Welding technology

Abstract

The invention provides a welding technology. The welding technology comprises the following steps that a first workpiece and a second workpiece are positioned through welding equipment; two maximum clearance points between a circular end face and a cylindrical peripheral face are subjected to weaving welding; an arcing point is selected between the circular end face and the cylindrical peripheralface and corresponds to the position, between the two maximum clearance points, of the corresponding circle circumference of the circular end face; and welding is conducted from the arcing point, meanwhile, the welding equipment is utilized to synchronously and counterclockwise rotate the first workpiece and the second workpiece by taking the center line of the first workpiece as an axis, the welding process comprises two passes of welding, first pass of welding adopts weaving welding, and second pass of welding is conducted immediately without pause after first pass of welding. Through the design, the welding technology utilizes weaving welding to replace fixed position welding in the prior art to weld the maximum clearance points, and defects such as welding cracks and non-fusion causedby insufficient heat input and stress concentration in the welding process can be reduced.

Description

technical field [0001] The invention relates to the field of metal arc welding technology, in particular to a welding technology. Background technique [0002] Welding machine technology has developed rapidly, and has now fully entered the era of digital control. In the existing process, when pulse welding of carbon steel with a 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 welding cracks and other poor welding of the workpiece at the largest gap 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 relativ...

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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