JPH04729B2 - - Google Patents

Description

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

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

These products are usually processed through a process of cutting, drilling, bending, welding, and painting plate materials, but after the welding process, the welded part is sanded or the distortion is corrected with a hammer. It is necessary to carry out the work, which requires a great deal of effort and manpower.

Therefore, a product processing method without welding was proposed,
Containers are made using caulking or adhesive.

(Problems to be Solved by the Invention) By the way, regarding the processing without welding,
If the shape of the product is complex, for example, after the edges of the plate are folded, the edges are flattened, then the long and short sides are bent, two-step bending is performed, and the joints are finally joined by caulking. I'm letting you do it.

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. I had to do it.

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 a large work space must be provided.

The present invention has been made to eliminate the above-mentioned drawbacks, and its purpose is to provide a folding die that can perform processes such as half-folding, crushing, and two-stage bending using a single die.

(Means for Solving the Problems) In order to achieve the above object, the folding die of the present invention comprises an upper die attached to a ram and a lower die assembly disposed on a bed, the lower die assembly being has a slide placed on a bed, and a lower die block with an inverted L-shaped cross section placed on the slide, and a lower die body in which a machined groove is formed is placed on the top of the lower die block. A first movable holder and a second movable holder are attached to the front side via support means so as to be able to rise and fall freely, and movable clamp molds with pressure pads are mounted on the upper and lower surfaces of the first movable holder facing in opposite directions. The first and second bending dies, each having a bending portion at the front end and an inclined portion at the rear end, are arranged in arcuate grooves provided on the sides of each of the movable clamp dies, and are rotatable. On the other hand, on the lower surface of the second movable holder and the upper surface of the stepped part of the lower block, a fixed clamp mold and a Koki bending mold having an inclined surface at the tip are fitted at positions corresponding to the movable clamp mold and the Koki bending mold. A guide has been placed.

(Function) The plate material to be processed (work) is first fixed with a movable clamp die and a fixed clamp die, and is subjected to a seam folding process using the first bending die by the pressing force of the ram, and then the above-mentioned Crushing is performed using a movable clamp type and a fixed clamp type. Next, the ends of the workpiece are bent in two stages using the upper mold and lower mold bodies, 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. It is also possible to insert the other edge of the workpiece that has been folded and crushed into the female die joint, and then use the upper and lower mold bodies to crush (crimp) that part. be.

As described above, 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, and reference numeral 1 in the figure is an upper mold assembly that is attached to a ram 2 and moves up and down vertically. A rotating upper mold 4 is attached to the lower end of the upper mold 3 and is moved up and down and rotated by a drive means (not shown) consisting of a link mechanism and a cylinder.

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

The lower mold assembly 5 includes a slide 7 placed on a bed 6 and an inverted L-shaped lower mold block 8 attached to the slide 7. 10 includes lower mold bodies 13 and 14 having bending grooves 11 and 12 formed on the upper surface.
is disposed, and a slight notch slope portion 15 is formed on the outer wall of the bending groove 11 of one lower die main body 13.

Further, on the front wall 8a of the lower die block 8, there are a first movable holder 16 and a second movable holder 17.
are arranged so that they can be raised and lowered.

That is, T-shaped protrusions 8b are vertically provided at multiple locations in the longitudinal direction of the front wall 8a of the lower die block 8, and T-shaped protrusions 8b are provided on the first and second movable holders 16 and 17. After being fitted into the shaped grooves 16a, 17a and guided, the springs 18, 19 are inserted between the first movable holder 16 and the second movable holder 17, and between the first movable holder 17 and the stepped portion 8c of the lower die block 8. Place the first and second movable holders 1
6 and 17 are configured to be able to move up and down along the front wall 8a of the lower mold block 8 (FIG. 2).

In the first movable holder 16, movable clamp molds 20 and 21 with pressure pads are arranged near the front ends of the upper and lower surfaces, respectively, facing in opposite directions, and each of the movable clamp molds 2
First and second bending molds 28 are provided with bending portions 24 and 25 at the front end of the upper surface and inclined portions 26 and 27 at the rear end of the arcuate grooves 22 and 23 provided at the rear of the parts 0 and 21, respectively. , 29 are the rotating surfaces 28a, 2 at the base end.
9a and is rotatably attached.

On the other hand, on the lower surface of the second movable block 17 and the upper surface of the step portion 8c of the lower mold block 8, which are opposite to the upper and lower surfaces of the first movable holder 16, there are fixed clamp molds 30, 31 and a bending guide 3, respectively.
2,33 is attached.

That is, at a position corresponding to each movable clamp mold 20, 21 attached to the first movable holder 17,
Coki bending guides 32 and 33 are attached to the positions corresponding to the fixed clamp molds 30 and 31 as well as the first coki bending die 28 and the second coki bending die 29,
When the first and second movable holders 16 and 17 are lowered on the front side of the tip of each of these bending guides,
An inclined guide portion 32 that contacts the inclined portions 26 and 27 of each block and rotates each block 16 and 17.
a, 33a are formed. Furthermore, a groove 34 is formed on the upper surface of the second movable block 17 on a vertical line passing through the center of the fixed clamp mold 31 to engage with the upper mold.

Next, regarding the action of the folding die with the above configuration,
An example of producing a product G as shown in FIG. 7 will be explained. First, move slide 7 and
A movable holder 17 is positioned directly below the upper mold 4.
Next, a rectangular workpiece 40 is picked up by 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, and the bent length is determined. Adjust.
Then, the ram 2 is lowered, and the edge 4a of the upper mold 4 is
and the groove 34 of the second movable block 17,
When the ram 2 is further 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 mold 31 attached to the second movable block 17 and the bending guide 33
is the movable clamp mold 21 of the first movable holder 16
and the second bending mold 29, and the first
The movable block 16 also descends against the elasticity of the spring 18, and the workpiece 40 is moved in and fixed by the movable clamp die 20 and the fixed clamp die 30. When the ram 2 is further lowered, the first movable holder 16 continues to descend, and the edge of the workpiece 40 fixed to the movable clamp die 20 and the fixed clamp die 30 is bent by the first bending die 28 as shown in FIG. It is bent downward by the bending portion 24. When the first movable holder 16 further descends, the inclined guide portion 3 of the bending guide 32 of the lower die block 8
2a 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. Fold the edges at an acute angle (Figure 3). At this point, the ram 2 is raised, the first movable holder 16 and the second movable holder 17 are raised to their original positions by the restoring force of the springs 18 and 19, and the workpiece 40 is pulled out.
Furthermore, as shown in FIG. 4, the bent portion is inserted into the movable clamp mold 20 and the fixed clamp mold 30, and the ram 2 is lowered to crush it in the same way as in the bending process, and one of the short sides 41 is bent. Finish the crushing process. Next, the workpiece W is rotated and the other short side 42 is bent and crushed in the same manner as described above. Next, the slide 7 is moved to position the lower mold body 13 directly below the upper mold 4. Then, one of the workpieces 40 whose edges have been crushed is placed on the lower mold 13, and the ram 2
When lowered, the edge 4a of the upper mold 4 and the lower mold body 1
As shown in FIG. 5, the end portion of the workpiece 40 is bent in two stages by the bending groove 10 and the notched slope portion 15 of No. 3. Next, raise ram 2 and work 4
0 is taken out and the slide 7 is moved to position the second movable block 17 below the upper mold 4. Then, as shown in FIG.
The ram 2 is placed at the front end position between the fixed clamp mold 31 and the movable clamp mold 21, and the front end 31a of the fixed clamp mold 31 is crushed, and as shown in FIG. A product with 46 can be obtained.

Further, if necessary, it is possible to engage the female engaging portion 46 with a separately formed male engaging portion and perform a crushing (caulking) process using an upper die and a lower die.

In the explanation of the above-mentioned action, the explanation was given separately for each bend, but it goes without saying that in actual bending, this is done automatically and continuously by NC control or the like.

(Effects of the Invention) Since the present invention has the above-described configuration, a single bending machine can perform various bending, crushing, and
This not only helps in saving manpower and equipment, but also allows the bending process to be carried out efficiently.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
The figure is a sectional view showing the attachment state of the lower mold block and the first movable holder, FIGS. 3 to 6 are views showing the folded state, and FIG. 7 is a side view showing the folded product. 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, 8c...Step, 9, 10, 34...Groove, 1
DESCRIPTION OF SYMBOLS 1, 12... Bending action groove, 13, 14... Lower die main body, 15... Notch inclined part, 16... First movable holder, 16a, 17a... T-shaped groove, 17...
Second movable holder, 18, 19... spring,
20, 21...Movable clamp type, 22, 23...
Arc-shaped groove, 24, 25...bending portion, 26, 2
7... Inclined part, 28... First job bending mold, 28
a, 29a...Rotating surface, 29...Second bending type, 30, 31...Fixed clamp type, 32, 33
... Koki bending guide, 32a, 33a... Inclined guide portion.

Claims (1)

[Scope of 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. and an inverted L-shaped lower mold block, and a lower mold main body in which a processing groove is formed is disposed at the top of the lower mold block, and a first mold body is disposed on the front side.
A movable holder and a second movable holder are attached to the movable holder via support means 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, respectively. First and second bending dies each having a bending portion at the front end and an inclined portion at the rear end are rotatably fitted into the arcuate grooves provided on the sides of each of the movable clamp dies; , on the lower surface of the second movable holder and the upper surface of the stepped portion of the lower mold block, a fixed clamp mold and a coki bending guide having an inclined surface at the tip are arranged at positions corresponding to the movable clamp mold and the coki bending mold. A folding type. 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.