Finite element modelling and machining using WEDM

2nd International conference on Advances in Mechanical Engineering

Senkathir, S.^1 ; Sai Sandeep, K.^1

Department of Mechanical Engineering, SRM Institute of Science and Technology, kattankulathur, Tamil-Nadu, India^1

关键词: Finite element modelling;    L9 orthogonal arrays;    Machining equipments;    Machining Process;    Material removal rate;    Molybdenum wire;    Production fields;    Surface finishes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/402/1/012076/pdf
DOI  :  10.1088/1757-899X/402/1/012076

来源: IOP

【 摘 要 】

During the past few decades, due to the demands from the production fields producing really different and compact products, there developed a need to produce materials with proper finish and with proper Material Removal Rate(MRR). So, to know the surface finish(SR) and Material Removal Rate (MRR) of a material. There are some factors effecting these both factors. In this paper we are considering WEDM (Wire Electronic Discharge Machining) as the machining equipment, WEDM is a non-conventional traditional process in which the material is being cut using a electrically charged wire which is fed continusely on to the material and by continues spread of di-electric fluid for flushing out the removed material. In the removal process there are several parameters which have to be understood in getting perfect SR and MRR. There are some fixed parameters like SEN, Material, Wire, Di-electric fluid these are the fixed parameters which can't be changed, and the parameters which can be changed are Feed rate, Pulse-on, Pulse-off and Gap Voltage. In this paper to they performed 9-different experiments using L9 orthogonal array approach, which helps in selecting the optimized values. It's a trail and error process, among those 9 experiments we will get one best optimized way, and we will choose those particular parameters and values chosen as the optimized values for that materialin this paper we are selecting Inconel 718 material as the work piece and molybdenum wire as the feed wire in WEDM. In the study, during machining process time taken each experiment and the weight being reduced after every experiment is being noted down, in the calculation of MRR we need this terms(weight & time), the MRR can be calculated by (Weight of the work piece before machining-Weight of the work piece after machining/Time taken). After calculating MRR and SR manually we are going to compare this values with the mathematical FEA process by using MATlab or ANSYS. In this study we came to know that Duty factor which refers to pulse-on & off time plays an important role in MRR and feed rate plays an important role in SR.