Dynamic calibration method for welding machine output display value

Abstract

The invention discloses a dynamic calibration method for a welding machine output display value. The dynamic calibration method includes the steps that the true value and measured value of welding machine output parameters are acquired, the true value refers to the actual output parameter value of a welding machine, and the display value refers to the output parameter value displayed by a welding machine display module; and a fitted curve of the true value and the display value is obtained according to the true value and the display value of the at least one set of the output parameters acquired at the same point of time, the display value is calibrated according to the fitted curve, and the display value is further updated on the display module. By adoption of the dynamic calibration method, the welding machine output display value can be made more accurate within a wide range, the welding quality is guaranteed, feasibility of the welding process is improved, correction time of the welding machine can be shortened, the maintenance frequency is greatly lowered, production efficiency is improved and cost is reduced.

Description

technical field [0001] The invention belongs to the field of welding machine output correction, and in particular relates to a dynamic correction method for welding machine output and display values. Background technique [0002] The welding machine (welding power supply) used for a long time in the prior art has the problem that the output current and output voltage display value of the welding machine do not match the real value during the welding process, that is, the output error problem of the welding machine itself. There are two main reasons for the above problems: First, during the long-term use of the welding machine, due to the thermal effect caused by the internal shunt resistance and voltage dividing resistance of the welding machine power supply passing through the current, reciprocating use is equivalent to performing multiple heat treatments on the resistance material, so the resistance The resistivity and geometric dimensions (length, cross-sectional area, et...

AI Technical Summary

Problems solved by technology

However, this method has the following disadvantages: first, the standard ammeter and voltmeter used by many manufacturers also have certain errors, which affects the calibration of the welding machine; second, returning to the factory for maintenance wastes a lot of time, greatly affecting production efficiency and cost; third , this method can only correct the current value and voltage value at a certain point output by the welding machine and its vicinity, which is a static correction, but cannot simultaneously correct the current value and voltage value within the entire welding process range

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