重型机械制造业中,大型轴类零件双键槽的加工,一般是在龙门铣床上进行。通常的工艺方法是将工件借助于两个等高“V”形垫铁装夹、找正、压紧在铣床工作台上,利用立铣刀先进行第一键槽的加工。键槽对工件轴心线的对称性误差,一般是按线或用啃刀花对中的方法来保证。第一个键槽铣好后,工件绕自身轴线转动,利用划针找水平中心线的方法来 Heavy machinery manufacturing industry, large shaft parts double keyway processing, are generally carried out in the gantry milling machine. The usual technique is to clamp the workpieces with two “V” shaped horns to find the right and press them on the working table of the milling machine, and to process the first key groove first with the end mill. The symmetry of the keyway on the axis of the workpiece error, usually by line or with a knife eating flowers to ensure that the method. After milling the first keyway, the workpiece rotates about its own axis, using the centerline of the stylus to find the horizontal centerline