scholarly journals Simulation of Material Removal Process in EDM with Composite Tools

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Shengfang Zhang ◽  
Wenchao Zhang ◽  
Puyong Wang ◽  
Yu Liu ◽  
Fujian Ma ◽  
...  
Keyword(s):  
Material Removal ◽  
Electrical Discharge Machining ◽  
Single Pulse ◽  
Die Steel ◽  
Composite Tool ◽  
Discharge Parameters ◽  
Material Removal Model ◽  
Simulation Results ◽  
Removal Model ◽  
Single Material

With the development of (electrical discharge machining) EDM technology, composite tools with special features gradually replace the traditional single-material tools and have become widely used in specific processing conditions. In order to predict the wear of composite tool effectively, in this paper, a material removal model of single-pulse EDM with composite tools was established by using the finite element method. The surface temperature distribution of the composite tool was obtained by taking the copper-die steel tool as the analysis object. And the shape of discharge crater as well as the removal volume was obtained by the element birth and death method. The influences of discharge parameters and tool materials on the removal volume were analyzed respectively. The EDM experiments were carried out by using copper-die steel as the composite tool to verify the simulation results. It shows that the errors between actual machining results and the simulation results are less than 10%, which proves the accuracy of the simulation model.

scholarly journals Research on Shape Change of Multimaterial Electrode for EDM

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Wenjian Wang ◽  
Yu Liu ◽  
Wenchao Zhang ◽  
Fujian Ma ◽  
Dapeng Yang ◽  
...  
Keyword(s):  
Material Removal ◽  
Shape Change ◽  
Pulse Discharge ◽  
Single Pulse ◽  
Machining Process ◽  
Die Steel ◽  
Electrode Shape ◽  
Simulation Strategy ◽  
Feed Strategy ◽  
Simulation Results

The shape change law of a multimaterial electrode in EDM was studied, and a cosimulation between ANSYS and MATLAB of electrode shape change of the multimaterial electrode and workpiece was established. Element birth and death in ANSYS was used to obtain the removal volume in a single-pulse discharge, and the electrode feed strategy, material removal, and renewal strategy are considered to establish the shape simulation strategy. Then, a program based on MATLAB software was compiled to simulate the machining process and predict the shape change of the multimaterial electrode of different combinations. The experiments of different multimaterial electrodes were carried out with the die steel as the workpiece. The simulation results were compared with the experimental results to verify the effectiveness of the simulation model.

A Mechanistic Model of Material Removal in Magnetorheological Finishing (MRF)

2007 ◽  
Vol 359-360 ◽  
pp. 384-388
Author(s):  
Feng Jun Chen ◽  
Shao Hui Yin ◽  
Jian Wu Yu ◽  
Hitoshi Ohmori ◽  
Wei Min Lin ◽  
...  
Keyword(s):  
Material Removal Rate ◽  
Material Removal ◽  
Reynolds Equation ◽  
Removal Rate ◽  
Mechanistic Model ◽  
Magnetorheological Fluid ◽  
Magnetorheological Finishing ◽  
Material Removal Model ◽  
Removal Model ◽  
The Magnetic Field

According to the sharp rheological characteristics of magnetorheological fluid in the magnetic field, the principle and mechanism of magnetorheological finishing is analyzed. Based on the Preston equation, the Reynolds equation and its boundary conditions, the two-dimensional material removal model is built and simulated. Furthermore, a series of MRF experiments are carried out, and the influence of the immersed depth and material kinds on material removal rate are clarified respectively. The experimental results are compared with the modeling results of material removal rate to confirm the mechanistic model validity.

Development of a New Plate Polishing Technique with an Instantaneous Tiny-Grinding Wheel Cluster Based on Magnetorheological Effect

2008 ◽  
Vol 53-54 ◽  
pp. 155-160 ◽  
Author(s):  
Qiu Sheng Yan ◽  
Ai Jun Tang ◽  
Jia Bin Lu ◽  
Wei Qiang Gao
Keyword(s):  
Surface Roughness ◽  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Grinding Wheel ◽  
Abrasive Particles ◽  
Magnetorheological Effect ◽  
Material Removal Model ◽  
Mr Effect ◽  
Removal Model

A new plate polishing technique with an instantaneous tiny-grinding wheel cluster based on the magnetorheological (MR) effect is presented in this paper, and some experiments were conducted to prove its effectiveness and applicability. Under certain experimental condition, the material removal rate was improved by a factor of 20.84% as compared with the conventional polishing methods with dissociative abrasive particles, while the surface roughness of the workpiece was not obviously increased. Furthermore, the composite of the MR fluid was optimized to obtain the best polishing performance. On the basis of the experimental results, the material removal model of the new plate polishing technique was presented.

The Research and Development on the Material Removal Mechanism of the Ultrasonic Cutting

2014 ◽  
Vol 1027 ◽  
pp. 40-43
Author(s):  
Yan Yan Lou ◽  
Yan Zhang ◽  
Ying Gao ◽  
Jia Chen Zhang ◽  
Yan Zhou Sun
Keyword(s):  
Material Removal ◽  
Development Trend ◽  
Ultrasonic Machining ◽  
Removal Mechanism ◽  
Rotary Ultrasonic Machining ◽  
Material Removal Mechanism ◽  
Material Removal Model ◽  
The Development Trend ◽  
Removal Model ◽  
Ultrasonic Cutting

Ultrasonic machining is an important part of modern processing technology which is adapt to all kinds of hard brittle materials processing. This paper reviews the latest progress of the material removal mechanism on one-dimensional ultrasonic machining, two-dimensional ultrasonic machining and rotary ultrasonic machining, and expounds the development trend of establishing the material removal model of the ultrasonic machining.

A Material Removal Model for Nonconstant-contact Flexible Grinding

2021 ◽  
Author(s):  
Huan Ye ◽  
Zhitong Chen ◽  
Zhuoqun Xie ◽  
Shangbin Li ◽  
Shuai Su
Keyword(s):  
Material Removal ◽  
Model Parameters ◽  
Grinding Process ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Material Removal Model ◽  
Contact Situation ◽  
Equivalent Method ◽  
Removal Model ◽  
Novel Model

Abstract Contact calculation is of great importance in predicting the material removal (MR) of flexible grinding process (FGP). The contact is mostly considered approximately constant in the existing MR models, while the situations that contact varies a lot after FGP are ignored. Therefore, a novel model is proposed in this paper to take those situations into consideration. Firstly, the nonconstant-contact situation is introduced. Then an equivalent method is developed to convert the nonconstant-contact grinding process into the accumulation of several quasi-constant-contact grinding processes. Based on the equivalent method, a MR model is established, and the procedure to obtain the model parameters by the finite element analysis (FEA) is introduced. In the end, the equivalent method and the MR model are tested by a series experiments of different process parameters. Results show that the proposed MR model can predict the material removal effectively for the nonconstant-contact situations.

Modeling of Material Removal in Atomized Dielectric-Based Electrical Discharge Machining (EDM)

2019 ◽  
Author(s):  
Asif Tanveer ◽  
Shiv G. Kapoor ◽  
Soham S. Mujumdar
Keyword(s):  
Electrical Discharge ◽  
Material Removal ◽  
Film Flow ◽  
Electrical Discharge Machining ◽  
Dielectric Film ◽  
Machining Process ◽  
Spray Parameters ◽  
Melt Pool ◽  
Material Removal Model ◽  
Pool Formation

Abstract Atomized dielectric-based electrical discharge machining (EDM) is an emerging technology in which the dielectric between the electrodes is supplied in the form of a thin film using a spray atomizer. This novel machining process uses significantly less quantities of dielectric compared to the conventional EDM while resulting in higher material removal rates and better debris flushing. This paper presents a model-based investigation of the atomized dielectric-based EDM to study the effect of the dielectric film flow on material removal. A melt-pool formation and material removal model is developed to predict the material removal in terms of crater shapes during a single EDM discharge. The atomization spray parameters are varied in order to produce different dielectric film velocities. The model accurately captures the asymmetry in crater shapes caused by the dielectric film flow and predicts the crater diameter and depth, however, the model overestimates the crater sizes observed in experiments.

CHEMICAL MECHANICAL POLISHING AND ITS MECHANISM ON YTTERBIUM-DOPED MIXED SESQUIOXIDES (Yb:LuScO3)

2020 ◽  
pp. 2050036
Author(s):  
YUANYUAN FANG ◽  
HONGBO HE ◽  
LUNZHE WU ◽  
ZHE WANG ◽  
AIHUAN DUN ◽  
...  
Keyword(s):  
Chemical Mechanical Polishing ◽  
Material Removal ◽  
Mechanical Polishing ◽  
Scanning Probe ◽  
Basic Material ◽  
Atomic Step ◽  
Removal Mechanism ◽  
Material Removal Mechanism ◽  
Material Removal Model ◽  
Removal Model

In this paper, Yb:LuScO3 crystal was processed by chemical mechanical polishing (CMP), and the surface roughness of 0.18[Formula: see text]nm was obtained. The atomic step structures of these sesquioxide crystals are successfully characterized by AFM scanning probe technology. Through several CMP experiments, the basic material removal mechanism of a ytterbium-doped LuScO3 crystal during CMP is studied. Based on the findings, a material removal model is established. The results of this study provide ideas for the study of CMP, crystal growth and epitaxy.

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