【摘要】 在切削加工中刀具和工件界面上产生的阻尼力对低速区切削稳定性有显著提升，开发了等效过程阻尼快速算法得到了有限振幅的多边界稳定性叶瓣图，其计算效率大幅提升，并且通过数值模拟验证了程序的正确性。同时建立了考虑接触损失效应的非线性过程阻尼模型，采用DDE-BIFTOOL工具箱开发了再生颤振分岔图，显示了刀具和工件在超过临界振幅值后发生脱离的现象，证实了所建立模型的有效性，弥补了等效线性过程阻尼模型无法预测刀具振离工件时系统的颤振后动力学行为。切削稳定性仿真结果可用于指导钛合金、高温镍基合金等难切削材料高效切削。更多还原

【Abstract】 The damping force generated at the interface between tool and workpiece in cutting machining has a significant enhancement on the cutting stability in the low-speed region.In this paper, the equivalent process damping fast algorithm is developed to obtain the multi-boundary stability lobe diagram with finite amplitude.The computational efficiency is greatly improved, and the correctness of the program is verified by numerical simulation.Meanwhile, a nonlinear process damping model considering the contact loss effect is established, and a regenerative chatter bifurcation diagram is developed using the DDE-BIFTOOL toolbox, which shows the detachment of the tool and the workpiece after exceeding the critical amplitude value, confirming the validity of the established model and compensating for the inability of the equivalent linear process damping model to predict the post-chatter dynamics behavior of the system when the tool vibrates away from the workpiece.The results of the cutting stability simulation can be used to guide the efficient cutting of difficult-to-cut materials such as titanium alloys and high-temperature nickel-based alloys.更多还原