我公司大量使用北京600型转盘钻机,配用的垫叉常在槽口处胀大,甚至根部胀裂.槽口胀大的垫叉可锻打修复再用,但胀裂的就只好报废了.一台钻机一年至少要报废5～8个垫叉.为此,我队对垫叉进行了小改进.改进后的垫叉(如图)可不变动锁接手卡槽的尺寸,强度提高了,还便于加工,使用效果良好,很受钻工同志们的欢迎. Our company uses a large number of Beijing 600 rotary drilling rigs. The forks that are equipped with them often swell at the notches and even cause the roots to crack. The fork that is expanded in the slots can be repaired by forging, but the cracking will only be scrapped. A rig will scrap at least five to eight forklifts a year. For this reason, our team has made minor improvements to the fork. The improved fork (as shown in the figure) does not change the size of the catcher’s card slot, and the strength is improved. , It is also easy to process, the use of good results, very welcome by the drillers comrades.