A refined multifunctional welding system and its control method

Abstract

A refined multifunctional welding system is provided with a welding module, a sampling unit arranged on the welding module, a power module electrically connected with the sampling unit and the welding module, and a control module electrically connected with the sampling unit and the power module. The control module mainly comprises a main control circuit and a man-machine interaction control circuit, wherein the main control circuit is used for outputting pulse width modulation control signals and controlling the other modules in the system, and the man-machine interaction control circuit is connected with the main control circuit and used for mode selection and parameter adjustment. A small current stabilizing module is connected between the control module and the welding module in series and mainly comprises a direct-current power source, a current-limiting resistor and a control switch, wherein the direct-current power source, the current-limiting resistor and the control switch are sequentially connected. The switch frequency above 60 KHZ is adopted in the power module, so that the refined multifunctional welding system is higher in dynamic response speed and control accuracy and compatible with multiple welding functions better, and a control method of the refined multifunctional welding system has the same advantages.

Description

technical field [0001] The invention relates to a digital welding system, in particular to a refined multifunctional welding system and a control method thereof. Background technique [0002] At present, inverter welding machines have been widely used in the welding operations of various non-ferrous metals and their alloys in various industries. [0003] The inverter welding machine is favored by users for its light weight, small size, low production consumption, remarkable energy saving effect and excellent welding process performance. In the digital multi-functional welding system, the digital interleaved BUCK type pulse width modulation multi-functional inverter welding machine and the digital high-frequency multi-functional inverter argon arc welding machine both use digital control chips to control the welding power supply, and integrate various welding processes into one Integrate to realize the value-added application of one machine with multiple functions. However,...

AI Technical Summary

Problems solved by technology

However, once it involves small current DC fine welding, such as thin plate welding and welding of small electronic components, the current multi-functional welding system is not easy to detect because the welding current is too small (less than 3 amperes, generally less than 1 ampere or even 0.5 amperes). , resulting in unstable power supply, which ultimately results in incompatibility with the low-current welding machine process or the unsatisfactory low-current welding effect

[0004]In view of the high cost of adding precision measuring instruments to the multi-functional welding system to deal with the current detection in small current welding

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