斗轮挖掘机铲斗切削刃和斗齿是经常需要更换的易损件。为提高生产能力,延长使用寿命,除应合理选材、正确设计形状和尺寸外,还应注意铲斗切削刃和斗齿在工作时形成的各种角度。否则,同样会引起斗轮驱动功率的不必要消耗和斗齿过快磨损。一、铲斗切削刃及斗齿各名义角度铲斗切削刃和斗齿各名义角度如图1所示。γ为切屑角,系切点法线(此处为斗轮切削圆半径)和切削刃的内纤维所成角度;β为楔 Bucket Wheel Excavator Buckets Cutting edges and bucket teeth are consumables that often need to be replaced. In order to increase production capacity and prolong service life, in addition to reasonable material selection, correct design of shape and size, attention should also be paid to various angles formed by the bucket cutting edge and bucket teeth during work. Otherwise, it will also cause unnecessary consumption of bucket wheel drive power and excessive wear of bucket teeth. A. Bucket cutting edge and bucket teeth The nominal angles of bucket cutting edge and bucket tooth are shown in Fig.1. γ is the chip angle, the angle between the tangent normal (here the radius of the bucket cutting circle) and the inner fiber of the cutting edge; β is the wedge