JPS6359766B2 - - Google Patents

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] A panel made by bending each of the four sides of a rectangular worksheet at right angles can be used for cabinets, show cases,
Used in vending machines, refrigerators, air conditioners, computer units, various office machines, etc. To make such a panel, use a press brake, wing bender (folding machine), coki bender (wipe bender), etc., and use a press brake, wing bender (folding machine), coki bender (wipe bender), etc. After bending the part, turn the workpiece in a plane and align the length of the upper die (punch) or clamp die (hereinafter simply referred to as the upper die) with the inside of the short side bend, and then bend the long side edge. I'm getting it.
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 37 to perform short side bending, then rotate the workpiece 90 degrees to bend one long side edge 38, and further rotate 180 degrees to bend the other long side edge 39. The product is made by bending each of the four edges at right angles.

In the above processing, the long side edge 38,
39, when bending the already bent short side (edges 36 and 37 in Figure 8)
Therefore, the length of the upper die of the bending machine must be 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. A large number of upper molds with different mold widths were prepared, and the molds were manually converted 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 mold changing device described above is complicated and expensive. 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 Problems] In order to achieve the above object, the present invention provides a reference upper mold at the lower part of the ram, and a plurality of divided upper molds are slidably disposed on one side of the reference upper mold. At the same time, on the other hand, a plurality of adjustable upper molds each having a length equal to one divided upper mold are removably disposed, and a slide bar is placed horizontally in front or behind the row of divided upper molds to adjust the length of the workpiece. An upper mold length converting device is constructed by movably attaching a claw member that creates a gap between the divided upper molds selected accordingly.

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 pinion, so the claw member is engaged at the position of the divided upper mold where clearance is required. after,
By slightly moving the mold, the length of the mold can be set in accordance with the bending length of the work, and after both short sides have been bent, the long side of the work can be accurately bent.

[Example] Next, the present invention will be specifically described based on the drawings. The following example shows the case where the present invention is applied to a coki bender. 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 sectional view taken along the line - in FIG. An upper mold assembly 10 is provided by fixing the upper mold assembly 10, and a lower mold assembly 11 comprising a lower mold 4, a receiving mold 5, and a reaction force receiving member 6 is fixed to the upper surface of the head 3 opposite to the upper mold assembly 10.

As shown in FIG. 1, the upper mold assembly 10 includes a reference upper mold 7, a number of divided upper molds 81, 82... (seven in the illustrated example) connected to one of the upper molds 7, and a reference upper mold 7. The adjustment upper mold 9 is connected to the other end of the upper mold and has a length equal to one divided upper mold.
All of the above-mentioned upper molds have a T-head or an L-shaped head 13 which engages in a groove 14 formed in the underside of the beam 2 (FIG. 3) and is movable in the longitudinal direction of the beam. There is. However, the reference upper die 7 is fixed to the beam using a fastener (not shown), and only when centering of the upper die is necessary depending on the size of the workpiece, can it be loosened and moved to the left or right position. can be shifted. For example, the upper mold group includes one standard upper mold 400mm, and a divided upper mold 100mm.
x7 pieces, the width is 100mm using multiple adjustment molds, and the width is 1200mm using all the molds. The adjustable upper mold in the illustrated example consists of 6 pieces in total, 1 piece of 50 mm x 5 pieces, 5 pieces of 10 mm.
x 1, a total of 4 sheets, 40mm x 1, 20mm x
2. Various changes may be made, such as a total of 6 sheets, 1×10 mm and 2×5 mm.

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

The claw member 20 has a first claw 25 and a second claw 26 that can be engaged with the recesses 18 formed in the front surfaces of the split upper molds 81, 82, . . . . 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 a slide bar 17.
3 can move forward and backward in a direction perpendicular to the slide bar 17. The first claw 25 is integrally formed in the direction of extension from one end of the claw body 24, while the second claw 26 is formed integrally in the direction of extension from the other end of the claw body 24 at a position facing the first claw 25. It is supported so that it can rotate freely, as if appearing and disappearing. Second
The claw 26 is shaped like a downward key as shown in FIG. And a spring 30 is inserted between the pins 31 and 32 provided on the end of the horizontal side 27 and the claw body.
, so that the claw 26 always tends to protrude downward. However, this pawl 26 is limited to a position in which it projects parallel to the first pawl 25 by a stopper 29, and is prevented from rotating inward beyond that position. In Figures 1 and 2, in order to simplify the explanation, one side of the standard upper mold 7 with a length of 400 mm is
A case is shown in which seven split upper molds 81, 82, . In addition, FIG. 1 shows a length of 1200 mm using all of the above-mentioned upper molds, and the first claw 25 of the claw member 20 and the split upper mold 8.
1 recess 18 is located at the center of the machine, and the cylinder mechanism 1
5 shows a state in which the rod 16 is pulled to the right and the reference upper mold 7 and the divided upper molds 81, 82, . . . , 87 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 860 mm from the original position shown in Figure 1 will be described.

First, rotate the pinion 19 and slide bar 1.
7 to the right in Figure 1 by 400mm. Next, the cylinder mechanism 22 of the claw member 20 is operated to move the first claw 25 to the fifth split upper mold 85 as shown in FIG.
to engage the recess 18 of. After engaging in this manner, the mold clamping cylinder 15 is loosened and at the same time the slide bar 17 is moved to the right by about 20 mm. Due to this movement, the divided upper molds 85, 86, and 87 move as a group to the right by the same distance, so the fourth
The second claw 26 of the claw member 20 is inserted into the recess 18 of the divided upper mold 84, and a gap 83 of about 20 mm is formed between this divided upper mold 84 and the fifth divided upper mold 85 ( Figures 2 and 6).

Next, after setting an upper mold length of 800 mm with the standard upper mold 7 and the four divided upper molds 81 to 84, remove the outer four 10 mm molds from the left adjustment upper mold 9, and make a 50 mm thick one. So, leaving the 60mm of 10mm x 6 pieces as is, the total length of the upper mold is 680mm. 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 recesses 18, 18, and the mold clamping cylinder 15 is activated. The gap 33 is eliminated and the entire upper mold is made 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 FIGS. 1 and 2, since the number of split upper molds is small, the slide bar 17
Although it is possible to fill the gaps in each split upper die within the stroke range of The stroke must be long. Therefore, as shown in FIG. 7, claw members 20A are attached to the tip and center of the slide bar 17.
20B, and actuate the claw member 20A or 20B that is closer to the selected clearance position. That is, the claw member 20A at the tip of the slide bar 17 is used to create gaps in the right half of the divided upper mold row from the center, and the claw member 20B is used to create gaps in the grain size in the left half of the divided upper mold row from the center. The stroke of the slide bar 17 is divided into 1/1 of the length of the upper die row.
2, the protrusion length of the slide bar to the side of the machine can be kept relatively small. In this case, the cylinder mechanism 22 of either of the claw members 20A, 20B is actuated to engage the first claw 25 in the recess of a predetermined divided upper mold, and then the second claw 26 is inserted into the adjacent divided upper mold. By slightly moving the slide bar while engaging with the recess 18 of the mold, a gap can be created at a predetermined position of the divided upper mold, and the four-side 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 engaged in 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 working state, FIG. 3 is an enlarged sectional view taken along the - line in FIG. 2, FIG. 4 is an enlarged front view of the claw member, and FIGS. FIG. 7 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, 3... Lower mold, 5... Receiving mold,
6...Reaction force receiving member, 7... Reference upper mold, 81, 82~
87...Divided upper mold, 9...Adjustable upper mold, 15...mold clamping cylinder, 16...rod, 17...slide bar,
18... recess, 19... pinion, 20, 20A, 2
0B... Claw member, 22... Cylinder mechanism, 24... Claw body, 25, 26... Claw, 28... Stud, 29... Stopper, 30... Spring, 33... Clearance.

Claims (1)

[Claims] 1. A bending method that performs V-bending, folding bending, or flat-bending by changing the length of the upper mold according to the length of the workpiece by sliding the split upper mold inserted and supported at the lower part of the ram. The machine is equipped with a reference upper mold at the lower part of the ram, a plurality of slidable split upper molds 81, 82, etc. on one side of the reference upper mold, and one split upper mold with a plurality of pieces. Adjustable upper molds 9 of equal length are removably disposed, and a slide bar 17 is placed horizontally in front or behind the row of divided upper molds to create a gap between the divided upper molds selected according to the length of the workpiece. An upper mold length converting device for a bending machine, characterized in that a claw member 20 is movably attached. 2 The outermost split upper mold is the mold clamping cylinder 15
An upper mold length converting device for a bending machine according to claim 1, wherein the cylinder rod 16 passes through an intermediate divided upper mold group and is fixed to the reference upper mold 7. 3. The claw members are attached to the tip and middle of the slide bar 17, respectively.
The upper die length conversion device described in Section 1. 4 The claw member 20 includes a cylinder mechanism 22 provided on the slide bar 17, 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 a claw body 24 that protrudes from both ends of the claw body 24. The first and second parts can be engaged with the recesses 18 of the split upper mold.
When the claw body 24 advances, 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, and
The claw 26 is capable of engaging with a recess 18 of the split upper die that contacts the inside of the rising edge when a gap is created between the split upper molds that sandwich the rising edge of the workpiece after the claw body advances. An upper mold length converting device for a bending machine according to claim 1.