Methods for calculating the roll fill ratio in profile rolling and methods for manufacturing profiles.

Abstract

A method for calculating the roll fill degree of profile rolling and a method for manufacturing profile steel are provided, which can accurately calculate the roll fill degree of steel in profile rolling. The method for calculating the pass filling degree of profile steel rolling includes: a measurement length calculation process (step S1), which calculates the length of the rough steel sheet (S2) after the final pass rolling, which is the measurement length (L); a material cross-sectional area calculation process (step S2), which calculates the material cross-sectional area (A) in the final pass rolling by subtracting the cutting length (CL) from the measurement length (L) based on the volume of the rough steel sheet (S2) after the final pass rolling, excluding the cutting portion (C); and a pass filling degree calculation process (step S3), which calculates the pass filling degree (μ) of the steel (S1) in the final pass rolling based on the material cross-sectional area (A) and the cross-sectional area (Kk) of the pass in the final pass rolling, which also includes the portion that becomes the roller gap.

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