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5 ), 23-25 Ekim 2014 Bursa
367
-ve Ti-6Al-
Mustafa ubilay v Ucun
zet
-6Al-
Anahtar kelimeler: Mikro delik delme, Ti-6Al-
MICRO-MECHANICAL DRILLING PROCESS and AN EXPERIMENTAL STUDY FOR Ti-6Al-4V
Abstract
This paper presents a series of experimental study on the influence of cutting parameters and cooling conditions on the efficiency of micro drilling of Ti-6Al-4V. The variations of burr size, surface quality, cutting force and torque have been investigated in detail for different cutting and cooling conditions. Besides, the wear mechanism and wear type of micro drill were also examined. The experimental results show that the cooling method does not affect too much the burr size at the exit point of drill. However, it is possible to say that the burr size is minimum when using cryogenic cooling. Additionaly, the roughness of input surface of the drill is greater than the value of output surface. The dominant wear mechanism is abrasive wear in micro drills and built-up formation was observed in all cutting enviroment.
Keywords: Micro drilling, Ti6Al4V, Minimum quantity lubrication, Cryogenic cooling
5 ), 23-25 Ekim 2014 Bursa
368
1. G
hem de
neden olabilir.
merkezinde [1]
inci derecede etkileyen
etkilemesi de kuvvetle muhtemeldir.
5 ), 23-25 Ekim 2014 Bursa
369
na neden
Maksimum ilerleme kuvveti: a) f:0,025mm/dev, V:40m/dk; b) f:0,05mm/dev, V:40m/dk; c) f:0,025mm/dev, V:60m/dk; d) f:0,05mm/dev, V:60m/dk;
a) Ortalama tork, hata her bi tork verilerinin
-6Al-4V malzemesinin
elektro-
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2. MATERYAL ve METOT
-6Al-rak, 700
kesme parametreleri Tablo 1 deki gibidir. Deneylerde; kuru
incelenmesi
ele
Tablo 1
Devir (dev/dak) (m/dak)
(mm)
1000 2,2 1,5 3
2500 5,5 1,5 5000 11 1,5 7500 16,5 1,5 9000 19,8 1,5 10000 22 0,5 10000 22 1,5 10000 22 2,5 10000 22 3,5
d1 d2 L1 L2
3mm 40mm 4mm 2
5 ), 23-25 Ekim 2014 Bursa
371
a)
b)
a)
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372
3.
-
-
kil 7- m ve fz=3,5-b de ise fz=1,5
artma
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373
ned-a ve 8-
rhangi bir -
-
-
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374
Vc=22m/dk
fz=1,5 m
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375
3.2
-a, 9- - -b -
ekil 10- -a dan da
lgesindeki
-a da dikkati
ifadesi
F2 > F1
5 ), 23-25 Ekim 2014 Bursa
376
utlu
ade etmektedir.
Delinen mikro delikle
Delme
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-a), kriyojenik (13-b) ve MQL (13-
nimum
a bertaraf
(a)
geometri
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4. Mikro
(c)
geometri
(b) Ageometri
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dina
etkisiyle kesici kenar ra
olsa etkis 5.
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380
KAYNAKLAR
[1] Kim, J., Min, S. Dornfeld, D. 2001. Optimization and Control of Drilling Burr Formation of AISI 304L and AISI 4118 Based on Drilling Burr Control Charts International Journal of Machine Tools & Manufacture, Volume-41, Pages 923-936
[2] Xia, T., 2014, Investigation of drilling performance in cryogenic drilling on CFRP composite laminates Mechanical Engineering in the College of Engineering at the University of Kentucky
[3] Hong, S., Ding, Y., Jeong, W., 2001, Friction and cutting forces in cryogenic machining of Ti-6Al-4V International Journal of Machine Tools & Manufacture, Volume-41, Pages 2271-2285
-6Al-
[5] Bhowmick, S., Lukitsch, M., Alpas, A., 2010, Dry and minimum quantinity lubrication drilling of cast magnesium alloy International Journal of Machine Tools & Manufacture, Volume-50, Pages 444-457
The effect of minimum quantity lubrication and cryogenic pre-cooling on cutting performance in the micro milling of Inconel 718 Proc IMechE Part B: J Engineering Manufacture, DOI: 10.1177/0954