球阀阀体(图1)阀座孔开裆精度决定着球阀启闭力矩的大小,而阀体阀杆孔端面的加工既关系到阀门的启闭力矩,又关系到阀杆的密封。为了控制阀杆孔端面的尺寸误差,经过对制造工艺的不断改进,阀体采用组合机床加工,并设计制作了阀杆孔端面尺寸专用量具(图2)。图1　阀体量具的定位采 Ball valve body (Figure 1) Seat hole opening and closing crotch accuracy determines the size of the ball valve opening and closing torque, while the valve stem bore end face of both the valve opening and closing torque, but also relates to the valve stem seal. In order to control the size of the stem hole end surface error, through continuous improvement of the manufacturing process, the valve body using a combination of machine tools, and designed the valve stem bore end size special measuring tools (Figure 2). Figure 1 Valve body positioning measuring mining