Laser repairing method for rolling mill bearing seat

A technology of laser repair and repair method, which is applied in the field of equipment maintenance, can solve the problems of unusable bearing housing, large difference in wall thickness, and phase change of structure, and achieves the effect of low production cost, dense interface structure and good lasting strength.

Inactive Publication Date: 2018-05-18
SHENYANG DALU LASER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large shape, large and deep aperture, large difference in wall thickness, high precision and easy deformation, cracks and heat-affected zones will inevitably occur in various thermal processing methods such as electric welding, argon arc welding, and vibration welding. Harmful effects such as tissue phase transformation and residual stress causing pore diameter deformation
As a result, the bearing seat cannot be used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Rolling mill bearing housing of a universal rolling mill line in a steel plant

[0026] Basic situation of rolling mill bearing housing:

[0027] Specification: 880×1200mm; Weight: 1200kg / piece; Material: S45C.

[0028] Maintenance method flow

[0029] 1. Detect and record the wear thickness of the bearing seat of the rolling mill.

[0030] 2. Mechanically clean the parts that need to be clad, and remove the oxide layer and fatigue layer.

[0031] 3. Laser cladding:

[0032] A. Fix the bearing seat of the rolling mill on the laser CNC machining machine tool to ensure that the plane to be clad is basically in a horizontal state.

[0033] B. Laser cladding metal powder: Cr: 12.5%, Mo: 5%, W: 10%, Ti: 5%, Ni: 13%, Al: 2%, Fe balance;

[0034] Cladding method parameters: power: 6000-700W, scanning speed: 150mm / s, lap spacing: 1.5mm, cladding layer thickness: 3mm, spot diameter: 10mm.

[0035] 4. Machining:

[0036] Carry out mechanical processing on the bea...

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Abstract

The invention belongs to the technical field of equipment maintenance, and particularly provides a repairing process for repairing a rolling mill bearing seat by utilizing a laser cladding technology.The repairing process comprises the following steps of 1, detecting the surface of a rolling mill bearing seat; 2, carrying out mechanical cleaning on the rolling mill bearing seat; 3, preparing a laser cladding material to carry out repairing on the rolling mill bearing seat; and 4, carrying out machining and detection after repairing on the rolling mill bearing seat. The repairing process is simple in operation and suitable for industrial popularization and application.

Description

technical field [0001] The invention belongs to the technical field of equipment maintenance, and in particular provides a repair method for repairing a bearing seat of a rolling mill by using laser cladding technology. Background technique [0002] As the core part of the rolling mill, the bearing housing of the rolling mill bears the impact force of the steel plate biting and extrusion, and the high cycle stress during the straightening process of the machine rolling. In order to meet the service conditions, the equipment is required to have high strength and good performance. plasticity and toughness. Bearing housings have high precision grades and complex manufacturing methods, and once problems occur during operation, they will affect the smooth operation of the entire rolling mill, so the quality requirements are very high. [0003] The bearing seat is installed in the archway, and the rolling mill pressing device and the axial adjustment mechanism are all on the bear...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/106
Inventor吴伟李佳王永新
OwnerSHENYANG DALU LASER TECH