Design method of high-order polynomial curved convex roll for bloom continuous casting straightening machine

A design method and polynomial technology, applied in the direction of design optimization/simulation, calculation, special data processing application, etc., can solve the problems such as the inability to effectively control the roll curve, insufficient design methods, and difficult processing, so as to improve the center density, The effect of avoiding surface cracks and enhancing controllability

Active Publication Date: 2019-04-16
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The double-arc type and gradual curvature type used in the above research, because the equations are not given, the processing is difficult and the roll curve cannot be effectively controlled. At present, the improvement of the center of the billet with convex rolls is well known. However, for convex rolls There are still deficiencies in the specific design method of the roller

Method used

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  • Design method of high-order polynomial curved convex roll for bloom continuous casting straightening machine
  • Design method of high-order polynomial curved convex roll for bloom continuous casting straightening machine
  • Design method of high-order polynomial curved convex roll for bloom continuous casting straightening machine

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Embodiment 1

[0042] Such as figure 1 As shown, when designing the roll shape, given the work roll body length l = 500mm, the horizontal length of the left and right edge areas lc1 = l c2 =110mm, the horizontal length of the left and right high degree polynomial curve area l s1 = l s2 =70mm, horizontal length of flat roll zone l q =140mm and roll diameter D=560mm, shaft diameter d=500mm, horizontal offset from origin s 0 =0, the next step is to draw the high-degree polynomial curve area in combination with the given parameters.

[0043] Such as figure 2 and 3 As shown, the roll body shape in the high-order polynomial curve area of ​​the work roll is extracted, and the roll shape function is fitted to obtain the roll shape function:

[0044]

[0045] where: y 2 (x)=A 3 x 3 +A 2 x 2 +A 1 x+c

[0046]

[0047]

[0048] or y 2 (x)=A 4 x 4 +A 3 x 3 +A 2 x 2 +A 1 x+c

[0049]

[0050] or y 2 (x)=A 5 x 5 +A 4 x 4 +A 3 x 3 +A 2 x 2 +A 1 x+c

[0051] ...

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Abstract

The invention belongs to the field of bloom continuous casting production, and particularly relates to a design method of a high-order polynomial curved convex roll for a bloom continuous casting straightening machine. The characteristics of the high-order polynomial curved convex roll for the bloom continuous casting straightening machine are that the roll body is composed of a section curve including an edge area, a high-order polynomial curve area and a flat roll area. The curve of the high-order polynomial curve area is drawn from the polynomial curve area with the highest order being 3-5,the edge area is a straight line connected with the high-order polynomial curve area, and the flat roll area is protruding relative to the edge area and is a straight line connected with the other end of the high-order polynomial curve region. The design method of the high-order polynomial curved convex roll for the bloom continuous casting straightening machine can greatly improve the central density of a billet and effectively control the central porosity (segregation) of the billet; surface cracks caused by stress concentration in the transition zone can be effectively avoided by smooth curve transition, control capacity of the billet shape is enhanced, and meanwhile, datamation of the transition region curve is beneficial for processing and manufacturing.

Description

technical field [0001] The invention belongs to the field of continuous casting production of blooms, and in particular relates to a design method for high-order polynomial curved convex rolls of a drawing and leveling machine for continuous casting of blooms. Background technique [0002] In the bloom continuous casting production process, the casting roll reduction of the drawing and leveling machine is often used to complete the solidification end reduction process. In order to apply a large reduction, most of the bloom continuous casting drawing and leveling machines need to increase the capacity of the hydraulic equipment to improve the compaction. Ability, the transformation cost is relatively large. According to the solidification characteristics of the bloom, its liquid core is conical, so during the pressing process of the solidification end, the deformation resistance of the billet is mainly concentrated on the shells on both sides. Therefore, if the casting slab ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): B22D11/12G06F17/50
CPCB22D11/1226G06F30/20
Inventor祭程朱苗勇李应焕关锐
OwnerNORTHEASTERN UNIV LIAONING