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CAD版本图纸，共6张
工序卡一套
过程卡一套

目   录

中文摘要 1
英文摘要 1
引    言 2
1零件分析 3
 1.1零件的功用 3
 1.2零件的技术分析 3
 1.3零件的工艺分析 3
2工艺规程的编制及参数的确定 5
 2.1确定毛坯的制造形式 5
 2.2基准面的选择 5
 2.3 制定工艺路线 6
3确定机械加工余量，工序尺寸及毛坯尺寸 10
4确定切削用量及基本工时 12
5夹具设计 29
 5.1问题提出 29
 5.2夹具设计 29
  5.2.1定位基准的选择 29
  5.2.2切削力及夹紧力计算 29
  5.2.3夹紧装置的选择与设计 30
  5.2.4夹具零件的设计 31
  5.2.5夹具体的设计 31
结    论 32
参考文献 33
致    谢 34                   

摘  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镗大头孔夹具设计，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: 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 reduce 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 use 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, 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 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