在車床上加工零件时常常要在一个零件上钻几个大小不同的孔,为此需要調換钻头和钻套,增加了很多輔助时。为解决这一問題,我們采用了如图1的旋轉钻套,可以同时装上三个不同規格的钻头,更換时只要旋轉120°便可,从而减少了輔助时間,提高了工作效率。旋轉头1装在与錐柄6焊接成45°的法兰盘9上,三个配钻套錐孔是以带30°錐度(1:16)的定位銷3定 When machining parts on a lathe, you often have to drill several holes of different sizes on one part. To do this, you need to change bits and drill sleeves and add a lot of support. To solve this problem, we use the rotary drill sleeve as shown in Fig. 1, which can load three drill bits of different specifications at the same time. As long as the rotary drill is rotated by 120 °, the auxiliary time is reduced and the work efficiency is improved. The rotary head 1 is mounted on a flange 9 welded to the taper shank 6 at a 45 ° angle. The three conical drill holes are drilled with dowels 3 with a 30 ° taper (1:16)