Special three-jaw chuck for turning

The invention discloses a special three-jaw chuck for turning, characterized by comprising a base plate and clamping jaws. The base plate is a round lathe base plate; each clamping jaw comprises a connecting block and an angle clamping jaw; each angle clamping jaw is in an obtuse angle shape; each clamping jaw is arranged above the base plate in the radial direction; and the connecting blocks are fixed to the base plate through bolts. According to the main purposes, the triangular stabilization principle is utilized, three clamping jaws can stably clamp a workpiece during machining, meanwhile, the angular clamping jaws are arranged at the front ends of the clamping jaws so that a hexagonal part can be better stabilized, and burrs on the hexagonal part can be prevented from influencing the eccentric condition of the workpiece during machining through the arc-shaped guide grooves at the inner corners of the angular clamping jaws. 本发明公开了一种用于车加工的专用三爪卡盘，其特征在于，包括底盘和卡爪，所述的底盘为圆形的车床底盘，所述的卡爪包括连接块和角卡爪，所述的角卡爪为钝角型，所述的卡爪设在