CN109731916A - Rolling mill bearing and its manufacturing method - Google Patents
Rolling mill bearing and its manufacturing method Download PDFInfo
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- CN109731916A CN109731916A CN201910175543.XA CN201910175543A CN109731916A CN 109731916 A CN109731916 A CN 109731916A CN 201910175543 A CN201910175543 A CN 201910175543A CN 109731916 A CN109731916 A CN 109731916A
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Abstract
The invention discloses a kind of rolling mill bearing and its manufacturing methods, rolling mill bearing is process by superior alloy steel forging, it is mounted on the support roller both ends on large-sized rolling mills in symmetrical structure, the sliding surface contacted with mill housing is equipped with copper shoe, the precision G6 of bearing hole, surface roughness Ra 1.6, cylindricity 0.03mm, the precision H8 of bearing (ball) cover matching hole, surface roughness Ra 3.2, two sides sliding surface surface roughness Ra 1.6, to bearing hole central symmetry degree 0.1mm, flatness 0.05mm above, below to sliding surface verticality 0.2mm, two sliding surfaces are symmetrically arranged with dowel hole, the precision H7 of dowel hole, surface roughness Ra 1.6, to bearing hole central symmetry degree 0.1mm, to bearing hole central perpendicularity 0.1mm, moistened using concentrating Sliding system passes in and out the ratio between hole depth and aperture of oilhole oil up to 20 or more.Meet quick-replaceable and the interchangeability requirement of support roller, accurate positioning, cooling and lubricating effect is good, and precision is high, reduces roll failure, ensure that processing quality.
Description
Technical field
The invention belongs to metallurgical rolling machinery fields, and in particular to a kind of rolling mill bearing and its manufacturing method.
Background technique
Rolling mill bearing is one of important component of rolling equipment, and rolling mill bearing is the person of directly taking on of roll load,
Roll-force is transmitted on rolling mill bearing by bearing, therefore, rationally whether rolling mill bearing holder structure, whether precision meets is wanted
Asking all has great influence to bearing service life and milling train safe operation.Rolling mill bearing receiving load is big, structure is complicated,
Required precision is high, the manufacturing cycle is long, processing is easily-deformable, is the object of many specialized factory's primary studies.
For existing rolling mill bearing, for some since unreasonable structure, intensity are uneven, part is easy to damage；Some is adding
It is influenced in work manufacturing process by residual stress, machining deformation occurs for bearing hole；It is a little fixed using inversion method processing two sides sliding surface
Position hole, position precision is insufficient, causes roll axis space crossed, influences product template precision.
Summary of the invention
The object of the present invention is to provide a kind of rolling mill bearing and its manufacturing method, meet the quick-replaceable and mutually of support roller
Transsexual requirement, accurate positioning, cooling and lubricating effect is good, and precision is high, reduces roll failure, ensure that processing quality.
The technical scheme adopted by the invention is that:
A kind of rolling mill bearing is process by superior alloy steel forging, is mounted on large-sized rolling mills in symmetrical structure
Support roller both ends and it can be embedded in the sliding surface contacted in mill housing and with mill housing with pressure oil cylinder up and down adjustment and be equipped with
Copper shoe；On rolling mill bearing, precision G6, surface roughness Ra 1.6, the cylindricity 0.03mm of bearing hole, bearing (ball) cover are matched
Close the precision H8 in hole, surface roughness Ra 3.2, two sides sliding surface surface roughness Ra 1.6, to bearing hole central symmetry degree
0.1mm, above flatness 0.05mm, below to sliding surface verticality 0.2mm, two sliding surfaces are symmetrically arranged with dowel hole, positioning
The precision H7 of pin hole, surface roughness Ra 1.6, to bearing hole central symmetry degree 0.1mm, to bearing hole central perpendicularity 0.1mm,
Using centralized lubricating system, the ratio between hole depth and aperture of oilhole oil are passed in and out up to 20 or more.
A method of above-mentioned rolling mill bearing is manufactured, comprising steps of
S1, blank forging；Forging process for fuel ratio >=4 guarantee that nothing is mingled with, folds, crackle, scabbing, white-spot defects；
S2, roughing；The uniform principle of surplus is first pressed, marks each hole and contour machining line, then process outer surface by scribing line,
Unilateral machining allowance is stayed, finally on the basis of machined surface, finds out bearing hole center, with reference to scribe fiducials, bearing hole is processed, stays
Unilateral machining allowance；
It is S3, quenched；It first heats and keeps the temperature, then by oil liquid quickly cooling to certain temperature, be air-cooled to room after last isothermal heat preservation
Temperature, quenching and tempering hardness are maintained at HB265~295；
S4, ultrasonic examination；Allow singleThe dispersion of equivalent diameter defect exists, and is more thanEquivalent diameter defect orWhen equivalent diameter defect integrated distribution is more than total area of detection 3%, repair or rejecting is handled；
S5, semifinishing；Inner hole is first processed on large-scale vertical lathe, then outer surface is processed on numerical control borer；
S6, stress relief annealing；It first heats and keeps the temperature, then with coming out of the stove after furnace Slow cooling certain temperature, be finally air-cooled to room
Temperature；
S7, finishing；Inner hole is first finished on large-scale vertical lathe, then finishes outer surface on numerical control borer, finally
Fuel feed hole and oil outlet are processed on deep hole working machine；
S8, bearing block magnetic powder inspection；Using magnetic powder inspection method, inner hole of bearing seat and two sides sliding surface crackle feelings are checked
Condition, not damaged to change into product examination, there are crackle then repair processes；
Oiling is put in storage after S9, bearing block passed examination.
In S3, when quenched, it is first heated to Ac1(Ac3)+50~100 DEG C and 1h is kept the temperature, then pass through oil liquid quickly cooling to 620
DEG C, it is air-cooled to room temperature after last isothermal heat preservation 2.5h, quenching and tempering hardness is maintained at HB265~295.
In S5, when processing inner hole on large-scale vertical lathe, on the basis of inner hole, along axial clamping work on large-scale vertical lathe
Part, centering process inner hole, stay unilateral machining allowance.
In S5, when processing outer surface on numerical control borer:
1) first clamping bearing block vertical on rotary table；
2) centering inner hole of bearing seat, and the processing bearing block end face on same station along the y axis, is stayed more than unilateral processing
Amount；
3) rotational workpieces 180 degree processes other end, stays unilateral machining allowance；
4) 90 degree of rotational workpieces are processed two sides sliding surface on the basis of bearing hole, stay unilateral machining allowance；
5) on 4) station, on the basis of 2) processing end face, two sliding surface dowel holes is processed, unilateral machining allowance is stayed；
6) two planes above and below overturning work pieces process, stay unilateral machining allowance.
In S6, when stress relief annealing, first it is heated to 450~550 DEG C and keeps the temperature 4h, then slowly cool to 380 DEG C with furnace
After come out of the stove, be finally air-cooled to room temperature.
In S7, when finishing inner hole on large-scale vertical lathe, on the basis of inner hole, along axial clamping work on large-scale vertical lathe
Part, centering process inner hole, stay unilateral machining allowance, reach required precision using grinding head dedicated fine grinding, polishing inner hole of bearing seat.
In S7, when finishing outer surface on numerical control borer:
1) the vertical clamping bearing block on rotary table；
2) centering inner hole along the y axis, and process end face on same station and required up to size；
3) rotational workpieces 180 degree processes other end with amesdial calibration of workpieces rotation position precision；
4) 90 degree of rotational workpieces are processed two on the basis of bearing hole and are breakked away with amesdial calibration of workpieces rotation position precision
Dynamic face reaches size requirement；
5) on step 4) station, on the basis of step 2) processing end face, two sliding surface dowel holes of processing are wanted up to size
It asks；
6) two planes require overturning work pieces process up to size up and down.
In S7, when processing fuel feed hole and oil outlet on deep hole working machine, first marking on slab indicates disengaging oilhole
Position, then on depth drill processing disengaging oilhole up to size require.
The beneficial effects of the present invention are:
Support roller can save spare parts cost in symmetrical structure, and size and the position degree requirement of rolling mill bearing meet branch
The quick-replaceable requirement of roller is supportted, dowel hole has installed axial limiting effect to support roller and ensure that support roller axially position is quasi-
Really, while the size of dowel hole and position degree requirement, interchangeability when meeting support roller use require, binary channels deep hole profit
Synovia oil pipe line ensure that rolling mill bearing cooling and lubricating effect；Applicants have found that influencing the main of rolling mill bearing precision
It is parallel with end face to bearing hole central symmetry degree and two longitudinal register pin holes because being known as bearing hole cylindricity, two sides sliding surface
Degree and mutual symmetry, therefore above-mentioned element is controlled emphatically, it ensure that the precision of rolling mill bearing, it is stable
Reliably, to reduce roll failure, bearing service life is extended, unit lumber recovery and operating rate is improved, reduces and set
The standby cost of overhaul.
When manufacture, using the principle of " asperities essence hole, hole face combination ", when roughing, first machined surface post-processing hole is preferential to protect
Bearing hole precision is demonstrate,proved, when finishing, first processes hole post-processing face, on the basis of hole, each functional surfaces are processed, to ensure position precision,
Whole process improves bearing block performance and solves machining deformation, ensure that processing quality using being heat-treated twice.
Detailed description of the invention
Fig. 1 is the front view of drawing of the present invention.
Fig. 2 is the longitudinal sectional drawing of Fig. 1.
Fig. 3 is the sectional view in Fig. 1 at K-K.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 1 to Figure 3, a kind of rolling mill bearing is process by superior alloy steel forging, is mounted on large-sized rolling mills
It is upper to be in the support roller both ends of symmetrical structure and be embedded in mill housing and be connect with mill housing with pressure oil cylinder up and down adjustment
The sliding surface of touching is equipped with copper shoe；On rolling mill bearing, the precision G6 of bearing hole, surface roughness Ra 1.6, cylindricity
0.03mm, the precision H8 of bearing (ball) cover matching hole, surface roughness Ra 3.2, two sides sliding surface surface roughness Ra 1.6, to axis
Bearing bore central symmetry degree 0.1mm, above flatness 0.05mm, below to sliding surface verticality 0.2mm, two sliding surfaces are symmetrically arranged with
Dowel hole, the precision H7 of dowel hole, surface roughness Ra 1.6, to bearing hole central symmetry degree 0.1mm, in bearing hole
Heart verticality 0.1mm passes in and out the ratio between hole depth and aperture of oilhole oil up to 20 or more using centralized lubricating system.
The step of manufacturing above-mentioned rolling mill bearing are as follows:
S1, blank forging；
Forging process for fuel ratio >=4 guarantee that nothing is mingled with, folds, crackle, scabbing, white-spot defects.
S2, roughing；
The uniform principle of surplus is first pressed, marks each hole and contour machining line, then by scribing line processing outer surface, stay unilateral 8mm
Machining allowance finds out bearing hole center finally on the basis of machined surface, with reference to scribe fiducials, processes bearing hole, stays unilateral
8mm machining allowance.
It is S3, quenched；
First it is heated to Ac1(Ac3)+50~100 DEG C and 1h is kept the temperature, then by oil liquid quickly cooling to 620 DEG C, last isothermal heat preservation
Room temperature is air-cooled to after 2.5h, quenching and tempering hardness is maintained at HB265~295.
S4, ultrasonic examination；
Allow singleThe dispersion of equivalent diameter defect exists, and is more thanEquivalent diameter defect orEquivalent diameter defect
When integrated distribution is more than total area of detection 3%, repair or rejecting is handled.
S5, semifinishing；
Inner hole is first processed on large-scale vertical lathe；On the basis of inner hole, along axial clamping workpiece on large-scale vertical lathe, centering adds
Work inner hole stays unilateral 3mm machining allowance.
Outer surface is processed on numerical control borer again:
1) first clamping bearing block vertical on rotary table；
2) centering inner hole of bearing seat, and the processing bearing block end face on same station along the y axis, stays unilateral 3mm to process
Surplus；
3) rotational workpieces 180 degree processes other end, stays unilateral 3mm machining allowance；
4) 90 degree of rotational workpieces are processed two sides sliding surface on the basis of bearing hole, stay unilateral 3mm machining allowance；
5) on 4) station, on the basis of 2) processing end face, two sliding surface dowel holes are processed, are stayed more than unilateral 3mm processing
Amount；
6) two planes above and below overturning work pieces process, stay unilateral 3mm machining allowance.
S6, stress relief annealing；
It is first heated to 450~550 DEG C and keeps the temperature 4h, then come out of the stove after slowly cooling to 380 DEG C with furnace, be finally air-cooled to room
Temperature.
S7, finishing；
Inner hole is first finished on large-scale vertical lathe；On the basis of inner hole, along axial clamping workpiece, centering on large-scale vertical lathe
Inner hole is processed, unilateral 0.6mm machining allowance is stayed, required precision is reached using grinding head dedicated fine grinding, polishing inner hole of bearing seat.
Outer surface is finished on numerical control borer again:
1) the vertical clamping bearing block on rotary table；
2) centering inner hole along the y axis, and process end face on same station and required up to size；
3) rotational workpieces 180 degree processes other end with amesdial calibration of workpieces rotation position precision；
4) 90 degree of rotational workpieces are processed two on the basis of bearing hole and are breakked away with amesdial calibration of workpieces rotation position precision
Dynamic face reaches size requirement；
5) on step 4) station, on the basis of step 2) processing end face, two sliding surface dowel holes of processing are wanted up to size
It asks；
6) two planes require overturning work pieces process up to size up and down.
Fuel feed hole and oil outlet are finally processed on deep hole working machine；First marking on slab indicates the position of disengaging oilhole
It sets, then processing disengaging oilhole is required up to size on depth drill.
S8, bearing block magnetic powder inspection；
Using magnetic powder inspection method, inner hole of bearing seat and two sides sliding surface cracks are checked, it is not damaged to change into product examination,
There are crackle then repair processes.
Oiling is put in storage after S9, bearing block passed examination.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (9)
1. a kind of rolling mill bearing, it is characterised in that: be process by superior alloy steel forging, being mounted on large-sized rolling mills is in pair
Claim the support roller both ends of structure and the cunning contacted in mill housing and with mill housing can be embedded in pressure oil cylinder up and down adjustment
Dynamic face is equipped with copper shoe；On rolling mill bearing, precision G6, surface roughness Ra 1.6, the cylindricity 0.03mm of bearing hole, axis
The precision H8 of socket end lid matching hole, surface roughness Ra 3.2, two sides sliding surface surface roughness Ra 1.6, to bearing hole center pair
Title degree 0.1mm, above flatness 0.05mm, below to sliding surface verticality 0.2mm, two sliding surfaces are symmetrically arranged with dowel hole,
The precision H7 of dowel hole, surface roughness Ra 1.6, to bearing hole central symmetry degree 0.1mm, to bearing hole central perpendicularity
0.1mm passes in and out the ratio between hole depth and aperture of oilhole oil up to 20 or more using centralized lubricating system.
2. a kind of method for manufacturing rolling mill bearing as described in claim 1, it is characterised in that: including step,
S1, blank forging；Forging process for fuel ratio >=4 guarantee that nothing is mingled with, folds, crackle, scabbing, white-spot defects；
S2, roughing；The uniform principle of surplus is first pressed, marks each hole and contour machining line, then by scribing line processing outer surface, stay list
Side machining allowance finds out bearing hole center finally on the basis of machined surface, with reference to scribe fiducials, processes bearing hole, stays unilateral
Machining allowance；
It is S3, quenched；It first heats and keeps the temperature, then by oil liquid quickly cooling to certain temperature, be air-cooled to room temperature after last isothermal heat preservation, adjust
Matter hardness is maintained at HB265~295；
S4, ultrasonic examination；Allow singleThe dispersion of equivalent diameter defect exists, and is more thanEquivalent diameter defect orWhen
When measuring diameter imperfections integrated distribution more than total area of detection 3%, repair or rejecting is handled；
S5, semifinishing；Inner hole is first processed on large-scale vertical lathe, then outer surface is processed on numerical control borer；
S6, stress relief annealing；It first heats and keeps the temperature, then with coming out of the stove after furnace Slow cooling certain temperature, be finally air-cooled to room temperature；
S7, finishing；Inner hole is first finished on large-scale vertical lathe, then finishes outer surface on numerical control borer, finally in depth
Fuel feed hole and oil outlet are processed on hole machined lathe；
S8, bearing block magnetic powder inspection；Using magnetic powder inspection method, inner hole of bearing seat and two sides sliding surface cracks, nothing are checked
Damage changes into product examination, and there are crackle then repair processes；
Oiling is put in storage after S9, bearing block passed examination.
3. a kind of as claimed in claim 2 method of manufacture rolling mill bearing, it is characterised in that: in S3, when quenched, first plus
Heat is to Ac1(Ac3)+50~100 DEG C and 1h is kept the temperature, then by oil liquid quickly cooling to 620 DEG C, be air-cooled to after last isothermal heat preservation 2.5h
Room temperature, quenching and tempering hardness are maintained at HB265~295.
4. a kind of method of manufacture rolling mill bearing as claimed in claim 2, it is characterised in that: in S5, in large-scale vertical lathe
When upper processing inner hole, on the basis of inner hole, along axial clamping workpiece on large-scale vertical lathe, centering processes inner hole, stays unilateral processing
Surplus.
5. a kind of method of manufacture rolling mill bearing as claimed in claim 2, it is characterised in that: in S5, in numerical control borer
When upper processing outer surface:
1) first clamping bearing block vertical on rotary table；
2) centering inner hole of bearing seat, and the processing bearing block end face on same station along the y axis, stays unilateral machining allowance；
3) rotational workpieces 180 degree processes other end, stays unilateral machining allowance；
4) 90 degree of rotational workpieces are processed two sides sliding surface on the basis of bearing hole, stay unilateral machining allowance；
5) on 4) station, on the basis of 2) processing end face, two sliding surface dowel holes is processed, unilateral machining allowance is stayed；
6) two planes above and below overturning work pieces process, stay unilateral machining allowance.
6. a kind of method of manufacture rolling mill bearing as claimed in claim 2, it is characterised in that: in S6, stress relief annealing
When, it is first heated to 450~550 DEG C and keeps the temperature 4h, then come out of the stove after slowly cooling to 380 DEG C with furnace, be finally air-cooled to room temperature.
7. a kind of method of manufacture rolling mill bearing as claimed in claim 2, it is characterised in that: in S7, in large-scale vertical lathe
When upper finishing inner hole, on the basis of inner hole, along axial clamping workpiece on large-scale vertical lathe, centering processes inner hole, stays unilateral add
Spare time amount reaches required precision using grinding head dedicated fine grinding, polishing inner hole of bearing seat.
8. a kind of method of manufacture rolling mill bearing as claimed in claim 2, it is characterised in that: in S7, in numerical control borer
When upper finishing outer surface:
1) the vertical clamping bearing block on rotary table；
2) centering inner hole along the y axis, and process end face on same station and required up to size；
3) rotational workpieces 180 degree processes other end with amesdial calibration of workpieces rotation position precision；
4) 90 degree of rotational workpieces process two sides sliding surface with amesdial calibration of workpieces rotation position precision on the basis of bearing hole
Reach size requirement；
5) on step 4) station, on the basis of step 2) processing end face, two sliding surface dowel holes of processing are required up to size；
6) two planes require overturning work pieces process up to size up and down.
9. a kind of method of manufacture rolling mill bearing as claimed in claim 2, it is characterised in that: in S7, in deep hole machining
Process fuel feed hole on lathe and when oil outlet, first marking on slab indicate the position of disengaging oilhole, then process on depth drill into
Oil outlet is required up to size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910175543.XA CN109731916B (en) | 2019-03-08 | 2019-03-08 | Rolling mill bearing seat and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910175543.XA CN109731916B (en) | 2019-03-08 | 2019-03-08 | Rolling mill bearing seat and manufacturing method thereof |
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| CN109731916A true CN109731916A (en) | 2019-05-10 |
| CN109731916B CN109731916B (en) | 2020-10-30 |
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| CN201910175543.XA Active CN109731916B (en) | 2019-03-08 | 2019-03-08 | Rolling mill bearing seat and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111604647A (en) * | 2020-06-03 | 2020-09-01 | 中钢集团西安重机有限公司 | Processing and inspection method for roller system bearing block of cold rolling mill |
| CN111889717A (en) * | 2020-06-30 | 2020-11-06 | 成都飞机工业（集团）有限责任公司 | High-precision bearing mounting hole machining method based on three-coordinate machine tool |
| CN115319408A (en) * | 2022-07-27 | 2022-11-11 | 江阴市美托金属制品有限公司 | Large cast iron bearing seat machining process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148901A (en) * | 2014-08-17 | 2014-11-19 | 成都亨通兆业精密机械有限公司 | Bearing base production process capable of well reducing heat treatment defects |
| CN104148902A (en) * | 2014-08-17 | 2014-11-19 | 成都亨通兆业精密机械有限公司 | Machining method benefiting to hole boring quality and bearing base mechanical property |
| JP5640528B2 (en) * | 2010-07-29 | 2014-12-17 | 日本精工株式会社 | Rolling bearing |
-
2019
- 2019-03-08 CN CN201910175543.XA patent/CN109731916B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5640528B2 (en) * | 2010-07-29 | 2014-12-17 | 日本精工株式会社 | Rolling bearing |
| CN104148901A (en) * | 2014-08-17 | 2014-11-19 | 成都亨通兆业精密机械有限公司 | Bearing base production process capable of well reducing heat treatment defects |
| CN104148902A (en) * | 2014-08-17 | 2014-11-19 | 成都亨通兆业精密机械有限公司 | Machining method benefiting to hole boring quality and bearing base mechanical property |
Non-Patent Citations (4)
| Title |
|---|
| 乐山冶金机械轧辊厂: "武钢一米七冷连轧机轴承座", 《特殊钢》 * |
| 肖磊等: "铝带轧机轧辊轴承座加工工艺分析与质量控制", 《有色金属加工》 * |
| 边述华等: "轧机辊轴承座的机械加工工艺研究", 《长沙大学学报》 * |
| 陈云等: "轧机轴承座工艺分析", 《机械工程师》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111604647A (en) * | 2020-06-03 | 2020-09-01 | 中钢集团西安重机有限公司 | Processing and inspection method for roller system bearing block of cold rolling mill |
| CN111604647B (en) * | 2020-06-03 | 2022-04-01 | 中钢集团西安重机有限公司 | Processing and inspection method for roller system bearing block of cold rolling mill |
| CN111889717A (en) * | 2020-06-30 | 2020-11-06 | 成都飞机工业（集团）有限责任公司 | High-precision bearing mounting hole machining method based on three-coordinate machine tool |
| CN111889717B (en) * | 2020-06-30 | 2021-12-10 | 成都飞机工业（集团）有限责任公司 | High-precision bearing mounting hole machining method based on three-coordinate machine tool |
| CN115319408A (en) * | 2022-07-27 | 2022-11-11 | 江阴市美托金属制品有限公司 | Large cast iron bearing seat machining process |
| CN115319408B (en) * | 2022-07-27 | 2023-06-09 | 江阴市美托金属制品有限公司 | Processing technology of large cast iron bearing seat |
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| CN109731916B (en) | 2020-10-30 |
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