机械制造设计及其自动化专业精品毕业设计摘要目录基于普通机床的后托架及夹具的设计开发

1、基于普通机床的后托架及夹具的设计开发摘要：机床后托架的是机床上的一个重要零件，因为其零件尺寸较小，结构形状也不是很复 杂复杂。但因为其尺寸精度、几何形状精度和相互位置精度，以及各表面的表面质量均影响 机器或部件的装配质量，进而影响其性能与工作寿命，因此它的加工工艺的确设计也是非常 关键和重要的。在制定工艺过程中，可将其分为两部分，即工艺设计部分和夹具设计部分。要确定各工 序的安装工位和该工序需要的工步，加工该工序的机车及机床的进给量，切削深度，主轴 转速和切削速度，该工序的夹具，刀具及量具，还有走刀次数和走刀长度，最后计算该工 序的基本吋间，辅助吋间和工作地服务吋间。对于夹具的设计，车床后托架

2、镇、铳、钻等 工序使用了专用夹具和定位方案，此类夹具的特点是针对性强、结构紧凑、操作简便、生 产率高。从而保证夹具操作方便、夹紧力可靠、使用安全、并有合理的装卸空间。本设计 中将书本理论和实际使用要求相结合，完成了车床后托架的加工工艺规程的设计。关键词： 工序工艺工步定位方案夹紧力based on the general machine tool and fixture brackets after the design anddevelopmentabstract: bracket machine after machine is an important part, because of

3、its smaller size components, structural shape is not very complicated complex. but because of its size precision, accuracy and geometry mutual positioning accuracy, and the surface quality of the surface have affected parts of the machine or assembly quality, thereby affecting its performance and wo

4、rking life, it is the design of processing is also a very crucial and important.in the development process, can be divided into two parts, namely, process design and fixture design of the part. to identify the processes of the installation process and the need for further processing and the process

5、of locomotive machine feed rate, depth of cut, and cutting speed spindle speed, the process of fixture, knives and measuring tools, and walk the knife cutting the number and length of the final calculation of the basic processes of the time, work time and support to serve time. fixture for the desig

6、n, bracket after boring lathe, milling, drilling processes for the use of the fixture, the characteristics of such fixture is targeted strong, compact, easy to operate, high productivity. thus ensuring fixture easy to operate, reliable clamping, the use of safe and reasonable working space. the desi

7、gn will use books theoretical and practical requirements of the integration of the lathe after the completion of the processing order bracket design.keywords:the process .worker one, worker's step , orient the scheme，clamp strength第一章引言11. 1加工工艺的现状和发展趋势21. 2 ca6140机床后托架加工工艺设计的目的、内容和要求21. 2.1设计的日

8、的21. 2.2设计的内容21. 2.3设计的要求3第二章ca6140机床后托架的加工工艺的整体设计 42. 1 ca6140机床后托架的工艺要求及其分析42. 2 ca6140机床后托架的工艺要求及其分42. 2.1ca6140机床后托架的技术要求42. 3 ca6140机床后托架的加工工艺过程52. 4确定ca6140机床后托架的各表面加工方案52. 4.1在选择各表而及孔的加工方法时，要综合考虑以下因素52. 4.2平面的加工62. 4.3孔的加工方案62. 5确定各加工部位的定位基准62. 5.1粗基准的选择62. 5.2精基准选择的原则72. 6制订工艺路线72. 6.1工序的合理组

9、合82. 6.2工序的集中与分散82. 6.3加工阶段的划分92. 6.4加工工艺路线方案的比较102. 6.5设计加工工艺卡片142. 7机床后托架偏差，加工余量，工序尺寸及毛坯尺寸的确定182. 7.1毛坯的结构工艺要求182. 7.2机床后托架的偏差计算188确定切削用量及基本工时212. 8. 1工序一粗、精铳底面212.8.2工序二 粗、半精、精铿ca6140侧面三杠孔222.8.3工序三钻顶面四孔282.8.4工序四钻侧面两孔312. 9时间定额计算及生产安排322.9.1粗、精铳工件底面332.9.2铿侧面三个杠孔332. 9.3钻工件顶面四孔34第三章专用夹具设计363. 1铳平面夹具的设计363. 1.1检查原始材料363. 1.2选择定位基准363. 1.3切削力及夹紧分析计算363. 1.4误差分析与计算373. 1.5夹具设计和操作的简要说明373. 2镇孔夹具的设计383. 2.1研究原始质料383. 2.2定位基准的选择3