Electric arc welder

An arc welding machine and circuit technology, applied in arc welding equipment, welding equipment, manufacturing tools, etc., can solve the problems of high material costs and complex structures, and achieve improved workability, improved welding quality, and good arc disconnection Effect

Inactive Publication Date: 2010-12-22
DAIHEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in the prior art, additional taps need to be provided on the secondary side coil of the main transformer INT, and switches or thyristor elements corresponding to large currents for selecting the taps are also required, so the structure becomes complicated and the material costs also become higher

Method used

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  • Electric arc welder
  • Electric arc welder
  • Electric arc welder

Examples

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Embodiment Construction

[0032] figure 1 It is an electric connection diagram of the arc welder of Embodiment 1. exist figure 1 in, with Figure 8 In the electrical connection diagram of the conventional arc welding machine shown, components with the same symbols operate in the same manner, so descriptions are omitted, and only components with different symbols will be described.

[0033] figure 1 The selection circuit WD shown selects either the spot welding mode or the no spot welding mode. The output current setting circuit IR sets a predetermined output current setting signal Ir.

[0034] When the spot welding mode is selected by the selection circuit WD, the main control circuit SC outputs the spot welding mode signal Wc, and performs a comparison operation on the value of the output current setting signal Ir and the value of the output current detection signal Id to output a comparison operation signal Sc .

[0035] figure 1 The shown pulse width modulation circuit PWM performs PWM con...

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PUM

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Abstract

When welding rods are electrical arc welded, the current values with a maximum load voltage contains a maximum load voltage, which makes electric arc unlikely to be extinguished when point welding is in the process. For these factors, the invention provides an electric arc welder comprising a direct-current power circuit rectified and smoothed from a commercially used alternating current power source to output direct voltages; the direct voltages undergo a voltage changing process into an invert circuit with high frequency alternating voltages, which also undergo a voltage changing process into a main voltage transformer providing alternating current voltages applicable to welding; the voltages outputted from the main transformer is rectified as a secondary rectifying circuit; a detection circuit detecting the outputted current after the rectification and a main control circuit controlling the invert circuit based on the detection of the outputted current are also provided hereby in the invention. With the introduction of a point welding mould to decide a circuit, the main control circuit functions to reduce the maximum load of various outputted current so that the external performances of the electric characteristics can be controlled.

Description

technical field [0001] The present invention relates to a technique for switching the maximum load voltage characteristics of an arc welder according to a welding mode. Background technique [0002] When an arc welder is used for electrode arc welding, if the two characteristics of the first maximum load voltage characteristic of the non-spot welding (tackwelding) mode and the second maximum load voltage characteristic of the tack welding mode are not available, repeated arc welding and welding In arc extinguishing spot welding, the arc cannot be easily extinguished due to the high maximum load voltage. [0003] Figure 8 It is an electrical connection diagram of an arc welding machine in the prior art. exist Figure 8 Among them, the DC power supply circuit is formed by the primary rectification circuit DR1 and the smoothing capacitor C1, the primary rectification circuit DR1 rectifies the AC power supply AC to generate a rectified voltage, and the smoothing capacitor C1 s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/10
Inventor 服部靖吕荣庆范承士宋维江李少南杨熙
Owner DAIHEN CORP
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