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

Abstract

The invention belongs to the field of additive manufacturing, and specifically relates to a double-sided arc additive manufacturing device and method based on numerical simulation and stress monitoring. Including welding torch, substrate, rotary positioner for substrate rotation, real-time stress monitoring mechanism for real-time monitoring of component stress, and control system; the control system is equipped with a numerical simulation subsystem, control system, welding torch, and rotary positioner It is connected with 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 the rotation of the substrate. The present invention alternately performs arc material addition on the upper and lower surfaces of the substrate connected to the rotary positioner, so that the stress generated on the two components interacts to achieve the purpose of reducing residual stress and controlling stress deformation. In addition, the stress in the component during the additive manufacturing process is monitored in real time, and the additive manufacturing process is simulated and optimized by the finite element analysis method to improve the effect of controlling stress and deformation.

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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