• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2015, Vol. 51 ›› Issue (11): 109-115.doi: 10.3901/JME.2015.11.109

• 数字化设计与制造 • 上一篇    下一篇

局部几何特征急变类零件分区变参工艺制定方法

马建伟, 贾振元, 王福吉, 王泠, 许强   

  1. 大连理工大学精密与特种加工教育部重点实验室
  • 出版日期:2015-06-15 发布日期:2015-06-15
  • 基金资助:
    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)和中央高校基本科研业务费专项资金(DUT14QY25,DUT14RC(4)16)资助项目

Sub-regional Process Method with Variable Parameters for Parts with Rapid Change of Local Geometric Feature

MA Jianwei, JIA Zhenyuan, WANG Fuji, WANG Ling, XU Qiang   

  1. Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology
  • Online:2015-06-15 Published:2015-06-15

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。

关键词: 变参数, 动态特性, 精密加工, 局部几何特征, 曲面分区

Abstract: Parts with rapid change of local geometric feature are usually critical parts in high-end equipments, which are difficult or inefficient to process on account of the adoption of difficult-to-machine material and special structure. In this way, it cannot satisfy the rapid development of high-end equipments. As the development of NC process technology, the high efficiency NC machining technology for the parts with rapid change of local geometric feature becomes a popular and difficulty issue in the industrial field. Employing the constant machining parameter to process the parts with rapid change of local geometric feature wholly is less applicative because of the existence of rapid change of local geometric feature, which restricts the machining efficiency improvement of such parts. Aiming at the parts with rapid change of local geometric feature, the quick partition method based on the rapid change of local geometric feature for the CAD model of complex surface and the mathematical modeling of machining error based on the dynamic characteristics of machine tool for the functional structure are studied. A sub-regional process method with variable parameters for the parts with rapid change of local geometric feature is proposed. The serialized processing program is generated based on the continuous characteristics of machining region, and the parts with rapid change of local geometric feature can be processed precisely and efficiently with NC equipment. The research achievement provides a new machining process for the parts with rapid change of local geometric feature.

Key words: dynamic characteristics, local geometric feature, precision machining, surface partition, variable parameter

中图分类号: