Rotating cutting tool and reversible cutting insert with variable width secondary flank for rotating cutting tool

摘要

In the rotary cutting tool (52) used in milling, the reversible cutting insert (20) is detachably fixed to the cutting body (54). The cutting insert (20) has two opposite end faces (22) interconnected by a continuous peripheral face (24), the peripheral face (24) alternating with three corner faces (28). Includes three existing sides (26). The side surface (26) and the corner surface (28) intersect with both end surfaces (22) at the side edge (32) and the corner edge (34), respectively, and each side edge (32) has a main cutting edge (36). Each corner edge (34) has a corner cutting edge (38) and a minor cutting edge (40). Each minor cutting edge (40) has a projected minor cutting length (LM) at the end face, and each associated minor flank (48) has two lateral boundary points included in the horizontal plane (PH). Between the horizontal plane (PH) and the median plane (M), the secondary clearance width (W) varies with the offset distance (DO) between the horizontal plane (PH) and the median plane (M). Each projected secondary cut length (LM) is greater than the maximum secondary relief width (WMAX) of its associated secondary relief surface (48). [Selection] Figure 1