我厂试制并小批量生产新型结构的柴油机连杆。其连杆体、盖的装配定位是依靠定位键与定位槽来保证的,见图1。连杆先在X62铣床上粗铣,留精磨余量。粗铣时,连杆体、盖采用同一组合铣刀加工。在夹具上的定位情况见图2。对连杆定位键与槽的精磨也在X62铣床上进行,其工艺方法如下: 如图2所示,连杆体用小头工艺孔、大头定位台和大头端面定位,连杆盖用螺栓平台、一个侧面和大头端面定位。总之,精磨与粗铣的定位、夹紧方法相同,并且使用同一套夹具。磨削分两道工序进行,先磨结合面及定位键侧面, I plant trial and small batch production of new structure of the diesel engine connecting rod. The connecting rod, cover the assembly positioning is to rely on positioning keys and positioning slots to ensure, see Figure 1. Connecting rod first rough milling on the X62 milling machine, leaving fine grinding margin. Rough milling, the link body, cover the same set of cutter processing. Fixture in the positioning of the situation shown in Figure 2. As shown in Fig. 2, the connecting rod body is positioned with a small head process hole, a large positioning table and a large end face, and the connecting rod cover is bolted Platform, one side and bulk end face positioning. In short, the grinding and roughing positioning, clamping the same way, and use the same set of fixtures. Grinding divided into two processes, the first grinding surface and the positioning key side,