Damage-reduction experimental research of bogie node assembly and disassembly based on surface texture
During the whole service life of a rail vehicle, the interference fit of positioning arm and rubber node in the bogie has to undergo several times of assembly and disassembly as required by maintenance. The resulting damage on the matching surface has a negative impact on the service performance of...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2023-05-01
|
| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2023.03.102 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | During the whole service life of a rail vehicle, the interference fit of positioning arm and rubber node in the bogie has to undergo several times of assembly and disassembly as required by maintenance. The resulting damage on the matching surface has a negative impact on the service performance of the parts and maintenance cost. The assembly and disassembly damage of matching surface is essentially a kind of friction damage under the action of high contact pressure. As the surface texture has good friction reduction characteristics, a kind of round pit matrix texture (surface density 30%, diameter 100 μm, depth 40 μm) with better damage reduction performance was machined onto the interference fit surface of rubber node. The experimental results show that the surface texture can effectively reduce the assembly and disassembly damage of fit surface. Especially the surface texture with melted layer is more excellent, which can greatly reduce the surface damage, improve the bearing capacity of the interference fit and effectively reduce the amplitude of pressure impact during the assembly and disassembly process. The main reason for the improvement of damage reduction performance is that the texture pits on the mating surface have a good grain storage ability, which reduces the occurrence probability of three-body wear. In addition, the hardness of the melted layer formed by laser processing is higher than that of the substrate, and the contact on the matching surface mostly occurs at the location of the melting layer, which reduces the real contact area and the possibility of adhesion. This finding is of positive significance for the interference fits that need to be disassembled and assembled for multiple times during their service lives. |
|---|---|
| ISSN: | 1000-128X |