A local tool path smoothening scheme for micromachining

Wenbin Zhong, Wenlong Chang, Luis Rubio, Xichun Luo

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Linear and circular representations are widely used to define tool paths, however, the tangency discontinuity between the linear and circular segments leads to large fluctuations in velocity and acceleration, as a result, the machining accuracy and efficiency are degraded. It becomes the key problem in some micromachining situations where the quality of freeform surfaces is critical, such as moulds and knee implants, etc. This research aims to develop a local tool path smoothening scheme to achieve C2 continuity at the transition positions. This scheme applies to sections consisting of high density of short segments. These segments will be approximated by cubic B-splines. The approximation is carried out within the specific error tolerance. High frequency energy to be injected into the servo loop control system is greatly reduced by the C2 continuity. The proposed scheme is feasible to be implemented in real-time microcontrollers due to the computational efficiency and reliability of B-spline algorithms.
Original languageEnglish
Number of pages2
Publication statusPublished - 30 May 2016
Event16th euspen International Conference - East Midland Conference Centre, Nottingham, United Kingdom
Duration: 30 May 20162 Jun 2016


Conference16th euspen International Conference
Country/TerritoryUnited Kingdom


  • tool path smoothening
  • B-spline
  • Micromachining


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