机械5

WHXC1702零件数控加工程序编制 摘要 WXHC1702零件是一个孔系箱体零件。箱体类零件的加工,不但包括多个加工部位，而且还涉及许多种加工工艺，例如镗、铣、钻、铰以及攻丝等加工方法，并且对加工的精度要求也比较高，但是数控加工中心是可以通过自动换刀装置从而实现一次装夹就完成多道工序。因此，采用数控加工中心加工箱体类零件较适合。 数控加工是一种运用数字化信息对机械运动及加工过程进行控制的加工方法，由预先编制好的代码程序控制刀具运动。具体编程过程可以总结为：以分析零件图为基础，制定零件的加工工艺，绘制刀具布置图以及选取每把刀的切削参数，并在计算机上利用 UG数控编程软件完成零件的三维造型、刀具的选择和加工方式、填写切削参数、生成刀具轨迹、完成轨迹仿真，并通过后处理生成要求的最终NC代码。在此基础上，利用手工编程添加指令实现由三轴控制到四轴控制的操作。最后通过检查得到较为合理的箱体类零件加工的数控程序。以此实现对WHXC1702箱体零件的数控加工。 关键词：箱体类零件；数控加工；数控编程 ABSTRACT WXHC1702 parts are part of a box-type box parts, box parts of the processi
ng,
not o
nly i
ncludes a
number of processi
ng sites, but also i
nvolves a variety of processi
ng tech
nology, such as bori
ng, milli
ng, drilli
ng, hi
nge a
nd tappi
ng a
nd other processi
ng methods, The acacc- -uracy requireme
nts are relatively high, but the CNC machi
ni
ng ce
nter is through the automic tool cha
nger to achieve a clampi
ng to complete the multi-cha
n
nel process. Therefore, the use of CNC machi
ni
ng ce
nter processi
ng box parts are more suitable. CNC machi
ni
ng is a ki
nd of digital i
nformatio
n o
n the mecha
nical moveme
nt a
nd processi
ng of the co
ntrol process, by the preparatio
n of a good code program co
ntrol tool moveme
nt. The specific programmi
ng process ca
n be summarized as follows: to a
nalyze the parts of the map as the basis for the developme
nt of parts processi
ng tech
nology, drawi
ng tool layout a
nd select the cutti
ng parameters of each k
nife, a
nd the use of computer UG CNC programmi
ng software to complete the three-dime
nsio
nal modeli
ng of parts, A
nd processi
ng methods, fill i
n the cutti
ng parameters, ge
nerate tool path, complete the trajectory simulatio
n, a
nd through the post-processi
ng to ge
nerate the required fi
nal NC code. O
n this basis, the use of ma
nual programmi
ng to add i
nstructio
ns to achieve from the three-axis co
ntrol to the four-axis co
ntrol operatio
n. A
nd fi
nally through the i
nspectio
n to get a more reaso
nable box parts processi
ng NC program. Key words: prismatic part;
numerical co
ntrol machi
ni
ng;
numerical co
ntrol programmi
n 目录 摘要I ABSTRACT II 1绪论1 1.1数控编程技术概念1 1.2数控编程发展历程1 1.3数控编程技术现状和趋势1 1.4本文研究的目的及意义2 1.5本文的内容安排2 2分析零件和制定工序3 2.1分析零件和三维造型3 2.1.1分析零件图3 2.1.2三维造型过程3 2.2制定整个工序5 2.2.1数控加工工序的划分原则与内容5 2.2.2制定工序6 2.2.3切削参数的确定和刀具的选择9 3编制加工程序11 3.1建立数控加工的坐标系（工件坐标系） 11 3.1.1工件坐标系建立的原则11 3.1.2建立箱体零件的坐标系11 3.2典型加工部位的编程过程的详细叙述14 3.2.1T03粗精铣前面的整个编程过程14 3.2.2T14钻前视图孔的整个编程过程21 3.2.3T7镗前视图孔的整个编程过程27 3.3最终的数控加工程序30 4结论31 参考文献32 致谢33 附录1：外文翻译34 附录2：外文原文45