对于孔径和长孔宽度等于或小于板材厚度两倍的零件冲切,往往由于冲头受力偏扭,冲裁间隙不均匀等引起毛刺粗大,造成零件质量不好,模具寿命短,给模具修理和零件生产带来很大的困难。在实际生产经验中表明,对于具有多个小圆孔和小长孔的板材件采用压料导向冲切,具有一定的技术和经济价值。它是介于普通冲裁和强力压板精冲之间的 For the aperture and long hole width equal to or less than twice the thickness of the sheet metal blanking, often due to the punch bias torsion, blanking gap caused by uneven burrs, resulting in poor quality parts, mold life is short, to the mold repair And parts production has brought great difficulties. In the actual production experience shows that for a small hole with a number of small holes and long plate material using die-oriented punching, with some technical and economic value. It is between ordinary blanking and strong pressure plate fine blanking between