CN205551079U - Plate mill backing roll - Google Patents
Plate mill backing roll Download PDFInfo
- Publication number
- CN205551079U CN205551079U CN201620281309.7U CN201620281309U CN205551079U CN 205551079 U CN205551079 U CN 205551079U CN 201620281309 U CN201620281309 U CN 201620281309U CN 205551079 U CN205551079 U CN 205551079U
- Authority
- CN
- China
- Prior art keywords
- backing roll
- roll
- starting point
- circular arc
- straight section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The utility model provides a plate mill backing roll, the curvature radius of backing roll body of roll tip circular arc section chamfer is 73000~78000mm, and the straight section starting point is 0.85~0.95mm to the perpendicular distance of circular arc section starting point to one side, and the straight section starting point is 3.0~3.2mm to the perpendicular distance of circular arc segment endpoint to one side. The utility model discloses can effectively improve the stress of backing roll, prevent tip crackle and plastic deformation phenomenon, solve the backing roll and fallen the meat problem to extension backing roll life cycle makes roughing mill and the life of finishing mill backing roll in a rolling cycle improve more than 1.5 times and 1.25 times than the original design respectively, and very big reduction in production cost stops the quality accident.
Description
Technical field
This utility model belongs to mechanical equipment of steel rolling technical field, particularly relates to a kind of for heavy and medium plate mill
Upper and lower support roller.
Background technology
Medium plate mill CVC goes here and there roller technology, has good plate shape and Crown control level.Milling train upper,
Lower backing roll is all made up of with roller neck two parts the body of roll, and two ends of the body of roll are machined with oblique straight section respectively
With two sections of chamferings of arc section.Find during life-time service, after support roller uses a period of time, its end
Plastic deformation occur, and deformation has certain regularity, i.e. there is tiny splitting in upper backup roll transmission side end
Stricture of vagina, there is fine cracks in lower backing roll fore side end, and the shape of upper and lower support roll end deformation is identical.
Checking and find, its reason is owing to finishing mill working roll uses CVC roll shape, supports roller distribution of force and is
Both sides are big, middle little, in the case of not abrasion, support roll end stress to the reaction with or without chamfering relatively
Little；But after it weares and teares, the stress of end can drastically increase, thus away from upper and lower support roller end surface of roll
Having processing hardening and fatigue crack at 50～100mm, through hardness determination, its hardness improves 6HSD, exists
Potential safety hazard greatly, if this problem can not get solving in time, it is most likely that occurs that supporting the roller body of roll loses flesh
Major accident, directly affect support roller service life.
Summary of the invention
This utility model is intended to improve the stress supporting roller, it is to avoid support the support that roll end crackle causes
Roller loses flesh phenomenon, extends and supports roller and use the cycle, reduces expense expenditure and quality accident.
To this end, the technical solution that this utility model is taked is:
A kind of heavy and medium plate mill supports roller, supports two ends of the roller body of roll and is machined with oblique straight section and arc section respectively
Two sections of chamferings, it is characterised in that the radius of curvature of described support roller body of roll end arc section chamfering be 73000～
78000mm, the vertical dimension of oblique straight section starting point to arc section starting point is 0.85～0.95mm, and oblique straight section starting point arrives
The vertical dimension of arc section terminal is 3.0～3.2mm.
The beneficial effects of the utility model are:
This utility model can be effectively improved support roller stress, lower machine support roller do not find crack on end side and
Obvious plastic deformation phenomenon, it is to avoid support roller loses flesh problem, and its end hardness lift-off value substantially falls after rise,
Measured value is in the range of 52～54HSD, thus extends support roller and use the cycle, makes roughing mill prop up with finishing mill
Support roller ratio original design raising 1.5 times and more than 1.25 times respectively in the service life within a rolling cycle, pole
Decrease greatly production cost, stop quality accident.
Accompanying drawing explanation
Fig. 1 is to support roller partial enlarged drawing.
In figure: tiltedly straight section 1, arc section 2, A is the starting point of oblique straight section 3, and B is the terminal of arc section 4, C
For the starting point of arc section 4, R represents radius of curvature.
Detailed description of the invention
Support roller system to be made up of the roller neck at the body of roll and two ends, be machined with respectively tiltedly in two ends of the body of roll
Straight section 1 and 2 two sections of chamferings of arc section.This utility model one is by support roller body of roll end arc section 2 chamfering
Radius of curvature R be reduced to 75000mm by original 125000mm.Two is to circle by oblique straight section 1 starting point A
The vertical dimension of segmental arc 2 starting point C is increased to 0.9mm by 0.7mm, simultaneously by oblique straight section 1 starting point A to circular arc
The vertical dimension of section 2 terminal B is increased to 3.0mm by 1.5mm, thus improves the stress at body of roll two ends,
Reduce the loading of body of roll end, reduce the processing hardening of body of roll end and the probability of fatigue crack generation.
Claims (1)
1. heavy and medium plate mill supports a roller, supports two ends of the roller body of roll and is machined with oblique straight section and circular arc respectively
Two sections of chamferings of section, it is characterised in that the radius of curvature of described support roller body of roll end arc section chamfering is
73000～78000mm, the vertical dimension of oblique straight section starting point to arc section starting point is 0.85～0.95mm, the most directly
Duan Qidian is 3.0～3.2mm to the vertical dimension of arc section terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620281309.7U CN205551079U (en) | 2016-04-04 | 2016-04-04 | Plate mill backing roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620281309.7U CN205551079U (en) | 2016-04-04 | 2016-04-04 | Plate mill backing roll |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205551079U true CN205551079U (en) | 2016-09-07 |
Family
ID=56810244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620281309.7U Expired - Fee Related CN205551079U (en) | 2016-04-04 | 2016-04-04 | Plate mill backing roll |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205551079U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109551306A (en) * | 2018-11-08 | 2019-04-02 | 宝钢轧辊科技有限责任公司 | HC six-high cluster mill intermediate calender rolls body of roll end-beveling method for grinding |
| CN113547281A (en) * | 2021-07-06 | 2021-10-26 | 山西太钢不锈钢股份有限公司 | Method for repairing surface cracks of leveling roller and performing nondestructive testing |
-
2016
- 2016-04-04 CN CN201620281309.7U patent/CN205551079U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109551306A (en) * | 2018-11-08 | 2019-04-02 | 宝钢轧辊科技有限责任公司 | HC six-high cluster mill intermediate calender rolls body of roll end-beveling method for grinding |
| CN113547281A (en) * | 2021-07-06 | 2021-10-26 | 山西太钢不锈钢股份有限公司 | Method for repairing surface cracks of leveling roller and performing nondestructive testing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160907 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |