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Axle remanufacturing method, remanufacturing axle and system

A remanufacturing and axle technology, applied in coating, metal material coating process, etc., can solve problems such as surface residual stress and surface structure deterioration, so as to improve product quality and service life, improve fatigue performance, and eliminate residual tensile stress Effect

Active Publication Date: 2022-07-29
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the deficiencies in the prior art, the first object of the present invention is to provide a method for axle remanufacturing, which solves the problems of residual stress on the surface of the remanufactured axle and the deterioration of surface tissue, and at the same time introduces compressive stress at the repaired position to improve the remanufacturing process. Product quality and service life of axles

Method used

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  • Axle remanufacturing method, remanufacturing axle and system
  • Axle remanufacturing method, remanufacturing axle and system
  • Axle remanufacturing method, remanufacturing axle and system

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Embodiment 1

[0067] In a typical embodiment of the present invention, a method for remanufacturing an axle includes the following contents:

[0068] 1) Laser cladding remanufacturing

[0069] Use a lathe to remove the scratch defect of the axle with a depth of 0.2mm. After removing the scratch defect, use magnetic particle inspection to confirm whether the defect is completely removed.

[0070] The hollow axle to be repaired is clamped on the lathe, specifically, the three-jaw chuck is used for clamping, the semiconductor laser is used to emit laser, and the coaxial powder feeding method is used to laser clad the position of the axle to be repaired. Iron-based powder is selected. As filler material for laser cladding of axles.

[0071] The laser cladding process parameters are: laser power 2-2.5kw; spot diameter 3mm; scanning rate: 8-10mm / s; overlap amount: 50%; distance between nozzle and workpiece: 10-15mm. Laser cladding is carried out according to the above process parameters, the th...

Embodiment 2

[0103] This embodiment provides a remanufactured axle, which is manufactured by the remanufacturing method of the axle described in the first embodiment.

Embodiment 3

[0105] This embodiment provides a processing system for remanufacturing an axle, including:

[0106] The lathe can realize the removal of the scratch defect of the axle, and can realize the rough machining of the axle, and multiple lathes can be installed;

[0107] Laser cladding equipment for laser cladding of axles, which can be installed on lathes;

[0108] A package kit, which can be wrapped around the laser-clad axle, used to insulate the area where the laser cladding layer of the axle is set to the center of the axle;

[0109] Laser shock-strengthening equipment is used for laser shock-strengthening the rough-processed axles. The laser shock head is clamped by the manipulator of the robot, and the robot is installed on the side of the lathe.

[0110] Of course, the processing system also includes a kerosene tank, which can cool the axle after the first thermal insulation.

[0111] In addition, the machining system includes a hoisting mechanism for lifting the axles for...

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Abstract

The invention discloses an axle remanufacturing method, remanufacturing axle and system, which solve the problems of surface residual stress and surface structure deterioration of the remanufacturing axle, and have the beneficial effects of improving the product quality and service life of the remanufacturing axle. The specific scheme is as follows : an axle remanufacturing method, which removes the part of the axle with scratch defects; performs several layers of laser cladding on the area of ​​the axle to be repaired after the removal is completed to form a laser cladding layer; after the axle laser cladding is completed, the axle to be repaired The area is quenched. During the quenching process, the area of ​​the axle to be repaired is heated and kept for a set time to heat the area of ​​the laser cladding layer to the center of the axle. After the quenching is completed, the area to be repaired of the axle is tempered.

Description

technical field [0001] The invention relates to the field of rail transportation, in particular to a method for remanufacturing an axle, a remanufacturing axle and a system. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Trains such as high-speed EMUs need to be inspected and maintained every time they run for a certain period or mileage. Among them, wheel, axle 1 (see figure 1 When unloading, it is easy to cause scratches at the wheel seat 2 position, and the depth of the scratches is long and has a certain depth. When the scratch depth exceeds the maintenance standard (usually 0.1mm), it needs to be scrapped. [0004] Laser cladding remanufacturing technology refers to using waste parts with excessive damage as remanufacturing blanks, using laser cladding technology as a repair method, and heating powder, wire and other filling materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C21D1/18C21D10/00
CPCC23C24/10C21D1/18C21D10/005
Inventor 齐先胜肖雪峰李硕郑海霞何晓龙
Owner CRRC QINGDAO SIFANG CO LTD
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