A clamping tool and a method for argon tungsten arc welding using the tool

A tooling and clamping technology, applied in arc welding equipment, application, welding equipment and other directions, can solve the problems of distortion, low straightness, repeated clamping and repeated shape correction of workpieces, etc., to reduce heat input and ensure shape and position tolerances. requirements, less surface oxidation, and the effect of the extent of the heat-affected zone

Active Publication Date: 2019-04-09
BEIJING INST OF CONTROL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem of the present invention is: to overcome the deficiencies of the prior art, to provide a clamping tool and a method for argon tungsten arc welding using the tool, to solve the problems of low straightness after welding, multiple clamping during welding and Problems such as repeated correction of workpiece distortion

Method used

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  • A clamping tool and a method for argon tungsten arc welding using the tool
  • A clamping tool and a method for argon tungsten arc welding using the tool
  • A clamping tool and a method for argon tungsten arc welding using the tool

Examples

Experimental program
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Effect test

Embodiment 1

[0061] Pre-weld cleaning of the pipeline to be welded: Clean the pipeline to be welded to ensure that there is no oxide layer and other redundant components on the surface. The cleaning is carried out in the following order:

[0062] The first step of degreasing: soak the inner and outer surfaces of the pipeline to be welded with aviation gasoline for 30-40 minutes, scrub the outer surface with gasoline, then dry it, and then use the pump to circulate the metal degreasing agent solution for chemical degreasing;

[0063] The second step of hot water and cold water washing: wash the inner and outer surfaces of the workpiece with hot water not lower than 50°C, and then wash the parts with running tap water, and the cleaning time should not be less than 15s each time;

[0064] The third step is pickling or alkaline cleaning: stainless steel and titanium alloy need to be equipped with HF (40 ~ 60g / L) and HNO 3 (160~260g / L) solution, aluminum alloy needs to be equipped with lye and ...

Embodiment 2

[0092] Same as Example 1, the difference is as follows:

[0093] The welding material is aluminum alloy pipeline (outer diameter Φ12 / inner diameter Φ10), the center matching hole on the jacket and the base tooling is Φ12, and the diameter is Φ2.4 tungsten pole, the spot welding parameters are divided into 7 sections, the first The welding current of the first stage is 10A, the speed is 0r / min, and the welding time is 0.1~1s; the welding current of the second stage is 5A, the speed is 8r / min, and the welding time is set to 1.88s; the welding current of the third stage is 10A, and the speed is 0r / min; the welding current of the fourth section is 5A, the speed is 8r / min, and the welding time is set to 1.88s; the welding current of the fifth section is 10A, and the speed is 0r / min; the welding current of the sixth section is 5A, and the speed is 8r / min , set the welding time to 1.88s; the welding current in the seventh section is 10A, the speed is 0r / min, and the welding time is ...

Embodiment 3

[0097] Same as Example 1, the difference is as follows:

[0098] The welding material is titanium alloy pipeline (outer diameter Φ4 / inner diameter Φ2.4), the center matching hole on the jacket and the base tooling is Φ4, the diameter is Φ1 tungsten pole, and the spot welding parameters are divided into 5 sections, the first The welding current of the first section is 20A, the speed is 0r / min, and the welding time is 0.1~1s; the welding current of the second section is 1A. The rotation speed is 6r / min, and the welding time is set to 3.3s; the welding current in the third section is 20A, and the rotation speed is 0r / min; the welding current in the fourth section is 1A. The rotation speed is 4r / min, and the welding time is set to 3.3s; the welding current in the fifth stage is 20A, and the rotation speed is 0r / min; the circumference welding parameters, the welding speed is set at 6r / min, the gas flow rate is 25L / min, and the tip of the tungsten electrode is away from the workpiec...

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Abstract

The invention relates to a mounting and clamping tool and a method for argon tungsten-arc welding by use of the mounting and clamping tool. The method ensures small deformation of pipeline welding and belongs to the technical field of welding processes. A spot welding, circumferential welding and follow-up heat treatment universal integrated tool is designed according to products with different external diameters, mounting, clamping and positioning can be conveniently performed, and meanwhile, surface oxidation of a weld joint, repeated mounting and clamping of the tool, and product deformation are avoided during processing. In the method, 2-4 point equipartition is performed on spot welding parameters through welding programming for symmetric programming; and the circumferential welding process comprises repeated subsection, current from the first section to the last section is in the mode of waveform current, and the average current adopts an inclined mode. Through the programming method, the depth of fusion can be well controlled by the programming method, heat input is reduced to the minimum degree on the premise of guaranteeing the welding depth, the uniformity of the fusion depth is realized, and the ranges of surface oxidation and a heat affected zone are reduced to the utmost extent.

Description

technical field [0001] The invention relates to a clamping tool and a method for argon tungsten arc welding by using the tool. The method can reduce the deformation of pipeline welding and belongs to the technical field of welding technology. Background technique [0002] Pipeline welding generally adopts argon tungsten arc welding method, which has the advantages of convenient welding, high efficiency, and good quality. However, due to the low arc energy density in the welding process of long straight pipes, the welding process requires a large heat input to achieve Its larger welding depth, larger melting width, and larger heat-affected zone lead to larger welding stress, more serious welding deformation, and poor straightness. At present, argon arc welding mainly adopts methods such as using heat-dissipating fixed tooling during the welding process, controlling the assembly gap, or adopting methods such as correcting the shape after welding, such as the anti-deformation m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K37/053B23K9/32B23K9/167B23K101/06
CPCB23K9/167B23K9/32B23K37/0533B23K2101/06
Inventor 王文平赵连清张志伟冯豪申坤张宽贾春林
Owner BEIJING INST OF CONTROL ENG
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