CN107747090A - A kind of method of laser remanufacturing rolling mill bearing - Google Patents
A kind of method of laser remanufacturing rolling mill bearing Download PDFInfo
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- CN107747090A CN107747090A CN201710990379.9A CN201710990379A CN107747090A CN 107747090 A CN107747090 A CN 107747090A CN 201710990379 A CN201710990379 A CN 201710990379A CN 107747090 A CN107747090 A CN 107747090A
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- bearing
- liner plate
- laser
- rolling mill
- mounting surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/106—Coating with metal alloys or metal elements only
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention provides a kind of method of laser remanufacturing rolling mill bearing, using laser as thermal source, installed in bearing block bearing on internal surface of hole and liner plate mounting surface cladding with wear-resisting, impact resistance, it is corrosion-resistant, the cobalt-based material or super stainless steel material for being easy to machining form cladding alloy functional layer, smart machine recovers rolling mill bearing original design size and form and position tolerance after adding, laser melting coating functional layer remaining thickness is 0.3 0.5mm, bearing block bearing installation hole surface is improved simultaneously, the surfacing mechanical performance at liner plate mounting surface position, reach and repair the new effect of old victory, extend the service life of rolling mill bearing, reduce the wasting of resources, improve the economic benefit of enterprise.
Description
Technical field
The present invention relates to a kind of reproducing method of rolling mill bearing, the particularly side of laser remanufacturing rolling mill bearing
Method.
Background technology
Four-high mill is the conventional pattern of strip-mill strip, is widely used in the plastic working of steel and non-ferrous metal, often
Respectively there is a bearing block at two backing rolls of portion's milling train and two working rolls, each roll both ends, and a rolling mill yield reaches 50,000
During ton steel or so, it is necessary to more roll change system, backing roll or the working roll body of roll are refaced, to ensure the normal work of rolling line,
One milling train usually requires three sets of roller systems as spare part.The current steel annual production in China is 800,000,000 tons, existing 12.8 ten thousand bearing blocks
Using, be required for repairing to certain time, therefore it is vast to remanufacture bearing block market.
Bearing block is one of core component of sheet material and bar and wire mill, and the height of its precision directly affects rolled products
Quality, it complicated, the required precision of bearing hole is high, and Wall-Thickness Difference is big, and thermal stress deformation is uneven, mechanical processing difficulty
It is very big.Two sides are also very high to the Geometrical Tolerance Principle of axis hole simultaneously, and its machine adds precision to directly affect general assembly precision.
All the time, the bearing block spare part of high production capacity milling train is external import, domestic on the one hand to increase the system of development for this situation
The research and development of Bearing with high properties seat are made, damage bearing block method is repaired and remanufactured on the other hand research.
Re-manufacturing technology is a kind of industry for implementing high-tech reparation and transformation to waste product, it be directed to damage or
The parts that will be scrapped, on the basis of the analysis such as performance failure analysis, life appraisal, Rebuilding engineering design is carried out, is used
A series of related advanced manufacturing technologies, make to remanufacture product quality and meet or exceed new product.
Re-manufacturing technology refers to using advanced surface engineering technology as reparation means, is meeting or exceeding and original new product
On the premise of phase homogenous quantities and performance, used facilities parts, engineering machinery, lathe etc. are carried out to the mass of specialized reparation
Production process.The service life of electronic product can not only be extended by remanufacturing, and electronic product technical performance and added value be improved, with system
Make new product to compare, remanufacture product escapable cost, energy-saving material-saving, be recycling economy " recycling " advanced form.Therefore nothing
By being blank source or remanufacture process, the discharge to the demand of the energy and resource, to waste waste gas is all few, is true
Green manufacturing in positive meaning, effectively promotes the construction of resource-conserving and environment-friendly society.2005, State Council
File points out country's " support worn-out machine tools remanufacture ", and " tissue related green re-manufacturing technology and its innovation ability
Research and development ".The ministries and commissions of November in the same year, National Development and Reform Committee etc. 6, which combine, to print and distribute《On organizing circular economy pilot projects (first) work
The notice of work》, one of four major fields are listed in wherein remanufacturing.Central 11 ministries and commissions joint issue in 2010《On pushing away
Enter the opinion of remanufacturing industry development》Also explicitly point out:Tissue establishment remanufacturing industry development plan, develop and publish《Remanufacture
Catalogue》, promote remanufacturing industry development.
As the theory that remanufactures gradually is received by society, China's remanufacturing industry is just obtaining positive progress, and industry size is not
It is disconnected to expand.Traditional re-manufacturing technology mainly includes argon arc welding, spraying, plating, brush plating etc..Laser remanufacturing technology is new in recent years
A kind of emerging technology mode, laser melting coating are one of Main Means of laser remanufacturing technology.The appearance of laser remanufacturing technology
Having broken traditional re-manufacturing technology repair materials and can repair the limitation of part shape etc., breach re-manufacturing technology
Limitation, using laser remanufacturing technology repair high temperature, high pressure, high rotating speed turbo-power machinery parts, successively by petrochemical industry,
More than ten of industry accreditation such as electric power, metallurgy, automobile.2008, laser processing technology included the field of remanufacturing, and referred to as laser is made again
Make.
The technology of laser remanufacturing has high-quality, efficient, energy-conservation, section material, the advantage such as environmental protection, generally with damage and waste and old
Parts find in production application as remanufacturing object, and the waste and old part treated by laser remanufacturing is not only
Only recover original performance parameter, the performance indications of even better than new part, so in recent years laser remanufacturing technology also progressively into
A kind of high performance means are put forward for new product.
New product rolling mill bearing substrate material is usually cast steel, due to complicated, wall unevenness, and size and form and position tolerance
It is required that it is high, after general casting finishes destressing Ageing Treatment, directly carry out thick machine and add, thick machine is modulated heat treatment again after adding,
Last machine add-on type.Roll-force and driving torque in the operation of rolling, rolling mill bearing mounting hole and with memorial archway face coordinate
Huge frictional force and impulsive force are born in face, and bearing mounting hole face groove mark is occurred, and abrasion forces bearing to be pacified to a certain extent
Fill bore deformation, bearing distortion-clamping and saggar.Bearing support lining plate mounting surface is due to corroding and impact subtracts chi, bearing block positioning simultaneously
Precise decreasing, journal offset is caused to aggravate bearing block torsional deformation.
So the stability for keeping bearing block mounting hole and liner plate mounting surface size is to use the rolling mill bearing long-life
Basis.It is long-term to keep intensity and pose accuracy for ensureing as the positioning datum of rolling mill roll and the bearing block of brace foundation
Mill milling quality plays vital effect.
The content of the invention
Size and the accuracy of form and position is caused to lose milling train production after by roll-force impact process to solve rolling mill bearing
The problem of product quality or bearing block damage seriously cause to scrap, the present invention provides a kind of side of laser remanufacturing rolling mill bearing
Method, using laser as thermal source, being installed in bearing block bearing has wear-resisting, impact resistance, corrosion resistant on hole surface and liner plate mounting surface cladding
The cobalt-based or super stainless steel material function layer of machining are lost, are easy to, smart machine recovers rolling mill bearing original design size after adding
And form and position tolerance, while improve bearing block bearing installation hole surface, the portion faces material property such as liner plate mounting surface, reach repair it is old
Win new effect.
The present invention solves the technical scheme that technical problem underlying uses：
Using laser melting coating re-manufacturing technology, bearing block key position is included bearing mounting hole inner surface 5 as shown in Figure 3,
Left liner plate mounting surface 6, right liner plate mounting surface 7 carry out laser melting coating, are formed and matrix metallurgical binding in these former working face positions
Cobalt-based material or super stainless steel material laser cladding functional layer, through precision machine adding method and technique, retain laser melting coating
Functional layer thickness is 0.3-0.5mm, makes rear size and form and position tolerance as shown in figure 4, simultaneously adding smart machine and meets original drawing
Design size requirement.
The laser remanufacturing processing of rolling mill bearing is that complicated metal composite adds the process being combined with accurate machine, point
For：1st, waste and old cleaning rolling mill bearing seat；2nd, thick machine adds the damage surface for removing position to be processed to expose brand-new base material；3rd, laser melts
Cover；4th, precision optical machinery is processed.
Such as Fig. 2, bearing mounting hole surface 5 and left liner plate mounting surface 6, right liner plate mounting surface 7 are the need to ensure that and strengthened
Three positions.
The requirement that bearing mounting hole surface 5 is assembled has good cylindricity, surface roughness and dimensional accuracy, therefore it is required that
The material property of hole surface has wearability, impact resistance, anti-corrosive properties, is easy to be machined.For these requirements, the present invention selects
Cobalt-base alloys of the hardness between HRC32-35, main component are：C（1.0-1.5）、W（4.0-5.0）、Ni（1.5-3.0）、Fe
（1.0-2.5）、Cr（27-30）、Si（0.8-1.5）、Co （Remaining）.The mechanical performance of the alloy is much better than the casting of bearing block matrix
Steel material.
By laser by cobalt-based material cladding to bearing block mounting hole matrix surface 5, new cladding alloy work(is formed
Ergosphere.
Left liner plate mounting surface 6, right liner plate mounting surface 7 are cooled aqueous corrosion and scale extruding in the operation of rolling, are rolling
Process bottom bracket processed has relative motion with memorial archway face, therefore it is required that liner plate mounting surface remains dimensionally-stable, it is desirable to surfacing
Corrosion-resistant, wear-resistant, high rigidity while high tenacity.To meet the requirement, the present invention surpassing between HRC30-35 from hardness
Level stainless steel material, composition are as follows：C（0.1-0.5）、Ni（2.5-3.0）、B（1.0-2.5）、Cr（14-20）、Si（0.8-
1.5）、 Mo（0.8-1.3）Fe（Remaining）.The mechanical performance of the alloy is much better than bearing block matrix cast steel material.
By laser by cobalt-based material cladding to the left liner plate mounting surface 6 of bearing block and right liner plate mounting surface 7, formed and new swashed
Light cladding alloy functional layer.
The beneficial effects of the invention are as follows：Pass through the rolling mill bearing key position inner hole of bearing seat surface to damaging or scrapping
5th, left liner plate mounting surface 6, right liner plate mounting surface 7 are by laser remanufacturing method, according to diverse location to working surface function
Difference requires that cladding different metal material forms the laser melting coating functional layer with rolling mill bearing matrix metallurgical binding, warp respectively
Recover rolling mill bearing original design size and form and position tolerance after precision machining, at the same improve bearing block bearing installation hole surface,
The surfacing mechanical performance of liner plate mounting surface, reach and repair the new effect of old victory.Extend the service life of rolling mill bearing, reduce
The wasting of resources, improve the economic benefit of enterprise.
Figure of description is as follows：
Fig. 1 is that milling train driving side roll is illustrated with bearing block assembly relation
Fig. 2 is that milling train fore side roll is illustrated with bearing block assembly relation
Fig. 3 is the signal of rolling mill bearing laser melting coating position
Fig. 4 is the signal of laser melting coating functional layer thickness
Sequence number is explained as follows in figure：
1 --- milling train driving side top working roll bearing block；2 --- milling train driving side bottom working roll bearing block；3 --- milling train operates
Side top working roll bearing block；4 --- milling train fore side top working roll bearing block；5 --- bearing mounting hole；6 --- left liner plate peace
Dress face；7 --- right liner plate mounting surface；8 --- processing datum；9 --- bearing hole, liner plate mounting surface base material；10 --- bearing
Hole, liner plate mounting surface laser melting coating functional layer.
Embodiment：
The present invention is by taking the working roll of production line of rolling mill as an example, and two rolls and driving side and fore side are each one totally four up and down per side
Individual bearing block assembling uses.
Such as Fig. 3, by taking milling train driving side bottom working roll bearing block 2 as an example.Before laser melting coating, bearing mounting hole 5 needs machine
Tool is worked into bigger 0.6-1.0mm than final diameter size, and this processing removes the damaging of the inner surface of bearing mounting hole 5, rotten simultaneously
Layer is lost, exposes primary substrate.
On the inner surface base material of bearing mounting hole 5, cobalt-base alloys of the laser melting coating hardness between HRC32-35, formed and swashed
Light cladding functional layer.The laser melting coating functional layer is carried out into thick machine to add, 0.2-0.3mm allowance for finish is reserved, is made with endoporus
For symmetric reference locating surface, with bearing block it is original be the vertical machining benchmark of liner plate mounting surface with liner plate mounting surface vertical plane 8.
It is positioning datum with processing datum 8, left liner plate mounting surface 6, right liner plate mounting surface 7 is machined, made
Two surfaces are smaller 0.3-0.5mm than final size, and this processing removes left liner plate mounting surface 6, the right table of liner plate mounting surface 7 simultaneously
The damage in face, corrosion layer, expose primary substrate.
On left liner plate mounting surface 6, the right base material of liner plate mounting surface 7, laser melting coating hardness is the super stainless of HRC54 or so
Steel material, form the laser melting coating functional layer that thickness is 0.8-1mm.
The laser melting coating functional layer progress secondary fine machine of the inner surface of bearing mounting hole 5 is added, makes up to former drawing requirement
Tip dimensions, cladding layer can retain 0.3-0.5mm thickness.
Smart machine is carried out to left liner plate mounting surface 6, right liner plate mounting surface 7 with inner hole of bearing seat surface 5 and processing datum 8
Add, reach and bearing mounting hole axisymmetrical degree requirement.
Worked on milling train driving side top working roll bearing block 1, milling train fore side top working roll bearing block 3 and milling train fore side
The embodiment of roll bearing seat 4 is identical with the embodiment of above-mentioned milling train driving side bottom working roll bearing block 2.
Claims (4)
- A kind of 1. method of laser remanufacturing rolling mill bearing, it is characterised in that：Using laser as thermal source, the table in bearing mounting hole Face 5, left liner plate mounting surface 6 and right liner plate mounting surface 7 are respectively formed laser melting coating functional layer.
- 2. based on the laser melting coating functional layer described in claim 1, it is characterised in that：The inner surface laser cladding of bearing mounting hole 5 Functional layer is cobalt-base alloys.
- 3. based on the laser melting coating functional layer described in claim 1, it is characterised in that：Left liner plate mounting surface 6 and the installation of right liner plate The laser melting coating functional layer of face 7 is super stainless steel alloy.
- A kind of 4. method of laser remanufacturing rolling mill bearing, it is characterised in that：To the inner surface laser cladding of bearing mounting hole 5 The functional layer thick machine added-time, 0.2-0.3mm allowance for finish is reserved, and in this, as symmetric reference locating surface, to pacify with liner plate Dress face vertical plane 8 is vertical machining benchmark, and left liner plate mounting surface 6, right liner plate mounting surface 7 are machined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710990379.9A CN107747090A (en) | 2017-10-23 | 2017-10-23 | A kind of method of laser remanufacturing rolling mill bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710990379.9A CN107747090A (en) | 2017-10-23 | 2017-10-23 | A kind of method of laser remanufacturing rolling mill bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107747090A true CN107747090A (en) | 2018-03-02 |
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| CN201710990379.9A Pending CN107747090A (en) | 2017-10-23 | 2017-10-23 | A kind of method of laser remanufacturing rolling mill bearing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561029A (en) * | 2019-09-03 | 2019-12-13 | 齐齐哈尔众工科技有限公司 | Method for repairing bearing hole of speed reducer shell |
| CN111531319A (en) * | 2020-05-08 | 2020-08-14 | 河南柴油机重工有限责任公司 | Method for repairing main shaft hole of internal combustion engine body and application |
| CN113878299A (en) * | 2021-09-09 | 2022-01-04 | 中国航发南方工业有限公司 | Method for repairing and processing bearing pedestal bushing |
| CN114918611A (en) * | 2022-05-19 | 2022-08-19 | 泰尔(安徽)工业科技服务有限公司 | Repairing method for bearing seat of hot rolling large-scale rolling mill |
-
2017
- 2017-10-23 CN CN201710990379.9A patent/CN107747090A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561029A (en) * | 2019-09-03 | 2019-12-13 | 齐齐哈尔众工科技有限公司 | Method for repairing bearing hole of speed reducer shell |
| CN111531319A (en) * | 2020-05-08 | 2020-08-14 | 河南柴油机重工有限责任公司 | Method for repairing main shaft hole of internal combustion engine body and application |
| CN113878299A (en) * | 2021-09-09 | 2022-01-04 | 中国航发南方工业有限公司 | Method for repairing and processing bearing pedestal bushing |
| CN113878299B (en) * | 2021-09-09 | 2022-10-18 | 中国航发南方工业有限公司 | Method for repairing and processing bearing pedestal bushing |
| CN114918611A (en) * | 2022-05-19 | 2022-08-19 | 泰尔(安徽)工业科技服务有限公司 | Repairing method for bearing seat of hot rolling large-scale rolling mill |
| CN114918611B (en) * | 2022-05-19 | 2023-10-20 | 泰尔(安徽)工业科技服务有限公司 | Repairing method for bearing seat of hot-rolled large-scale rolling mill |
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Application publication date: 20180302 |