A novel sensor for lubrication and contact measurement in metal rolling
A novel sensor for lubrication and contact measurement in metal rolling
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一种用于金属轧制润滑和接触测量的新型传感器
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
A. Hunter
中科院分区：
文献类型：
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作者：
R. Dwyer;A. Hunter
超声波传感器安装在带钢冷轧机的上辊内。使用纵向和剪切偏振超声波换能器。传感器发射和接收从卷带上、下界面反射的超声波脉冲。通过连续记录脉冲反射，可以现场确定不同轧制伸长率的轧辊咬入宽度；以这种方式测量了 8 至 13 毫米的宽度和 7 至 28% 的伸长率。轧辊-带材界面处于由液体和固体接触组成的混合状态润滑。纵向超声波可以通过固体和液体接触来传播，而剪切超声波只能通过凹凸接触来传播。两种反射机制的模型用于单独提取液体部分的刚度贡献，从而确定油膜厚度。虽然目前该方法是近似的，并且受到空间分辨率的限制，但记录的薄膜厚度在 0.2 至 0.5 μm 范围内。
Ultrasonic sensors have been installed within the upper roll of a steel strip cold rolling mill. Both longitudinal and shear polarised ultrasonic transduces were used. The sensors emit and receive ultrasonic pulses reflected from the roll strip upper and lower interfaces. By continuously recording the pulse reflection it was possible to determine in-situ the roll bite width for various rolling elongations; in this way widths of 8 to 13mm for elongations of 7 to 28% were measured. The roll-strip interface is in mixed regime lubrication consisting of both liquid and solid contact. Longitudinal ultrasound can be transmitted by both solid and liquid contact, whereas shear ultrasound can only be transmitted by asperity contact. A model of the two reflection mechanisms was used to extract the stiffness contribution from the liquid part alone and hence determine the oil film thickness. Whilst at present the method is approximate, and suffers from spatial resolution limitations, film thicknesses in the region 0.2 to 0.5 μm were recorded.