Why reaming with reamer is the workpiece of ductile iron 500, the aperture will be smaller, and the aperture requirement is 9. After reaming, the reamer will not enter the hole. What is the reason why the hole is too small for the reamer to go in?
You first look at the surface of the processing hole is black and shiny, and if so, the following three cases are more likely:1. the reamer is blunt, or the reamer is too wide.2. reaming allowance is too large.3. reaming too fast.
Possible causes1., cold shrinkage 2. plastic deformation of material, 3. tool edge wear, processing surface roughness is too bad
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