Wire feeding device for magnesium alloy electric arc additive manufacturing

Abstract

The invention provides a wire feeding device for magnesium alloy electric arc additive manufacturing. All devices are connected from top to bottom, one end of a rotating shaft is fixed to the front wall of a shell, the other end of the rotating shaft is fixed to the rear wall of the shell, a rotating roller is arranged on the rotating shaft, pressure plates are arranged on the two sides of a welding wire, one end of a pressure spring is connected with the pressure plates, the other end of the pressure spring is connected with an electric push rod, and the electric push rod is fixed to the shell of the wire feeding device; rotating brushes are located on the two sides of the welding wire, a liquid inlet is formed below, a liquid outlet is formed above, a drying agent is contained in the inner ring of a drying pipe, and a heating system is arranged on the outer ring of the drying pipe; ultrasonic generators are fixed on the left and right walls in the shell, and spiral coils are symmetrically fixed on the inner sides of the ultrasonic generators; an inner ring of a spiral thread heater is a spiral resistance wire, and an outer ring is made of a heat insulation material and is provided with a temperature controller; and an argon input port is formed in the right side of an argon protection device, a liquid nitrogen input port is formed in the left side of a micro liquid nitrogen cooling device, and output ports of the two devices are annular. The wire feeding device is simple in structure, forming precision and stability are improved, air holes are not generated in parts, forming precision is high, and formed parts are excellent in performance.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a magnesium alloy arc additive wire feeding device. Background technique [0002] Arc additive manufacturing technology is a kind of additive manufacturing technology that has gradually developed in recent years. The arc is used as the heat source, the welding wire is used as the forming material, and the heat generated by the arc is used to melt the welding wire. Under the control of the set program, According to the three-dimensional digital model, metal parts are gradually formed by stacking welding wires layer by layer from line-surface-body; arc additive manufacturing technology has the advantages of simple structure, low equipment cost, high material utilization rate in the additive process and fast forming efficiency, etc. At the same time, arc additive manufacturing technology does not require molds, and the overall manufacturing cycle of parts ...

AI Technical Summary

Problems solved by technology

[0003] Additive manufacturing under the current arc additive technology is very easy to produce pores inside the parts. These pores mainly come from the wire material under high heat input and the hydrogen generated by the decomposition of water in the air, which greatly reduces the molding process. The performance of the parts, and the parts after arc-added materials have problems such as low forming accuracy and poor forming stability.

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