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Multi-roll tension leveler

At Jiade we have many models of multi-roll tension levelerWhy you need Jiade 15-roll, 19-roll, and 23-roll multi-roll levelers?1. Core Concept: Why More Rolls?The number of rolls determines the density of bending cycles.· More Rolls = Smaller Pitch (distance between rolls).· Smaller Pitch = Smaller Bending Radius.· Result: For ultra-thin or ultra-high-strength steel (UHSS), a smaller bending radius is required to generate enough plastic deformation to eliminate internal stresses without breaking the strip.2. Comparison TableConfigurationTypical Strip ThicknessTarget MaterialKey Characteristics...

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Detailed Description

At Jiade we have many models of multi-roll Tension Leveler

23 roll multi-roll tension leveler machine

Why you need Jiade 15-roll, 19-roll, and 23-roll multi-roll Levelers?

1. Core Concept: Why More Rolls?

The number of rolls determines the density of bending cycles.

· More Rolls = Smaller Pitch (distance between rolls).
· Smaller Pitch = Smaller Bending Radius.
· Result: For ultra-thin or ultra-high-strength steel (UHSS), a smaller bending radius is required to generate enough plastic deformation to eliminate internal stresses without breaking the strip.

tension leveler roll pitch bending principle diagram

2. Comparison Table

Configuration	Typical Strip Thickness	Target Material	Key Characteristics
15-Roll Leveler	Thicker Gauges (e.g., 1.0mm – 6.0mm+)	Structural Steel, General Carbon Steel	Cost-Effective. Provides sufficient correction for standard flatness. Less effective for severe shape defects or thin stock.
19-Roll Leveler	Medium-Thin Gauges (e.g., 0.4mm – 2.0mm)	Automotive Exposed Panels, Appliance Steel, High-Strength Steel (AHSS)	The Industry Standard. The best balance between precision and cost. Effectively handles complex shapes like edge wave and center buckle.
23-Roll Leveler	Ultra-Thin Gauges (e.g., < 0.3mm)	Precision Electronics, Optical Substrates, Stainless Steel Foil	Maximum Precision. Designed for materials with extreme springback. Provides dense support to prevent strip wrinkling or tearing.

3. Detailed Analysis

15-Roll Leveler

· Function: This is a robust workhorse configuration. It uses larger diameter rolls with a wider pitch.
· Pros: Lower power consumption, easier maintenance, and lower initial investment.
· Cons: Cannot handle very thin or hard materials effectively; the large bending radius may not be enough to penetrate the neutral layer of high-strength steel.
· Application: Rough leveling, structural beams, or entry sections of pickling lines.

19-Roll Leveler

· Function: The most versatile configuration in modern steel plants. The increased roll density allows for finer control over the strip's longitudinal profile.
· Pros: Excellent flatness accuracy (often meeting automotive standards). Can process a wide range of strengths (up to 1200-1500 MPa).
· Cons: Higher maintenance than 15-roll due to more components.
· Application: Automotive Outer Panels, Home Appliances (Refrigerators/Washing Machines), and General Galvanizing Lines.

23-Roll Leveler

· Function: A specialized precision tool. It uses small diameter rolls with a very tight pitch.
· Pros: Superior ability to eliminate micro-waves and residual stress in materials that are prone to snaking (side camber). Prevents "orange peel" surface defects.
· Cons: Very sensitive to setup errors. Requires high-precision bearings and cooling systems. Higher drive power required.
· Application: Electronic Components, Precision Stamping, Silicon Steel, and Thin-Gauge Stainless Steel.

4. Selection Guide

Selection Factor	Recommendation
Material Thickness	Follow the rule: Thinner = More Rolls. Thin strips require dense support to avoid collapsing between rolls.
Material Yield Strength	For UHSS (>1000 MPa), add approximately 4–6 more rolls compared to mild steel of the same thickness to overcome springback.
Surface Quality	If the product is "Exposed Quality" (visible on cars), prefer 19-roll or 23-roll to ensure no residual roller marks.
Cost Efficiency	Do not over-specify. If a 15-roll meets your flatness tolerance (e.g., < 5 I-Unit), do not buy a 23-roll machine, as it will increase operating costs by 20%.