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摘要
Aiming at the problems of uneven metal flow during extrusion forming process of scroll, excessive peak extrusion load and serious mold wear, the back pressure flow control forming process of scroll was studied using DEFORM-3D, and the back pressure forming principle and the deformation and flow of metal were analyzed. The effects of different back pressure loading modes, such as constant back pressure, linear change back pressure and two-stage back pressure, on the filling degree, forming load and forming uniformity during forming process of scroll were compared and studied. The change trend of the pressure value in the later stage under the condition of changing back pressure was determined. The forming results under different loading modes were further compared and analyzed. It is found that the back pressure loading scheme with non-zero initial force increasing linearly is the optimal solution. ? 2021, Editorial Board of Journal of Plasticity Engineering. All right reserved.
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