CN102728620A - Transposition assembling method for bearing of rolling mill - Google Patents
Transposition assembling method for bearing of rolling mill Download PDFInfo
- Publication number
- CN102728620A CN102728620A CN2012102000261A CN201210200026A CN102728620A CN 102728620 A CN102728620 A CN 102728620A CN 2012102000261 A CN2012102000261 A CN 2012102000261A CN 201210200026 A CN201210200026 A CN 201210200026A CN 102728620 A CN102728620 A CN 102728620A
- Authority
- CN
- China
- Prior art keywords
- bearing
- assembling
- outside
- transposition
- time
- 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.)
- Pending
Links
Images
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
The invention relates to a transposition assembling method for a bearing of a rolling mill with a short stress and belongs to the technical field of machinery. The transposition assembling method comprises the following steps of: before a bearing jacket is subjected to pitting corrosion or micro-crack, preventing the generation and expansion of the pitting corrosion or micro-crack by changing a stress point of the bearing jacket; taking an exchange period of the bearing as an experience life value L and tracking each bearing; making a mark on each bearing base and making four signs on each bearing jacket; during an assembling process, aligning one sign on the bearing jacket with the mark on the bearing base; after the use time of the bearing is most approximate to L/2 and is integral times of the exchange period, assembling the bearing jacket again; aligning another sign with the mark on the bearing base; after using for a same period of time, assembling again; and by parity of reasoning, achieving a first period till the four signs are used up. The use method of each period is identical and the use time is reduced by one half of the last period. After the transposition assembling method provided by the invention is adopted, the service life of the bearing is increased by above 3.2 times.
Description
One, affiliated technical field:
Belong to field of mechanical technique, relate to rolling mill bearing.
Two, background technology:
In the milling train of wire rod, production line of bar, extensively adopt roll bearing assembling form as shown in Figure 1, wherein four-line column roller bearing mainly bears the radial load that produces when rolling, and single-row radial ball bearing then mainly bears the axial load that produces when rolling.Because the work under bad environment (high temperature, dust, water etc.) of rolling mill bearing; Stressing conditions very poor (huge roll-force and frequent shock loading), lubricating condition bad (being coated with oil lubrication, poor sealing) etc. cause reduce the service life of rolling mill bearing; Particularly expensive four-line column roller bearing; Frequent bearing upgrades to enterprise has increased huge production cost, therefore, becomes a big problem of enterprise's cost efficiency the service life of how to improve four-line column roller bearing.
Aborning, the interior cover of four row roller bearings is pre-assembled on the roll neck of roll, and the roller of four row bearing, overcoat and single-row ball-bearing then are loaded into bearing block, and the two is assembled in one and plays the production line use during assembling milling train.Because the wearing and tearing of roll pass; Roll in use for some time or will change when changing rolling kind; At this moment the interior cover of bearing will be admitted to roll and carry out the pass loaded vehicle between technology, and bearing outside etc. will cooperate the use of reaching the standard grade after ressembling with other roll, before ressembling, will check bearing; As pinpoint the problems, then need bearing is changed.This process will repeatedly be repeated up to bearing failure.
Cause the reason of bearing failure a lot, in production reality, add up through the failure cause to the four row roller bearings that are replaced, the result sees the following form:
| Failure site | Failure cause | Quantity | Quantity percentage |
| Bearing outside | Spot corrosion is serious, damaged, wearing and tearing | 38 | 63.3% |
| Roller | Come off, fracture, spot corrosion, wearing and tearing | 8 | 13.3% |
| Retainer | Fracture, serious wear | 12 | 20% |
| All | Bearing accident (burn bearing) | 2 | 3.4% |
Visible by last table, the main cause that causes bearing failure is exactly the inefficacy of bearing outside, and failure site focuses mostly on they the most concentrated stressed top.
Because bearing outside position after assembling is fixed, therefore, always cyclic loading is born in certain fixing position when rolling; After after a while; This position engenders that contact fatigue produces spot corrosion, makes contact conditions more abominable, impels the development of spot corrosion rapider; And then cause overcoat to crack, cause the bearing accident when serious.Perhaps,, before not producing spot corrosion, just produced small crackle, and then development has caused breaking of overcoat because this position has received unusual shock loading.
Three, summary of the invention
The objective of the invention is to disclose and a kind ofly can prolong the rolling mill bearing bearing transposition assembling method in service life.
Technical solution of the present invention is: certain time before bearing outside produces spot corrosion or fine fisssure; Through changing the stress point of bearing outside; Reduce or reduce the role and influence of fatigue stress, stop the generation and the development of spot corrosion and fine fisssure, improve the service life of rolling mill bearing; Reduce the bearing accident, reduce production costs.
Technical scheme of the present invention is achieved in that
With replacement cycle of rolling mill bearing under traditional method for using as experience life value L; Set up the use archives of bearing; Bearing and bearing block to each rolling-mill housing carry out label respectively; Write down replacing date, the on-line time of each bearing, the time of rolling off the production line, transposition assembling situation, clean inspection situation, abnormal conditions, simultaneously each bearing is followed the tracks of respectively; Before the assembling, outside each bearing block, respectively make a radially scale marking on the side plane, evenly making four scales or punctuate and marking different marks respectively with the outer side plane upper edge peripheral intervals of supporting each bearing outside of each bearing block; When assembling first, the scale marking on one in four calibrations demarcating on certain bearing outside bearing block with its assembling is alignd, carry out record; When service time of this bearing near L/2 and after being the integral multiple of roll replacement cycle; The bearing taking-up is assembled again; With aliging with the scale marking on the bearing block with symmetrical another calibration of calibration of record last time on the bearing outside, carry out record during assembling; Continue to use the time of using with first mark identical after; Ressemble after again bearing being taken out; The 3rd calibration that the calibration that uses with first record on the bearing outside is adjacent aligns with the scale marking on the bearing block during current assembling, carries out record; By that analogy, four scales or the punctuate mark on bearing outside, demarcated are finished using, and this process is called first and recycles the cycle.
Set up the regular cleaning inspection system of rolling mill bearing; After four calibrations demarcating on the bearing outside are finished using, thoroughly clean and each position of scrutiny bearing bearing, like no abnormal situation; Then bearing is reset; Mid point between certain adjacent two calibration on the bearing outside is alignd with the scale marking on the bearing block, carry out record, with shortening to the integral multiple that is equivalent to time roll replacement cycle its service time and near L/4.Then, bearing taken out assembles again, during assembling will and bearing outside on mid point between relative two calibrations in addition of this mid point of having write down align with the scale marking on the bearing block, carry out record; After continuing to have used the service time identical with above-mentioned mid point; Again bearing is taken out and ressemble; During current assembling the mid point between other adjacent with used mid point on the bearing outside two calibrations is alignd with the scale marking on the bearing block, carry out record; By that analogy, finish using up to each adjacent two scale on the bearing outside or four mid points between the punctuate mark, this process is called second and recycles the cycle; Repeat above-mentioned bearing transposition assembling method; This time selected each point be four calibrations respectively and the centre position between four mid points; Shorten to the service time of a position in these eight centre positions near L/8 and be the integral multiple of roll replacement cycle, finishing using in each centre position, is called the 3rd to recycle the cycle; And the like, till bearing failure.
After this invention applied to produce reality; Because bearing outside situation about losing efficacy in advance obviously reduces,, have 60% to lose efficacy in advance by bearing outside and to cause by the analysis of causes of bearing failure; Calculate with this; If bearing improves 60% average life, after adopting new assembling method, the experience life value of bearing has improved 3.2 times.Can be 91.5 ten thousand yuan of this enterprise wound economic benefits every year, indirect benefit is more remarkable, and the present invention has bigger application and popularization value.
Four, description of drawings
Fig. 1 is the rigging position sketch map of bearing;
Fig. 2 is the position view of four calibrations on bearing block reference point and the bearing outside; Wherein A is a bearing block; B is a bearing outside;
1-roll, 2-bearing block, 3-four row roller bearings, 4-single-row ball-bearing, 5-locknut, 6-bearing outside, 7-bearing inner sleeve among the figure.
Five, the specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
Embodiment 1
To roll implementation procedure and the effect that four lower roll stiff end bearing blocks 2 are this assembling method of example explanation in the bar.
The experience life value L that draws these frame four row roller bearings 3 according in the past statistics is 450 hours, and the replacement cycle of this breast roller 1 is 72 hours.Then, a point such as C are demarcated as reference point in this bearing block 2 lateral surface tops, peripheral intervals demarcates at four o'clock equably as 1,2,3,4 in the outside, overcoat 6 upper edges of this bearing again, wherein 1 with 2 relatively, 3 with 4 relatively, as shown in Figure 2.
Just during dress, with one o'clock in four points demarcating on the bearing outside 6 as 1 with bearing block 2 on the reference point C point of demarcation align, carry out record.
Having used 1/2 of its experience life value L at bearing 3 is 225 hours; Get near 225 hours and be that the integral multiple of 1 replacement cycle of roll is after promptly 72 * 3=216 hour; Bearing 3 is taken out; Again assemble, during assembling with on the bearing outside 6 with 1 relative 2 with bearing block 2 on the C point align, carry out record.
After using 216 hours, assemble again again, when assembling specifically with on the bearing outside 6 with 1 adjacent three o'clock as 3 o'clock with bearing block on the C point align, carry out record; And the like, repeating aforesaid operations, four points 1,2,3,4 of demarcating on bearing outside 6 exhaust, and first recycles end cycle, amounts to 216 * 4=864 hour service time.
Set up bearing and regularly clean inspection system.At this moment and do not mean that bearing 3 lost efficacy 1,2,3,4 four point on bearing outside 6 is finished using, and uses altogether 864 hours,, through it is cleaned inspection, finds that bearing 3 is all right, and decision continues to use.So bearing 3 is reset, be specifically with aliging like that C point of demarcating on the mid point between 1,3 and the bearing block in every adjacent two o'clock on the bearing outside 6, carrying out record.And with shortening to service time of each mid point, and be the roll integral multiple of 1 replacement cycle near L/4.
After the second use cycle period begins; Getting 1/4 of its experience life value L is 112.5 hours reference points service time as each mid point; When having used near 112.5 hours and as the integral multiple of 1 replacement cycle of roll after promptly 72 * 2=144 hour; To bearing 3 refitting that replaces, during refitting the mid point between 2,4 of two points in addition on the bearing outside 6 is alignd with C point on the bearing block, carry out record.
After re-using 144 hours, bearing 3 taken off resets, when assembling specifically with on the bearing outside 6 with 1,3 between mid point align with C point on the bearing block, carry out record; And the like, repeating aforesaid operations, the mid point between four points, 1,2,3,4 every adjacent two points of demarcating on bearing outside 6 exhausts, and second recycles end cycle, altogether 144 * 4=576 hour service time.
After the second use cycle period finishes, through it is cleaned inspection, find that bearing 3 is all right, decision continues use.So bearing 3 is reset, be that calibration point on the bearing outside 6 is alignd like that C point of demarcating on the inferior mid point between 1 and 1,3 the mid point and the bearing block specifically, carry out record.And with shortening to service time of each time mid point, and be the roll integral multiple of 1 replacement cycle near L/8.
After the 3rd use cycle period begins; Get 1/8 promptly 56.25 hours reference points service time of its experience life value L as between each mid point and the calibration point mid point; When having used near 56.25 hours and as the integral multiple of 1 replacement cycle of roll after promptly 72 * 1=72 hour; To bearing 3 refitting that replaces, during refitting the inferior mid point between another calibration point 2 and 2 on the bearing outside 6,4 the mid point is alignd with C point on the bearing block, carry out record.
After re-using 72 hours, bearing 3 is taken off preparation reset, find that bearing 3 had lost efficacy when checking before the refitting, so stop using, the 3rd recycles end, 144 hours service time
Bearing 3 accumulative total was counted 864+576+144=1584 hour service time, and having more 1134 hours than 450 hours of experience life value L is nearly 3 times, and effect is remarkable.
The above only is one embodiment of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and modification, these improve and modification also should be regarded as protection scope of the present invention.
Claims (2)
1. the transposition assembling method of rolling mill bearing; It is characterized in that before bearing outside produces spot corrosion or fine fisssure,, reduce or reduce the role and influence of fatigue stress through changing the stress point of bearing outside; Stop the generation and the expansion of spot corrosion and fine fisssure; Be exactly replacement cycle with rolling mill bearing under traditional method for using as experience life value L, set up the use archives of bearing, the bearing and the bearing block of each frame of milling train carried out label respectively; Write down replacing date, the on-line time of each bearing, the time of rolling off the production line, transposition assembling situation, clean inspection situation, abnormal conditions, simultaneously each bearing on the milling train is followed the tracks of respectively; Before the assembling, outside each bearing block, respectively make a radially scale marking on the side plane, peripheral intervals is evenly made four scales or punctuate and is marked different marks respectively in the outer side plane upper edge of each bearing outside; When assembling first; With one in four calibrations demarcating on the bearing outside with bearing block on the scale marking align; Carry out record, when service time of rolling mill bearing near L/2 and after being the integral multiple of roll replacement cycle, bearing taken out assembles again; With aliging with the scale marking on the bearing block with symmetrical another calibration of calibration of record last time on the bearing outside, carry out record during assembling; Continue to use the time of using with first mark identical after; Ressemble after again bearing being taken out; The 3rd calibration that the calibration that uses with first record on the bearing outside is adjacent aligns with the scale marking on the bearing block during current assembling, carries out record; By that analogy, four scales or the punctuate mark on bearing outside, demarcated are finished using, and this process is called first and recycles the cycle.
2. the transposition assembling method of rolling mill bearing according to claim 1 is characterized in that setting up bearing and regularly cleans inspection system, after four calibration points of demarcating on the bearing outside are finished using; To thoroughly clean and each position of scrutiny bearing bearing; Like no abnormal situation, then bearing is reset, the mid point between certain adjacent two calibration on the bearing outside is alignd with the scale marking on the bearing block; Carry out record; With shortening to the integral multiple that is equivalent to time roll replacement cycle its service time and, then, bearing taken out assemble again near L/4; During assembling will and bearing outside on mid point between relative two calibrations in addition of this mid point of having write down align with the scale marking on the bearing block; Carry out record, after continuing to have used the service time identical, bearing is taken out ressemble again with above-mentioned mid point; During current assembling the mid point between other adjacent with used mid point on the bearing outside two calibrations is alignd with the scale marking on the bearing block, carry out record; By that analogy, finish using up to each adjacent two scale on the bearing outside or four mid points between the punctuate mark, this process is called second and recycles the cycle; Repeat above-mentioned bearing transposition assembling method; This time selected each point be four calibrations respectively and the centre position between four mid points; Shorten to the service time of a position in these eight centre positions near L/8 and be the integral multiple of roll replacement cycle, finishing using in each centre position, is called the 3rd to recycle the cycle; And the like, till bearing failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102000261A CN102728620A (en) | 2012-06-18 | 2012-06-18 | Transposition assembling method for bearing of rolling mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102000261A CN102728620A (en) | 2012-06-18 | 2012-06-18 | Transposition assembling method for bearing of rolling mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102728620A true CN102728620A (en) | 2012-10-17 |
Family
ID=46985317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102000261A Pending CN102728620A (en) | 2012-06-18 | 2012-06-18 | Transposition assembling method for bearing of rolling mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102728620A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032939A (en) * | 2015-07-21 | 2015-11-11 | 首钢京唐钢铁联合有限责任公司 | Method for prolonging service life of hot rolling plate belt roll bearing |
| CN105173273A (en) * | 2015-09-26 | 2015-12-23 | 红塔烟草（集团）有限责任公司大理卷烟厂 | Method for prolonging service life of cam roller of packaging machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643602A (en) * | 1987-06-26 | 1989-01-09 | Ocean Cable Co Ltd | Production of microfresnel lens |
| CN1730963A (en) * | 2005-08-18 | 2006-02-08 | 王小建 | A bearing mounting method |
| CN101675258A (en) * | 2007-03-02 | 2010-03-17 | 弗拉莫工程公司 | Bearing |
-
2012
- 2012-06-18 CN CN2012102000261A patent/CN102728620A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643602A (en) * | 1987-06-26 | 1989-01-09 | Ocean Cable Co Ltd | Production of microfresnel lens |
| CN1730963A (en) * | 2005-08-18 | 2006-02-08 | 王小建 | A bearing mounting method |
| CN101675258A (en) * | 2007-03-02 | 2010-03-17 | 弗拉莫工程公司 | Bearing |
Non-Patent Citations (1)
| Title |
|---|
| 朱长伟: "提高轧机轴承使用寿命的措施", 《轴承》, no. 11, 30 November 2006 (2006-11-30), pages 6 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032939A (en) * | 2015-07-21 | 2015-11-11 | 首钢京唐钢铁联合有限责任公司 | Method for prolonging service life of hot rolling plate belt roll bearing |
| CN105173273A (en) * | 2015-09-26 | 2015-12-23 | 红塔烟草（集团）有限责任公司大理卷烟厂 | Method for prolonging service life of cam roller of packaging machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107023561A (en) | It is used in particular for the double-row conical bearing of supporting wind power generation set armature spindle | |
| CN102728620A (en) | Transposition assembling method for bearing of rolling mill | |
| CN105522484B (en) | A kind of control processing method of glass carving and milling machine | |
| CN102234502B (en) | Corrosion inhibitor and preparation method | |
| CN105619030B (en) | A kind of taper roll bearing is without circulation Vehicle Processing technique | |
| ATE514522T1 (en) | GRINDING CENTER AND METHOD FOR SIMULTANEOUS GRINDING OF SEVERAL BEARINGS AND END SURFACES OF CRANKSHAFTS | |
| CN108637600A (en) | A kind of main bearing of shield machine reproducing method | |
| CN106584217A (en) | Grinding machining process of two half inner rings of angular contact ball bearing ring with oil tank | |
| CN105563105A (en) | Special press-fitting platform for core shaft type continuously-cast roller assembling and high-quality and high-efficiency assembling method of special press-fitting platform | |
| CN208457032U (en) | A kind of dissection type aligning roller bearing retainer and its self-aligning roller bearing | |
| CN108763803A (en) | The grinding machine analysis method decomposed based on crank-shaft link neck follow grinding profile errors | |
| CN103557812A (en) | Template used for measuring thickness of wall of high pressure turbine blade and application thereof | |
| CN1190655C (en) | Automobile engine and crankshaft detecting and repairing method | |
| CN1270872C (en) | One-step fixture-mounted grinding process of double rolling groove of bearing outer ring for railway wagon | |
| CN108161368A (en) | A kind of processing method of integral type shield arbor bearing retainer | |
| CN103486141B (en) | A kind of production method of high-precision polymer substrate joint shaft bearing | |
| CN209174591U (en) | A kind of vertical roll of rolling bearing measuring device for windage | |
| CN106595427A (en) | Inner ring assembling protrusion amount detection method for double inner ring double row angular contact ball bearing | |
| CN102000700B (en) | Reutilization method of work roll bearing of cold rolling mill | |
| CN101788008A (en) | Cylindrical thrust roller bearing with novel combined cage | |
| CN103934701B (en) | A kind of turner dress and processing method of diesel engine lubricating oil system three way cock | |
| CN101745774B (en) | Repairing method for spinning plate for spinning machine after wear and deformation | |
| CN205995965U (en) | The online flame straightening device of KOCKS milling train output shaft | |
| CN201644556U (en) | Straightening roll assembly for mechanical scale breakers | |
| CN107006893A (en) | Method for extending cigarette making and tipping machine separating wheel inner shaft, outer shaft service life |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121017 |