scholarly journals Generation Mechanism of Work Hardened Surface Layer in Metal Cutting. 3rd Report. Effect of Cutting Edge Roundness on Work Hardened Surface Layer.

2002 ◽  
Vol 68 (671) ◽  
pp. 2175-2180 ◽  
Author(s):  
Rikio HIKIJI ◽  
Eiji KONDO ◽  
Norio KAWAGOISHI ◽  
Minoru ARAI
Keyword(s):  
Surface Layer ◽  
Metal Cutting ◽  
Cutting Edge ◽  
Generation Mechanism ◽  
Hardened Surface

scholarly journals Generation Mechanism of Work Hardened Surface Layer in Metal Cutting

2004 ◽  
Vol 47 (1) ◽  
pp. 405-411 ◽  
Author(s):  
Rikio HIKIJI ◽  
Eiji KONDO ◽  
Norio KAWAGOISHI ◽  
Minoru ARAI
Keyword(s):  
Surface Layer ◽  
Metal Cutting ◽  
Generation Mechanism ◽  
Hardened Surface

Effect of Cutting Edge Roundness on Work Hardened Surface Layer in Metal Cutting

2009 ◽  
Vol 407-408 ◽  
pp. 440-443
Author(s):  
Rikio Hikiji ◽  
Eiji Kondo ◽  
Minoru Arai
Keyword(s):  
Surface Layer ◽  
Surface Integrity ◽  
Chip Thickness ◽  
Cutting Edge ◽  
Precision Machining ◽  
Machined Surface ◽  
Undeformed Chip Thickness ◽  
Ultra Precision ◽  
Machined Surface Integrity ◽  
Hardened Surface

In the ultra-precision machining, the smaller the undeformed chip thickness is, the more the machined surface integrity is affected by the cutting edge roundness of the cutting tool. In this research, the work hardened surface layer was dealt with as an evaluation of the machined surface integrity and the effect of the mechanical factors on work hardening was investigated experimentally in orthogonal cutting. In the case of a rounded cutting edge, unlike a sharp one, it makes the generation mechanism of the work hardened surface layer complicated. In this research, the mechanical dominant factors were investigated by comparing the effect of the rounded cutting edge on the work hardened surface layer, which counts for much in ultra precision machining involved in small undeformed chip thickness, with that of the sharp cutting edge.

scholarly journals SCC Behavior at Hardened Surface Layer of 316(LC) in Water on High Temperature

2009 ◽  
Vol 58 (6) ◽  
pp. 228-233 ◽  
Author(s):  
Kiyoko Takeda ◽  
Akira Taniyama ◽  
Takeo Kudo ◽  
Hitoshi Uchida ◽  
Jun-ichiro Mizuki
Keyword(s):  
Surface Layer ◽  
High Temperature ◽  
Hardened Surface

FEM Simulation of the Residual Stress in the Machined Surface Layer for High-Speed Machining

2006 ◽  
Vol 315-316 ◽  
pp. 140-144 ◽  
Author(s):  
Su Yu Wang ◽  
Xing Ai ◽  
Jun Zhao ◽  
Z.J. Lv
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Surface Layer ◽  
Residual Stresses ◽  
High Speed ◽  
Metal Cutting ◽  
Orthogonal Cutting ◽  
High Speed Machining ◽  
Machined Surface ◽  
Cutting Model

An orthogonal cutting model was presented to simulate high-speed machining (HSM) process based on metal cutting theory and finite element method (FEM). The residual stresses in the machined surface layer were obtained with various cutting speeds using finite element simulation. The variations of residual stresses in the cutting direction and beneath the workpiece surface were studied. It is shown that the thermal load produced at higher cutting speed is the primary factor affecting the residual stress in the machined surface layer.

Electrical Current at Metal Cutting Process: A Literature Review

2015 ◽  
Vol 808 ◽  
pp. 40-47 ◽  
Author(s):  
Raluca Daicu ◽  
Gheorghe Oancea
Keyword(s):  
Literature Review ◽  
Cutting Forces ◽  
Metal Cutting ◽  
Electrical Current ◽  
Cutting Edge ◽  
Cutting Process ◽  
Metallic Materials ◽  
Cutting Zone

Processing metallic materials by cutting using good electricity conductor cutting edges it appears an electrical current due mainly to the temperature in the cutting zone. Analyzing of the electrical current the information about the unfolding mode of the cutting process can be obtained. The cutting electrical current can be used in several applications: the estimation of the temperature in the cutting zone, the estimation of the cutting forces, the identification of the wear state of the cutting edge etc. The first researches were started in Russia and they were based on the utilization of the cutting electrical current to measure the temperature in the cutting zone. Afterwards, other applications were identified in the literature and the researches were extended in other countries like India, Japan, USA, Brazil, France, Bangladesh and Romania. This paper presents a review of the researches about the electrical current which appears at cutting process.

An Integral Method to Determine Workpiece Flow Stress and Friction Characteristics in Metal Cutting

2015 ◽  
Vol 9 (6) ◽  
pp. 775-781
Author(s):  
Norfariza Wahab ◽  
◽  
Yumi Inatsugu ◽  
Satoshi Kubota ◽  
Soo-Young Kim ◽  
...  
Keyword(s):  
Flow Stress ◽  
Strain Rate ◽  
Cutting Forces ◽  
High Speed ◽  
Metal Cutting ◽  
Cutting Edge ◽  
Cutting Process ◽  
Machining Parameters ◽  
Friction Characteristics ◽  
High Speed Cutting

In recent times, numerical simulation techniques have been commonly used to estimate and predict machining parameters such as cutting forces, stresses, and temperature distribution. However, it is very difficult to estimate the flow stress of a workpiece and the friction characteristics at a tool/chip interface, particularly during a high-speed cutting process. The objective of this study is to improve the accuracy of the present method and simultaneously determine the characteristics of the flow stress of a workpiece and friction at the cutting edge under a high strain rate and temperature during the cutting process. In this study, the Johnson-Cook (JC) flow stress model is used as a function of strain, strain rate, and temperature. The friction characteristic was estimated by minimizing the difference between the predicted and measured results of principal force, thrust force, and shear angle. The shear friction equation was used to estimate the friction characteristics. Therefore, by comparing the measured values of the cutting forces with the predicted results from FEM simulations, an expression for workpiece flow stress and friction characteristics at the cutting edge during a high-speed cutting process was estimated.

Formation of Nano-Sized Structural-Phase States in Surface Layers of a Cermet Alloy and the Influence of the States on the Tool Life of Cermet Plates in Metal Cutting

2015 ◽  
Vol 770 ◽  
pp. 144-150
Author(s):  
V.E. Ovcharenko ◽  
Yuriy F. Ivanov ◽  
A.A. Mohovikov ◽  
A.S. Ignatyev ◽  
Yu Baohai ◽  
...  
Keyword(s):  
Surface Layer ◽  
Tool Life ◽  
Metal Cutting ◽  
Structural Phase ◽  
High Energy ◽  
High Energy Electron ◽  
Surface Layers ◽  
Discharge Plasmas ◽  
Profound Influence ◽  
Cermet Alloy

A comparative analysis of the surface-layer microstructure of a tungsten-based cermet alloy modified with pulsed high-energy electron beams generated by gas-discharge plasmas and of the tool life of metal-cutting plates prepared from this alloy is performed. The choice of a plasma-forming gas providing for the emission of electrons out of the plasma-filled cathode is shown to have a profound influence both on the formation process of nanosized structural-phase states in the surface layer of the cermet alloy and on the tool life of the metal-cutting plates prepared from this alloy.

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