Subject:
Coil Processing: Straightening and Leveling (Apr 25, 2024)
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Coil Processing: Straightening and LevelingSteel production and processing involve continuous operations, with the final step being coiling. When coiling, tension is applied to avoid producing “soft” or collapsing coils. However, coiling induces tensile and compressive stresses into the strip, which can lead to blank or part distortion in subsequent processes.Get more news about coil leveling,you can vist our website!To address this, the first operation when unwinding a coil is shape correction to ensure flatness before further processing. There are two main types of equipment used for this purpose: straighteners and precision levelers. Both bend the coil back and forth over a series of work rolls to alternately stretch and compress the upper and lower surfaces. Critical equipment parameters include roll diameter, spacing, material type, gear design, overall system rigidity, and power requirements.Straighteners and levelers progressively flex the strip to remove residual stresses. Each successive roll pair has an adjustable gap to deform the sheet to a targeted amount, resulting in a flat coil once the steel passes through all the rolls. However, equipment sufficient for shape correction on conventional grades may not be suitable for advanced steel grades.Leveling at-risk coils with repeated cycles of bending and unbending can minimize stretcher strains or fluting. Process control is critical to avoid excessive work hardening, which increases strength and reduces ductility.
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