The strength of hand-held laser welding, first understand the factors affecting the strength of

 

  welding: Is the purpose of the welding in order to make the form enough strength of

 

  connections between components, welding strength is the use of the basic problems of       weldability analysis, factors influencing the welding strength of the main strong science and     material two aspects,

 

  the influence of mechanical aspects include the influence of welding defects, joint shape integrity, residual force and deformation of welding, material aspect, The thermal cycle caused by welding causes the microstructure change of the material, and the correction after welding heat treatment causes the material change.

 

  Welding thermal process: usually in the material connection zone (welding zone), in the local thermal melting state, in order to make the material to form welding conditions, highly concentrated heat input, welding heat source butt zone during the welding process to heat, so that it melts and then in the process of forming weld and welding joint.

 

  Welding depth, for the material after comparison, weld depth and weld pool formation process whether spatter hole slag inclusion is reflected in the welding strength. Laser welding can use continuous pulse laser beam welding, the welding principle of laser thermal welding workpiece surface makes the metal surface to heat between melting point and boiling point. The light energy absorbed by the metal surface is converted into heat energy, which causes the metal surface temperature to rise and melt, and then transmits the heat energy to the metal interior in the way of thermal conduction.

 

  The melting area is gradually expanded, and the welding spot or weld is formed after cooling. When continuous welding is used for work, the continuous gap of the welded parts is almost no, and the welding depth to width ratio is large, the welding deformation is small, and the accuracy is high.