Arc voltage track pulse submerged-arc welding control method, control circuit and welding machine

Abstract

The invention relates to an arc voltage track pulse submerged-arc welding control method, a control circuit and a welding machine. The arc voltage track pulse submerged-arc welding control method is as follows: a voltage is output by adopting an arc-pressing track mode, and the pulse current is controlled according to the change of the arc voltage. The control circuit comprises a voltage giving unit, a frequency adjusting unit, an arc voltage tracking unit, a peak basic value adjusting unit and an inverter unit, wherein the voltage giving unit and the arc voltage tracking unit are respectively connected with the frequency adjusting unit which is connected with the peak basic value adjusting unit and the inverted unit in sequence. According to the invention, the heat input quantity can be controlled effectively, the common defects of incomplete fusion of the root and the like during the welding of a first welding seam can be effectively, the welding quality and the welding efficiency are improved, furthermore, the control circuit is simple, the implementation cost is low, the manufacturing process is simple, and the performance is stable.

Description

technical field [0001] The invention relates to an arc voltage tracking pulse submerged arc welding, which belongs to the technical field of submerged arc welding equipment. Background technique [0002] With the development of the national economy, submerged arc welding is widely used in industrial processing, shipbuilding, metallurgy and chemical industry, etc., and the welding requirements are getting higher and higher. However, the traditional submerged arc welding power switch has large loss, poor dynamic and static characteristics, is susceptible to electromagnetic interference from the external environment, and has poor stability, which is difficult to meet the needs of the development of the welding industry. Large welding process parameters are often used in submerged arc welding, which increases the welding heat input, resulting in a coarse metallographic structure of the welded joint, and poor impact toughness of the weld metal, resulting in a decrease in the mech...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the installation space is small, the working conditions are harsh, the operation is complicated, it is not easy to control, and the cost is high

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