文档介绍：目录一生产实****目的和要求··········································2(一)生产实****的目的·········································2(二)生产实****的要求·········································2二一拖简介···················································3三生产实****日程安排···········································4四各生产实****内容·············································5(一)安全教育················································5(二)曲轴制造工艺简介········································6(三)齿轮加工厂参观·······································11(四)第一动力机械有限公司·································14(五)第一装配厂···········································14(六)关于模具的讲座·······································15(七)汇德工装厂···········································16(八)工程机械有限公司·····································17(九)发动机箱体生产线·····································18(十)第三装配厂···········································19(十一)中铝洛阳铜业有限公司·······························19(十二)中信重工···········································20(十三)燃油喷射有限公司···································21(十四)福莱格车身有限公司·································21五专题·····················································23(一)典型零件的工序分析·····································23(二)两个典型机械结构草图及原理分析·························25(三)典型夹具草图···········································26六生产实****心得体会·········································27曲轴制造工艺简介■:将活塞的往复运动转变为旋转运动,获得转矩。:各种交变应力复杂作用,活塞的压缩比为18~22倍。:要求强度、刚度、韧性和耐磨性都比较高的材料,一般用精选的45#钢(%~%)。为达到使用要求,曲轴的毛坯采用模锻,然后正火处理获得合适硬度(225HB),在精加工之前用中高频淬火。■曲轴构造(结构示意图见下页):全支承:曲轴中每两个连杆颈之间都有一个主轴颈;具有刚度好、成本高、体积大等特点;例如采油机中的曲轴。非全支承:曲轴中只有一个主轴颈;具有成本低、体积小、刚性低、强度低等特点;例如小型汽油发动机的曲轴。:四缸发动机,曲拐转180°有一个缸做功,转720°每个缸做功一次。■,、5侧板,(↗),、B、D、E主轴颈和前后端(多把刀同时车),两端顶住,中间***、、,、2、8侧板,粗车a、、4、5、6侧板,粗车b、(↗)、(工艺缺口),-(↗)、(深