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Height calculation of locating pin in one-hole positioning
In the mass production, when processing parts such as a box body and a cover plate, a combination of one plane and two positioning holes is often used as a positioning reference, which is referred to as a two-hole positioning. The positioning is mainly to unify the positioning reference of the workpiece in each process, and reduce the positioning error caused by the multiple transformation of the positioning reference, thereby ensuring the machining accuracy of the workpiece. The commonly used positioning elements for positioning on one side of the hole are a positioning support plate and a cylindrical short pin and a chamfered positioning short pin.