摘 要随着科技的发展，机械制造行业已经是我国技术进步和社会发展的支柱产业之一。无论是传统产业，还是新兴的机械制造产业，都离不开形式各样的机械制造设备。本次毕业设计的内容主要内容就是对CA6140机床拨叉的工艺规程制定和对其中孔及若干平面加工工序的夹具设计进行研究和探讨。在工艺规程编制方面，主要通过仔细分析拨叉零件图和相关技术要求，查阅零件相关资料，考虑了零件的工艺结构要求、批量生产要求、经济性、可行性等多方面因素，最终安排工序，并完成加工，其中包括各道工序的加工方法，机床、刀具、夹具、辅具、量具的选择，基准面的选取，定位和夹紧方案的拟定，并将其编入工序卡片，清晰明了的表达出了整个加工过程。另外，在专用夹具设计方面，主要对一孔、一平面的加工工序进行了夹具方案的分析，计算和最终完成设计任务。关键词：拨叉；工艺路线；定位与夹紧；专用夹具设计IIAbstractWith the development of science and technology, machinery manufacturing industry of China has been technological progress and social development of pillar industries. Whether in traditional industries or new industries, it is inseparable from a wide range of machinery and equipment. This graduation of content which is the study about the protocol development process and the fixture design of the hole and some plane processing procedure. In terms of process rules, primarily through a careful analysis of the product parts and related technical requirements, check the parts relevant information considered part of the process of structural requirements, batch, and economics, feasibility, and more factors. The final arrangements for the operations to finish processing, including the operations of processing method, machine tools, tooling, fixtures, assistive devices, measurement apparatus selection, select datum, positioning and clamp authoring, and process card, clarity of expression out the whole processing procedure. In addition, in fixture design, the main design about a hole, a flat and a groove machining process has been analysised, computation and finally to complete the design task.Key words: Plectrum; process route; positioning and clamping; dedicated fixture designIIII目 录摘 要IAbstractII第1章 绪论11.1 夹具设计的意义11.2 夹具设计研究概述21.2.1 夹具的定义21.2.2 夹具发展概况21.2.3 夹具设计要解决的主要问题31.3 夹具的功能41.4 夹具组成41.4.1 夹具的基本组成部分41.4.2 夹具的其他组成部分51.5 夹具的分类51.5.1 按夹具的通用特性分类51.5.2 按夹具使用的机床分类51.6 夹具使用优点71.7 夹具设计要求71.7.1 夹具设计基本要求71.7.2 生产对其提出的新要求81.8 夹具设计特点81.9 现代夹具的发展发向9第2章 工艺规程的编制102.1 零件的分析102.1.1 零件的作用102.1.2 零件的工艺分析112.2 确定毛坯的制造形式122.3 基面的选择132.4 制定工艺路142.5 选择加工设备及刀具、夹具、量具152.6 机械加工余量、工序尺寸及毛坯尺寸的确定162.7 确立切削用量及基本工时19第3章 夹具设计373.1 工序30的夹具设计373.1.1 问题的提出373.1.2 夹具设计373.1.3 定位误差的分析403.1.4 夹具设计及操作的简要说明403.2 工序50的夹具设计403.2.1 问题的提出403.2.2 夹具设计413.2.3 定位误差的分析433.2.4 夹具设计及操作的简要说明433.3 工序70的夹具设计443.3.1 问题的提出443.3.2 夹具设计443.3.3 定位误差的分析473.3.4 夹具设计及操作的简要说明47第4章 机床夹具优化设计及经济效益484.1 优化设计分析484.1.1成组夹具成本484.1.2 优化设计的现实意义494.2 机床夹具柔性化494.3 机床夹具经济效益分析50结 论52致 谢53参考文献54ContentsAbstractChapter 1 Introduction11.1 The significance of the fixture design11.2 Fixture design research overview21.2.1 The definition of a fixture21.2.2 Fixture development21.2.3 Design of jigs and fixtures to solve the main problems 31.3 Functions of fixtures31.4 Fixture composition41.4.1 The basic components of fixtures41.4.2 The other component of the fixtures41.5 Fixture of classification51.5.1 According to the common characteristics of classification fixtures51.5.2 The machine tool used by fixture classification51.6 Use the advantages of fixtures61.7 Design of machine-tool fixtures71.7.1 Basic requirements for the design of fixtures71.7.2 Production on his proposed new requirements71.8 Fixture design characteristics81.9 Development of modern fixtures sent to9Chapter 2 The compilation of procedures102.1 Part of the analysis102.1.1 Part of the role102.1.2 Parts of the Process Analysis112.2 Determine the form of blank manufacturing122.3 The choice of base level132.4 Develop route14 2.5 Select the processing equipment and tooling, fixtures, measuring tools152.6 Allowance, dimensions and fur dimension162.7 Establishment of cutting and basic work19Chapter 3 Fixture design363.1 Fixture design of the third working procedure373.1.1 Problem373.1.2 Fixture design40 3.1.3 The analysis of positioning error40 3.1.4 Fixture design and a brief description of the operation403.2 Fixture design of the fifth working procedure403.2.1 Problem403.2.2 Fixture design413.2.3 The analysis of positioning error433.2.4 Fixture design and a brief description of the operation433.3 Fixture design of the seventh working procedure443.3.1 Problem443.3.2 Fixture design443.3.3 The analysis of positioning error47 3.3.4 Fixture design and a brief description of the operation 47Chapter 4 Fixture design optimization and economic benefits484.1 Optimal Design and Analysis484.1.1 Group fixture costs484.1.2 The practical significance of design optimization494.2 Flexible Machine Tool Fixture494.3 Economic Analysis of jigs and fi