浅析机床夹具设计中的虚设过定位

Analysis on Fake Interim Positioning in Machine Tool Fixture Design

传统意义上认为工件某个自由度由多个定位元件重复限制称为过定位,在实际应用中,一般工艺要求不允许出现过定位,然而在大型零件加工过程中仍然需要过定位来增加定位装夹刚度,防止工件变形,因此正确区分过定位与虚设过定位成为夹具设计的关键。

In traditional,if the freedom degree of workpiece is repeated and limited by multiple positioning component,it is considered as the interim positioning.In practice,the general technical requirements do not allow interim positioning,but in the machining process of large part,it still needs increasing the positioning clamping rigidity through interim positioning to prevent workpiece deformation.Therefore it is key to distinguish interim positioning and fake interim positioning in locating fixture design.