Details
| Original language | English |
|---|---|
| Title of host publication | METAL 2019 |
| Subtitle of host publication | 28th International Conference on Metallurgy and Materials, Conference Proceedings |
| Pages | 296-301 |
| Number of pages | 6 |
| ISBN (electronic) | 9788087294925 |
| Publication status | Published - 2019 |
| Event | 28th International Conference on Metallurgy and Materials, METAL 2019 - Brno, Czech Republic Duration: 22 May 2019 → 24 May 2019 |
Abstract
The development of tools in bulk metal forming for the production of steel components consists of an iterative development process and requires a large number of test tools, resulting in high costs as well as increased production time. The simulation of process steps on the basis of the finite element method is an established technique for tool design and provides a significant contribution to the optimization of processes in the development phase. Thermally and mechanically induced deviations from the desired component geometry occur due the forging process. The approximation of the actual to the target geometry of the component must be worked out in several iteration loops by adapting the process conditions, or by modifying the forming tools. A newly developed process-accompanying compensation strategy helps to reduce the deviations by modifying the forming tool and process conditions within the virtual product development phase. In that regard, the numerical investigation of a forging process has been carried out in this study. The influence of different process conditions and their influence on the workpiece deviation are investigated. For this purpose, first of all the material data such as flow curves and coefficients of thermal expansion are determined in experimental tests. The coefficients for an analytical flow curve approach called GMT, which is implemented in the commercial software simufact.forming are computed for the investigated steel grades 16MnCr5 and 42CrMo4. Finally, the flow curve approach was validated by comparing numerical and experimental results of a uniaxial compression test. Also the numerical results of the forging process with different initial forging temperatures are compared with each other and the deviations of the workpiece are discussed.
Keywords
- Bulk metal forming, FEM, GMT material model
ASJC Scopus subject areas
- Materials Science(all)
- Surfaces, Coatings and Films
- Engineering(all)
- Mechanics of Materials
- Materials Science(all)
- Metals and Alloys
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METAL 2019: 28th International Conference on Metallurgy and Materials, Conference Proceedings. 2019. p. 296-301.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Numerical investigation of thermal and mechanical deviations in a hot forging process of 16MnCr5 and 42CrMo4 steel
AU - Behrens, Bernd Arno
AU - Volk, Wolfram
AU - Chugreev, Alexander
AU - Till, Michael
AU - Maier, Daniel
AU - Büdenbender, Christoph
N1 - Funding information: The presented results are based on the framework of the research project “Development of a geometry based method for the compensation of process-related dimensional deviations of solid formed parts” under the grant number 334525444 (BE 1691/207-1). The authors would like to thank the German Research Foundation (DFG) for the financial support.
PY - 2019
Y1 - 2019
N2 - The development of tools in bulk metal forming for the production of steel components consists of an iterative development process and requires a large number of test tools, resulting in high costs as well as increased production time. The simulation of process steps on the basis of the finite element method is an established technique for tool design and provides a significant contribution to the optimization of processes in the development phase. Thermally and mechanically induced deviations from the desired component geometry occur due the forging process. The approximation of the actual to the target geometry of the component must be worked out in several iteration loops by adapting the process conditions, or by modifying the forming tools. A newly developed process-accompanying compensation strategy helps to reduce the deviations by modifying the forming tool and process conditions within the virtual product development phase. In that regard, the numerical investigation of a forging process has been carried out in this study. The influence of different process conditions and their influence on the workpiece deviation are investigated. For this purpose, first of all the material data such as flow curves and coefficients of thermal expansion are determined in experimental tests. The coefficients for an analytical flow curve approach called GMT, which is implemented in the commercial software simufact.forming are computed for the investigated steel grades 16MnCr5 and 42CrMo4. Finally, the flow curve approach was validated by comparing numerical and experimental results of a uniaxial compression test. Also the numerical results of the forging process with different initial forging temperatures are compared with each other and the deviations of the workpiece are discussed.
AB - The development of tools in bulk metal forming for the production of steel components consists of an iterative development process and requires a large number of test tools, resulting in high costs as well as increased production time. The simulation of process steps on the basis of the finite element method is an established technique for tool design and provides a significant contribution to the optimization of processes in the development phase. Thermally and mechanically induced deviations from the desired component geometry occur due the forging process. The approximation of the actual to the target geometry of the component must be worked out in several iteration loops by adapting the process conditions, or by modifying the forming tools. A newly developed process-accompanying compensation strategy helps to reduce the deviations by modifying the forming tool and process conditions within the virtual product development phase. In that regard, the numerical investigation of a forging process has been carried out in this study. The influence of different process conditions and their influence on the workpiece deviation are investigated. For this purpose, first of all the material data such as flow curves and coefficients of thermal expansion are determined in experimental tests. The coefficients for an analytical flow curve approach called GMT, which is implemented in the commercial software simufact.forming are computed for the investigated steel grades 16MnCr5 and 42CrMo4. Finally, the flow curve approach was validated by comparing numerical and experimental results of a uniaxial compression test. Also the numerical results of the forging process with different initial forging temperatures are compared with each other and the deviations of the workpiece are discussed.
KW - Bulk metal forming
KW - FEM
KW - GMT material model
UR - http://www.scopus.com/inward/record.url?scp=85079363291&partnerID=8YFLogxK
U2 - 10.37904/metal.2019.693
DO - 10.37904/metal.2019.693
M3 - Conference contribution
AN - SCOPUS:85079363291
SP - 296
EP - 301
BT - METAL 2019
T2 - 28th International Conference on Metallurgy and Materials, METAL 2019
Y2 - 22 May 2019 through 24 May 2019
ER -