设计简介
摘要
夹具是机械加工不可缺少的部件，在机床技术向高速、高效、精密、复合、智能、环保方向发展的带动下，夹具技术正朝着高精、高效、模块、组合、通用、经济方向发展。
该论文的设计任务是加工零件（A型齿轮油泵泵体）上的四个孔，。由于该零件属于大批量生产，钻孔精度要求较高，所以设计一个专用的钻床夹具，保证零件的加工质量。由于夹具的利用率高，经济性好，使用元件的功能强并且数量少，配套费用低，降低了生产成本；采用夹紧装置，缩短停机时间，提高生产效率。
设计车床夹具，首先要仔细分析加工零件的技术要求，运用夹具设计的基本原理和方法，拟定夹具设计方案；在满足加工精度的条件下，合理的进行安装、定位、夹紧；在完成夹具草图后，进一步考虑零件间的连接关系和螺钉、螺母、定位销等的固定方式，设计合理的结构实现各零部件间的相对运动；根据各零件的使用要求，选择相应的材料。
关键词：工艺，工序，切削用量，夹紧，定位，误差
Machining fixture is an indispensable component, the development of high speed, high efficiency, precision, complex, intelligent, environmentally friendly direction in machine technology driven, fixture technology is moving towards high precision, high efficiency, module, combination, general, economic development.
The design task of the thesis is to machining parts (A gear pump) four holes,. Because this is a part of mass production, high drilling precision, so the design of a special drilling jig, ensure the machining quality of parts. Because the fixture utilization rate is high, the economy is good, the use of functional components and a small number of supporting, low cost, reduce the production cost; the clamping device, reduce downtime, improve production efficiency.
The design of drilling jig, first to require careful analysis of parts of the processing technology, using the basic principle and method of fixture design, the proposed design scheme of fixture; in the condition of satisfying the processing precision, reasonable installation, positioning, clamping fixture; after the completion of a sketch, consider the fixed connection relations between parts and screws, nut, a positioning pin, the rational design of the structure to realize the relative motion between the parts; according to the requirements of use of parts, select the appropriate materials.
Keywords: process, process, cutting, clamping, positioning, error
目录
1 序言... 1
1.2 了解夹具总体设计的要求.... 1
1.3 钻床的发展趋势.... 1
1.4钻床夹具的概述.... 2
1.4.1钻床夹具的特点.... 2
1.4.2钻床夹具的主要类型.... 3
1.4.3钻模类型选择.... 3
1.4.4钻套的选择.... 3
1.4.5钻模板类型.... 4
2 零件的分析... 5
2.1零件的作用... 5
2.2零件图... 5
2.3零件的工艺分析... 6
2.4工艺规程设计... 6
2.5确定毛坯种类... 6
2.6基面的选择... 7
2.7制定工艺路线... 7
2.8连杆的偏差，加工余量，工序尺寸及毛坯尺寸的确定... 8
2.8.1毛坯的结构工艺要求... 8
2.8.2连杆的偏差计算... 9
2.9确定切削用量及基本工时（机动时间）... 9
3 车￠25孔夹具设计... 18
3.1 车床夹具设计要求说明... 18
3.2车床夹具的设计要点... 18
3.3 定位机构... 19
3.4夹紧机构... 20
3.5零件的车床夹具的加工误差分析... 20
3.6 确定夹具体结构尺寸和总体结构... 21
3.7 零件的车床专用夹具简单使用说明... 22
总结... 23
参考文献... 24
致 谢... 25
夹具是机械加工不可缺少的部件，在机床技术向高速、高效、精密、复合、智能、环保方向发展的带动下，夹具技术正朝着高精、高效、模块、组合、通用、经济方向发展。
该论文的设计任务是加工零件（A型齿轮油泵泵体）上的四个孔，。由于该零件属于大批量生产，钻孔精度要求较高，所以设计一个专用的钻床夹具，保证零件的加工质量。由于夹具的利用率高，经济性好，使用元件的功能强并且数量少，配套费用低，降低了生产成本；采用夹紧装置，缩短停机时间，提高生产效率。
设计车床夹具，首先要仔细分析加工零件的技术要求，运用夹具设计的基本原理和方法，拟定夹具设计方案；在满足加工精度的条件下，合理的进行安装、定位、夹紧；在完成夹具草图后，进一步考虑零件间的连接关系和螺钉、螺母、定位销等的固定方式，设计合理的结构实现各零部件间的相对运动；根据各零件的使用要求，选择相应的材料。
关键词：工艺，工序，切削用量，夹紧，定位，误差
Machining fixture is an indispensable component, the development of high speed, high efficiency, precision, complex, intelligent, environmentally friendly direction in machine technology driven, fixture technology is moving towards high precision, high efficiency, module, combination, general, economic development.
The design task of the thesis is to machining parts (A gear pump) four holes,. Because this is a part of mass production, high drilling precision, so the design of a special drilling jig, ensure the machining quality of parts. Because the fixture utilization rate is high, the economy is good, the use of functional components and a small number of supporting, low cost, reduce the production cost; the clamping device, reduce downtime, improve production efficiency.
The design of drilling jig, first to require careful analysis of parts of the processing technology, using the basic principle and method of fixture design, the proposed design scheme of fixture; in the condition of satisfying the processing precision, reasonable installation, positioning, clamping fixture; after the completion of a sketch, consider the fixed connection relations between parts and screws, nut, a positioning pin, the rational design of the structure to realize the relative motion between the parts; according to the requirements of use of parts, select the appropriate materials.
Keywords: process, process, cutting, clamping, positioning, error
目录
1 序言... 1
1.2 了解夹具总体设计的要求.... 1
1.3 钻床的发展趋势.... 1
1.4钻床夹具的概述.... 2
1.4.1钻床夹具的特点.... 2
1.4.2钻床夹具的主要类型.... 3
1.4.3钻模类型选择.... 3
1.4.4钻套的选择.... 3
1.4.5钻模板类型.... 4
2 零件的分析... 5
2.1零件的作用... 5
2.2零件图... 5
2.3零件的工艺分析... 6
2.4工艺规程设计... 6
2.5确定毛坯种类... 6
2.6基面的选择... 7
2.7制定工艺路线... 7
2.8连杆的偏差，加工余量，工序尺寸及毛坯尺寸的确定... 8
2.8.1毛坯的结构工艺要求... 8
2.8.2连杆的偏差计算... 9
2.9确定切削用量及基本工时（机动时间）... 9
3 车￠25孔夹具设计... 18
3.1 车床夹具设计要求说明... 18
3.2车床夹具的设计要点... 18
3.3 定位机构... 19
3.4夹紧机构... 20
3.5零件的车床夹具的加工误差分析... 20
3.6 确定夹具体结构尺寸和总体结构... 21
3.7 零件的车床专用夹具简单使用说明... 22
总结... 23
参考文献... 24
致 谢... 25
