Rolling Mill--HUADA HEAVY INDUSTRY INC

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Rolling Mill

Rolling Mill

Application of Rolling Mill:

Rolling Mills are of major technological significance in modern society. The aims of rolling mills are to reduce the thickness and change the metallurgical properties of a metal strip as it is passed through a pair of driven parallel cylindrical rolls.
Rolled sheet metal is an important material in modern manufacturing, rolled products are found everywhere in our daily lives.
Materials too wet for fine crushing and dry screening may be wet ground in a rod mill. Practice has demonstrated the ability of a rod mill to dry grind damp materials that will pack or plug other grinding equipment. and scrap loss are reduced by correct selection of liners for the specific grinding duty. Additional benefit results from use of a backing material, such as rubber between the liners and the mill shell.

The high external roll forces cause a permanent plastic deformation of the strip, decreasing it’s thickness and producing a corresponding increase in length. The strip may be either hot or cold rolled. For example steel plate (typically > 1.5mm) is hot rolled and steel sheet (typically < 0.1mm) or aluminium foil are cold rolled.
Rolled sheet metal is an important material in modern manufacturing, rolled products are found everywhere in our daily lives. Consider rolled aluminium products:

Foil less than 0.2mm thick is used in packaging such as foil containers and wrapping, in electrical applications, building insulation and in printing industries.
0.2mm to 6mm thick has a wide variety of uses in construction industries such as sidings and roofing. Sheets also used in transport for automotive body panels, airframes and boat hulls.
Plate over 6mm thick airframes, military vehicles, construction components for buildings and bridges.

In the year 2000 alone, 3.44 million tonnes of aluminium rolled products were consumed in western Europe. Rolling mills have been in use since the fifteenth century, however increasing performance demands have recently lead to greater sophistication in rolling mill technology.
Forces can be of the order of 2,000 tonnes, strip speeds up to 120 km/hour and (in the aluminium industry) thickness as low at 0.05mm and tolerances of 5 micrometers. (This represents a tolerance of 0.1% which is “high tech” by any standard.) The mechanical systems, materials, sensors, actuators and control systems required to achieve this have undergone substantial improvement over time.

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