AISI 1040 çeliğin tornalamasında kesme parametrelerinin kesme kuvvetine etkisi

Abstract

Teknolojide büyük öneme sahip olan talaşlı imalatta istenilen boyutta ve hassas bitirme yüzeyinde parça elde edebilmek en önemli amaçtır. Şu ana kadar yapılan pek çok çalışma bunun içindir. Bu çalışmada da, kuru şartlar altında imalat sanayisinde genişçe kullanımı olan AISI 1040 çeliğin tornalamasında oluşan kesme kuvvetlerinin, kesme parametreleri (kesme hızı, ilerleme, kesme derinliği) ile değişimi araştırılmıştır. Deneyler (CNMG 120404-NM KLP 115) formundaki sementit karbür kesme takımı kullanılarak yapılmıştır. İşlemler üç farklı kesme hızında (87 m/dak, 143 m/dak, 238 m/dak), üç farklı ilerlemede (0.052 mm/dev, 0.104 mm/dev, 0.162 mm/dev) ve üç farklı kesme derinliğinde (0.5 mm, 1 mm. 1.5 mm) gerçekleştirilmiştir. 250 mm uzunluk ve 50 mm çapında AISI 1040 çeliği kullanılarak toplam 27 adet deney yapılmıştır. Farklı kesme şartları altında dinamometre yardımıyla ölçülen kesme kuvvetleri Dynoware programı ile analiz edilmiştir. Analiz edilen bu kesme kuvvetleri ile kesme parametreleri arasındaki ilişkiyi belirlemek amacıyla grafikler oluşturulup yorumlanmaya çalışılmıştır. Bir başka ifadeyle optimum kesme şartları belirlemeye çalışılmıştır. Elde edilen sonuçlara göre kesme parametrelerinin kesme kuvvetini önemli bir biçimde etkilediği görülmüştür.

Keywords

• Tornalama, kesme kuvvetleri, kesme parametreleri, yüzey pürüzlülüğü

The effect of cutting parameters on cutting force at AISI 1040 steel turning

Abstract

The main objective of the research is based on machining surface roughness of the desired product as a minimum. We can see reseached a lot of parameters that affect the surface roughness in the past studies. Cutting force is the most important of parameters on surface roughness. For this reason, it was researched a lot about cutting force. Especially, it was investigated why cutting force changes In this study, it was researched connection between cutting force and cutting parameters (cutting speed, feed rate, depth of cut) on turning under dry cutting conditions. If we can find optimum cutting parameters to determined better cutting force, we can obtain the best surface roughness value. This is extreme important. All studies are this reason. AISI 1040 which is widely used in the manufacturing industry, was used as the workpiece material in experimentes. It is used on vehicle, engine, machinery and apparatus for making medium forced parts, traction hooks, gears, shafts. It is alloyed steels. It is also known as carbon steel because it contains a high ratio carbon contenent. The experiments are performed SMARC LC360B brand lathe. The maximum speed of the machine with a digital measuring system is 2000 rev/min. It has 2.2 kW engine power. The experiments were done with cemented carbur cutting team which is CNMG 120404-NM KLP 115 form. The machining tests were carried out at three different cutting speed (87 m/min, 143 m/min, 238 m/min), at three different feed rate (0.052 mm/rev, 0.104 mm/rev, 0.162 mm/rev) and at different depth of cut. Using 250 mm length and 50 diameter AISI 1040 steel as workpiece were carried out total of 27 machining tests. Three workpiece was used and each piece of work was done on 9 test because the top of the machined surface for failure to perform another operation. Each experiment was carried out for about 20 seconds. Measured cutting force thanks to dinamometer under different cutting conditions were analysied with Dynoware programme on computer. It was measured average value of cutting force (Fc) on Dynoware programme. To definite relation between analysed the cutting forces and cutting parameters, charts were obtained and tried to explain. In other words, optimum cutting parameters were tried to obtain. According to obtained results, it was shown that cutting parameters (cutting speed, feed rate and depth of cut) clearly affected cutting force. In other word, cutting force changed because cutting parameter values were changed. Altough cutting force decreased when cutting speed increased, it increased when feed rate and depth of cut increased. So, cutting parameters are very important to cutting force.

Keywords

• Turning, cutting force, cutting parameters, surface roughness.