【摘要】 绿色制造和精密制造技术是航空领域的发展趋势。面对承载性能的复杂曲面加工特征，广泛应用精铸/精锻等近净成形工艺以减小毛坯余量。虽然能减少材料去除量也能提升加工效率，但小余量毛坯可能因为局部缺少材料造成加工不合格。为解决该问题，提出了复杂曲面轮廓度公差约束下的多层次余量优化方法，改变加工模型仅做刚性位移的传统认识，允许设计截面线各自在轮廓度公差带改变相对位置或者变形，从而增大寻优的可行域空间，提高寻找目标加工曲面的能力。进一步，因为余量优化造成公差带空间被占用，提出了自适应调整切削路径的方法以保证满足设计公差要求。最后，通过典型复杂曲面特征叶身加工验证了所提余量优化和切削路径调整方法的有效性。更多还原

【Abstract】 With the development of green manufacturing and precision manufacturing, in the face of the complex curved surface characteristics of aviation, near-net-shape forming processes such as precision casting and precision forging are widely used to obtain small allowance blanks. However, due to the lack of materials in some local areas, the processing may be substandard. To address this issue, a multi-level allowance optimization method under contour tolerance constraints is proposed. It changes the concept of rigid displacement of the workpiece and allows the design section lines to change their relative positions or deforms within the contour tolerance zone respectively, thereby increasing the feasible domain space for optimization and enhancing the capability to find the target machined surface. Furthermore, after the optimization of the allowance, the tolerance zone space was occupied, and a method for adaptively adjusting the cutting path was proposed. Finally, the effectiveness of the proposed allowance optimization and cutting path adjustment methods was verified through the machining of typical complex surface featured blade bodies.更多还原