JPH02108420A - Bending die - Google Patents

Abstract

PURPOSE:To work bending without changing the die and to improve working efficiency by performing folding closing and two steps bending through upper die assembly fitted on the ram and lower die assembly disposed on a bed. CONSTITUTION:A work is fixed through a movable clamp die 20 and fixed clamp die 30, the folding is performed using the 1st ironing bending die 28 through pressurizing force of the ram 2. Then, its part is closed using the movable clamp die 20 and fixed clamp die 30. Then, after the end part of the work performed with the folding and losing is worked by the two stepped bending using an upper die 4 and lower die bodys 13,14, then, the closing is performed using the fixed clamp die 31 of upper stage side and movable clamp die 21, to form a negative formed joinning part. Further, by inserting the end edge of the work performed folding and closing inside the negative formed joinning part, the busting work is enabled using the upper die 4 and lower die body 14.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a folding mold that allows processing such as half-folding, crushing, and two-step bending without replacing the mold.

(Prior Art) Recently, suitsuji boxes and simple cold storage containers made of PVC steel plates or colored steel plates have been widely used.

These products are usually processed using the following work flow: cutting, drilling, bending, welding, and painting. After the welding process, the welded part is sanded or hammered. It is necessary to correct the distortion,
It requires a lot of time and effort.

Therefore, product processing methods without welding have been proposed, and containers are made using caulking or adhesives.

(Problems to be Solved by the Invention) By the way, when processing by the above-mentioned non-welding, the shape of the product is complicated, for example, when the edges of the plate material are folded,
The pieces are crushed, then the long side, the short side are bent, the two-step bending is performed, and finally the joints are joined by caulking.

In each of the above-mentioned bending processes, the molds are different for each bending process, so the molds may be replaced for each bending process, or multiple bending machines equipped with different molds may be used to perform the bending process. It had to be done.

Therefore, it requires a large amount of time and personnel, and when moving from the previous process to the next process, the workpieces are piled up on the spot, so there are disadvantages in that the work space must be widened.

The present invention was made to eliminate the above-mentioned difficulties, and its purpose is to use a single mold to fold, crush, and
An object of the present invention is to provide a bending die that can perform processing such as two-stage bending.

(Means for Solving the Problems) In order to achieve the above object, the folding mold of the present invention comprises an upper mold attached to a ram and a lower mold assembly disposed on a bed, the lower mold assembly has a slide disposed on a bed, and a lower die blower having an inverted cross section disposed on the slide, and a lower die main body in which a machined groove is formed is disposed at the top of the lower die block, and The first one is on the front side.
A movable holder and a second movable holder are attached to the first movable holder so as to be able to rise and fall freely, and movable clamp molds with pressure pads are disposed on the upper and lower surfaces of the first movable holder facing in opposite directions. First and second butterfly bending molds each having a bending portion at the front end and an inclined portion at the rear end are rotatably fitted into the arc-shaped groove provided on the side of each movable clamp mold. On the lower surface of the second movable holder and the upper surface of the step of the lower block, a fixed clamp mold and a butterfly bending guide having an inclined surface at the tip are arranged at positions corresponding to the movable clamp mold and the butterfly bending mold. be.

(Function) The plate material to be processed (workpiece) is first fixed with a movable clamp die and a fixed clamp die, and is subjected to a seam bending process using the first bending die by the pressing force of the ram, and then the movable clamp is attached to the part. Crushing is performed using a mold and a fixed clamp mold. Next, the edges of the workpiece are folded and crushed using the upper and lower mold bodies, and then bent in two stages, and then crushed using the fixed clamp mold and movable clamp mold on the upper stage, and then the female mold is formed. Form a joint. Also, goby fold,
It is also possible to insert the other edge of the workpiece that has been crushed into the female joint part, and then to perform the crushing process on that part using the upper and lower mold bodies.

As shown below, the bending die of the present invention allows various bending and crushing processes to be performed without replacing the die.

(Example) The folding die of the present invention will be specifically described below based on the illustrated example.

FIG. 1 is a cross-sectional view showing one embodiment of the present invention. In the figure, reference numeral 1 denotes an upper mold assembly that is attached to a ram 2 and moves up and down vertically. , this center upper mold 3
A rotary upper mold 4 is attached to the lower end of the mold 4, which is raised and lowered and rotated by a driving means (not shown) consisting of a link mechanism and a cylinder.

Further, a lower mold assembly 5 is arranged below the upper mold assembly which vertically moves up and down.

The lower die assembly 5 includes a slide 7 placed on a bed 6,
Inverted-shaped lower mold block 8 attached to this slide 7
It has a mounting groove 9 provided at the top of the lower mold block 8.
．． 10 is provided with a lower mold body 13.14 having bending grooves 11 and 12 formed on its upper surface, and a slightly sloped notch is formed on the outer wall of the bending groove 11 of one of the lower mold bodies 13. A portion 15 is formed.

Further, on the front wall 8a of the lower mold block 8, a first movable holder 16. A second movable holder 17 is arranged so as to be movable up and down.

That is, T-shaped protrusions 8b are vertically provided at a plurality of locations on the front wall 8a of the lower die block 8 in the longitudinal direction, and the T-shaped protrusions 8b are provided in the first. T provided on the second movable boulder 16, 17
After fitting into the shaped grooves 16a and 17a and guiding the first
between the movable holder 16 and the second movable holder 17, and between the first
The springs 18 and 19 are arranged between the movable holder 17 and the stepped portion 8C of the lower mold block 8, and the 1st and 2nd movable holders 1
6.17 is configured to be movable up and down along the front wall 8a of the lower mold block 8 (FIG. 2). Movable clamp type with pad 20, 21
are arranged facing in opposite directions, and furthermore, each movable clamp mold 20.21 has a bending portion 24.25 at the front end of the circular arc groove 22.23 provided at the rear of the movable clamp mold 20.21.
However, the first section is provided with an inclined portion 26, 27 at the rear end. Second
The Koki bending molds 28 and 29 have rotating surfaces 28a and 29 at the proximal end.
It is rotatably attached by fitting a into it.

On the other hand, on the lower surface of the second movable block 17 and the upper surface of the stepped portion 8C of the lower mold block 8, which are opposite to the upper and lower surfaces of the first movable holder 16, are fixed clamp molds 30.
31 and butterfly bending guides 32 and 33 are attached.

That is, at positions 1° apart from each of the movable clamp molds 20.21 attached to the first movable holder 17, there are fixed clamp molds 30.31, and first bending molds 28. A butterfly bending guide 32.3 is located at a position corresponding to the second bending die 29.
3 is attached to the front side of the tip of each butterfly bending guide. When the second movable holder 16.17 is lowered, an inclined guide part 32a contacts the inclined part 213.27 of each block and rotates each block 16.17;
33a is formed. Furthermore, the second movable block 17
On the upper surface, a groove 34 is formed on a vertical line passing through the center of the fixed clamp mold 31 to engage with the upper mold.

Next, the operation of the folding mold having the above configuration will be explained using an example of producing a product G as shown in FIG. First, the slide 7 is moved to position the second movable holder 17 directly below the upper mold 4. Next, a rectangular workpiece plate material (
Pick up the workpiece) 40 with the front device (not shown),
One of the short sides 41 is inserted between the lower movable clamp mold 20 and the fixed clamp mold 30 to adjust the bending length.

Then, the ram 2 is lowered, and the edge 4a of the upper mold 4 and the second
The movable block 17 is engaged with the groove 34, and the ram 2
When the block is lowered, the second movable holder 17 is lowered by the pressing force of the ram 2 against the elasticity of the spring 19, and the fixed clamp die 31 and the cloth bending guide 33 attached to the second movable block 17 are moved to the first movable position. While coming into contact with the movable clamp die 21 and the second bending die 29 of the holder 16, the first movable block 16 also resists the elasticity of the spring 18,
The workpiece 40 is lowered and clamped and fixed by the movable clamp mold 20 and the fixed clamp mold 30. more ram 2
When the first movable holder 16 is lowered, the first movable holder 16 continues to descend, and the edge of the workpiece 40 fixed to the movable clamp mold 20 and the fixed clamp mold 30 is bent by the bending part of the first bending mold 28, as shown in FIG. It is bent downward by 24. When the first movable holder 16 further descends, the inclined guide portion 32a of the butterfly bending guide 32 of the lower mold block 8
It comes into contact with the inclined part 26 of the first bending die 28, and by this inclined guide part 32a, the first bending die 28 rotates clockwise in FIG. (Figure 3). Here, the ram 2 is raised d, the first movable holder 16 and the second movable holder 11 are raised to their original positions by the restoring force of the springs 18 and 19, and the workpiece 40 is pulled out, and further, As shown in FIG. 4, the bent portion is clamped between the movable clamp mold 20 and the fixed clamp mold 30, and the ram 2 is lowered and crushed in the same manner as the bending process, and one of the short sides 41 is bent and crushed. terminate. Then,
The workpiece W is rotated, and the other short side 42 is bent and crushed in the same manner as described above. Next slide 7
is moved to position the undesirable body 13 directly below the upper mold 4.

Then, one of the workpieces 40, whose edges have been crushed, is placed on the lower die 13, and when the ram 2 is lowered, the edge 4a of the upper die 4 and the bending groove 10 of the lower die body 13 are cut. Due to the notched slope portion 15, the end portion of the workpiece 40 is bent in two steps as shown in FIG. Next, raise ram 2,
While taking out the workpiece 40, move the slide 7,
The second movable block 17 is positioned below the upper mold 4. Then, as shown in FIG. 6, a corner part 45 of the workpiece 40 bent in two stages is placed at the front end position between the fixed clamp mold 31 and the movable clamp mold 21, and the ram 2 is machined to form the fixed clamp mold 31. The front end 31a is crushed, and the seventh
As shown in the figure, a product having a female-type engaging portion 46 at the tip can be manufactured.

Further, if necessary, the female type engaging part 46 and a separately formed male type engaging part can be engaged with each other, and an upper mold and a lower mold can be used to perform a crushing process.

In addition, in the explanation of the above-mentioned operation, the explanation was given separately for each fold, but it goes without saying that in actual bending, this is carried out automatically and continuously by NG control or the like.

(Effects of the Invention) Since the present invention has the above-mentioned configuration, it is possible to perform various oiling and crushing operations without replacing the mold with a one-stand bending machine, and it is possible to perform various oiling and crushing operations without replacing the mold. This not only helps in the process of bending, but also allows the bending process to be carried out efficiently.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view showing the attachment state of the lower die block and the first movable holder, and Figs. 3 to 6 are views showing the folded state. , FIG. 7 is a side view of the folded product. DESCRIPTION OF SYMBOLS 1... Upper die assembly, 2... Ram, 3... Center upper die, 4... Rotating upper die, 4a... Edge, 5... Lower die assembly, 6... Bed, 7...Slide, 8...
Lower mold block, 8a...Front wall, 8b...Protrusion, 8
C...Step, 9.10.34...Groove, 11, 12.
・Bending groove, 13.14 ・Lower mold body, 15.
・Notch inclined portion, 16...first movable holder, 16
a, 17a... T-shaped groove, 17... Second movable holder, 18.19... Spring, 20.21... Movable clamp type, 22.23... Arc-shaped groove, 24.25・
...bending part, 26.27...slanted part, 28...
1st bending mold, 28a, 29a... rotating surface, 29.
・・Second bending mold, 30.31・Fixed clamp type, 32° 33・Blank bending guide, 32a, 33a・
・Incline guide part Fig. 4

Claims (1)

[Claims] 1. Consists of an upper die assembly attached to a ram and a lower die assembly placed on a bed, and the lower die assembly includes a slide placed on the bed and a slide placed on the slide. The lower mold block has an inverted L-shaped lower mold block, and a lower mold body in which a processing groove is formed is disposed at the top of the lower mold block, and a first movable holder and a second movable holder are arranged on the front side. is attached to the first movable holder so that it can be raised and lowered via a support means, and movable clamp molds with pressure pads are disposed on the upper and lower surfaces of the first movable holder facing in opposite directions, and on the sides of each of the movable clamp molds. First and second bending molds each having a bending portion at the front end and an inclined portion at the rear end are rotatably fitted into the arc-shaped groove provided in the second movable holder. A bending mold, in which a fixed clamp mold and a flat bending guide having an inclined surface at the tip are arranged on the upper surface of the stepped part of the mold block at positions corresponding to the movable clamp mold and the flat bending mold. 2. The folding mold according to item 1, wherein the supporting means is a spring arranged between the first movable holder and the second movable holder, and between the first movable holder and the lower mold block.