By analyzing the contact area between the Upper Die and cylindrical solid workpiece during Orbital Forming process, an approximate formula for calculating the contact area rate is proposed.
通过对摆辗加工中摆头与圆柱实心工件接触面积的分析，给出了计算其接触面积率的近似公式。
2
The experiment has proved that mucilage at the extrude die with conicylindricalpassage is better than that with cylindrical passage in extruding condition and production.
由实验证明胶丝挤出口模圆锥形通道比圆柱形通道能改善挤出条件，提高挤出质量。
3
The spring back and secondary yielding of cylindrical billets in elastic tools during upsetting and closed-die upsetting are analyzed.