机械工程专业毕业论文--齿轮油泵机械加工工艺及工艺装备设计与数控仿真.docVIP

摘要 零件的工艺编制是否合理，直接关系到零件的加工能否达到质量要求；合理的工艺编制就能使各工序科学地衔接，实现优质、高产低消耗，使生产均衡、顺利地进行。同时，机床夹具在机械制造中也占有重要的地位，合理的夹具设计能可靠地保证工件的加工质量，提高加工效率，减轻劳动强度，充分发挥和扩大机床的工艺性能。可见这两者在机械制造行业中是至关重要的环节。本次设计的是齿轮油泵上的零件滑油泵体在加工中心机上加工时的专用夹具，因滑油泵体的各个加工面精度要求较高，故夹具要求比较高。在编制加工工艺时，要考虑到各个加工面的各项精度以及形状与位置公差等。 齿轮泵泵体采用灰铸铁HT200，其内腔容易受到磨损，为延长齿轮油泵的使用时间，所以要经常对其内腔进行修复。泵壳内腔磨损后，一般采取内腔镶套法修复，即将内腔搪大后镶配铸铁或钢衬套。镶套后，将内腔搪5、阀座的修理：限压阀有球形阀和柱塞式阀两种。球形阀座磨损后，可将一钢球放在阀座上，然后用金属棒轻轻敲击钢球，直到球阀与阀座密合为止。如阀座磨损严重，可先铰削除去磨痕，再用上法使之密合。 ABSTRACT Parts of the process establishment is reasonable, directly related to the parts of the process can meet the quality requirements; reasonable process planning can make the process scientific convergence, high-quality, high-yield low consumption, the production of a balanced, smooth. Meanwhile, the machine tool fixture occupies an important position in the machinery manufacturing, fixture design can reliably guarantee the quality of the workpiece processing, improve processing efficiency, reduce labor intensity, and give full play to expand the process performance of the machine. Visible both in the machinery manufacturing industry is a vital part. The design of the processing of the oil pump gear pump parts on machining centers, special fixtures are higher, so the fixture requirements are relatively high due to the machined surface accuracy of the oil pump. In the preparation of the process, taking into account the accuracy of the machined surface and the shape and position tolerances.The gear pump body with a gray cast iron HT200, its cavity is susceptible to wear, to extend the use of the gear pump time, so often its cavity repair. Cavity inserts after the wear of the pump housing cavity, in general, repair, upcoming cavity Boring big set with cast iron or steel liner. Casement cavity Boring 5, seat repair: the pressure limiting valve ball valve and plunger valve two. Spherical valve seat wear, a ball placed on the seat, and then gently tap the ball with a metal rod until the ball valve and valve seat se