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日立工具公司开发出一种新型立铣刀,具有优异的切削性能。刀具材料为该公司新开发的TiC—TiN—Nbc系金属陶瓷,特点是韧性得到大幅度提高,抗弯强度优于TiN系金属陶瓷,已接近硬质合金;断裂韧性优于K10,热传导率很低,具有广泛的切削适应性。该立铣刀的螺旋角为45°,柄部直径大于切削齿直径。经过多次切削试验表明:(1)新型立铣刀切削刃刚性得到明显改善,无论顺铣、逆铣加工,使用寿命均较长,与硬质合金立铣刀相比,工具寿命提高1倍以上。(2)切削过程中,加工表面无进刀痕迹,加工表面粗糙度R_(max)约为1μm,已达
Hitachi Tools has developed a new type of end mill with excellent cutting performance. Tool material for the company’s newly developed TiC-TiN-Nbc series of cermets, characterized by a substantial increase in toughness, bending strength is better than TiN cermet, close to the cemented carbide; fracture toughness better than the K10, thermal conductivity is very Low, with a wide range of cutting adaptability. The helix angle of the end mill is 45 ° and the diameter of the shank is larger than the diameter of the cutting teeth. After several cutting tests show that: (1) The new type of end milling cutter edge rigidity has been significantly improved, regardless of down milling, down milling, the service life is longer, compared with the carbide end mill, tool life increased by 1 times the above. (2) During the cutting process, there is no cutting marks on the machined surface. The machined surface roughness R max is about 1 μm and reached