我局解州电泵厂为生产扬程高、流量大的潜水电泵,需镗削外径200毫米、内径167毫米、长1200毫米的钢管(材料 A3)。过去是在外单位 T 68卧镗上采用长镗杆进行加工,一是跨度大刚性差,造成振动,光洁度达不到要求;二是镗杆直径受主轴孔及支架孔径限制,也使得刚度降低。因此加工时,转速小,效率低,质量差,成本大。为此,我们在现有的 C 620车床上安装了一种大深孔镗胎具,解决了大深孔的加工问题。经生产考核 Our bureau Xiezhou electric pump factory to produce high lift, large flow of submersible pumps, need to boring diameter 200 mm, diameter 167 mm, length 1200 mm of steel (material A3). In the past is the external unit T 68 horizontal boring boring boring machine for processing, one large span of poor rigidity, resulting in vibration, finish less than the requirements; Second, boring bar diameter by the spindle hole and bracket aperture restrictions, but also makes stiffness lower. Therefore, processing, speed, low efficiency, poor quality, high cost. To this end, we have installed a large deep bore boring machine on our existing C 620 lathe to solve the problem of machining large deep holes. After the production test