Abstract
This paper presents a new friction and lubrication test for cold forging. The test allows controlled variation of the surface expansion in the range 0-2000%, the tool temperature in the range 20-270°C and the sliding length between 0 and infinite. Friction is decreasing with increasing temperature in the range 30-150°C. Above this temperature range friction increases. As regards lubricant performance Lubrication Limit Curves (LLC) are plotted in a sliding length-surface enlargement diagram with the tool temperature as a parameter. Larger tool temperature implies lower acceptable surface expansion and sliding length.
Original language | English |
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Journal | CIRP Annals : Manufacturing Technology |
Volume | 44 |
Issue number | 1 |
Pages (from-to) | 217-221 |
ISSN | 0007-8506 |
DOIs | |
Publication status | Published - 1995 |
Keywords
- Forming
- friction
- lubrication