机器人力控精密抛光技术研究进展

A Review of Robotic Force-controlled Precision Polishing Technology

  • 摘要: 工业机器人固有的机械结构特点导致其在运动过程中存在较大的定位误差和刚度各向异性问题,一定程度上限制了其在模具、航空结构件等高表面完整性抛光中的应用。力控精密抛光技术是应对上述挑战、实现机器人在精密抛光领域应用拓展的必然选择。为此,本文介绍了机器人力控抛光技术的主要实现途径,并从力控系统结构和控制策略层面阐明了制约力控抛光性能提升的关键因素。进而,以表面波纹度和表面粗糙度为纽带,分析了抛光路径、机器人加工姿态、定位精度和工艺参数等因素与抛光表面质量间的内在关联性,系统评述了机器人力控精密抛光的研究进展,并针对机器人力控抛光技术存在的问题和未来发展方向进行了深入探讨。

     

    Abstract: The inherent mechanical structure of industrial robots leads to significant positioning errors and stiffness anisotropy during motion, limiting their application in the polishing scenarios with stringent requirements for high surface integrity, such as in molds, aerospace structural components, etc. Force-controlled precision polishing technology is a necessary choice to address these challenges and expand the application of robots to precision polishing process. For this purpose, this paper introduces the main methods to implement robotic force-controlled polishing technology, and expounds the key issues restricting the performance improvement of force-controlled polishing from the perspectives of force control system structure and control strategy. Furthermore, the intrinsic relationships between the polished surface quality and some factors are explored based on surface waviness and surface roughness, such as polishing path, robot processing pose, positioning accuracy, and process parameter. The research progress of robotic force-controlled precision polishing is systematically reviewed, and some existing problems and future development directions of force-controlled polishing technology are discussed.

     

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