ENERGY SAVING METHOD USING MAIN SHAFT DECELERATION IN NO-LOAD PROCESS BETWEEN ADJACENT CUTTING ACTIVITIES OF NUMERICAL CONTROL MACHINE TOOL

To improve an energy utilization rate of a machine tool and avoid a loss imparted to a main drive system and a motor due to a frequent operation starting and stop of the machine tool.SOLUTION: An energy saving method comprises the steps of: collecting a rotation speed of a main shaft and a no-load time interval between adjacent cutting activities; acquiring energy consumption at each motion state of a numerical control machine tool; acquiring energy consumption during a no-load movement process of the machine tool and energy consumption during implementation of main shaft deceleration means based on the rotation speed in the main shaft state and the energy consumption of the machine tool in each motion state; and presetting an energy saving precondition, for obtaining a critical time for energy saving caused by the main shaft deceleration in the case that the energy consumption during the no-load movement process of the machine tool, the energy consumption during the implementation of the main shaft deceleration means, and the no-load time interval satisfy the energy saving precondition, and performing main shaft deceleration at the no-load time interval when the no-load time interval is greater than the critical time for the energy saving by the main shaft deceleration.SELECTED DRAWING: Figure 1 【課題】工作機械のエネルギー利用率を向上させ、工作機械の頻繁な起動停止による主駆動システム及びモータに与える損失を回避する。【解決手段】隣接する切削活動間の主軸回転数及び無負荷間隔時間を収集するステップと、数値制御工作機械の各運動状態におけるエネルギー消費を取得するステップと、主軸状態回転数及び工作機械の各運動状態におけるエネルギー消費に基づいて、工作機械の無負荷運動過程におけるエネルギー消費及び主軸減速手段の実施時におけるエネルギー消費を取得するステップと、省エネルギー前提条件を予め設定し、工作機械の無負荷運動過程におけるエネルギー消費、主軸減速手段の実施時におけるエネルギー消費及び無負荷間隔時間が省エネルギー前提条件を満たすと、主軸減速による省エネルギーの臨界時間を求め、無負荷間隔時間が主軸減速による省エネルギーの臨界時間よりも大きい場合、無負荷間隔で主軸減速を行うステップと、を含む。【選択図】図１