在农机制造中,常常需要在钢管上加工许多孔,以前是用钻床钻孔,工作量很大。如果用一般平冲头作无凹模冲孔,又会导致管壁变形。苏戈麦尔工学院设计了一种无凹模冲孔用的特殊冲头(见图),其工作部分加工成斜突和斜坡两部分,它们折转成一定的角度,该角度保证了冲头逐渐切入管坯,从而降低了冲 In the agricultural machinery manufacturing, often need to process a lot of holes in the steel pipe, previously drilled with a drilling machine, heavy workload. If the general flat punch for die-free punching, will lead to tube wall deformation. Sogol Miel Engineering School designed a special die without die punch (see photo), the working part of the processing into a ramp and ramp two parts, they turn into a certain angle, the angle to ensure that the red Head gradually cut into the tube, thereby reducing the red