TPT May 2011

T ube M ills & R oll F orming M achines

Hydraulic roll plate bending

SINCE 1971 Sergi has specialised in the design and construction of roll plate bending machines and profile bending machines. After 35 years’ experience, the company began conceiving new high-level models aimed at the processing of high thicknesses (up to 200mm). The new EvoRoll is a hydraulic roll plate bending machine with three rolls, with

variable geometry, able to process steel plates from 10 to 200mm thickness. The two side rolls can move independently, creating any geometry necessary for processing, and so reducing the flat end of pre-bending. The machine is particularly suited to rolling high thickness pipes, tubes and segment of cones for applications such as pressure vessels, oil and gas industry,

pipelines, heavy turbine, wind towers, tanks and shipyards. The main advantages of the EvoRoll machine are the ability to produce cones of high thickness thanks to the high tilting of side rolls (up to 130mm) and the Sergi brake system with moving heads. The machine is equipped with a quick release system for the fast changing of the top roll, with the ability to increase the range of working thickness. The guides of the rolls and the moving parts of the machine are made of bronze- graphite, self-lubricating to eliminate the use of additional lubrication, with the advantage of keeping the guides free from grease and oil. All machine movements are controlled by a Siemens PLC. This uses an internally developed program that manages the main functions of the machine positioning. The hydraulic system is completely controlled by a PLC, which allows the simultaneous movement of perfect translation and rotation of the upper roller and translation of the lower rollers, with gains in speed and production efficiency. Sergi Srl – Italy system allows the operator to electronically dial in the roll stands for proven recipes of individual product and gauge changes. Additionally, this mill was designed to be serviced by an overhead crane system assisting in the change out of the subplates. The subplates are held to the base by a quick release hydraulic clamping system, which allows the subplates to be connected rigidly and precisely to the mill base and, when necessary, disconnected from the base quickly and efficiently. “The increased capacity of this new mill enhances our ability to meet the needs of our customers and at the same time keeps our plant overhead to a minimum, keeping us extremely competitive in these changing markets,” stated Lee Searing, president of Searing Industries. T & H Lemont – USA Email: bcharvat@thlemont.com Website: www.thlemont.com Fax: +39 030611820 Email: sales@sergi.it Website: www.sergi.it

Sergi’s EvoRoll

Dual capacity high-frequency quick-change tube mill

T&H LEMONT has recently commissioned a new dual capacity, quick change tube mill system. This dual capacity mill is capable of producing standard mechanical rounds and hollow structural shapes for both small and large sizes. The dual capacity tube mill system was developed by T&H Lemont in conjunction with Searing Industries, USA. Searing Industries approached T&H Lemont with the need to increase production of a wide range of structural products on a single production platform. The dual capacity mill allows for a greater range of production sizes in a minimal amount of floor space. In effect, the dual capacity mill gives a pipe and tube producer the ability to produce a range of pipe and tubing normally produced from two different sized mills. With a dual capacity mill, the entire entry and exit equipment are designed to be universal; as are the mill bases and

drive systems. The “dual capacity” of this mill is realised by two different (size) sets of quick change subplates designed to mount on a single mill base system while utilising a universal drive system. One set of subplate mounted driven stands (T&H Model WU35M-12) was designed for producing “mother” tubes from 1.250" to 5.000" with wall thickness from 0.083" to 0.250". The second set of subplates (T&H Model WU60M-12) was designed to produce “mother” tubes from 3.750" to 8.000" diameter with wall thickness from 0.125" to 0.500". The distance between the stands was optimised on each set of subplates for the products produced. Each set of subplates included three driven squaring clusters to form the shapes. Production was furthermore increased and change-over times minimised by employing the new T&H autoset automatic stand adjusting system. This motorised, programmable

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M ay 2011

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