CN113909311A - Anti-crack guide roller optimization method - Google Patents
Anti-crack guide roller optimization method Download PDFInfo
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- CN113909311A CN113909311A CN202111098459.6A CN202111098459A CN113909311A CN 113909311 A CN113909311 A CN 113909311A CN 202111098459 A CN202111098459 A CN 202111098459A CN 113909311 A CN113909311 A CN 113909311A
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- guide roller
- working surface
- rolled piece
- guide
- size
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005457 optimization Methods 0.000 title claims abstract description 10
- 238000005452 bending Methods 0.000 claims abstract description 5
- 238000005336 cracking Methods 0.000 claims abstract description 3
- 230000007704 transition Effects 0.000 claims description 19
- 238000005096 rolling process Methods 0.000 abstract description 20
- 238000007373 indentation Methods 0.000 abstract description 6
- 230000002159 abnormal effect Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/14—Guiding, positioning or aligning work
- B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Abstract
The invention relates to an anti-cracking guide roller optimization method, which comprises the following steps of S1: measuring the cheek bend size S2 of the rolled piece in the previous pass: under the condition that the radian of the working surface of the guide roller is not changed, turning inwards along the working surface of the guide roller to enable the cheek bending size (0.9-0.95) to be the size of the working surface of the guide roller wrapped by the rolled piece after improvement; the method for optimizing and improving the guide roller on the basis of the existing guide roller avoids surface cracks formed by the indentation generated on the surface of a rolled piece by the guide roller through subsequent rolling; the abnormal stop replacement is reduced, the surface quality of the product is effectively improved, the subsequent finishing warehousing efficiency is improved, and the guide assembly is prevented from being replaced due to redesign of the guide roller.
Description
Technical Field
The invention relates to a steel rolling guide roller, in particular to an anti-crack guide roller optimization method.
Background
The guide device is a device for supporting rolled pieces to enter a rolling mill for rolling and leading out in the steel rolling production process, and is used for guiding the rolled pieces to enter and exit the pass according to a required state in the section rolling process so as to ensure that the rolled pieces realize established deformation. The design and use of the guide and guard device are proper, and the quality of the product is directly influenced.
The rolling guide and guard device is a guide device for guiding rolled pieces into roll pass of a rolling mill when a steel mill rolls profiles, bars and wires. The guide roller of the rolling guide and guard device is arranged on the guide roller shaft through the bearing, and when a rolled piece passes through the guide roller, the guide roller rotates around the guide roller shaft along with the advancing of the rolled piece, so that the sliding friction between the rolled piece and the guide and guard device is changed into rolling friction, and the abrasion between the guide and guard device and the rolled piece is reduced. The guide roller is the most important wearing part in the rolling guide device, and is frequently replaced and greatly used. With the development of steel rolling technology, the rolling speed of steel products is faster and faster. At present, the finishing speed of a large bar is about 3.5m/s, and because the working conditions of the guide roller are very poor, the large bar needs to bear the continuous impact of a rolled piece, is rubbed with the rolled piece for a long time at high temperature (the temperature of the rolled piece is about 1000 ℃) and high speed, and simultaneously also bears the impact of alternating thermal load (cooling water needs to be applied to the guide roller to reduce the temperature of the guide roller), so the replacement frequency of the roller is very high. As shown in fig. 1, in the prior art, a guide roller is designed by a guide manufacturer at will, often, the working surface of the guide roller only wraps a rolled piece by 80%, and the radius of a transition arc is small, and the guide roller often wraps the working surface of the rolled piece by less working surface and the radius of the transition arc is too small to wear and form an edge angle, so that an indentation is generated on the surface of the rolled piece, and a crack is formed on the surface of the rolled piece after the rolling, thereby causing abnormal platform halt replacement and greatly influencing the post-finishing warehousing period, the increase of the grinding workload and the cost consumption;
in summary, how to prevent the indentation generated on the surface of the rolled piece by the guide roller from forming surface cracks through the subsequent rolling becomes a problem which needs to be solved urgently by researchers in the field.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to prevent the indentation generated on the surface of the rolled piece by the guide roller from forming surface cracks through the subsequent rolling;
in order to solve the technical problems, the invention adopts the following technical scheme:
the invention discloses an anti-cracking guide roller optimization method, which comprises the following steps of S1: measuring the cheek bend size S2 of the rolled piece in the previous pass: under the condition that the radian of the working surface of the guide roller is not changed, turning inwards along the working surface of the guide roller to enable the cheek bending size (0.9-0.95) to be the size of the working surface of the guide roller wrapped by the rolled piece after improvement;
the scheme is a method for optimizing and improving the guide roller on the basis of the existing guide roller, the working surface of the guide roller wraps a rolled piece by 90-95%, the radius of the transition arc is increased, cracks formed by pressing marks generated on the surface of the rolled piece passing through the surface of the subsequent rolling can be effectively restrained, and the edges and corners are reduced.
In order to ensure the self-strength of the guide roller, the distance from the top surface of the working surface of the guide roller to the inner wall of the guide roller in S2 is more than or equal to 25 mm;
the distance from the top surface of the working surface of the guide roller to the inner wall of the guide roller is more than or equal to 25mm, so that the shortest distance from the inner wall of the guide roller mounting hole to the working surface is more than or equal to 25mm, and the strength of the guide roller is guaranteed.
The invention further prevents the generation of edges and corners, and a transition arc is arranged between the end part of the working surface of the guide roller and the side wall of the guide roller; the linear distance from the side wall to the end part of the transition arc is more than or equal to 10 mm; the radius of the transition arc is more than or equal to 30 mm;
compared with the traditional transition arc with the radius of 10mm, the scheme increases the radius of the transition arc, so that the connection between the end part of the working surface and the transition arc is smoother, and the edge angle is reduced; 10mm is reserved on the side wall, the self strength is guaranteed, and deformation of a rolled piece is prevented.
The invention has the beneficial effects that: the invention relates to an anti-crack guide roller optimization method, in particular to a method for optimizing and improving a guide roller on the basis of the existing guide roller, which avoids surface cracks formed by indentation generated on the surface of a rolled piece by the guide roller through subsequent rolling; the abnormal stop replacement is reduced, the surface quality of the product is effectively improved, the subsequent finishing warehousing efficiency is improved, and the guide assembly is prevented from being replaced due to redesign of the guide roller.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a cross-sectional view of a conventional guide roller;
FIG. 2 is a sectional view of the guide roller according to the present embodiment;
in the figure: 1-working surface, 2-inner wall, 3-side wall, 4-transition arc.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 2, the invention is an anti-crack guide roller optimization method, which comprises the following steps of S1: measuring the cheek bend size S2 of the rolled piece in the previous pass: under the condition that the radian of the guide roller working surface 1 is unchanged, inward turning is carried out along the guide roller working surface 1, so that the cheek bending size (0.9-0.95) is equal to the size of the working surface 1 of the guide roller wrapped by the rolled piece after improvement;
the scheme is a method for optimizing and improving the guide roller on the basis of the existing guide roller, the working surface of the guide roller wraps a rolled piece by 90-95%, the radius of the transition arc is increased, cracks formed by pressing marks generated on the surface of the rolled piece passing through the surface of the subsequent rolling can be effectively restrained, and the edges and corners are reduced.
As shown in FIG. 2, in order to ensure the self-strength of the guide roller, the distance a between the top surface of the working surface 1 of the guide roller and the inner wall 2 of the guide roller in S2 is more than or equal to 25 mm;
the distance from the top surface of the working surface of the guide roller to the inner wall of the guide roller is more than or equal to 25mm, so that the shortest distance from the inner wall of the guide roller mounting hole to the working surface is more than or equal to 25mm, and the strength of the guide roller is guaranteed.
As shown in fig. 2, in order to further prevent the generation of edges and corners, the invention adopts the technical scheme that a transition arc 4 is arranged between the end part of the working surface 1 of the guide roller and the side wall 3 of the guide roller; the linear distance from the side wall 3 to the end part of the transition arc 4 is more than or equal to 10 mm; the radius of the transition arc 4 is more than or equal to 30 mm;
compared with the traditional transition arc with the radius of 10mm, the scheme increases the radius of the transition arc, so that the connection between the end part of the working surface and the transition arc is smoother, and the edge angle is reduced; 10mm is reserved on the side wall, the self strength is guaranteed, and deformation of a rolled piece is prevented.
The invention relates to an anti-crack guide roller optimization method, in particular to a method for optimizing and improving a guide roller on the basis of the existing guide roller, which avoids surface cracks formed by indentation generated on the surface of a rolled piece by the guide roller through subsequent rolling; the abnormal stop replacement is reduced, the surface quality of the product is effectively improved, the subsequent finishing warehousing efficiency is improved, and the guide assembly is prevented from being replaced due to redesign of the guide roller.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. An anti-crack guide roller optimization method is characterized by comprising the following steps,
s1: measuring the cheek bending size of the rolled piece of the previous pass;
s2: under the condition that the radian of the working surface of the guide roller is not changed, the guide roller is turned inwards along the working surface of the guide roller, so that the chin bending size (0.9-0.95) is equal to the size of the improved working surface of the rolled piece wrapped by the guide roller.
2. The method for optimizing the guide roller with the crack control as claimed in claim 1, wherein the distance from the top surface of the working surface of the guide roller to the inner wall of the guide roller in S2 is not less than 25 mm.
3. The optimization method of the anti-cracking guide roller as claimed in claim 1, wherein a transition arc is arranged between the end part of the working surface of the guide roller and the side wall of the guide roller;
the linear distance from the side wall to the end part of the transition arc is more than or equal to 10 mm;
the radius of the transition arc is more than or equal to 30 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111098459.6A CN113909311B (en) | 2021-09-18 | 2021-09-18 | Anti-cracking guide roller optimization method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111098459.6A CN113909311B (en) | 2021-09-18 | 2021-09-18 | Anti-cracking guide roller optimization method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113909311A true CN113909311A (en) | 2022-01-11 |
| CN113909311B CN113909311B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111098459.6A Active CN113909311B (en) | 2021-09-18 | 2021-09-18 | Anti-cracking guide roller optimization method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2007132031A (en) * | 2007-08-23 | 2009-02-27 | Открытое акционерное общество "Северсталь" (ОАО "Северсталь") (RU) | ROLLER WIRING |
| CN202606522U (en) * | 2012-06-05 | 2012-12-19 | 新疆八一钢铁股份有限公司 | Tensional guide for round steel bar slit rolling |
| CN103182395A (en) * | 2013-04-12 | 2013-07-03 | 马钢(集团)控股有限公司 | Vertical loop device for high-speed wire rod rolling mill |
| CN209222889U (en) * | 2018-11-16 | 2019-08-09 | 西安盛日机电科技有限公司 | For rolling the wear-resistant material deflector roll and its mating guide and guards of high line |
| CN111014316A (en) * | 2019-12-25 | 2020-04-17 | 新疆八一钢铁股份有限公司 | Phi 13 spring round steel hot upsetting crack control method |
| CN212577172U (en) * | 2020-05-29 | 2021-02-23 | 鞍钢股份有限公司 | Guide roller for round steel rolling mill |
-
2021
- 2021-09-18 CN CN202111098459.6A patent/CN113909311B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2007132031A (en) * | 2007-08-23 | 2009-02-27 | Открытое акционерное общество "Северсталь" (ОАО "Северсталь") (RU) | ROLLER WIRING |
| CN202606522U (en) * | 2012-06-05 | 2012-12-19 | 新疆八一钢铁股份有限公司 | Tensional guide for round steel bar slit rolling |
| CN103182395A (en) * | 2013-04-12 | 2013-07-03 | 马钢(集团)控股有限公司 | Vertical loop device for high-speed wire rod rolling mill |
| CN209222889U (en) * | 2018-11-16 | 2019-08-09 | 西安盛日机电科技有限公司 | For rolling the wear-resistant material deflector roll and its mating guide and guards of high line |
| CN111014316A (en) * | 2019-12-25 | 2020-04-17 | 新疆八一钢铁股份有限公司 | Phi 13 spring round steel hot upsetting crack control method |
| CN212577172U (en) * | 2020-05-29 | 2021-02-23 | 鞍钢股份有限公司 | Guide roller for round steel rolling mill |
Non-Patent Citations (1)
| Title |
|---|
| 肖国伟;: "高线轧机滚动导卫寿命的提高", 天津冶金, no. 03, 15 June 2012 (2012-06-15) * |
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| CN113909311B (en) | 2024-05-28 |
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