机械图中的表面粗糙度计算机辅助标注方法

Method of Computer Aided Marking for Suface Roughness in Mechanical Draftings

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摘要　目的　提出一种表面粗糙度自动标注的方法,弥补了目前AutoCAD不能直接标注的不足.方法在AutoCAD平台上利用AutoLISP语言编程与属性块插入相结合的方法,实现了表面粗糙度代号自动标注.结果　给出了设计方法及步骤,提供了一个AutoLISP程序框图和一个标注实例.结论　实践证明,该方法简便、迅速,提高了标注效率,而且所注代号完全符合国标规定,对于解决零件图的形位公差的标注问题也有一定的参考价值. Aim\ To improve the shortage that suface roughness can not be directly marked by AutoCAD at present, a method of selfmarking for roughness is brought forward. Methods\ Roughness selfmarking is completed by the method of combinating AutoLISP Programme with insertion of attribute block on AutoCAD platform. Results\ The design method and procedure are given ;an AutoLISP Program graph and a practical example are provided.Conclusion\ It has been proved that this method is convenient and quick for roughness markings, and can increase the marking efficiency. Furthermore, the symbols marked with it are in accordance with the national standard. This method also has a certain reference value for the marking of geometric tolerance.

作者苗鸿宾

机构地区华北工学院机械工程系

出处《华北工学院学报》 2002年第6期405-408,共4页 Journal of North China Institute of Technology

关键词机械图标注计算机辅助设计表面粗糙度代号 AUTOLISP程序属性块 computer aided design suface roughness symbol AutoLISP program attribute block

分类号 TH126 [机械工程—机械设计及理论] TP391. [自动化与计算机技术—计算机应用技术]