我厂柴油机上连杆杆身和连杆盖是切开分为两体进行精加工的。在此之前,从锻坯(模锻)一直到半精加工都是一体的。切开后,工艺上要求打印编号(杆身和盖同一编号),成对加工,直至合装。对精铣结合面和精铣螺栓面工序,我们设计了两套铣夹具,使用7～8年,证明质量稳定可靠,操作简单。 1.精铣结合面夹具精铣结合面夹具结构如图1,夹具在卧铣上使用,底座上有四块支承板用以平面定位。对于杆身,其平面定位是由大端的支承板和小端定位销的端面共同形 I plant diesel engine connecting rod shaft and connecting rod cover is cut into two bodies for finishing. Prior to this, from forging (forging) until semi-finishing are one. After cutting, the process requires print number (shaft and cover the same number), paired processing until combined. For the fine milling surface and the fine milling bolt surface process, we designed two sets of milling jigs, using 7 to 8 years, proving that the quality is stable and reliable and the operation is simple. 1. Fine milling combined with the surface of the fixture precision milling fixture surface structure shown in Figure 1, the fixture used in the horizontal milling, the base has four support plates for planar positioning. For the shaft, the plane is positioned by the large end of the support plate and the end of the small end locating pin common