前缸体件的数控加工中心专用夹具设计

Design of Numerical Control Machining Center Special Fixture for Front-cylinder Block Workpiece

针对某石化设备上前缸体件的工序集中加工要求,提出设计一种数控加工中心专用夹具装置.根据加工工序顺序优先原则,分析前缸体件首道加工工序问题,提出以工件外圆柱面为粗基准代替传统镗削为首道工序的平面粗基准,利用六点定位原理的完全定位方案,设计一套专用V形块定位的夹具装置,保证工件能正确装夹在数控加工中心机床上,完成工件平面及其上螺纹孔面的加工.该夹具装置实现了大规模定制生产需求,提高了数控加工能力.

According to the integrated process machining requirement of the front-cylinder block of the petrochemical equipment, a special fixture for NC machining center is proposed. The first machining procedure problem of the front-cylinder block is analyzed based on priority principle of machining processes, the plane rough datum of the first procedure traditional boring is replaced by cylindrical surface rough datum of workpiece, using the complete located scheme of six point position principle, the design of a set of special V shaped block position fixture device is proposed, to ensure the workpiece can be correctly installed on the NC machining center, the plane and its thread hole surface are machined completely. This fixture device can realize mass customization production requirement and improve the ability of NC machining.