Tank Plate Rolling Shape Control Technology

Core Control Objectives
The rolling process needs to ensure a shape crown ≤0.1% and flatness ≤5 I-Units (ASTM standard), focusing on solving edge wave, center buckle, and other defects. When using a CVC mill, the roll gap adjustment accuracy needs to reach ±0.01mm.

Intelligent Control System
Based on a laser thickness gauge (sampling frequency 1kHz) and a multivariable PID algorithm, the rolling force is dynamically adjusted (fluctuation <2%). The latest application of digital twin technology achieves a shape prediction accuracy ≥92%.

Process Optimization Directions
It is recommended to use asynchronous rolling (speed ratio 1.05-1.2) in conjunction with segmented cooling, which can reduce residual stress by 30%. The viscosity of the rolling lubricant needs to be controlled at 40-60cSt (80℃).

Quality Inspection Standards
Online inspection needs to meet GB/T 3075-2025 requirements. Offline sampling is performed for a three-point bending test (deflection <2mm/m), and metallographic analysis of grain size (≥7 grade) is performed.