Machining characteristics of titanium alloy (Ti–6Al–4V) using a combination process of EDM with USM

Lin, Yan Cherng; Yan, Biing Hwa; Chang, Yin‐Cheng

doi:10.1016/s0924-0136(00)00539-2

Cited by 230 publications

(113 citation statements)

References 13 publications

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“…However, the depth to diameter ratio is limited to about 3:1 (Kobls, 1984). The disadvantages of USM are lower material removal rate (MRR) compared with other processes and serious tool wear that usually affects machining precision (Lin et al, 2000). Unlike twist drilling, only very small debris was produced during the USM process.…”

Section: Description and Features Of Usmmentioning

confidence: 99%

Mechanical Drilling Processes for Titanium Alloys: A Literature Review

Zhang

Churi

Pei

et al. 2008

Machining Science and Technology

119

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Titanium and its alloys (Ti) are attractive for many applications due to their superior properties.However, they are regarded as hard-to-machine materials. Drilling is an important machining process since it is involved in nearly all Ti applications. It is desirable to develop cost-effective drilling processes for Ti and/or improve the cost-effectiveness of currently-available processes. Such development and improvement will be benefited by a comprehensive literature review of drilling processes for Ti. This paper presents a literature review on mechanical drilling processes for Ti, namely, twist drilling, vibration assisted twist drilling, ultrasonic machining, and rotary ultrasonic machining. It discusses cutting force, cutting temperature, tool wear and tool life, hole quality (diameter and cylindricity, surface roughness, and burr), and chip type when drilling of Ti using these processes.

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Section: Description and Features Of Usmmentioning

confidence: 99%

Mechanical Drilling Processes for Titanium Alloys: A Literature Review

Zhang

Churi

Pei

et al. 2008

Machining Science and Technology

119

View full text Add to dashboard Cite

show abstract

“…Ti-6Al-4V alloy has exceptional merits such as high strength-weight ratio, good temperature stability and prominent corrosion resistance, which makes it widely used in aerospace, automobile, chemical and biomedical fields [1,2]. However, it is a hard-to-cut material with its high melting and low thermal conductivity and it not suitable for traditional machining.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on green electrical discharge machining in tap water of Ti–6Al–4V and parameters optimization

Tang

2013

Int J Adv Manuf Technol

101

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Ti-6Al-4V is widely used in the aerospace, automobile, and biomedical fields, but is a difficult-to-machine material. Electrical discharge machining (EDM) is regarded as one of the most effective approaches to machining Ti-6Al-4V alloy, since it is a non-contact electro-thermal machining method, and it is independent from the mechanical properties of the processed material. This paper aims to combine grey relational analysis and Taguchi methods to solve the problem of EDM parameters optimization. From the viewpoint of health and environment, tap water as working fluid has good working environment, since it does not release harmful gas. The process parameters include discharge current, gap voltage, lifting height, negative polarity and pulse duty factor. The electrode wear ratio (EWR), material removal rate (MRR) and surface roughness (SR) as objective parameters are chosen to evaluate the whole machining effects. Experiments were carried out based on Taguchi L 9 orthogonal array and grey relational analysis, and then verified the results through a confirmation experiment. Compared the machining parameters A 1 B 1 C 3 D 2 with A 1 B 2 C 2 D 2 , MRR increased from 1.28 mm 3 /min to 2.38 mm 3 /min, EWR decreased from 0.14 to 0.10 mm 3 /min and SR decreased from Ra 2.37 μm to Ra 1.93 μm. The process parameters sequenced in order of relative importance are: the ratio of pulse width to pulse interval, discharge current, lifting height and gap voltage. The results showed that using tap water machining Ti-6Al-4V material can obtain high MRR, decrease the machining cost and have no harmful to the operators and the environment.

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“…The alloy was solution-treated and aged by annealing at 790°C for 30 5 minutes followed by air cooling, resulting in a β-phase state [9]. The Ti alloy was manufactured at the GfE-Metalle und Materialien GmbH in Nuremberg, Germany, as were all the other alloys described in case studies below.…”

Section: Work-piece Materialsmentioning

confidence: 99%

“…This is a reason for a spate of research in hybrid approaches to machining, whereby two or more complementary cutting techniques or mechanisms are used simultaneously to achieve greater productivity or enhance product quality. Examples of such approaches are a combination of laser-assisted machining (LAM) and cryogenic cooling of the tool [3]; electrical discharge machining (EDM) in milling of Ti alloys [4] and combination of EDM with ultrasonic machining [5], to name a few. One promising hybrid machining technique, which is the subject of this chapter, is ultrasonically assisted machining (UAM) and its variants.…”

Section: Introductionmentioning

confidence: 99%