JP2022052520A - Roller hemming device - Google Patents

Abstract

To provide a roller hemming device which makes portion, where the appearance quality is deteriorated, such as surface distortion, less likely to occur in a panel member after hemming.SOLUTION: Hemming restriction mechanisms 10 are provided at positions, where surface distortion etc. is likely to occur during normal hemming, on a moving path of a bending roller 6. The hemming restriction mechanism 10 is provided with a restriction surface 11. The restriction surface 11 contacts with the bending roller 6 when a peripheral edge part 4 of a folded first panel member 2 is pressed to restrict pressing deformation caused by the bending roller 6. The hemming restriction mechanism 10 is moved by a moving mechanism 21 so as to retreat from the moving path of the bending roller 6.SELECTED DRAWING: Figure 2

Description

In the present invention, a roller hem processing device, in particular, two panel members are placed so as to be overlapped on the lower mold, and the peripheral edge portion of the lower panel member is pressed by a bending roller to be placed on the peripheral edge portion of the upper panel member. It relates to a roller hem processing device that folds back into a hemming process.

In such a roller hem processing device, the first panel member and the second panel member are superposed on the lower mold in this order, and the peripheral edge portion of the first panel member that has been bent upward substantially vertically in advance is placed on the second panel member side. The bending roller is moved while being pressed by the bending roller, and the peripheral portion of the first panel member is folded back so as to wrap the peripheral edge portion of the second panel member for hemming processing. For pressing by the bending roller, for example, a pressing means such as a spring, an hydraulic / pneumatic cylinder, or a servomotor is used.

In roller hem processing used for manufacturing a body of a mass-produced vehicle, for example, as described in Patent Document 1 below, a bending roller is often attached to a manipulator of an industrial robot. The industrial robot can freely move the manipulator within the movable range, and the bending roller attached to the manipulator is also freely moved by so-called teaching. By freely using the bending roller in this way, various hemming processes can be performed in a short time. Prior to the so-called main bending process in which the peripheral edge portion of the first panel member is pressed against the peripheral edge portion of the second panel member, the peripheral edge portion of the first panel member is bent to the peripheral edge portion side of the second panel member. Preliminary bending is performed by folding back at an angle. In a roller hem processing device using an industrial robot, pre-bending and main bending are often performed by one device.

Japanese Unexamined Patent Publication No. 5-305357

However, the body panel members themselves that are hemmed are also diversifying. The hemming part of the car body panel member is, for example, pre-drilled, the plate thickness of the sandwiched panel member is not uniform, the members are not in contact with each other, and there is a gap between the panel members. There is a place where there is. In such a place, if hemming processing is performed normally, surface distortion or the like may occur in the panel member, particularly the outer panel member of the vehicle body, and the appearance quality may be deteriorated after the processing. Further, in general, it is difficult to perform hemming processing in which a panel member made of fragile resin or the like is sandwiched between metal panel members.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a roller hem processing apparatus in which appearance quality deterioration points such as surface distortion are less likely to occur in a panel member after hemming processing.

In order to achieve the above object, the roller hem processing apparatus of the present invention is used.
With the first panel member and the second panel member placed in this order on the lower mold, the peripheral edge of the first panel member is pressed and deformed by the bending roller, and the bending roller is moved while being folded back toward the second panel member. In a roller hem processing apparatus that performs hemming processing so as to wrap the peripheral edge portion of the second panel member with the peripheral edge portion of the first panel member.
It is characterized by having a hemming regulating mechanism provided with a regulating surface that is abutted against the bending roller during the hemming process and regulates the amount of pressing deformation by the bending roller.

According to this configuration, the amount of deformation due to pressing of the peripheral edge of the first panel member by the bending roller is restricted at the place where the restricted surface of the hemming regulation mechanism is in contact, that is, the amount of deformation due to pressing is suppressed, which is usually the case. With the amount of pressing deformation of, it is possible to suppress this at a place where surface distortion or the like may occur. Therefore, by providing a hemming control mechanism at the required location of the movement path of the bending roller and regulating the amount of pressing deformation of the peripheral edge of the first panel member at that location, the occurrence of appearance quality deterioration such as surface distortion is reduced. can do.

Further, in another configuration of the present invention, the location where the hemming control mechanism is provided is a position where the peripheral portion of the first panel member is folded back and the thickness of the peripheral portion of the second panel member changes. It is characterized in that it is a position where a hole is formed in the peripheral edge portion of the member, or a position where a gap exists between the peripheral edge portion of the second panel member and the peripheral edge portion of the first panel member surrounding the peripheral portion.

According to this configuration, among the peripheral edges of the second panel member in which the peripheral edge portion of the first panel member is folded back, a position where the thickness of the peripheral edge portion changes, where surface distortion or the like is likely to occur in normal hemming processing. Appearance quality deterioration such as surface distortion is deteriorated by arranging the hemming control mechanism at any or all of the positions where the holes are machined and the positions where the gap exists between the peripheral portion of the first panel member. It is possible to accurately reduce the occurrence of locations.

A further configuration of the present invention is characterized in that the hemming restricting mechanism includes a moving mechanism that moves the restricting surface to a retracted position where it does not abut on the bending roller.

According to this configuration, in the preliminary bending process before the main bending process, the bending rollers are arranged so that the pressing surface (outer peripheral surface) of the bending roller is slanted with respect to the peripheral edge portion of the second panel member. Therefore, the axial end portion of the bending roller may protrude downward from the peripheral edge portion of the first panel member, and the protruding portion may interfere with the regulation surface of the hemming regulation mechanism. As described above, when the bending roller and the hemming regulating mechanism interfere with each other during the preliminary bending process, the interference between the two can be avoided by moving the regulating surface to the retracted position by the moving mechanism.

A further configuration of the present invention is characterized in that the hemming regulating mechanism is configured so that the contact position of the regulating surface with the bending roller can be shim-adjustable.

According to this configuration, by making the position of the regulation surface shim adjustable, it is possible to finely adjust the amount of pressing deformation of the peripheral edge portion of the first panel member and effectively reduce the occurrence of surface distortion and the like.

As described above, according to the present invention, by regulating the amount of pressing deformation of the peripheral portion of the panel member by the bending roller at the place where surface distortion is likely to occur during hemming processing, the appearance quality deterioration part such as surface distortion is deteriorated. Can be reduced, thereby ensuring the commercial value of the vehicle. Further, hemming processing is possible in which a fragile second panel member such as a resin panel member is wrapped with a metal first panel member.

It is a front view which shows the schematic structure of one Embodiment of the roller hem processing apparatus of this invention. It is a front view of the hemming regulation mechanism provided in the roller hem processing apparatus of FIG. It is a detailed view of the main part of the hemming regulation mechanism of FIG. It is explanatory drawing of the preliminary bending process.

Hereinafter, an embodiment of the roller hem processing apparatus of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view showing a schematic configuration of the roller hem processing apparatus of this embodiment. In the roller hem processing apparatus of this embodiment, the first panel member 2 and the second panel member 3 are placed in this order on the lower mold 1, and the first panel member 2 and the second panel member 3 are placed in this order in this order. The peripheral edge portion (hereinafter referred to as the first panel peripheral edge portion) 4 of the first panel member 2 bent substantially vertically is folded back onto the peripheral edge portion (hereinafter referred to as the second panel peripheral edge portion) 5 of the second panel member 3, and the first panel is formed. Hemming is performed so that the peripheral edge portion 4 wraps the peripheral edge portion 5 of the second panel. The figure is shown very schematically, and the actual shapes of the lower mold 1, the first panel member 2, and the second panel member 3 are completely different. Further, in general, the first panel member 2 is the outer panel member of the vehicle body.

The hemming process of the peripheral portion 4 of the first panel is performed by pressing with the bending roller 6. The bending roller 6 of this embodiment is made of a solid cylinder, and its outer peripheral surface is a pressing surface of the first panel peripheral edge portion 4. The bending roller 6 is rotatably supported by a manipulator 8 of a multi-axis industrial robot (hereinafter, robot) 7. As described above, the robot 7 can move the manipulator 8 to a free position, a free direction, and a free direction within the movable range, and therefore, the bending roller 6 attached to the manipulator 8 can be moved. By so-called teaching, the robot is moved in a free posture, in a free direction, and in a free position. The operation of the robot 7 is controlled by a controller (not shown). The robot 7 itself may be mounted on a moving device so that it can move along the floor surface, for example.

The bending roller 6 of this embodiment is attached to the manipulator 8 of the robot 7 via the pressing device 9. In this embodiment, the bending roller 6 is configured to press the first panel peripheral edge portion 4 with a desired pressing force by a spring or the like (not shown) provided in the pressing device 9. The hemming process in which the first panel peripheral edge portion 4 is subjected to the main bending process on the second panel peripheral edge portion 5 by this pressing force is defined as a normal hemming process. As described above, as the pressing means for pressing the bending roller 6, for example, an hydraulic / pneumatic cylinder or a servomotor can be applied.

FIG. 2 is a configuration diagram of a hemming control mechanism 10 provided in the roller hem processing device of FIG. 1. The roller hem processing device of this embodiment is provided with the hemming control mechanism 10 shown in FIG. 2 at a plurality of locations. There is. Although the hemming control mechanism 10 is slightly different depending on the arrangement location, the outline of the configuration is the same as that in FIG. The hemming regulating mechanism 10 regulates the amount of pressing deformation of the first panel peripheral edge portion 4 by the bending roller 6 by abutting the regulating surface 11 on the outer peripheral surface of the bending roller 6, that is, the pressing surface during the main bending process of the hemming process. It is something to do. Therefore, the hemming regulating mechanism 10 (regulating surface 11) is arranged along the moving path of the bending roller 6 by the robot 7.

The hemming control mechanism 10 is, for example, a position where a hole is previously formed in the second panel peripheral edge 5 where the first panel peripheral edge 4 is folded back, a position where the plate thickness of the second panel peripheral edge 5 changes, and a hemming. After processing, it is provided at one or more positions where a gap exists between the peripheral portion 4 of the first panel and the peripheral portion 5 of the second panel. These portions are locations where surface distortion or the like is likely to occur in the first panel member 2, that is, the outer panel member of the vehicle body by normal hemming processing. Further, as a place where surface distortion or the like is likely to occur in the first panel member 2 after hemming processing, the first panel peripheral edge portion 4 (the second panel peripheral edge portion 5 also has the same shape) itself is continuously curved in the panel member plate surface. It is also provided in the place where it is.

FIG. 3 is a detailed view of the main part of the hemming regulation mechanism 10 of FIG. FIG. 3 shows a place where a gap exists between the first panel peripheral part 4 and the second panel peripheral part 5 as an example of the place where the hemming control mechanism 10 is provided. The regulating member 12 that abuts on the outer peripheral surface of the bending roller 6 and constitutes the regulating surface 11 is mounted on the rotary support base 13 via a shim 14. That is, the shim 14 laid under the regulating member 12 is interposed so as to be sandwiched between the rotation support base 13. Similar to the existing shim, this shim 14 is for finely adjusting the position of the regulation surface 11 of the regulation member 12 by changing its own thickness, and has several kinds of thicknesses other than those shown in the figure. There is a shim. The height of the rotation support base 13 with respect to the lower mold 1 is the reference piece 15 provided on the lower mold 1 side (bracket 17) and the height provided on the rotation support base 13 side so as to be in contact with the upper surface thereof. Although defined by the contact piece 16, the height of the regulation surface 11 with respect to the lower mold 1, that is, the position of the regulation surface 11 where surface distortion does not occur in the first panel member 2 needs to be finely adjusted. Therefore, a shim 14 is interposed between the regulating member 12 and the rotary support base 13 so that the position of the regulating surface 11 can be shim-adjusted.

The regulating member 12 (regulating surface 11) and the rotary support base 13 constituting the hemming regulating mechanism 10 can be retracted from the retracting position where the moving mechanism 21 does not abut on the bending roller 6, that is, the moving path of the bending roller 6. Will be moved. The rotation support base 13 is rotatably attached to a bracket 17 provided on the lower mold 1 below the movement path of the bending roller 6 via a rotation shaft 18 extending in a substantially horizontal direction. Further, an air cylinder 19 that expands and contracts in a substantially vertical direction is attached to the bracket 17, and the tip end portion of the cylinder rod 20 of the air cylinder 19 is rotatable to the opposite portion of the rotary support base 13 with the rotary shaft 18 interposed therebetween. Is linked to. For example, the solid line in FIG. 2 shows a state in which the cylinder rod 20 is stretched. When the cylinder rod 20 is shortened from this state, the rotary support base 13 rotates around the rotary shaft 18, and the rotary support base 13 and the regulating member 12 are moved to the positions of the two-dot chain line in the figure. That is, the regulating member 12 and the rotation support base 13 constituting the hemming regulating mechanism 10 are retracted from the moving path of the bending roller 6.

In the roller hem processing apparatus of this embodiment, the preliminary bending process of the peripheral portion 4 of the first panel is performed prior to the main bending process. In the preliminary bending process, for example, as shown in FIG. 4, the bending roller 6 is used by tilting the bending roller 6 so that the outer peripheral surface (pressing surface) of the bending roller 6 is slanted with respect to the peripheral portion 5 of the second panel. The axial end portion of No. 6 projects below the peripheral portion 4 of the first panel. Therefore, for example, if the regulating member 12 (regulating surface 11) is present at the position shown in FIG. 3, it interferes with the downwardly protruding portion of the bending roller 6. Therefore, in this embodiment, the regulating member 12 (regulating surface 11) is retracted from the moving path of the bending roller 6 by the moving mechanism 21 provided in the hemming regulating mechanism 10, whereby the regulating surface 11 is brought into contact with the bending roller 6. It was made possible to avoid interference with the bending roller 6 during the preliminary bending process by moving to a retracted position where it does not touch.

When the second panel peripheral edge 5 where the first panel peripheral edge 4 is folded back by the hemming process is preliminarily drilled, burrs and burrs generated around the hole are sandwiched and the normal hemming process is performed. Then, surface distortion or the like occurs in the first panel member 2. Further, when the plate thickness of the second panel peripheral portion 5 on which the first panel peripheral portion 4 is folded back changes, for example, it is caused by the first panel peripheral portion 4 which becomes a surplus on the side where the plate thickness of the second panel peripheral portion 5 is small. As a result, surface distortion or the like occurs in the first panel member 2. Further, when there is a gap between the folded first panel peripheral edge portion 4 and the second panel peripheral edge portion 5, the surface of the first panel member 2 is caused by the elastic deformation of the first panel peripheral edge portion 4 before and after pressing. Distortion occurs. Further, even in the place where the first panel peripheral edge portion 4 and the second panel peripheral edge portion 5 are continuously curved in the plate surface, the folded first panel peripheral edge portion 4 becomes a surplus and becomes the first panel member 2. Surface distortion occurs. As described above, the normal hemming process in this embodiment is a pressing process in which the first panel peripheral edge portion 4 is crushed onto the second panel peripheral edge portion 5 by a predetermined pressing force by the spring which is the pressing means. Point to.

In such a place, the occurrence of surface strain and the like can be reduced by slightly reducing the amount of pressing deformation of the peripheral edge portion 4 of the first panel during the main bending process in the hemming process. The hemming process has the meaning of sandwiching the second panel peripheral portion 5 with the folded first panel peripheral edge portion 4, but it is not necessary to sandwich the second panel member 3 at all the peripheral edges. Therefore, even if the amount of pressing deformation of the peripheral portion 4 of the first panel is locally reduced in a place where surface distortion or the like is likely to occur as described above, it is unlikely that the second panel member 3 will be hindered from being pinched. It is possible to secure the commercial value by eliminating the parts where the appearance quality is deteriorated such as the surface distortion of the first panel member 2 which is the outer panel member.

An attempt was made to adjust the amount of pressing deformation of the peripheral portion 4 of the first panel by teaching the robot 7. The manipulator 8 of the robot 7 can accurately trace the taught movement trajectory, but only the teaching of the robot 7 is due to the dimensional accuracy of the panel member by the press molding in the previous process and the minute adjustment of the actual pressing deformation amount. It was not possible to reduce the occurrence of surface distortion.

As described above, in the roller hem processing apparatus of this embodiment, the amount of pressing deformation of the peripheral portion 4 of the first panel by the bending roller 6 is restricted, that is, pressed at the position where the restricted surface 11 of the hemming restricting mechanism 10 abuts. The amount of deformation due to the above is suppressed, which makes it possible to suppress the amount of deformation due to the normal pressure deformation at a place where surface distortion or the like may occur. Therefore, by providing the hemming restricting mechanism 10 at a necessary portion of the movement path of the bending roller 6 and restricting the amount of pressing deformation of the peripheral portion 4 of the first panel at that location, the appearance quality deterioration portion such as surface distortion is generated. Can be reduced. Further, hemming processing is also possible in which a fragile second panel member 3 such as a resin panel member is sandwiched between metal first panel members 2.

Further, in the second panel peripheral edge portion 5 where the first panel peripheral edge portion 4 is folded back, a position where the thickness of the peripheral edge portion 5 changes, a position where a hole is formed, and a position between the first panel peripheral edge portion 4 and the peripheral portion 5 are formed. At positions where voids exist, surface distortion and the like are likely to occur during normal hemming processing. Therefore, by disposing the hemming control mechanism 10 at one or more of these positions, appearance quality deterioration such as surface distortion can be caused. Occurrence can be reduced.

Further, when the bending roller 6 and the hemming regulating mechanism 10 interfere with each other during the preliminary bending before the main bending, the regulating surface 11 is moved to the retracted position by the moving mechanism 21 to avoid the interference between the two. Can be done.

Further, by making the position of the regulation surface 11 adjustable by the shim 14, it is possible to finely adjust the amount of pressing deformation of the peripheral portion 4 of the first panel and effectively reduce the occurrence of surface distortion and the like.

Although the roller hem processing apparatus according to the embodiment has been described above, the present invention is not limited to the configuration described in the above embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, in the above embodiment, the regulation surface 11 of the hemming regulation mechanism 10 is configured to abut on the outer peripheral surface of the bending roller 6, that is, the pressing surface of the bending roller 6, but the regulation surface 11 abuts on the bending roller 6. It can be anywhere as long as it is part of.

Further, in the above embodiment, for example, during preliminary bending in hemming, the hemming regulating mechanism 10 is moved by an air cylinder 19 so that the regulating surface 11 is moved to a retracted position where it does not abut on the bending roller 6. However, the moving mechanism 21 is not limited to this. For example, since the bending roller 6 is moved together with the manipulator 8 of the robot 7, when the manipulator 8 approaches, the hemming restricting mechanism 10 is moved so as to be retracted from the moving path of the bending roller 6. It is also possible to configure it.

1 Lower mold 2 1st panel member 3 2nd panel member 4 1st panel peripheral part (peripheral part of 1st panel member)
5 Peripheral part of the second panel (peripheral part of the second panel member)
6 Bending roller 10 Hemming regulation mechanism 11 Regulation surface 14 Sim 21 Movement mechanism

Claims (4)

With the first panel member and the second panel member placed in this order on the lower mold, the peripheral edge of the first panel member is pressed and deformed by the bending roller, and the bending roller is moved while being folded back toward the second panel member. In a roller hem processing apparatus that performs hemming processing so as to wrap the peripheral edge portion of the second panel member with the peripheral edge portion of the first panel member.
A roller hem processing apparatus comprising a hemming regulating mechanism having a regulating surface that is abutted against the bending roller during hemming processing and regulates the amount of pressing deformation by the bending roller. The location where the hemming control mechanism is provided is such that the peripheral edge of the first panel member is folded back at a position where the thickness of the peripheral edge of the second panel member changes, and the peripheral edge of the second panel member is drilled. The roller hem processing apparatus according to claim 1, wherein the position is a position where a gap exists between the peripheral portion of the second panel member and the peripheral edge portion of the first panel member surrounding the peripheral portion. The roller hem processing apparatus according to claim 1 or 2, wherein the hemming regulating mechanism includes a moving mechanism for moving the regulating surface to a retracted position where the regulating surface does not abut on the bending roller. The roller hem processing apparatus according to any one of claims 1 to 3, wherein the hemming regulating mechanism is configured so that the contact position of the regulating surface with the bending roller can be shim-adjustable.

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