Sains Malaysiana 43(1)(2014): 111–116

 

Effect of High-speed Parameters on Uncoated Carbide Tool in

Finish Turning Titanium Ti-6Al-4V ELI

(Kesan Parameter Berkelajuan Tinggi terhadap Mata Alat Berkabida tak Bersalut bagi Larikan Titanium Ti-6Al-4V ELI)

 

M.A. SULAIMAN², C.H. CHE HARON¹*, J.A. GHANI¹& M.S. KASIM²

¹Department of Mechanical and Material EngineeringFaculty of Engineering and Built Environment

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia

 

²Department of Process, Faculty of Manufacturing Engineering, Universiti Teknikal Malaysia Melaka

76100 Hang Tuah Jaya, Melaka

 

Received: 21 March 2012/Accepted: 15 May 2012

 

ABSTRACT

In this work, the Sandvik uncoated carbide insert, CNGG 120408-SGF-H13A was used as a cutting tool in high-speed turning of titanium alloy Ti-6Al-4V ELI (extra-low interstitial) with hardness of 32 HRC. Wear is one of the problems that cannot be avoided in machining process. Therefore, the objective of this paper was to investigate tool-wear behavior of various cutting-speed values (high-speed range) on the tool life of the cutting tools, especially in finishing titanium alloy. The experiments were performed under flooded coolant condition using water-based mineral-oil. The cutting speeds employed were 120, 170 and 220 m/min. The feed rate was constant at 0.2 mm/rev and the depth of cut was 0.4 mm. Based on the results, the highest cutting speed of 220 m/min caused the highest wear rate. By linking the machine operations and the tool life curves obtained using flank wear data, the wear behavior of uncoated carbide was described.

 

Keywords: Coolant; high speed turning; Ti-6Al-4V ELI; uncoated carbide

 

ABSTRAK

Dalam kajian ini, mata pemotong karbida tidak bersalut buatan Sandvik; CNGG 120408-SGF-H13A telah digunakan sebagai alat pemotongan dalam larikan kelajuan tinggi terhadap titanium aloi Ti-6Al-4V ELI (tambahan rendah celahan) yang mempunyai kekerasan 32 HRC. Kehausan mata pemotong adalah salah satu masalah yang tidak dapat dielakkan dalam proses melarik. Oleh itu, objektif kajian ini adalah untuk melihat kelakuan kehausan mata pemotong pada pelbagai nilai kelajuan pemotongan (pada julat kelajuan tinggi) terhadap jangka hayat mata pemotong terutama untuk proses larikan akhiran titanium aloi. Eksperimen ini telah dilakukan di bawah keadaan penyejuk banjir dengan menggunakan minyak mineral berasaskan air. Kelajuan pemotongan adalah 120, 170 dan 220 m/min. Sementara itu, kadar suapan adalah malar pada kadar 0.2 mm/pusingan dan kedalaman pemotongan pada 0.4 mm. Berdasarkan keputusan yang diperoleh, didapati bahawa kelajuan pemotongan tertinggi, 220 m/min mengakibatkan kadar kehausan yang tertinggi pada mata pemotong. Dengan menghubungkan operasi pemesinan dan keluk hayat mata pemotong yang diperoleh dengan menggunakan data haus rusuk, kelakuan haus karbida tidak bersalut telah diterangkan.

 

Kata kunci: Karbida tidak bersadur; larikan berkelajuan tinggi; pelinciran; Ti-6Al-4V ELI

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*Corresponding author; email: chase@eng.ukm.my