| Title: |
EFFECT OF USING 3D PRINTED PARTS ON THE TORQUE-TENSION RELATIONSHIP OF THREADED JOINTS |
| Authors: |
Robusto F.; Gerini-Romagnoli M.; De Agostinis M.; Lee J. H.; Nassar S. A. |
| Contributors: |
Robusto F.; Gerini-Romagnoli M.; De Agostinis M.; Lee J.H.; Nassar S.A. |
| Publisher Information: |
American Society of Mechanical Engineers (ASME) |
| Publication Year: |
2022 |
| Collection: |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
| Subject Terms: |
3d print; threaded joint; bolt; torque |
| Description: |
This study investigates the effect of shot-peened additively manufactured aluminum parts on the torque-tension relationship of threaded joints, as compared to extruded components. Steel flange head bolts are utilized. A computer-controlled RS torque-tension system is used for tightening test joints to a target preload, and frictional data is collected at a high sampling rate. A final group of additive manufactured specimens is analyzed to evaluate the effect of machining on the tribological response of the bolted joint. The underhead friction coefficient is measured over 5 consecutive tightenings, with and without disassembly and cooldown. The bearing surface topology is analyzed using an optical profilometer after each tightening. Fasteners and parts are ultrasonically cleaned, and tests are performed with no lubrication. Cooldown between consecutive tightenings had a significant effect on the frictional characteristics of non-machined additively manufactured joints. The lower surface integrity of the 3D printed components resulted in severe damage to the bearing surface after 5 tightening operations. Discussion of the results and conclusions are provided. |
| Document Type: |
conference object |
| File Description: |
ELETTRONICO |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/isbn/978-0-7918-8663-2; ispartofbook:ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE); ASME 2022 International Mechanical Engineering Congress and Exposition, IMECE 2022; volume:2-A; firstpage:1; lastpage:8; numberofpages:8; https://hdl.handle.net/11585/919873 |
| DOI: |
10.1115/IMECE2022-95614 |
| Availability: |
https://hdl.handle.net/11585/919873; https://doi.org/10.1115/IMECE2022-95614 |
| Accession Number: |
edsbas.23B0D9B |
| Database: |
BASE |