Mounting and clamping tool and method for argon tungsten-arc welding by use of mounting and clamping tool
A tooling and clamping technology, applied in arc welding equipment, applications, welding equipment, etc., can solve problems such as low straightness, distortion, multiple 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
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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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