What aspects should be considered in the daily management of a tension‑bending straightening machine?
Author:
Editor
Release Date:
2026-09-14
Purpose
For metal strips such as cold‑rolled sheet, galvanized sheet, stainless steel, and aluminum, simultaneous application of tension, repeated bending, and straightening eliminates waviness, buckling, crookedness, and residual stresses, improves flatness, and produces straight‑strip steel. This process is commonly used in pickling, cold rolling, galvanizing, color coating, and finishing lines.
Structure (two bends, two straightening sections)
1. Inlet S-Roller Group: Provides inlet tension and clamps the steel strip.
2. Bending Unit (2 sets of bending rolls): The steel strip is repeatedly bent in both forward and reverse directions, inducing minute plastic elongation in the material and relieving internal stresses.
3. Straightening Unit (2 sets of straightening rolls): Performs fine straightening on strip steel after tensile‑bending, further eliminating flatness defects.
4. Exit S‑roller group: establishes exit tension; the tension difference between the entry and exit sides determines the strip’s elongation rate.
5. Frame, roll stand, hydraulic downforce, and tension control system
Working principle
Tension is generated by the front and rear S‑rollers, causing the strip to undergo tensile deformation and alternating bending between the leveling rolls. This induces plastic elongation on the surface, aligning fibers of varying lengths to equalize their length and eliminate flatness defects. The straightening effect is controlled by adjusting tension, roll penetration depth, and the degree of elongation.
Key Process Parameters
- Tension: Calculated based on strip yield strength, strip width, and thickness (tension‑mode control)
- Elongation: typically 0.1% to 2%; use the lower value for thin sheets and high-strength steels.
- Bending roller insertion depth: controls the amount of bending deformation.
- Linear speed: matched to the preceding and subsequent processes
Zhejiang Mingyuan Equipment Co., Ltd. is a specialized manufacturer of mechanical equipment, serving the metallurgical industry with cold‑rolling and finishing production lines. The company supplies auxiliary equipment and spare parts to the steel, non‑ferrous metals, and other metallurgical sectors, and provides services to relevant metallurgical research institutes. Its independently designed and developed product portfolio includes tension‑bending straightening units, longitudinal–transverse shearing units, disc‑shear units, dephosphorization straighteners, 23‑roller precision straightening units, roller‑surface cleaning technologies, as well as roller housings and roller‑system components.
Related Information
Tension-bending Straightening Machine | Complete 2026 Buyer’s Guide
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