scholarly journals FEM Analysis on Serrated Chip Formation of Titanium Alloy. (1st Report). FEM Formulation and a Few Results.

1992 ◽  
Vol 58 (6) ◽  
pp. 1072-1078 ◽  
Author(s):  
Toshiyuki OBIKAWA ◽  
Eiji USUI
Keyword(s):  
Titanium Alloy ◽  
Chip Formation ◽  
Fem Analysis ◽  
Serrated Chip ◽  
Serrated Chip Formation

FEA Simulation of the Influence of Cutting Parameters on Serrated Chip Formation in Machining Titanium Alloy Ti-6Al-4V

2012 ◽  
Vol 500 ◽  
pp. 152-156
Author(s):  
Zeng Hui Jiang ◽  
Ji Lu Feng ◽  
Xiao Ye Deng
Keyword(s):  
Titanium Alloy ◽  
Chip Formation ◽  
Orthogonal Cutting ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Element Model ◽  
Serrated Chip ◽  
Wide Range ◽  
Serrated Chip Formation ◽  
Fea Simulation

A finite element model of a two dimensional orthogonal cutting process is developed. The simulation uses standard finite software is able to solve complex thermo-mechanical problems. A thermo-visco-plastic model for the machined material and a rigid cutting tool were assumed. One of the main characteristic of titanium alloy is serrated shape for a wide range of cutting conditions. In order to understand the influence of cutting parameters on the chip formation when machining titanium alloy Ti-6Al-4V. The influence of the cutting speed,the cutting depth and the feed on the chip shape giving rise to segmented chips by strain localisation is respectively discussed.

Chip Formation of Highly Efficient Cutting Titanium Alloy Membrane Disk

2010 ◽  
Vol 33 ◽  
pp. 549-554
Author(s):  
Shu Cai Yang ◽  
Min Li Zheng ◽  
Yi Hang Fan
Keyword(s):  
Titanium Alloy ◽  
Cutting Force ◽  
Chip Formation ◽  
Fem Analysis ◽  
Cutting Conditions ◽  
Machining Process ◽  
Thin Wall ◽  
Variable Cross ◽  
Serrated Chip ◽  
Membrane Disk

Titanium alloy membrane disk is a typical part in aerial engine and it belongs to variable cross-section thin-wall part, which is apt to change its nature and difficult to machine. Serrated chip is prone to create in the machining process. A periodic serrated chip will cause high frequency undulation of the cutting force, and further leads to the cutting tool wear and affect the surface’s integrity. Based on the turning of titanium membrane disk, this paper used metallographic microscope and SEM to observe the morphology and micro shape of the chip, and analyzed the influence of cutting conditions on chip formation and the reason for serrated chip. Finally, a FEM analysis on the chip formation process is completed. Analysis results show that under all the set cutting conditions the serrated chip was formed in the machining process. The shearing slippage and fracture caused by dislocation movement can better explain the formation mechanism of serrated chip. The feed rate has great effect on the chip formation and the forming frequency of serrated chip. The FEM analysis results primly consistent with the experiment results, which can accurately forecast the cutting force, the distribution of temperature and the surface quality.

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