welding process

Abstract

The invention proposes a welding process, which includes the following steps: using welding equipment to locate the first workpiece and the second workpiece; using swing welding at the two largest gap points between the circular end surface and the cylindrical peripheral surface; Select an arc starting point between the cylindrical peripheral surfaces, and the arc starting point corresponds to the position between the two maximum gap points on the corresponding circle of the circular end surface; the arc starting point is used for welding, and the welding equipment is used at the same time. The center line of the workpiece is the shaft synchronously rotating the first workpiece and the second workpiece counterclockwise. The welding process includes two weldings. The first welding adopts swing welding, and the second welding is performed immediately after the first welding. Through the above design, the present invention uses swing welding to replace the fixed position welding in the existing technology to weld the largest gap point, which can reduce welding cracks and lack of fusion caused by insufficient heat input and stress concentration during the welding process.

Description

technical field [0001] The invention relates to the field of fusion electrode arc welding technology, in particular to a welding process. Background technique [0002] Electric welding machine technology has developed rapidly, and has now fully entered the era of digital control. In the existing process, when carbon steel pulse welding using digital welding machine is applied to melting electrode arc welding, for example, when melting electrode arc welding is performed on workpieces with shock absorbers or other joint forms, due to the unfused base metal at the welding point and welding cracks, resulting in poor welding such as welding cracks at the maximum gap of the workpiece when the first weld is welded. Furthermore, taking the molten electrode arc welding of chrome-plated 45# steel and Q345 welding workpiece as an example, during the welding process, due to the small heat input, the base metal will not be fully fused, or the weld seam will be caused by the large heat i...

AI Technical Summary

Problems solved by technology

In the existing process, when carbon steel pulse welding with digital welding machine is applied to metal arc welding, for example, when metal arc welding is performed on shock absorbers or other workpieces in the form of joints, due to the lack of fusion of the base metal at the welding point And welding cracks, resulting in poor welding such as welding cracks in the largest gap of the workpiece when the first weld is welded

Furthermore, taking chrome-plated 45# steel and Q345 welding workpiece as an example, during the welding process, due to the small heat input, the base metal will not be completely fused, or due to the large heat input, the weld seam will The stress and strain at the place are relatively large, so it is easy to produce welding cracks at the position of the liquid film at the P and S segregation. The welding cracks are also independent of the welding equipment and mainly affected by the welding process.

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