文档介绍：摘要零件的加工工艺编制, 在机械加工中占有非常重要的地位, 零件工艺编制得合不合理, 这直接关系到零件最终能否达到质量要求; 夹具的设计也是不可缺少的一部分, 它关系到能否提高其加工效率的问题。因此这两者在机械加工行业中是至关重要的环节。阀盖零件的主要加工表面为孔和外圆表面。外圆表面加工根据精度要要求可选择车削和磨削。孔加工方法的选择比较复杂, 需要考虑零件的结构特点、孔径大小、长径比、精度和粗糙度要求以及生产规模等各种因素。对于精度要求较高的孔往往还要采用几种不同的方法顺次进行加工。本次设计的油缸,为保证孔的精度和表面质量将先后经过粗镗、半精镗、精镗和滚压等四道工序加工。在机床上对零件进行机械加工时, 为保证工件加工精度, 首先要保证工件在机床上占有正确的位置, 然后通过夹紧机构使工件在正确位置上固定不动, 这一任务就是由机床夹具完成。对于单件、小批量生产, 应尽量使用通用夹具, 这样可以降低工件的生产成本。但是由于通用夹具适用各种工件的装夹, 所以夹紧时往往比较费时间, 并且操作复杂, 生产效率低, 也难以保证加工精度,为此需设计专用夹具。关键词:工艺设计、基准选择、切削用量、定位误差 ABSTRCT ponents craft establishment, holds the very important status inthe machine-finishing, ponents craft establishes reasonable, whether dothis direct ponents achieve the quality requirement finally; Jig's design isalso anessential part, whether does itrelate raises its processing efficiency the question. Therefore this both inthe machine-finishing profession are the important links. ponents main processing surface for hole and outer annulus surface. The outer annulus face work needs torequest according tothe precision tobepossible tochoose the turning and the grinding. The hole processing method's choice plex, needs toconsider ponents the unique feature, the aperture size, the length todiameter ratio, the precision and roughness request aswell asthe scale of production and sooneach kind offactor. Often must use several different methods regarding the accuracy requirement high hole tocarry onthe processing inorder. This design's cylinder, will pass through half finished boring, the finished boring, the fine articulation and the trundle essively for the guarantee hole's precision and the surface quality and soonfour working procedure processings When the engine bed carries onthe machine-finishing ponents, isguaranteed that the work piece working accuracy, first needs toguarantee the work piece holds the correct position onthe engine bed, then causes the work piece inthe correct position through the anization fixed motionless, this duty pletes bythe engine bed jig. Regard