JP2561596Y2 - Hemming device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hemming apparatus for bending an edge of a sheet metal.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional hemming apparatus for bending an edge of a sheet metal includes a lower mold 1, a positioning jig 2 for pressing and fixing the sheet metal on the lower mold 1, and a lower jig. A robot 3 moving on a guide rail 4 laid on the floor beside the mold 1, and a hemming roller 6 rotatably supported by a support member 7 provided on a wrist 5 a at the tip of an arm 5 of the robot 3. It is composed of

Then, as shown in FIG. 7, a lower sheet metal 8a and an upper sheet metal 9a are positioned on the lower die 1 by being overlapped with each other, and an edge 8b of the lower sheet metal 8a is preliminarily adjusted by about 45 degrees by a hemming roller 6. The bending is performed, and the main bending is performed so that the edge 8b of the lower sheet metal 8a overlaps the edge 9b of the upper sheet metal 9a.

[0004]

In the above-mentioned conventional hemming processing apparatus, since the pressing force of the hemming is only the thrust of the robot, the pressing force may be insufficient and the bending may not be sufficiently performed.

An object of the present invention is to provide a hemming device which solves the above-mentioned conventional problems.

[0006]

The gist of the present invention for achieving the above object is to provide a support member fixed to a robot arm and a slide shaft slidably guided and supported by the support member. A slider, a cylinder fixed to the support member in an axial direction parallel to the slide shaft and coupled to the slider, a hemming roller made of a gel material rotatably supported on the slider, and a support member. A guide roller axially supported opposite to the hemming roller with a rotation axis parallel to the rotation axis of the hemming roller;
The lower die is provided with a guide rail for preliminary bending and a guide rail for main bending for guiding the guide rollers.

[0007]

According to the above construction, the hemming force increases the bending force due to the clamping force between the hemming roller, to which the thrust of the cylinder is applied, and the guide roller guided by the lower guide rail, thereby ensuring the hemming. It performs a processing action. In addition, a hemming roller made of a gel-like material
Processing corresponding to concave and convex hemming shapes can be performed.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a lower mold, 2 is a positioning jig for pressing and fixing a sheet metal on the lower mold 1, 3 is a robot moving on a guide rail 4 laid on the floor beside the lower mold 1, 7 Is a support member 7 provided on the wrist 5a at the tip of the arm 5 of the robot 3.

As shown in FIG. 2, a guide cylinder 10 is fixed to the support member 7, and a slide shaft 11 is slidably guided and supported by the guide cylinder 10. A slider 12 is fixed to the slide shaft 11.

The support member 7 has the slide shaft 1
A cylinder 13 is fixedly mounted in the axial direction parallel to 1 and is connected to the slider 12.

A hemming roller 14 made of a gel material is rotatably supported on the slider 12, and a guide roller 15 is supported on the supporting member 7 by a rotation axis parallel to the rotation axis of the hemming roller 14. And are pivotally supported.

Further, the lower roller 1 has the guide roller 15
And a guide rail 16a for preliminary bending and a guide rail 16b for main bending. The pre-bending guide rail 16a and the main bending guide rail 16b extend in a direction in which the robot 3 moves on the floor along the guide rail 4, have an angled edge, and have the pre-bending guide rail 16a. Has a downward inclination angle of 45 degrees, and the main bending guide rail 16b is installed vertically downward.

Therefore, the guide roller 15 is provided with a V-shaped groove so as to correspond to the mountain-shaped preliminary bending guide rail 16a and the main bending guide rail 16b.

Since the present invention has the structure as described above, as shown in FIG. 2, the guide roller 15 is engaged with the guide rail 16a for preliminary bending of the lower die 1, and the hemming roller 14 is placed on the lower die 1. The set lower sheet metal 8a is positioned at an inclination angle of 45 degrees with respect to the edge 8b bent at 90 degrees (the 90 degree bending of the edge 8b is formed at the time of press working in the previous process).

When the cylinder 13 is moved backward in this state, the hemming roller 14 moves in a direction approaching the guide roller 15 via the slider 12, and the lower sheet metal 8a 9 moves.
The edge 8b bent at 0 degree is preliminarily bent at 45 degrees.

Next, as shown in FIG. 3, the guide roller 15 is engaged with the main bending guide rail 16b. Thus, the hemming roller 15 is positioned in the horizontal direction, and the edge 8b of the lower sheet metal 8a preliminarily bent at 45 degrees by the retreat operation of the cylinder 13 is bent onto the edge 9b of the upper sheet metal 9a to be in a sandwiching state. This bending is performed.

Therefore, in the present invention, in both the preliminary bending and the main bending, the pressing force of the hemming roller 15 is large because the thrust of the cylinder 13 and the clamping force between the guide roller 15 that receives the thrust act as the bending force. The bending force of the edge 8b is obtained.

Further, since the hemming roller 14 is formed of a gel-like material, the hemming roller 14 has a convex shape as shown in FIG. 4 or a concave shape as shown in FIG. Performs hemming processing by following and deforming the shape.

[0019]

As described above, according to the present invention, the slider is slidably guided and supported on the support member fixed to the robot arm via the slide shaft, and the support member is fixed in the axial direction parallel to the slide shaft. A hemming roller made of a gel material is rotatably supported by the slider, and a guide roller is provided on the support member by a rotation axis parallel to the rotation axis of the hemming roller. And a guide rail for preliminary bending and a guide rail for main bending that guide the guide roller to the lower die, so that the hemming force by the hemming roller is the thrust of the cylinder and the hemming roller. It becomes a large acting force of the clamping force with the guide roller,
A reliable hemming process can be obtained.

Further, since the guide roller is engaged with the guide rail for preliminary bending and the guide rail for final bending to perform the preliminary bending of the hemming roller and the angular positioning of the final bending, the edge of the sheet metal is subjected to the preliminary bending and the final bending. The angle can be obtained easily and accurately.

Further, since the hemming roller is formed of a gel-like material, the hemming roller can follow the shape and perform the hemming process even if the hemming shape is convex or concave. In addition, there is an advantage that the operation of replacing the hemming roller with a special roller having an uneven shape is omitted.

[Brief description of the drawings]

FIG. 1 is an overall view of the device of the present invention.

FIG. 2 is a sectional view of a main part in a pre-bending state by the device of the present invention.

FIG. 3 is a cross-sectional view of a main part in a final bending state by the device of the present invention.

FIG. 4 is a sectional view of an uneven hemming state by the device of the present invention.

FIG. 5 is a cross-sectional view of an uneven hemming state by the device of the present invention.

FIG. 6 is an overall view of a conventional apparatus.

FIG. 7 is a sectional view of a pre-bending state and a main bending state by a conventional apparatus.

[Explanation of symbols]

 Reference Signs List 1 lower die 2 positioning jig 3 robot 5 arm 7 support member 11 slide shaft 12 slider 13 cylinder 14 hemming roller 15 guide roller 16a preliminary bending guide rail 16b main bending guide rail

Claims (1)

(57) [Scope of request for utility model registration] 1. A support member fixed to a robot arm,
A slider fixed to a slide shaft slidably guided and supported by the support member, a cylinder fixed to the support member in an axial direction parallel to the slide shaft and coupled to the slider, and rotatable to the slider A hemming roller made of a gel-like material rotatably supported on the guide member, a guide roller rotatably supported on the supporting member by a rotation axis parallel to the rotation axis of the hemming roller, and a guide that guides the guide roller to a lower mold. A hemming device comprising a guide rail for preliminary bending and a guide rail for final bending.