NEGATIVE TYPE CUTTING INSERT BLADE INTERCHANGEABLE ROTARY CUTTING TOOL USING SAME CUTTING INSERT BLADE INTERCHANGEABLE ROTARY CUTTING TOOL SYSTEM AND CUTTING METHOD

摘要

Provided is a negative type cutting insert with a cutting edge including four coarse processing long side cutting edge portions and four fine processing short side cutting edge portions alternately linked together. The cutting insert can be used for coarse processing when attached to a coarse processing tool body or for fine processing when attached to a fine processing tool body. The cutting insert may be re attached to the fine processing tool body or the coarse processing tool body after coarse processing or fine processing and then used for fine processing or coarse processing. Thus the entire periphery of the cutting edge can be fully utilized.