Study on Offsetting Path Planning for Electromagnetic-compressed Plasma Deposition Manufacturing in Rapid Metal Tooling

摘要

Direct metal shaping has been received more and more eyes in rapid manufacturing and Plasma Deposition Manufacturing has provided an effective way in fabricating metal parts directly from their digital models. In this paper, the electromagnetic-compressed plasma deposition manufacturing is presented which employs the electromagnetic-compressed plasma arc as the thermal source which is provided with the characteristics of low-cost and high efficiency. The influence of torch path to the performance of metal parts is researched and the algorithms of offsetting path planning are studied including the self-intersection algorithm and across-intersection algorithm between complicated two dimension rings. According to the algorithm, the valid rings are extracted and the redundant ring is eliminated successfully and efficiently in the torch path. The algorithm is verified on path planning of sheet metal stamping mould of wheel fender. The result shows that the crystal grain was greatly refined with the help of electromagnetic and the complicated contour of sheet stamping mould can be fully filled with the help of developed algorithms which suggest an efficient way for virtual manufacturing of rapid metal tooling.