Laser repair method for abraded centrifugal fan bearing block

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] Due to the fact that the bearing seat of the centrifugal compressor bears a large alternating load during operation, and the workpiece itself has manufacturing defects, there is stress concentration at the joint between the edge of the rib and the floor, and it is easy to break and form cracks at the stress concentration point. Expansion to the fracture occurs at the rib plate. The existing technology adopts 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, cracks, and easy peeling of the coating. These defects have seriously affected the reutilization rate of the centrifugal fan, and the replacement of eq...

Examples

Embodiment 1

[0027] The first step of preparation before repair: Disassemble and disassemble the centrifugal fan equipment numbered RZ-LF-011 to be repaired, mark it, clean the workpiece with a 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 surface runout on the bearing housing 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; according to the damage situation, remove the fatigue layer of 1.5mm from the damaged part, and a new processing surface appears. Detect the material and hardness of the base material of the bearing seat, 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...

Embodiment 2

[0031] The first step is to prepare before the repair, disassemble and disassemble the centrifugal fan equipment numbered RZ-LF-017 to be repaired, mark it, clean the workpiece, clean the dust, oil, rust, etc. on the bearing seat of the centrifugal fan, and test the dimensions of each part , to determine the damaged part of the cylinder bearing seat and its wear amount. Perform radial and end surface runout on the bearing housing 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, working hours, etc. according to the repair content; remove the fatigue layer of 1.3mm from the damaged part, and clean it to show a new processed surface. Detect the material and hardness of the base material of the bearing seat, 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 powd...

Embodiment 3

[0035] The first step is to prepare before the repair, disassemble and disassemble the bearing seat of the centrifugal fan numbered RZ-LFZ-016 to be repaired, mark it, clean the workpiece, clean the dust, oil, rust, etc. on the bearing seat of the centrifugal fan, and inspect all parts Size, determine the damaged part of the cylinder bearing seat and its wear amount. Perform radial and end surface runout on the bearing housing 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, working hours, etc. according to the repair content; remove the fatigue layer of 2 mm from the damaged part, and clean it to create a new processed surface. Detect the material and hardness of the base material of the bearing seat, 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: configure the metal alloy powder...

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] Due to the fact that the bearing seat of the centrifugal compressor bears a large alternating load during operation, and the workpiece itself has manufacturing defects, there is stress concentration at the joint between the edge of the rib and the floor, and it is easy to break and form cracks at the stress concentration point. Expansion to the fracture occurs at the rib plate. The existing technology adopts 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, cracks, and easy peeling of the coating. These defects have seriously affected the reutilization rate of the centrifugal fan, and the replacement of eq...

Examples

Embodiment 1

[0027] The first step of preparation before repair: Disassemble and disassemble the centrifugal fan equipment numbered RZ-LF-011 to be repaired, mark it, clean the workpiece with a 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 surface runout on the bearing housing 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; according to the damage situation, remove the fatigue layer of 1.5mm from the damaged part, and a new processing surface appears. Detect the material and hardness of the base material of the bearing seat, 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...

Embodiment 2

[0031] The first step is to prepare before the repair, disassemble and disassemble the centrifugal fan equipment numbered RZ-LF-017 to be repaired, mark it, clean the workpiece, clean the dust, oil, rust, etc. on the bearing seat of the centrifugal fan, and test the dimensions of each part , to determine the damaged part of the cylinder bearing seat and its wear amount. Perform radial and end surface runout on the bearing housing 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, working hours, etc. according to the repair content; remove the fatigue layer of 1.3mm from the damaged part, and clean it to show a new processed surface. Detect the material and hardness of the base material of the bearing seat, 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 powd...

Embodiment 3

[0035] The first step is to prepare before the repair, disassemble and disassemble the bearing seat of the centrifugal fan numbered RZ-LFZ-016 to be repaired, mark it, clean the workpiece, clean the dust, oil, rust, etc. on the bearing seat of the centrifugal fan, and inspect all parts Size, determine the damaged part of the cylinder bearing seat and its wear amount. Perform radial and end surface runout on the bearing housing 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, working hours, etc. according to the repair content; remove the fatigue layer of 2 mm from the damaged part, and clean it to create a new processed surface. Detect the material and hardness of the base material of the bearing seat, 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: configure the metal alloy powder...