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Laser repair method for abraded centrifugal fan bearing block

A centrifugal fan and laser repair technology, which is applied in laser welding equipment, coating, metal material coating technology, etc., can solve the problems of cracks, easy to fall off repair layer, poor wear resistance, etc., and achieve fine grain size, good resistance Good thermal fatigue and fracture properties, good wear resistance

Active Publication Date: 2012-01-11
河北瑞兆激光再制造技术股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the disadvantages of existing traditional surfacing welding technology such as poor wear resistance, easy fall off of the repair layer, and cracks, and provide a kind of good wear resistance, strong hardness, less cracks in the repair layer, cladding layer and bearing seat. A laser repair method for centrifugal fan bearing seats using laser cladding technology with high fusion rate of base metal and small deformation of bearing seats

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The first step of the preparation before repair: disassemble and disassemble the centrifugal fan equipment numbered RZ-LF-011 to be repaired, mark it, clean the workpiece with high-pressure water gun, and clean the dust, oil, rust, etc. on the bearing seat of the centrifugal fan , Detect the size of each part, determine the damaged part of the bearing seat and the amount of wear. Perform radial and end face bounce on the bearing seat of the centrifugal fan to detect whether there is any deformation. Carry out failure analysis and life evaluation of the workpiece, formulate the repair process according to the repair content, etc.; according to the damage situation, remove the damaged part by 1.5mm from the fatigue layer, and a new processing surface appears. Detect the base material of the bearing seat and its hardness, and confirm that the base material of the bearing seat is HT15-32 gray cast iron.

[0028] The second step is in the repair process: configure the metal al...

Embodiment 2

[0031] The first step is the preparation before repairing, disassembling and disassembling the centrifugal fan equipment numbered RZ-LF-017 to be repaired, marking, cleaning the workpiece, cleaning the dust, oil, rust, etc. on the bearing seat of the centrifugal fan, and inspecting the size of each part , Determine the damaged part of the cylinder bearing seat and its wear amount. Perform radial and end face bounce on the bearing seat of the centrifugal fan to detect whether there is any deformation. Carry out failure analysis and life evaluation of the workpiece, formulate the repair process and working hours according to the repair content; remove 1.3mm of the fatigue layer from the damaged part, and clean it, so that a new processing surface appears. Detect the base material of the bearing seat and its hardness, and confirm that the base material of the bearing seat is HT15-32 gray cast iron.

[0032] The second step is in the repair process: configure the metal alloy powder ...

Embodiment 3

[0035] The first step is to prepare before repairing, disassemble and disassemble the bearing seat of the centrifugal fan to be repaired with the number RZ-LFZ-016, mark, clean the workpiece, clean up the dust, oil, rust, etc. on the bearing seat of the centrifugal fan, and inspect each part Size, determine the damaged part of the cylinder bearing seat and the amount of wear. Perform radial and end face bounce on the bearing seat of the centrifugal fan to detect whether there is any deformation. Carry out failure analysis and life evaluation of the workpiece, formulate the repair process and working hours according to the repair content; remove 2mm of the fatigue layer from the damaged part, and clean it, so that a new processing surface appears. Detect the base material of the bearing seat and its hardness, and confirm that the base material of the bearing seat is HT15-32 gray cast iron.

[0036] The second step is in the repair process: According to the detected results, the m...

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Abstract

The invention relates to a laser repair method of the mechanical repair field, in particular to a laser repair method for an abraded centrifugal fan bearing block. The laser repair method comprises the following steps of: cleaning a workpiece, detecting the dimensions of each part and determining a damaged part and the abrasion loss thereof; carrying out circular runout and end face runout detection on the workpiece; carrying out failure analysis and service life evaluation on the workpiece; removing the fatigue layer of the damaged part of the centrifugal fan bearing block and washing clean;detecting the hardness and the component of the parent material of the centrifugal fan bearing block; according to a detection result, preparing cladding powder, regulating the operating data of a laser device, setting a laser cladding technical parameters and carrying out laser cladding on the damaged part of the centrifugal fan bearing block by adopting a synchronous powder feeding mode; carrying out mechanical processing according to the requirement; carrying out surface colouration flaw detection on the processed workpiece, and detecting the processing precision of the centrifugal fan bearing block; and checking the centrifugal fan bearing block. The method has the advantages of high abrasion resistance, high hardness, high fusing rate of a cladding layer and the parent material of the bearing block, small deformation of the bearing block and the like.

Description

Technical field [0001] The invention relates to a laser repair method in the field of mechanical repair, in particular to a laser repair method for a bearing seat of a centrifugal fan. Background technique [0002] Because the bearing seat of the centrifugal compressor bears a large alternating load during operation, and the workpiece itself has manufacturing defects, there is a stress concentration at the connection between the edge of the rib and the floor, and it is easy to break and form cracks at the stress concentration. It extends to the ribs and breaks. The prior art uses metal glue bonding technology, welding surfacing technology and other technologies to repair cracks and fractures. This repair method has defects such as poor wear resistance, easy peeling of the repair layer, containing cracks, and easy peeling of the coating. These deficiencies have seriously affected the recycling rate of centrifugal fans. The replacement of equipment requires a lot of cost and waste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B23K26/34B23K26/342
Inventor 韩宏升付宇明唐学锋郑丽娟
Owner 河北瑞兆激光再制造技术股份有限公司
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