JPH0515376Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a hemming device for hemming and bending a workpiece.

[Conventional technology]

Generally, hemming processing equipment is an independent type (dedicated)
There are hemming devices and mold type one-step hemming devices (for example, Japanese Utility Model Application Publication No. 1984-1904).

[The problem that the idea aims to solve]

The former method is suitable for mass production, but requires a large facility area because it uses dedicated equipment for each of the preliminary bending process and the main bending process, and there are also problems in storing processed parts.

The latter method is efficient because all the processing is done at the same time, but since complicated bending is done at the same time using one device, the structure is complicated and the cost is high.Each part is easy to break, so maintainability is poor, and the service life is shortened. short.

This invention was made in view of the above, and its purpose is to have a simple structure without requiring a large equipment area, and to
Cost reduction, maintainability, and long life.
Moreover, it is an object of the present invention to provide a hemming processing device that is advantageous in terms of mass production and efficiency.

[Means to solve the problem]

The structure of the present invention that achieves the above object consists of a pair of upper and lower press dies consisting of a fixed lower press die and a movable upper press die, a preliminary bending section for performing preliminary bending, and a main bending section for completely bending the preliminary bending process. A processing section is provided separately, and a self-weight conveyance mechanism is provided for transporting the workpiece from the preliminary bending section to the main bending section and from the main bending section to the outside of the apparatus. It is.

[Effect]

If a pair of upper and lower press dies consisting of a fixed press upper die and a movable press upper die are provided with a preliminary bending section for performing preliminary bending and a main bending section for completely bending the preliminary bending, it is possible to Compared to equipment that is dedicated to bending and main bending, the area of the entire press die is smaller.
Does not require a large facility area. Therefore, it also results in cost reduction.

Also, the workpiece is put into the pre-bending section,
When the pre-bending workpiece is transported to the main bending section and lowered through a pair of upper and lower presses, the preliminary bending and main bending are performed simultaneously. Then, by transporting the pre-bending workpiece and the main bending workpiece out of the apparatus and repeating these operations, the hemming process can be performed in mass production and efficiently.

Furthermore, if a preliminary bending section and a main bending section are provided separately in a pair of upper and lower press dies, the structure of the press dies becomes simpler and less likely to break, thus improving maintainability and extending the service life. become longer.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIGS. 1 and 2 show an embodiment of a hemming device according to the present invention.

The hemming device of the present invention has a preliminary bending section C that performs preliminary bending on a pair of upper press die A and lower press die B, and a main bending section D that completely bends the preliminary bending process on the downstream side. and a conveyance mechanism for conveying the workpiece E.

The press upper die A is a movable upper die that moves up and down, and the press lower die B is a fixed lower die. The preliminary bending part C is provided integrally with the press upper die A, for example.
A fixed tilt mold 1 that tilts at an angle of 30°, a movable tilt pad 3 that moves up and down and is provided on the lower press mold B via an elastic member (spring) 2, and a bending mold that is directly fixed to the upper surface of the lower press mold B. It consists of a blade 4 and an L-shaped fixed positioning protrusion 5. The main bending section D includes a movable horizontal pad 6 provided on the upper press die A via an elastic member (spring) 2, an upper hemming blade 7a directly fixed to the lower surface of the upper press die A, and a lower press die. It consists of a fixed horizontal die 8 integrally provided with the press lower die B, a lower hemming blade 7b directly fixed to the upper surface of the lower press die B, and a movable L-shaped positioning protrusion 9 provided with a cylinder P.

The conveyance mechanism includes a fixed horizontal conveyor 1 provided upstream of the lower press die B and consisting of a roller conveyor, for example.
0, and a dead weight transport mechanism F.
is a movable inclined conveyor 11 provided on the lower right side in the figure, which is composed of a roller conveyor similar to that described above, which is installed in the lower internal part of the movable inclined pad 3 so as to be movable up and down via a cylinder P, and a movable inclined conveyor 11 provided downstream of the lower press die B. It is composed of a movable inclined conveyor 12 having a gentle slope, which is also a roller conveyor and is installed in a fixed horizontal mold 8 on the side so as to be movable up and down via a cylinder P.

The hemming process of the workpiece E is first performed by raising the press upper mold B as shown in FIG. In this state, the movable inclined pad 3 on the upstream side is raised by the spring 2, while the movable horizontal pad 6 on the downstream side is also lowered by the spring 2.

Then, when the workpiece E on the fixed conveyor 10 that has been conveyed is picked up and the workpiece E is placed between the movable inclined pad 3 and the fixed inclined mold 1,
The workpiece E moves on an inclined surface on the movable inclined pad 3, and is received at a right angle part formed by a positioning protrusion 5 and a bending blade 4 on an extension of the inclined surface.
The workpiece E is positioned and fixed on the inclined surface of the inclined movable pad 3.

After positioning and fixing, when the press upper die A is lowered, the workpiece E fixed on the inclined surface of the inclined movable pad 3 is held between the inclined movable pad 3 and the fixed inclined die 1. Then, as it continues to descend while being held, the tip of the workpiece E to be held is regulated by the bending blade 4 and the acute right corner part of the fixed inclined die 1, and is bent at approximately 30 degrees, as shown in FIG. Preliminary bending is performed.

Next, when the press upper mold A is raised to the position shown in FIG. Stop at a position. In this state, a space is created between the movable inclined pad 3 and the fixed inclined mold 1 into which the workpiece E can be inserted.

At this point, the movable inclined conveyor 11 is raised by the cylinder P and stops slightly above the upper end of the positioning protrusion 5, and the workpiece E, which has been pre-bent and lowered, is tilted downward from the left side to the right side of the movable inclined conveyor 11. Due to its own weight, it is discharged onto the gentle slope of the movable slope conveyor 12, which is raised and stopped at the top by the cylinder P of the main bending and descending section D. Then, the workpiece E subjected to preliminary bending processing
The tip of the cylinder P is positioned by coming into contact with the positioning protrusion 9 which has been raised to the highest position.

Thereafter, the upstream movable inclined conveyor 11 and the downstream movable inclined conveyor 12 descend. Then, a new workpiece E is picked up from the fixed conveyor 10, and the movable inclined pad 3 and the fixed inclined mold 1 are moved.
The lowered member E is positioned and fixed on the inclined surface of the inclined movable pad 3 by inserting the lowered member E into the inclined surface of the inclined movable pad 3.

On the other hand, as the movable inclined conveyor 12 descends, the pre-bent workpiece E placed on the movable inclined conveyor 12 is positioned and fixed on the upper surface of the fixed horizontal mold 8 while being positioned on the positioning protrusion 9.

Next, as shown in FIG. 2, when the press upper die A is lowered, the workpiece E supplied to the pre-bending section C is moved to the movable inclined pad 3 and the fixed inclined die 1 which is inclined.
The tip of the workpiece E is held by the bending blades 4 and the positioning protrusion 5 and bent at approximately 30 degrees as described above. At the same time, the main bending part D
The workpiece E supplied to the machine is a horizontal type 8 whose main part is fixed.
The tip is held between the movable horizontal pads 6 and pre-machined at 30°, and is regulated by the positioning protrusion 9 and held between the lower hemming blade 7b and the upper hemming blade 7a, and the tip is completely bent.

Thereafter, as shown in FIG. The workpiece E that has arrived at the bending section C is transferred to the main bending section D.
To, the workpiece E placed on the fixed horizontal conveyor 10
are moved to the preliminary bending section C, and the above operations are repeated to sequentially perform hemming.

In this way, the hemming process can be carried out in mass production and efficiently.

According to the above-mentioned apparatus, since the preliminary bending section C and the main bending section D are provided in the pair of upper and lower press molds A and B, the entire apparatus can be made compact and does not require a large equipment area. Furthermore, since the bending process is performed using a two-stage method, the mechanism (structure) is simplified. As a result, maintainability is improved and lifespan is extended.

The preliminary bending part C in the above embodiment is the press upper mold A.
There is a fixed inclined mold 1 in the press mold 1, and a movable inclined pad 3 is provided in the lower press mold B, but they work in the same way even if these are reversed. Further, in the main bending section D, the movable horizontal pad 6 and the fixed horizontal mold 8 may be reversed in the same way. Even in that case, the movable inclined conveyor 1
1 and 12 are provided on the press lower die B.

[Effect of idea]

As described above, the present invention does not require a large facility area, has a simple structure, can reduce costs, has good maintainability, has a long life, and is efficient in mass production. It is something.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the hemming device of the present invention. Figure 1 is a cross-sectional view with the upper press mold raised, and Figure 2 is a cross-sectional view with the upper press mold lowered. FIG. A... Upper press die, B... Lower press die, C...
Preliminary bending section, D: main bending section, E: workpiece, F: dead weight transport mechanism.

Claims (1)

[Scope of utility model registration request] A pair of upper and lower press dies consisting of a fixed press lower die and a movable press upper die are provided with separate preliminary bending sections for performing preliminary bending and main bending sections for completely bending the preliminary bending. The parts are transported from the preliminary bending section to the main bending section,
The hemming processing device is also characterized in that it is equipped with a dead weight transport mechanism for transporting the material from the main bending section to the outside of the device.