Double-sided electric arc additive manufacturing device and method based on numerical simulation and stress monitoring

Abstract

The invention belongs to the field of additive manufacturing, and particularly relates to a double-sided electric arc additive manufacturing device and method based on numerical simulation and stress monitoring. The double-sided electric arc additive manufacturing device based on numerical simulation and stress monitoring comprises a welding gun, a base plate, a rotary positioner used for rotating the base plate, a real-time stress monitoring mechanism used for monitoring the stress of a component in real time and a control system; a numerical simulation subsystem is arranged in the control system; the control system is connected with the welding gun, the rotary positioner and the real-time stress monitoring mechanism; and the control system performs numerical simulation according to the stress value monitored by the real-time stress monitoring mechanism, optimizes the process and controls rotation of the base plate. According to the invention, electric arc material adding is alternately carried out on the upper surface and the lower surface of the base plate connected with the rotary positioner, so that stress generated on the two components interacts, and the purposes of reducing residual stress and controlling stress deformation are achieved; and the stress in the component in the additive manufacturing process is monitored in real time, the additive manufacturing process is simulated and optimized through a finite element analysis method, and the stress deformation control effect is improved.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to a double-sided arc additive manufacturing device and method based on numerical simulation and stress monitoring. Background technique [0002] Arc additive manufacturing technology is a kind of metal additive manufacturing technology. It uses arc as energy-carrying beam to manufacture metal solid components by layer-by-layer surfacing welding. The process uses arc as energy-carrying beam to melt the welding wire, and then traditionally The machine tool or mechanical arm is used as the moving carrier to accumulate the high-temperature liquid metal droplets layer by layer according to the set path. Arc additive manufacturing technology has the characteristics of simple equipment, high deposition rate, short production cycle, and low production cost. It is a low-cost, high-efficiency new forming process and method. [0003] However, due to the uneven heat input dur...

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Problems solved by technology

[0003] However, due to the uneven heat input during the arc additive process, the uneven expansion and contraction of the material in space and time will result in a large residual tensile stress inside the final formed part, and even defects such as microcracks and deformation. Forming quality is difficult to control

Such defects also limit the application and promotion of arc additive materials.

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