前言 GL—138注塑机是桂北磨床厂的新产品,该产品的关键零件之一是长897mm,具有内通孔φ36~(+0.05)料筒。内孔表面光洁度要求为▽7,孔的长经比为25,属于深孔范畴。在现行工艺中,钴孔是在普通车床上用加长麻花钻钻孔,没有冷却润滑设备,排屑困难,因而只能采用手动分级进给,并且分两头钻通,钴头损耗大,加工光洁度,精度差,轴线错位达1.55mm。 Preface GL-138 injection molding machine is a new product of the grinder factory in Guibei. One of the key components of this product is 897mm in length with a barrel of φ36 ~ (+0.05) through hole. Hole surface finish requirements ▽ 7, long hole ratio of 25, belonging to the deep hole category. In the current technology, the cobalt hole is drilled in an ordinary lathe with an extended twist drill. Since there is no cooling lubricating equipment and chips are difficult to discharge, the cobalt hole can only be manually graded, and the drill hole passes through two ends. The cobalt head has large loss and the machining finish , Poor accuracy, misalignment up to 1.55mm.