CN102554721A - Technology for polishing inner ring of back-up roll bearing of rolling mill - Google Patents
Technology for polishing inner ring of back-up roll bearing of rolling mill Download PDFInfo
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- CN102554721A CN102554721A CN2012100323051A CN201210032305A CN102554721A CN 102554721 A CN102554721 A CN 102554721A CN 2012100323051 A CN2012100323051 A CN 2012100323051A CN 201210032305 A CN201210032305 A CN 201210032305A CN 102554721 A CN102554721 A CN 102554721A
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Abstract
The invention relates to a technology for polishing an inner ring of a back-up roll bearing of a rolling mill. The technical scheme is that: firstly, a center rack is used for lifting; the center rack of a head rack end is used for lifting a main bearing position; a tail rack end is used for lifting a thrust bearing position; the lifting range is from 370mm to 570mm; the horizontal lifting degree of the tail rack end is regulated to be less than or equal to 0.02mm; the roundness is regulated to be less than or equal to 0.02mm; then, automatic tool setting parameters in a grinding machine control system are set according to a grinding starting point; an automatic tool setting command is executed for carrying out tool setting; manual feed is executed for polishing; and grinding quantity is from 0.07mm to 0.1mm. The technology has the advantages of removing hidden danger existing in lifting and grinding a top, enhancing the rigidity and the surface accuracy of the inner ring of the back-up roll bearing of the rolling mill, and satisfying the requirements of technological utilization.
Description
Technical field
The present invention relates to a kind of milling train back-up roll bearing thinning technique, the especially grinding method of back-up roll bearing inner ring, belong to technical field of metallurgical machinery.
Background technology
At present; The metallurgy industry inner rings of rolling-mill bearings in use can with the rolling element generation rolling friction of bearing; If be late for bearing inner race is carried out reconditioning, the bearing inner race wearing and tearing can be quite serious, mainly shows aspects such as surface pitting, hardness inequality, circularity axiality difference.As the bearing inner race continuation use that will not reach technological requirement, will directly cause scrapping in advance of a whole set of bearing, and the unit price of bearing has increased production cost all above 200,000/cover.
Milling train back-up roll bearing inner ring maintenance in use all is mounted in to be carried out on the roll; Because carrying out roll dressing at ordinary times all is to drag the act grinding by Tuo Wa; Then also there have been wearing and tearing in various degree in the centre bore at two ends, so the concentricity of roll centre bore has also had very large error.Reconditioning milling train back-up roll bearing inner ring generally all is to adopt the top two ends centre bore that holds out against to carry out reconditioning; Mainly there is following shortcoming in the method: (1) backing roll is very heavy; Generally all surpass 6 tons, lean on top top, two ends to lift roll and carry out reconditioning, stability is hanged down and is had bigger potential safety hazard.(2) very poor of milling train back-up roll bearing inner ring rigidity that reconditioning comes out lifted on top top.(3) because the centre bore concentricity at two ends causes the surface accuracy of the milling train back-up roll bearing inner ring that reconditioning comes out can't reach the instructions for use of reaching the standard grade more greatly.
Summary of the invention
The purpose of this invention is to provide
OnePlant milling train back-up roll bearing inner ring thinning technique, the mode that adopts centre frame to lift, the grinding of milling train back-up roll bearing inner ring is accomplished in manually feed, solves the problems referred to above of background technology existence.
Technical scheme of the present invention is:
OnePlant milling train back-up roll bearing inner ring thinning technique, at first utilize centre frame to lift, headstock end centre frame is lifted the base bearing position, and the tailstock end is lifted the thrust bearing position, lifts scope 370-570mm; Adjustment tailstock end holder watt levelness≤0.02mm, circularity≤0.02mm is provided with the automatic tool preset parameter in the Development of Grinding Machines'Control System according to the grinding starting point then, and carries out automatic tool preset order carrying out tool setting, and manually reconditioning is carried out in feed, and stock removal is 0.07-0.1mm.
Good effect of the present invention is: eliminated the potential safety hazard of lifting the grinding existence in top top, rigidity and the surface accuracy that has improved milling train back-up roll bearing inner ring, satisfied the requirement that technology is used, realized that repeatedly grinding prolongs the bearing inner race purpose in service life.
Description of drawings
Fig. 1 milling train back-up roll bearing inner ring holder mill back case hardness curve map;
Fig. 2 milling train back-up roll bearing inner ring holder mill back surface roughness curve map.
The specific embodiment
Through embodiment the present invention is further specified below.
Utilize CNC roll grinder that cold rolling four tandem rolling mills, planisher, single chassis back-up roll bearing inner ring are carried out reconditioning; At first the centre frame place is arrived in the roll handling; The top centre bore that withstands in frame two ends end to end, headstock end is lifted roll bearing position tailstock end with centre frame and is lifted the thrust bearing position.The centre frame holder watt holds out against lifts that to unclamp tail end behind the position top, and dial gauge is fixed on the grinding carriage; Adjustment tailstock holder is watt with adjustment levelness≤0.02mm, circularity≤0.02mm.To ask tilt sickness to reduce 20mm, and make the scope of lifting be controlled at 370-570mm; According to the grinding starting point automatic tool preset parameter in the Development of Grinding Machines'Control System is set then, and carries out the automatic tool preset order and carry out tool setting, guarantee the tool setting precision; Manually reconditioning is carried out in feed, goes top reconditioning quality general grinding amount at 0.07-0.1mm according to the bearing inner race situation; Grinding finishes and is coated with oil guard.Back surface quality testing result is following for cold rolling four tandem rolling mills, planisher, single chassis back-up roll bearing inner ring holder mill:
Cold rolling four tandem rolling mills, planisher, single chassis back-up roll bearing inner ring holder mill back surface quality
| Roller number | External diameter before the mill | Mill back external diameter | Hardness (HRC) | Roughness (μ m) |
| YZB025 | 567.61 | 567.53 | 61.2 | 0.23 |
| YZB025 | 567.62 | 567.52 | 62.1 | 0.31 |
| YZB028 | 567.54 | 567.48 | 60.2 | 0.26 |
| YZB028 | 567.51 | 567.46 | 61.5 | 0.27 |
| Q7802 | 567.63 | 568.53 | 61.6 | 0.31 |
| Q7802 | 567.69 | 567.56 | 60.8 | 0.25 |
| YZB014 | 567.67 | 567.57 | 62.0 | 0.34 |
| YZB014 | 567.64 | 567.54 | 62.4 | 0.27 |
| YZB029 | 566.51 | 568.46 | 62.3 | 0.28 |
| YZB029 | 567.57 | 568.47 | 62.9 | 0.20 |
| CR06-07 | 567.56 | 567.49 | 62.8 | 0.38 |
| CR06-07 | 567.59 | 567.48 | 62.9 | 0.29 |
| YZB016 | 567.63 | 568.53 | 62.2 | 0.27 |
| YZB016 | 567.61 | 568.51 | 62.3 | 0.25 |
| CR0706 | 567.52 | 567.46 | 62.3 | 0.24 |
| CR0706 | 567.51 | 567.45 | 61.8 | 0.34 |
| CR07-03 | 568.62 | 568.52 | 62.4 | 0.34 |
| CR07-03 | 568.62 | 568.53 | 62.1 | 0.31 |
| CR06-05 | 567.52 | 567.43 | 59.4 | 0.57 |
| CR06-05 | 567.58 | 567.46 | 59.8 | 0.64 |
Milling train back-up roll bearing inner ring holder mill back case hardness curve is seen accompanying drawing 1;
Milling train back-up roll bearing inner ring holder mill back surface roughness curve is seen accompanying drawing 2;
Visible by last table and accompanying drawing, hardness (HRC) is between 60-63; Roughness (μ m) meets the technology instructions for use fully between 0.2-0.4.
Claims (1)
1.
OnePlant milling train back-up roll bearing inner ring thinning technique, it is characterized in that at first utilizing centre frame to lift, headstock end centre frame is lifted the base bearing position, and the tailstock end is lifted the thrust bearing position, lifts scope 370-570mm; Adjustment tailstock end holder watt levelness≤0.02mm, circularity≤0.02mm is provided with the automatic tool preset parameter in the Development of Grinding Machines'Control System according to the grinding starting point then, and carries out automatic tool preset order carrying out tool setting, and manually reconditioning is carried out in feed, and stock removal is 0.07-0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100323051A CN102554721A (en) | 2012-02-14 | 2012-02-14 | Technology for polishing inner ring of back-up roll bearing of rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100323051A CN102554721A (en) | 2012-02-14 | 2012-02-14 | Technology for polishing inner ring of back-up roll bearing of rolling mill |
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| CN102554721A true CN102554721A (en) | 2012-07-11 |
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| CN2012100323051A Pending CN102554721A (en) | 2012-02-14 | 2012-02-14 | Technology for polishing inner ring of back-up roll bearing of rolling mill |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105729257A (en) * | 2014-12-10 | 2016-07-06 | 上海宝钢工业技术服务有限公司 | Roundness tolerance repairing method for roller shoulder rings of finish-rolled work roller |
| CN110757265A (en) * | 2019-11-06 | 2020-02-07 | 新余钢铁股份有限公司 | Grinding method for bearing inner sleeve of acid rolling support roller |
| CN115008261A (en) * | 2022-06-07 | 2022-09-06 | 首钢京唐钢铁联合有限责任公司 | Repairing method for roller shoulder dragging |
Citations (8)
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| JP2731055B2 (en) * | 1991-09-30 | 1998-03-25 | 株式会社クボタ | Support roller processing equipment |
| US20050208878A1 (en) * | 2004-03-16 | 2005-09-22 | Waldrich Siegen Werkzeugmaschinen Gmbh | Method of and machine for grinding a roll |
| CN101856796A (en) * | 2009-04-08 | 2010-10-13 | 昆山华辰重机有限公司 | Full-automatic digital control roll grinder belt box working roller turning and auxiliary supporting system |
| CN101856795A (en) * | 2009-04-08 | 2010-10-13 | 昆山华辰机器制造有限公司 | Full-automatic digital control roll grinder backup roll belt box grinding device |
| CN201645291U (en) * | 2010-03-25 | 2010-11-24 | 浙江工业大学 | Repairing and grinding machine tool of large-scale rolling bearing channel |
| CN102049711A (en) * | 2009-10-27 | 2011-05-11 | 鞍钢重型机械有限责任公司 | Method for grinding large-weight mill roll by holding of static pressure bracket |
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| CN102275104A (en) * | 2010-06-08 | 2011-12-14 | 昆山华辰机器制造有限公司 | Static pressure central frame of heavy-duty mill roll |
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2012
- 2012-02-14 CN CN2012100323051A patent/CN102554721A/en active Pending
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|---|---|---|---|---|
| JP2731055B2 (en) * | 1991-09-30 | 1998-03-25 | 株式会社クボタ | Support roller processing equipment |
| US20050208878A1 (en) * | 2004-03-16 | 2005-09-22 | Waldrich Siegen Werkzeugmaschinen Gmbh | Method of and machine for grinding a roll |
| CN101856796A (en) * | 2009-04-08 | 2010-10-13 | 昆山华辰重机有限公司 | Full-automatic digital control roll grinder belt box working roller turning and auxiliary supporting system |
| CN101856795A (en) * | 2009-04-08 | 2010-10-13 | 昆山华辰机器制造有限公司 | Full-automatic digital control roll grinder backup roll belt box grinding device |
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| CN102275104A (en) * | 2010-06-08 | 2011-12-14 | 昆山华辰机器制造有限公司 | Static pressure central frame of heavy-duty mill roll |
| CN102248466A (en) * | 2011-07-21 | 2011-11-23 | 中冶陕压重工设备有限公司 | Method for processing Sendzimir roll wobbler slot |
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| 王宪武: "支承辊轴承内环的磨削加工", 《中国重型装备》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105729257A (en) * | 2014-12-10 | 2016-07-06 | 上海宝钢工业技术服务有限公司 | Roundness tolerance repairing method for roller shoulder rings of finish-rolled work roller |
| CN110757265A (en) * | 2019-11-06 | 2020-02-07 | 新余钢铁股份有限公司 | Grinding method for bearing inner sleeve of acid rolling support roller |
| CN115008261A (en) * | 2022-06-07 | 2022-09-06 | 首钢京唐钢铁联合有限责任公司 | Repairing method for roller shoulder dragging |
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Application publication date: 20120711 |