CN104308451B - Speed reducer bearing block repair method - Google Patents
Speed reducer bearing block repair method Download PDFInfo
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- CN104308451B CN104308451B CN201410646019.3A CN201410646019A CN104308451B CN 104308451 B CN104308451 B CN 104308451B CN 201410646019 A CN201410646019 A CN 201410646019A CN 104308451 B CN104308451 B CN 104308451B
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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
Abstract
A speed reducer bearing block repair method includes the steps: (1) disassembling a speed reducer, cleaning a bearing block, detecting the size of the bearing block, determining a damaged portion and abrasion loss and removing a fatigue layer; (2) pre-coating the surface of a substrate of the bearing block with pure carbon powder mixed with white emulsion, and performing plasma arc cladding; (3) pre-coating the surface of an inner hole of the bearing block having a carbon powder layer with prepared alloy powder by plasma arc cladding; (4) performing machining and flaw detection for the clad bearing block to obtain the bearing block with the size and tolerance meeting requirements and assemble the speed reducer. The alloy powder comprises, in weight percent, 0.3%-0.5% of C, 14%-16% of Cr, 16%-18% of Fe, 2%-2.8% of P, 2.5%-3% of Si, 1%-3% of W and the balance Ni. The repair method is simple in process, high in controllability and less in energy consumption, the service life of the bearing block is obviously prolonged, and reliability of the bearing block is obviously improved.
Description
Technical field
The invention belongs to field of machining, particularly to a kind of restorative procedure of reducer shaft bearing.
Background technology
Decelerator, is a kind of widely used important drive apparatus of industrial circle.Decelerator during life-time service, by
In factors such as working condition is severe, metal fatigue, abrasions, heating easily occurs, makes sound and oil leak situation, very at bearing block position
To bearing " outer ring rotating " phenomenon occurs, such as repair not in time, have a strong impact on the safe operation of decelerator, cause production accident.
Because bearing material intensity is high, hardness is big, running accuracy height, it is desirable to reducer shaft bearing materials hardness is moderate, resists
Impact and damping property are good.Reducer shaft bearing mainly adopts casting pig, and solderability is poor, easily produces white structure, gas during welding
Hole and crackle, conventional soldering method is not suitable for repairing bearing block.
At present, reducer shaft bearing mainly has two kinds of restorative procedures: one kind is using bushing method, abrasion bearing block with
Add set between bearing, but the method shortcoming is substantially, set is too small with bearing clearance, is easily caused bearing heating, otherwise easily makes bearing
Landing, and it is restricted to repair number of times；Second is to adopt brazing process, but the method complex process, long in time limit, high cost, and
And copper alloy is softer, generation scaling easy to wear after reparation, lead to bearing to produce eccentric wear and fever phenomenon.Above-mentioned recovery technique is
Industrial and mining establishment cannot be met for the reducer shaft bearing long-life after repairing, high-quality requirement, in the urgent need to a kind of mental retardation
The strong restorative procedure of consumption, low cost, environmental protection, high life, process controllability.
Content of the invention
It is an object of the invention to provide a kind of process is simple, controllability are limited, can be improved bearing by force, not by repairing number of times
The restorative procedure of the reducer shaft bearing of seat service life.After the present invention mainly adopts plasma-arc method reparation abrasion
Reducer shaft bearing.
Technical scheme comprises the following steps:
(1) disassemble decelerator, bearing cleaning seat, remove dust on bearing block, greasy dirt, corrosion etc., then detected size,
Determine abrading section and the wear extent of bearing block；
(2) according to testing result, remove the fretting fatigue layer of bearing block, generally 0.5～1.5mm, new adding
Work face；
(3) by pure carbon powder and white glue with vinyl by weight mixing for 16:1, stir, using hairbrush by mixed carbon dust
Equably brush in bearing block substrate surface, dry, pre- blackening thickness is 0.2mm；The granularity of described pure carbon powder be 200～
350 mesh；
(4) bearing block of pre- for step (3) blackening is fixed on plasma-arc apparatus processing lathe, by wait from
Subarc countershaft seat surface carbon dust powder carries out cladding scanning, to improve the hardness of inner hole of bearing seat to be repaired, preferred technique
Parameter is: operating current is 30a, and sweep length is 10mm, and scanning speed is 300mm/min, no overlaps, nozzle distance workpiece
8mm, is protection and ionized gas with argon, shielding gas scale of construction 15l/min, ionized gas amount 5l/min；Described plasma arc
Cladding apparatus processing lathe is four-shaft numerically controlled machining tool；
(5) prepare alloy powder, described alloy powder Ingredient percent is: c 0.3%～0.5%, cr14%～
16%th, fe 16%～18%, p 2%～2.8%, si 2.5%～3%, w 1%～3%, balance of ni, described alloyed powder
The granularity at end is 100～320 mesh, and the alloy powder preparing in proportion is put in mechanical type meal mixer, mixes 1～2 hour；
(6) alloy powder that step (5) prepares is mixed for 16:1 by weight with white glue with vinyl, stir, stirring
Alloy powder afterwards has certain viscosity and no lumps, and then equably brushes the alloy powder mixing and melts in step (4)
It is covered with the inner hole of bearing seat surface of carbon dust, dry；The thickness of precoating alloy powder is 1.5～2.5mm；
(7) by step (6) precoat alloy powder bearing block be fixed on plasma-arc apparatus processing lathe, wait from
Subarc countershaft seat surface alloy powder is scanned, and technological parameter is: operating current is 30～80a, and sweep length is 2mm,
Scanning speed is 70～200mm/min, overlapping rate 5%, nozzle distance workpiece 3mm, is protection and ionized gas with argon, protection
Gas flow 15l/min, ionized gas amount 5l/min.Cladding is 1～2mm in bearing block surface alloying layer thickness；Described grade from
Subarc cladding apparatus processing lathe is four-shaft numerically controlled machining tool；
(8) according to drawing and relevant technical requirements, grinding is carried out to bearing block；
(9) surface dye penetrant inspection is carried out to the bearing block after processing, detected whether the impact axle such as pore, slag inclusion, crackle
The defect of bearing performance, if defective, can repeat plasma-arc to fault location local；
(10) bearing block is carried out with dimensional tolerance and form and position tolerance inspection, it is qualified to check whether, finally completes decelerator and sets
Standby assembling.
The present invention compared with prior art has the advantage that
1st, process is simple, controllability is strong.
2nd, before plasma-arc alloy powder, plasma arc is adopted to pretreated inner hole of bearing seat substrate surface
Cladding pure carbon powder, improves the hardness of substrate surface, forms the gradient transition of hardness, it is to avoid directly in the soft base material of inner hole of bearing seat
Surface cladding high hardness alloy powder and crackle occurs；
3rd, repair bottom bracket substantially no to deform, the newer bearing block life-span of the bearing block after reparation is taller, technique side
Method not only economical efficiently solve using traditional handicraft reparation again after the bearing block life-span is low, poor performance the problems such as.
4th, the bearing block after repairing has good fatigue resistance, shock resistance and damping property hence it is evident that improve bearing block
Working life and reliability, the newer bearing block of its service life improves more than 1 times.
Specific embodiment
Embodiment 1:
Disassemble decelerator equipment, bearing cleaning seat, detected size first, determine bearing block damage location and wear extent, enter
Row damage inspection, according to testing result, removes bearing block surface abrasion fatigue layer 0.5mm, new machined surface；By granularity
For the pure carbon powder of 200～350 mesh and white glue with vinyl by weight mixing for 16:1, stir, using hairbrush by mixed carbon
Powder is equably brushed in bearing block substrate surface, dries, and pre- blackening thickness is 0.2mm；Pure carbon powder；Axle by pre- blackening
Bearing is fixed on the four-shaft numerically controlled machining tool of plasma-arc equipment, by plasma arc countershaft seat surface carbon dust powder
Carry out cladding scanning, to improve the hardness of inner hole of bearing seat to be repaired, technological parameter is: operating current is 30a, sweep length is
10mm, scanning speed is 300mm/min, no overlaps, nozzle distance workpiece 8mm, is protection and ionized gas with argon, shielding gas
Scale of construction 15l/min, ionized gas amount 5l/min；Alloyage powder, alloy powder Ingredient percent is: c 0.3%, cr
14%, fe 16%, p 2%, si 2.5%, w 1%, balance of ni, powder size is 100～320 mesh；Alloy powder is put
Enter in mechanical type meal mixer and be sufficiently mixed, the mixed powder time is 1 hour, and alloy powder is mixed for 16:1 by weight with white glue with vinyl
Close, stir, then equably brush the alloy powder mixing has the inner hole of bearing seat surface of carbon dust layer in cladding, dries in the air
Dry；Precoating alloy powder layer thickness is 1.5mm；The bearing block of precoating alloy powder is fixed on plasma-arc equipment four number of axle
On control machining tool, plasma arc countershaft seat surface alloy powder is scanned, and the technological parameter of plasma-arc is: work
Making electric current is 30a, and sweep length is 2mm, and scanning speed is 70mm/min, overlapping rate 5%, and nozzle distance workpiece 3mm uses argon
For protection and ionized gas, shielding gas scale of construction 15l/min, ionized gas amount 5l/min, in bearing block alloy layer clad on surface thickness
Spend for 1mm；According to drawing and relevant technical requirements, grinding is carried out to bearing block, stock removal is 0.5mm；To the axle after processing
Bearing carries out surface dye penetrant inspection, has detected whether the defects such as pore, slag inclusion, crackle；Dimensional tolerance and shape are carried out to bearing block
Position tolerance inspection, qualified after complete decelerator equipment assembling.
Embodiment 2:
Disassemble decelerator equipment, bearing cleaning seat, detected size first, determine bearing block damage location and wear extent, enter
Row damage inspection, according to testing result, removes bearing block surface abrasion fatigue layer 1mm, new machined surface；Granularity is
The pure carbon powder of 200～350 mesh and white glue with vinyl, by weight mixing for 16:1, stir, using hairbrush by mixed carbon dust
Equably brush in bearing block substrate surface, dry, pre- blackening thickness is 0.2mm；The bearing block of pre- blackening is fixed on
On the four-shaft numerically controlled machining tool of plasma-arc equipment, cladding is carried out by plasma arc countershaft seat surface alloy powder and sweeps
Retouch, to improve the hardness of inner hole of bearing seat to be repaired, technological parameter is: operating current is 30a, sweep length is 10mm, scanning
Speed is 300mm/min, no overlaps, nozzle distance workpiece 8mm, is protection and ionized gas with argon, shielding gas scale of construction 15l/
Min, ionized gas amount 5l/min；Alloyage powder, powdered ingredients mass percent is: c 0.3%, cr 14%, fe
16%, p 2%, si 2.5, w2%, balance of ni, alloy powder granularity is 100～320 mesh；Alloy powder is put into mechanical type
It is sufficiently mixed in meal mixer, the mixed powder time is 2 hours, by alloy powder with white glue with vinyl by weight mixing for 16:1, stirring is all
Even, then equably brush the alloy powder mixing has the inner hole of bearing seat surface of carbon dust layer in cladding, dries；Precoating is closed
Golden powder layer thickness is 2.5mm；The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled processing machine of plasma-arc equipment
On bed, plasma arc countershaft seat surface alloy powder is scanned, and the technological parameter of plasma-arc is: operating current is
50a, sweep length is 2mm, and scanning speed is 120mm/min, overlapping rate 5%, and nozzle distance workpiece 3mm, is protection with argon
And ionized gas, shielding gas scale of construction 15l/min, ionized gas amount 5l/min, in bearing block alloy layer clad on surface thickness it is
2mm；According to drawing and relevant technical requirements, grinding is carried out to bearing block, stock removal is 1mm；Bearing block after processing is entered
The dye penetrant inspection of row surface, has detected whether the defects such as pore, slag inclusion, crackle；Dimensional tolerance and form and position tolerance are carried out to bearing block
Inspection, qualified after complete decelerator equipment assembling.
Embodiment 3:
Disassemble decelerator equipment, bearing cleaning seat, detected size first, determine bearing block damage location and wear extent, enter
Row damage inspection, according to testing result, removes bearing block surface abrasion fatigue layer 1.5mm, new machined surface；By granularity
For the pure carbon powder of 200～350 mesh and white glue with vinyl by weight mixing for 16:1, stir, using hairbrush by mixed carbon
Powder is equably brushed in bearing block substrate surface, dries, and pre- blackening thickness is 0.2mm；The bearing block of pre- blackening is fixed
On the four-shaft numerically controlled machining tool of plasma-arc equipment, cladding is carried out by plasma arc countershaft seat surface alloy powder
Scanning, to improve the hardness of inner hole of bearing seat to be repaired, technological parameter is: operating current is 30a, and sweep length is 10mm, sweeps
Retouching speed is 300mm/min, no overlaps, nozzle distance workpiece 8mm, is protection and ionized gas with argon, the shielding gas scale of construction
15l/min, ionized gas amount 5l/min；Alloyage powder, alloy powder Ingredient percent is: c 0.4%, cr
14%, fe 16%, p 2%, si 2.5, w2.5%, balance of ni, powder size is 100～320 mesh, and alloy powder is put into
It is sufficiently mixed in mechanical type meal mixer, the mixed powder time is 2 hours, and alloy powder is mixed for 16:1 by weight with white glue with vinyl,
Stir, then equably brush the alloy powder mixing in bearing block substrate surface, dry；Precoating alloyed powder thickness
Spend for 2.5mm；By precoating alloy powder bearing block be fixed on the four-shaft numerically controlled machining tool of plasma-arc equipment, wait from
Subarc countershaft seat surface alloy powder is scanned, and the technological parameter of plasma-arc is: operating current is 50a, scanning
Width is 2mm, and scanning speed is 100mm/min, overlapping rate 5%, nozzle distance workpiece 3mm, is protection and ionization gas with argon
Body, shielding gas scale of construction 15l/min, ionized gas amount 5l/min, is 2mm in bearing block alloy layer clad on surface thickness；According to figure
Paper and relevant technical requirements carry out grinding to bearing block, and stock removal is 0.5mm；Carry out surface to the bearing block after processing
Color is detected a flaw, and has detected whether the defects such as pore, slag inclusion, crackle；Bearing block is carried out with dimensional tolerance and form and position tolerance inspection, qualified
After complete decelerator equipment assembling.
Embodiment 4:
Disassemble decelerator equipment, bearing cleaning seat, detected size first, determine bearing block damage location and wear extent, enter
Row damage inspection, according to testing result, removes bearing block surface abrasion fatigue layer 1mm, new machined surface；Granularity is
200～350 mesh pure carbon powder, are stirred by weight mixing for 16:1 with white glue with vinyl, will be equal for mixed carbon dust using hairbrush
Brush in bearing block substrate surface evenly, dry, pre- blackening thickness is 0.2mm；The bearing block of pre- blackening is fixed on
On the four-shaft numerically controlled machining tool of ion arc cladding equipment, cladding is carried out by plasma arc countershaft seat surface alloy powder and sweeps
Retouch, to improve the hardness of inner hole of bearing seat to be repaired, technological parameter is: operating current is 30a, sweep length is 10mm, scanning
Speed is 300mm/min, no overlaps, nozzle distance workpiece 8mm, is protection and ionized gas with argon, shielding gas scale of construction 15l/
Min, ionized gas amount 5l/min；Alloyage powder, powdered ingredients mass percent is: c 0.35%, cr 15%, fe
17%, p 2.5%, si 3%, w 3%, balance of ni, powder size is 100～320 mesh, and alloy powder is put into mechanical type
It is sufficiently mixed in meal mixer, the mixed powder time is 1 hour, by alloy powder with white glue with vinyl by weight mixing for 16:1, stirring is all
Even, then equably brush the alloy powder mixing has the inner hole of bearing seat surface of pure carbon powder layer in cladding, dries；Precoating
Alloy powder layer thickness is 2mm；The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled processing machine of plasma-arc equipment
On bed, plasma arc countershaft seat surface alloy powder is scanned, and the technological parameter of plasma-arc is: operating current is
40a, sweep length be 2mm, scanning speed be 90mm/min, overlapping rate 5%, nozzle distance workpiece 3mm, with argon be protection and
Ionized gas, shielding gas scale of construction 15l/min, ionized gas amount 5l/min, in bearing block alloy layer clad on surface thickness be
1.5mm；According to drawing and relevant technical requirements, grinding is carried out to bearing block, stock removal is 0.5mm；To the bearing after processing
Seat carries out surface dye penetrant inspection, has detected whether the defects such as pore, slag inclusion, crackle；Dimensional tolerance and morpheme are carried out to bearing block
Tolerance check, it is qualified to check whether, qualified after complete decelerator equipment assembling.
Embodiment 5:
Disassemble decelerator equipment, bearing cleaning seat, detected size first, determine bearing block damage location and wear extent, enter
Row damage inspection, according to testing result, removes bearing block surface abrasion fatigue layer 1mm, new machined surface；Granularity is
200～350 mesh pure carbon powder, are stirred by weight mixing for 16:1 with white glue with vinyl, will be equal for mixed carbon dust using hairbrush
Brush in bearing block substrate surface evenly, dry, pre- blackening thickness is 0.2mm；The bearing block of pre- blackening is fixed on
On the four-shaft numerically controlled machining tool of ion arc cladding equipment, cladding is carried out by plasma arc countershaft seat surface alloy powder and sweeps
Retouch, to improve the hardness of inner hole of bearing seat to be repaired, technological parameter is: operating current is 30a, sweep length is 10mm, scanning
Speed is 300mm/min, no overlaps, nozzle distance workpiece 8mm, is protection and ionized gas with argon, shielding gas scale of construction 15l/
Min, ionized gas amount 5l/min；Alloyage powder, powdered ingredients mass percent is: c 0.35%, cr 15%, fe
17%, p 2.5%, si 3%, w 2%, balance of ni, powder size is 100～320 mesh, and alloy powder is put into mechanical type
It is sufficiently mixed in meal mixer, the mixed powder time is 2 hours, by alloy powder with white glue with vinyl by weight mixing for 16:1, stirring is all
Even, then equably brush the alloy powder mixing has the inner hole of bearing seat surface of carbon dust layer in cladding, dries；Precoating is closed
Golden powder layer thickness is 2.5mm；The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled processing machine of plasma-arc equipment
On bed, plasma arc countershaft seat surface alloy powder is scanned, and the technological parameter of plasma-arc is: operating current is
30a, sweep length be 2mm, scanning speed be 70mm/min, overlapping rate 5%, nozzle distance workpiece 3mm, with argon be protection and
Ionized gas, shielding gas scale of construction 15l/min, ionized gas amount 5l/min, is 2mm in bearing block alloy layer clad on surface thickness；
According to drawing and relevant technical requirements, grinding is carried out to bearing block, stock removal is 1mm；Table is carried out to the bearing block after processing
Face colouring is detected a flaw, and has detected whether the defects such as pore, slag inclusion, crackle；Bearing block is carried out with dimensional tolerance and form and position tolerance inspection,
The assembling of decelerator equipment is completed after qualified.
Embodiment 6:
Disassemble decelerator equipment, bearing cleaning seat, detected size first, determine bearing block damage location and wear extent, enter
Row damage inspection, according to testing result, removes bearing block surface abrasion fatigue layer 1.5mm, new machined surface；By granularity
For 200～350 mesh pure carbon powder and white glue with vinyl by weight mixing for 16:1, stir, using hairbrush by mixed carbon dust
Equably brush in bearing block substrate surface, dry, pre- blackening thickness is 0.2mm；The bearing block of pre- blackening is fixed on
On the four-shaft numerically controlled machining tool of plasma-arc equipment, cladding is carried out by plasma arc countershaft seat surface alloy powder and sweeps
Retouch, to improve the hardness of inner hole of bearing seat to be repaired, technological parameter is: operating current is 30a, sweep length is 10mm, scanning
Speed is 300mm/min, no overlaps, nozzle distance workpiece 8mm, is protection and ionized gas with argon, shielding gas scale of construction 15l/
Min, ionized gas amount 5l/min；Alloyage powder, powdered ingredients mass percent is: c 0.4%, cr 15%, fe
16%, p 2.5%, si 3%, w 1%, balance of ni, powder size is 100～320 mesh, and alloy powder is put into mechanical type
It is sufficiently mixed in meal mixer, the mixed powder time is 2 hours, by alloy powder with white glue with vinyl by weight mixing for 16:1, stirring is all
Even, then equably brush the alloy powder mixing has the inner hole of bearing seat surface of carbon dust layer in cladding, dries；Precoating is closed
Golden powder layer thickness is 2.5mm；The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled processing machine of plasma-arc equipment
On bed, plasma arc countershaft seat surface alloy powder is scanned, and the technological parameter of plasma-arc is: operating current is
35a, sweep length is 2mm, and scanning speed is 100mm/min, overlapping rate 5%, and nozzle distance workpiece 3mm, is protection with argon
And ionized gas, shielding gas scale of construction 15l/min, ionized gas amount 5l/min, in bearing block alloy layer clad on surface thickness it is
2mm；According to drawing and relevant technical requirements, grinding is carried out to bearing block, stock removal is 0.5mm；To the bearing block after processing
Carry out surface dye penetrant inspection, detect whether the defects such as pore, slag inclusion, crackle；Bearing block is carried out with dimensional tolerance and morpheme is public
Difference inspection, qualified after complete decelerator equipment assembling.
Embodiment 7:
Disassemble decelerator equipment, bearing cleaning seat, detected size first, determine bearing block damage location and wear extent, enter
Row damage inspection, according to testing result, removes bearing block surface abrasion fatigue layer 0.5mm, new machined surface；By granularity
For the pure carbon powder of 200～350 mesh and white glue with vinyl by weight mixing for 16:1, stir, using hairbrush by mixed carbon
Powder is equably brushed in bearing block substrate surface, dries, and pre- blackening thickness is 0.2mm；The bearing block of pre- blackening is fixed
On the four-shaft numerically controlled machining tool of plasma-arc equipment, cladding is carried out by plasma arc countershaft seat surface alloy powder
Scanning, to improve the hardness of inner hole of bearing seat to be repaired, technological parameter is: operating current is 30a, and sweep length is 10mm, sweeps
Retouching speed is 300mm/min, no overlaps, nozzle distance workpiece 8mm, is protection and ionized gas with argon, the shielding gas scale of construction
15l/min, ionized gas amount 5l/min；Alloyage powder, powdered ingredients mass percent is: c 0.5%, cr 16%, fe
18%, p 2.8%, si 3%, w 3%, balance of ni, powder size is 100～320 mesh, and alloy powder is put into mechanical type
It is sufficiently mixed in meal mixer, the mixed powder time is 1 hour, by alloy powder with white glue with vinyl by weight mixing for 16:1, stirring is all
Even, then equably brush the alloy powder mixing has the inner hole of bearing seat surface of carbon dust layer in cladding, dries；Precoating is closed
Golden powder layer thickness is 1.5mm；The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled processing machine of plasma-arc equipment
On bed, plasma arc countershaft seat surface alloy powder is scanned, and the technological parameter of plasma-arc is: operating current is
80a, sweep length is 2mm, and scanning speed is 200mm/min, overlapping rate 5%, and nozzle distance workpiece 3mm, is protection with argon
And ionized gas, shielding gas scale of construction 15l/min, ionized gas amount 5l/min, in bearing block alloy layer clad on surface thickness it is
1mm；According to drawing and relevant technical requirements, grinding is carried out to bearing block, stock removal is 0.5mm；To the bearing block after processing
Carry out surface dye penetrant inspection, detect whether the defects such as pore, slag inclusion, crackle；Bearing block is carried out with dimensional tolerance and morpheme is public
Difference inspection, qualified after complete decelerator equipment assembling.
Embodiment 8:
Disassemble decelerator equipment, bearing cleaning seat, detected size first, determine bearing block damage location and wear extent, enter
Row damage inspection, according to testing result, removes bearing block surface abrasion fatigue layer 1mm, new machined surface；Granularity is
200～350 mesh pure carbon powder, stir by weight mixing for 16:1 with white glue with vinyl, using hairbrush by mixed carbon dust
Equably brush in bearing block substrate surface, dry, pre- blackening thickness is 0.2mm；The bearing block of pre- blackening is fixed on
On the four-shaft numerically controlled machining tool of plasma-arc equipment, cladding is carried out by plasma arc countershaft seat surface alloy powder and sweeps
Retouch, to improve the hardness of inner hole of bearing seat to be repaired, technological parameter is: operating current is 30a, sweep length is 10mm, scanning
Speed is 300mm/min, no overlaps, nozzle distance workpiece 8mm, is protection and ionized gas with argon, shielding gas scale of construction 15l/
Min, ionized gas amount 5l/min；Alloyage powder, powdered ingredients mass percent is: c 0.5%, cr 16%, fe
18%, p 2.8%, si 3%, w 3%, balance of ni, powder size is 100～320 mesh, and alloy powder is put into mechanical type
It is sufficiently mixed in meal mixer, the mixed powder time is 2 hours, by alloy powder with white glue with vinyl by weight mixing for 16:1, stirring is all
Even, then equably brush the alloy powder mixing has the inner hole of bearing seat surface of carbon dust layer in cladding, dries；Precoating is closed
Golden powder layer thickness is 2.5mm；The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled processing machine of plasma-arc equipment
On bed, plasma arc countershaft seat surface alloy powder is scanned, and the technological parameter of plasma-arc is: operating current is
50a, sweep length is 2mm, and scanning speed is 100mm/min, overlapping rate 5%, and nozzle distance workpiece 3mm, is protection with argon
And ionized gas, shielding gas scale of construction 15l/min, ionized gas amount 5l/min, in bearing block alloy layer clad on surface thickness it is
2mm；According to drawing and relevant technical requirements, grinding is carried out to bearing block, stock removal is 1mm；Bearing block after processing is entered
The dye penetrant inspection of row surface, has detected whether the defects such as pore, slag inclusion, crackle；Dimensional tolerance and form and position tolerance are carried out to bearing block
Inspection, qualified after complete decelerator equipment assembling.
Claims (4)
1. a kind of restorative procedure of reducer shaft bearing is it is characterised in that it comprises the following steps:
(1) disassemble decelerator, bearing cleaning seat, the dust on removal bearing block, greasy dirt, corrosion, then detected size, determine axle
The abrading section of bearing and wear extent；
(2) according to testing result, remove the fretting fatigue layer of bearing block, so that new machined surface to occur；
(3) pure carbon powder is mixed for 16:1 by weight with white glue with vinyl, stir, will be uniform for mixed carbon dust using hairbrush
Ground brushing, in bearing block substrate surface, is dried, and pre- blackening thickness is 0.2mm；
(4) bearing block of pre- for step (3) blackening is fixed on plasma-arc apparatus processing lathe, by plasma arc
Countershaft seat surface carbon dust powder carries out cladding scanning, and to improve the hardness of inner hole of bearing seat to be repaired, technological parameter is: work
Electric current is 30a, and sweep length is 10mm, and scanning speed is 300mm/min, no overlaps, nozzle distance workpiece 8mm, with argon is
Protection and ionized gas, shielding gas scale of construction 15l/min, ionized gas amount 5l/min；
(5) prepare alloy powder, described alloy powder Ingredient percent is: c 0.3%～0.5%, cr14%～16%,
Fe 16%～18%, p 2%～2.8%, si 2.5%～3%, w 1%～3%, balance of ni, the grain of described alloy powder
Spend for 100～320 mesh, the alloy powder preparing in proportion is put in mechanical type meal mixer, mix 1～2 hour；
(6) alloy powder that step (5) prepares is mixed for 16:1 by weight with white glue with vinyl, stir, after stirring
Alloy powder has certain viscosity and no lumps, and then equably brushing the alloy powder mixing has in step (4) cladding
The inner hole of bearing seat surface of carbon dust, dries；The thickness of precoating alloy powder is 1.5～2.5mm；
(7) bearing block that step (6) is precoated alloy powder is fixed on plasma-arc apparatus processing lathe, plasma arc
Countershaft seat surface alloy powder is scanned, and technological parameter is: operating current is 30～80a, and sweep length is 2mm, scanning
Speed is 70～200mm/min, overlapping rate 5%, nozzle distance workpiece 3mm, is protection and ionized gas with argon, protective gas
Amount 15l/min, ionized gas amount 5l/min, cladding is 1～2mm in bearing block surface alloying layer thickness；
(8) according to drawing and relevant technical requirements, grinding is carried out to bearing block；
(9) surface dye penetrant inspection is carried out to the bearing block after processing, detected whether pore, slag inclusion, cracks influence bearing block
The defect of energy, if defective, can repeat plasma-arc to fault location local；
(10) bearing block is carried out with dimensional tolerance and form and position tolerance inspection, it is qualified to check whether, finally completes decelerator equipment group
Dress.
2. reducer shaft bearing according to claim 1 restorative procedure it is characterised in that: described remove bearing block mill
Damage fatigue layer thickness is 0.5～1.5mm.
3. reducer shaft bearing according to claim 1 restorative procedure it is characterised in that: the granularity of described pure carbon powder is
200～350 mesh.
4. reducer shaft bearing according to claim 1 restorative procedure it is characterised in that: described plasma-arc
Apparatus processing lathe is four-shaft numerically controlled machining tool.
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| CN201410646019.3A CN104308451B (en) | 2014-11-14 | 2014-11-14 | Speed reducer bearing block repair method |
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| CN104308451A CN104308451A (en) | 2015-01-28 |
| CN104308451B true CN104308451B (en) | 2017-01-18 |
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| CN106695239B (en) * | 2015-11-18 | 2019-03-15 | 上海宝冶集团有限公司 | Acid rolls mandrel of uncoiler Disintegration overhaul method |
| CN106239026A (en) * | 2016-08-18 | 2016-12-21 | 卢志旭 | A kind of restorative procedure of chain nest abrasion sprocket wheel |
| CN107723700A (en) * | 2017-08-23 | 2018-02-23 | 韩传怀 | A kind of restorative procedure to run out bearing |
| CN109210182A (en) * | 2018-08-27 | 2019-01-15 | 贺煜 | A kind of oil leak of reducer processing method |
| CN110370091A (en) * | 2019-06-05 | 2019-10-25 | 攀枝花市力天工贸有限责任公司 | A kind of Repair gene method of rolling bearing |
| 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 |
| CN114345942A (en) * | 2022-01-24 | 2022-04-15 | 上海鼎艺冶金科技有限公司 | Method for repairing bearing seat lining plate mounting surface on line based on laser tracker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6267182A (en) * | 1985-09-20 | 1987-03-26 | Mitsubishi Motors Corp | Remelting and alloying method for metallic surface |
| CN102031519B (en) * | 2011-01-12 | 2012-01-11 | 唐山瑞兆激光技术机械修复有限公司 | Laser repair method for abraded centrifugal fan bearing block |
| CN102560475B (en) * | 2011-12-22 | 2013-08-21 | 山西潞安环保能源开发股份有限公司 | Cladding method of alloy powder material |
| CN102785055B (en) * | 2012-08-01 | 2015-06-24 | 天津钢铁集团有限公司 | Method for repairing bearing hole in bracket of steelmaking converter tilting mechanism |
| CN102925889A (en) * | 2012-10-12 | 2013-02-13 | 秦皇岛格瑞得节能技术服务有限公司 | Plasma arc cladding repairing method of coupling half inner bore |
| CN102912276A (en) * | 2012-10-15 | 2013-02-06 | 秦皇岛格瑞得节能技术服务有限公司 | Plasma arc fusion covering repair method for continuous casting rollers |
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