2019一拖实习报告(川大机制)

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1、一拖实习报告(川大机制)　　目录　　一生产实习目的和要求··········································２生产实习的目的·········································２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安全教育················································５曲轴制造工艺简介········································６齿轮加工厂参观·······································１１第一动力机械有限公司·································１４第一装配厂·····················

3、······················１４关于模具的讲座·······································１５汇德工装厂···········································１６工程机械有限公司·····································１７发动机箱体生产线·····································１８第三装配厂···········································１９中铝洛阳铜业有限公司·

4、······························１９中信重工···········································２０燃油喷射有限公司···································２１福莱格车身有限公司·································２１五专题·····················································２３典型零件的工序分析·····································２３两

5、个典型机械结构草图及原理分析·························２５典型夹具草图···········································２６六生产实习心得体会·········································２７　　　　1/18　　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。为达到使

6、用要求，曲轴的毛坯采用模锻，然后正火处理获得合适硬度，在精加工之前用中高频淬火。　　■曲轴构造1．曲轴分类：　　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。　　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。　　2/18　　3/18　　■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，为磨削作准备20．粗磨C主轴颈　　2

7、5．粗车A、B、D、E主轴颈和前后端，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、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65．粗磨4个连杆颈　　70．精车法兰、油封及凹座侧面80．开四个Φ斜油孔　　85．在法兰上铣缺口90．在侧板钻4个Φ油孔95．在油孔上扩孔倒角，钻销孔105．在连杆侧板攻丝120．铣回油螺纹140．校直　　4/18　　145．去毛刺150．清洗、吹净150J．中间检验　　155．感应淬火160．校直16

8、5．精车轴前端　　170．半精磨A、E主轴颈175．精磨C主轴颈180．半精磨B、D主轴颈185．精磨A、E主轴颈190．