CN2183225Y - Leveling roll for improving cold-rolled thin steel plate use-performance - Google Patents
Leveling roll for improving cold-rolled thin steel plate use-performance Download PDFInfo
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- CN2183225Y CN2183225Y CN 93221264 CN93221264U CN2183225Y CN 2183225 Y CN2183225 Y CN 2183225Y CN 93221264 CN93221264 CN 93221264 CN 93221264 U CN93221264 U CN 93221264U CN 2183225 Y CN2183225 Y CN 2183225Y
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Abstract
The utility model relates to a leveling work roll, especially a work roll used for a thin steel plate which has good flattening stamping performance, good coating brightness and good firmness. The utility model has the specific solution of a leveling roll for improving the use performance of a cold roll thin steel plate. The utility model is characterized in that the arithmetical mean (namely, the surface roughness is Ra) of the figure height centerline of the surface of the leveling roll is in a range of 0.3 to 2.0 micrometers. The micro shape which forms the surface roughness is an oval sealing type micro pit. A horseshoe-shaped bulge is arranged on the circumference of the long side of an oval. The horseshoe-shaped bulge forms a smooth shape. The utility model is manufactured in a laser texturing method. The utility model has the advantages of improved use performance of the cold roll thin steel plate, improved production ratio and high production efficiency.
Description
The utility model relates to a kind of smooth working roll, in particular for smooth punching performance and coated layer brightness and all good steel-sheet working roll of firmness.
The flattening process of cold-reduced sheet has two purposes: the one, roll physics yield point and yield point elongation, the 2nd, to the certain pattern of plate face with the punching performance that improves institute's rolled steel plate and be coated with, the coating brightness, improve extension property.Existing cold rolling levelling technology generally adopts shot-peening texturing roller, promptly with having the small ball of certain size under action of high-speed airflow, be ejected into roller surface, form little hole by local deformation, simultaneously the material of active region is because of cold deformation harden (roll surface hardness than shot-peening before slightly improve).Because the meeting in the shot-peening process of the size of steel ball constantly reduces because of wearing and tearing even breaks, they are at irregular, deep mixed, the skewness of size and dimension in little hole that roller surface forms.Because roll surface hardness is lower, copy to by the size and dimension decay of the roll surface pattern on rolled steel plate surface very soon, poor reproducibility influences the uniformity of plate surface quality.In addition, the shot blasting equipment floor space is big, can fragmentation take place, produce dust and noise pollution by invar ball impact roll in the shot-peening process.
The purpose of this utility model provides a kind of cold-strip steel serviceability of improving, and improves the smooth working roll of lumber recovery and production efficiency.
The concrete solution of the utility model is: a kind of smooth working roll that is used to improve the cold-reduced sheet serviceability, it is characterized in that: this roll surface profile height center line arithmetic mean of instantaneous value (that is: surface roughness Ra) is within 0.3～2.0 micron this scope, the micro-elliptical closed hole that declines that is shaped as that constitutes above-mentioned surface roughness, there is a horseshoe-shaped projection at periphery place in the long limit of ellipse trend, and the parameter of its cross dimensions satisfies following condition:
Little hole outer rim is respectively along the diameter of major axis and minor axis: D1, D2;
Little hole inner edge is respectively along the diameter of major axis and minor axis: d1, d2;
The little hole of long axis direction distance between centers is: Sm1;
The little hole of short-axis direction distance between centers is: Sm2;
Little hole outer rim average diameter: D=(D1+D2)/2,50 μ m＜D＜250 μ m;
Average distance in the heart in little hole: Sm=(Sm1+Sm2)/2,
50μm＜Sm＜250μm；
Convex closure height: h≤5 μ m;
The hole degree of depth: H≤10 μ m and, 1% of H≤institute's rolled steel plate thickness;
Ovality: 0.5≤e=a/b≤2.0.
Wherein, horseshoe-shaped projection is the sliding shape in garden.This smooth working roll makes with laser texturing method.
The design of smooth work roll surface pattern is corresponding with the flatness parameter on institute rolled steel plate surface; The surface of steel plate flatness satisfies following relational expression:
General layout degree in the n-unit are; Wherein, 0.6＜n＜0.95
General layout degree in the n1-unit are;
Hole outerplanar degree in the n2-unit are;
Under the condition of Sm1/D1 〉=1 Sm2/D2 〉=1, have:
n＝n1＋n2＝1－0.785D1D2（1－k1k2）／（Sm1·Sm2）
In the formula: 0≤k1=d1/D1≤1,0＜k2=d2/D2≤1.
Above-mentioned little hole and projection have a surfaces hardened layer, and the hardened layer structure comprises: surface layer ultra fine crystal grain and cryptocrystalline martensite hardened layer, and layer depth is 10～30um; The heat affected area of the second layer; The matrix of internal layer.
The utility model has been owing to adopted the design of above-mentioned roller surface pattern, can improve working roll and the friction and the lubricating condition of being rolled between the sheet metal when smooth effectively, and raising skin pass rolling speed helps improving plate shape.In addition, above-mentioned pattern design can also improve the flatness of surface of steel plate and improve the adhesive force of steel plate to coated layer by the little hole of the shape of a hoof with definite shape and distribution when fully guarantee to be rolled the sheet metal punching performance effectively.
The utility model has adopted the laser roughening processing method, presses certain distribution partial melting roll surface material with pulse laser at roller surface that is:, with assist gas fused mass is blown out the molten bath simultaneously and cool off the formation convex closure outside pool side edge and pond.Because heat time heating time is very brief, very big by roll self chilling temperature gradient, fused mass cools off, forms intensity and the wear-resistant ability that ultra-fine grain (average crystal grain diameter (≤1 μ m) is 1/tens of existing processing method) has increased material rapidly.Because local laser quenching, three layers of hardened layer structure have been formed in the roller surface active region: surface layer ultra fine crystal grain and cryptocrystalline martensite hardened layer, its hardness 〉=HRV900, the about 20 μ m of layer depth; The second layer is the heat affected area, and its hardness is about: HRV850, the about 20 μ m of thickness; Internal layer is original matrix, and its hardness is about: HRV800(as shown in Figure 1).Because above-mentioned processing, the pit that forms at roll surface is strengthened lubrication by oil storage in the operation of rolling, collect the broken particle of wearing and tearing simultaneously; The roll surface convex closure of the high rigidity steel plate of in the operation of rolling, nipping rapidly, thereby reduce skidding in rolling, improved steel-sheet surface quality and plate shape.Smooth working roll is after laser roughening is handled, hardness 〉=the HRV900 of partial melting hardening point, can form on the roller surface preferably in softer relatively, toughness like this and press the equally distributed hard point of certain interval, these hard points can improve the abrasive resistance of roll greatly, softer matrix then can play the distortion cushioning effect, helps improving the service life of roll.
Compare with the smooth sheet metal that goes out of shot-peening roller, through the smooth surface of thin steel sheet hole shape rule that goes out of laser roughening roller, evenly; Size, distribute controlled, the flatness height; The convex closure slyness, plate shape is good, surface quality is good, yield rate is high; Erichsen number improves 5～10% than the smooth plate face that goes out of shot-peening roller, improves 10～20% than emery wheel polishing rolled sheet; Percentage elongation improves more than 5%.Simultaneously, the laser roughening roller life-span is long, hardness is high, good work environment (as shown in Figure 4).
Fig. 1 is the signal of the utility model YAG laser roughening little hole modification (sclerosis) situation.
Fig. 2 is the sectional drawing of the utility model surface micro-pit shape.
Fig. 3 is a shape appearance figure of the present utility model.
Fig. 4 compares in the utility model and shot-peening texturing roller life-span.
Fig. 5 is that the utility model plate face hole shape and flatness are calculated schematic diagram.
In Fig. 1,1 is hardened layer, and 2 is the heat affected area, and 3 is matrix.
In Fig. 4,4 is laser roughening roller life curve, and 5 is shot-peening texturing roller life curve.
Below in conjunction with accompanying drawing the utility model is further described: a kind of smooth working roll that is used to improve the sheet metal serviceability, it is characterized in that: the surface profile height center line arithmetic mean of instantaneous value (that is: surface roughness Ra) of this roll is in 0.3～2.0 micron this scope, constitute above-mentioned shaggy micro-being shaped as: the elliptical closed hole that declines, there is a horseshoe-shaped projection at periphery place in the long limit of ellipse trend, and the parameter of its cross dimensions satisfies following condition:
Little hole outer rim is respectively along the diameter of major axis and minor axis: D1, D2;
Little hole inner edge is respectively along the diameter of major axis and minor axis: d1, d2;
The little hole of long axis direction distance between centers is: Sm1;
The little hole of short-axis direction distance between centers is: Sm2;
Little hole outer rim average diameter: D=(D1+D2)/2, D=120 μ m;
Average distance in the heart in little hole: Sm=(Sm1+Sm2)/2, Sm=150 μ m;
Convex closure height: h=2 μ m;
The hole degree of depth: H=3 μ m and, 1% of H≤institute's rolled steel plate thickness;
Ovality: e=a/b=1.5.
Wherein, horseshoe-shaped projection is slick and sly shape (shown in Fig. 2,3).This smooth working roll is made by laser texturing method.
The design of smooth work roll surface pattern is corresponding with the flatness parameter on institute rolled steel plate surface; Steel plate plane surface degree satisfies following relational expression:
General layout degree in the n-unit are; N=0.7
Hole inner plane degree in the n1-unit are;
Hole outerplanar degree in the n2-unit are;
Under the condition of Sm1/D1 〉=1 Sm2/D2 〉=1, have:
n＝n1＋n2＝1－0.785D1D2（1－k1k2）／（Sm1·Sm2）
In the formula: 0≤k1=d1/D1≤1,0＜k2=d2/D2≤1.
Above-mentioned projection has a surfaces hardened layer, and the hardened layer structure comprises: surface layer ultra fine crystal grain and cryptocrystalline martensite hardened layer, and layer depth is 20 μ m; The heat affected area of the second layer; The matrix of internal layer.(as shown in Figure 1)
In order to obtain existing good press formability, the priming sheet of good coated layer brightness and adhesive force is arranged again, must seek one group and the corresponding pattern parameter of surface of steel plate optimum profile on smooth work roll surface.
Claims (4)
1, a kind of smooth work roll that is used to improve the cold-reduced sheet serviceability, it is characterized in that: this roll surface profile height center line arithmetic mean of instantaneous value (that is: surface roughness Ra) is in 0.3～2.0 micron this scope, the micro-elliptical closed hole that declines that is shaped as that constitutes above-mentioned surface roughness, there is a horseshoe-shaped projection at periphery place in the long limit of ellipse trend, and the parameter of its cross dimensions satisfies following condition:
Little hole outer rim is respectively along the diameter of major axis and minor axis: D1, D2;
Little hole inner edge is respectively along the diameter of major axis and minor axis: d1, d2;
The little hole of long axis direction distance between centers is: Sm1;
The little hole of short-axis direction distance between centers is: Sm2;
Little hole outer rim average diameter: D=(D1+D2)/2,50 μ m＜D＜250 μ m;
Average distance: Sm=(Sm1+Sm2)/2,50 μ m＜Sm＜250 μ m in the heart in little hole;
Convex closure height: h≤5 μ m;
The hole degree of depth: H≤10 μ m and, 1% of H≤institute's rolled steel plate thickness;
Ovality: 0.5≤e=a/b≤2.0;
Horseshoe-shaped projection is slick and sly shape; This smooth working roll makes with laser texturing method.
2, the smooth working roll that is used to improve the cold-reduced sheet serviceability according to claim 1, it is characterized in that: the design of smooth work roll surface pattern is corresponding with the flatness parameter on institute rolled steel plate surface; The surface of steel plate flatness satisfies following relational expression:
General layout degree in the n-unit are; Wherein, 0.6＜n＜0.95
Hole flatness in the n1-unit are;
Hole outerplanar degree in the n2-unit are;
Under the condition of Sm1/D1 〉=1 Sm2/D2 〉=1, have:
n＝n1＋n2＝1－0.785D1D2（1－k1k2）／（Sm1·Sm2）
In the formula: 0≤k1=d1/D1≤1,0≤k2=d2/D1≤1
3, the smooth working roll that is used to improve the cold-reduced sheet serviceability according to claim 1 and 2, it is characterized in that: described little hole and projection have a surfaces hardened layer; The hardened layer structure comprises: surface layer ultra fine crystal grain and cryptocrystalline martensite hardened layer, the heat affected area of the second layer and the matrix of internal layer.
4, the smooth working roll that is used to improve the cold-reduced sheet serviceability according to claim 3 is characterized in that: the thin brilliant and cryptocrystalline martensite hardened layer layer depth in top layer is: 10～30 μ m, internal layer are original matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93221264 CN2183225Y (en) | 1993-08-12 | 1993-08-12 | Leveling roll for improving cold-rolled thin steel plate use-performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93221264 CN2183225Y (en) | 1993-08-12 | 1993-08-12 | Leveling roll for improving cold-rolled thin steel plate use-performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2183225Y true CN2183225Y (en) | 1994-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93221264 Expired - Fee Related CN2183225Y (en) | 1993-08-12 | 1993-08-12 | Leveling roll for improving cold-rolled thin steel plate use-performance |
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| CN (1) | CN2183225Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104210212A (en) * | 2013-05-30 | 2014-12-17 | 特诺恩股份公司 | Lamination Cylinder |
| CN104551701A (en) * | 2014-08-21 | 2015-04-29 | 江苏大学 | Composite micro-texturing guide rail |
| CN108136454A (en) * | 2015-09-23 | 2018-06-08 | Posco公司 | The manufacturing method of surface quality and the excellent coated steel sheet of punching formation property and the coated steel sheet manufactured by this method |
| WO2019042313A1 (en) * | 2017-08-29 | 2019-03-07 | 宝山钢铁股份有限公司 | Metal sheet having low friction coefficient and low waviness |
| CN109514174A (en) * | 2011-09-30 | 2019-03-26 | 苹果公司 | Laser-graining and anodized surface processing |
| CN110062669A (en) * | 2016-12-14 | 2019-07-26 | Posco公司 | Roll and the coated steel sheet manufactured by it |
| CN113732064A (en) * | 2020-05-27 | 2021-12-03 | 宝山钢铁股份有限公司 | Roller with pit structure on surface and preparation method thereof |
-
1993
- 1993-08-12 CN CN 93221264 patent/CN2183225Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109514174A (en) * | 2011-09-30 | 2019-03-26 | 苹果公司 | Laser-graining and anodized surface processing |
| CN104210212A (en) * | 2013-05-30 | 2014-12-17 | 特诺恩股份公司 | Lamination Cylinder |
| CN104210212B (en) * | 2013-05-30 | 2017-04-12 | 特诺恩股份公司 | Lamination Cylinder |
| CN104551701A (en) * | 2014-08-21 | 2015-04-29 | 江苏大学 | Composite micro-texturing guide rail |
| CN108136454A (en) * | 2015-09-23 | 2018-06-08 | Posco公司 | The manufacturing method of surface quality and the excellent coated steel sheet of punching formation property and the coated steel sheet manufactured by this method |
| CN108136454B (en) * | 2015-09-23 | 2020-11-24 | Posco公司 | Method for producing plated steel sheet having excellent surface quality and press formability, and plated steel sheet produced by the method |
| CN110062669A (en) * | 2016-12-14 | 2019-07-26 | Posco公司 | Roll and the coated steel sheet manufactured by it |
| WO2019042313A1 (en) * | 2017-08-29 | 2019-03-07 | 宝山钢铁股份有限公司 | Metal sheet having low friction coefficient and low waviness |
| US11559829B2 (en) | 2017-08-29 | 2023-01-24 | Baoshan Iron & Steel Co., Ltd. | Metal sheet having low friction coefficient and low waviness |
| CN113732064A (en) * | 2020-05-27 | 2021-12-03 | 宝山钢铁股份有限公司 | Roller with pit structure on surface and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |