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Flatness defects and internal stresses cannot be avoided in the manufacture of hardened and tempered plates, even with the most up-to-date line technology. Thus, it is essential to level the plate after heat treatment, reducing internal stresses at the same time. EZHONG Metals has overcome this problem with the newly developed precision leveler, manufacturing plates of quality levels that were so far unattained. Cross-bows, longitudinal waves, or edge and center waves occur due to non-uniform deformation during hot rolling and, above all, during cooling. The plates to be leveled may have a high temperature of up to 700°C after tempering
Model | Useful Width | Yield Limit | Max. Thickness | Leveling Accuracy | Speed |
EZW43T-80X3000 | 3000mm | 360Mpa | 80mm | 1.0mm-1.5mm/m² | 6m/min |
- MANUFACTURING PROCESS
Flatness defects and internal stresses cannot be
avoided in the manufacture of hardened and tempered plates, even with the most up-to-date line
technology. Thus, it is essential to level the plate after
heat treatment, reducing internal stresses at the same
time. ANDRITZ Metals has overcome this problem with
the newly developed precision leveler, manufacturing
plates of quality levels that were so far unattained.
Cross-bows, longitudinal waves, or edge and center
waves occur due to non-uniform deformation during
hot rolling and, above all, during cooling. The plates
to be leveled may have a high temperature of up to
700°C after tempering.
-CONCEPT AND DESIGN OF THE EZHONG METALS HEAVY-PLATE LEVELER
Plates to be leveled can have thicknesses from 2.0 to 80 mm and yield points of up to 1,800 N/mm2 . Until now, it has not been possible to process such plates with the conventional plate levelers available on the market. In general, plate levelers are equipped with a block-type hydraulic adjustment system or a means of adjusting the top and bottom leveler rolls individually. A complex and delicate hydraulic control system is necessary to stabilize the adjusting process in the event of load changes. For this purpose, EZHONG Metals has enhanced the well-proven design of precision levelers that operate entirely mechanically. The leveler consists essentially of a bottom part, which accommodates the bottom rollers, and a top part for the upper rollers. Both parts are connected by four columns. The entire top part can be adjusted lengthwise and transversely towards the bottom part by means of 4 individual worm gear units.
1、High range of thicknesses covered (up to 1:30) with one leveler results in low investment costs .
2、Modular design with patented, fast exchange of leveling cassettes with various numbers of rolls and various diameters
Option to upgrade with additional leveling cassette keeps you flexible for further material requirements
1、Purely mechanical adjustment ensures highest flatness .
2、Four-column design for spherical tilting of upper leveling cassette ensures best flatness. Also for “complicated” material (edge waves)
Special safety couplings avoid damage to cardan shafts and gearbox, wear- and maintenance-free
Hot material up to 700°C can be leveled without water cooling
In the steel plant industry, HOT Levelling Machine is mainly used to correct the shape defects of metal plastic processing products and is one of the important finishing processes. During the rolling process or subsequent cooling and transportation, various shape defects often occur in rolled materials, such as bending of bars, profiles, and pipes, bending, waves, and bulges of plates and strips. Through various straightening processes, defects such as bending can be eliminated under external forces, resulting in the product reaching a qualified state.
