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在铣制和整体磨制钻头时,刃沟和刃背的截形是分别用单独的盘形刀具加工的。这是由于刃沟的截形是随着钻芯直径k的增大而在变化,而刃背的直径q在工作部分的全长上是保持不变的。因此,同时加工钻头四个截形面的铣床要有复杂的运动链,而整体磨制截形就必须用两台机床。用一把成形盘形工具(铣刀或砂轮)组合加工钻头的沟和背(图1),可以避免由于换装钻头、分度机构的动作和单独刀具在机床上对刀而产生的误差,以及能够缩短加工的机动
In the milling and the overall grinding bit, the blade groove and blade back truncated separately with a separate disc tool processing. This is due to the fact that the truncation of the flume varies with increasing core diameter k while the blade back diameter, q, remains constant over the entire working length. As a result, milling machines that process four cross-sections of the drill at the same time must have a complex kinematic chain, while the overall milling truncation requires two machines. Combining the groove and the back of the drill bit with a formed disc tool (milling cutter or grinding wheel) avoids errors due to dressing bit, indexing mechanism movements and tool alignment of the individual tools on the machine tool, And can shorten the machining maneuver