Situation
One
of the core components of new energy vehicles is drive motor, in order to
achieve the new energy vehicles in batches of production, improve the motor
stator’s production efficiency and quality becomes very necessary.
General
solution
The
stator of motor is made by stacking silicon steel sheets. Generally, welding is
used to weld several welds along the axial direction of the stack of stator, so
that the silicon steel sheets can be firmly connected together. This will not
only make the process simple, but also increases the insulation resistance
between the stator silicon steel sheets and increases the effective permeance
cross section, thus improving the quality of the motor.
Traditional
manual arc welding due to small heat, large heat affected zone, welds are not smooth
and can't be automated, low efficiency and other factors, now rarely used. TIG
welding arc stability because of the arc, good elasticity, without filling the
metal, welding parameters easy to control, weld smooth and clean, no splash and
other factors, widely used. However, due to silicon steel sheet with high
silicon content, so it conduces poor weldability, easy to crack after welding and hard to weld.
So
in recent years the use of laser welding has become a very promising alternative.
Laser welding
solutions
Laser
welding is the laser output of high power density of the laser beam through the
focus, so that the spot is small, energy concentration, high density, heating
efficiency, then the welding metal deformation is small. Because silicon steel
is a silicon content higher, lower carbon content of ferrosilicon alloy, its
low thermal conductivity, thermal sensitivity, is conducive to rapid heating
with a laser beam melting, it can form a good connection weld.
Zhejiang
Jinggong Robotics&Intelligent Equipment Co., Ltd. is a professional
manufacturer of high-power laser applications. It adopts imported high-power
laser to carry the welding head and adopts Siemens 840D CNC shaft to realize
the one-time welding of the whole stator.
Compared
with the traditional argon arc welding, the efficiency is improved by 5-8
times, the weld quality is close to perfect and the heat affected zone is very
small. The entire automatic laser welding unit can really achieve the stator
chip assembly, compression, laser welding and automatic cutting the entire
process automatically. Greatly improving the new energy automotive motor stator
production efficiency and quality, and ultimately for the realization of new
energy vehicles in batches, high-quality production to provide the perfect
solution.
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