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Dimensions of Locating pins

In fixture design, the selection and calculation of locating pin size is an important problem. One, the selection of cylindrical pin size See figure 1,d_1 for the diameter of the cylindrical pins, d_1 for the cylindrical pin matching the diameter of the hole. In order to fit the workpiece conveniently, hole pins should be left with the appropriate minimum clearance _ (2min), so the diameter of the cylinder pin: D_ (1max) =d_ (1min)-_ (1min) Positioning accuracy requirements can be made _ (1min) = 0, positioning accuracy requirements can be used for promotional activities, Can be expandedcylindrical pins or liquid plastic cylindrical pins to remove the effect of the workpiece hole tolerance zone.