Development of Dimension and Shape Measurement of Hot Steel Sections

There has been a demand for the development of a device to quickly measure the dimensions of products on hot rolling production lines in large shape mills. A hot rolling dimension measurement device incorporating six laser displacement meters which has been introduced at the Kashima Steel Works of Sumitomo Metal Industries enables noncontact, high-speed, high-precision measurements of hot-rolled products to be taken, thus solving the problems associated with the reduction in efficienc caused by the need to measure the dimensions of products by taking a sample and making manual measurements. This paper reports on the development, measurement principles, equipment summary and measurement results for this device.