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Whole digit time sequence accommodation method of CO#-[2] welding

An adjustment method and adaptable technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., to achieve the effects of convenient adjustment, wide welding current range, and beautiful weld formation

Inactive Publication Date: 2006-12-13
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a CO 2 The all-digital timing adaptive adjustment method of welding makes it well adapted to the changing condition of the dry elongation of the welding wire during the welding process, and when the droplet is large and cannot transition smoothly into the molten pool only by surface tension The electromagnetic force forces it to transition into the molten pool to maintain the stability of the welding process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] (1) Small current stage at the initial stage of short circuit (t 0 -t 1 )

[0033] When the XINT1 pin signal of the DSP control system is low, that is, after a short circuit is detected in the welding process, the short circuit interrupt subroutine of the system responds immediately, and at this time, the DSP system outputs a narrow pulse width according to the control sequence requirements and delays it for a period of time (0.8ms ), limit the growth of the initial short-circuit current, and prevent instantaneous short-circuit splashing.

[0034] (2) High current stage in the mid-short circuit (t 1 -t 2 )

[0035] After the end of the instantaneous short-circuit control phase (that is, after 0.8ms), the DSP system immediately increases the output pulse width of the PWM according to the control sequence requirements, so that the current rises at a relatively high speed to (150A-200A). Confirm), accelerate the formation of necking.

[0036] (3) The droplet metal tr...

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PUM

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Abstract

The invention relates to whole digit time sequence adaptability control method of the CO2 welding. It is used in the welding technique field. The control method in the CO2 welding power system is practiced to realize the full digital time sequence adaptability adjusting control of the dead full short circuit transient process. The control method of the DSP digital control CO2 welding power includes the overall process digitization time sequence adaptability adjusting control for the CO2 short circuit transient welding, practicing adaptability adjusting to unceasing change of the dry extension of electrode in the handwork semi automation welding process to ensure the stability of the welding process, practicing instantaneous short circuit control while entering the high level interrupt program of the DSP, short circuit current di / dt control in the short circuit stage, and full digital time sequence control in the short circuit transient process. The features of the invention are that the splashing is little, and less then three percent; the formation of weld is beautiful; it has good adaptability to the change of the dry extension of electrode and the disturbance of the arc length; and its adjusting is convenient; the range of the applicable welding current is wide; and it can gain good effect in the range from sixty A to two hundred and eighty A.

Description

technical field [0001] The invention relates to a method for adjusting a welding power source in the field of welding technology, in particular to a CO for controlling the dynamic characteristics of an inverter arc welding power source 2 Soldering all-digital timing adaptive adjustment method. Background technique [0002] CO 2 Gas shielded welding has the characteristics of low cost and high efficiency, and has broad application prospects in the occasions of low carbon steel, low alloy, thin plate steel structure and all-position welding. But because of its own characteristics CO 2 There are problems such as large spatter and poor forming in short-circuit transition welding. Among them, it is the most effective method to realize the control of arc and droplet by welding equipment. [0003] After searching the prior art documents, it is found that the Chinese patent application number is 87103550.2, and the name is: method and device for controlling short-circuit welding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/10B23K9/173
Inventor 孙广何建萍张春波华学明吴毅雄
Owner SHANGHAI JIAOTONG UNIV