一、行星轮进刀的缺点我厂新制镗床的进刀机构,原设计为行星轮进刀(如图1),即装在镗杆3杆上的丝杠1与装在刀盘2上的螺母啮合;丝杠1一端装有行星轮4。镗杆旋转一周,挡销5拨动行星轮上的一个齿,使丝杠1跟着转动,拖动刀盘前进一段距离。行星轮进刀装置有如下缺点:1)集中进刀,刀具易干损坏。2)负荷集中,各机件需有足够的强度,否则容易损坏丝杆、挡销等机件。3)加工曲面的进刀处呈现出一条极 First, the shortcomings of the planet wheel feed I plant new boring machine feed institutions, the original design for the planetary wheel feed (Figure 1), that is mounted on the boring bar 3 screw rod 1 and mounted on the cutter 2 Nut meshing; one end of the screw 1 is equipped with a planetary gear 4. Boring bar rotation a week, stop pin 5 toggle a tooth on the planet wheel, so that the screw 1 followed rotation, drag the cutter forward a distance. Planetary wheel feed device has the following disadvantages: 1) focus on the knife, the tool easy to dry damage. 2) load concentration, all parts need to have sufficient strength, otherwise easily damaged screw, stop pin and other parts. 3) Machining surface of the feed showing a pole