When we process a part, the center hole is A12, the surface roughness is low, and the common center hole boring is used. After drilling, roughing, fine boring, etc., the machine center hole 60° cone is machined. There were scratches, tears, and ribs on the surface, which did not meet the process requirements and affected the processing of subsequent processes. The work was once blocked. After careful observation and analysis, it is believed that the main factor causing the above phenomenon is that the tool front angle is small, the cutting amount is not suitable, and it is easy to form a cutting tumor. Due to restrictions on equipment, parts, etc.
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