How to determine the fit clearance and geometric tolerance of wholesale cylindrical guide bushes
Published:
2022-08-25 16:07
The method for determining the fit clearance and geometric tolerance of wholesale cylindrical guide bushes. In the specific design of wholesale cylindrical guide bushes, the ideas and method steps are as follows:
1. Wholesale cylindrical guide bushes first determine the arrangement of the guide posts according to the shape of the workpiece, the discharge method and the condition of the press;
2. According to the change of blanking gap, the tolerance of each part is allocated. Generally, the manufacturing tolerance of convex and concave molds is one-half to one-third of the change, and the bending deflection of the guide post is one-fourth to one-fifth. The change of the guide post and guide sleeve matching clearance to the blanking clearance is one-half to one-third of the change;
3. Determine the size of the guide column according to the allowable bending deflection of the wholesale Cylindrical guide bush and the lateral force during punching (mainly when punching non-closed parts);
4. Determine the maximum fit clearance of the guide post and guide bush according to the change of the allocated fit clearance to the blanking clearance and the arrangement of the guide post and guide bush;
5. Determine the minimum fit clearance of the guide post and guide bush according to the maximum fit clearance of the wholesale cylindrical guide bush and the machining tolerance of the guide post and guide bush;
6. Determine the shape and position tolerance of the guide post and guide sleeve according to the minimum matching clearance of the wholesale Cylindrical guide bush.
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Shantou Dingxin Metal Products Co., Ltd.
Add：Lai Mei Road Fire Brigade behind Chenghai District Shantou City Guangdong Province China
Tel：+86-0754-85829815 85829816
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