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Method for restoring inner bore of gear coupling

A technology of gear coupling and repair method, applied in the direction of metal material coating process, coating, etc., can solve the problems of misalignment of rotation axes, increase maintenance work, increase production cost, etc., to reduce resource and energy consumption, The effect of reducing environmental pollution and improving use efficiency

Inactive Publication Date: 2012-10-24
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex working environment, affected by factors such as temperature, humidity, water, steam, dust, sand, oil, acid, alkali, corrosive medium, salt water, radiation, etc., the inner hole of the gear coupling is worn, and the center of mass or inertia occurs. The main shaft and its axis of rotation do not coincide, and unbalanced centrifugal inertial force, centrifugal moment of inertia and dynamic deflection will occur during operation, so that the meshing between the shaft teeth and the internal teeth will not be correct, resulting in local contact and additional torque. This problem is inevitable As a result, the inner ring gear of the gear coupling produces a large axial displacement, so that the inner and outer tooth surfaces are severely worn, unable to mesh, and even broken teeth and counterpart bolts may occur, which will affect the normal operation and service life of the machine. Type couplings are often damaged and replaced, which not only increases the production cost, but also affects the operation rate of the production line and increases the maintenance work
[0003] At present, the common surfacing and spraying process is difficult to repair the inner hole of the gear coupling and improve the service life due to its own technical characteristics. Aiming at how to improve the service life of the gear coupling, domestic and foreign Many aspects of research work have been carried out, mainly in the alloy chemical composition ratio and heat treatment process in the material smelting process, to prepare materials suitable for the working conditions of gear couplings, but because these materials are all made of a single material, the other Price, hardness, wear resistance, strength, plasticity and toughness and other indicators are difficult to achieve a balance, unable to meet the special requirements of the complex working conditions of the gear coupling, and do not have good adaptability

Method used

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  • Method for restoring inner bore of gear coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First, disassemble and disassemble the gear coupling equipment, mark it, clean the workpiece, check the size, and determine if figure 1 The wear part and the wear amount of the inner hole of the gear coupling are shown, and the inner hole of the gear coupling is inspected for radial and end runout, and the failure analysis and life evaluation of the workpiece are carried out, and the gear coupling is measured. Check whether the size of each part is suitable for the laser cladding repair standard, and then remove the 2mm fatigue layer on the surface of the inner hole of the gear coupling to ensure that there are no serious defects such as cracks on the surface of the gear coupling; use the mechanical mixing method to mix the proportioned Ni55 and nano-WC powder into a mechanical powder mixer and fully mixed. The mixing time is 1.5 hours. The mixing ratio of alloy powder is: Ni55 powder accounts for 99% of the total mass, and nano-WC powder accounts for 1% of the total ma...

Embodiment 2

[0028] First, disassemble and disassemble the gear coupling equipment, mark it, clean the workpiece, check the size, and determine if figure 1 The wear part and the wear amount of the inner hole of the gear coupling are shown, and the inner hole of the gear coupling is checked for radial and end runout, and the failure analysis and life evaluation of the workpiece are carried out, and the gear coupling is measured. Check whether the size of each part is suitable for the laser cladding repair standard, and then remove the 2.5mm fatigue layer on the inner hole surface of the gear coupling to ensure that there are no serious defects such as cracks on the surface of the gear coupling; The Ni55 and nano-WC powders were put into a mechanical powder mixer and mixed fully. The mixing time was 1.5 hours. The mixing ratio of the alloy powders was: Ni55 powder accounted for 98.5% of the total mass, and WC powder accounted for 1.5% of the total mass. Shaft powder feeding method, the powd...

Embodiment 3

[0030] First, disassemble and disassemble the gear coupling equipment, mark it, clean the workpiece, check the size, and determine if figure 1The wear part and the wear amount of the inner hole of the gear coupling are shown, and the inner hole of the gear coupling is inspected for radial and end runout, and the failure analysis and life evaluation of the workpiece are carried out, and the gear coupling is measured. Check whether the size of each part is suitable for the laser cladding repair standard, and then remove the 3mm fatigue layer on the surface of the inner hole of the gear coupling to ensure that there are no serious defects such as cracks on the surface of the gear coupling; use the mechanical mixing method to mix the proportioned Ni55 and nano-WC powder into a mechanical powder mixer and fully mixed. The mixing time is 1.5 hours. The mixing ratio of the alloy powder is: Ni55 powder accounts for 98% of the total mass, and WC powder accounts for 2% of the total mass...

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Abstract

A method for restoring the inner bore of a gear coupling is disclosed. Dimensions of all parts of the gear coupling are measured to check whether all the dimensions satisfy laser coating restoration standards, the surface fatigue layer of the inner bore of the gear coupling is removed, Ni55 and nanometer WC powder which are prepared in proportion are fully mixed in a mechanical powder mixer through adopting a mechanical mixing method, the Ni55 and the nanometer WC powder are coated on the surface of the inner bore of the gear coupling through adopting a coaxial powder sending method and through scanning by adopting a large-power CO2 laser, and the gear coupling undergoes heat treatment and then is slowly cooled with a furnace; and the inner bore of the cooled gear coupling is machined to obtain the gear coupling with the dimensions and the surface process which satisfy requirements, the gear coupling undergoes processing precision detection, and finally the gear coupling is packaged. Compared with the prior art, the method disclosed in the invention has the advantages of continuous use, better performances and long service life of the gear coupling, simple technology, strong controllability, less energy consumption and the like.

Description

technical field [0001] The invention relates to a method for repairing a mechanical transmission part, in particular to a method for repairing an inner hole of a gear coupling. Background technique [0002] Gear couplings are mechanical transmission parts widely used in metallurgy, mining, lifting transportation, papermaking, general and other fields. The performance and service life of gear couplings directly affect the operating rate of equipment and the quality of mechanical products. . Due to the complex working environment, affected by factors such as temperature, humidity, water, steam, dust, sand, oil, acid, alkali, corrosive medium, salt water, radiation, etc., the inner hole of the gear coupling is worn, and the center of mass or inertia occurs. The main shaft and its axis of rotation do not coincide, and unbalanced centrifugal inertial force, centrifugal moment of inertia and dynamic deflection will occur during operation, so that the meshing between the shaft tee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B23P6/00
Inventor 付宇明郑丽娟张金森王军
Owner YANSHAN UNIV
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