The new connection assembly program contains four cone-shapes of fixed welders and four bolts.It is used for connecting ......

根据机油标尺座锥形、带凸缘、底部通孔的旋转体特点，进行了不同加工方法的工艺分析。对该零件在一副模具上实现落料、拉伸、冲孔、......