Characteristics of cutting forces and chip formation in machining of titanium alloys

Sun, S., Brandt, M. and Dargusch, M.S. (2009) Characteristics of cutting forces and chip formation in machining of titanium alloys. INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE, 49 7-8: 561-568. doi:10.1016/j.ijmachtools.2009.02.008


Author Sun, S.
Brandt, M.
Dargusch, M.S.
Title Characteristics of cutting forces and chip formation in machining of titanium alloys
Journal name INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE   Check publisher's open access policy
ISSN 0890-6955
Publication date 2009-06-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.ijmachtools.2009.02.008
Volume 49
Issue 7-8
Start page 561
End page 568
Total pages 8
Editor Dean, T.A.
Place of publication United States
Publisher Elsevier Inc.
Collection year 2010
Language eng
Subject C1
861299 Fabricated Metal Products not elsewhere classified
091207 Metals and Alloy Materials
Abstract Chip formation during dry turning of T16Al4V alloy has been examined in association with dynamic cutting force measurements under different cutting speeds, feed rates and depths of cut. Both continuous and segmented chip formation processes were observed in one cut under conditions of low cutting speed and large feed rate. The slipping angle in the segmented chip was 55, which was higher than that in the continuous chip (38 degrees). A cyclic force was produced during the formation of segmented chips and the force frequency was the same as the chip segmentation frequency. The peak of the cyclic force when producing segmented chips was 1.18 times that producing the continuous chip. The undeformed surface length in the segmented chip was found to increase linearly with the feed rate but was independent of cutting speed and depth of cut. The cyclic force frequency increased linearly with cutting speed and decreased inversely with feed rate. The cutting force increased with the feed rate and depth of cut at constant cutting speed due to the large volume of material being removed. The increase in cutting force with increasing cutting speed from 10 to 16 and 57 to 75 m/min was attributed to the strain rate hardening at low and high strain rates, respectively. The decrease in cutting force with increasing cutting speed outside these speed ranges was due to the thermal softening of the material. The amplitude variation of the high-frequency cyclic force associated with the segmented chip formation increased with increasing depth of cut and feed rate, and decreased with increasing cutting speed from 57 m/min except at the cutting speeds where harmonic vibration of the machine occurs.
Keyword Machining
TI-6AL-4V
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Mechanical & Mining Engineering Publications
 
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Created: Thu, 03 Sep 2009, 18:09:45 EST by Mr Andrew Martlew on behalf of School of Mechanical and Mining Engineering