram, and a plurality of divided upper dies (81) (82) that can be slid freely on one side of the reference upper die.
In addition, an adjustable upper mold (9) consisting of a plurality of sheets and having the same length as one divided upper mold is removably disposed, and a slide bar ( 1
7) A device for converting the length of an upper mold of a bending machine, characterized in that a claw member (20) is movably attached to horizontally suspend the upper mold and create a gap between the divided upper molds selected according to the length of the workpiece. 2. A patent claim in which the outermost split upper mold has a clamping cylinder (15), and the cylinder rod (16) passes through the middle split upper mold group and is fixed to the reference upper mold (7). The upper mold length converting device for the bending machine according to item 1. 3. The upper mold length converting device according to claim 1, wherein the claw members are respectively attached to the tip and middle of the slide bar (17). 4 The claw member (20) includes a cylinder mechanism (22) provided on the slide bar (17), and a claw body (24) that is attached to the piston rod end of the cylinder mechanism and can move forward and backward toward the recess of each split upper mold. and first and second claws (
25) and (26), the first claw (25) directly engages with the recess (18) of the split upper mold that contacts the outer position of the rising edge of the workpiece by advancing the claw body (24), and Claws of(
26) is capable of engaging with the recess (18) of the split upper mold that is in contact with the inside of the rising side when a gap is created between the split upper molds that sandwich the rising side of the workpiece after the claw body advances. An upper mold length converting device for a bending machine according to claim 1.