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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