Title:
METHOD FOR REPAIRING ABRADED BEARING
Document Type and Number:
WIPO Patent Application WO/2019/037410
Kind Code:
A1
Abstract:
Disclosed is a method for repairing an abraded bearing, wherein the method comprises the following steps: (1) disassembling an apparatus before repairing is carried out, cleaning a bearing in an ultrasonic cleaning machine by using an acetone solution, detecting the dimensions of various components, and determining a damaged part and the amount of abrasion thereof; (2) according to a detection result, removing a fatigued layer of 0.5-1.5 cm from the damaged part of the bearing, and cleaning the bearing, from which the fatigued layer has been removed, so as to provide a new surface to be processed; (3) performing a rough treatment on the surface to be processed by using sandpaper, cleaning and drying the surface to be processed, mixing tungsten powder and white latex according to the weight ratio of 20:1, and stirring same until uniform, evenly applying the mixed tungsten powder on a bearing surface by using a brush and carrying out a shaping treatment on the coated part by using a scraper, and drying same, wherein the thickness of the pre-applied tungsten powder is 0.1 mm; (4) fixing the bearing, on which the tungsten powder is pre-applied, in step (3) on a laser cladding apparatus, cladding and scanning graphite powder on the bearing surface by means of a laser beam, and after scanning, carrying out a smoothing treatment on the surface, cladded with tungsten, of the bearing; (5) preparing an alloy powder, placing the alloy powder, prepared in proportion, into a mechanical powder mixer and mixing same for 0.5 to 1 hour; (6) mixing the alloy powder prepared in step (5) with the white latex according to the weight ratio of 20:1, stirring same until uniform, evenly applying the mixed alloy powder on the bearing surface, cladded with the tungsten powder, in step (4), wherein the thickness of the pre-applied alloy powder is 3 to 5 mm; (7) fixing the bearing, on which the alloy powder is pre-applied, in step (6) on the laser cladding apparatus; (8) grinding and processing a bearing base according to drawings and relevant technical requirements, performing surface colouring flaw detection on the processed workpiece to check whether there are performance defects, detecting the accuracy of bearing processing, and checking the bearing base of a centrifugal fan; and (9) placing the bearing, cladded with the alloy powder, in step (8) in a tempering chamber and tempering same for 5 hours, and after tempering, naturally cooling the bearing at room temperature.
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Inventors:
HAN CHUANHUAI (CN)
Application Number:
PCT/CN2018/079540
Publication Date:
February 28, 2019
Filing Date:
March 20, 2018
Export Citation:
Assignee:
HAN CHUANHUAI (CN)
International Classes:
C23C24/10; B23P6/00; C22C19/05
Foreign References:
| CN102615431A | 2012-08-01 | |||
| CN102899661A | 2013-01-30 | |||
| CN107723700A | 2018-02-23 |
Other References:
WU, YANG ET AL.: "Microstructure and Properties of Fe-W Composite Coating by Laser Cladding", TRANSACTIONS OF THE CHINA WELDING INSTITUTION, vol. 33, no. 2, 29 February 2012 (2012-02-29), pages 37
Attorney, Agent or Firm:
NANJING HUIHENG INTELLECTUAL PROPERTY AGENCY OFFICE (GENERAL PARTNERSHIP) (CN)
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