拉伸件翻孔模山东省莱阳动力机械总厂（２６５２００）张永军，梁明柱１零件分析图１所示为ＬＤ３７５型呼吸器体上的一个零件，材料为０８Ｆ，厚度为１．２ｍｍ。该零件属于拉伸件上翻孔，因两孔外侧在拉伸件底部分，不符合翻孔件Ｂ≥Ｈ的工艺要求；拉伸件底部圆角部分在... Stretch pieces Turn-hole mold Laiyang Power Machinery Plant, Shandong Province (265200) Zhang Yongjun, Liang Mingzhu Parts Analysis Figure 1 shows a part of LD375 respirator body, the material is 08F, the thickness of 1.2mm. The parts belonging to the stretch on the hole, due to the two holes on the outside of the drawing part of the bottom part, does not meet the requirements of the process turned over B ≥ H;