Investigation of Temperature and Forces on Drilling GGG40 Materials with Carbide Drills on CNC Turning Machine Tools

Year 2017, Volume: 8 Issue: Ek (Suppl.) 1, 231 - 238, 16.11.2017

Muharrem Usta Yunus Kayır

https://doi.org/10.29048/makufebed.335605

Cited By: 1

Abstract

In
this study, drilling experiments were carried out on the CNC turning machine
tools. In the experiments, GGG40 material was drilled TiAlN coated and uncoated
carbide drills that was Ø14 mm and had internal cooling channels. The drilling
force (Fz) and moment (Mz) that were measured with a dynamometer. Moreover, the
temperature was measured using a thermocouple of Ø1 mm K type. The thermocouple
was positioned at the drill bit by passing through the internal cooling channels
of the carbide drill. Drilling experiments were performed by using 3 different
cutting speeds and 3 different feed rates. Experimental results show that
increasing of the feed rate goes up drilling force and moment. But, increasing of
the cutting speed goes down drilling force and moment. For all that, the
temperature decreases with increasing of the feed rate, and temperature steps
up due to increasing of the cutting speed.

Keywords

Drills, Cutting forces, Drilling, Temperature measurement, Force measurement

GGG40 Malzemesinin CNC Torna Tezgahında Karbür Matkaplarla Delinmesinde Sıcaklık ve Delme Kuvvetlerin Araştırılması

Abstract

Bu çalışmada CNC torna
tezgahında delik delme deneyleri yapılmıştır. Deneylerde GGG40 malzemesi, Ø14
mm TiAlN kaplamalı ve kaplamasız içten soğutmalı karbür matkaplar ile delinmiştir.
Deneyler sırasında oluşan, delik delme kuvveti (Fz) ve moment (Mz) bir
dinamometre ile sıcaklık ise Ø1 mm K tipi ısıl çift kullanılarak ölçülmüştür.
Isıl çifti, karbür matkabın iç soğutma kanallarından geçirilerek kesici ucuna
konumlandırılmıştır. Delik delme deneyleri, 3 farklı kesme hızı ve 3 farklı
ilerleme kullanılarak yapılmıştır. Elde edilen deney sonuçları, ilerleme
artıkça delme kuvveti ve momentin arttığı, kesme hızı arttıkça da delme kuvveti
ve momentin azaldığını göstermiştir. Bununla birlikte, sıcaklığın artan
ilerleme ile azaldığı, artan kesme hızına bağlı olarak artış gösterdiğini
ortaya koymuştur. 

Keywords

Matkaplar, Kesme kuvvetleri, Delik delme, Sıcaklık ölçme, Kuvvet ölçme

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