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自由曲面主要是通过数控加工实现,数控加工刀具轨迹规划对自由曲面加工的效率和质量有重要的影响。基于区域的刀具轨迹生成策略是通过识别自由曲面上有意义的特征,将具有相似的加工属性的局部曲面分割成相应的区域,这个过程称为区域分割,再以区域为单位自动生成数控加工刀具轨迹。该加工策略的关键技术是区域分割,针对面向数控加工的自由曲面区域分割技术的进行归纳综述,主要分三个部分:面向数控加工的自由曲面区域的概念和分类、区域分割算法、区域分割技术在自由曲面数控加工中的应用。对以上每个方面中涉及的概念和方法进行简短介绍,就学者们所提出的方法的主要优点和缺点进行讨论。在文章的最后,提出了目前该研究领域仍存在的问题,并对发展方向进行了展望。
Free-form surface is mainly realized by CNC machining. The NC tool path planning has an important influence on the efficiency and quality of free-form surface machining. Region-based tool path generation strategy is through the identification of meaningful features on the freeform surface, will have similar processing properties of the local surface is divided into the corresponding area, the process is called area segmentation, and then automatically generated in the region of CNC machining tools Trajectory. The key technology of this machining strategy is area division. It summarizes the technology of area division for freeform surface, which is mainly divided into three parts: the concept and classification of freeform surface area for numerical control machining, the algorithm of area division and the technology of area division Application in Freeform Surface NC Machining. Briefly introduce the concepts and methods involved in each of the above aspects and discuss the main strengths and weaknesses of the methods proposed by scholars. At the end of the article, I put forward some problems that still exist in the research field at present, and put forward the prospect of the development direction.