一拖实习报告(川大机制)※.doc

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1、目　录一生产实习目的和要求··········································２（一）生产实习的目的·········································２（二）生产实习的要求·········································２二　一拖简介···················································３三　生产实习日程安排·····························

2、··············４四　各生产实习内容·············································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·······································１１20/20（四）第一动力机械有限公司··········

3、·······················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··············

4、·······················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···································２１20/20（十四）福莱格车身有限公司············

5、·····················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　生产实习心得体会···············

6、··························２７（一）曲轴制造工艺简介■曲轴的作用1.主要功用：将活塞的往复运动转变为旋转运动，获得转矩。2.工作条件：各种交变应力复杂作用，活塞的压缩比为18~22倍。3.曲轴的材料：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（C含量为0.42%~0.47%）。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。20/20■曲轴构造（结构示意图见下页）1．曲轴分类：全支承：曲轴中每两个连杆颈之间都

7、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。2．曲拐的排列方式：四缸发动机，曲拐转180°有一个缸做功，转720°每个缸做功一次。20/2020/20■曲轴工艺5．铣两端面，打中心孔10．切4、5侧板，精车C主轴颈15．校直（↗0.2），为磨削作准备20．粗磨C主轴颈25．粗车A、B、D、E主轴颈和前后端（多把刀同时车），两端顶住，中间轮盘在轴颈C处驱动35．粗磨A、E主轴颈40．粗磨B

8、、D主轴颈45．铣第8侧板定位面，扩轴承孔50．切1、2、8侧板，粗车a、d连杆颈55．切3、4、5、6侧板，粗车b、c连杆颈60．校直（↗0.2）65．粗磨4个连杆颈70．精车法兰、油封及凹座侧面80．开四个Φ8.4斜油孔85．在法兰上铣缺口（工艺缺口）90．在侧板钻4个Φ31.4油孔95．在油孔上扩孔倒角，钻销孔105．在连杆侧板攻丝4-m33X1.5120．铣回油螺纹140．校直（↗0.2）2