局部几何特征急变类零件分区变参工艺制定方法

发布时间：2018-03-06 07:17

本文选题：局部几何特征　切入点：曲面分区　出处：《机械工程学报》2015年11期 　论文类型：期刊论文

【摘要】：高端装备中许多关键零件存在局部几何急变特征,由于多采用难加工材料、特殊结构,加工难度大,或者虽能加工但效率极低,无法满足高端装备快速发展的需求。随着数控加工技术的发展,局部几何特征急变类零件的高效数控加工技术成为目前工业生产领域研究的热点与难点。鉴于局部几何急变特征的存在,局部几何特征急变类零件采用统一工艺参数进行整体加工的加工工艺对该类零件适用度降低,制约了此类零件加工效率的提升。针对局部几何特征急变类零件,研究复杂曲面CAD模型基于局部几何急变特征的快速分割方法及功能结构件基于机床动态特性的加工误差模型,由此提出了局部几何特征急变类零件分区变参工艺制定方法,最终根据加工区连续特征生成序列化加工程序,可在数控加工设备上实现局部几何特征急变类零件高质高效加工。研究成果为局部几何特征急变类零件加工工艺制定提供了一种新方法。
[Abstract]:Many key parts of high-end equipment have local geometric abrupt change characteristics. Because of the difficult materials, special structure, processing difficulty, or low efficiency, many of the key parts of high-end equipment are difficult to process. Unable to meet the rapid development of high-end equipment. With the development of NC processing technology, The high efficiency NC machining technology of local geometric feature parts has become a hot and difficult point in the field of industrial production. In view of the existence of local geometric abrupt change features, The application of uniform process parameters to the whole machining of parts with local geometric features is reduced, which restricts the improvement of the machining efficiency of this kind of parts. In this paper, the fast segmentation method of CAD model of complex surface based on local geometric abrupt change feature and the machining error model of functional components based on dynamic characteristics of machine tool are studied. Finally, the serialization process program is generated according to the continuous characteristics of the processing zone. The high quality and high efficiency machining of parts with local geometric features can be realized on the NC machining equipment. The research results provide a new method for making the machining technology of the parts with local geometric features.
【作者单位】：大连理工大学精密与特种加工教育部重点实验室;
【基金】：国家自然科学基金青年科学基金(51205041) 高性能复杂制造国家重点实验室开放课题(Kfkt2013-06) 辽宁省教育厅重点实验室基础研究(LZ2014003) 中央高校基本科研业务费专项资金(DUT14QY25,DUT14RC(4)16)资助项目
【分类号】：TG659

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