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连杆的机械加工工艺及夹具设计毕业论文.doc

发布:2016-04-16约1.87万字共31页下载文档
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            内容摘要 连杆是柴油机的主要传动件之一,本文论述了连杆的加工工艺及其夹具的设计。连杆的尺寸精度、形状精度以及位置精度的要求都很高,而连杆的刚性比较差,容易产生变形,因此在安排工艺过程时,就需要把各主要表面的粗精加工工序分开。逐步减少加工余量、切削力及内应力的作用,并修正加工后的变形,就能最后达到零件的技术要求。 机械加工工艺是企业上品种、上水平、加速产品更新,提高经济效益的技术保障。然而夹具有事制造系统的重要部分,工艺对夹具的要求也会提高,专用夹具、成组夹具、组合夹具和随行夹具都朝着柔性化、自动化、标注化、通用化和高效化方向发展以满足加工要求。所以对机械的加工工艺及夹具设计具有十分重要的意义。 关键词:连杆 加工工艺 夹具设计                  Abstract                       Author: Guo qianqian Tutor:Li ling   Connecting rod is one of the main transmission parts of diesel engine, this paper discusses the processing technology of connecting rod and the design of fixture. Connecting rod size accuracy, the accuracy requirement of the shape and position precision is very high, and the rigidity of the connecting rod is poorer, prone to deformation, therefore in the arrangement of technological process, you need to separate the rough finish machining process on the surface of the main. Gradually reduce machining allowance, cutting force and the role of internal stress, and correct processing after deformation, can finally achieve the technical requirements of parts. Machining process on varieties, is the enterprise level, product updates faster, improve the economic benefit of technical support. Fixture occupy an important part of manufacturing system, however, technology will also increase to the requirement of fixture and special fixture, group clamps, modular fixture and pallet toward flexible, automation, tagging, generalization and highly efficient direction to meet the processing requirements. So the mechanical processing technology and fixture design is of great significance. Key words: connecting rod processing technology fixture design              目 录 摘要 I Abstract II 第1章 绪论 1 1.1 连杆的结构特点 1 1.2 本次设计内容 2 3 2.1 零件的工艺分析 3  2.1.1 产品结构和工艺分析 3  2.1.2 平面加工 3   2.1.3 孔加工 3  2.1.4 技术要求 3 2.2 毛坯的确定 5  2.2.1 有关设计条件的说明 5  2.2.2 毛坯的材料 6  2.2.3 制坯方法的确定 6 2.3连杆工件的定位基准和定位方案分析 7  2
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