JPS61245977A - Torch for automatic welding - Google Patents

Abstract

PURPOSE:To provide the titled torch for automatic welding simplifying the control with reducing of the degree of freedom as well as simplifying the mechanism for torch turning by constituting so as to turn around the torch shaft center with bending a torch. CONSTITUTION:A filler wire 33 is guided upto the tip of a torch by a tube guide 35 and curve tube 34. The feeding to the filler wire 33 is performed via power source cable 13, inner tube 16 and conductive tube 30 and a shielded gas is spouted from the tip of the torch 6 through a passage 21 and space 31. In case of performing the peripheral fillet welding of a branch tube 8, a rotary body 11 is turned once per round by motor 26 with moving the torch 6 adequately in the directions, X, Y, Z. As for the torch unit 12 plural units having different degrees of freedom are prepared and adequately selected according to the welding conditions.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic welding torch used when performing circumferential welding and fillet welding with an automatic welding device.

[Prior Art] As shown in FIG. 3, a conventional automatic welding device has a frame 1 that can move in the X direction, a slider 2 that can move in the Y direction, and a slider 3 that can move in the X direction. possible,
Further, a slider 4 is provided on the slider 3 so as to be movable in the Z direction, a torch support 5 is provided on the slider 4 so as to be rotatable in the α direction, and a torch 6 is provided on the torch support 5 so as to be rotatable in the β direction. , When fillet welding the branch pipe 8 to the main pipe 7 using the automatic welding device, move the slider 2° 3.4 (in some cases, the frame F) in the Y, X, and Z directions, and move the torch support 5, The torch 6 is rotated in the α and β directions.

[Problems to be Solved by the Invention] In the conventional automatic welding described above, two degrees of freedom are required for movement around the torch in the α direction and β direction, and the mechanism around the torch is complicated and the control program is also difficult. It's complicated.

In view of these circumstances, the present invention aims to simplify the mechanism surrounding the torch and reduce the degree of freedom to simplify control.

[Means for Solving the Problems] The present invention provides a method in which a rotating body is rotatably attached to a torch body, a torch unit bent in a desired state is detachably attached to the rotating body, and a motor is attached to the torch body. , the rotating body can be rotated around the torch axis by the motor.

[Function] Since the torch is bent so that it can be rotated around the torch axis, for example, when performing circumferential fillet welding, the torch unit only needs to be rotated once during the circumference, and the The rotation can be controlled by one axis.

[Example] The present invention will be described in detail below with reference to the drawings.

First, to explain the outline in FIG. 1, 6 is a torch, the torch 6 is supported by a torch holder 9, and the torch 6 is connected to a torch body 10 and a torch body 10.
The torch unit 12 is comprised of a rotary body 11 rotatably provided on the rotary body 11 and a torch unit 12 detachably attached to the rotary body 11.

In the figure, 7 is a main pipe, 8 is a branch pipe, 13 is a power cable, and 14 is a gas hose.

Next, details of the torch 6 will be explained with reference to FIG.

The base pipe 15 has a two-layer structure in which the inner pipe 16 is conductive and the outer pipe 17 is insulating. A conduit liner 19 is fixed to the base end of the base pipe 15 with a nut 18 and extends from the funduit liner 19. A guide tube 20 is inserted through the inner tube 16, a shield gas passage 21 is formed around the guide tube 20, and the gas hose 14 is communicated with the passage 21. Further, the lower end of the inner tube 16 has a small diameter to form a shaft portion 22, and the insulating rotating body 11 is rotatably fitted into the shaft portion 22 via a bearing 23.

A gear 24 is fixed to the upper part of the rotating body 11, and a cap nut 25 is provided at the lower end so that it cannot be removed.

A motor 26 is attached to the base tube 15, and a binion gear 27 fitted on the motor output shaft is meshed with the gear 24.

Further, the torch unit 12 is attached to the rotating body 11 with a cap nut 25. The torch unit 12 is bent so that the torch tip forms a required angle depending on the welding conditions.

A screw 29 is cut into the base end of the outer tube 11, and the screw 29 is screwed into the cap nut 25. Insert the conductive tube 30 into the outer tube 11 so that a required space m31 is formed between both tubes, and install insulating spacers 32 at required positions evenly spaced around the circumference to hold the conductive tube 30 floating. do.

The upper end of the conductive tube 30 is electrically in-contacted and fitted into the shaft portion 22, and the lower end is in contact with the filler wire 33. A curved tube 34 is inserted into the conductive tube 30 so that the upper end of the curved tube 34 overlaps the lower end of the tube guide 35 so that the filler wire 33 is continuously guided by the tube guide 35 and the curved tube 34. . Further, the space 31 communicates with the passage 21 through a communication hole 36 formed in the shaft portion 22, and serves as a passage for shielding gas.

Next, the operation will be explained.

The filler wire 33 is guided to the tip of the torch by a tube guide 35 and a curved tube 34, and power is supplied to the filler wire 33 by the power cable 13 and the inner tube 1 as described above.
6. The shielding gas is ejected from the tip of the torch 6 through the passage 21 and the space 31.

When performing circumferential fillet welding of the branch pipe 8, move the torch 6 to X1Y1
The rotating body 1 is moved by the motor 26 while being moved appropriately in the Z direction.
1 should be rotated once per revolution.

Incidentally, a plurality of torch units 12 having different bending degrees may be prepared, and the torch unit 12 may be appropriately selected according to the welding conditions.

[Effects of the Invention] As described above, according to the present invention, the degree of freedom around the torch only needs to be one degree of freedom of rotation around the torch axis, and the structure is extremely simple and control is easy.

[Brief explanation of the drawing]

FIG. 1 is an external view of an embodiment of the present invention, FIG. 2 is a detailed front sectional view of the same, and FIG. 3 is a schematic diagram of a conventional example. 6 is a torch, 10 is a torch body, 11 is a rotating body, 12 is a torch unit, 24 is a gear, and 21 is a pinion gear. Patent application Hitoishikawajimaban@Heavy Industries Co., Ltd. ×

Claims (1)

[Claims] 1) A rotating body is rotatably attached to the torch body, and a torch unit bent in a desired state is detachably attached to the rotating body, a motor is attached to the torch body, and the rotating body is rotated around the torch axis by the motor. An automatic welding torch characterized by being configured so that it can be rotated.