CN-116604158-B - Inverter type welding power supply, electric welding machine and welding method

CN116604158BCN 116604158 BCN116604158 BCN 116604158BCN-116604158-B

Abstract

An inverter welding power supply selects a resistance welding mode through a mode and parameter setting module, acquires an output signal of the rectification output module through a signal acquisition module, and the control module controls the output current of the rectification output module according to the resistance welding mode and the states of the electrode and the workpiece, applies pressure to the workpiece through the resistance welding electrode, and welds the workpiece through the output current and the pressure. The inverter type welding power supply, the electric welding machine and the welding method can finish resistance welding by only adding the resistance welding electrode on the basis of the traditional arc welding power supply, are convenient to operate, low in cost and wide in application, and have high practical value.

Inventors

LI SHUHUI
HUANG LINGFENG
GAO DONGFENG
WANG MIN

Assignees

上海广为焊接设备有限公司

Dates

Publication Date: 20260512
Application Date: 20230627

Claims (7)

1. The inverter welding power supply is characterized by comprising a mode and parameter setting module and a control module, wherein the mode and parameter setting module is used for selecting a resistance welding mode, a workpiece is connected with the output end of the inverter welding power supply, the control module is used for controlling the output current of the inverter welding power supply according to the resistance welding mode, the states of a resistance welding electrode and the workpiece, and the workpiece is welded by applying pressure to the workpiece through the output current; The inverter welding power supply further comprises a signal acquisition module, wherein the input end of the signal acquisition module is connected with the output end of the inverter welding power supply, the output end of the signal acquisition module is connected with the control module, the output signal of the inverter welding power supply is acquired through the signal acquisition module, the control module judges the states of the resistance welding electrode and the workpiece according to the output signal, and controls the output current of the inverter welding power supply according to the resistance welding mode and the states of the resistance welding electrode and the workpiece, and the workpiece is welded by applying pressure to the workpiece through the output current; The inverter type welding power supply further comprises an output feedback module, wherein the input end of the output feedback module is connected with the output end of the inverter type welding power supply, and the output end of the output feedback module is connected with the input end of the signal acquisition module; The inverter type welding power supply further comprises a rectification filter module, an inversion module and a rectification output module, wherein the input end of the rectification filter module is connected with mains supply, the output end of the rectification filter module is connected with the input end of the inversion module, the input end of the rectification output module is connected with the output end of the inversion module, the input end of the signal acquisition module is connected with the output end of the rectification output module, the output end of the signal acquisition module is connected with the control module, the output end of the control module is connected with the inversion module, and the workpiece is connected with the output end of the rectification output module; The automatic identification resistance welding mode is selected through the mode and parameter setting module, the output signal of the rectification output module is collected through the signal collecting module, the control module judges the states of the resistance welding electrode and the workpiece according to the output signal, and the output current of the rectification output module is controlled according to the resistance welding mode and the states of the resistance welding electrode and the workpiece, and the workpiece is welded by applying pressure to the workpiece through the output current.
2. An electric welding machine comprising the inverter welding power source of claim 1 and a resistance welding electrode, wherein a workpiece to be welded is connected to an output end of the inverter welding power source, pressure is applied to the workpiece through the resistance welding electrode, and the workpiece is welded through an output current of the inverter welding power source and the pressure.
3. A welding method applied to the inverter type welding power source of claim 1, comprising the steps of: Selecting an automatic identification resistance welding mode; setting welding parameters; entering an initialization mode; collecting an output signal of an inverter type welding power supply; and when the short circuit between the resistance welding electrode and the workpiece is judged through the output signal, controlling the output current of the inverter welding power supply.
4. A welding method according to claim 3, wherein the output current passes through the workpieces to weld the workpieces together when the resistance welding electrode applies pressure to the workpieces.
5. A welding method according to claim 3, wherein the output signal of the acquisition inverter type welding power source is returned when it is judged from the output signal that the resistance welding electrode is not shorted with the workpiece.
6. A welding method according to claim 3, wherein the welding is ended when it is determined that the resistance welding electrode is separated from the workpiece by the output signal after the inverter type welding power source output current is controlled.
7. A welding method according to claim 3, wherein after controlling the output current of the inverter type welding power source, when it is judged that the resistance welding electrode is not separated from the workpiece by the output signal, the output signal of the acquisition inverter type welding power source is returned.

Description

Inverter type welding power supply, electric welding machine and welding method Technical Field The invention belongs to the field of electric welding machines, and particularly relates to an inverter type welding power supply, an electric welding machine and a welding method. Background The inverter type arc welder is a new type arc welder, which is generally to input AC network voltage to rectifier and filter to output DC voltage, then to invert the AC voltage to medium frequency by the alternate switch action of high power switch electronic element, to reduce the voltage to the voltage suitable for welding by transformer, to rectify again and output quite stable DC welding current by reactance filtering, to melt the upper filling material and the welded material by the high temperature arc generated between the positive and negative poles, to achieve the aim of combining them. Conventional arc welders are generally referred to as welders having a shielded metal arc welding, an argon arc welding, and a gas metal arc welding. When welding a sheet of 1mm or less, the following problems are involved in arc welding: 1. Welding rod arc welding is difficult to weld materials below 1mm under conventional conditions unless specific gaskets and auxiliary systems are added; 2. The argon arc welding can be used for welding the thin plates, but argon is required to be used as shielding gas, and meanwhile, the requirement on welder operation is high; 3. Conventional consumable electrode gas shielded welding is difficult to weld sheets below 1mm unless pulses and gaskets are added to assist in support. Therefore, in the conventional arc welder, when welding thin plates, auxiliary functions are required to be added, high requirements are required for operation, and the use is inconvenient, so that a welding power source, an electric welder and a welding method which can be used for the thin plates and are convenient to use are needed. Disclosure of Invention In order to overcome the defects in the prior art, an object of the present invention is to provide an inverter type welding power source, another object of the present invention is to provide an electric welding machine, and yet another object of the present invention is to provide a welding method. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: one aspect of the invention provides an inverter welding power supply, which comprises a mode and parameter setting module and a control module, wherein a resistance welding mode is selected by the mode and parameter setting module, a workpiece is connected with the output end of the inverter welding power supply, the control module controls the output current of the inverter welding power supply according to the resistance welding mode, the states of a resistance welding electrode and the workpiece, and the workpiece is welded by applying pressure to the output current. Preferably, the inverter welding power supply further comprises a signal acquisition module, the input end of the signal acquisition module is connected with the output end of the inverter welding power supply, the output end of the signal acquisition module is connected with the control module, the output signal of the inverter welding power supply is acquired through the signal acquisition module, the control module judges the states of the resistance welding electrode and the workpiece according to the output signal, and controls the output current of the inverter welding power supply according to the resistance welding mode and the states of the resistance welding electrode and the workpiece, and the workpiece is welded by applying pressure to the workpiece through the output current. Preferably, the inverter welding power supply further comprises an output feedback module, wherein the input end of the output feedback module is connected with the output end of the inverter welding power supply, and the output end of the output feedback module is connected with the input end of the signal acquisition module. Preferably, the inverter welding power supply further comprises a rectification filter module, an inversion module and a rectification output module, wherein the input end of the rectification filter module is connected with a mains supply, the output end of the rectification filter module is connected with the input end of the inversion module, the input end of the rectification output module is connected with the output end of the inversion module, the input end of the signal acquisition module is connected with the output end of the rectification output module, the output end of the control module is connected with the inversion module, the workpiece is connected with the output end of the rectification output module, an automatic identification resistance welding mode is selected through the mode and parameter setting module, the output signal of the rectification output module is acquired thro