Laser welding is one of the important components of laser material processing. Laser welding is a kind of precision welding technology that uses high energy beam as heat source.
It mainly heats the workpiece surface by high energy laser beam, and the heat diffuses from the material surface to the interior.
By adjusting the parameters of the laser pulse, the corresponding material is melted and a specific molten pool is formed.
Stainless steel materials are widely used in the manufacture of various finished products,
and the welding of stainless steel sheet has become an important process in the production and manufacturing process.
However, due to the characteristics of thin plate stainless steel itself, it is difficult to welding, and it has become a difficult welding problem in the field of thin plate stainless steel.
Traditional welding machining stainless steel plate has a big problem, stainless steel plate due to its thermal conductivity is very small,
only about a third of the normal low carbon steel, the constraint degree is smaller, so once the local heating and cooling in the process of welding,
will form the non-uniform stress and strain, weld longitudinal contraction produce a certain pressure to the outer edge of the stainless steel sheet,
Once the pressure of the traditional welding machine is too large, it will cause the wave deformation of the workpiece,
which will not only affect the beauty but also affect the quality of the workpiece, in addition to the problem of over-burning and burning through.
The appearance of fiber laser welding machine is a good solution to this problem, laser welding is the use of high energy laser pulse on the material in a small area of local heating,
laser radiation energy through heat conduction to the material internal diffusion, the material will be melted to form a specific pool.
High welding depth-width ratio, small weld width, small heat affected zone, small deformation, fast welding speed, smooth weld, beautiful,
no treatment or simple treatment after welding, high weld quality, no pores, can be precisely controlled, small focusing spot,
high positioning accuracy, easy to realize automation. Laser welding machine with a number of advantages are gradually replacing the traditional sheet welding market.
