Development of on-line measurement system of surface roughness for cold-rolled steel sheet

Author

Oh, M.J. ; Lim, C.S. ; Kim, Dalwoo

Author_Institution

Instrum. Res. Team, Res. Inst. of Ind. Sci. & Technol., Pohang, South Korea

Volume

1

fYear

1996

fDate

1996

Firstpage

335

Abstract

The optical measurement of surface roughness for cold-rolled steel sheet has been studied experimentally. Two parameters of the surface roughness, such as root-mean-square (rms) roughness and auto-correlation length are measured by optical method and converted into average surface roughness (Ra) and the number of peaks per inch (PPI), respectively. The rms roughness shows the linear relationship with Ra UP to certain limit that depends on the wavelength of a laser. We have developed an automatic surface roughness measurement system and installed at cold-rolled mill, and tested in-situ. The system is verified to be able to measure Ra in the range of 0.1-2.0 μm and PPI of 100-600 per inch

Keywords

cold rolling; computerised instrumentation; light scattering; measurement by laser beam; online operation; spatial variables measurement; steel industry; surface topography measurement; 0.1 to 2 mum; Ra; auto-correlation length; automatic surface roughness measurement; average surface roughness; cold-rolled mill; cold-rolled steel sheet; linear relationship; on-line measurement; optical measurement; rms roughness; root-mean-square roughness; surface roughness; Autocorrelation; Automatic testing; Length measurement; Milling machines; Optical surface waves; Rough surfaces; Steel; Surface roughness; System testing; Wavelength measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1996. IMTC-96. Conference Proceedings. Quality Measurements: The Indispensable Bridge between Theory and Reality., IEEE

Conference_Location

Brussels

Print_ISBN

0-7803-3312-8

Type

conf

DOI

10.1109/IMTC.1996.507402

Filename

507402