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参数化组
摘要：随着近些
合夹具元件建模及机体主轴钻孔夹具设计
年来数控机床、加工中心、柔性制造单元、柔性制造系统
等现在加工设备的广泛应用，使传统的机械加工的制造方法发生了重大变革；而数字化的设备功能的扩大给夹具的设计提出了更高的要求。因此，一套行之有效的夹具方案计算机辅助设计系统也就应运而生了，而这套系统可以提高工作效率和实现快速修改。本论文完成了以下三方面的研究内容。
1.柔性组合夹具元件参数化图库建立。本文讲述了组合夹具元件参数化设计的基本方法，并最终将组合夹具元件参数化。
2.柔性组合夹具方案设计系统的构建。本文讲述了柔性组合夹具方案设计系统构造的基本要素及最终成型的系统。
3.验证柔性组合夹具方案计算机辅助设计系统的有效性。本文以S195柴油机机体主轴钻孔组合夹具为验证工具对该系统进行了有效性验证。
关键词：参数化组合夹具；夹具元件建模；SOLIDWORKS；虚拟装配；计算机
辅助设计系统
I
Parametric Modeling for Modular Fixture Elements and the
Design of Body Drilling
Abstract: In recent years, products updates faster and the demand of product is variety. This requires products have a greater flexibility. Therefore, a computer-aided modular fixture design system is necessary. This paper completed the following three areas of content.
First, construction of graphics library based on parametric modeling for modular fixture elements. Modular Fixtures consist of basic parts, supporting parts, locate parts, pressed parts, fasteners, components of large holes, medium holes on components, etc. we can completed the parametric modeling effectively based on SOLIDWORKS platform.This paper completed the medium-sized holes parameterized components in storage.
Second，the establishment of computer-aided modular fixture design system. SOLIDWORKS software and the computer are the supporting of the system. The principles of the modular fixture designing and assembly are the control rules. The system can invoke the component series and will produce a set of modular fixture program
Third，verifying the computer-aided modular fixture design system. This paper use this computer-aided modular fixture design system design the S195 diesel engine spindle boring combination fixture program. Based on SOLIDWORKS platform, this paper makes use of the virtual assembly of SOLIDWORKS to design a modular fixture program. This paper verify the validity of computer-aided design system.
Keywords：Design system; Modular Fixture; Parametric ; SOLIDWORKS; virtual assembly
II
目 录
第1章 绪论 ..................................................... 1
1.1. 课题研究背景 .............................................. 1
1.1.1. 专用机床夹具的不足 .................................. 1 1.1.2. 柔性组合夹具的优势 .................................. 1 1.1.3. 柔性组合夹具拼合困难 ................................ 1 1.1.4. 柔性组合夹具元件参数化是前提 ........................ 1 1.2. 课题研究目标和意义 ......................................... 1
1.2.1. 研究的目标............................................ 2 1.2.2. 研究的意义............................................ 2 1.3. 国内外研究现状及发展趋势 ................................... 3
1.3.1. 国内研究现状.......................................... 3 1.3.2. 国际研究现状.......................................... 4 1.4. 课题研究内容及技术路线 ..................................... 5
1.4.1. 研究内容.............................................. 5 1.4.2. 技术路线.............................................. 6 1.5. 论文结构 ................................................... 6 本章小结 ........................................................ 7 第2章 定位元件参数化建库及系统构建 ............................... 8
2.1. 基于SOLIDWORKS平台定位元件参数化建库设计方法 .............. 8 2.2. 柔性组合夹具元件简介 ....................................... 9 2.3. 元件参数化设计 ............................................ 10 2.4. 定位元件参数化图库建立示例 ................................ 10 2.5. 图库建立中的注意问题 ...................................... 15 本章小结 ....................................................... 16 第3章 工艺规程优化 .............................................. 17
3.1. S195柴油机机体工艺分析.................................... 17 3.2. 零件加工工艺方案比较 ...................................... 17
3.2.1. 工艺路线方案一....................................... 17 3.2.2. 工艺路线方案二....................................... 20 3.2.3. 关键工序加工方案分析比较............................. 23 3.3. 夹具设计指定工序主轴钻的详细设计 .......................... 24
3.3.1. 机床、刀具、量具的选择............................... 24 3.3.2. 切削用量的选择（计算）............................... 24 本章小结 ....................................................... 26 第4章 柔性组合夹具装配设计 ...................................... 27
4.1. SOLIDWORKS平台的虚拟装配.................................. 27 4.2. 柔性组合夹具拼装的基本理论 ................................ 27 4.3. 机体钻孔柔性组合夹具设计 .................................. 29
4.3.1. 定位方案分析......................................... 29 4.3.2. 夹紧方案设计......................................... 29 4.3.3. 夹紧力计算........................................... 30 4.3.4. 定位误差的计算....................................... 30
4.4. 机体钻孔柔性组合夹具虚拟装配设计 .......................... 31 本章小结 ....................................................... 33 注释和参考文献 ................................................... 34 谢 辞 ........................................................... 35