The development trend of stud welding technology
Stud welding technology of the future development trend is mainly to expand application scope, improve the level of stud welding automation and the upgrading of welding equipment. The hardware is the key to the development of the thyristor controlled welding power supply upgrade for inverter welding power source.
The inverter using switch element has two kinds of fast thyristor and IGBT. The inverter frequency is low, a few kHZ, but the output power is larger; The latter frequency is higher, more than 10 kHZ, but the output power is low.
From the dynamic characteristic of power source, volume weight into consideration, such as IGBT should be the development direction. Has been put into use the inverter type stud welding power source of the output current of 1000 a, weldable phi 12 mm stud, mainly used in the automotive industry.
As for the development direction of welding torch, is the electronic control. Welding torch is mostly through the spring scale at home and abroad to control the rise and fall of stud, the controllability is quite limited.
If the step motor or servo motor control, can according to the technological requirements accurately control the movement of the stud, welding quality is more guarantee. Especially the large diameter of bridge maintenance required long nail of flat welding rod welding, transverse welding and welding, is to use the advanced welding torch. In fact, some countries have developed this kind of welding torch, which has been applied to the welding engineering.