JP2008272791A - Hemming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hemming apparatus for positioning the inner panel on the outer panel and then for hemming the flange portion of the outer panel to the edge portion of the inner panel by means of a hemming blade, which hemming apparatus can cope with the positioning and the clamping of the inner panel irrespective of the shape of the inner panel, and has high versatility, and can suppress an apparatus cost. <P>SOLUTION: The hemming apparatus comprises a pressure pad 4 for positioning the inner panel W2 on the outer panel W1, and also for fixing the position of the inner panel W2 by pressing the inner panel W2. The pressure pad 4 has reference pins 17 formed so as to be inserted into positioning reference holes h formed on the inner panel W2, and pushing means 14 for clamping the inner panel W2 in the state that the reference pins 17 have been inserted into the reference holes h. The reference pins 17 and the pushing means 14 are provided so as to move at least in a specified direction respectively. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hemming device that hemmes and presses a flange portion of an outer panel placed on a lower mold to an end edge portion of an inner panel with a hem blade, and in particular, the inner panel is easily positioned regardless of the shape of the inner panel. It is related with the hemming apparatus which can be used.

  In the automobile manufacturing process, lids such as hoods, luggages, doors, etc. are composed of an outer panel and an inner panel that are bonded together and assembled together, and they are bent inwardly at the edge of the outer panel. Hemming press processing is performed to sandwich the parts.

Conventionally, a hemming apparatus is used for the hemming press processing. The hemming press process by the conventional hemming apparatus is demonstrated using FIG.
As shown in FIG. 6, a conventional hemming device 50 is provided at a lower mold 51 on which an outer panel W1 as a work is placed, and an upper end portion of the lower mold 51, and is used for positioning the outer panel W1. The locator 52 is provided, and by aligning the end of the outer panel W1 with the locator 52, the outer panel W1 can be aligned.

In addition, the inner panel W2, which is a workpiece, is placed on the outer panel W1 in a state where the outer panel W1 is aligned. The inner panel W2 is positioned so as to press the inner panel W2 against the outer panel W1. Performed by the pad 60.
That is, the pressure pad 60 is provided with a pressing pin 62 for pressing the inner panel W2 on the lower side (back side) of the plate-like frame 61, and further has a reference pin 63 for aligning the inner panel W2. Projecting downward. A reference hole h corresponding to the reference pin 63 is formed in the inner panel W2.
Therefore, the alignment of the inner panel W2 is performed by inserting the reference pin 62 of the pressure pad 60 shown in FIG. 6A into the reference hole h of the inner panel W2 as shown in FIG. This can be done easily by moving it to a predetermined position.

When the outer panel W1 and the inner panel W2 are aligned, and the panels W1 and W2 are fixed by the pressure pad 60, the hem blade 53 descends as shown in FIG. The end edge of the outer panel W1 is pressed and bent (hemming press), and the end edge of the inner panel W2 is sandwiched by the end edge of the outer panel W1.
Note that hemming apparatuses that perform hemming press processing are disclosed in Patent Documents 1 and 2.
Japanese Patent Laid-Open No. 7-232220 JP 2003-31348 A

Incidentally, in the hemming device 50 shown in FIG. 6, the inner panel W2 bonded to the outer panel W1 differs in the position of the reference hole h and the formation position of the flat surface depending on the vehicle type. For this reason, in the pressure pad 60 of the hemming device 50, it is necessary to provide the pressing pin 62 and the reference pin 63 in accordance with the shape of the inner panel W2 which is different for each vehicle type.
That is, since the pressure pad 60 needs to be prepared for each vehicle type, there is a problem that the versatility is low and the cost of the apparatus increases.

  The present invention has been made under the circumstances as described above, and aligns the inner panel with the outer panel, and hemming the hemming press of the flange portion of the outer panel to the edge of the inner panel with a hem blade. Therefore, it is an object of the present invention to provide a hemming device that can cope with the positioning and pressing of the inner panel regardless of the shape of the inner panel, has high versatility, and can reduce the cost of the device. And

In order to solve the above-described problem, the hemming device according to the present invention includes an outer panel placed on a lower mold, an inner panel placed on the outer panel, and a flange portion of the outer panel connected to an edge of the inner panel. In the hemming device that hemmes and presses with a hem blade, the inner panel is positioned with respect to the outer panel, and a pressure pad that fixes the inner panel by pressing is provided, and the pressure pad is formed on the inner panel. A reference pin formed so as to be insertable into a reference hole for alignment; and a pressing means for pressing the inner panel in a state where the reference pin is inserted into the reference hole, and the reference pin and the pressing means Each is characterized in that it is provided to be movable in at least one predetermined direction.
The reference pin is preferably provided so as to be movable in a two-dimensional axial direction perpendicular to the insertion direction into the reference hole.

With this configuration, even if the position of the reference hole in the inner panel differs depending on the vehicle type, it can be easily handled by moving and adjusting the position of the reference pin in the pressure pad.
Therefore, the pressure pad included in the hemming device according to the present invention can be used for a different inner panel for each vehicle type, and the cost for the device can be reduced.

Preferably, the pressing means has a rubber balloon body having an elastic repulsive force by being supplied with air and expanding, and pressing the inner panel by the elastic repulsive force of the rubber balloon body in an expanded state. .
The pressure pad is provided in a donut shape around the reference pin, and has a rubber tube body that has an elastic repulsion force when supplied with air and expands, and the reference pin is formed on the inner panel. It is desirable that the inner panel is pressed down by the elastic repulsive force of the expanded rubber tube body in a state of being inserted into the reference hole.

  By configuring in this manner, the inner panel can be pressed by the elastic repulsive force of the rubber balloon body expanded in the pressing member and the rubber tube body expanded in a donut shape around the reference pin. Regardless, the inner panel can be pressed down securely.

  According to the present invention, in the hemming device that aligns the inner panel with respect to the outer panel, and hemmes and presses the flange portion of the outer panel to the edge portion of the inner panel with a hem blade, regardless of the shape of the inner panel, It is possible to obtain a hemming device that can cope with the alignment and pressing of the inner panel, has high versatility, and can reduce the cost of the device.

Hereinafter, embodiments of a hemming device according to the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a schematic configuration of a hemming device according to the present invention.
The work to be hemmed by the hemming apparatus according to the present invention includes lids such as hoods, luggages, and doors assembled in the automobile manufacturing process. Will be described as an outer panel W1 and an inner panel W2.

  As shown in FIG. 1, the hemming device 1 includes a lower mold 2 on which the outer panel W1 is placed and a locator that is provided at the upper end (both ends in the figure) of the lower mold 2 and used for alignment of the outer panel W1. 3 and an inner panel W2, and a pressure pad 4 that presses both panels W1 and W2 and fixes the position.

Here, the configuration of the pressure pad 4 will be described in detail with reference to FIGS. FIG. 2 is a perspective view showing the form of the upper surface of the pressure pad 4, and FIG. 3 is a perspective view showing the form of the lower surface (back side) of the pressure pad 4.
The pressure pad 4 for pressing the entire outer panel W1 and the inner panel W2 substantially uniformly has a plate-like frame 5 that holds a positioning pin 13 and a pressing member 14 (pressing means) as shown in the figure. As shown in FIG. 2, a connecting portion 6 connected to the robot arm 10 (see FIG. 1) of the pad moving robot 21 is formed in the center on the upper surface side of the frame 5.

Further, as shown in FIG. 3, the back side (lower side) of the frame 5 is divided into, for example, two areas on the left and right of the area 5a and the area 5b along the longitudinal direction of the workpiece, and the positioning pin in each of the areas 5a and 5b. 13 and the pressing member 14 are provided.
In each area 5a, 5b, as shown in FIG. 3, a guide rail 11 is laid in the X-axis direction, and a guide rail 12 is laid in the Y-axis direction.

The positioning pin 13 includes an NC locator (numerically controlled positioning device) 15 that can move in the XY-axis direction along the guide rails 11 and 12, and a reference provided so as to protrude above the NC locator 15 in FIG. The pin 17 and the rubber tube body 16 are provided in a donut shape around the reference pin 17 and have an elastic repulsion force by being expanded by supplying air to the inside.
With the configuration of the positioning pin 13, the reference pin 17 is orthogonal to the insertion direction into the reference hole h formed in the inner panel W 2 and can be moved in the XY axis directions by the NC locator 15.

  The pressing member 14 is provided above the NC locator 18 that can move in the Y-axis direction along the guide rail 12 and above the NC locator 18 in FIG. 3, and is elastically repelled by being supplied with air and expanding. A rubber balloon body 20 having a force and a support member 19 that supports the rubber balloon body 20 on the NC locator 18 are configured.

  Further, as shown in FIG. 1, the NC locators 15 and 18 are movable to predetermined positions on the guide rails 11 and 12 based on a control signal from the control means 23. The position adjustment of the positioning pin 13 and the pressing member 14 by controlling the movement of the NC locators 15 and 18 is performed when, for example, assembling the outer panel W1 and the inner panel W2 of a different vehicle model in the assembly line. To be done.

The rubber tube body 16 and the rubber balloon body 20 are configured such that air can be supplied to the inside thereof by the air supply means 22 under the control of the control means 23.
The pressure pad 4 can be moved up and down and left and right above the lower mold 2 by the pad moving robot 21. When pressing the panels W1 and W2, the pressure pad 4 is moved to a predetermined position and is moved at a predetermined pressure. The panel W2 is configured to press against the outer panel W1.

  In the hemming device 1 configured as described above, when the outer panel W1 and the inner panel W2 are bonded together, first, the outer panel W1 is placed on the lower mold 2, and the edge portion thereof is aligned along the locator 3. Thereby, the alignment of the outer panel W1 is completed.

Next, the inner panel W2 is placed on the outer panel W1, and the reference pin 17 of the positioning pin 13 is inserted into the reference hole h formed in the inner panel W2. Then, when the pressure pad 4 is moved to a predetermined position by the pad moving robot 21, the inner panel W2 is aligned.
Further, the air supply means 22 is driven by the control of the control means 23, and air is supplied into the rubber tube body 16 in the positioning pin 13 and the rubber balloon body 20 in the pressing member 14. Thereby, the rubber tube body 16 and the rubber balloon body 20 are greatly expanded, and the panels W1 and W2 are pressed against the lower mold 2 by the elastic repulsion force as shown in FIG.

  Then, the hem blade 25 moves downward, and the edge portion of the outer panel W1 preliminarily bent into an L shape is pressed by the hem blade 25 to bend (hemming press), and the edge portion of the outer panel W1 The edge part of the inner panel W2 is clamped.

An example of the case where the hemming device 1 configured in this way is used in an assembly production line will be described with reference to FIG.
In the case of the example shown in FIG. 5, three lower molds 2 can correspond to one pressure pad 4 in the configuration of the hemming device 1.

  That is, as shown in FIG. 5, lower molds 2A, 2B, and 2C having the same configuration as the lower mold 2 are arranged along the production line L. Then, on both sides of the lower molds 2A, 2B, and 2C, there is one transfer robot 32 for carrying the outer panel W1 and the inner panel W2 in and out, and one pad moving robot 21 that moves the pressure pad 4. Is arranged.

  Further, the transfer robot 32 can move back and forth along the transfer direction on the transfer device 30 provided along the transfer line L, and the pad moving robot 21 can be transferred to the transfer device 31 provided along the transfer line L. It can be moved back and forth along the transport direction.

  In such a configuration, the timing of carrying in / out of the panels W1, W2 by the transfer robot 32 and the timing of the alignment processing of the panel W2 by the pad moving robot 21 are as follows for the lower molds 2A, 2B, 2C, for example: It can be done efficiently in order.

  That is, when the transport robot 32 transports the panels W1-1 and W2-1 to the lower mold 2A, the pad moving robot 21 performs alignment processing of the panel W2-2 in the lower mold 2B, and the transport robot 32 performs the panel W1. -2, W2-2 When performing transport to the lower mold 2B, the pad moving robot 21 performs alignment processing of the panel W2-3 in the lower mold 2C, and the transport robot 32 performs the lower processing of the panels W1-3, W2-3. When transporting to the mold 2C, the pad moving robot 21 performs alignment processing of the panel W2-1 in the lower mold 2A.

  In this way, it is possible to efficiently carry out the loading / unloading timing of the panels W1 and W2 of a plurality of different vehicle types and the alignment of the panels W2 on the transport line L, and the processing performance can be improved. . Moreover, according to such a structure, since the one pressure pad 4 can respond | correspond to the some lower mold | type 2, the cost concerning an apparatus can be reduced.

As described above, according to the embodiment of the hemming device of the present invention, even if the position of the reference hole h in the inner panel W2 differs depending on the vehicle type, the position of the reference pin 17 in the pressure pad 4 is moved and adjusted. Can easily cope with this.
Further, the inner panel W2 can be pressed by the elastic repulsion force of the rubber balloon body 20 expanded at the pressing member 14 and the rubber tube body 16 expanded at the positioning pin 13, so that the inner panel regardless of the shape of the inner panel W2. W2 can be reliably pressed down.
Therefore, the pressure pad 4 provided in the hemming device 1 can be used for the inner panel W2 that is different for each vehicle type, and the cost for the device can be reduced.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for a hemming device that hemmes and presses a flange portion of an outer panel placed on a lower mold on an edge portion of an inner panel with a hem blade in a vehicle assembly process or the like.

FIG. 1 is a cross-sectional view showing a schematic configuration of a hemming device according to the present invention. FIG. 2 is a perspective view showing the form of the upper surface of the pressure pad provided in the hemming device of FIG. FIG. 3 is a perspective view showing the form of the lower surface (back side) of the pressure pad provided in the hemming device of FIG. 1. 4 is a cross-sectional view showing a state in which the inner panel is pressed by a pressure pad provided in the hemming device of FIG. FIG. 5 is a plan view showing an example in which the hemming device according to the present invention is used in a production line. FIG. 6 is a process diagram for explaining hemming press processing by a conventional hemming apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hemming apparatus 2 Lower mold | type 3 Locator 4 Pressure pad 5 Frame 6 Connection part 11 Guide rail 12 Guide rail 13 Positioning pin 14 Pressing member (pressing means)
15 NC locator 16 Rubber tube body 17 Reference pin 18 NC locator 19 Support member 20 Rubber balloon body 21 Pad moving robot 22 Air supply means 23 Control means 25 Hem blade h Reference hole W1 Outer panel W2 Inner panel

Claims (4)

In the hemming device in which the outer panel is placed on the lower mold, the inner panel is placed on the outer panel, and the flange portion of the outer panel is hemmed to the edge of the inner panel with a hem blade,
A pressure pad for aligning the inner panel with the outer panel and fixing the position of the inner panel by pressing;
The pressure pad includes a reference pin that can be inserted into a reference hole for alignment formed in the inner panel, and a pressing unit that presses the inner panel in a state where the reference pin is inserted into the reference hole. And
The hemming device according to claim 1, wherein the reference pin and the pressing means are provided so as to be movable in at least one predetermined direction.   The hemming device according to claim 1, wherein the reference pin is provided so as to be movable in a two-dimensional axis direction orthogonal to a direction of insertion into the reference hole. The pressing means has a rubber balloon body having an elastic repulsion force by being supplied with air and expanding.
The hemming device according to claim 1 or 2, wherein the inner panel is pressed by an elastic repulsive force of the rubber balloon body in an inflated state. The pressure pad is provided in a donut shape around the reference pin, and has a rubber tube body having an elastic repulsive force by being supplied with air and expanding.
4. The inner panel is pressed by an elastic repulsive force of the rubber tube body in an expanded state in a state where the reference pin is inserted into a reference hole of the inner panel. The hemming device described in 1.

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