Pulsed tungsten argon arc welding method

A welding method and argon arc welding technology, applied in welding medium, welding equipment, welding equipment, etc., can solve the problems of welding metal impact energy and fusion zone performance that are not easy to control, and achieve the effect of improving performance

Inactive Publication Date: 2014-07-02
SUZHOU JIEDERUI PRECISION MACHINERY
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Problems solved by technology

However, because the impact energy of the weld metal and the performance of the fusion zone are not easy to control, it has not been widely used.

Method used

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Experimental program
Comparison scheme
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Embodiment Construction

[0024] Below in conjunction with specific embodiment the technical scheme is further described as follows:

[0025] Pulse argon arc welding has a base value current I b , pulse current I p , average current I a , base value time T b , pulse time T p , pulse frequency f , Pulse waveform duty cycle K p , the main pulse parameters such as the current transition from the base value stage to the peak value stage and the speed from the peak value stage to the base value stage. Selecting appropriate parameters and combining these parameters can well control the droplet transfer state of pulsed argon arc welding.

[0026] When the droplet transitions from pulse to drop, the current changes in pulses, which only changes the macroscopic welding energy, and has little influence on the energy in each transition cycle, which makes the droplet size uniform, the transition is regular, the direction is strong, and the spatter Less, good stability. Therefore, one pulse and one dr...

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Abstract

A pulsed tungsten argon arc welding method comprises the following steps that (1) gas proportion of protective gas is determined; (2) composition of parent material is determined; (3) composition and diameter of a soldering wire is determined; (4) the welding is conducted according to the welding process specification. The welding process of the step (4) is characterized in that the requirements of the welding process comprise the steps that (a) the protective gas is the mixed gas of argon and oxygen, wherein at room temperature, the argon is 98% in volume, and the O2, namely the oxygen is 2% in volume; (b) it is guaranteed that the droplet transition is the one-pulse-one-droplet pulse jet flow transition in the welding process. According to the technical scheme, the pulsed tungsten argon arc welding method has the advantages that the welding spatter is small, bond area performance is improved, appearance of weld forms well, all position welding are applicable, and current range is wide.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a mixed gas shielded welding welding method. Background technique [0002] Welding is a very important link in the manufacturing industry. Welding technology directly affects the quality, life and production cost of products. Compared with traditional manual arc welding, mixed gas shielded welding has great advantages in work efficiency and economic benefits, and was popularized and applied in China in the 1980s. However, because the impact energy of the weld metal and the performance of the fusion zone are not easy to control, it has not been widely used. [0003] Pulse argon arc welding has been popularized because of its advantages such as small spatter, beautiful weld shape, good arc axiality, suitable for all-position welding, and wide current range. At present, pulsed argon arc welding is widely used in industries such as vehicles, aerospace, and construction, which will...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K35/38
CPCB23K9/173B23K9/09B23K35/383B23K2103/04
Inventor 姚振红
Owner SUZHOU JIEDERUI PRECISION MACHINERY
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