CN104308451A - Speed reducer bearing block repair method - Google Patents
Speed reducer bearing block repair method Download PDFInfo
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- CN104308451A CN104308451A CN201410646019.3A CN201410646019A CN104308451A CN 104308451 A CN104308451 A CN 104308451A CN 201410646019 A CN201410646019 A CN 201410646019A CN 104308451 A CN104308451 A CN 104308451A
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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 a kind of restorative procedure of reducer shaft bearing.
Background technology
Decelerator is the important drive apparatus of the widely used one of industrial circle.Decelerator is in Long-Time Service process, due to factors such as working condition is severe, metal fatigue, wearing and tearing, easily there is heating at bearing block position, make sound and leakage of oil situation, even there is bearing " outer ring rotating " phenomenon, as repaired not in time, have a strong impact on the safe operation of decelerator, cause production accident.
Because bearing material intensity is high, hardness is large, and running accuracy is high, requires that reducer shaft bearing materials hardness is moderate, shock resistance and damping property good.Reducer shaft bearing mainly adopts casting pig, and solderability is poor, easily produces white structure, pore and crackle during welding, and conventional soldering method is not suitable for prosthesis shaft bearing.
At present, reducer shaft bearing mainly contains two kinds of restorative procedures: one adopts bushing method, between the bearing block and bearing of wearing and tearing, add cover, but the method shortcoming is obvious, cover is too small with bearing clearance, easily causes bearing heating, otherwise easily make bearing landing, and it is restricted to repair number of times; The second adopts brazing process, but the method complex process, long in time limit, cost is high, and copper alloy is softer, generation scaling easy to wear after repairing, and causes bearing to produce eccentric wear and fever phenomenon.Above-mentioned recovery technique cannot meet industrial and mining enterprises for the reducer shaft bearing long-life after repairing, high-quality requirement, in the urgent need to a kind of low energy consumption, low cost, environmental protection, high life, restorative procedure that process controllability is strong.
Summary of the invention
The object of the present invention is to provide that a kind of technique is simple, controllability by force, by repairing number of times restriction, the restorative procedure of the reducer shaft bearing in bearing block service life can be improved.Reducer shaft bearing after the present invention mainly adopts the reparation of plasma-arc method to wear and tear.
Technical scheme of the present invention comprises the following steps:
(1) disassemble decelerator, bearing cleaning seat, remove dust, greasy dirt, corrosion etc. on bearing block, then detect size, determine abrading section and the wear extent of bearing block;
(2) according to testing result, remove the fretting fatigue layer of bearing block, be generally 0.5 ~ 1.5mm, there is new machined surface;
(3) pure carbon powder mixed by weight for 16:1 with white glue with vinyl, stir, adopt hairbrush to brush mixed carbon dust at bearing block substrate surface equably, dry, pre-blackening thickness is 0.2mm; The granularity of described pure carbon powder is 200 ~ 350 orders;
(4) bearing block of pre-for step (3) blackening is fixed on plasma-arc equipment machining tool, by plasma arc, cladding scanning is carried out to bearing block surface carbon dust powder, to improve the hardness of inner hole of bearing seat to be repaired, preferred technological parameter is: operating current is 30A, and sweep length is 10mm, sweep speed is 300mm/min, without overlap joint, nozzle distance workpiece 8mm is protection and ionized gas with argon gas, protective gas amount 15L/min, ionized gas amount 5L/min; Described plasma-arc equipment machining tool is four-shaft numerically controlled machining tool;
(5) alloy powder is prepared, 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%, surplus are Ni, the granularity of described alloy powder is 100 ~ 320 orders, the alloy powder prepared in proportion is put into mechanical type meal mixer, mixes 1 ~ 2 hour;
(6) alloy powder step (5) prepared mixes by weight for 16:1 with white glue with vinyl, stir, alloy powder after stirring has certain viscosity and without caking, then the alloy powder mixed is brushed equably the inner hole of bearing seat surface having carbon dust in step (4) cladding, dry; The thickness of precoating alloy powder is 1.5 ~ 2.5mm;
(7) bearing block of step (6) precoating alloy powder is fixed on plasma-arc equipment machining tool; plasma arc scans bearing block surface alloy powder; technological parameter is: operating current is 30 ~ 80A; sweep length is 2mm, and sweep speed is 70 ~ 200mm/min, overlapping rate 5%; nozzle distance workpiece 3mm; with argon gas be protection and ionized gas, protective gas amount 15L/min, ionized gas amount 5L/min.Cladding is 1 ~ 2mm at bearing block surface alloy layer thickness; Described plasma-arc equipment machining tool is four-shaft numerically controlled machining tool;
(8) require to carry out grinding to bearing block according to drawing and relevant technologies;
(9) surface colour flaw detection is carried out to the bearing block after processing, detect and whether have pore, slag inclusion, crackle etc. to affect the defect of bearing block performance, if defectiveness, plasma-arc can be repeated to fault location local;
(10) carrying out dimensional tolerance and form and position tolerance inspection to bearing block, whether qualified, finally complete decelerator device assembles if checking.
The present invention compared with prior art tool has the following advantages:
1, technique is simple, and controllability is strong.
2, before plasma-arc alloy powder, plasma-arc pure carbon powder is adopted to pretreated inner hole of bearing seat substrate surface, improve the hardness of substrate surface, form the gradient transition of hardness, avoid directly occurring crackle at inner hole of bearing seat soft substrate surface cladding high hardness alloy powder;
3, repair bottom bracket substantially without distortion, the newer bearing block life-span of the bearing block after reparation is taller, and process is the problem such as economy but also the bearing block life-span after efficiently solving the reparation of employing traditional handicraft is low, poor performance not only.
4, the bearing block after repairing has good fatigue resistance, shock resistance and damping property, and significantly improve working life and the reliability of bearing block, its service life, newer bearing block improved more than 1 times.
Detailed description of the invention
Embodiment 1:
First disassemble decelerator equipment, bearing cleaning seat, detect size, determine bearing block damage location and wear extent, carry out damage inspection, according to testing result, remove bearing block surface abrasion fatigue layer 0.5mm, there is new machined surface; Be that 200 ~ 350 object pure carbon powder mix by weight for 16:1 with white glue with vinyl by granularity, stir, adopt hairbrush to brush mixed carbon dust at bearing block substrate surface equably, dry, pre-blackening thickness is 0.2mm; Pure carbon powder; The bearing block of pre-blackening is fixed on the four-shaft numerically controlled machining tool of plasma-arc equipment, by plasma arc, cladding scanning is carried out to bearing block surface carbon dust powder, 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, sweep speed is 300mm/min, without overlap joint, nozzle distance workpiece 8mm is protection and ionized gas with argon gas, protective gas amount 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%, and surplus is Ni, and powder size is 100 ~ 320 orders; Alloy powder is put into mechanical type meal mixer fully to mix, the mixed powder time is 1 hour, is mixed by alloy powder, stir with white glue with vinyl by weight for 16:1, then the alloy powder mixed is brushed equably the inner hole of bearing seat surface having carbon dust layer in cladding, dry; Precoating alloy powder layer thickness is 1.5mm; The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled machining tool of plasma-arc equipment, plasma arc scans bearing block surface alloy powder, the technological parameter of plasma-arc is: operating current is 30A, and sweep length is 2mm, and sweep speed is 70mm/min, overlapping rate 5%, nozzle distance workpiece 3mm is protection and ionized gas with argon gas, protective gas amount 15L/min, ionized gas amount 5L/min is 1mm at bearing block alloy layer clad on surface thickness; Require to carry out grinding to bearing block according to drawing and relevant technologies, stock removal is 0.5mm; Surface colour flaw detection is carried out to the bearing block after processing, detects whether there are the defects such as pore, slag inclusion, crackle; Dimensional tolerance and form and position tolerance inspection are carried out to bearing block, after qualified, completes decelerator device assembles.
Embodiment 2:
First disassemble decelerator equipment, bearing cleaning seat, detect size, determine bearing block damage location and wear extent, carry out damage inspection, according to testing result, remove bearing block surface abrasion fatigue layer 1mm, there is new machined surface; Be that 200 ~ 350 object pure carbon powder mix by weight for 16:1 with white glue with vinyl by granularity, stir, adopt hairbrush to brush mixed carbon dust at bearing block substrate surface equably, dry, 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, by plasma arc, cladding scanning is carried out to bearing block surface alloy powder, 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, sweep speed is 300mm/min, without overlap joint, nozzle distance workpiece 8mm is protection and ionized gas with argon gas, protective gas amount 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%, and surplus is Ni, and alloy powder granularity is 100 ~ 320 orders; Alloy powder is put into mechanical type meal mixer fully to mix, the mixed powder time is 2 hours, is mixed by alloy powder, stir with white glue with vinyl by weight for 16:1, then the alloy powder mixed is brushed equably the inner hole of bearing seat surface having carbon dust layer in cladding, dry; Precoating alloy powder layer thickness is 2.5mm; The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled machining tool of plasma-arc equipment, plasma arc scans bearing block surface alloy powder, the technological parameter of plasma-arc is: operating current is 50A, and sweep length is 2mm, and sweep speed is 120mm/min, overlapping rate 5%, nozzle distance workpiece 3mm is protection and ionized gas with argon gas, protective gas amount 15L/min, ionized gas amount 5L/min is 2mm at bearing block alloy layer clad on surface thickness; Require to carry out grinding to bearing block according to drawing and relevant technologies, stock removal is 1mm; Surface colour flaw detection is carried out to the bearing block after processing, detects whether there are the defects such as pore, slag inclusion, crackle; Dimensional tolerance and form and position tolerance inspection are carried out to bearing block, after qualified, completes decelerator device assembles.
Embodiment 3:
First disassemble decelerator equipment, bearing cleaning seat, detect size, determine bearing block damage location and wear extent, carry out damage inspection, according to testing result, remove bearing block surface abrasion fatigue layer 1.5mm, there is new machined surface; Be that 200 ~ 350 object pure carbon powder mix by weight for 16:1 with white glue with vinyl by granularity, stir, adopt hairbrush to brush mixed carbon dust at bearing block substrate surface equably, dry, 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, by plasma arc, cladding scanning is carried out to bearing block surface alloy powder, 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, sweep speed is 300mm/min, without overlap joint, nozzle distance workpiece 8mm is protection and ionized gas with argon gas, protective gas amount 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%, surplus is Ni, and powder size is 100 ~ 320 orders, alloy powder is put into mechanical type meal mixer fully to mix, the mixed powder time is 2 hours, is mixed by alloy powder, stir with white glue with vinyl by weight for 16:1, then the alloy powder mixed is brushed equably at bearing block substrate surface, dry; Precoating alloy powder layer thickness is 2.5mm; The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled machining tool of plasma-arc equipment, plasma arc scans bearing block surface alloy powder, the technological parameter of plasma-arc is: operating current is 50A, and sweep length is 2mm, and sweep speed is 100mm/min, overlapping rate 5%, nozzle distance workpiece 3mm is protection and ionized gas with argon gas, protective gas amount 15L/min, ionized gas amount 5L/min is 2mm at bearing block alloy layer clad on surface thickness; Require to carry out grinding to bearing block according to drawing and relevant technologies, stock removal is 0.5mm; Surface colour flaw detection is carried out to the bearing block after processing, detects whether there are the defects such as pore, slag inclusion, crackle; Dimensional tolerance and form and position tolerance inspection are carried out to bearing block, after qualified, completes decelerator device assembles.
Embodiment 4:
First disassemble decelerator equipment, bearing cleaning seat, detect size, determine bearing block damage location and wear extent, carry out damage inspection, according to testing result, remove bearing block surface abrasion fatigue layer 1mm, there is new machined surface; Be that 200 ~ 350 order pure carbon powder mix by weight for 16:1 with white glue with vinyl by granularity, stir, adopt hairbrush to brush mixed carbon dust at bearing block substrate surface equably, dry, 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, by plasma arc, cladding scanning is carried out to bearing block surface alloy powder, 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, sweep speed is 300mm/min, without overlap joint, nozzle distance workpiece 8mm is protection and ionized gas with argon gas, protective gas amount 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%, surplus is Ni, and powder size is 100 ~ 320 orders, alloy powder is put into mechanical type meal mixer fully to mix, the mixed powder time is 1 hour, is mixed by alloy powder, stir with white glue with vinyl by weight for 16:1, then the alloy powder mixed is brushed equably the inner hole of bearing seat surface having pure carbon powder layer in cladding, dry; Precoating alloy powder layer thickness is 2mm; The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled machining tool of plasma-arc equipment, plasma arc scans bearing block surface alloy powder, the technological parameter of plasma-arc is: operating current is 40A, and sweep length is 2mm, and sweep speed is 90mm/min, overlapping rate 5%, nozzle distance workpiece 3mm is protection and ionized gas with argon gas, protective gas amount 15L/min, ionized gas amount 5L/min is 1.5mm at bearing block alloy layer clad on surface thickness; Require to carry out grinding to bearing block according to drawing and relevant technologies, stock removal is 0.5mm; Surface colour flaw detection is carried out to the bearing block after processing, detects whether there are the defects such as pore, slag inclusion, crackle; Carrying out dimensional tolerance and form and position tolerance inspection to bearing block, whether qualified, complete decelerator device assembles after qualified if checking.
Embodiment 5:
First disassemble decelerator equipment, bearing cleaning seat, detect size, determine bearing block damage location and wear extent, carry out damage inspection, according to testing result, remove bearing block surface abrasion fatigue layer 1mm, there is new machined surface; Be that 200 ~ 350 order pure carbon powder mix by weight for 16:1 with white glue with vinyl by granularity, stir, adopt hairbrush to brush mixed carbon dust at bearing block substrate surface equably, dry, 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, by plasma arc, cladding scanning is carried out to bearing block surface alloy powder, 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, sweep speed is 300mm/min, without overlap joint, nozzle distance workpiece 8mm is protection and ionized gas with argon gas, protective gas amount 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%, surplus is Ni, and powder size is 100 ~ 320 orders, alloy powder is put into mechanical type meal mixer fully to mix, the mixed powder time is 2 hours, is mixed by alloy powder, stir with white glue with vinyl by weight for 16:1, then the alloy powder mixed is brushed equably the inner hole of bearing seat surface having carbon dust layer in cladding, dry; Precoating alloy powder layer thickness is 2.5mm; The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled machining tool of plasma-arc equipment, plasma arc scans bearing block surface alloy powder, the technological parameter of plasma-arc is: operating current is 30A, and sweep length is 2mm, and sweep speed is 70mm/min, overlapping rate 5%, nozzle distance workpiece 3mm is protection and ionized gas with argon gas, protective gas amount 15L/min, ionized gas amount 5L/min is 2mm at bearing block alloy layer clad on surface thickness; Require to carry out grinding to bearing block according to drawing and relevant technologies, stock removal is 1mm; Surface colour flaw detection is carried out to the bearing block after processing, detects whether there are the defects such as pore, slag inclusion, crackle; Dimensional tolerance and form and position tolerance inspection are carried out to bearing block, after qualified, completes decelerator device assembles.
Embodiment 6:
First disassemble decelerator equipment, bearing cleaning seat, detect size, determine bearing block damage location and wear extent, carry out damage inspection, according to testing result, remove bearing block surface abrasion fatigue layer 1.5mm, there is new machined surface; Be that 200 ~ 350 order pure carbon powder mix by weight for 16:1 with white glue with vinyl by granularity, stir, adopt hairbrush to brush mixed carbon dust at bearing block substrate surface equably, dry, 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, by plasma arc, cladding scanning is carried out to bearing block surface alloy powder, 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, sweep speed is 300mm/min, without overlap joint, nozzle distance workpiece 8mm is protection and ionized gas with argon gas, protective gas amount 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%, surplus is Ni, and powder size is 100 ~ 320 orders, alloy powder is put into mechanical type meal mixer fully to mix, the mixed powder time is 2 hours, is mixed by alloy powder, stir with white glue with vinyl by weight for 16:1, then the alloy powder mixed is brushed equably the inner hole of bearing seat surface having carbon dust layer in cladding, dry; Precoating alloy powder layer thickness is 2.5mm; The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled machining tool of plasma-arc equipment, plasma arc scans bearing block surface alloy powder, the technological parameter of plasma-arc is: operating current is 35A, and sweep length is 2mm, and sweep speed is 100mm/min, overlapping rate 5%, nozzle distance workpiece 3mm is protection and ionized gas with argon gas, protective gas amount 15L/min, ionized gas amount 5L/min is 2mm at bearing block alloy layer clad on surface thickness; Require to carry out grinding to bearing block according to drawing and relevant technologies, stock removal is 0.5mm; Surface colour flaw detection is carried out to the bearing block after processing, detects whether there are the defects such as pore, slag inclusion, crackle; Dimensional tolerance and form and position tolerance inspection are carried out to bearing block, after qualified, completes decelerator device assembles.
Embodiment 7:
First disassemble decelerator equipment, bearing cleaning seat, detect size, determine bearing block damage location and wear extent, carry out damage inspection, according to testing result, remove bearing block surface abrasion fatigue layer 0.5mm, there is new machined surface; Be that 200 ~ 350 object pure carbon powder mix by weight for 16:1 with white glue with vinyl by granularity, stir, adopt hairbrush to brush mixed carbon dust at bearing block substrate surface equably, dry, 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, by plasma arc, cladding scanning is carried out to bearing block surface alloy powder, 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, sweep speed is 300mm/min, without overlap joint, nozzle distance workpiece 8mm is protection and ionized gas with argon gas, protective gas amount 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%, surplus is Ni, and powder size is 100 ~ 320 orders, alloy powder is put into mechanical type meal mixer fully to mix, the mixed powder time is 1 hour, is mixed by alloy powder, stir with white glue with vinyl by weight for 16:1, then the alloy powder mixed is brushed equably the inner hole of bearing seat surface having carbon dust layer in cladding, dry; Precoating alloy powder layer thickness is 1.5mm; The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled machining tool of plasma-arc equipment, plasma arc scans bearing block surface alloy powder, the technological parameter of plasma-arc is: operating current is 80A, and sweep length is 2mm, and sweep speed is 200mm/min, overlapping rate 5%, nozzle distance workpiece 3mm is protection and ionized gas with argon gas, protective gas amount 15L/min, ionized gas amount 5L/min is 1mm at bearing block alloy layer clad on surface thickness; Require to carry out grinding to bearing block according to drawing and relevant technologies, stock removal is 0.5mm; Surface colour flaw detection is carried out to the bearing block after processing, detects whether there are the defects such as pore, slag inclusion, crackle; Dimensional tolerance and form and position tolerance inspection are carried out to bearing block, after qualified, completes decelerator device assembles.
Embodiment 8:
First disassemble decelerator equipment, bearing cleaning seat, detect size, determine bearing block damage location and wear extent, carry out damage inspection, according to testing result, remove bearing block surface abrasion fatigue layer 1mm, there is new machined surface; Be that 200 ~ 350 order pure carbon powder mix by weight for 16:1 with white glue with vinyl by granularity, stir, adopt hairbrush to brush mixed carbon dust at bearing block substrate surface equably, dry, 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, by plasma arc, cladding scanning is carried out to bearing block surface alloy powder, 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, sweep speed is 300mm/min, without overlap joint, nozzle distance workpiece 8mm is protection and ionized gas with argon gas, protective gas amount 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%, surplus is Ni, and powder size is 100 ~ 320 orders, alloy powder is put into mechanical type meal mixer fully to mix, the mixed powder time is 2 hours, is mixed by alloy powder, stir with white glue with vinyl by weight for 16:1, then the alloy powder mixed is brushed equably the inner hole of bearing seat surface having carbon dust layer in cladding, dry; Precoating alloy powder layer thickness is 2.5mm; The bearing block of precoating alloy powder is fixed on the four-shaft numerically controlled machining tool of plasma-arc equipment, plasma arc scans bearing block surface alloy powder, the technological parameter of plasma-arc is: operating current is 50A, and sweep length is 2mm, and sweep speed is 100mm/min, overlapping rate 5%, nozzle distance workpiece 3mm is protection and ionized gas with argon gas, protective gas amount 15L/min, ionized gas amount 5L/min is 2mm at bearing block alloy layer clad on surface thickness; Require to carry out grinding to bearing block according to drawing and relevant technologies, stock removal is 1mm; Surface colour flaw detection is carried out to the bearing block after processing, detects whether there are the defects such as pore, slag inclusion, crackle; Dimensional tolerance and form and position tolerance inspection are carried out to bearing block, after qualified, completes decelerator device assembles.
Claims (5)
1. a restorative procedure for reducer shaft bearing, is characterized in that, it comprises the following steps:
(1) disassemble decelerator, bearing cleaning seat, remove dust, greasy dirt, corrosion etc. on bearing block, then detect size, determine abrading section and the wear extent of bearing block;
(2) according to testing result, the fretting fatigue layer of bearing block is removed, there is new machined surface;
(3) pure carbon powder mixed by weight for 16:1 with white glue with vinyl, stir, adopt hairbrush to brush mixed carbon dust at bearing block substrate surface equably, dry, pre-blackening thickness is 0.2mm;
(4) bearing block of pre-for step (3) blackening is fixed on plasma-arc equipment machining tool, by plasma arc, cladding scanning is carried out to bearing block surface carbon dust powder, to improve the hardness of inner hole of bearing seat to be repaired, preferred technological parameter is: operating current is 30A, and sweep length is 10mm, sweep speed is 300mm/min, without overlap joint, nozzle distance workpiece 8mm is protection and ionized gas with argon gas, protective gas amount 15L/min, ionized gas amount 5L/min;
(5) alloy powder is prepared, described alloy powder Ingredient percent is: C 0.3% ~ 0.5%, Cr 14% ~ 16%, Fe 16% ~ 18%, P 2% ~ 2.8%, Si 2.5% ~ 3%, W 1% ~ 3%, surplus are Ni, the granularity of described alloy powder is 100 ~ 320 orders, the alloy powder prepared in proportion is put into mechanical type meal mixer, mixes 1 ~ 2 hour;
(6) alloy powder step (5) prepared mixes by weight for 16:1 with white glue with vinyl, stir, alloy powder after stirring has certain viscosity and without caking, then the alloy powder mixed is brushed equably the inner hole of bearing seat surface having carbon dust in step (4) cladding, dry; The thickness of precoating alloy powder is 1.5 ~ 2.5mm;
(7) bearing block of step (6) precoating alloy powder is fixed on plasma-arc equipment machining tool; plasma arc scans bearing block surface alloy powder; technological parameter is: operating current is 30 ~ 80A; sweep length is 2mm, and sweep speed is 70 ~ 200mm/min, overlapping rate 5%; nozzle distance workpiece 3mm; with argon gas be protection and ionized gas, protective gas amount 15L/min, ionized gas amount 5L/min.Cladding is 1 ~ 2mm at bearing block surface alloy layer thickness;
(8) require to carry out grinding to bearing block according to drawing and relevant technologies;
(9) surface colour flaw detection is carried out to the bearing block after processing, detect and whether have pore, slag inclusion, crackle etc. to affect the defect of bearing block performance, if defectiveness, plasma-arc can be repeated to fault location local;
(10) carrying out dimensional tolerance and form and position tolerance inspection to bearing block, whether qualified, finally complete decelerator device assembles if checking.
2. the restorative procedure of reducer shaft bearing according to claim 1, is characterized in that: described removal carrier wear fatigue layer thickness, is generally 0.5 ~ 1.5mm.
3. the restorative procedure of reducer shaft bearing according to claim 1, is characterized in that: the granularity of described pure carbon powder is 200 ~ 350 orders.
4. the restorative procedure of reducer shaft bearing according to claim 1, is characterized in that: the granularity of described alloy powder is 100 ~ 320 orders.
5. the restorative procedure of reducer shaft bearing according to claim 1, is characterized in that: described plasma-arc equipment machining tool 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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| CN201410646019.3A CN104308451B (en) | 2014-11-14 | 2014-11-14 | Speed reducer bearing block repair method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106239026A (en) * | 2016-08-18 | 2016-12-21 | 卢志旭 | A kind of restorative procedure of chain nest abrasion sprocket wheel |
| CN106695239A (en) * | 2015-11-18 | 2017-05-24 | 上海宝冶集团有限公司 | Disassembling overhauling method of mandrel of pickling-rolling uncoiling machine |
| 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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| CN106695239A (en) * | 2015-11-18 | 2017-05-24 | 上海宝冶集团有限公司 | Disassembling overhauling method of mandrel of pickling-rolling uncoiling machine |
| 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 |
| CN114345942B (en) * | 2022-01-24 | 2024-05-07 | 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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