JPH05253626A - Roll type hemming machine - Google Patents

Abstract

(57) [Summary] [Purpose] Preliminarily bends the flange of the outer panel. [Structure] The roller type hemming apparatus according to the present invention comprises:
A positioning mechanism for positioning the outer panel 4 on the lower die 12 is provided so that the outer surface 12a of the lower die 12 and the outer surface of the flange portion 4a of the outer panel 4 are aligned with each other. Further, a pre-hem roller 18 having a cylindrical rolling surface 18f that rolls the outer surface 12a of the lower die 12 and a conical rolling surface 18e that rolls the flange portion 4a in a direction for further pre-bending is provided. With this structure, when the prehem roller 18 pre-bends the flange portion 4a,
The prehem roller 18 moves following the outer surface 12 a of the lower mold 12. Therefore, even if the holding mechanism for holding the pre-hem roller 18 is bent or vibrated, the pre-hem roller 18 is not displaced inward of the lower mold 12 or in the vertical direction, and the pre-bending of the flange portion is favorably performed. ..

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller type hemming device for hemming a door panel of a vehicle.

[0002]

2. Description of the Related Art The prior art relating to this is disclosed in Japanese Patent Laid-Open No. 61-2.
No. 62432. Hereinafter, the prior art will be described with reference to FIGS. 3 and 4 attached to the application of the present application. According to this apparatus, as shown in FIG.
And the inner panel 6 is placed on the outer panel 4. And in this state, both panels 4,
Positioning and clamping mechanism 6 (not shown)
Position on the lower mold 2 by. Next, FIG. 3 (B)
As shown in, the prehem roller 8 having the conical surface 8a is moved in the direction perpendicular to the paper surface (Y-axis direction), and the flange portion 4a of the outer panel 4 is compressed by the conical surface 8a of the prehem roller 8. As a result, the flange portion 4a of the outer panel 4 is pre-bent from a substantially upright state to an oblique state. Further, the flange portion 4a of the outer panel 4 preliminarily bent is, as shown in FIG.
It is rolled by the cylindrical hem roller 10. Here, since the rolling surface 10a of the hem roller 10 is parallel to the surface of the lower mold 2, the flange portion 4a of the outer panel 4, the inner panel 6, and the outer panel 4 themselves are sandwiched between the hem roller 10 and the lower mold 2. The flange portion 4a is pressed in such a state that it is bent until it becomes parallel to the outer panel 4.

[0003]

However, according to the conventional roller type hemming apparatus, the outer panel 4 is not provided.
In the step of pre-bending the flange portion 4a of the above, the prehem roller 8 is in contact with only the flange portion 4a of the outer panel 4. Here, since the outer panel 4 is generally an easily bent iron plate, a support mechanism (not shown) for rotatably supporting the prehem roller 8 is provided.
If the pre-hem roller 8 bends or vibrates, the prehem roller 8 is slightly displaced in the X-axis direction (horizontal direction in the drawing) or in the Z-axis direction (vertical direction in the drawing). As a result, the flange portion 4a pre-bent by the prehem roller 8 may have a large waviness, or as shown in FIG. 4, the flange portion 4a may enter the inside of the lower mold 2 beyond the specified position. .. When the flange portion 4a of the outer panel 4 is rolled by the hem roller 10 in such a state, the machined surface is corrugated, and as shown in FIG. 4C, the outer shape line of the panel is inside the true size. A so-called sink state H occurs.

A technical problem of the present invention is that, while the prehem roller 8 is rolling the flange portion 4a of the outer panel 4, a part of the prehem roller 8 can roll the outer surface 2a of the lower mold 2 at the same time. By making a different structure,
The outer surface 2a of the lower die 2 regulates the movement of the prehem roller 8 in a direction other than a predetermined direction so that stable prehem processing (preliminary bending) can be performed.

[0005]

The above-mentioned problems can be solved by a roller type hemming device having the following respective structures. That is, the roller type hemming processing apparatus according to the present invention is such that the distance between the lower die for mounting the flanged panel and the outer surface of the lower die to the flange surface of the panel is constant, A pre-hem roller provided with a positioning mechanism for positioning the panel on the lower die, a lower die rolling surface for rolling the outer surface of the lower die, and a panel rolling surface for rolling the flange surface of the panel in a direction to be further bent at a predetermined angle. And have.

[0006]

According to the present invention, the prehem roller is provided with the lower die rolling surface for rolling the outer surface of the lower die in addition to the panel rolling surface for rolling the flange surface of the panel. Therefore, the pre-hem roller moves along the outer surface of the lower mold when rolling the flange surface of the panel. Here, since the lower die rolling surface and the pressing direction of the prehem roller are substantially perpendicular to each other, even if the support mechanism of the prehem roller bends or vibrates, this prehem roller is displaced in the inward direction of the lower die or in the vertical direction. There is nothing to do. As a result, it is possible to prevent waviness from occurring on the flange surface after being preliminarily bent and to prevent the flange surface from entering the inside of the specified position.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A roller type hemming apparatus according to an embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 shows a plan view (A) and a side view (B) of a prehem roller 18 used in a roller type hemming apparatus according to this embodiment. This pre-hem roller 18
It is provided with a cylindrical bearing portion 18a and a flange-shaped roller portion 18b fixed to the lower end of the bearing portion 18a with their axes aligned. Then, the bearing portion 18
A through hole 18c is formed from a to the roller portion 18b in the central axial direction (the vertical direction in FIG. 1B). The roller portion 18b has a circular plane shape, and the outer surface thereof has a conical rolling surface 1 as shown in FIG. 1 (B).
8e is formed. Furthermore, the conical rolling surface 18
Below e, a cylindrical compaction surface 18f is continuously formed with its axes aligned. Both rolling surfaces 18
The angle formed by e and 18f is set to 135 °. A shaft of a roller support mechanism (not shown) is inserted into the through hole 18c of the prehem roller 18, and the prehem roller 18 can rotate around this shaft. Further, the roller support mechanism is connected to a hand of a robot (not shown). As a result, when the robot is operated, the prehem roller 18 moves in the X-axis direction (the left-right direction in FIG. 1B), the Y-axis direction.
It is possible to move along a predetermined locus in the axial direction (the direction perpendicular to the paper surface in FIG. 1B) and the Z-axis direction (the vertical direction in FIG. 1B). The roller support mechanism is a mechanism that hydraulically controls the prehem roller 18 to obtain a predetermined pressing force within a constant stroke.

Next, the operation of the roller type hemming apparatus according to this embodiment will be described with reference to FIG. First, in the pre-process of performing the hemming process, the outer panel 4 is flanged. This flange stand process is shown in Fig. 2.
It is shown in (A). When the outer panel 4 is placed on the lower die 12, the outer panel 4 is pressed and positioned by the presser foot 3. Here, the presser foot 3
Is arranged such that the outer surface 3a thereof is located inside the outer surface 12a of the lower die 12 by the thickness of the outer panel 4, and the outer surface 3a of the presser foot 3 and the lower die 1 are arranged.
The outer surface 12a of the second mold 12 and the outer surface 12a of the second mold 12 are both formed so as to be perpendicular to the surface 12e of the lower mold 12. When the outer panel 4 is positioned by the presser foot 3, the cylindrical flange stand roller 1 is then moved in the Y-axis direction (perpendicular to the paper surface) while pressing the outer surface 12a of the lower die 12. It Here, as described above, since the outer side surface 3a of the presser foot 3 is located inside the outer side surface 12a of the lower die 12 by the thickness of the outer panel 4, the outer panel 4 is
The edge portion 4a is formed while being sandwiched between the flange stand roller 1 and the outer side surface 3a of the presser foot 3. After the flange is erected, the outer surface (flange surface) of the flange portion 4a formed on the outer panel 4 and the outer surface 1 of the lower die 12 are formed.
It is located in the same plane as 2a.

When the flange of the outer panel 4 is finished, the presser foot 3 is removed and the inner panel 6 is set on the outer panel 4. Both panels 4, 6 are then positioned on the lower die 12 by a positioning and clamping mechanism (not shown). When the positioning of both panels 4 and 6 is completed, next, as shown in FIG.
As shown in FIG. 5, the prehem roller 18 preliminarily bends the flange portion 4 a of the outer panel 4. Here, on the outer surface 12a of the lower mold 12, the pre-hem roller 1
The cylindrical rolling surface 18f of 8 contacts. At this time, from the upper end of the cylindrical compaction surface 18f to the surface 12 of the lower mold 12.
The distance to e is set to the length M in consideration of the plate thicknesses of the outer panel 4 and the inner panel 6. Further, the length N by which the rolling surface 18f contacts the outer surface 12a of the lower die 12 is set to 10 mm or more. The pre-hem roller 1
8 is the outer surface 1 of the lower mold 12 whose cylindrical rolling surface 18f is
The robot is moved in the Y-axis direction (perpendicular to the paper surface) while pressing 2a. As a result, the flange portion 4a of the outer panel 4 is compacted by the conical compaction surface 18e of the prehem roller 18 and is about 45 ° from the flanged state (dotted line portion).
Can be folded. Here, as described above, when the prehem roller 18 is moved in the Y-axis direction by the robot, the cylindrical rolling surface 18f thereof has the outer surface 12 of the lower die 12.
a is being compacted. Therefore, even when the support mechanism of the prehem roller 18 or the arm of the robot bends or vibrates, the prehem roller 18 moves in the inner direction (X) of the lower mold 12.
It is not displaced in the axial direction) or in the vertical direction (Z-axis direction). As a result, waviness does not occur in the flange portion 4a after being preliminarily bent, and the flange portion 4a does not enter the inside of the prescribed position, and preliminary bending is favorably performed.

When the pre-bending of the flange portion 4a of the outer panel 4 is completed, the flange portion 4a is compressed by the columnar hem roller 10 as shown in FIG. Thereby, the flange portion 4
The a is bent until it becomes parallel to the inner panel 6 and the outer panel 4, and the hemming process is completed.

[0011]

According to the present invention, when the prehem roller preliminarily bends the flange portion of the panel, the prehem roller moves following the outer surface of the lower mold, so that the support mechanism of the prehem roller bends or vibrates. However, the prehem roller does not move inward or vertically of the lower mold. As a result, waving of the pre-bent flange portion and intrusion of the flange portion into the inside of the prescribed position are prevented, and the hemming is favorably performed.

[Brief description of drawings]

FIG. 1 is a plan view (A) and a side view (B) of a prehem roller used in a roller type hemming apparatus according to this embodiment.

FIG. 2 is a side view showing how hemming is performed using the roller type hemming apparatus according to the present embodiment.

FIG. 3 is a side view showing how hemming is performed using a conventional roller type hemming apparatus.

FIG. 4 is a side view showing how hemming is performed using a conventional roller type hemming device.

[Explanation of symbols]

 4 Outer panel 4a Flange part 6 Inner panel 12 Lower mold 12a Lower mold outer surface 18 Prehem roller 18e Conical rolling surface (panel rolling surface) 18f Columnar rolling surface (lower rolling surface)

Claims (1)

[Claims] 1. A lower mold for mounting a flanged panel, and positioning the panel on the lower mold so that the distance from the outer surface of the lower mold to the flange surface of the panel is constant. A pre-hem roller provided with a positioning mechanism, a lower die rolling surface that rolls the outer surface of the lower die, and a panel rolling surface that rolls the flange surface of the panel in a direction in which the flange surface is further bent at a predetermined angle. Roller type hemming device.