2 results listed
The most important components of the bearings are
the inner and outer bearing rings. The raceway is the most
important feature constituting the bearing rings. Grinding and
super finishing operations are applied to attain tight tolerances
and very low surface roughness in the raceway. In this study,
the effect of the cutting parameters on the cutting forces and
surface roughness in turning of the outer bearing ring raceway,
made from hardened AISI 52100 steel, was investigated by
using cubic boron nitride (CBN) cutting tool instead of
grinding. The cutting forces occurred in hard turning of the
outer bearing rings were measured using a piezoelectric cutting
force measurement unit. It was seen that the radial cutting
forces acting on the outer ring raceway were higher than the
primary forces. The feed force at the end of the raceway form
was higher than that at the start point of the form. The lowest
surface roughness was obtained at 0.04 mm/rev feed rate.
International Iron & Steel Symposium
UDCS
Mehmet BOY
İbrahim ÇİFTÇİ
Feridun Özhan
Genel olarak üç boyutlu (3D) yazdırma veya hızlı prototipleme olarak bilinen eklemeli imalat (AM),
1980'lerin sonlarından beri kullanılmaktadır. 3D yazdırma teknolojisindeki gelişmeler, 4D yazdırma
adı verilen yeni ve heyecan verici bir teknolojinin geliştirilmesine yol açmıştır. 4D yazdırma, dış
uyarıcılara yanıt veren önceden programlanmış “akıllı malzeme” kullanımı ile sağlanır. Bu, “4D
yazdırma” olarak bilinir ve dördüncü boyutta zamana atıfta bulunur. Akıllı malzemelerin piyasaya
sürülmesiyle, imal edilmiş bileşenler, uygulanan dış uyarıcılara bir cevap olarak zaman içerisinde
şeklini veya özelliklerini değiştirebilir. Bu çalışmada, ilk önce 3D ve 4D yazdırma hakkında genel
bilgi verilmiştir. Daha sonra 4D yazdırmadaki son teknolojik gelişmeler, yöntemler, akıllı malzemeler
ve bunların uygulamalarına odaklanarak özetlenmiştir. Sonuç olarak akıllı malzemelerin güncel
gelişmeleri ve uygulamaları ile 4D yazdırma teknolojisindeki kullanımı genel olarak ele alınmıştır. Additive manufacturing (AM), commonly known as three-dimensional (3D) printing or rapid
prototyping, has been introduced since the late 1980s. The developments of 3D printing technology
have led to the development of an exciting new technology called 4D printing. 4D printing enables
the use of ‘smart materials’ that can transform in a pre-programmed way in response to an external
stimuli. This is known as ‘4D printing’, with the fourth dimension referring to time. With the
introduction of smart materials, the AM- fabricated components are able to alter their shape or
properties over time as a response to the applied external stimuli. In this review, we first overview of
3D and 4D printing. We then summarize recent technological advances in 4D printing with focuses on
methods, smarts materials, and their applications. This paper overviews the current developments and
applications of smart materials and its use in 4D printing technology.
International Congress on 3D Printing (Additive Manufacturing) Technologies and Digital Industry
3D-PTC2019
Mehmet BOY
Halil DEMİR
Serhat Orkun TAN