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The shape and position errors of guide sleeve mainly include:
The verticality error between guide column and bottom surface of lower die, verticality error between guide sleeve and upper die plane, coaxiality error of guide column and guide sleeve, position error between two guide columns and two guide sleeves, etc. Although these errors do not directly affect the blanking clearance, they will cause the up and down die not parallel, and increase the lateral force during blanking.
In addition, the shape and position error of guide column is also limited by the clearance of guide sleeve. If the profile error selection will affect the normal sliding between guide sleeve during blanking, the wear between guide sleeve will be intensified, and the clamping phenomenon will occur in serious cases, which will cause damage to the mold and equipment. If the tolerance of shape and position is too small, it will bring difficulties to the processing and assembly of guide sleeve.
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