The laminated material of motor stator is generally made of cold-rolled or hot-rolled silicon steel sheets, which have excellent weldability. If laser welding is used, compared to tungsten inert gas arc welding, not only does it improve the production rate, but it also improves the hygiene and safety conditions of the production environment, eliminating the harm of strong arc light, ozone, and other harmful oxides to human health during argon arc welding. And it is also possible to use computer-controlled dual or four machines, or single machine multi head output laser beams, placed around the outer circular wall of the stator. This way, the required number of welds for stator tightening can be completed by the welding machine working once or twice, which can greatly reduce deformation and save processing time. Below is an introduction to the application of laser welding equipment in the operation of motor stator cores.
In the structure of an electric motor, the iron core (magnetic core) plays a crucial role in adding magnetic flux to the inductor coil, completing the maximum conversion of electromagnetic power. The iron core is usually composed of a stator and a rotor combination. The welding of the motor rotor shaft and rotor shaft pressure ring is generally carried out using CO2 gas maintenance welding or tungsten inert gas arc welding for the circumferential welding seam before the motor rotor shaft and pressure ring. The welding produces a large deformation and a large heat affected zone, and the heat generated by welding can also affect the magnetic steel inside the assembled motor body. The method of using laser welding equipment is characterized by energy concentration, high density, high heating efficiency, and fast speed, resulting in small deformation of the base material and minimal heat impact on the non melting zone metal.
The traditional welding process of the motor iron core has defects, including appearance defects and rough welds. High requirements for worker operation and significant human disturbance. The laminated material of motor stator is generally made of cold-rolled or hot-rolled silicon steel sheets, which have excellent weldability. If laser welding is used, compared to tungsten inert gas arc welding, not only does it improve the production rate, but it also improves the hygiene and safety conditions of the production environment, eliminating the harm of strong arc light, ozone, and other harmful oxides to human health during argon arc welding. And it is also possible to use computer-controlled dual or four machines or single machine multi head output laser beams, which are placed around the outer circular wall of the stator. This way, the required number of welds for stator tightening can be completed by the welding machine working once or twice, which can greatly reduce deformation and save processing time.
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