CN204486462U - Control the vertical roll shape of side defects of strip steel - Google Patents
Control the vertical roll shape of side defects of strip steel Download PDFInfo
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- CN204486462U CN204486462U CN201420764938.6U CN201420764938U CN204486462U CN 204486462 U CN204486462 U CN 204486462U CN 201420764938 U CN201420764938 U CN 201420764938U CN 204486462 U CN204486462 U CN 204486462U
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Abstract
The utility model discloses kind of the vertical roll shape controlling side defects of strip steel, the dog bone formed after comprising slab and slab side pressure.The pass of the height of dog bone and size of plate blank, roller footpath and lateral pressure amount is: Hb=h0 [1+a × (de/we) × b (Re/We) × c × (h0/w0) × d].Wherein, a, b, c, d are constant, and Hb is the dog bone height formed after slab side pressure, and Re is vertical rolls footpath, and w0 is width before slab side pressure, and we is width after slab side pressure, and de is slab lateral pressure amount, and de=w0-we.The vertical roll shape of control side defects of strip steel of the present utility model obviously can reduce the incidence of side defects of strip steel.
Description
Technical field
The utility model relates to hot rolling roughing vertical roll roll shape, more particularly, relates to the vertical roll shape controlling side defects of strip steel.
Background technology
In hot rolled plate band production process, concentrate the strip edge violent with variations in temperature at stress, the most easily produce various defect, thus affect the total quality of strip, reduce the lumber recovery of product, and then reduce productivity effect.Wherein, hot-strip upper and lower surface in edge certain limit along roll to line defect the most common, be also difficult to most eliminate.Such edge fault is called edge cracks, edge black line, edge wire crackle, edge fold etc., mild degree be only trickle black line, through overpickling or cold rolling after just display, degree serious for a few mm wide stick up skin shape defect.
As shown in Figure 1, edger roll casing about 1 is parallel, and the side of the edger roll body of roll 2 is a straight line, edger roll casing 1 up and down along between be edger roll height.Vertical roll shape such in prior art just has above-mentioned defect.
To such defect, at present research thinks that producing cause mainly contains two kinds, and jarring marks, pipe, micro-crack etc. that the bight of first steel billet is darker can cause this defect, and it two is owing to forming defect due to bight temperature contrast in slab rough rolling process.Analog computation result thinks that made-up belt bight metal turn to surface and produces defect in level pressure process.Along punching on slab side, after rolling, defect is turned over to upper surface, demonstrates this process.Therefore, no matter defect producing cause why, utilizes rough rolling process to be out of shape and can improve such defect.
Utility model content
Concentrate the strip edge violent with variations in temperature due to stress for existing in prior art and produce various defect, the purpose of this utility model is to provide the vertical roll shape controlling side defects of strip steel.
For achieving the above object, the utility model adopts following technical scheme:
Control a vertical roll shape for side defects of strip steel, the dog bone formed after comprising slab and slab side pressure.The pass of the height of dog bone and size of plate blank, roller footpath and lateral pressure amount is:
Hb＝h0[1+a×(de/we)×b(Re/We)×c×(h0/w0)×d]。Wherein, a, b, c, d are constant, and Hb is the dog bone height formed after slab side pressure, and Re is vertical rolls footpath, and w0 is width before slab side pressure, and we is width after slab side pressure, and de is slab lateral pressure amount, and de=w0-we.
According to an embodiment of the present utility model, the height H 2=former body of roll height+dog bone size+control surplus of vertical roll shape.
According to an embodiment of the present utility model, vertical roll shape also comprises endless groove, and the height of endless groove is: H3=h0+d0+a.Wherein, H3 is endless groove height, and h0 is thickness before slab side pressure, and d0 is edge and roll surface difference in height under the edger roll body of roll, and a is for controlling surplus, and L3 is groove depth size.
According to an embodiment of the present utility model, the side of endless groove comprises 3 radians from top to bottom successively.
According to an embodiment of the present utility model, the span controlling surplus a is 15-30mm, and groove depth size L3 is 4-8mm.
According to an embodiment of the present utility model, the shape in dog bone cross section is one end is rectangle, other end bulge-structure.
According to an embodiment of the present utility model, the cross section of vertical roll shape is I shape.
In technique scheme, the vertical roll shape of control side defects of strip steel of the present utility model obviously can reduce the incidence of side defects of strip steel.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of vertical roll shape in prior art;
Fig. 2 is the schematic diagram of the utility model dog bone;
Fig. 3 is the schematic diagram that the utility model controls the vertical roll shape of side defects of strip steel;
Fig. 4 is the partial enlarged drawing of Fig. 3 dotted line frame.
Detailed description of the invention
The technical solution of the utility model is further illustrated below in conjunction with drawings and Examples.
For solving edger roll to a side defects of strip steel difficult problem, the utility model discloses a kind of vertical roll shape controlling side defects of strip steel, it dog bone 3 formed after comprising slab and slab side pressure.Test through too much round, vertical roll shape of the present utility model have found the best vertical roll shape improving side defects of strip steel, describes shape and the dimensional parameters thereof of vertical roll shape of the present utility model below in detail.
(1) pass is dimensionally-optimised
Slab can produce local protuberance in slab edge and be called for short " dog bone " after edge rolling, and the shape in dog bone 3 cross section is one end is rectangle, other end bulge-structure.Causing slab edge to occur abrading along there is friction under dog bone 3 and edger roll casing, carrying out having influence on band steel finished product quality of edges.
Therefore, first need pair roller height degree to be optimized, avoid dog bone 3 position and edger roll casing to scratch.After slab side pressure, dog bone 3 shape is as shown in Figure 2, and the cross section of vertical roll shape is I shape, and L2 is relevant with size of plate blank, roller footpath and lateral pressure amount for its height, and its computing formula is:
Hb＝h0[1+a×(de/we)×b(Re/We)×c×(h0/w0)×d]
Wherein, a, b, c, d-constant
Dog bone 3 height formed after the side pressure of Hb-slab
Re-vertical rolls footpath
Width before the side pressure of w0-slab
Width after the side pressure of we-slab
De-slab lateral pressure amount=w0-we
Thickness before the side pressure of h0-slab
After dog bone 3 size is determined, pass size and body of roll height are optimized, obtain optimum pass size H2.It is of a size of H2 after optimizing:
Height H 2=former body of roll height+dog bone 3 size+control surplus of vertical roll shape.
(2) body of roll increase has the endless groove 4 of reconditioning function:
Slab after edger roll side pressure on raw sheet base edge turn over to belt steel surface and form a line with corner angle, in the follow-up operation of rolling, because edge temperature comparatively declines very fast in center, cause edge plasticity to be deteriorated, produce local fracture situation, formation edge line defect.
As shown in Figure 3 and Figure 4, in order to reduce the generation that edge line defect occurs, vertical roll shape also comprises endless groove 4, namely on the body of roll, the endless groove 4 that one has reconditioning function is increased newly, in side pressure process, former steel edge portion is carried out reconditioning by arcwall face to shape, after reconditioning, steel edge portion is converted into the arc of a rounding off by the line with corner angle.As shown in Figure 4, the side of endless groove 4 comprises 3 radians from top to bottom successively.
The determination of the height of newly-increased endless groove 4 is mainly subject to the impact of slab thickness and roller-way absolute altitude, and its specific formula for calculation is:
H3＝h0+d0+a
Wherein H3-endless groove 4 height
Thickness before the side pressure of h0-slab
Edge and roll surface difference in height under the d0-edger roll body of roll
A-controls surplus (empirical value 15-30mm)
The form of its endless groove 4 as shown in Figure 4, determine according to test data by its groove depth size L3 and cell body radian really normal root.
L3-groove depth size (4-8mm)
Cell body radian-radian 1, radian 2, radian 3 (R value is 10-25mm)
In sum, feature of the present utility model is:
(1) hole type roll body of roll size is optimized, reduces pass to the impact of steel edge portion.
(2) there is in the body of roll increase endless groove 4 of edge reconditioning function.
(3) the edger roll local body of roll becomes the taper body of roll from plain-barreled roll.
Those of ordinary skill in the art will be appreciated that, above embodiment is only used to the utility model is described, and be not used as restriction of the present utility model, as long as in spirit of the present utility model, all will drop in Claims scope of the present utility model the change of the above embodiment, modification.
Claims (7)
1. control a vertical roll shape for side defects of strip steel, the dog bone formed after comprising slab and slab side pressure, is characterized in that:
The pass of the height of described dog bone and size of plate blank, roller footpath and lateral pressure amount is:
Hb＝h0[1+a×(de/we)×b(Re/we)×c×(h0/w0)×d]；
Wherein, a, b, c, d are constant, and Hb is the dog bone height formed after slab side pressure, and Re is vertical rolls footpath, and w0 is width before slab side pressure, and h0 is thickness before slab side pressure, and we is width after slab side pressure, and de is slab lateral pressure amount, and de=w0-we.
2. the vertical roll shape controlling side defects of strip steel as claimed in claim 1, is characterized in that, the height H 2=former body of roll height+dog bone size+control surplus of described vertical roll shape.
3. the vertical roll shape controlling side defects of strip steel as claimed in claim 2, it is characterized in that, described vertical roll shape also comprises endless groove, and the height of described endless groove is:
H3＝h0+d0+a；
Wherein, H3 is endless groove height, and h0 is thickness before slab side pressure, and d0 is edge and roll surface difference in height under the edger roll body of roll, and a is for controlling surplus, and L3 is groove depth size.
4. the vertical roll shape controlling side defects of strip steel as claimed in claim 3, it is characterized in that, the side of described endless groove comprises 3 radians from top to bottom successively.
5. the vertical roll shape controlling side defects of strip steel as claimed in claim 4, it is characterized in that, the span of described control surplus a is 15-30mm, and groove depth size L3 is 4-8mm.
6. the vertical roll shape controlling side defects of strip steel as claimed in claim 1, it is characterized in that, the shape in described dog bone cross section is one end is rectangle, other end bulge-structure.
7. the vertical roll shape controlling side defects of strip steel as claimed in claim 1, it is characterized in that, the cross section of described vertical roll shape is I shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420764938.6U CN204486462U (en) | 2014-12-08 | 2014-12-08 | Control the vertical roll shape of side defects of strip steel |
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| CN201420764938.6U CN204486462U (en) | 2014-12-08 | 2014-12-08 | Control the vertical roll shape of side defects of strip steel |
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| CN204486462U true CN204486462U (en) | 2015-07-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605132A (en) * | 2020-11-30 | 2021-04-06 | 山西太钢不锈钢股份有限公司 | Rolling method for controlling stainless steel strip steel edge straight crack |
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2014
- 2014-12-08 CN CN201420764938.6U patent/CN204486462U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605132A (en) * | 2020-11-30 | 2021-04-06 | 山西太钢不锈钢股份有限公司 | Rolling method for controlling stainless steel strip steel edge straight crack |
| CN112605132B (en) * | 2020-11-30 | 2022-03-22 | 山西太钢不锈钢股份有限公司 | Rolling method for controlling stainless steel strip steel edge straight crack |
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