设计简介
摘 要
尾架体是车床上的重要的部件之一，是车床上用以支撑轴类零件车削加工和实施钻孔的主要车床附件。本文针对某类给定的尾架体进行了加工工艺与工装的设计，完成了以下工作：
1、概述了尾架体的技术和现状发展；
2、对尾架体进行了工艺分析；
3、编制了尾架体的工艺规程，完成了其工序卡的设计；
4、针对工艺中的两个重要工序，设计完成了一套镗孔夹具和一套钻孔夹具，包括定位元件，夹紧机构、对刀块、夹具体的设计并分析了定位误差。
关键词 设计；工装；工艺；尾架体
尾架体是车床上的重要的部件之一，是车床上用以支撑轴类零件车削加工和实施钻孔的主要车床附件。本文针对某类给定的尾架体进行了加工工艺与工装的设计，完成了以下工作：
1、概述了尾架体的技术和现状发展；
2、对尾架体进行了工艺分析；
3、编制了尾架体的工艺规程，完成了其工序卡的设计；
4、针对工艺中的两个重要工序，设计完成了一套镗孔夹具和一套钻孔夹具，包括定位元件，夹紧机构、对刀块、夹具体的设计并分析了定位误差。
关键词 设计；工装；工艺；尾架体
Abstract
stalk spare parts, the car pares to process the main lather enclosure that drills a hole with implementation.This text aims at a certain the tail body giving certainly carried on to process the design that craft and work pack and completed once work:
1．All said a tail the technique and present condition development of the body;
2．Carried on craft analysis to the tail body,
3．Drew up a tail body of craft regulations, completed the design of its work preface card;
4．Aim at a craft in of some important work preface, designed to complete a set of Xian slot tongs, including fixed position component, clipped tight organization, to the knife piece, clip a concrete design and analyzed a fixed position error margin.
Keywords：design;clamping;craft;tailstock
目 录stalk spare parts, the car pares to process the main lather enclosure that drills a hole with implementation.This text aims at a certain the tail body giving certainly carried on to process the design that craft and work pack and completed once work:
1．All said a tail the technique and present condition development of the body;
2．Carried on craft analysis to the tail body,
3．Drew up a tail body of craft regulations, completed the design of its work preface card;
4．Aim at a craft in of some important work preface, designed to complete a set of Xian slot tongs, including fixed position component, clipped tight organization, to the knife piece, clip a concrete design and analyzed a fixed position error margin.
Keywords：design;clamping;craft;tailstock
第一章 绪论............................................ 1
1.1 课题的背景及介绍......................................... 4
1.2 同类研究国内外工作现状、存在问题......................... 4
1.3 研究目标、内容和拟解决的关键问题......................... 4
1.4 拟采取的研究方法、步骤、技术路线......................... 4
第二章 机械加工工艺规程的设计.............................. 4
2.1 零件毛坯的确定........................................... 4
2.1.1 毛坯种类选择......................................... 4
2.1.2 确定毛坯的加工余量................................... 4
2.2 机械加工路线的拟定....................................... 5
2.2.1 选择零件表面的加工方法............................... 5
2.2.2 工序定位基准的选择................................... 6
2.2.3 工序数目和顺序的确定................................. 6
2.2.4 确定工序间的加工余量和工序尺寸及其公差............... 8
2.3 机床和工艺装备的选择和设计.............................. 13
2.3.1机床的选择.......................................... 13
2.3.2刀具的选择.......................................... 13
2.3.3量具的选择.......................................... 13
2.3.4夹具的选择和设计.................................... 14
2.4 切削用量的选择.......................................... 14
2.4.1背吃刀量的选择...................................... 14
2.4.2进给量f的选择...................................... 14
2.4.3切削速度的选择...................................... 15
2.4.4各代表工序的切削用量的选择.......................... 15
2.5 填写机械加工工艺文件.................................... 23
2.5.1机械加工工艺过程卡片................................ 23
2.5.2机械加工工序卡片.................................... 23
2.5.3检验卡片............................................ 23
第三章 专用夹具的设计................................. 24
3.1 镗Φ75孔夹具设计........................................ 24
3.1.1 定位基准和定位元件的选定........................... 24
3.1.2定位元件的选择....................................... 25
3.2 镗套的选择和设计.......................................... 25
3.2.1 导向装置的形式与特点................................ 25
3.2.2 镗套的材料.......................................... 26
3.3 镗杆的设计................................................ 26
3.3.1 镗杆的结构.......................................... 26
3.3.2 镗杆端部导向结构形式................................ 26
3.3.3 镗刀与镗刀孔的结构.................................. 27
3.3.4 镗杆的尺寸.......................................... 28
3.3.5 镗杆的材料.......................................... 28
3.4 夹紧装置的设计............................................ 30
3.4.1 夹紧装置的组成...................................... 30
3.4.2 对夹紧装置的要求.................................... 30
3.5 夹紧力的确定.............................................. 31
3.6 夹具体的设计.............................................. 32
3.7 夹具精度及定位误差分析.................................... 32
3.8 加工孔Φ24夹具设计........................................ 32
3.8.1定位基准的选择...................................... 33
3.8.2切削力的计算与夹紧力分析............................ 34
3.8.3夹紧元件及动力装置确定.............................. 35
3.8.4钻套、衬套、钻模板及夹具体设计...................... 35
3.8.5夹具精度分析........................................ 36
第四章 结论................................................... 39
参考文献....................................................... 40
致谢............................................................ 41
