Welding method for intermediate frequency inverted resistance welding machine

Abstract

The invention discloses a welding method for an intermediate frequency inverted resistance welding machine. The intermediate frequency inverted resistance welding machine comprises a main controller, a human-computer interface, an inverter module, a voltage transforming and rectifying circuit, an electric current collecting device and a voltage sensor. According to the intermediate frequency inverted resistance welding machine, the working frequency of the system is 1800 HZ, the sampling frequency and the control accuracy are improved unprecedentedly, meanwhile the welding transformer size is reduced, welding parameters are adjusted according to actual conditions of contact resistors to be performed point welding, the electric current and the time are intelligently controlled, and cold joints and the like are effectively avoided.

Description

technical field [0001] The invention relates to a welding method for a medium-frequency inverter resistance welding machine. Background technique [0002] At present, most of the resistance welding machines on the market use the method of AC-DC-AC-DC conversion for welding. The main controller controls the inverter module to convert DC into AC and transmit it to the transformer and rectifier circuit. And the rectification circuit transforms and rectifies the AC power converted by the inverter module into DC power for welding by welding machines. Most of the welding machines work at a frequency of 1000HZ. This frequency of welding machines leads to a relatively large volume of the welding transformer, and sampling The frequency and control accuracy are low, and most intermediate frequency inverter welding machines weld directly according to the set parameters, without actual tracking, resulting in false welding of solder joints. Contents of the invention [0003] The techn...

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Problems solved by technology

[0002] At present, most of the resistance welding machines on the market use the method of AC-DC-AC-DC conversion for welding. The main controller controls the inverter module to convert DC into AC and transmit it to the transformer and rectifier circuit. And the rectification circuit transforms and rectifies the AC power converted by the inverter module into DC power for welding by welding machines. Most of the welding machines work at a frequency of 1000HZ. This frequency of welding machines leads to a relatively large volume of the welding transformer, and sampling The frequency and control precision are low, and most intermediate frequency inverter welding machines weld directly according to the set parameters, without actual tracking, resulting in false welding of solder joints

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