Levelling Machine for Carbon Steel Strip in Galvanizing Lines
A levelling machine stretches the strip with tension and continuous bending to fix its shape. Inlet and outlet tension rolls stabilise tension, the roll group raises it, and two rows of bending components with balancing rollers complete the correction in two stages.
- Two tension rolls at inlet and outlet stabilise tension
- Roll group amplifies tension through the machine
- Two rows of bending components with balancing rollers
- Two stage correction, alternating deformation then full correction
Key Benefits
What the machine delivers for a coating line.
All Three Dimensional Defects Addressed
Bilateral wave, unilateral wave, middle wave, two rib wave, warping, buckling and latent poor shape are all eliminated in the same pass.
Internal Stress Made Uniform
The first stage distributes residual deformation evenly and the second stage corrects it fully, so internal stress tends to uniformity.
Better Mechanical Behaviour Downstream
Improving strip shape also improves mechanical properties for the forming operations that follow.
Where It Is Used
Where it is used.
- Galvanizing lines processing carbon steel strip
- Production of strip for car bodies, doors and roofs
- Iron and steel manufacturing finishing sections
- Coil preparation before forming operations
Who It Is For
- Galvanizing line operators
- Automotive sheet producers
- Steel plants upgrading a levelling section
- Project teams specifying a new coating line
Problems It Solves
- Uneven longitudinal extension across the strip width
- Rolling stress disorder left after calendering
- Shape defects that only appear after cutting
- Formability problems in downstream stamping
Technical Features
Machine arrangement.
Tension Stabilisation
Two tension rolls at the inlet and outlet stabilise tension and reduce fluctuation before the strip reaches the bending section.
Straightening Unit
The straightening unit carries two rows of bending components together with balancing rollers.
Two Stage Correction
In the first stage the strip undergoes alternating deformation to distribute residual deformation evenly, which the second stage then fully corrects.
Specifications
Machine configuration follows the coating line. Scope is defined per project.
| Application | Galvanizing line, carbon steel strip |
|---|---|
| Tension Rolls | 2 sets, inlet and outlet |
| Bending Rows | 2 rows with balancing rollers |
| Correction Stages | 2, alternating deformation then full correction |
| Defects Removed | Bilateral wave, unilateral wave, middle wave, two rib wave, warping, buckling |
| Typical Products | Strip for car bodies, doors and roofs |
Materials
- Welded and machined machine frame
- Alloy steel work, intermediate and back up rolls
- Hydraulic bending and tension roll drives
Manufacturing Process
Line Study
Strip range, line speed and incoming shape data set the roll configuration.
Frame And Housing Production
Housings are machined so roll centres hold position under bending load.
Roll System Manufacture
Work, intermediate and back up rolls are produced and ground together.
Assembly And Test
The machine is assembled and roll parallelism and drive alignment are verified.
Quality Control
- Frame machining inspection
- Roll hardness and geometry records
- Hydraulic and drive function test
- Assembly alignment report
Customization Options
- Strip width and thickness range to your line
- Roll count and diameters for the target flatness
- Drive and automation interface
- Integration into an existing galvanizing line
Use Guide
- Set tension and elongation from the incoming shape reading
- Check balancing roller settings after a product change
- Regrind work rolls before the surface prints onto the strip
- Keep records of leveling settings per product for repeatability
How It Compares
Levelling options for a galvanizing line.
| Roller leveler without tension | Applying tension with bending redistributes internal stress instead of only bending out the visible defect. |
|---|---|
| Single stage correction | Two stage correction first distributes residual deformation evenly, then corrects it, which holds the result after cutting. |
| Correcting shape at the mill | A dedicated levelling machine handles the shape defects that rolling leaves behind economically. |
Related Products
Tension Leveler for Aluminum Coil
Stress homogenising tension leveler for 0.2-4.0 mm aluminum strip at up to 500 m/min.
View DetailsTension Leveling Machine for Aluminum Plate
Two stage tension and bending machine removing three dimensional shape defects from aluminum plate.
View Details
Leveling Machine for Color Coating Lines
Tension and bending leveler preparing carbon steel strip for the coating section.
View Details
Tension Leveller With Two Bending and Two Levelling Stages
Two bending and two levelling stage leveller for carbon steel in galvanizing lines.
View DetailsRelated Project References
Tension Leveler For A 1550 mm Galvanizing Line
A tension leveler configuration for carbon steel strip on a 1550 mm galvanizing line, with the chrome plated roll set to keep it consistent.
Read More
Leveler For An 850 mm Cut To Length Line
A compact leveler for a narrow cut to length line producing blanks for electrical parts and automotive components.
Read MoreRelated Technical Articles
Tension Leveler For Steel Coil Working Principle And Specifications
Double bending and double straightening, the three stage sequence inside the machine, and the specification envelope it works in.
Read More
Maintaining A 23 Roll Tension Leveler For Aluminum Plate
Overload, roll wrapping and lubrication are the three operating mistakes that destroy work rolls on aluminum lines.
Read MoreLevelling Machine for Galvanizing Lines FAQ
Which defects does the machine remove?
Bilateral wave, unilateral wave, middle wave, two rib wave, warping, buckling and latent poor plate shape.
How does the two stage correction work?
In the first stage the strip undergoes alternating deformation so residual deformation is evenly distributed. The second stage fully corrects it, improving shape and mechanical properties.
What products is it used for?
Carbon steel strip in galvanizing lines, including strip for car bodies, doors, roofs and similar components.
Can it be installed in our existing line?
Yes. Send the line layout, available length, speed and tension data and we confirm the configuration.
Do you supply the replacement rolls?
Yes, the complete roll system is manufactured here, so spares match the original drawing.
What do you need for a quotation?
Strip width and thickness range, steel grade, line speed, incoming and target flatness, and whether the machine is new or a replacement.
Specify A Levelling Machine
Send your strip programme and line data and our engineers come back with a machine configuration.