在铣床工作台上用常规的压板来夹紧畸形或有铸造表面的工件,有时相当困难。这里介绍一种特殊的球顶夹具,可较易地满足夹紧要求。如图所示,只要在压板的两端各钻一中心孔,然后在凹孔里粘接或焊上轴承滚珠。同时在支承块上 Clamping a deformed or cast workpiece on a milling machine table with a conventional platen can sometimes be quite difficult. Here is a special dome clamp that can easily meet the clamping requirements. As shown, simply drill a center hole in each end of the platen, and then engage or weld the ball bearing in the hole. At the same time in the support block