CN111546137A - Method for grinding combined roll profile of flatness roll convexity - Google Patents
Method for grinding combined roll profile of flatness roll convexity Download PDFInfo
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- CN111546137A CN111546137A CN202010382809.0A CN202010382809A CN111546137A CN 111546137 A CN111546137 A CN 111546137A CN 202010382809 A CN202010382809 A CN 202010382809A CN 111546137 A CN111546137 A CN 111546137A
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- convexity
- roller
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- wave waveform
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/221—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by cold-rolling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention relates to the field of stainless steel cold rolling. A method for grinding the combined roller shape with flat roller convexity features that multiple combined roller shapes with one convexity at its central part and another one with different convexity at its both ends are used. The invention has the beneficial effects that: the double-side waves and the longitudinal stripes are obviously improved, the one-time flattening rate of the machine set is greatly improved, and the folding and printing of the packing paper are correspondingly and greatly reduced after the board shape is improved.
Description
Technical Field
The invention relates to the field of stainless steel cold rolling.
Background
The flattening process is the final process of the cold-rolled stainless steel strip and plays an important role in the shape and surface quality of the stainless steel strip.
In the prior art, the convexity roller profile of the leveling roller is a single sine curve (the convexity single roller profile), and in the leveling process, if a small convexity roller is adopted for leveling, the edge wave cannot be eliminated; if the large-convexity roller is adopted to eliminate the edge waves, a large-belly plate is generated along with the middle of the strip steel, and the single roller type causes the plate type control means to catch the elbow.
Particularly, when 400 series thin materials and BA plates are produced, the phenomenon of flattening for 3-5 times generally exists, the one-time flattening rate is still not high, the flattening process is the bottleneck process of cold rolling, and the bottleneck situation is aggravated by a single plate type control means.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to solve the problems that the edge wave cannot be eliminated by adopting a small-convexity roller for flattening; if the large-convexity roller is adopted to eliminate the edge waves, a large-belly plate is generated along with the middle of the strip steel.
The technical scheme adopted by the invention is as follows: a method for grinding the combined roller shape with flat roller convexity features that multiple combined roller shapes with one convexity at its central part and another one with different convexity at its both ends are used. Crown is a term used in the art to measure the degree of crowning of a flattening roll and is generally expressed in terms of a mm-B passes, where a represents the length of the flattening roll for a single wave change of the flattening roll and B passes represents the maximum crowning value for the single wave change, and 1 pass equals 0.01 mm.
For a 1000mm material (width 1000 mm): the total length of the roller surface is 1400mm, the middle of the roller surface is 900mm-25 times of convexity, and two sides are 250mm-60 times of convexity respectively. The two sides are symmetrical about the middle, the length of the roller surface of a single waveform at the center is 900mm, the center of the roller surface of the single waveform (a first sine waveform) protrudes by 0.25mm relative to the two ends, the change of the first sine waveform adopts smooth transition from the center to the two ends, and the boundary in the single waveform is 0 protrusion. Each edge (250 mm) adopts a single waveform (second sine waveform) different from the middle of the roller surface, wherein the end close to the middle of the roller surface protrudes 0.60mm relative to the edge end of the roller, the second sine waveform changes smoothly and excessively, and the first sine waveform boundary and the second sine waveform boundary are overlapped. The middle of the roll surface adopts sine wave waveform or cosine wave waveform (partial waveform) transformation, and the two sides adopt the other sine wave waveform or cosine wave waveform (partial waveform) transformation.
For 1200mm material (width 1200 mm): the total length of the roller surface is 1400mm, the middle of the roller surface is 1100mm-25 times of convexity, and two sides of the roller surface are 150mm-60 times of convexity. The two sides are symmetrical about the middle, the length of the roller surface of a single waveform at the center is 1100mm, the center of the roller surface of the single waveform (a first sine waveform) protrudes by 0.25mm relative to the two ends, the change of the first sine waveform adopts smooth transition from the center to the two ends, and the boundary in the single waveform is 0 protrusion. Each edge (150 mm) adopts a single waveform (second sine waveform) different from the middle of the roll surface, wherein the end close to the middle of the roll surface protrudes 0.60mm relative to the edge end of the roll, the second sine waveform changes smoothly and excessively, and the first sine waveform boundary and the second sine waveform boundary are overlapped. The middle of the roll surface adopts sine wave waveform or cosine wave waveform (partial waveform) transformation, and the two sides adopt the other sine wave waveform or cosine wave waveform (partial waveform) transformation.
The invention has the beneficial effects that: the double-side waves and the longitudinal stripes are obviously improved, the one-time flattening rate of the machine set is greatly improved, and the folding and printing of the packing paper are correspondingly and greatly reduced after the board shape is improved.
Drawings
FIG. 1 is a schematic illustration of the convexity of the present invention.
Detailed Description
(1) Solves the problem of elbow braking during the control of the defects of edge waves and big belly plates
Adopt the single roller type of convexity (tapering or zheng study single wave form) in the leveling process, there is the problem of dilemma when two kinds of defects of control edge wave and big belly board, we study the combination roller type that adopts different convexities with both sides in the middle of the leveling roller: the middle part does not prevent the big belly plate from adopting small convexity, and the edge part eliminates the edge waves and adopts large convexity. Two defects are pertinently and effectively controlled, and the plate type is improved.
(2) Different width material roller type matching (taking 2# temper mill as an example)
Because the planisher produces steel strips with different width specifications, the following two combined roller types are researched according to the specification of the steel strips:
A. aiming at 1000mm materials: the total length of the roller surface is 1400mm, the middle of the roller surface has 900mm-25 convexity, as shown in figure 1, A2-A3 is the central part and 900mm long, and the center of A2-A3 is 0.25mm higher than the two end points (A2 and A3 are flush); the combined roller type with 250mm-60 convex degrees at two sides respectively, A1-A2 and A3-A4 are two edge sections which are symmetrical, each section is 250mm long, wherein the convex degree of A2 point is 0.60mm higher than that of A1 point, the convex degree of A3 point is 0.60mm higher than that of A4 point, and A1 and A4 are flush.
B. For 1200mm material: the total length of the roller surface is 1400mm, the middle of the roller surface is 1100mm-25 convex degrees, as shown in figure 1, A2-A3 is the central part and is 1100mm long, and the center of A2-A3 is 0.25mm higher than the two end points (A2 and A3 are flush); the combined roller type with 150mm-60 convex degrees at two sides respectively, A1-A2 and A3-A4 are two edge sections which are symmetrical and each section is 150mm long, wherein the convex degree of the A2 point is 0.60mm higher than that of the A1 point, the convex degree of the A3 point is 0.60mm higher than that of the A4 point, and the A1 and the A4 are flush.
The invention provides a method for grinding and flattening the convexity combination roll profile of a roll, which has obvious effect on controlling defects of double-side waves, longitudinal stripes, large-belly plates and the like, greatly improves the one-time flattening rate of a machine set, and correspondingly greatly reduces the pad paper folding marks after the plate type is improved.
According to statistics, the Shanxi Tai Steel stainless steel Limited company produces 378 rolls by using the 2# flattening combined roller type in 2020 and 2 months, wherein 5 rolls have no uneven plate type at one time, and the first pass rate of the flattening plate type is improved to 98.7 percent from 95.4 percent in 2019 and every month.
In addition, the folding marks of the packing paper are correspondingly reduced after the plate shape is improved, 8 rolls in each month in 2019 are reduced to 4 rolls in the current month, the amplitude is reduced by 50%, and only half rolls appear in the half month after the combined roller shape is used.
Claims (3)
1. A method for grinding a combination roller profile of a leveling roller convexity is characterized in that: the roller type with multiple convexity combinations is adopted, wherein the center adopts one convexity, and the two ends adopt the other different convexity.
2. A method of grinding a combination roll profile for a leveler roll crown as set forth in claim 1, wherein: aiming at 1000mm materials: the total length of the roller surface is 1400mm, a combined roller shape with 900mm-25 channels of convexity in the middle of the roller surface and 250mm-60 channels of convexity at two sides is adopted, sine wave waveform or cosine wave waveform transformation is adopted in the middle of the roller surface, and the other sine wave waveform or cosine wave waveform transformation is adopted at two sides.
3. A method of grinding a combination roll profile for a leveler roll crown as set forth in claim 1, wherein: for 1200mm material: the total length of the roller surface is 1400mm, a combined roller shape with 1100mm-25 convexities in the middle of the roller surface and 150mm-60 convexities at two sides is adopted, sine wave waveform or cosine wave waveform transformation is adopted in the middle of the roller surface, and the other sine wave waveform or cosine wave waveform transformation is adopted at two sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010382809.0A CN111546137A (en) | 2020-05-08 | 2020-05-08 | Method for grinding combined roll profile of flatness roll convexity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010382809.0A CN111546137A (en) | 2020-05-08 | 2020-05-08 | Method for grinding combined roll profile of flatness roll convexity |
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| Publication Number | Publication Date |
|---|---|
| CN111546137A true CN111546137A (en) | 2020-08-18 |
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| CN202010382809.0A Pending CN111546137A (en) | 2020-05-08 | 2020-05-08 | Method for grinding combined roll profile of flatness roll convexity |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06170406A (en) * | 1992-11-30 | 1994-06-21 | Sumitomo Metal Ind Ltd | Manufacture of metallic sheet small in edge drop |
| JP2010089121A (en) * | 2008-10-08 | 2010-04-22 | Nippon Steel Corp | Four-high skin pass rolling mill and skin pass rolling method for galvanized steel sheet |
| CN101811142A (en) * | 2009-02-24 | 2010-08-25 | 宝山钢铁股份有限公司 | Rolling control method of high-strength cold rolled steel strip |
| CN101992219A (en) * | 2009-08-21 | 2011-03-30 | 宝山钢铁股份有限公司 | Method for forming variable crown working (VCW) roll shape for strip steel plate shape control |
| CN102247993A (en) * | 2011-05-27 | 2011-11-23 | 马鞍山钢铁股份有限公司 | Method for designing and matching roll shape of continuous annealing temper mill |
| DE102010029598A1 (en) * | 2010-06-01 | 2011-12-01 | ACHENBACH BUSCHHüTTEN GMBH | Back-up roll and thus equipped roll stand |
| JP5803865B2 (en) * | 2012-09-18 | 2015-11-04 | 新日鐵住金株式会社 | Manufacturing method of stainless steel cold-rolled steel strip |
| CN109967529A (en) * | 2019-04-29 | 2019-07-05 | 北京科技大学 | Improve the shape of working roll design method that strip in razor-thin rolls the tight rib wave flatness defect in back |
| CN110153183A (en) * | 2019-04-16 | 2019-08-23 | 邯郸钢铁集团有限责任公司 | A kind of negative convexity plain-barreled roll roll shape of Cold-Rolled Strip Temper Mill working roll |
| CN209379659U (en) * | 2018-09-30 | 2019-09-13 | 日照钢铁控股集团有限公司 | A kind of planisher preventing shape wave among thin gauge hot rolling acid-cleaning formation plate |
| CN209407078U (en) * | 2018-12-11 | 2019-09-20 | 上海燊屿精密设备有限公司 | A kind of positive convexity roll shape structure of two middle idler roller of Sendzimir mill |
| CN110293132A (en) * | 2019-07-04 | 2019-10-01 | 燕山大学 | A kind of multisection type convexity regulation roll with interior cold |
-
2020
- 2020-05-08 CN CN202010382809.0A patent/CN111546137A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06170406A (en) * | 1992-11-30 | 1994-06-21 | Sumitomo Metal Ind Ltd | Manufacture of metallic sheet small in edge drop |
| JP2010089121A (en) * | 2008-10-08 | 2010-04-22 | Nippon Steel Corp | Four-high skin pass rolling mill and skin pass rolling method for galvanized steel sheet |
| CN101811142A (en) * | 2009-02-24 | 2010-08-25 | 宝山钢铁股份有限公司 | Rolling control method of high-strength cold rolled steel strip |
| CN101992219A (en) * | 2009-08-21 | 2011-03-30 | 宝山钢铁股份有限公司 | Method for forming variable crown working (VCW) roll shape for strip steel plate shape control |
| DE102010029598A1 (en) * | 2010-06-01 | 2011-12-01 | ACHENBACH BUSCHHüTTEN GMBH | Back-up roll and thus equipped roll stand |
| CN102247993A (en) * | 2011-05-27 | 2011-11-23 | 马鞍山钢铁股份有限公司 | Method for designing and matching roll shape of continuous annealing temper mill |
| JP5803865B2 (en) * | 2012-09-18 | 2015-11-04 | 新日鐵住金株式会社 | Manufacturing method of stainless steel cold-rolled steel strip |
| CN209379659U (en) * | 2018-09-30 | 2019-09-13 | 日照钢铁控股集团有限公司 | A kind of planisher preventing shape wave among thin gauge hot rolling acid-cleaning formation plate |
| CN209407078U (en) * | 2018-12-11 | 2019-09-20 | 上海燊屿精密设备有限公司 | A kind of positive convexity roll shape structure of two middle idler roller of Sendzimir mill |
| CN110153183A (en) * | 2019-04-16 | 2019-08-23 | 邯郸钢铁集团有限责任公司 | A kind of negative convexity plain-barreled roll roll shape of Cold-Rolled Strip Temper Mill working roll |
| CN109967529A (en) * | 2019-04-29 | 2019-07-05 | 北京科技大学 | Improve the shape of working roll design method that strip in razor-thin rolls the tight rib wave flatness defect in back |
| CN110293132A (en) * | 2019-07-04 | 2019-10-01 | 燕山大学 | A kind of multisection type convexity regulation roll with interior cold |
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Application publication date: 20200818 |
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