机械5

摘要 本文研究的是设计零件的工艺编制及编程，所用的图纸是学校指定的练习用图，设计零件的类型为轴类，加工设备的一般是以通用的数控车床为主。 首先分析设计零件的零件图，再介绍设计零件进行工艺编制时要注意的地方，然后确定毛坯形式，再对零件加工的工艺进行拟定、分析并对零件加工中的主要零件的工艺，对刀具的选择，切削用量的确定进行详细说明，最后再对零件的加工进行编程。 由于设计零件是轴类配合件，装夹时较难，加工难度大，它的精度要求又比较高。因此在安排工序的时候，需要注意各个工序的加工顺序及各工序加工时基准的选择。 关键词：工艺设计、编程、精度要求、数控车床 Abstract I
n this paper, the process of desig
ni
ng parts a
nd programmi
ng is studied, the drawi
ng used is the practice drawi
ng desig
nated by the school, the type of desig
n part is shaft class, the machi
ni
ng equipme
nt is ge
nerally based o
n the ge
neral
numerical co
ntrol lathe. The paper first a
nalyzes the part drawi
ng of the desig
n part, the
n i
ntroduces the place that should be paid atte
ntio
n towhe
n the desig
n part carries o
n the craft compilatio
n, the
n determi
nes the bla
nk form, the
n carries o
n the formulatio
n to the part processi
ng tech
nology, a
nalyzes a
nd carries o
n the tech
nology to the mai
n part i
n the part processi
ng, The selectio
n of cutti
ng tools a
nd the determi
natio
n of cutti
ng parameters are described i
n detail. Fi
nally, the programmi
ng of the machi
ni
ng of the parts is carried out. Because the desig
n part is shaft fit, it is difficult to assemble a
nd process, a
nd its precisio
n isvery high. Therefore,whe
n arra
ngi
ng the process,we should pay atte
ntio
n to the processi
ng seque
nce of each process a
nd the selectio
n of the sta
ndardwhe
n each process is processed. Keywords: process desig
n, programmi
ng, precisio
n requireme
nts, CNC lathe 目录 摘要II Abstract III 第一章绪论1 第二章数控CAM加工与CAXA软件简介2 2.1 CAM加工的特点与发展历程2 2.2 CAXA软件简介3 2.3自动编程的基本步骤3 第三章数控加工工艺5 3.1数控加工工艺的特点5 3.2数控加工工艺分析的主要内容5 3.3数控加工工序的设计7 3.4确定走刀路线和安排工步顺序7 3.5定位基准与夹紧方案的确定8 3.5.1夹具的选择8 3.5.2刀具的选择8 3.6确定加工用量9 第四章轴类零件数控加工的工艺分析10 4.1本零件的图纸分析10 4.2零件加工工艺分析12 4.3路线的确定14 4.4机床的合理选择14 4.4.1加工设备的选用15 4.4.2加工刀具的选用15 4.5工艺卡片的制定16 4.5.1数控加工工序卡片16 4.5.2零件一工艺卡片的制定17 4.5.3零件二工艺卡片的制定19 第五章数控编程21 5.1CAXA数控车软件介绍21 5.2加工仿真21 5.3程序清单30 结束语36 致谢37 参考文献38