碳钢高速车削中基于量热法的切削热分配

介绍了基于量热法的碳钢高速车削切削热在切屑、工件、刀具及环境中的量化分配.采用水作为收集切削热的媒介,通过自行设计的适配于高速车床的集屑容器以及分别收集工件和刀具热量的容器,在封闭式高速车削条件下测得各容器中水和承载物的温度变化,从而计算出传入切屑、工件、刀具及环境中的热量和总热量以及热流量.通过测量切削力和设定切削速度,得到主切削力的功率.将算出的总热流量与主切削力的功率相比较,评判用量热法测量切削热时的精确程度.

Cutting Heat Dissipation in High-Speed Machining of Carbon Steel Based on Calorimetric Method

The cutting heat dissipation in the chips,the workpiece,the tool and the surroundings during the high-speed machining of carbon steel was quantitatively investigated based on the calorimetric method.In the investigation,water was utilized as the medium to absorb the cutting heat,a self-designed container suitable for the high-speed lathe was used to collect the chips,and two other containers were respectively adopted to absorb the cutting heat dissipated in the workpiece and the tool.The temperature variations of the water,the chips,the workpiece,the tool and the surroundings during the closed high-speed machining were then measured.Thus,the cutting heat dissipated in each component of the cutting system,the total cutting heat as well as heat flux were calculated.Moreover,the power resulting from the main cutting force was obtained according to the measured cutting force and the predetermined cutting speed.The accuracy of cutting heat measurement by the calorimetric method was finally eva-(luated) by comparing the total cutting heat flux with the power resulting from the main cutting force.