用数控加工中心加工空类的工件是一种很方便的方式，这种加工孔的方式可以使转孔的位置更准确、精度更高、效率较高的一种加工方式，对于对精度要求不高的孔径可以忽略这个问题，如果加工一些工艺和精度很高出现了刮痕就要从以下几点试着处理。
With CNC machining center empty workpiece is a very convenient way, this way can make the hole to hole the position of a processing method is more accurate, higher precision and higher efficiency, the aperture for less precision can ignore the problem, if some technology and precision there will be high scratch from the following to try to deal with.
1：参数的设置是不是不合理，可不可以改变加工参数。
1: the parameter setting is not reasonable, can change the processing parameters?.
2：看一下工艺的选择是否正确，预防刮痕的方法是使用镗孔不能选择钻孔。
2: look at the choice of the process is correct, the best way to prevent scratches is the use of boring, can not choose drilling.
3：要先看工艺图看看数控加工的工件厚度，厚度厚的话使用铰刀一铰
3: first look at the process chart to see the workpiece thickness CNC machining, thickness, then use a reamer hinge
4：检查主轴冷却液的出水速度和出水量的大小，是否因为这个原因而导致的铁屑排不出去。还需要观察在数控加工中心加工时的转速是否太高。
4: check the spindle cooling water flow rate and the size of the water, whether because of this reason caused by the iron scraps can not row. It is also necessary to observe whether the speed at the NC machining center is too high.
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