A dual-melting electrode transfer arc compound welding power supply device

Abstract

The invention provides a double-consumable-electrode transfer electric arc hybrid welding power supply device which comprises a constant-voltage inverter circuit, a direct-current constant-voltage output circuit, a constant-voltage inverter circuit driving circuit, a direct-current constant-voltage output circuit driving circuit, a current switching and driving circuit, a core control circuit, an auxiliary electric arc current sampling filter circuit, an auxiliary electric arc voltage sampling filter circuit, a main arc current sampling filter circuit, a main arc voltage sampling filter circuit and a current switching circuit. The core control circuit controls alternate connection of a power switch tube in the current switching circuit to enable an auxiliary electric arc to perform wire welding on a main arc and an auxiliary arc, assists alternate burning between auxiliary welding wires and base metal, and controls power switch elements of the constant-voltage inverter circuit according to feedback current and voltage passing through the auxiliary electric arc so as to enable output voltage of the auxiliary electric arc to arrive at a preset value; and controls power switch elements of the direct-current constant-voltage output circuit according to feedback main arc current signals and main arc voltage signals so as to enable main arc output voltage to arrive at a preset value.

Description

technical field [0001] The invention belongs to the technical field of thermal processing, and in particular relates to an electric arc compound welding equipment. technical background [0002] The twin-wire MIGA welding process is a commonly used high-efficiency welding process. It can increase the welding speed when welding thin plates, and can increase the deposition speed when welding thick plates (compared to single-wire welding). The main way to improve efficiency in thin plate welding is to increase the welding speed, and the distribution of welding heat input in high-speed welding and conventional speed welding is significantly different. Since the heat distribution of the twin-wire welding process is elongated along the welding direction, the heating time for the weld seam per unit length becomes longer, and the result is equivalent to the temperature field distribution during low-speed welding, so it is easy to realize the high-speed welding process. In addition, ...

AI Technical Summary

Problems solved by technology

The conventional twin-wire welding process adopts the double-arc DC reverse connection parallel method, the base material is the cathode, the heat production is large, and the heat input is also large, which is very unfavorable for some high-strength steels that are sensitive to heat input.

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