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| Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
|---|---|
| Author | Croccolo, Dario Agostinis, Massimiliano De Fini, Stefano Olmi, Giorgio Robusto, Francesco Cavalli, Omar Vincenzi, Nicolò |
| Copyright Year | 2018 |
| Abstract | The present paper aims at determining the effect of several design and manufacturing parameters on the frictional response of the underhead contact in a bolted joint comprising a socket-head M6 class 12.9 screw. The rationale of the research moves from the need to understand the frictional behavior of screw joints used in machine tools as a means to join roller monoguides with the moving carriages of three-axis tooling units. The experimentation takes into account different underhead materials (Steel, Cast Iron, Aluminum), different roughness levels (Ra = 0.8, 1.6, 3.2), different surface treatments (No treatment, oxidised, DLC), as well as repeated tightening operations. The experimentation has been run by a specifically developed specimen, consisting of two parts: an instrumented sleeve, equipped with a double array of strain gauges capable of sampling both the axial preload and the underhead torque, and interchangeable underhead washers, with an anti-rotation device, whose material and surface treatment are suitably changed among the different sets. The tightening torque is recorded by a digital torque wrench. The collected data are processed by ANoVa tools, to investigate the significance of each factor, as well as related interactions. The friction coefficients associated with the different operating parameters are a useful tool to support the design task of bolted joints. |
| Sponsorship | Pressure Vessels and Piping Division |
| File Format | |
| ISBN | 9780791851616 |
| DOI | 10.1115/PVP2018-84530 |
| Volume Number | Volume 2: Computer Technology and Bolted Joints |
| Conference Proceedings | ASME 2018 Pressure Vessels and Piping Conference |
| Language | English |
| Publisher Date | 2018-07-15 |
| Publisher Place | Prague, Czech Republic |
| Access Restriction | Subscribed |
| Subject Keyword | Torque Rollers Aluminum Cast iron Bolted joints Strain gages Surface roughness Railroad passenger cars Steel Torque wrenches Surface finishing Rotation Tooling Design Friction Screws Hardness (materials) Machine tools Manufacturing |
| Content Type | Text |
| Resource Type | Article |
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