【摘要】 传统超声振动切削加工中刀具后刀面与工件已加工表面的高频摩擦使刀具承受交变拉压应力,导致刀具疲劳崩刃。超声椭圆振动切削技术使刀具以椭圆振动轨迹对工件进行切削,避免了刀具后刀面与已加工表面的摩擦,有效抑制了刀具的崩刃破损;同时,将刀具前刀面与切屑之间有害的摩擦力变为有利的切削力,增加了刀具的剪切角,降低了切削过程中的吃刀抗力,提高了加工精度。更多还原

【Abstract】 The cutting tool is loaded with alternative tension and compression stresses because of high frequency friction between the flank of the cutting tool and the machined surface of the workpiece when traditional ultrasonic vibration cutting, which results in fatigue tipping of the cutting tool. The ultrasonic elliptical vibration cutting can make the tool cut workpiece with elliptical vibration path to prevent from friction between the flank of the cutting tool and the machined surface and to effectively reduce the failure of the tool. Meanwhile, the harmful friction between the front of the cutting tool and the chip is changed into the favourable cutting force, thus the shearing angle of the tool is increased, the resistance to the tool feeding is decreased and the machining quality is improved.更多还原