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焊接式螺纹车刀的缺点是刀片在焊接时会出现裂纹。经过一次或数次补焊后刀杆易损坏.以致消耗更多的金属。装配式螺纹车刀,由开口刀杆4、拉紧螺栓3、斜壁槽2、减震垫板5和刀片1组成,减震垫板用高塑性软金属(如铅)制作,以保证刀片可靠夹紧而无振动。槽的斜壁可防止刀片因受切削力作用而脱出。
The disadvantage of a welded thread turning tool is that the blade will crack when it is welded. After one or several repairs, the shank is easily damaged, consuming more metal. Assembled screwdriver, the opening arbor 4, tighten the bolt 3, oblique wall slot 2, shock pad 5 and a blade composition, shock pad with high plasticity soft metal (such as lead) to ensure that the blade Reliable clamping without vibration. The sloping wall of the groove prevents the blade from being pulled out by the cutting force.