CN112476070A - Grinding method for changing right angle of end part of roller into arc chamfer - Google Patents
Grinding method for changing right angle of end part of roller into arc chamfer Download PDFInfo
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- CN112476070A CN112476070A CN202011388832.7A CN202011388832A CN112476070A CN 112476070 A CN112476070 A CN 112476070A CN 202011388832 A CN202011388832 A CN 202011388832A CN 112476070 A CN112476070 A CN 112476070A
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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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- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The invention discloses a grinding method for changing a right angle of a roller end into an arc chamfer, which relates to the technical field of roller processing, and the method uses a numerical control grinding machine to grind the roller end for multiple times, gradually reduces the chamfer radius set by each grinding in the grinding processing process, and keeps the chamfer width set by each grinding to be the chamfer width of a target arc chamfer until the required arc chamfer is ground; the grinding current in the whole grinding process is controlled below 43A. The invention solves the problem that the existing arc chamfer with larger grinding chamfer fall depth at the end part of the roller is easy to generate grinding burn.
Description
Technical Field
The invention relates to the technical field of roller processing, in particular to a grinding method for changing a right angle of an end part of a roller into an arc chamfer.
Background
The shape of a rolled piece in strip rolling is mainly controlled by modes of working roll bending, intermediate roll bending, roll shifting and the like, and the bending roll bends a roll body of a roll through mechanical force to control the roll gap shape of the roll, so that the shape is controlled, and higher requirements are provided for the comprehensive performance of the roll. The end part of the roller is peeled off due to the larger bearing contact stress of the edge part of the roller in the rolling process, and the sharp part of the end surface of the roller has the possibility of scratching other rollers in the roller shifting process, so that the roller is scrapped in advance due to rolling accidents. In order to improve the situation, the right angle of the end part of the roller is generally changed into an arc chamfer by a grinding mode, the existing roller arc chamfer is mostly a small-curvature arc surface with small chamfer drop, and the small-curvature arc chamfer is difficult to effectively reduce the contact pressure between the rollers; however, when the end portions of the rolls are chamfered and ground into a large-curvature arc surface, problems such as grinding burn are likely to occur, and the grinding burn of the rolls has a large influence on the service life of the rolls and the quality of rolled products.
Disclosure of Invention
The invention aims to provide a grinding method for changing a right angle of the end part of a roller into an arc chamfer, which can solve the problem that the existing arc chamfer with larger drop depth of the grinding chamfer at the end part of the roller is easy to generate grinding burn.
In order to solve the problems, the invention adopts the technical scheme that: the grinding method for changing the right angle of the end part of the roller into the circular arc chamfer uses a numerical control grinding machine to grind the end part of the roller for multiple times, gradually reduces the chamfer radius set by each grinding in the grinding process, and keeps the chamfer width set by each grinding to be the chamfer width of the target circular arc chamfer until the required circular arc chamfer is ground; the grinding current in the whole grinding process is controlled below 43A.
In the above technical solution of the grinding method for changing the right angle of the end of the roller into the circular arc chamfer, the more specific technical solution may also be: the chamfer radius Robj of the target arc chamfer is 1000 mm-5000 mm, and the chamfer width is 50 mm-120 mm.
Further, the chamfer radius of the target arc chamfer is 1000mm, and the chamfer width is 50 mm.
Further, the method specifically comprises the following steps:
A. setting an initial grinding curve as a chamfer radius R1 and a chamfer width B, wherein the chamfer width B is the required chamfer width of the target arc chamfer, and grinding by a grinding machine according to the set curve;
B. setting the curve as a chamfer radius Ri +1 and a chamfer width B, wherein Ri +1= Ri-r, r is an adjusting parameter, the range of r is 1500mm ≦ 3000mm, i =1, 2 and … … n, and the grinding machine continues to grind according to the set curve;
C. and D, repeating the step B, and sequentially reducing the grinding radius until the required circular arc chamfer is obtained through grinding.
Further, the chamfer radius R1 in step a is 10000 mm.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the grinding mode that the radius of the arc of the chamfer is gradually decreased is adopted, the grinding current of the numerical control grinding machine is controlled to be below 43A, the production of grinding burn can be avoided, the grinding quality of changing the right angle of the end part of the roller into the arc chamfer is improved, the grinding cost is reduced, and the period is short.
2. The parameter range of the target arc chamfer is limited, the contact pressure of the roller can be optimized, the service life of the roller is prolonged, and the occurrence rate of rolling accidents is reduced.
3. Limiting the adjustment parameter of the reduction of the grinding radius to 1500-3000 mm, so that the chamfer fall depth formed by single grinding can be effectively controlled, and the excessive grinding current caused by the excessive chamfer fall depth during grinding is avoided, so that the grinding current is ensured to be below 43A, and grinding burn is prevented; but also can reduce the grinding times as much as possible and improve the processing efficiency.
Drawings
FIG. 1 is a schematic view of the roll end radius chamfer.
Detailed Description
The invention will be further described in detail with reference to the following examples:
in the circular arc chamfer of the end part of the roller shown in FIG. 1, R is the chamfer radius, B is the chamfer width, and h is the chamfer fall. The grinding method for changing the right angle of the end part of the roller into the circular arc chamfer is characterized in that the end part of the roller is ground for multiple times by using a numerical control grinding machine, the chamfer radius set by each grinding is gradually reduced in the grinding process, and the chamfer width set by each grinding is kept to be the chamfer width of the target circular arc chamfer until the required circular arc chamfer is ground; the grinding current in the whole grinding process is controlled below 43A. The optimal target arc chamfer of the end part of the roller is that the chamfer radius R is 1000-5000 mm, and the chamfer width B is 50-120 mm.
Example 1
The chamfer radius of the target arc chamfer of the embodiment is 1000mm, the chamfer width is 50mm, and the chamfer grinding method is as follows:
A. setting an initial grinding curve as a chamfer radius of 10000mm and a chamfer width of 50mm, and grinding by a grinding machine according to the set curve;
B. after the previous grinding is finished, positioning the grinding curve as 8000mm of chamfer radius and 50mm of chamfer width, and continuously grinding by a grinding machine according to the set curve;
C. after the previous grinding is finished, positioning the grinding curve as the chamfer radius of 5000mm and the chamfer width of 50mm, and continuously grinding by a grinding machine according to the set curve;
D. after the previous grinding is finished, positioning the grinding curve as the chamfer radius of 2500mm and the chamfer width of 50mm, and continuously grinding by a grinding machine according to the set curve;
E. and after the previous grinding is finished, positioning the grinding curve as the chamfer radius of 1000mm and the chamfer width of 50mm, continuously grinding by the grinding machine according to the set curve, and obtaining the required arc chamfer after the grinding is finished.
The grinding current of the above steps does not exceed 43A in the whole grinding process.
In the embodiment, the fall of the chamfer of the roller is large, the slope of the arc chamfer at the end part of the size is large, the grinding times are multiple, and the grinding time is relatively long.
Example 2
The chamfer radius of the target arc chamfer of the embodiment is 3000mm, the chamfer width is 80mm, and the chamfer grinding method is as follows:
A. setting an initial grinding curve as a chamfer radius of 10000mm and a chamfer width of 80mm, and grinding by a grinding machine according to the set curve;
B. after the previous grinding is finished, positioning the grinding curve as 8000mm of chamfer radius and 80mm of chamfer width, and continuously grinding by a grinding machine according to the set curve;
C. after the previous grinding is finished, positioning the grinding curve as the chamfer radius of 5000mm and the chamfer width of 80mm, and continuously grinding by a grinding machine according to the set curve;
D. and after the previous grinding is finished, positioning the grinding curve as the chamfer radius of 3000mm and the chamfer width of 80mm, continuously grinding by the grinding machine according to the set curve, and obtaining the required arc chamfer after the grinding is finished.
The grinding current of the above steps does not exceed 43A in the whole grinding process.
In the embodiment, the fall of the chamfer of the roller is small, the slope of the arc chamfer at the end part of the size is moderate, the grinding times are relatively reduced, and the grinding time is relatively shortened.
Example 3
The chamfer radius of the target arc chamfer of the embodiment is 5000mm, the chamfer width is 120mm, and the chamfer grinding method is as follows:
A. setting an initial grinding curve as a chamfer radius of 10000mm and a chamfer width of 120mm, and grinding by a grinding machine according to the set curve;
B. after the previous grinding is finished, positioning the grinding curve as 8000mm of chamfer radius and 120mm of chamfer width, and continuously grinding by a grinding machine according to the set curve;
C. and after the previous grinding is finished, positioning the grinding curve as the radius of the chamfer of 5000mm and the width of the chamfer of 120mm, continuously grinding by the grinding machine according to the set curve, and obtaining the required arc chamfer after the grinding is finished.
The grinding current of the above steps does not exceed 43A in the whole grinding process.
In the embodiment, the fall of the chamfer of the roller is small, the slope of the arc chamfer at the end part of the size is small, the grinding times are relatively reduced, and the grinding time is relatively shortened.
The embodiment is not a limitation to the invention, and when a person skilled in the art wants to obtain a target circular arc chamfer, after setting an initial chamfer radius and a chamfer width, the chamfer fall depth of single grinding can be reduced as long as the reduction value of the chamfer radius of each grinding progressively reduced grinding is within 1500 mm-3000 mm, and the problems of excessive grinding current and grinding burn caused by excessive chamfer fall depth during roller chamfer grinding are avoided.
Claims (5)
1. A grinding method for changing a right angle of a roller end part into a circular arc chamfer is characterized in that: grinding the end part of the roller for multiple times by using a numerical control grinding machine, gradually reducing the chamfer radius set by each grinding in the grinding process, and keeping the chamfer width set by each grinding to be the chamfer width of the target arc chamfer until the required arc chamfer is ground; the grinding current in the whole grinding process is controlled below 43A.
2. The grinding method for changing the right angle of the end part of the roller into the circular arc chamfer according to claim 1, which is characterized in that: chamfer radius R of target arc chamferobj1000 mm-5000 mm, 50 mm-120 mm chamfer width.
3. The grinding method for changing the right angle of the end part of the roller into the circular arc chamfer according to claim 2, characterized in that: the chamfer radius of the target arc chamfer is 1000mm, and the chamfer width is 50 mm.
4. The grinding method of the right angle and arc-changing chamfer of the end part of the roller according to any one of the claims 1 to 3, characterized by comprising the following steps:
A. setting the initial grinding curve as a chamfer radius R1The chamfering width B is the required chamfering width of the target arc chamfering, and a grinding machine grinds according to a set curve;
B. the curve is set to the chamfer radius Ri+1Chamfer widths B, Ri+1=RiR, r is an adjustment parameter, the range of which is 1500mm ≦ r ≦ 3000mm, i =1, 2, … … n, and the grinding machine continues to grind according to the set curve;
C. and D, repeating the step B, and sequentially reducing the grinding radius until the required circular arc chamfer is obtained through grinding.
5. The grinding method of the right angle-to-arc chamfer of the end part of the roller according to claim 4, characterized in that: chamfer radius R in step A1Is 10000 mm.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000127013A (en) * | 1998-10-21 | 2000-05-09 | Uchiyama Konpo Shizai Shiki:Kk | Chamfering equipment |
| CN201157844Y (en) * | 2008-01-25 | 2008-12-03 | 广州珠江钢铁有限责任公司 | Backing roll |
| CN103084957A (en) * | 2011-11-08 | 2013-05-08 | 日本微涂料株式会社 | Sheet glass, manufacturing method therefor, method and apparatus for polishing end edge portion of sheet glass |
| CN103203370A (en) * | 2012-01-12 | 2013-07-17 | 宝山钢铁股份有限公司 | Edge wave control method aiming at high-strength steel and work rollers thereof |
| CN103357733A (en) * | 2013-07-15 | 2013-10-23 | 天津市津兆机电开发有限公司 | Method for manufacturing rectangular oil hole of automobile oil filter |
| CN108177044A (en) * | 2017-12-22 | 2018-06-19 | 重庆超硅半导体有限公司 | A kind of integrated circuit monocrystalline silicon piece edge chamfer technology |
| 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 |
| CN110193759A (en) * | 2019-05-13 | 2019-09-03 | 本钢板材股份有限公司 | A kind of high-precision cold roll grinding control method |
| CN111360590A (en) * | 2020-04-23 | 2020-07-03 | 桂林福达曲轴有限公司 | Method for removing grinding burrs on crankshaft journal edge and shoulder surface |
-
2020
- 2020-12-02 CN CN202011388832.7A patent/CN112476070B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000127013A (en) * | 1998-10-21 | 2000-05-09 | Uchiyama Konpo Shizai Shiki:Kk | Chamfering equipment |
| CN201157844Y (en) * | 2008-01-25 | 2008-12-03 | 广州珠江钢铁有限责任公司 | Backing roll |
| CN103084957A (en) * | 2011-11-08 | 2013-05-08 | 日本微涂料株式会社 | Sheet glass, manufacturing method therefor, method and apparatus for polishing end edge portion of sheet glass |
| CN103203370A (en) * | 2012-01-12 | 2013-07-17 | 宝山钢铁股份有限公司 | Edge wave control method aiming at high-strength steel and work rollers thereof |
| CN103357733A (en) * | 2013-07-15 | 2013-10-23 | 天津市津兆机电开发有限公司 | Method for manufacturing rectangular oil hole of automobile oil filter |
| CN108177044A (en) * | 2017-12-22 | 2018-06-19 | 重庆超硅半导体有限公司 | A kind of integrated circuit monocrystalline silicon piece edge chamfer technology |
| 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 |
| CN110193759A (en) * | 2019-05-13 | 2019-09-03 | 本钢板材股份有限公司 | A kind of high-precision cold roll grinding control method |
| CN111360590A (en) * | 2020-04-23 | 2020-07-03 | 桂林福达曲轴有限公司 | Method for removing grinding burrs on crankshaft journal edge and shoulder surface |
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