Abstract: To reduce energy consumption of the workshop machining and improve energy efficiency of the manufacturing,a machine tool power model which included standby state,auxiliary status,air-cutting state and cutting state was established.For cutting power of milling machine,an improved model was put forward by considering the influence of material hardness and spindle rotate speed on the material removal power in milling process.The proposed cutting power model could be used to assess energy consumption of situation when milled a variety of work-piece materials,and it could extend the application scope of the existing milling power model to some degree.Aiming at the problem of intermittent changes of standby power leaded by working characteristics of lubricating and cooling system of machine tool,a kind of piecewise function type of standby power expression model was proposed which was more accurately reflect the situation of standby power by comparing with the existing constant standby power model.The experimental research and examples showed that the proposed method had good prediction accuracy in evaluating energy consumption of machine tools during plane milling process.

Key words: machine tools, power model, energy consumption evaluation, material hardness

摘要： 为了降低车间加工能耗、提高制造过程能量效率,建立了铣床待机状态、辅助状态、空载状态、切削状态下的功率模型。针对铣床切削功率,提出一种考虑材料硬度和主轴转速对材料去除功率影响的切削功率改进模型,对同一机床铣削多种工件材料情况的能耗进行评估,从而在一定程度上扩展现有铣削功率模型的适用范围。针对被测试机床润滑冷却系统工作特性导致待机功率存在间歇变化,提出一种分段函数式待机功率表达模型,相比现有常数式待机功率模型,该模型能够更好地反映机床待机功率情况;经实验研究和实例验证,所提改进功率建模方法及其模型具有良好的平面铣削加工能耗预测准确性。

关键词: 数控机床, 功率模型, 能耗评估, 材料硬度