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目录前言···················································································································································1第一章设计任务概述···················································································································21.1设计的主要内容················································································································21.2设计的指导思想················································································································2第二章零件的结构工艺性分析··································································································32.1零件的作用······················································································································32.2零件的结构分析·············································································································32.3零件材料及热处理··········································································································32.4生产纲领与生产类型·································································································42.5零件的工艺分析··················································································································72.6孔和平面的加工顺序··········································································································72.7孔系加工方案选择··············································································································8第三章毛坯的确定·························································································································93.1确定毛坯类型····················································································································93.2毛坯的制造方法··············································································································93.3毛坯形状和尺寸··············································································································103.4毛坯图···················