JPH07185827A - Welding equipment provided with turn table - Google Patents

Abstract

PURPOSE:To surely realize the power supply even when a clamp gun for welding is provided in a place on a turn table where the direct power supply is difficult in equipment to weld a work such as a side panel of a body. CONSTITUTION:When a clamp gun 4 and a first contact electrode 13 are provided on a turn table 1 and these are connected by the power supply cable 15, and a stud gun 19 mounted on robot equipment 18 is brought into contact with the first contact electrode 13, a power source circuit ranging a power source circuit 23 for welding the stud gun 19 the first contact electrode 13 the power supply cable 15 the clamp gun 4 the work W the fixed electrode for the clamp gun-a conductive cable 17 a conductive body 16 a second contact electrode 20 the power source circuit 23 for welding is formed to charge the power to the clamp gun 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding device equipped with a turntable, and more particularly to a device for welding a work set on the turntable by a clamp gun.

[0002]

2. Description of the Related Art For example, in Japanese Utility Model Laid-Open No. 59-44680, a plurality of welding guns are attached to a movable table as a device for changing the posture of a vehicle body side panel and welding, and a welding gun according to a welding portion is provided. A technique is disclosed in which, when selected, the power feeding connection terminal of the welding gun is connected to the power feeding terminal on the moving base side to perform power feeding. With such a device, selective automatic power supply to the welding gun is possible.

[0003]

By the way, in the case of welding a work such as the vehicle body side panel described above, a turntable is provided, the work is set on the turntable, and the turntable is rotated to the welding position. Welding may be considered by a robot device or a clamp gun mounted on the turntable. However, if a clamp gun is provided on the turntable, a mechanism for supplying power to the clamp gun from outside the turntable is required when the work reaches the welding position, but the turntable rotates, so Depending on the welding site, there may be a case where it is structurally difficult to supply power to the clamp gun arranged in the vicinity of the welding site, and there is a problem that the welding site is restricted.

Therefore, an object of the present invention is to provide a welding apparatus in which a clamp gun is provided on a turntable and which can supply power regardless of the welding site.

[0005]

That is, the present invention is an apparatus for welding a work set on a turntable, wherein the turntable sets the work and the position at which the work is welded. The first part of the clamp gun, which is rotatably connected to the clamp gun, the clamp gun, the clamp gun fixed electrode located corresponding to the clamp gun with the work sandwiched therebetween, and the power supply cable connected to the clamp gun. Second contact electrode is provided outside the turntable and is electrically connected to the clamp gun fixed electrode when the turntable is rotated to the welding position, and the stud gun is connected to the first contact electrode. And a robot device for pressing the stud gun and the stud gun and the second contact electrode together to provide a welding power supply circuit. Characterized in that it is connected.

[0006]

According to the above construction, when the turntable is rotated to the welding position after setting the work, the clamp gun fixed electrode on the turntable side and the second contact electrode outside the turntable are electrically connected. Therefore, if the stud gun is pressed against the first contact electrode on the turntable side by the robot device, the welding power supply circuit → stud gun → first contact electrode → power supply cable → clamp gun → work → clamp gun fixed electrode → second contact The energization circuit from the electrode to the power supply circuit is formed, so that the clamp gun can be turned on. For this reason,
The clamp gun connected to the first contact electrode by a cable can reliably supply power to any position on the turntable.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a turntable 1 provided on a welding station. The turntable 1 is rotatably supported by a rotation driving means 2 and is set at a work setting position X.
A work W such as a vehicle body side panel is set on the work support member 3 on the turntable 1 on the 1st side, and thereafter, the work W is rotated toward the welding position X2 side, and the work W is welded on the welding position X2 side.

In this case, the turntable 1 is equipped with a clamp gun 4 for welding a predetermined portion of the work W. The clamp gun 4 is attached to a rotating arm 5 as shown in FIGS. 2 and 3, and the rotating arm 5 is rotated up and down by a bracket 6 provided on the side surface of the work supporting member 3 via a support shaft 7. The air cylinder 8 is mounted so as to be movable, and the air cylinder 8 is interposed between the rotary arm 5 and the upper surface of the turntable 1, so that the air cylinder 8 expands and contracts to perform the above-described rotation. Then, when the rotating arm 5 is lifted as shown in FIG. 3 due to the extension of the air cylinder 8, the clamp gun 4 clamps a predetermined portion of the work W and the work W,
The work W is welded to the mounting member Z overlaid on the work W. Therefore, the work supporting member 3 is provided with a clamp gun fixed electrode 9 corresponding to the clamp gun 4.

As shown in FIG. 3, the work W set on the work supporting member 3 and the mounting member Z are formed with positioning holes 10 at a plurality of positions, and the work W and the like are attached to the work supporting member 3. , The positioning pin 12 is projected by the air cylinder 11 provided in the work supporting member 3 to engage with the positioning hole 10,
The work W or the like is positioned.

A first contact electrode 13 is attached to the turntable 1 at a position near the clamp gun 4 and at a position where it does not interfere with the work W being set, through a mounting base 14. Electrode 1
3 and the clamp gun 4 described above are connected by a power supply cable 15.

Further, the work supporting member 3 is provided with a conductive plate (copper plate) 16 having one end 16A exposed on the side surface of the turntable 1, and the conductive plate 16 and the clamp gun fixed electrode 9 are conductive. Connected by a cable 17.

On the other hand, at the welding position X2, a robot device 18 is provided on the side of the turntable 1, and a stud gun 19 is attached to the tip of a robot arm 18A in the robot device 18, and the conductive plate 1 is also provided.
The second contact electrode 20 is attached to the pedestal 21 (see FIG. 1) so as to correspond to the one end 16A of 6 and the second contact electrode 20 is moved forward and backward with respect to the turntable 1 by the air cylinder 22. ing.
The second contact electrode 20 and the stud gun 19 are connected to the welding power supply circuit 23, and a controller 24 for controlling the welding power supply circuit 23 and the robot device 18 is provided.

According to this welding apparatus, the work supporting member 3
After setting the work W and the mounting member Z on the work table W, the turntable 1 is rotated to pivotally move the work W to the welding position X2 side, and then the air cylinder 22 is extended to move the second contact electrode 20 to the conductive plate 16. From the state in which the work W and the like are clamped by the clamp gun 4 and the clamp gun fixed electrode 9, the clamp gun 4 is brought into contact with the one end 16A and the air cylinder 8 is extended to contact the work W and the mounting member Z with each other. When the robot device 18 is operated to bring the stud gun 18 into contact with the first contact electrode 13 from above, the welding power supply circuit 2
3 → stud gun 18 → first contact electrode 13 → power supply cable 15 → clamp gun 4 → workpiece W → clamp gun fixed electrode 9 → conductive cable 17 → conductor 16 → second contact electrode 20 → welding power supply circuit 23 When the energizing circuit is formed, the clamp gun 4 is turned on and the work W and the attachment member Z can be welded.

As described above, the stud gun 19 connected to the welding power supply circuit 23 is brought into contact with the first contact electrode 13 provided separately from the clamp gun 4, and the clamp gun is fed from the first contact electrode 13 via the power supply cable 15. Since the power is supplied to the robot 4, the power can be supplied by providing the first contact electrode 13 at a position where the stud can 19 can be easily applied by the robot device 18, even if it is difficult to directly supply power from the robot device 18. Power can be supplied even if the clamp gun 4 is provided.

Although the work W and the mounting member Z are welded by the clamp gun 4 in the above description, the welding by the clamp gun 4 is not performed, and the change gun (contact gun) 25 shown in FIG. This change gun 2 attached to the robot arm 18A instead of
When welding the work W with No. 5, controller 2
Reference numeral 4 connects the change gun 25 and the corresponding change gun fixed electrode 26 to the welding power source circuit 23 to perform the above welding. Further, the rotation attitude of the turntable 1 is input to the controller 24 by a sensor 27 or the like.

[0017]

As is apparent from the above description, according to the present invention, by rotating the turntable on which the work is set to the welding position, the clamp gun electrode on the turntable side and the second outside the turntable are provided. Since it is electrically connected to the contact electrode, if the robot device presses the stud gun against the first contact electrode on the turntable side, this stud gun functions as a contact gun. Gun →
An energizing circuit is formed from the first contact electrode → power supply cable → clamp gun → work → clamp gun fixed electrode → second contact electrode → power circuit, so that the clamp gun can be turned on. For this reason, the clamp gun connected to the first contact electrode by the cable can reliably supply power to any position on the turntable, and the clamp gun can be arranged at any position to limit the work welding site. It can be lost.

[Brief description of drawings]

FIG. 1 is a schematic side view of a welding device according to an embodiment of the present invention.

FIG. 2 is a plan view of a turntable in the welding device.

FIG. 3 is an enlarged side view of a main part of FIG.

[Explanation of symbols]

 1 Turntable 4 Clamp Gun 9 Clamp Gun Fixed Electrode 13 First Contact Electrode 15 Power Supply Cable 18 Robot Device 19 Stud Gun 20 Second Contact Electrode 23 Welding Power Circuit

Claims (1)

[Claims] 1. A device for welding a work set on a turntable, wherein the turntable is rotatable between a position for setting the work and a position for welding the work, and A clamp gun, a clamp gun fixed electrode positioned corresponding to the clamp gun with the work sandwiched therebetween, and a first contact electrode connected to the clamp gun by a power supply cable are provided on the turntable, and Provided outside the turntable are a second contact electrode electrically connected to the clamp gun fixed electrode when the turntable is rotated to a welding position, and a robot device for pressing a stud gun against the first contact electrode. The stud gun and the second contact electrode are connected to a welding power source circuit. Welding equipment equipped with a turntable.