Abstract
A new, simulative test of friction and lubrication in cold forging is developed by the authors. The test is based on a backward can extrusion process in which the workpiece rotates relatively to the conical punch. An analytical model is presented determining the friction stress from the measured torque during testing combined with an analysis of the sliding velocity distribution along the punch nose. The latter is determined by FE analysis of the test. Results show friction stress for unalloyed low C-steel provided with different types of lubricants, i.e. phosphate coating plus soap, phosphate coating plus MoS2 and single bathe lubrication with PULS and aluminum provided with 6 different lubricant systems. The new test is so severe, that it is possible to break down the best lubrication systems for cold forging of steel and aluminum.
| Original language | English (US) |
|---|---|
| Title of host publication | 40th North American Manufacturing Research Conference 2012 - Transactions of the North American Manufacturing Research Institution of SME |
| Pages | 287-296 |
| Number of pages | 10 |
| Volume | 40 |
| State | Published - Nov 28 2012 |
| Event | 40th Annual North American Manufacturing Research Conference, NAMRC40 - Notre Dame, IN, United States Duration: Jun 4 2012 → Jun 8 2012 |
Other
| Other | 40th Annual North American Manufacturing Research Conference, NAMRC40 |
|---|---|
| Country/Territory | United States |
| City | Notre Dame, IN |
| Period | 6/4/12 → 6/8/12 |
Keywords
- Backward can extrusion
- Cold forging
- Friction
- Limits of lubrication
ASJC Scopus subject areas
- Industrial and Manufacturing Engineering
- Mechanical Engineering