针对分层渐进成形中金属板材易破裂的问题,在两点对称式渐进成形工艺的基础上,建立了有限元模型,确定了工具头的加工轨迹,选定合理的工艺参数。采用分层渐进成形和螺旋渐进成形的方式,利用MSC.MARC软件对圆锥台制件的渐进成形过程进行了数值模拟,对比分析了两种成形方式下目标制件的壁厚均匀性、等效塑性应变和应力状态。结果表明:与分层渐进成形相比,螺旋渐进成形使目标制件成形区域的壁厚均匀性提高了2.3%;在螺旋渐进成形方式下,等效塑性应变的变化量更小,变形更加均匀,应力三轴度较小,成形质量更高。 Aiming at the problem of the sheet metal being easily ruptured in the layered progressive forming process, a finite element model was established based on the two-point symmetrical incremental forming process. The machining path of the tool head was determined and the reasonable process parameters were selected. The progressive forming process of truncated cone was numerically simulated by using MSC.MARC software by means of layered progressive forming and spiral progressive forming. The wall thickness uniformity of the target workpiece under the two forming methods was compared and analyzed. Plastic strain and stress state. The results show that compared with the hierarchical progressive forming, the spiral progressive forming increases the wall thickness uniformity of the target part by 2.3%. In the spiral progressive forming method, the change of the equivalent plastic strain is smaller and the deformation is more uniform , Smaller stress triaxiality and higher forming quality.