JP2006289469A - Workpiece setting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece setting device capable of facilitating accurate positioning of a workpiece. <P>SOLUTION: Positional adjustment in an X direction and that of in a Y direction are executed to supporting members 100, 200. Only the positional adjustment in the X direction is executed to a supporting member 300. The positional adjustment in the X direction and that of in a Z direction are executed to a supporting member 400. Next, the workpiece W is placed so as to be set against the supporting members 100-400 to which the positional adjustment has been executed. Then, since a base frame 2 is inclined, the right end edge of the workpiece W is brought into contact with a reference pin 3 and the lower end edge of the workpiece W is brought into contact with receiving pieces 114, 214. Consequently, the workpiece W is positioned. At that time, the rear face of the workpiece W abuts on lower clamping claws 109, 209, 309, and 409 of the supporting members 100, 200, 300, and 400. Accordingly, the workpiece W is clamped by the upper/lower clamping claws of each supporting member 100, 200, 300, and 400 and welded in that state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a workpiece setting device that clamps and holds a workpiece in a predetermined posture in order to perform welding or the like.

  An automobile door panel is formed by welding an outer panel and an inner panel. When welding, the two panels are stacked and clamped so that they do not move. And when welding, if two panels have shifted | deviated, it cannot weld correctly. Therefore, there are those disclosed in Patent Documents 1 to 3 as set devices for positioning such plate-like members and preparing them for welding or the like.

  In Patent Document 1, a shift unit that can move in the X, Y, and Z directions is provided on a horizontal base, and a reference pin that engages with a positioning hole of the work is attached to the shift unit. Further, separately from the reference pin on the horizontal base. There has been disclosed a positioning mechanism that is provided with a second shift unit having a sphere at the tip and capable of moving up and down, and can cope with a change in the shape of the workpiece.

  Japanese Patent Application Laid-Open No. 2004-228688 discloses a transport device that provides a locate pin having a degree of freedom of movement in the XYZ three-axis movement direction on a transport carriage and moves the locate pin in response to a change in the shape of a door panel or the like.

In Patent Document 3, four clamp mechanisms are provided on a horizontal base so as to be movable in the horizontal direction, the clamp mechanism is composed of upper and lower clamp claws made of urethane resin, and the clamp mechanism is further moved by being pushed by a welding robot. It is disclosed that positioning of the clamp mechanism is performed.
JP 11-48047 A JP 2002-263965 A JP 2004-322107 A

  In any of the above-mentioned devices, when the shape of the workpiece changes due to a model change, etc., the four locate pins and clamp mechanisms that are normally provided are moved in three directions XYZ to match the changed model dimensions. ing. As described above, conventionally, a device for moving the locating pin and the clamp mechanism in the three directions of XYZ is required, which causes problems such as a complicated setting device, an increase in cost and a long time for positioning the workpiece. ing.

  In order to solve the above-mentioned problems, the present invention provides a work setting device in which at least four support members for clamping a plate-like work are provided on a base frame provided on a base, wherein the base frame is located on one side of the left and right sides above the other side. And tilted rearward from the vertical posture, the diagonal left and right direction along the base frame as the X direction, the diagonal vertical direction along the base frame as the Y direction, and the direction orthogonal to the X and Y directions as the Z direction. Of the at least four support members provided on the frame, three support members excluding the highest support member are fixed in the Z direction, and only the highest support member can be adjusted in the Z direction. The configuration was as follows.

  When the plate-like workpiece is supported at three points, all three points always come into contact with the plate-like workpiece, so that at least three support members can be fixed in the Z direction, and only the remaining support members are Z. The position can be adjusted in the direction. And by comprising in this way, the structure of the whole work set apparatus can be simplified.

Further, it is preferable that at least two of the three support members fixed in the Z direction are movable in the X direction and the Y direction.
Even when the shape of the plate-like workpiece changes due to the model change, it is possible to easily cope with the above configuration.

  Further, the plate-like work is positioned so as to abut on a reference pin standing on the base frame, a support member at the lowest position among the support members, and a stopper attached to the support member at the next lower position. By doing so, it is not necessary to insert a locating pin or the like into the positioning hole of the work, and the setting of the plate-like work becomes easy.

  In the work setting device according to the present invention, since the base frame is inclined, at least four support members have different height positions, and the three support members need not be adjusted in the Z direction. Compared with this device, the structure is greatly simplified and it is easy to use.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of a work setting device according to the present invention, FIG. 2 is a side view of the work setting device, and the work setting device is provided with a base frame 2 on a base 1. As shown in FIG. 1, the left and right sides of the base frame 2 are above the other side, and as shown in FIG. 2, the base frame 2 is inclined rearward from the vertical posture.

  Support members 100, 200, 300, and 400 are provided at the four corners of the base frame 2, and a reference pin 3 is erected between the left and right side portions of the base frame 2 that are at the lower positions. ing.

  Here, the support members 100 and 200 are defined such that the diagonal left and right direction along the base frame 2 is the X direction, the diagonal vertical direction along the base frame 2 is the Y direction, and the direction orthogonal to the X and Y directions is the Z direction. , 300, 400 will be described in detail.

  The support member 100 and the support member 200 are the same except for the left and right structure of the members, and the other structures are the same. Therefore, the support member 100 will be described with reference to FIGS. Detailed description is omitted.

  3 is a front view of the support member 100, FIG. 4 is a view in the direction of arrow A in FIG. 3, FIG. 5 is a view in the direction of arrow B in FIG. The movable body 102 is slidably engaged with the X-direction rail 101.

  A lock cylinder 103 is disposed between the X-direction rails 101 and 101 in parallel with the X-direction rail 101, and a bar 104 and a pusher 105 are attached to the rod end of the lock cylinder 103.

  Teaching is performed on a welding robot (not shown) for each type of workpiece W, and the arm of the welding robot is moved by placing the arm of the welding robot against the bar 104. Then, the rod of the lock cylinder 103 contracts and the pusher 105 moves the moving body 102 to the predetermined position taught. When the moving body 102 moves to a predetermined position, the lock cylinder 103 is turned on to fix the moving body 102 so as not to move.

  Further, the movable body 102 is provided with a Y-direction rail 106, and a holding block 107 is slidably engaged with the Y-direction rail 106, and the movable body 102 is movable in the Y direction by the operation of the cylinder unit 108. ing.

  A lower clamp claw 109 made of urethane resin is fixed to the holding block 107, and an opening / closing mechanism for opening and closing the upper clamp claw 110 that clamps the workpiece W with the lower clamp claw 109 is attached to the holding block 107. Yes.

  The upper clamp pawl 110 is opened and closed by engaging a link 112 with a cam plate 111 having a cam groove and moving the link 112 forward and backward in the Z direction by the cylinder unit 113.

  A receiving piece 114 is attached to the holding block 107. A receiving piece 214 similar to the receiving piece 114 is also provided on the support member 200. These receiving pieces 114, 214 position the workpiece W together with the reference pin 3. That is, when the workpiece W is placed on the support members 100 to 400, the base frame 2 is inclined as described above. Therefore, the right end of the workpiece W abuts on the reference pin 3, and the lower end of the workpiece W is Abutting on the receiving pieces 114 and 214, the workpiece W is accurately positioned.

  Next, the support member 300 will be described with reference to FIGS. 6 is a front view of the support member 300, FIG. 7 is a view in the direction of the arrow C in FIG. 6, and FIG. 8 is a view in the direction of the direction D in FIG. The moving body 302 is slidably engaged with the X-direction rail 301.

  A lock cylinder 303 is disposed between the X-direction rails 301 and 301 in parallel with the X-direction rail 301, and a bar 304 and a pusher 305 are attached to the tip of the rod of the lock cylinder 303. Thus, the moving body 302 is moved to a predetermined teaching position by the welding robot, and is locked by the lock cylinder 303 at that position.

  The moving body 302 is not provided with a Y-direction rail, and a holding block 307 is directly attached to the moving body 302. A lower clamp claw 309 made of urethane resin is fixed to the holding block 307. An opening / closing mechanism that opens and closes the upper clamp claw 310 that clamps the workpiece W with the lower clamp claw 309 is attached.

  The upper clamp pawl 310 is opened and closed by engaging a link 312 with a cam plate 311 having a cam groove and moving the link 312 forward and backward in the Z direction by a cylinder unit 313.

  Next, the support member 400 will be described with reference to FIGS. 9 is a front view of the support member 400, FIG. 10 is a view in the direction of arrow E in FIG. 9, FIG. 11 is a view in the direction of arrow F in FIG. 9, and the support member 400 has the support members 100 and 200 in the X direction. The support member 300 can be moved in the X direction, whereas the support member 300 is movable in the X direction.

  That is, the support member 400 has an X-direction rail 401 attached to the base frame 2, and a movable body 402 is slidably engaged with the X-direction rail 401. A lock cylinder 403 is disposed between the X-direction rails 401 and 401 in parallel with the X-direction rail 401, and a bar 404 and a pusher 405 are attached to the rod end of the lock cylinder 403. By doing so, the moving body 402 is moved to a predetermined teaching position by the welding robot, and is locked by the lock cylinder 403 at that position.

  The moving body 402 is provided with a bracket 406, and an electric actuator 407 in the Z direction is attached to the bracket 406. A holding block 408 is attached to the electric actuator 407, a lower clamp claw 409 made of urethane resin is fixed to the holding block 408, and an upper clamp that clamps the workpiece W between the lower clamp claw 409 and the holding block 408. An opening / closing mechanism for opening and closing the claw 410 is attached.

  The opening / closing mechanism of the upper clamp pawl 410 includes links 411 and 412 and a cylinder unit 413 connected to the link 411.

  In the above, in order to integrate the workpiece W in which the outer panel and the inner panel are overlapped by welding, first, the positions of the support members 100 to 400 are adjusted in accordance with the model shape of the workpiece W.

  In the position adjustment, the positions of the support member 100 and the support member 200 in the X direction and the Y direction (clamp position) are adjusted. The position adjustment in the X direction is performed by the welding robot as described above, and is not moved after the adjustment by the lock cylinder. Further, the Y direction is adjusted by driving the cylinder units 108 and 208. After adjustment, it is locked as above.

  The support member 300 is locked only by adjusting the position in the X direction by the welding robot, and the support member 400 is adjusted by the welding robot in the X direction and the electric actuator 405 in the Z direction.

When the plate-like workpiece W is supported by four or more support members, the three points are always supported by the support members. For example, in this embodiment, the lower clamp claws 109, 209, and 309 of the support members 100, 200, and 300 always come into contact with the back surface of the workpiece W. However, if only three points are supported, the workpiece W may be displaced during welding.
Therefore, in the present embodiment, the plate-like workpiece W is supported at four points by adjusting the position of the lower clamp pawl 409 of the support member 400 in the Z direction.

As described above, when the workpiece W is placed on the support members 100 to 400 that have been adjusted in position, the base frame 2 is inclined, so that the right edge of the workpiece W comes into contact with the reference pin 3. The lower edge of the workpiece W comes into contact with the receiving pieces 114 and 214, and the workpiece W is positioned. At this time, the back surface of the workpiece W is in contact with the lower clamp claws 109, 209, 309, and 409 of the support members 100, 200, 300, and 400.
Therefore, the workpiece W is clamped by the upper and lower clamp claws of each support member 100, 200, 300, 400, and welding is performed in this state.

  The work setting apparatus according to the present invention can be used as an apparatus that overlaps and sets the outer panel and the inner panel when welding the outer panel and the inner panel constituting the automobile door.

Front view of a work setting device according to the present invention Side view of the work setting device Front view of the support member in the lowest position A direction arrow view of FIG. B direction arrow view of FIG. Front view of support member in second height position from above C direction arrow view of FIG. D direction arrow view of FIG. Front view of the support member in the uppermost position E direction arrow view of FIG. F direction arrow view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Base frame, 3 ... Reference | standard pin, 100, 200, 300, 400 ... Support member, 101, 301, 401 ... X direction rail, 102, 302, 402 ... Moving body, 103, 303, 403 ... Lock cylinder, 104, 304, 404 ... Bar, 105, 305, 405 ... Pusher, 106 ... Y-direction rail, 107, 307 ... Holding block, 108, 208 ... Y-direction cylinder unit, 109, 309, 409 ... Bottom clamp Claw, 110, 310, 410 ... Upper clamp claw, 111, 311 ... Cam plate, 112, 312, 411, 412 ... Link, 113, 313, 413 ... Clamp cylinder unit, 114, 214 ... Receiving piece, 406 ... Bracket 407: Electric actuator, 408: Holding block, W: Workpiece.

Claims (3)

In a work setting device in which at least four support members for clamping a plate-like work are provided on a base frame provided on a base, the base frame is inclined to the rear from a vertical posture with one of the left and right sides being higher than the other side. , At least four supports provided on the base frame, where the diagonal left and right direction along the base frame is the X direction, the diagonal vertical direction along the base frame is the Y direction, and the direction perpendicular to the X and Y directions is the Z direction. The three support members excluding the support member at the highest position among the members are fixed in the Z direction, and only the support member at the highest position can be adjusted in the Z direction. . The work setting apparatus according to claim 1, wherein at least two of the three support members fixed in the Z direction are movable in the X direction and the Y direction. 2. The work setting device according to claim 1, wherein the plate-like work is attached to a reference pin erected on a base frame, a support member at the lowest position among the support members, and a support member at the next lower position. A workpiece setting device, wherein the workpiece setting device is positioned in contact with a stopper.