Legal Counsel: Mr. Zhao Jianying
According to relevant data analysis: if the weight of the vehicle is reduced by 10%, the fuel efficiency can be increased by 6% to 8%; for every 100 kg of vehicle quality, the fuel consumption of 100 kilometers can be reduced by 0.3 to 0.6 liters. Replacing traditional steel-made cars with aluminum can reduce vehicle weight by 30 to 40 percent.
Tesla's Model S contains 250 patents. Its all-aluminium body combines lightweight and high strength characteristics, in addition to the body, most of its front and rear suspension materials are also made of aluminum. From a manufacturing point of view, this car is produced in a fundamentally different way than other cars. Through the following Tesla factory real production video, you will learn more about the production process of Model S cars from raw material selection, stamping, welding, painting to final assembly!
Because the aluminum alloy material is more sensitive to heat, if the traditional welding process is used, there will be a problem of material strength reduction, and because of the easy deformation of heat, the dimensional accuracy of the all-aluminum body assembly is not easy to control. So, how did the Tesla factory overcome the difficulties of the aluminum alloy welding process?
Tesla welding workshop detailed video:
The welding process of Tesla factory is cmT cold metal transition technology and DeltaSpot resistance spot welding technology.
In 2005, Vonex austria introduced cmT (Cold metal Transfer) cold metal transition technology, which realized the connection of steel and aluminum for the first time in the world, and the CMT process is a "cold transition" compared to traditional MIG/MAG welding. The DeltaSpot resistance spot welding process, a new technology developed for aluminum welding, has a high degree of process reliability and achieves 100% repeatability per resistance solder joint: the base metal and electrode are protected by electrode strips, which move between the electrodes and the base metal to be joined to achieve a continuous welding process, ensuring a constant level of mass in multiple shifts.
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Source: Fronius (China)
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