Since only a few of the cutting edges are engaged with the workpiece at a time, he*y cuts canbe taken without adversely affecting the tool life. In fact, the permissible cutting speeds andfeeds for milling are three to four times higher than those for turning or drilling.

由于同一时间只有部分切削刃切削工件因此可以在对刀具寿命没有不利影响的情况下承担重型切削。事实上铣削允许的切削速度和进给比车削或钻削高三到四倍。

Moreover, the quality of the surface*achined by milling is generally superior to the qualityof surface*achined by turning, shaping, or drilling.

此外,由铣削加工的表面质量通常优于车削、刨削或钻削加工的表面质量。

A wide variety of milling cutters is *ailable in industry. This, together with the fact that amilling machine is*ery versatile machine tool, makes the milling machine the backbone of amachining workshop.

工业上可采用的铣刀类型众多。连同铣床是****通用机床的事实使得铣床成为机加工车间的支柱。

As far as the direction of cutter rotation and workpiece feed are concerned, milling isperformed by either of the following two methods.

至于涉及到铣刀转动的方向和工件的进给铣削可以通过下列两种方