法兰盘钻孔,一般都是先划线、分孔、打冲印,然后再钻孔。每钻一片,有几个孔得松几次,紧几次,每次松开、放正、固定耽误1分钟,每片就得耽误几分钟,效率比较低。现在介绍一种钻孔胎具。使用这种胎具不再用划线、打冲印,每次变 Flanges are usually drilled, holed, punched, and then drilled. For each piece drilled, several holes are loosened several times. Tightly several times, every time you release, place, and fix it for 1 minute, each piece will be delayed for several minutes, and the efficiency is low. A drilling tool is now introduced. The use of such a piece of equipment is no longer used for marking, printing, each change