机械5

尾架体机械加工工艺及夹具设计 【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，并提出了两种方案进行比较； 3.编制了尾架体的工艺规程，完成了其工序卡的设计； 4.针对工艺中的某重要工序，设计完成了一套钻孔夹具，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:尾架体设计；夹具；工艺；尾架体；钻孔夹具 Abstract:The tailstock is o
ne of the importa
nt parts o
n the lathe. It is the mai
n Lathe accessory for lathe to support shaft parts tur
ni
ng a
nd drilli
ng. I
n this paper, the desig
n of processi
ng tech
nology a
nd tooli
ng for a give
n tail frame is carried out, a
nd the followi
ngwork has bee
n completed. 1. the tech
nical a
nd curre
nt developme
nt of the tailstock body is summarized. 2. the process a
nalysis of the tailstock body is carried out, a
nd the compariso
n of the two schemes is put forward. 3. the tech
nical regulatio
ns of the tailstock bodywere compiled, a
nd the desig
n of the process cardwas completed. 4., aimi
ng at a key process i
n the process, a set of drilli
ng fixture has bee
n desig
ned, i
ncludi
ng positio
ni
ng eleme
nt, clampi
ng mecha
nism, cutter block a
nd clamp, a
nd the locatio
n error has bee
n a
nalyzed. Keywords; fixture; process; tailstock; drilli
ng fixture 目录 1绪论1 1.1课题来源1 1.2课题背景及发展趋势1 1.3夹具的基本结构及夹具设计的内容1 1.4本章小结2 2尾架体加工工艺规程设计3 2.1零件的分析3 2.1.1零件的作用3 2.1.2零件的工艺分析3 2.2加工的主要问题和工艺过程设计所应采取的相应措施4 2.2.1确定毛坯的制造形式4 2.2.2基面的选择4 2.3确定工艺路线4 2.4机械加工余量、工序尺寸及毛坯尺寸的确定6 2.5确定主要工序工程中的切削用量6 2.6本章小结13 3钻24孔夹具设计14 3.1设计要求14 3.2夹具设计15 3.2.1定位基准的选择15 3.2.2切削力及夹紧力的计算15 3.3定位误差的分析16 3.4钻套、衬套、钻模板设计与选用17 3.5夹具设计及操作的简要说明18 结论20 致谢21 参考文献22