scholarly journals Finite element simulations of conventional and ultrasonically assisted turning processes with plane and textured cutting inserts

2019 ◽  
Vol 3 (1) ◽  
pp. 54-68
Author(s):  
Varun Sharma ◽  
Pulak M. Pandey ◽  
Uday S. Dixit ◽  
Anish Roy ◽  
Vadim V. Silberschmidt
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cutting Force ◽  
Cutting Forces ◽  
The Finite Element Method ◽  
Turning Process ◽  
Texture Pattern ◽  
Cutting Inserts ◽  
Force Variation ◽  
Element Method

This paper investigates the performance of conventional turning and ultrasonically assisted turning (UAT) processes with plane and textured cutting inserts. Simulations based on the finite-element method were carried out using a software package ABAQUS/Explicit (Dassault Systemes, France). The obtained results were validated experimentally by employing a specially developed UAT setup. The purpose of the paper is to analyze cutting-force variation by the use of textured cutting inserts. Optimized dimensions of the texture pattern were used to model textured cutting inserts. The cutting-force variation in UAT was assessed with finite-element method, confirming diminishing cutting forces at a tool–workpiece interface during a noncontact time. The use of the textured cutting inserts in the UAT process resulted in the lowest cutting forces when compared to a plane tool in UAT as well as both plane and textured tools in the conventional turning process.

scholarly journals Cutting Force Predication Based on Integration of Symmetric Fuzzy Number and Finite Element Method

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Zhanli Wang ◽  
Yanjuan Hu ◽  
Yao Wang ◽  
Chao Dong ◽  
Zaixiang Pang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cutting Force ◽  
Fuzzy Number ◽  
Experimental Result ◽  
The Finite Element Method ◽  
Mechanical Coupling ◽  
Fuzzy Function ◽  
Nonuniform Stress Field ◽  
Element Method

In the process of turning, pointing at the uncertain phenomenon of cutting which is caused by the disturbance of random factors, for determining the uncertain scope of cutting force, the integrated symmetric fuzzy number and the finite element method (FEM) are used in the prediction of cutting force. The method used symmetric fuzzy number to establish fuzzy function between cutting force and three factors and obtained the uncertain interval of cutting force by linear programming. At the same time, the change curve of cutting force with time was directly simulated by using thermal-mechanical coupling FEM; also the nonuniform stress field and temperature distribution of workpiece, tool, and chip under the action of thermal-mechanical coupling were simulated. The experimental result shows that the method is effective for the uncertain prediction of cutting force.

A Model for the Prediction of Form Errors in Face Milling and Turning

1999 ◽  
Author(s):  
Luc Masset ◽  
Jean-François Debongnie ◽  
Sylvie Foreau ◽  
Thierry Dumont
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cutting Forces ◽  
Experimental Validation ◽  
Industrial Applications ◽  
Face Milling ◽  
The Finite Element Method ◽  
Form Errors ◽  
Error Computation ◽  
Element Method

Abstract A method is proposed for predicting form errors due to both clamping and cutting forces in face milling and turning. It allows complex tool trajectories and workpiece geometries. Error computation is performed by the finite element method. An experimental validation of the model for face milling is presented. Two industrial applications are produced in order to demonstrate the capabilities of the method.

scholarly journals Estimation of Specific Cutting Energy in an S235 Alloy for Multi-Directional Ultrasonic Vibration-Assisted Machining Using the Finite Element Method

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 567 ◽  
Author(s):  
Luis C. Flórez García ◽  
Hernán A. González Rojas ◽  
Antonio J. Sánchez Egea
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Carbon Steel ◽  
Cutting Parameters ◽  
Machining Process ◽  
Specific Cutting Energy ◽  
The Finite Element Method ◽  
Turning Process ◽  
Cutting Energy ◽  
Element Method

The objective of this work is to analyze the influence of the vibration-assisted turning process on the machinability of S235 carbon steel. During the experiments using this vibrational machining process, the vibrational amplitude and frequency of the cutting tool were adjusted to drive the tool tip in an elliptical or linear motion in the feed direction. Furthermore, a finite element analysis was deployed to investigate the mechanical response for different vibration-assisted cutting conditions. The results show how the specific cutting energy and the material’s machinability behave when using different operational cutting parameters, such as vibration frequency and tool tip motion in the x-axis, y-axis, and elliptical (x-y plane) motion. Then, the specific cutting energy and material’s machinability are compared with a conventional turning process, which helps to validate the finite element method (FEM) for the vibration-assisted process. As a result of the operating parameters used, the vibration-assisted machining process leads to a machinability improvement of up to 18% in S235 carbon steel. In particular, higher vibration frequencies were shown to increase the material’s machinability due to the specific cutting energy decrease. Therefore, the finite element method can be used to predict the vibration-assisted cutting and the specific cutting energy, based on predefined cutting parameters.

Study on Mechanical Mechanism of ARB Process Based on Randomness

2011 ◽  
Vol 314-316 ◽  
pp. 609-613
Author(s):  
Guo Zhi Zhang ◽  
Jun Jing Fu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Process Control ◽  
Rolling Force ◽  
Theoretical Models ◽  
Element Model ◽  
The Finite Element Method ◽  
Force Variation ◽  
Plastic Theory ◽  
Element Method

The process control mechanism of ARB(accumulative roll bonding) process was studied. Based on micro-plastic theory, the principal stress method of macro-plastic theory and probability theory, theoretical models of rolling force and its standard deviation calculation were established. Moreover, shear deformation was analyzed with the finite element method and the finite element model established was verified through comparing with the experiment. Furthermore, through calculating the rolling force of ARB process of the typical parameters, roll force variation of every cycle was obtained and the theoretical model was verified through comparing with the results of the finite element method. The study in the paper provides analysis method and theory foundation for process control and manufacturing of ARB process.

Determination of sensor location for cutting tool deflection using finite element method simulation

2011 ◽  
Vol 226 (9) ◽  
pp. 2373-2377 ◽  
Author(s):  
Jaharah A Ghani ◽  
Poh Siang Jye ◽  
Che Hassan Che Haron ◽  
Muhammad Rizal ◽  
Mohd Zaki Nuawi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Cutting Force ◽  
Cutting Tool ◽  
Finite Element Method Simulation ◽  
Strain Gauges ◽  
Tool Deflection ◽  
Turning Process ◽  
Cutting Point ◽  
Element Method

The aim of this study was to determine the the optimum locations to mount the sensor for measuring the cutting tool deflection during turning process using finite element method simulation. In this study, stress analysis had been conducted using Autodesk Inventor Professional 2010 integrated with ANSYS software. The simulation results were validated using a strain gauge as the sensor for the detection of cutting force signal during the turning of hardened plain carbon steel JIS S45C using carbide tool. Two strain gauges were mounted on the tool holder at two defined locations I and II, at distances of 37 and 47 mm, respectively, from the cutting point. Only one set of cutting parameters was conducted at spindle speed, N = 1000 rpm, feed, f = 0.25 mm/rev and depth of cut, d = 0.80 mm. The turning process was stopped and the insert discarded when the average flank wear, VBm, reached 0.30 mm. The main cutting force, Fy, and the feed force, Fx, for each machining run were measured, collected and analysed at locations I and II. It was found that when strain gauges were placed at a distance of approximately 43 mm from the cutting point, it was the optimum location for sensing the cutting force signals.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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