CN110561029A - Method for repairing bearing hole of speed reducer shell - Google Patents
Method for repairing bearing hole of speed reducer shell Download PDFInfo
- Publication number
- CN110561029A CN110561029A CN201910826371.8A CN201910826371A CN110561029A CN 110561029 A CN110561029 A CN 110561029A CN 201910826371 A CN201910826371 A CN 201910826371A CN 110561029 A CN110561029 A CN 110561029A
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- CN
- China
- Prior art keywords
- bearing hole
- speed reducer
- stage
- tolerance
- reducer shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
Abstract
the invention discloses a method for repairing a bearing hole of a speed reducer shell, which comprises an early-stage treatment stage, a comprehensive cleaning stage, a photographing stage and a nondestructive inspection stage; a detection stage, dimension tolerance, form and position tolerance detection and surface hardness test; in the processing stage, the damaged and out-of-tolerance bearing hole of the speed reducer is mechanically processed, and the surface fatigue layer is removed; in the inspection and analysis stage, the material of the body needs to be inspected and analyzed, and a material close to the material of the matrix is selected as a melting material; in the cladding stage, a cladding layer is formed on the surface of the machined hole; and in the reprocessing stage, the holes after cladding are reprocessed to meet the required dimensional tolerance, form and position tolerance, surface roughness and Indian requirements. The invention provides a method for repairing a bearing hole of a speed reducer shell, which realizes the out-of-tolerance repair of the bearing hole of the speed reducer shell, reduces the rejection rate of the speed reducer shell, reduces the production cost, reduces the resource waste and improves the economic benefit and the social benefit of enterprises.
Description
Technical Field
The invention relates to a method for repairing a bearing hole of a speed reducer shell, and relates to the technical field of cladding.
background
The speed reducer is one of main devices of enterprises, a transmission shaft and a transmission gear are seriously damaged once a fit clearance occurs in the operation process, local friction damage of a transmission part is easily caused due to the reasons of high power, high use frequency, working environment and the like of the speed reducer, particularly, after a bearing seat of the speed reducer works for a long time, the bearing hole is easily worn and cannot be normally used due to high strength and high hardness of a bearing metal material, and the bearing hole needs to be repaired; when the existing electroplating brush repairing technology is used for repairing a bearing hole with small abrasion, the repairing effect is good, but the on-site repairing is difficult to realize, and when the repairing thickness exceeds 0.3mm, the repairing effect is not good, and the shedding phenomenon is easy to occur; the existing spraying repair technology is suitable for repairing parts with large abrasion loss, but the repair method is complex and has a long period. In case the dead eye of reduction gear housing appears wearing and tearing, causes scrapping of whole platform reduction gear, changes the part, and the change expense is high, and the manufacturing cycle is long, and the enterprise will suffer huge economic loss.
The present invention therefore proposes a further solution to the above-mentioned problem. Looking up documents, no method for repairing the bearing hole of the speed reducer shell exists in the market at present.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for repairing a bearing hole of a speed reducer shell, which realizes the out-of-tolerance repair of the bearing hole of the speed reducer shell, and has long service cycle and high reliability after repair.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for repairing a bearing hole of a speed reducer shell comprises the following steps:
(1) Pretreatment of
The method comprises the steps of cleaning rust and oil stains around a bearing hole of a reducer shell comprehensively, taking a picture, and carrying out nondestructive inspection, wherein the nondestructive inspection is to give information such as the size, the position, the property and the quantity of defects without damaging or influencing whether the defects or the nonuniformity exist in an inspected object or not by utilizing the characteristics of sound, light, magnetism, electricity and the like of substances.
(2) Detection of
Dimensional tolerance, form and position tolerance detection, surface hardness test, recording and mapping.
(3) Machining
And (4) machining the damaged and out-of-tolerance bearing hole of the speed reducer to remove the surface fatigue layer.
(4) Assay analysis
And (4) inspecting and analyzing the material of the machine body, and selecting the material similar to the material of the machine body as a melting material.
(5) Cladding
Cladding the machined bearing hole, wherein the cladding surface is 2-3 mm higher than the reference surface, and a machining allowance is reserved. The cladding technology is a process method which is characterized in that a selected coating material is placed on the surface of a coated substrate in different filling modes, the selected coating material is simultaneously melted with a thin layer on the surface of the substrate through irradiation, and the obtained product is rapidly solidified to form a surface coating which has extremely low dilution and is metallurgically bonded with the substrate, so that the wear resistance, corrosion resistance, heat resistance and oxidation resistance of the surface of the substrate are obviously improved.
(6) reprocessing
And carrying out rough boring processing twice on the clad bearing hole by using a numerical control boring machine, wherein the fine boring processing twice meets the requirements on dimensional tolerance, form and position tolerance, surface roughness and hardness.
(7) Cleaning up
And cleaning the outer surface of the shell.
the invention has the beneficial effects that: the method has the advantages of realizing the ultra-differential repair of the bearing hole of the speed reducer shell, reducing the rejection rate of the speed reducer shell, having long service cycle and high reliability, and improving the economic benefit and social benefit of enterprises.
Detailed Description
A method for repairing a bearing hole of a speed reducer shell comprises the following steps:
(1) Pretreatment of
The method comprises the steps of comprehensively cleaning paint, rust, oil stain and irregular burrs in the periphery of a bearing hole of a speed reducer shell, polishing by using a gauze-wound angle grinder, cleaning a worn surface by using cleaning liquid, exposing the original appearance, taking a picture, carrying out nondestructive inspection, giving information such as defect size, position, property and quantity, and inspecting the wear condition of the damaged part.
(2) Detection of
the method comprises the steps of detecting the dimensional tolerance and the form and position tolerance of a bearing hole of a speed reducer shell by using a detection tool, detecting the form and position tolerance of the bearing hole according to the GB1184-80 standard, detecting the dimensional tolerance according to the standard size and the tolerance zone of the GB1800-79 standard, testing the surface hardness of the speed reducer shell by using a hardness meter, detecting whether the hardness meets the requirement or not, and recording and mapping the surface.
(3) Machining
And (3) mechanically processing the damaged and out-of-tolerance speed reducer bearing hole, grinding and roughly boring to remove the fatigue layer on the surface of the workpiece, so that the workpiece meets the repairing requirement.
(4) Assay analysis
And (4) inspecting and analyzing the material of the body, sampling, performing spectral analysis, and selecting the material similar to the material of the body as a cladding material.
(5) laser cladding
And cladding the bearing hole of the mechanically processed speed reducer shell, wherein the cladding is to heat a cladding material and the surface of a base material by adopting a laser beam to fuse the required special material on the surface of a workpiece, the cladding material is firstly placed on the working surface, then the cladding material is melted, a cladding layer is formed after condensation, the cladding surface is 2-3 mm higher than the reference surface, and a processing allowance is reserved.
(6) Reprocessing
And carrying out rough boring processing twice on the bearing hole of the cladded speed reducer shell by using a numerical control boring machine, wherein the fine boring processing twice meets the requirements on dimensional tolerance, form and position tolerance, surface roughness and hardness. According to GB3505-83 and GB1031-83, the roughness of the surface of the processed speed reducer shell reaches 1.6, and according to GB1348-88, the surface hardness of the speed reducer shell reaches about LV440 aiming at the condition that the hardness of the cast iron material of the speed reducer shell is low.
(7) Cleaning up
Cleaning the outer surface around the bearing hole of the reducer shell, deburring, grinding and polishing, and cleaning with a cleaning agent.
Claims (1)
1. A method for repairing a bearing hole of a speed reducer shell is characterized by comprising the following steps: the method comprises the following steps:
(1) Pretreatment of
Completely cleaning rust and oil stains around a bearing hole of a reducer shell, and giving information such as defect size, position, property and quantity;
(2) Detection of
dimensional tolerance, form and position tolerance detection, surface hardness test, recording and mapping;
(3) Machining
Machining a damaged and out-of-tolerance bearing hole of the speed reducer to remove a surface fatigue layer;
(4) Assay analysis
Inspecting and analyzing the material of the machine body, and selecting a material close to the material of the machine body as a melting material;
(5) cladding
Cladding the machined bearing hole, wherein the cladding surface is 2-3 mm higher than the reference surface, and a machining allowance is reserved;
(6) Reprocessing
Carrying out rough boring processing twice on the clad bearing hole by using a numerical control boring machine, wherein the fine boring processing twice meets the requirements on dimensional tolerance, form and position tolerance, surface roughness and hardness;
(7) cleaning up
And cleaning the outer surface of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910826371.8A CN110561029A (en) | 2019-09-03 | 2019-09-03 | Method for repairing bearing hole of speed reducer shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910826371.8A CN110561029A (en) | 2019-09-03 | 2019-09-03 | Method for repairing bearing hole of speed reducer shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110561029A true CN110561029A (en) | 2019-12-13 |
Family
ID=68777450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910826371.8A Withdrawn CN110561029A (en) | 2019-09-03 | 2019-09-03 | Method for repairing bearing hole of speed reducer shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110561029A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113996803A (en) * | 2021-10-15 | 2022-02-01 | 中国航发北京航空材料研究院 | Process method for remanufacturing shell hole rolling groove by direct laser deposition |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1344563A1 (en) * | 1985-01-10 | 1987-10-15 | Московский Институт Инженеров Гражданской Авиации | Method of reconditioning fits of bearings |
| CN104308451A (en) * | 2014-11-14 | 2015-01-28 | 北京中纬研科新材料有限公司 | Speed reducer bearing block repair method |
| CN104786003A (en) * | 2015-05-25 | 2015-07-22 | 南车戚墅堰机车有限公司 | Method for repairing main bearing hole of body |
| CN104801919A (en) * | 2015-05-05 | 2015-07-29 | 沈阳东卫机器制造有限公司 | Repairing method for bearing seat |
| CN107350713A (en) * | 2017-05-25 | 2017-11-17 | 陕西陕煤韩城矿业有限公司 | Box body of speed reducer bearing hole technology for repairing wear |
| CN107747090A (en) * | 2017-10-23 | 2018-03-02 | 谷云蕾 | A kind of method of laser remanufacturing rolling mill bearing |
-
2019
- 2019-09-03 CN CN201910826371.8A patent/CN110561029A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1344563A1 (en) * | 1985-01-10 | 1987-10-15 | Московский Институт Инженеров Гражданской Авиации | Method of reconditioning fits of bearings |
| CN104308451A (en) * | 2014-11-14 | 2015-01-28 | 北京中纬研科新材料有限公司 | Speed reducer bearing block repair method |
| CN104801919A (en) * | 2015-05-05 | 2015-07-29 | 沈阳东卫机器制造有限公司 | Repairing method for bearing seat |
| CN104786003A (en) * | 2015-05-25 | 2015-07-22 | 南车戚墅堰机车有限公司 | Method for repairing main bearing hole of body |
| CN107350713A (en) * | 2017-05-25 | 2017-11-17 | 陕西陕煤韩城矿业有限公司 | Box body of speed reducer bearing hole technology for repairing wear |
| CN107747090A (en) * | 2017-10-23 | 2018-03-02 | 谷云蕾 | A kind of method of laser remanufacturing rolling mill bearing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113996803A (en) * | 2021-10-15 | 2022-02-01 | 中国航发北京航空材料研究院 | Process method for remanufacturing shell hole rolling groove by direct laser deposition |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191213 |
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| WW01 | Invention patent application withdrawn after publication |