1. Fundamentals of Mechanical Engineering Experiments for Graduate Study By Numchoak Sabangban Department of Mechanical Engineering Khonkaen University 1

2. Paper topic reviews Die wear in stamping of advanced high strength steels Investigations on the effects of substrate material and hard-coatings. Tribo-characterization of silicon doped and nano-structured DLC coatings by metal forming simulators. Cutting performance of TiAlSiN-coated tool by a hybrid-coating system for high-hardened materials. Performance of CrN radical nitride tools on deep drawing of advanced high strength steel. Experimental analysis of coating layer behavior of AlSi-coated boron steel in a hot bending process for IT applications. AN EXPERIMENTAL MODELLING AND NUMERICAL FE ANALYSIS OF STEEL-STRIP IRONING PROCESS. Prediction of process conditions in drawing and ironing of cans. Deep Drawing Analysis of Aluminum Material for Process of Manufacturing Battery Case for Vehicle. Finite Element Simulation of Multi-Stage Deep drawing Processes & Comparison with Experimental Results. Enhancement of dimple formability in sheet metals by 2-step forming. 2

3. Die wear in stamping of advanced high strength steels Investigations on the effects of substrate material and hard-coatings. Authors : Omer NecatiCora, AliAgcayaz a,b, KunioNamiki , HasanSofuoglu , MuammerKoc. Method and materials : Using CNC - base wear test setup to find the wear rate of 4 materials coating (DC 53 + TD, DC 53+Radical Nitriding + TiCN , DC 53 + TiCN , DC 53 + TiC+TiCN+TiN ) 3

4. Results and conclusions : From this study the wear rate was shown that the performance of materials coating. The best of wear resistance was a DC 53 + TiCN (PVD) in the CNC slider type wear tester, it was observed that increased hardness resulted in higher wear resistance as previously experienced. 4

5. Tribo-characterization of silicon doped and nano-structured DLC coatings by metal forming simulators. Authors : Kuniaki Dohda, Tatsuhiko Aizawa. Method and materials : Using DLC (Diamond like carbon 4 type) coating on the die specimen and find the friction coefficient form Prepare the materials coating by CVD (Chemical vapor deposition methods) Pin on disc in experiment. And keep the data to ironing simulation by using reduction thickness 5%, 10% and 20%. 5

6. Results and conclusions : The difference coating was shown the difference friction coefficient in this figure. In this study was investigate the COF in the reduction thickness of ironing, that was shown the minimum COF at the reduction thickness at 5 and 15 percent with Si-DLC coating. Furthermore, this simulation will provide the trend direction for selection of suitable coating method for prolonging the engineering durability by advancing the DLC coating. 6

7. Cutting performance of TiAlSiN-coated tool by a hybrid-coating system for high-hardened materials. Authors : Jeong Suk Kim, Gyeng Joong Kim, Myung Chang Kang, Jung Wook Kim, Kwang Ho Kim Method and materials : Using AIP (Arc Ion Plating) and high speed cutting to study the relation ship between tool wear and tool life of Ti Al Si N coating by various spindle speed. 7

8. Results and conclusions : For the test study the hardness of specimen was increase by Si from As the Si content increased, the hardness values of the TiAlSiN films steeply increased, and reached a maximum value of approximately 50 GPa at Si content of 9 at.%. Tool life of TiAlSi (19 at.%)N-coated tool in high speed machining was longer than that of TiAlSi (6 at.%)N-coated tool due to the self-lubricating tribo layers though its hardness is lower than the hardness of TiAlSi (6 at.%)N film. 8

9. Performance of CrN radical nitride tools on deep drawing of advanced high strength steel. Authors : B. Sresomroeng, V. Premanond , P. Kaewtatip , A. Khantachawana , A. Kurosawa , N. Kog Method and materials : Find the performance of CrN film coating to reduce scratch during on ball on - disc process by evaluate between film coating (CrN, TiN radical Nitride and CrN radical Nitride), and determine the friction coefficient in deep drawing process. 9

10. Results and conclusions : Several conclusions can be drawn from the results of the study CrN film coating of tools was effective in reducing the friction coefficient in relative movement with SPFC 980Y material under dry Conditions. Radical nitriding before coating of hard thin films increased the bond strength between the coated film and substrate. Therefore, the radical nitrided tool has a high performance on deep drawing of advance high strength steel sheet. 10

11. Experimental analysis of coating layer behavior of AlSi-coated boron steel in a hot bending process for IT applications. Authors : Yong-Phil Jeon , Hyung-Yoon Seo , Jong-Deok Kim and Chung-Gil Kang Method and materials : Using the AlSi-coated boron steel after the hot bending test to find the hardness and friction coefficient were tested by a nano-indenter at various positions. 11

12. Results and conclusions : In this contribution, AlSi-coated boron sheets that were formed in a hot bending process were investigated by using EDSSEM and a nano-indenter Different values of the coating layer hardness resulted in different friction coefficients. The blank holding force did not affect the experimental results significantly. Most of the COF was cause by scratching on the coating layer and the maximum COF was depend on 900 C and blank holder force at 20 kN. 12

13. AN EXPERIMENTAL MODELLING AND NUMERICAL FE ANALYSIS OF STEEL-STRIP IRONING PROCESS. Authors : Dragan Adamovic, Vesna Mandic, Zoran Jurkovic, Branko Grizelj,Milentije Stefanovic, Tomislav Marinkovic, Srbislav Aleksandrovic Method and materials : Using finite element and experiment of aluminum on U blending type in strip reduction ironing and various the reduction angle to estimate the friction coefficient . 13

14. Results and conclusions : Numerical FE simulation enables the prediction of important output parameters of the process during deformation, such as wall tension stress, strain, temperature, ironing force course etc., in dependence on input parameters (die angle, die force, friction conditions ). In case of reduction degree 5o has been maximum COF on the punch because in this case the ratio between punch and die was higher. By numerical simulations it is possible to know the distribution of wall stress in each cross section and the entire sliding path, as well as to determine deformation forces of ironing process. The thickness reduction, die force and COF was increase by reduction angle 14

15. Prediction of process conditions in drawing and ironing of cans. Authors : Marco Schunemann, Mustafa A. Ahmetoglu, and Taylan Altan Method and materials : Using multi pass ironing to investigate the temperature, wall stress and punch force during the ironing die and punch stroke. 15

16. Results and conclusions : Numerical FE simulation was shown the similar trend line to predict the temperature and flow stress At the point 1 has been maximum temperature on the first step of ironing. The Aluminum ( AA 303 r =-0.301) was minimum punch force to forming because that case has a higher temperature depending on the process. 16

17. Deep Drawing Analysis of Aluminum Material for Process of Manufacturing Battery Case for Vehicle Authors : J. Y. Kim, K. S. Kim, Method and materials : Using sequential forming, it begins with a first drawing process using raw material that is shaped in an oval form, followed by the development of the final-shape of the product in progressive steps involving redrawing and ironing processes. And find the thickness of finishing part. 17

18. Results and conclusions : Numerical FE simulation was shown the similar trend line to predict the temperature and flow stress The measurement results and thickness change for the manufactured sample showed that the experimental results for the thickness distribution along the long and short axes were similar to those in the analysis results, showing a relative thickness deviation of approximately 2%. 18

19. Finite Element Simulation of Multi-Stage Deep Drawing Processes & Comparison with Experimental Results. Authors : A. Pourkamali Anaraki, M. Shahabizadeh, and B. Babaee Method and materials : Verify experiment by using finite element to find the punch force in difference stroke and residual stress in the blank by chooses the aluminum alloy 7075-O. 19

20. Results and conclusions : Comparison of experimental and FEM simulation results on the multi-stage drawing process were performed in this study Residual stresses are lesser in central area of blank and those are rising with proceeding in next stages. Finite element modeling (FEM) can accurately portray forming from a particular die design without the need for costly trial and error. With simulation via FEM, designers can estimate field variables such as strain distribution, stress distribution, material flow and forming defects. 20

21. Enhancement of dimple formability in sheet metals by 2-step forming. Authors : Minsoo Kim, Sungsik Bang, Hyungyil Lee, Naksoo Kim, Dongchoul Kim Method and materials : Using Zircaloy 4 type (Anisotropy) in the 2 step stamping model and validation by FE to find the weak point, that was cause dimple crack in forming process. 21

22. Results and conclusions : In this study, FE analysis is performed for [only] one of several dimples but which represents the whole stamping. 1-step stamping model cannot be explained by pure bending since in pure bending, thicknesses are identical before and after bending, the FE solutions are obtain various for the first stamping tools to find weak point at the edge area, that will be change the step to forming . 22

23. Thank you for attentions 23