刀具工件双旋转运动机床加工过程的能量效率获取方法

对于刀具工件双旋转运动机床，由于切削力测量仪器难以安装，同时，切削力理论模型和经验公式难以反映加工过程切削力的瞬态变化，这使得刀具工件双旋转运动机床的能量效率至今难于获取。为此，提出一种运用载荷损耗系数计算获取刀具工件双旋转运动机床能量效率的方法，该方法首先建立了刀具工件双旋转运动机床的能量效率模型，然后基于刀具、工件系统的能耗组件参数分别建立了刀具轴和工件轴的载荷损耗系数计算模型，并由此推导出刀具工件双旋转运动机床的载荷损耗能量、有效能量及能量效率的计算分析模型。实际应用时，该方法只需要安装功率传感器测取加工过程中的输入功率和空载功率，便可计算获取能量效率。实验验证表明，该方法具有较好的能量效率获取精度。应用案例表明，所提方法应用方便，可为刀具工件双旋转运动机床的能效预测、监控与管理提供技术支撑，具有较好的应用前景。

Energy Efficiency Acquisition Method for Machine Tools with Both Tool and Workpiece Axis Rotating during Machining Process

It is difficult to install the cutting-force measuring instruments on machine tools with both tool and workpiece axis rotating， thus the theoretical cutting force model and the empirical formulae failed to reflect the transient changes of cutting forces during the machining processes.As a result， it is still a challenge to acquire the energy efficiency of machine tools with both tool and workpiece axis rotating.Therefore， the energy efficiency models for machine tools with both tool and workpiece axis rotating were established， and the load loss coefficient models for tool and workpiece axis were developed based on their basic data respectively.Based on these model， the methods for calculating the load loss energy， efficient energy and energy efficiency for this kind of machine tools were presented.In practical applications， the proposed method may calculate the energy efficiency only need to monitor input powers and idle powers by using power sensors.Experimental verifications show that this method may obtain the energy efficiency precisely.Application cases show that the method may be effectively employed to obtain the energy efficiency for machine tools with both tool and workpiece axis rotating， without any usage of cutting-force measuring instruments.The proposed method， which may provide some technical supports for machine tool energy efficiency prediction， monitoring and management， has a wide application prospects.