Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 22nd International Conference of the European Society for Precision Engineering and Nanotechnology |
| Subtitle of host publication | 30th May-3rd June 2022, Geneva, CH : conference proceedings |
| Editors | Richard K. Leach, Asseinam Akrofi-Ayesu, Clare Nisbet, Dishi Phillips |
| Place of Publication | Bedford, UK |
| Pages | 539-542 |
| Number of pages | 4 |
| ISBN (electronic) | 9781998999118 |
| Publication status | Published - 2022 |
| Event | 22nd International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2022 - Geneva, Switzerland Duration: 30 May 2022 → 3 Jun 2022 |
Abstract
An important process in the manufacturing of semi-finished products is the sawing process. The chip formation takes place in a narrow, closed cutting gap. In the circular sawing process, there are no mechanisms for chip removal - for example, in comparison to flutes in drilling. The chip formed is enclosed in the chip space between the tool and the workpiece until the saw tooth exits the workpiece. The cutting tools are exposed to high thermal and mechanical loads, which require the use of cooling lubricants for heat dissipation, friction reduction between the material and the tool, and chip transport out of the cutting zone. Usually, flooding lubrication is used for sawing. However, depending on the shading of the cutting zone by the workpiece, tool or accumulating chips, only a fraction of the used coolant lubricant reaches the gaps between the chip, tool and workpiece. An internal coolant supply (ICS) through the tool system can be used to inject the coolant into the cutting zone in a targeted and controlled manner. For the process conditions in sawing, it is still unclarified which quantity of cooling lubricant, under which pressure and in which injection direction has to be applied to achieve an optimal cooling, lubricating and transport effect. The use of computational fluid dynamics (CFD) supports the investigation of a sawing process with internal coolant supply. This paper presents the modelling of the fluid mechanical process of the inflowing coolant inside the chip space in the narrow cutting gap. This includes the definition of the system boundaries. A porous boundary condition was used to set a controlled pressure loss within the chip space. The focus of this paper is on the meshing and the selection of a suitable turbulence model. The k-omega shear stress transport (SST) proved to be the most suitable model for this application.
Keywords
- Cutting, Fluid, Simulation
ASJC Scopus subject areas
- Engineering(all)
- Industrial and Manufacturing Engineering
- Engineering(all)
- Mechanical Engineering
- Environmental Science(all)
- Environmental Engineering
- Materials Science(all)
- Physics and Astronomy(all)
- Instrumentation
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Proceedings of the 22nd International Conference of the European Society for Precision Engineering and Nanotechnology: 30th May-3rd June 2022, Geneva, CH : conference proceedings. ed. / Richard K. Leach; Asseinam Akrofi-Ayesu; Clare Nisbet; Dishi Phillips. Bedford, UK, 2022. p. 539-542.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Modelling of the coolant flow behaviour in the narrow-closed cutting gap during sawing with internal coolant supply
AU - Menze, Christian
AU - Xiang, Jiawen
AU - Möhring, Hans Christian
AU - Stegmann, Jan
AU - Kabelac, Stephan
AU - Tismer, Alexander
AU - Wack, Jonas
AU - Riedelbauch, Stefan
N1 - Funding Information: The authors appreciate the funding of this work within the Priority?Program?2231?“Efficient?cooling,?lubrication?and? transportation – coupled mechanical and fluid-dynamical simulation methods for efficient production processes (FLUSIMPRO)”?by?the?German?Research?Foundation?(DFG)?– project number 439925537.
PY - 2022
Y1 - 2022
N2 - An important process in the manufacturing of semi-finished products is the sawing process. The chip formation takes place in a narrow, closed cutting gap. In the circular sawing process, there are no mechanisms for chip removal - for example, in comparison to flutes in drilling. The chip formed is enclosed in the chip space between the tool and the workpiece until the saw tooth exits the workpiece. The cutting tools are exposed to high thermal and mechanical loads, which require the use of cooling lubricants for heat dissipation, friction reduction between the material and the tool, and chip transport out of the cutting zone. Usually, flooding lubrication is used for sawing. However, depending on the shading of the cutting zone by the workpiece, tool or accumulating chips, only a fraction of the used coolant lubricant reaches the gaps between the chip, tool and workpiece. An internal coolant supply (ICS) through the tool system can be used to inject the coolant into the cutting zone in a targeted and controlled manner. For the process conditions in sawing, it is still unclarified which quantity of cooling lubricant, under which pressure and in which injection direction has to be applied to achieve an optimal cooling, lubricating and transport effect. The use of computational fluid dynamics (CFD) supports the investigation of a sawing process with internal coolant supply. This paper presents the modelling of the fluid mechanical process of the inflowing coolant inside the chip space in the narrow cutting gap. This includes the definition of the system boundaries. A porous boundary condition was used to set a controlled pressure loss within the chip space. The focus of this paper is on the meshing and the selection of a suitable turbulence model. The k-omega shear stress transport (SST) proved to be the most suitable model for this application.
AB - An important process in the manufacturing of semi-finished products is the sawing process. The chip formation takes place in a narrow, closed cutting gap. In the circular sawing process, there are no mechanisms for chip removal - for example, in comparison to flutes in drilling. The chip formed is enclosed in the chip space between the tool and the workpiece until the saw tooth exits the workpiece. The cutting tools are exposed to high thermal and mechanical loads, which require the use of cooling lubricants for heat dissipation, friction reduction between the material and the tool, and chip transport out of the cutting zone. Usually, flooding lubrication is used for sawing. However, depending on the shading of the cutting zone by the workpiece, tool or accumulating chips, only a fraction of the used coolant lubricant reaches the gaps between the chip, tool and workpiece. An internal coolant supply (ICS) through the tool system can be used to inject the coolant into the cutting zone in a targeted and controlled manner. For the process conditions in sawing, it is still unclarified which quantity of cooling lubricant, under which pressure and in which injection direction has to be applied to achieve an optimal cooling, lubricating and transport effect. The use of computational fluid dynamics (CFD) supports the investigation of a sawing process with internal coolant supply. This paper presents the modelling of the fluid mechanical process of the inflowing coolant inside the chip space in the narrow cutting gap. This includes the definition of the system boundaries. A porous boundary condition was used to set a controlled pressure loss within the chip space. The focus of this paper is on the meshing and the selection of a suitable turbulence model. The k-omega shear stress transport (SST) proved to be the most suitable model for this application.
KW - Cutting
KW - Fluid
KW - Simulation
UR - http://www.scopus.com/inward/record.url?scp=85145606105&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85145606105
SP - 539
EP - 542
BT - Proceedings of the 22nd International Conference of the European Society for Precision Engineering and Nanotechnology
A2 - Leach, Richard K.
A2 - Akrofi-Ayesu, Asseinam
A2 - Nisbet, Clare
A2 - Phillips, Dishi
CY - Bedford, UK
T2 - 22nd International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2022
Y2 - 30 May 2022 through 3 June 2022
ER -