JPH03185431A - Welding machine support device - Google Patents

Abstract

PURPOSE:To support a welder on pipelines of various kinds of shape by employing such constitution that a first clamp and a sub supporting arm are mounted on the other terminal of a main supporting arm connected to the welder in such a way that they can be turned freely, and a second clamp is supported on the other terminal of the sub supporting arm in such a way that it can be turned freely. CONSTITUTION:The clamp 7 and the sub supporting arm 8 are supported on one terminal of the main supporting arm with pins 9, 10 in such a way that they can be turned freely. The clamp 11 is supported on the other terminal of the arm 8 with a pin 12 in such a way that it can be turned freely. Then, a sub tube 23 is held with the clamps 7, 11, and if fixed by tightening with tightening screws 13, 14. The clamps 7, 11 and the arms 6, 8, are fixed with each other by tightening with tightening screws 33, 34, and 35. A horizontal pin 15 is fixed on the other terminal of the arm 6, and the welder 5 is fitted in the pin 15 via a welder connecting member 16, thereby, the supporting device 17 of the welder is formed. In such a way, the supporting device 17 of the welder can be fixed at a stable state even when a pipeline is a straight pipe or a curvature pipe.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a support device for a welding machine.

[Conventional technology]

Figures 3 and 4 show a boiler header l and stub pipes 2a and 2b fixed to the boiler header 1. The boiler header l has a cylindrical shape, and the stub pipe is attached with a chamfered surface on the cylindrical surface. A plurality of holes 3 are bored at predetermined intervals, and each stub tube attachment hole 3 has a tube attachment portion 4a at the end of the stub tubes 2a, 2b. 4b, and the tube attachment portions 4a, 4b and the peripheral edge of the stub tube attachment hole 3 are welded to fix the stub tubes 2a, 2b to the boiler header 1. The spacing between the stub pipe attachment holes 3 is narrow, and when viewed in the longitudinal direction from the end of the boiler header 1, the curvatures of the stub pipes 2a and 2b adjacent to the boiler header l in the circumferential direction are different, making the situation even more complicated. The structure is as follows. For this reason, the work of welding the stub pipes 2a, 2b to the boiler header l is performed manually by skilled workers under difficult conditions.

[Issues to be solved by the invention] However, manual welding work has the problem that the quality is easily influenced by the skill of the worker and that the work is time-consuming. Therefore, in recent years, it has been proposed to automate welding work by using a welding machine that automatically welds pipes. However, when welding the stub pipes 2a and 2b to the boiler header l, Tube 2a. A support device that can support the welding machine in accordance with the curvature of 2b is required. SUMMARY OF THE INVENTION An object of the present invention is to provide a support device for a welding machine that can support a welding machine that welds pipes on pipes of various shapes. [Means for Solving the Problems] The present invention includes a first support arm that can grip a pipe at one end of the main support arm.
The base of the clamp and the base of the secondary support arm are connected to the base of the first clamp.
A clamp and an auxiliary support arm are supported so as to be able to rotate in the same plane, and a base of a second clamp capable of gripping the pipe is attached to the tip of the auxiliary support arm, and the second clamp is attached to the base of the second clamp capable of gripping the pipe. A welding machine connecting member that can be connected to a welding machine is attached to the other end of the main support arm, and the welding machine connecting member that can be connected to a welding machine is attached to the other end of the main support arm so as to be rotatable within the rotating plane of both the clamps. A fixing device is provided for supporting the two clamps, the auxiliary support arm, and the welding machine connecting member so as to fix the rotating support portions thereof. [Function] When performing pipe welding work, the pipe is gripped by the first and second clamps, the welding machine is connected to the welding machine connecting member, and the rotation support part between each member is fixed by the fixture. to support the welding machine. The first clamp is rotatably supported by the main support arm;
Further, since the second clamp is rotatably supported by the sub-support arm which is rotatably supported by the main support arm,
The support device can be fixed to the pipe whether the pipe is straight or bent. Further, since the welding machine connecting member that connects the welding machine is also rotatably supported by the main support arm, the position of the welding nozzle of the welding machine with respect to the outer peripheral surface of the pipe can be adjusted. [Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 (IX0) (/\) and FIG. 2 show one embodiment of the present invention, and as an example, a case will be described in which a welding machine 5 for welding a stub pipe 23 to a boiler header l is supported. At one end of the main support arm 6, the base of the first clamp 7 capable of gripping the stub tube 23 and the base of the sub-support arm 8 are connected by a horizontal pin 9.10, each having a separate center of rotation. The base of a second clamp 11 that is supported so as to be rotatable in the same vertical plane and that can grip the stub tube 23 is attached to the distal end of the sub-support arm 8 by means of a horizontal pin 12.
It is supported so that it can rotate in the same vertical plane as the rotation plane of the ml clamp 7. First clamp 7 and main support arm 6, second clamp 1
1 and sub-support arm 8, sub-support arm 8 and main support arm 6
can be fixed to each other by tightening screws 33, 34, and 35. The first and second clamps 7.11 have tightening screws 13°14
By tightening, it can be gripped and fixed to the stub pipe 23. A pin 15 is fixed horizontally to the other end of the main support arm 6, and a welding machine connecting member 1 can be connected to the welding machine 5 to the pin 15.
6 is fitted so that it can rotate in the same vertical plane as the rotation plane of the first clamp 7, thereby forming a support device 17 for the welding machine. The welding machine connecting member 16 can be fixed to the pin 15 by tightening a tightening screw 18. Further, as shown in FIG. 2, each of the pins 9. A protrusion 1 extending at right angles to IO, 12, 15 and in the horizontal direction (parallel to the tangent of the boiler header l)
9 is formed. Next, the configuration of the welding machine 5 will be briefly described. The welding machine 5 includes a support 20 that has a notch (not shown) extending in the radial direction of the stub pipe 23 when viewed from above and can be fitted onto the stub pipe 23, and a support body 20 that has a substantially U-shape when viewed from above. 2
The turntable 21 is rotatably supported by the support body 20, and a welding nozzle 22 is attached to the turntable 21. The support body 20 is provided with a turning motor 24 for rotating the turntable 21, and the support body 20 is provided with a turning motor 24 for rotating the turntable 21.
0 is connected to a lifting motor 26 provided on the frame 25 via a lifting mechanism (not shown). Furthermore, a connecting member 28 that can be connected to the welding machine connecting member 16 via a position adjustment mechanism 27 is attached to the upper part of the frame 25. The position adjustment mechanism 27 allows the connection member 28 to move in the axial direction of the boiler header l by rotating the adjustment screw 29.
Further, by rotating the adjusting screw 30, the connecting member 28 is moved in the tangential direction of the boiler header l. As shown in FIG. 2, the connecting member 28 extends parallel to the tangent of the boiler header I on its upper surface, and has the welding machine connecting member I.
A groove 31 that can fit into the protrusion 19 of B is formed, and after the protrusion 19 and the groove 31 are fitted, the connecting member 28
The connecting member 28 can be fixed to the welding machine connecting member 16 by tightening a tightening screw 32 provided on the side surface. The procedure for installing the welding machine 5 will be described below. When installing the welding machine 5, first, a support device positioning jig (not shown) on which the welding machine connecting member 16 can be placed is installed.
is temporarily installed on the outer circumferential surface of the boiler header l, and the support device 17 of the welding machine is temporarily placed on the support device positioning jig so that the lower surface of the welding machine connecting member 16 comes into contact. The axial dimension of the stub pipe 23 of the jig is equal to the dimension from the outer peripheral surface of the boiler header l to the lower surface of the welding machine connecting member 16 when the welding machine 5 is used. Next, the first and second clamps 7.11 are attached to the stub pipe 23.
After fixing the first and second clamps 7.11 to the stub pipe 23 by tightening the clamping screws 13.14, the jig is removed. At this time, the first clamp 7 is rotatably supported by the main support arm B by the pin 9, and the second clamp 11 is rotatably supported by the tip of the sub-support arm 8 by the pin 12. Therefore, as shown in FIG. It can be fixed in a stable state. After the jig is removed, the groove 31 of the connecting member 28 of the welding machine 5 and the protrusion 19 of the support device 17 are fitted (see FIG. 2), and the support 20 of the welding machine 5 and the turn are fitted. Fit the table 21 onto the stub pipe 23, further tighten the tightening screw 32, and connect the connecting member 28 to the welding machine connecting member 16.
After adjusting the position of the welding nozzle 22 with respect to the outer peripheral surface of the stub pipe 23, the tightening screw 18 is tightened to fix the position of the welding machine connecting member 16. As described above, once the welding machine 5 is connected and fixed to the support device 17, fine positional adjustment of the welding nozzle 22 with respect to the outer peripheral surface of the stub pipe 23 is performed by the position adjustment mechanism 27 and the lifting motor 2B as necessary. , the turning motor 24 is driven to turn the welding nozzle 22 together with the turntable 21, welding is performed along the circumferential direction of the stub pipe 23, and the stub pipe 23 is fixed to the boiler header l. When the welding work is completed, in the opposite manner to the above-described procedure, loosen the tightening screws 18.32, release the connection between the welding machine connecting member 16 and the connecting member 28, and remove the welding machine 5 from the support device 17. Further, the tightening screws 13 and 14 are loosened, and the stub tube 23 is gripped by the first and second clamps 7 and 11 by M, and the support device 17 is removed from the stub tube 23. Note that the support device for a welding machine of the present invention is not limited to the above-described embodiments, but can be used for welding various types of piping other than stub pipes, and can be used for welding work for various types of piping other than stub pipes.
It goes without saying that various changes may be made without departing from the spirit of the present invention, such as using levers or the like instead of tightening screws as fixing devices for each rotation support portion of the second clamp. [Effects of the Invention] As explained above, according to the welding machine support device of the present invention, various excellent effects as described below can be achieved. (1) At the other end of the main support arm that is connected to the welding machine, a first clamp and a sub-support arm that rotatably supports a second clamp are each rotatably supported. Therefore, whether the pipe is straight or bent, the support device of the welding machine can be stably fixed to the pipe, and there is no need to prepare a support device for each shape of the pipe. (Since the welding machine connecting member that connects the two welding machines is also rotatably supported by the main support arm, the position of the welding nozzle of the welding machine with respect to the outer circumferential surface can be easily adjusted.

[Brief explanation of drawings]

Figure 1 (a) Q\) is a side view showing the device of one embodiment of the present invention fixed to stub pipes of various shapes;
The figure is a detailed view of the welding machine connecting member as seen from the A direction in FIG. In the figure, 5 is a welding machine, 6 is a main support arm, 7 is a first clamp, 8 is a sub-support arm, 9, 10.12° 15 is a pin, 11 is a second clamp, 1B is a welding machine connection member , 17
is a support device for a welding machine, 13, 14, 18.33°34.
35 is a tightening screw (fixing tool), 22 is a welding nozzle, 23
28 shows a stub pipe (piping) and a connecting member.

Claims (1)

[Claims] 1) At one end of the main support arm, support the base of a first clamp capable of gripping piping and the base of a sub-support arm so that the first clamp and sub-support arm can rotate within the same plane. and supporting the base of a second clamp capable of gripping the pipe at the tip of the sub-support arm so that the second clamp can rotate within the rotation plane of the first clamp, A welding machine connecting member connectable to a welding machine is supported at the other end of the main support arm so as to be rotatable within the rotation plane of both the clamps, and the welding machine connecting member is connected to the two clamps, the sub-support arm, and the welding machine connecting member. 1. A support device for a welding machine, characterized in that a fixture is provided for fixing each rotating support portion of the welding machine.