Electric arc wire filling and rolling combined material additive manufacturing method and device

Abstract

The invention relates to a material additive manufacturing method and device, in particular to an electric arc wire filling and rolling combined material additive manufacturing method and device. During operation of the device, a substrate is fixed to a welding platform; a welding gun is controlled to move in cooperation with a wire feeding mechanism to conduct electric arc wire filling to form aweld layer; meanwhile, the temperature of the weld layer is collected through a temperature sensor; collected data are transmitted to a controller; the controller controls a rolling wheel to conduct synchronous rolling strengthening on the surface of the weld layer. In the workpiece manufacturing process, metal grains are refined. A residual compressive stress layer is introduced to reduce the surface roughness. The wear resistance, corrosion resistance and compatibility of the surface of a workpiece are improved. The internal defects such as pores, non-fusion and shrinkage porosity possibly occurring to metal parts manufactured through a common electric arc material additive manufacturing method are avoided. Meanwhile, the comprehensive mechanical properties of metal workpieces are improved.

Description

technical field [0001] The invention relates to an additive manufacturing method and device, in particular to an arc filling and rolling composite additive manufacturing method and device. Background technique [0002] Additive Manufacturing (AM) technology is a technology that uses the method of gradually accumulating materials to manufacture solid parts. Compared with traditional material removal and cutting technology, it is a "bottom-up" manufacturing method. This technology does not require traditional tools, fixtures and multiple processing procedures, and can quickly and precisely manufacture parts of any complex shape on one piece of equipment, thereby realizing "free manufacturing" and solving many complex structural parts that were difficult to manufacture in the past Forming, and greatly reduce the processing steps, shorten the processing cycle. Therefore, it has broad application prospects in high-end manufacturing fields such as aerospace, automobiles, molds, a...

AI Technical Summary

Problems solved by technology

Especially when the edge of the part is piled up, due to the existence of the liquid molten pool, it becomes more difficult to control the edge shape and forming size of the part

These problems directly affect the metallurgical bonding strength, accumulation dimensional accuracy and surface quality of the parts, resulting in serious warping deformation and cracking of the parts

In addition, changes in process parameters, external environment and molten pool state may cause various special metallurgical defects in local parts inside the part, such as pores, lack of fusion, cracks and shrinkage porosity, etc.

These internal defects are fatal fatigue initiation sources of load-bearing structures, which affect the internal quality, mechanical properties and service safety of the final formed parts

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