在龙门刨床或镗床上加工各种工件时,必须把工件压紧在工作台上才能加工。在一般情况下,压紧工件的方法是用螺钉、压板及垫铁利用杠杆原理把工件压紧(见图1)。尤其是在大型机床上有的压紧处高达1 米多,高低不定,变 化范围大,以致给操 作者带来很多困难。 如为了选配合适的垫 铁 In the planer or boring machine processing a variety of parts, the workpiece must be pressed on the table in order to processing. Under normal circumstances, the method of compacting the workpiece is the use of screws, platens and horns leverage the workpiece compression (see Figure 1). Especially in some large-scale machine tools, there are some of the pressing place up to more than 1 meter in height and in varying range, which brings many difficulties to operators. In order to match the right horn