Benefits about Levelling machine
Leveling machine is a machine that stretches plastic strips by applying tension and continuous bending to improve their shape.
Two tension rolls at the inlet and outlet stabilize tension and reduce fluctuations. The tension is increased by the roll group.
The straightening unit has two rows of bending components and balancing rollers. In the first stage, the strip undergoes alternating deformation to evenly distribute residual deformation, which is fully corrected in the second stage, improving the strip’s shape and mechanical properties.
Levelling machine is used to eliminate all kinds of three-dimensional plate shape defects such as bilateral wave, unilateral wave, middle wave, two-rib wave, warping, buckling and potential bad plate shape.
In the process of calendaring strip, the above-mentioned plate shape defects will be occurred in the coiled strip due to bad roll shape and roll gap shape. These defects are caused by the uneven longitudinal extension of the rolled piece in width direction and the disorder of rolling stress. In order to eliminate the bad shape of the coiled strip and make the internal stress tend to be uniform, the coiled strip needs to be corrected.
The structure of leveling machine is two bending and two leveling single drive type,the parts as below,
| No. | Name | Drawing no. | Qty. | Remarks |
| 1 | Frame | 1 set | ||
| 2 | Φ30 bottom bending roll units | 2 sets | ||
| 3 | Φ30 top bending roll units | 2 sets | ||
| 4 | Locking device | 2 sets | ||
| 5 | Φ200 top straightening roll units | 4 sets | ||
| 6 | Bottom lifting device | 1set | ||
| 7 | Φ50 anti-horizontal bending roll units | 1set | ||
| 8 | Φ70 anti-vertical bending roll units | 1set | ||
| 9 | Roll change device | 1set |
Scope of supply
Mechanical part: Main machine and roll change device of double bending and double straightening machine (excl. anchor bolt, valve table and guide rail);
Electrical part:the electrical wiring on the host is connected to the junction box of the host;
Hydraulic part: Include only the hydraulic pipe, and leave the interface on the transmission side;
Packing
Tension Leveller with Vacuum-packed and wooden case packing.
Application of Levelling machine
- Extensively used in the field of Iron and steel manufacturing.
Steel manufacturing is one of the main application areas of tension leveling machines, which are usually used in casting, rolling, drawing, straightening and other links. In the construction of high-speed railway, the tension leveler is also very important. - Popular use for Rail transit.
In addition to high-speed railways, subways, trams, airport integrated transportation hubs and other transportation construction all need to use tension straighteners for the processing of metal sheets. - Widely utilized in Automobile manufacturing field.
Automobile manufacturing is also one of the main application areas of tension leveling machines.Tension levelers can be used to process car bodies, doors, roofs and other components. - Used in the entertainment industry home appliance manufacturing like Televisions, refrigerators, air conditioners and other household appliances also need tension leveling machines for plate processing in the manufacturing and production process.
In conclusion, the levelling machine is a critical component within the continuous hot-dip galvanizing line for carbon steel. Its primary function is to eliminate yield point elongation and flatten the strip, ensuring superior strip flatness and surface quality prior to the galvanizing pot. This is achieved through precise control of tension and bending across a series of work rolls. Effective levelling is paramount for achieving a uniform, defect-free zinc coating, which directly correlates to the final product’s corrosion resistance, formability, and overall commercial value. The machine’s performance is thus integral to producing high-quality galvanized steel for automotive and construction applications.
