切削液是机械加工过程中产生的主要废物流之一。为了揭示切削液的作用，对切削液对工件温度历史的影响进行了实验和分析研究。在铝合金的整个钻孔操作过程中，连续测量了与刀具相关的不同位置的温度。建立了考虑环形热源的瞬态温度场模型，并进行了实验验证。观察到切削液对工件温度响应的显著影响。

CUTTING FLUID IS ONE OF THE MAJOR WASTE STREAMS PRODUCED IN MACHINING. TO REVEAL THE ROLE OF CUTTING FLUIDS, THE INFLUENCE OF CUTTING FLUID ON WORKPIECE TEMPERATURE HISTORY WAS STUDIED EXPERIMENTALLY AND ANALYTICALLY. TEMPERATURE MEASUREMENTS AT VARIOUS LOCATIONS, RELATIVE TO THE TOOL, WERE TAKEN CONTINUOUSLY THROUGHOUT A BORING OPERATION ON ALUMINUM ALLOYS. A MODEL OF THE TRANSIENT TEMPERATURE FIELD WAS DEVELOPED ASSUMING A RING HEAT SOURCE, WHICH WAS VERIFIED EXPERIMENTALLY. SIGNIFICANT EFFECTS OF CUTTING FLUID ON TEMPERATURE RESPONSE IN THE WORKPIECE WERE OBSERVED.