铣削平面时,铣刀空行程,若无让刀机构,铣刀就会划伤表面。目前在组合机床设计中,铣削让刀机构设计在铣头主轴上,有气动、机械、液压三种形式。为了简化铣头结构,可利用刀体转位和弹簧复位的原理,设计自动让刀端铣刀,如图所示。自动让刀端铣刀由刀盘、盖板、可调刀组和让刀刀组等组成。可调刀组由调整螺钉1、刀垫3、刀片4、楔块6、15和双头螺栓5组成。调整螺钉1可使可调刀组作径向、轴向移动,形成阶梯铣刀。让刀刀组由刀体10、带孔刀片8、固定螺钉9、弹簧16、精削量调整螺钉17、销轴11、紧固螺钉12组成。让刀刀组吃刀时压缩弹簧;不吃刀时,弹簧复位,刀 Milling the plane, milling cutter empty trip, if there is no let the knife body, the cutter will scratch the surface. Currently in the combination of machine tool design, milling cutter body design in the milling head spindle, a pneumatic, mechanical, hydraulic three forms. In order to simplify the milling head structure, you can use the principle of cutter body and spring return, the design automatically let the cutter end cutter, as shown in the figure. Automatic cutter end cutter from the cutter, cover, adjustable knife group and let knife group. Adjustable knife set by the adjustment screw 1, the pad 3, the blade 4, wedge 6,15 and studs 5 components. Adjusting the screw 1 allows the adjustable knife set to move radially and axially to form a stepped milling cutter. The knife set is composed of a cutter body 10, a perforated blade 8, a fixing screw 9, a spring 16, a fine adjustment screw 17, a pin 11, and a fastening screw 12. Let the knife group to eat the knife when the compression spring; do not eat the knife, the spring reset, knife