Research on New Shapemeter of Cold Rolling Thin Strip

Based on the shape detecting principle and the digital signal technology, a new shape meter was developed thorough theoretical analysis and industrial adjustment to develop the shape detecting roll, the shape signal processing method, the original signal compensation mechanism and so on. The shape meter has good performance and stability, which can effectively avoid the scratch of steel strip surface, accurately detect real online strip shape and provide accurate online shape datum for shape control system. It was applied in 1250 mm cold rolling mill, the actual industrial tests prove that the shape signal was stable and reliable, met the harsh condition and the online technical requirements, and could improve shape quality significantly.

New Industrial Shape Detecting Equipment of Cold Strip

Shape has a significant impact on the good quality of follow-up deep-processed steel products. But it is difficult to detect, so a shape detecting equipment of cold rolling strip is developed to meet industrial application, which mainly consist of the shape detecting roller, the collecting ring, the DSP shape signal processing board and the shape control model. The shape detecting system was successfully used in 1250 mm HC 6-high reversible cold rolling mill. The precision of shape detecting is 0.2 I.

Wrapping Angle Compensation Model of Cold Rolling Strip Shape Signal

When wrapping angle of cold strip covering surface of shape detecting roll dynamically changes, online radial pressure of the shape detecting roll is changed too, and it seriously affects online shape detecting precision of cold strip. The cold strip online dynamic wrapping angle compensation model is established, and successfully applied in 1250 mm 6-high cold mill, remarkable results is achieved. The error between calculated values and measured values of total tensions is within 3%.

Research on the Entire Roll Type Shape Meter of Cold Rolling Strip and its Industrial Application

In order to increase shape measuring precision of cold strip, based on the shape detecting principle and the digital signal technology, a new entire roll type shape meter is developed thorough theoretical analysis and industrial adjustment to develop the shape detecting roll, the shape signal processing method, the original signal compensation mechanism and so on. The shape meter has good performance and stability, which can effectively avoid the scratch of steel strip surface, accurately detect real online strip shape and provide accurate online shape datum for shape control system. It was applied in 1250 mm cold rolling mill, the actual industrial tests prove that the shape signal was stable and reliable, met the harsh condition and the online technical requirements, and could improve shape quality significantly. And the shape close loop control of the 0.18 mm thin cold strip was successful realized.

Study on Design Parameters of Whole-Roll Shape Detecting Roll

For the shape defects detection problem of the cold-rolled strip, the design parameters of whole-roll shape detecting roll were studied. The pre-pressure models were derived with the theory of elasticity and shell mechanics, and the pressure transmission performance of shape detecting roll was calculated. The correctness of the theoretical formula was verified by experiment. The design parameters presented by this paper would help to further improve the design standards and performance of the whole-roll shape detecting roll.

Research on Shape Detecting System of Cold Rolling Strip

Comprehensive considered actual working conditions of cold rolling mill, a high precision shape detecting system of cold rolling strip was developed to meet industrial application. Consideration to both follow-up processing technology requirements, dynamic flatness standard curves could be formulated according to different rolling conditions and product specifications, and reliable shape datum were provided for close-loop shape control. This system was successfully used in Angang 1250 mm HC 6-high reversible cold rolling mill. Then the shape index and the quality stability of cold rolling strip were increased significantly, the errors between the calculated values and measured values of the total tension were less than 3%, the precision of shape detecting is 0.2 I and shape indices was within 6 I after the close-loop shape control was input.

Shape Detecting and Shape Control of Cold Rolling Strip

Based on the shape detecting principle and the DSP (Digital Signal Processing) technology, a high-precision shape detecting system of cold rolling strip is developed to meet industrial application. It was successfully used in Angang 1250 mm HC 6-high reversible cold rolling mill. The precision of shape detecting was 0.2 I, the shape deviation was controlled within 6 I after the close loop shape control was input.