毕业设计--连杆加工工艺规程及精铣连杆盖结合面夹具设计

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1、 1 摘摘 要要 本毕业设计课题是制订 S195 型柴油机发动机连杆零件的机械制造工艺规程 及粗铣连杆盖结合面夹具设计， 目的是希望能在降低产品的生产成本的同时又可 以制造出品质优良的产品，在最少的工序或加工时间中制造出满足形状、尺寸、 精度、表面粗糙度等要求的产品。设计应在保证加工精度的同时，又利用工件装 卸的合理夹具结构，并有一定实用价值。由于理论知识与实践经验的有限。我将 考虑采用普遍性强的加工方法， 但该零件的机械加工工艺规程可以适当采用较为 先进的制造工艺方法和专用机床设备，刀具和量具。本课题的主要内容是分析零 件的技术条件画出零件图及毛坯图。拟定合理的工艺路线，粗镗大头孔夹具草图

2、及夹具图。 本设计采用了连杆体与连杆盖分离锻造， 并制定相对合理的工艺路线。 在夹具设计部分，以大小头孔端面、大头孔工艺凸台及小头孔为定位基准，符合 定位原理并达到定位目的，夹紧机构则采用螺旋夹紧机构，亦即达到夹紧效果。 关键词关键词: : 连杆；工艺规程；夹具设计；CAD 图 Abstract The graduation design topic is formulating S195 diesel engine connecting parts manufacturing procedure and boring head hole fixture design, want to red

3、uce production cost in the also can produce good quality products at least, the process of manufacturing and processing time meet the shape, size, accuracy and surface roughness and requirements of the product. Design should guarantee the machining accuracy of workpiece loading and unloading, and us

4、e of reasonable fixture structure, and has certain practical value. Due to the theoretical knowledge and practical experience. I will consider using universal stronger processing method, but the machining procedure can appropriate USES advanced manufacturing technology and special machine equipment,

5、 tools and measuring tool. The main content of this project is to analyze the technical conditions of the parts and painted parts blank. The plan was reasonable process route, big hole clamp sketches and boring fixture. This design USES the connecting rod body and connecting separated, and formulate

6、 relative reasonable forging process. In part, the size of fixture design with head big hole hole surface, small head for convex and locating datum, and achieve the goal orientation positioning principle, clamping mechanism using spiral clamping institutions, i.e. reached clamping effect. Key words: Connecting rod, Procedure, Fixture design, CAD drawings 连杆加工工艺规程及精铣连杆盖结合面夹具设计 2 引引 言言 这次设计是我们在学校的最后一次设计了。它跟以往的课程设计有所不同， 这次的设计规模大，时间长，是我们的毕业设计。这也是我们在毕业后踏入社会 之前对所学各课程的一次深入的综合性的总复习，也是一次理论联系实际的训 练