Details
| Original language | English |
|---|---|
| Pages (from-to) | 40-46 |
| Number of pages | 7 |
| Journal | CIRP Journal of Manufacturing Science and Technology |
| Volume | 58 |
| Early online date | 5 Feb 2025 |
| Publication status | E-pub ahead of print - 5 Feb 2025 |
Abstract
The use of cooling lubricant (CL) in machining influences the thermo-mechanical load of the tool and can increase both the workpiece quality and the metal removal rate. However, a targeted design of the CL supply strategy is not possible due to a lack of basic knowledge on the mechanisms of cooling lubricants. Therefore, the mechanical load on the cutting wedge is investigated in dependence of the CL-supply pressure for a cutting oil and an emulsion. It can be seen that the maximum normal stress increases with increasing CL-pressure due to a reduction in contact length. The maximum tangential stress shows a minimum for p = 45 bar and therefore a reduction in mechanical tool load when using cooling lubricants. The friction in the secondary shear zone is analysed using local coefficients of friction and an open contra-rotation tribometer. A critical contact length CLRF,crit has been determined where a significant reduction in friction as a result of the lubrication of the chip-tool contact occurs for an increasing contact at the rake face. In order to investigate the contact conditions in the presence of CL fundamental tribometer investigations were conducted. Based on this it is shown that there is no penetration to the cutting edge near the primary shear zone using CL-supply from the rake face.
Keywords
- Chip formation, Cooling lubricant, Cutting, Friction, Lubrication
ASJC Scopus subject areas
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: CIRP Journal of Manufacturing Science and Technology, Vol. 58, 06.2025, p. 40-46.
Research output: Contribution to journal › Review article › Research › peer review
}
TY - JOUR
T1 - Influence of cooling lubricants on mechanical load at the cutting wedge using high-speed microcinematography and an open-contra rotation tribometer
AU - Denkena, Berend
AU - Poll, Gerhard
AU - Bergmann, Benjamin
AU - Pape, Florian
AU - Nassef, Belal
AU - Schenzel, Jan
N1 - Publisher Copyright: © 2025 The Authors
PY - 2025/2/5
Y1 - 2025/2/5
N2 - The use of cooling lubricant (CL) in machining influences the thermo-mechanical load of the tool and can increase both the workpiece quality and the metal removal rate. However, a targeted design of the CL supply strategy is not possible due to a lack of basic knowledge on the mechanisms of cooling lubricants. Therefore, the mechanical load on the cutting wedge is investigated in dependence of the CL-supply pressure for a cutting oil and an emulsion. It can be seen that the maximum normal stress increases with increasing CL-pressure due to a reduction in contact length. The maximum tangential stress shows a minimum for p = 45 bar and therefore a reduction in mechanical tool load when using cooling lubricants. The friction in the secondary shear zone is analysed using local coefficients of friction and an open contra-rotation tribometer. A critical contact length CLRF,crit has been determined where a significant reduction in friction as a result of the lubrication of the chip-tool contact occurs for an increasing contact at the rake face. In order to investigate the contact conditions in the presence of CL fundamental tribometer investigations were conducted. Based on this it is shown that there is no penetration to the cutting edge near the primary shear zone using CL-supply from the rake face.
AB - The use of cooling lubricant (CL) in machining influences the thermo-mechanical load of the tool and can increase both the workpiece quality and the metal removal rate. However, a targeted design of the CL supply strategy is not possible due to a lack of basic knowledge on the mechanisms of cooling lubricants. Therefore, the mechanical load on the cutting wedge is investigated in dependence of the CL-supply pressure for a cutting oil and an emulsion. It can be seen that the maximum normal stress increases with increasing CL-pressure due to a reduction in contact length. The maximum tangential stress shows a minimum for p = 45 bar and therefore a reduction in mechanical tool load when using cooling lubricants. The friction in the secondary shear zone is analysed using local coefficients of friction and an open contra-rotation tribometer. A critical contact length CLRF,crit has been determined where a significant reduction in friction as a result of the lubrication of the chip-tool contact occurs for an increasing contact at the rake face. In order to investigate the contact conditions in the presence of CL fundamental tribometer investigations were conducted. Based on this it is shown that there is no penetration to the cutting edge near the primary shear zone using CL-supply from the rake face.
KW - Chip formation
KW - Cooling lubricant
KW - Cutting
KW - Friction
KW - Lubrication
UR - http://www.scopus.com/inward/record.url?scp=85216864408&partnerID=8YFLogxK
U2 - 10.1016/j.cirpj.2025.01.010
DO - 10.1016/j.cirpj.2025.01.010
M3 - Review article
AN - SCOPUS:85216864408
VL - 58
SP - 40
EP - 46
JO - CIRP Journal of Manufacturing Science and Technology
JF - CIRP Journal of Manufacturing Science and Technology
SN - 1755-5817
ER -