Online roughness and waviness measurement in HDG lines with EMG SORM®

The Technical Edge: Non-Contact Measurement at Production Speed

Traditional surface roughness measurements rely on mechanical stylus instruments, which require the production line to halt or necessitate offline sample testing. These methods are not only time-consuming but also lack the statistical significance needed for modern manufacturing standards. EMG SORM® revolutionizes this process by providing a non-contact, online measuring system capable of functioning at production speeds up to 350 m/min. 

The system utilizes a confocal chromatic measurement principle, where different wavelengths of light focus at different distances, allowing for precise measurement of the strip’s micro profile. This data is used to calculate key roughness parameters such as Ra (arithmetic average roughness), RPc (peak count), and Wsa (waviness). By integrating this solution into a production line with a traversing unit, EMG SORM® provides continuous roughness and waviness monitoring across the entire width and length of the strip, ensuring comprehensive surface quality assessment.

Application in Hot Dip Galvanizing and Continuous Annealing Lines

In hot dip galvanizing lines, where the metal strip is coated with zinc or alloys, the control of surface roughness is vital for both the adhesion of the lacquer coating and the optical appearance of the final product. The same is true for in continuous annealing lines. EMG SORM® excels in these environments by offering online data that enables operators to detect and correct deviations immediately.

The system’s ability to perform online visualization and recording of roughness and waviness parameters allows for immediate corrective actions, optimizing the rolling and skin-pass processes. This capability not only enhances product quality but also reduces costs by extending the service life of work rolls and minimizing rejects during subsequent quality assessment procedures.

Maximizing Production Efficiency and Quality

The implementation of EMG SORM® offers numerous advantages that lead to a short return on investment (ROI). Its capability of immediate detection of roughness and waviness deviations ensure that potential issues are addressed before they impact the final product, leading to a significant reduction in customer complaints. Moreover, EMG SORM® can contribute to a more efficient and cost-effective production process by optimizing the skin pass mill control and thus ensuring a homogeneous surface quality.

For those interested in improving their production line’s surface quality control, EMG SORM® represents a significant technological advancement. The system’s flexibility in installation, minimal space requirements, and ease of integration make it an ideal choice for modern manufacturing lines for flat metals products.

To learn more about how EMG SORM® can enhance your production processes, we invite you to watch our short but comprehensive video at YouTube: https://www.youtube.com/watch?v=Dsy6e3lIAJo 

Have we aroused your interest?

Find out more about the advanced technology and the wide range of applications of EMG SORM® at EMG in the Metals business unit. Visit our website and learn more about the advantages and specifications of this innovative measuring system. Our sales and service as well as our product management are ready to support you in improving your manufacturing processes and achieving excellent product quality.

Download: Brochure EMG SORM®