JP2004276052A - Welding fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a welding fixture in which a storage place can be reduced, and at the same time, the occurrence of separation of a moving board from a base is prevented. <P>SOLUTION: The base 25 and the moving boards 31, 31 are integrated. After that, a fixture set 65 is detached from a truck 15. Next, a new fixture set 66, in which the base 25 and the moving boards 31, 31 are integrated, is laid on the truck 15. By this, the fixture sets 65 can be replaced with the fixture 66. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a welding jig used for bonding two panels such as a vehicle body side panel by welding, and a method of replacing the same.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, various types of jigs suitable for an operation of bonding two panels by welding have been proposed (for example, see Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent No. 3327108 (pages 7-8, FIG. 1)
[0004]
FIG. 11 is a reprint of Patent Document 1, wherein 10 is an outer panel, 14 is an assembling jig, 24 is a first clamp device 44 is a locator (see paragraph number [0038] of Patent Document 1 above), 12 is an inner panel, 48 Is a clamp device, and 52 is a positioning member (see paragraph [0041] of Patent Document 1).
[0005]
Then, first, the outer panel 10 is positioned by the locator 44 and clamped by the first clamp device 24. Next, the inner panel 12 is placed, positioned by the positioning member 52, and clamped by the clamp device 48. Then, both panels 10 and 12 are welded by a portable spot welding device (not shown) and integrated.
The loading of the panels 10 and 12 into the assembly jig 14 is performed manually.
[0006]
[Problems to be solved by the invention]
The panels 10 and 12 are, for example, rear walls of a cab of a cab-over type truck (see paragraph No. [0007], first and second lines of Patent Document 1). Since the vertical and horizontal dimensions and the positioning position of the rear wall change when the vehicle type changes, in principle, a large number of the assembling devices 14 must be installed only for the type of work. Since the floor area of the welding site is limited, it is not preferable to install a large number of assembly devices.
[0007]
If a single jig device can accommodate workpieces of various sizes, it has never exceeded that. However, for that purpose, the structure of the assembly jig 14 must be changed to an extremely complicated device, and it becomes expensive.
[0008]
Further, since the panels 10 and 12 are manually carried into the assembling apparatus 14, the burden on the operator is not so light. Although it is possible to move the panels 10 and 12 with a robot hand, it is necessary to modify the structure of the assembling apparatus 14 so as to correspond to the robot hand.
[0009]
An object of the present invention is to replace a welding jig with a relatively simple structure capable of accommodating a panel of a plurality of sizes and a welding jig. Is to provide.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, claim 1 is a welding jig used for an operation of integrating a first member with a second member by welding along the second member,
A base having a first clamp for holding down a first member and a second clamp for holding down a second member attached to the first member;
A moving plate that includes a third clamp for holding down the second member, is detachably attached to the robot hand, and moves the second member from the component storage to the base;
A plurality of cylinder units extending from the moving board or the base,
A lock mechanism for fixing the receiving end for receiving the tip of the piston rod of the cylinder unit and the tip of the piston rod, provided on the base or the moving plate,
At the time of non-welding work, the jig set is formed by integrating the moving plate with the base via the cylinder unit, the seat and the lock mechanism so that the base and the moving plate can be collectively managed as a set. It is characterized by.
[0011]
A jig set is composed of a base having a simple structure and a moving board having a similarly simple structure. Since the structure is simple, the jig set is inexpensive, and a plurality of jig sets can be easily prepared according to the type of work.
[0012]
At this time, there is a problem in storing the moving board attached to the robot hand and the base not attached to the robot hand. That is, there remains a problem that a floor area of a storage place for storing a plurality of moving boards and a base is increased, and that the moving board is separated from the base and is inconvenient.
[0013]
According to the first aspect, at the time of non-welding work, a jig can be set by integrating the movable platen with the base via the cylinder unit, the receiving seat, and the lock mechanism.
Since the base and the moving board can be collectively managed as a set, the storage place can be compressed, and the moving board does not separate from the base, so that the usability is improved.
[0014]
A second aspect of the present invention relates to a method of replacing a welding jig, wherein the welding jig according to the first aspect is replaced with a replacement jig place, a place for attaching the first and second members, and a place for welding the first and second members. In the non-welding operation, the moving plate is integrated with the base via the cylinder unit, the receiving seat and the lock mechanism at the place of attachment of the member, and the robot hand is moved to the second position. Separated from the member and put on standby, the integrated base and moving plate are moved to the replacement jig storage place, the new and old jig set is replaced in this jig storage place, and the new jig set is replaced with the member mounting place. The robot hand is connected to the moving plate of the new jig set at the installation place of the member, the lock mechanism in the new jig set is released, and the piston rod of the cylinder unit is retracted, so that the next welding Ready for work And wherein the Rukoto.
[0015]
It is easy to replace old and new jig sets. That is, a jig set is formed by integrating the moving plate with the base while skillfully utilizing the robot hand at the place where the first and second members are attached, and this jig set is moved to the jig place for replacement. Therefore, the jig set is replaced with a new jig set, the new jig set is returned to the mounting place of the members, and the moving plate of the new jig set is connected to the robot hand to prepare for the next welding operation.
[0016]
All of the cylinder unit, receiving seat, and lock mechanism, which are members for connecting the moving board to the base, are always provided on the base and the moving board, so even if the jig set is integrated and disassembled repeatedly, the cylinder unit, The replacement of the welding jig can be carried out smoothly and effectively without fear of losing the receiving seat or the lock mechanism.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals.
FIG. 1 is a layout diagram of a welding line according to the present invention, in which a welding jig storage space 11, a member mounting space 12, and a member welding space 13 are arranged on a welding line 10. The jig 20 is made movable by, for example, being mounted on a carriage 15 running on the rail 14, the old and new jigs are exchanged at the jig place 11 for exchange, the members are taken in at the attachment place 12 for members, and the members are welded. The members are welded in a place 13. Reference numeral 16 denotes a welding robot. The details of the other components will be described below in order.
[0018]
FIG. 2 is an exploded perspective view of the welding jig according to the present invention. The welding jig 20 includes a plurality of first clamps 22... (...) That hold down the outer panel 21 as a first member. The same) and a second clamp 24 for holding inner panels 23A, 23B (not shown in the figure) as a second member attached to the outer panel 21, and a support frame 26 for supporting the base 25. And a third clamp 27 for holding down the inner panels 23A and 23B, detachably attached to the robot hands 28 and 28, and moving plates 31 and 31 for moving the inner panels 23A and 23B from the parts storage 29 to the base 25. And a base-moving board coupling mechanism described later.
[0019]
The base 25 and the support frame 26 are manufactured separately, and the base 25 is attached to the support frame 26 with a fastening part such as a bolt. However, since the base 25 is substantially an integral body, it is acceptable to integrate the base 25 and the entire base.
[0020]
FIG. 3 is a perspective view of the base-moving plate connecting mechanism according to the present invention. The base-moving plate connecting mechanism 40 includes a cylinder unit 41 extending from the moving plate 31 and the support frame 26 (or the base 25). It comprises a receiving seat 43 for receiving the tip of the piston rod 42 and a lock mechanism 50 for fixing the tip 44 of the piston rod.
[0021]
The cylinder unit 41, the receiving seat 43, and the lock mechanism 50 are provided at positions that do not interfere with the work (the outer panel or the inner panel).
Contrary to the present embodiment, the cylinder unit 41 may be extended from the support frame 26 (or the base 25), and the receiving seat 43 and the lock mechanism 50 may be provided on the movable platen 31 side.
[0022]
FIG. 4 is a view taken in the direction of arrow 4 in FIG. 3, and is a configuration diagram of the lock mechanism according to the present invention.
The lock mechanism 50 mounts a bracket 52 on the base 51, mounts the receiving seat 43 on the bracket 52, raises a locate pin (positioning pin) 54 from the receiving seat 43, and swings the lock arm 55 and the drive arm 56 on the bracket 52. This mechanism is configured to be stopped by pins 57 to 59 as much as possible and to swing the drive arm 56 by the actuator 61.
[0023]
After the distal end portion 44 of the piston rod comes into contact with the receiving seat 43, the locking arm 55 presses the flange 63 of the distal end portion 44, so that the distal end portion 44 can be locked to the receiving seat 43. Reference numeral 62 denotes a proximity switch, and the proximity switch 62 can detect the collar 63.
[0024]
FIG. 5 is an operation diagram of FIG. 4, in which the lock arm 55 is swung counterclockwise in the figure by actuating the actuator 61 to bend the drive arm 56 in a square shape. Then, the lock is released, and the distal end portion 44 of the piston rod can be separated from the receiving seat 43. The separation of the tip 44 can be detected by the proximity switch 62.
[0025]
Next, the overall operation of the welding jig having the above configuration will be described. The operation at the time of welding will be described with reference to FIGS. 6 and 7, and the operation at the time of non-welding (at the time of jig replacement) will be described with reference to FIGS.
[0026]
FIG. 6 is an explanatory view (1) of the operation at the time of welding. The carriage 15, the support frame 26 and the base 25 are arranged in the member mounting place 12, and the outer panel 21 is applied to the base 25 by a robot (not shown). It is fixed with clamps 22. At this stage, the second clamps 24 are kept in the released state.
By the operation of the robot hands 28, 28, the inner panels 23A, 23B fixed to the movable boards 31, 31 by the third clamps 27,... Are made to face the base 25, and the movable boards 31, 31, as indicated by white arrows. To move forward.
[0027]
FIG. 7 is an explanatory view (part 2) of the operation at the time of welding. When the inner panels 23A and 23B are overlaid on the outer panel 21 and the inner panels 23A and 23B are clamped to the base 25 by the second clamps 24. The clamps 27... Are released, and the movable plates 31, 31 are retracted and put on standby.
[0028]
Then, the bogie 15 is caused to run and head toward the welding place 13 for the member, where predetermined welding is performed. The inner panels 23A and 23B can be welded and integrated with the outer panel 21 in the manner described above.
[0029]
Next, the procedure of jig replacement performed during non-welding will be described.
FIG. 8 is an explanatory view (No. 1) of the jig replacement according to the present invention. Since the jig is not welded, both the base 25 and the moving boards 31, 31 are empty (no work). In this state, the robot hands 28, 28 are operated, and the moving boards 31, 31 approach the base 25 as indicated by arrows. The piston rods 42 of the cylinder units 41 are extended in advance or during movement.
[0030]
Then, the distal ends of the piston rods 42 are brought into contact with the receiving seats 43. Next, as shown in FIG. 4, the distal end portion 44 is locked to the receiving seat 43 by the lock mechanism 50. This completes the conditions for removing the robot hands 28, 28 from the movable boards 31, 31.
[0031]
FIG. 9 is an explanatory view (part 2) of the jig replacement according to the present invention, and shows a state in which the robot hands 28, 28 are detached from the moving boards 31, 31. In this state, the base 25 and the moving boards 31, 31 are set on the carriage 15 as a set by the base-moving board coupling mechanism 40. Thereafter, both the carriage 15 and the support frame 26 move the base 25 and the moving plates 31 and 31 to the replacement jig storage place.
[0032]
FIG. 10 is an explanatory view (part 3) of the jig replacement according to the present invention. A jig composed of the base 25 and the movable plates 31, 31 together with the support frame 26 from the carriage 15 as indicated by an arrow using a crane (not shown). The set 65 is removed, and instead, the jig set 66 including the base 25 and the moving plates 31 and 31 is placed on the carriage 15 together with the new support frame 26 as shown by the arrow.
With this, the new and old jig sets 65.66 can be replaced. By returning the carriage 15 to the member mounting place, the next welding operation can be performed.
[0033]
The structure and type of the cylinder unit 41 are not limited as long as it is an air cylinder, a hydraulic cylinder, an electric cylinder, or similar equipment.
The first and second plate members may be of any type, such as a vehicle side panel, a door panel, and a trunk lid.
[0034]
【The invention's effect】
The present invention has the following effects by the above configuration.
In the first aspect, a jig set is constituted by a base having a simple structure and a moving plate having a similarly simple structure. Since the structure is simple, the jig set is inexpensive, and a plurality of jig sets can be easily prepared according to the type of work.
[0035]
At this time, there is a problem in storing the moving board attached to the robot hand and the base not attached to the robot hand. That is, there remains a problem that the floor area of a storage place for storing the plurality of moving boards and the base is large, and that the moving board is separated from the base and is inconvenient.
[0036]
According to the first aspect, at the time of non-welding work, a jig can be set by integrating the movable platen with the base via the cylinder unit, the receiving seat, and the lock mechanism.
Since the base and the moving board can be collectively managed as a set, the storage place can be compressed, and the moving board does not separate from the base, so that the usability is improved.
[0037]
According to the welding jig replacement method of the second aspect, the replacement of the old and new jig sets is easy. That is, a jig set is formed by integrating the moving plate with the base while skillfully utilizing the robot hand at the place where the first and second members are attached, and this jig set is moved to the jig place for replacement. Therefore, the jig set is replaced with a new jig set, the new jig set is returned to the mounting place of the members, and the moving plate of the new jig set is connected to the robot hand to prepare for the next welding operation.
[0038]
All of the cylinder unit, receiving seat, and lock mechanism, which are members for connecting the moving board to the base, are always provided on the base and the moving board, so even if the jig set is integrated and disassembled repeatedly, the cylinder unit, The replacement of the welding jig can be carried out smoothly and effectively without fear of losing the receiving seat or the lock mechanism.
[Brief description of the drawings]
1 is a layout view of a welding line according to the present invention; FIG. 2 is an exploded perspective view of a welding jig according to the present invention; FIG. 3 is a perspective view of a base-moving plate coupling mechanism according to the present invention; FIG. 3 is a view taken in the direction of arrow 4 in FIG. 3 and is a configuration diagram of a lock mechanism according to the present invention. FIG. 5 is an operation diagram of FIG. 4 FIG.
FIG. 7 is an operation explanatory view at the time of welding (part 2).
FIG. 8 is an explanatory view of a jig replacement according to the present invention (part 1).
FIG. 9 is an explanatory view of a jig replacement according to the present invention (part 2).
FIG. 10 is an explanatory view (3) of jig replacement according to the present invention.
FIG. 11 is a reprint of Patent Document 1. [Description of References]
DESCRIPTION OF SYMBOLS 10 ... welding line, 11 ... replacement jig storage place, 12 ... member installation place, 13 ... member welding place, 15 ... trolley, 20 ... welding jig, 21 ... outer panel as a 1st member, 22 ... No. 1 clamp, 23A, 23B ... inner panel as a second member, 24 ... second clamp, 25 ... base, 27 ... third clamp, 28 ... robot hand, 31 ... moving board, 40 ... base-moving board connecting mechanism 41, a cylinder unit, 42, a piston rod, 43, a receiving seat, 44, a distal end portion of a piston rod, 65, 66, a jig set.

Claims (2)

In a welding jig used for an operation of integrating a first member with a second member by welding along the second member,
A base having a first clamp for holding down a first member and a second clamp for holding down a second member attached to the first member;
A moving plate that includes a third clamp for holding down the second member, is detachably attached to the robot hand, and moves the second member from the component storage to the base;
A plurality of cylinder units extending from the moving board or the base,
A lock mechanism for fixing the receiving end for receiving the tip of the piston rod of the cylinder unit and the tip of the piston rod, provided on the base or the moving plate,
At the time of non-welding work, the jig set is formed by integrating the moving plate with the base via the cylinder unit, the seat and the lock mechanism so that the base and the moving plate can be collectively managed as a set. A welding jig. The welding jig according to claim 1, which can be moved in the order of a jig for replacement, a mounting place for the first and second members, and a welding place for the first and second members, or in reverse order.
At the time of non-welding work, at the mounting place of the member, the moving plate is integrated with the base via the cylinder unit, the receiving seat and the lock mechanism, and the robot hand is separated from the second member and made to stand by. The jig set for replacement is moved to the replacement jig place, the old and new jig sets are replaced in this jig place, the new jig set is returned to the member installation place, and the new jig set is newly installed in the member installation place. The robot hand is connected to the moving plate of the new jig set, the lock mechanism in the new jig set is released, and the piston rod of the cylinder unit is retracted to prepare for the next welding work. Jig replacement method.

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