Balancing lateral force is essential to reduce bit vibrations and prolong bit service life. During the process of cutting, the instantaneous cutting situation is governed by the previous blades cutting. This paper introduces a notion called "zoning method" based on the cutting geometry of bit-rock interface, which is dedicated to distinguishing different phases of cutting. Furthermore, a full-phase optimization model is developed to optimize cutter layout for minimizing the lateral force in each cutting phase, the NSGA-II is used to solve for the Pareto-optimal solutions, and the fuzzy comprehensive evaluation method is used to select the optimal solution. Finally, a case study of full-phase optimization of PDC bit cutter layout is conducted to highlight the advantage of the zoning method. The case study results show that the lateral force is reduced significantly in each cutting phase by using zoning method, which can help to achieve the real lateral force balance of PDC bit.

平衡侧向力对于减少钻头振动和延长钻头使用寿命至关重要。在切割过程中，瞬时切割情况取决于先前的刀片切割。本文介绍了一种基于钻头-岩石界面切削几何形状的“分区方法”概念，该概念专门用于区分切削的不同阶段。此外，开发了一个全阶段优化模型来优化刀具布局，以使每个切割阶段的侧向力最小，NSGA-II用于求解帕累托最优解，而模糊综合评估方法用于选择最优解。最佳解决方案。最后，进行了一个全阶段优化PDC钻头刀具布局的案例研究，以突出分区方法的优势。