“速度”这个概念,犬家是很熟悉的。它是衡量物体运动快慢的一个尺度。在金属切削加工中,刀具与工件之间相对运动的快慢用“速度”来表示,人们把它叫做切削速度。切削速度用每分钟多少米来表示,即是米/分。切削速度的高低,除了和机床主轴转动快慢有关外,还和刀具或工件的直径尺寸有关。如在车床上加工两个工件的外圆时,虽然主轴转速同样是12CO 转/分,但两个工件直径不一样,直径大的切削速度高,直径小的切削速度低。人们经常可以看到大的外圆磨床转速很低,而磨小孔的内圆磨床转速却很高,也正是出于想维持一 The concept of “speed”, dog home is very familiar. It is a measure of how fast the object is moving. In metal cutting, the relative speed of the tool and the workpiece is expressed in terms of “speed”, which is called the cutting speed. Cutting speed with how many meters per minute, that is, m / min. The level of cutting speed, in addition to the speed of rotation of the machine tool spindle, but also with the diameter of the tool or workpiece size. Such as lathe machining two cylindrical workpiece, although the spindle speed is the same 12CO rpm, but the two workpieces of different diameters, high diameter, high cutting speed, low diameter, low cutting speed. People can often see a large cylindrical grinder speed is very low, while grinding the hole grinder internal speed is very high, it is also out of want to maintain a