关键词: 倾斜轨迹, 板材成形, 数控渐进成形, 成形轨迹, 厚度均匀化, 数控系统

Abstract: Aiming at the uneven thickness of sheet part in CNC incremental forming,the method for thickness homogenization based on tilted forming path was proposed.By adopting the tilted forming path that formed a certain angle with horizontal plane,the sheet posture was adjusted in the process of CNC forming so that the surface forming angles was adjusted and the differences of surface forming angles was reduced,which could prevent the sheet to be fractured by the reason of excessive thinning and achieve the purpose of sheet thickness uniformity.The posture of tilted forming path was optimized through optimizing the posture of cutting plane with genetic algorithm,and the optimum tilted forming path that minimized the difference of the forming angles throughout the surface was generated.The digital simulation and experiment based on horizontal forming path and tilted forming path showed that the proposed method could make the thickness difference decrease and homogenize.

Key words: titled forming path, sheet forming, CNC incremental forming, forming path, thickness homogenization, numerical Control System