Modeling of kerf width and surface roughness in wire cut electric discharge machining of Ti-6Al-4V

Abstract

Surface roughness and kerf width are the two challenging quality characteristics in wire cut electric discharge machining (WEDM) of Ti-6Al-4V to improve accuracy in machining. In this study, effect of wire displacement on the kerf width and surface roughness is studied in WEDM of Ti-6Al-4V. Mechanistic models are developed for kerf width and surface roughness using amplitude and frequency of wire vibration in X and Y directions. Amplitude and frequency of wire displacement in X and Y directions are directly measured using an accelerometer at different working conditions. The estimated kerf width and surface roughness are compared with the experimental results and the average error between them is found to be 3.7 and 4.2% respectively. The results showed that the current and wire tension have significant effect on the wire displacement. The kerf width and surface roughness are effected more by the applied current and the metal removal rate is effected by current and pulse on time. A working condition with 3.3 A of current, 15 N of wire tension, 14.4 µs of pulse on time and 41.5 µs of pulse off time is found to be an optimum working condition.

Keywords

WEDM kerf width surface roughness wire tension wire displacement

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References

Murthy

Sreenivasa Rao

VenkataRao

Experimental and 3D FEM-ANN based analysis and prediction of cutting forces, tool vibration and tool wear in boring of TI-6AL-4V alloy. Int J Aut Mech Eng 2019; 16: 6146–6160.

Chaudhary

Siddiquee

Chanda

AK.

Effect of wire tension on different output responses during wire electric discharge machining on AISI 304 stainless steel. Def Tech 2019; 15: 541–544.

Bai

Fan

, et al. Study of wire tension control system based on closed loop PID control in HS-WEDM. Int J Adv Manuf Technol 2016; 82: 1089–1097.

Abbasi

Jahanzaib

Azam

, et al. Effects of wire-Cut EDM process parameters on surface roughness of HSLA steel. Int J Adv Manuf Technol 2017; 91: 1867–1878.

Chen

Zhang

Hang

, et al. Investigation on a novel surface microstructure wire electrode for improving machining efficiency and surface quality in WEDM. Int J Adv Manuf Technol 2019; 102: 2409–2421.

Zhang

Chen

Zhang

, et al. A macroscopic mechanical model of wire electrode deflection considering temperature increment in MS-WEDM process. Int J Mach Tools Manuf 2014; 78: 41–53.

Venkatarao

Anup Kumar

An experimental parametric analysis on performance characteristics in wire EDM of Inconel 718. Proc I Mech E Part C: J Mech Eng Sci 2019; 233: 4836–4849.

Habib

Okada

Study on the movement of wire electrode during fine wire electrical discharge machining process. J Mater Process Technol 2016; 227: 147–152.

Chen

Zhang

Yan

A high-precision constant wire tension control system for improving workpiece surface quality and geometric accuracy in WEDM. Prec Eng 2018; 54: 51–59.

10.

Puri

Bhattacharyya

An analysis and optimisation of the geometrical inaccuracy due to wire lag phenomenon in wedm. Int J Mach Tool Manuf 2003; 43: 151–159.

11.

Abyar

Abdullah

Akbarzadeh

Analyzing wire deflection errors of WEDM process on small arced corners. J Manuf Proc 2018; 36: 216–223.

12.

Gong

Sun

Wen

, et al. Experimental study on accuracy and surface quality of TC2 in LS-WEDM multiple cuts. J Braz Soc Mech Sci Eng 2016; 38: 2421–2433.

13.

Okada

Konishi

Okamoto

, et al. Wire breakage and deflection caused by nozzle jet flushing in wire EDM. CIRP Ann Manuf Technol 2015; 64: 233–236.

14.

Sivanaga Malleswara Rao

Venkata Rao

Hemachandra Reddy

, et al. Prediction and optimization of process parameters in wire cut electric discharge machining for high-speed steel (HSS). Int J Comp Appl 2017; 39: 140–147.

15.

Banh

T-L

Nguyen

H-P

Ngo

, et al. Characteristics optimization of powder mixed electric discharge machining using titanium powder for die steel materials. Proc I Mech E Part E: J Proc Mech Eng 2018; 232: 281–298.

16.

Rajyalakshmi

Venkata Ramaiah

Multiple process parameter optimization of wire electrical discharge machining on Inconel 825 using Taguchi grey relational analysis. Int J Adv Manuf Technol 2013; 69: 1249–1262.

17.

Shihab

SK.

Optimization of WEDM process parameters for machining of friction-stir-welded 5754 Aluminum alloy using Box–Behnken design of RSM. Arab J Sci Eng 2018; 43: 5017–5027.

18.

Kumar Bhushan

Multiresponse optimization of Al alloy-SiC composite machining parameters for minimum tool wear and maximum metal removal rate. ASME J Manuf Sci Eng 2013; 135/: 0210–0211. doi:10.1115/1.4023454.

19.

Zhang

Senthil Kumar

Rahman

, et al. Modeling of the effect of tool edge radius on surface generation in elliptical vibration cutting. Int J Adv Manuf Technol 2013; 65: 35–42.

20.

Shamoto

Moriwaki

Study on elliptical vibration cutting. CIRP Ann 1994; 43: 35–38.

21.

Venkata Rao

Murthy

Vidhu

KP.

Assignment of weightage to machining characteristics to improve overall performance of machining using GTMA and utility concept. CIRP J Manuf Sci Technol 2017; 18: 152–158.

22.

Kumar

Investigation of machining characterization for wire wear ratio & MRR on pure titanium in WEDM process through response surface methodology. Proc I Mech E Part E: J Proc Mech Eng 2018; 232: 108–126.