scholarly journals On the Influence of Work Material Microstructure on Chip Formation, Cutting Forces and Acoustic Emission When Machining Ti-6Al-4V

Procedia CIRP ◽  
2013 ◽  
Vol 12 ◽  
pp. 55-60 ◽  
Author(s):  
S. Cedergren ◽  
G. Petti ◽  
G. Sjöberg
Keyword(s):  
Acoustic Emission ◽  
Chip Formation ◽  
Cutting Forces ◽  
Material Microstructure ◽  
Work Material ◽  
On Chip

Chip Formation in High-Speed Cutting of Copper and Aluminum

1963 ◽  
Vol 85 (4) ◽  
pp. 365-372 ◽  
Author(s):  
K. J. Trigger ◽  
B. F. von Turkovich
Keyword(s):  
Plastic Deformation ◽  
Chip Formation ◽  
High Speed ◽  
Metal Cutting ◽  
Initial Temperature ◽  
High Speed Machining ◽  
High Speed Cutting ◽  
Work Material ◽  
On Chip ◽  
Cutting Behavior

This paper presents metal-cutting data for the high-speed machining of copper and aluminum, each at two levels of purity, and over a range of workpiece temperatures from −326 deg F (80 deg K) to 550 deg F (560 deg K). It has been found that cutting behavior is influenced by purity of work material, its initial temperature, and extent of tool-chip contact. The influence of plastic deformation on chip hardness has been found to be intimately associated with the purity of the work material.

The effects of cryogenic cooling on chips and cutting forces in turning AISI 1040 and AISI 4320 steels

2002 ◽  
Vol 216 (5) ◽  
pp. 713-724 ◽  
Author(s):  
N R Dhar ◽  
Nanda S V Kishore ◽  
S Paul ◽  
A B Chattopadhyay
Keyword(s):  
Chip Formation ◽  
Cutting Forces ◽  
Substantial Reduction ◽  
Cutting Temperature ◽  
Environmentally Friendly ◽  
Cryogenic Cooling ◽  
Experimental Investigations ◽  
High Production ◽  
On Chip

Application of conventional cutting fluids often cannot control the high cutting temperatures, especially in high production machining. In addition, they are a major source of pollution in machining industries. Cryogenic cooling is a potential environmentally friendly clean technology for desirable control of the cutting temperature. The present work deals with experimental investigations on the role of cryogenic cooling by liquid nitrogen jets on chip formation and cutting forces in turning AISI 1040 steel and AISI 4320 steel at industrial speed—feed combinations by two types of carbide inserts of different geometrical configurations. The experimental results indicate the possibility of a substantial reduction in cutting forces by cryogenic cooling, which enabled a reduction in cutting forces by favourable chip formation, chip—tool interaction and also retention of tool sharpness due to reduced cutting temperature. Thus cryogenic cooling, if properly employed, is not only environmentally friendly but can also improve machinability characteristics.

Effect of bevelling of carbide turning inserts on chip formation and cutting forces

1991 ◽  
Vol 28 (1-2) ◽  
pp. 15-24 ◽  
Author(s):  
C. Sikdar ◽  
S.S. Babu ◽  
A.B. Chattopadhyay ◽  
V.C. Venkatesh
Keyword(s):  
Chip Formation ◽  
Cutting Forces ◽  
On Chip

scholarly journals Towards Dry Machining of Titanium-Based Alloys: A New Approach Using an Oxygen-Free Environment

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1161
Author(s):  
Hans Jürgen Maier ◽  
Sebastian Herbst ◽  
Berend Denkena ◽  
Marc-André Dittrich ◽  
Florian Schaper ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Wear Mechanism ◽  
Chip Formation ◽  
Cutting Forces ◽  
High Vacuum ◽  
Argon Atmosphere ◽  
Dry Machining ◽  
New Approach ◽  
Underlying Mechanisms ◽  
Free Environment

In the current study, the potential of dry machining of the titanium alloy Ti-6Al-4V with uncoated tungsten carbide solid endmills was explored. It is demonstrated that tribo-oxidation is the dominant wear mechanism, which can be suppressed by milling in an extreme high vacuum adequate (XHV) environment. The latter was realized by using a silane-doped argon atmosphere. In the XHV environment, titanium adhesion on the tool was substantially less pronounced as compared to reference machining experiments conducted in air. This goes hand in hand with lower cutting forces in the XHV environment and corresponding changes in chip formation. The underlying mechanisms and the ramifications with respect to application of this approach to dry machining of other metals are discussed.

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