The crimping parameters and testing basis shall meet the requirements of QC/T29106. The closed height is continuously adjustable, the precision can reach 0.03 mm, the transmission structure is simple, the operation is stable and reliable, and the work is only performed at the moment of crimping in the working state. Save power, unique overload protection function. Nominal pressure 80 kN, adjustment 2 mm (0.079 in), stroke 40 mm (1.575 in). The contact resistance is large, and if the mechanical strength cannot be guaranteed, soldering operation is required; the production efficiency is low, and electric welding requires flux and solder; the welding process is polluted, the resistance of the welding point is large, and the phenomenon of false welding is prone to occur.