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Computing method for roll profile of steckel mill

A roll shape and furnace coil mill technology, applied in the field of calculation of the roll shape of a furnace coil mill, can solve problems such as roll peeling

Inactive Publication Date: 2009-07-08
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to improve the force between the rolls, a certain chamfer can be applied to the support roll, but during the rolling process, the pressure between the rolls at the chamfer is too large, especially in the middle and late stages of the work cycle of the roll, the chamfer at the chamfer The pressure between the rolls rises even more, image 3 It is the distribution diagram of the inter-roll pressure along the roll body direction (L) when the backup roll adopts chamfered roll and the work roll adopts flat roll, and the roll still has the risk of spalling here

Method used

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  • Computing method for roll profile of steckel mill
  • Computing method for roll profile of steckel mill
  • Computing method for roll profile of steckel mill

Examples

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Embodiment 1

[0065] In this embodiment, a certain furnace rolling mill is taken as an example. The size of the backup roll is Φ1950mm×3400mm (roll diameter×roll body length), the size of the working roll is Φ1010mm×3500mm (roll diameter×roll body length), and the typical product is X70 pipeline steel , the specification is 10mm×3000mm, the blank size used is 150mm×3000mm (thickness×width), and the rolling procedure is 150mm→131mm→112mm→100mm→88mm→77mm→68mm→58mm→50mm→42mm→35mm→30mm→25mm →21mm→18mm→16mm→14mm→12mm→11mm→10mm.

[0066] The calculation method of the roll shape of the steel-steel mill of the present invention is used for calculation, wherein the calculation of the pressure distribution between the rolls and the thickness distribution of the rolled piece is carried out by the influence function method, and the original support rolls and work rolls are all flat rolls, resulting in the edge of the support roll. Large area peeling off at the top, chamfering (2mm × 200mm, height × len...

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Abstract

The invention relates to a method for calculating the roll shape in the field of metallurgy, in particular to a method for calculating the roll shape of a steckel mill. The invention adopts the calculation method which influences a function method or a finite element method, and considers designing the original roll shape of rolls on the basis of abrasion and thermal expansion of the rolls under the condition of certain rolling procedures. The method calculates the rolling force and the deflection and wafering of working rolls and supporting rolls according to the rolling procedures, and then calculates the rolling force, the contact pressure between the rolls and the thickness distribution conditions of rolling pieces so as to obtain reasonable roll shape of which the pressure between the rolls is reasonably distributed and the plate convexity meets the requirements, of the supporting rolls and the working rolls, and the roll bending force. By adoption of the method to design the supporting rolls and the working rolls, the pressure distribution state between the rolls of the supporting rolls and the working rolls can be obviously improved, spallation of the rolls is inhibited, and simultaneously the plate convexity requirement can be met.

Description

technical field [0001] The invention relates to a calculation method of a roll profile in the field of metallurgy, in particular to a calculation method for a roll profile of a steckel mill. Background technique [0002] When the rolling method is used to produce metal sheets and strips, reducing the radius of the rolls can reduce the rolling force, but at the same time it also reduces the bending resistance of the rolls, making the cross-section of the rolled piece more convex, that is, the convexity of the plate becomes larger , leading to product failure in severe cases. In order to reduce the rolling force while suppressing roll bending, the steckel mill adopts a four-high rolling mill, that is, a pair of work rolls with a smaller diameter and a pair of backup rolls with a larger diameter, and the back-up rolls are pressed against the work rolls. On the surface, the back-up rolls are mounted on the mill stand through the back-up roll chocks. During rolling, the deforma...

Claims

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Application Information

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IPC IPC(8): G05B19/18
Inventor 党军王道远周成张建国郭怀兵滕达杨兆根李强
Owner NANJING IRON & STEEL CO LTD
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