Evaluation of drilled hole quality in Al 2024 alloy

Kurt, Mustafa; Kaynak, Yusuf; Bagci, Eyup

doi:10.1007/s00170-007-1049-1

Cited by 80 publications

(69 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is seen from Figure 2 that Ra values increase with increasing cutting speed. Increase in cutting speed is known as important parameter on increasing chatter effecting Ra values negatively in drilling operations [14]. Amplitude increase on torque is seen with increasing cutting speed by examining torque graphs obtained during drilling operations (Figure 3).…”

Section: Analysis Of Surface Roughness (Ra)mentioning

confidence: 99%

The effect of drilling parameters for surface roughness in drilling of AA7075 alloy

2017

View full text Add to dashboard Cite

Abstract. AA7075 aluminum alloy has been very popular significantly interest in the production of structural components in automotive and aviation applications due to its high strength, low density, good plasticity and better machinability comparable to many metals. Particularly, final products must have uniformly high quality to ensure essential safety standards in the aircraft industry. The optimization of hole quality which can variable according to tool geometry and drilling parameters is important in spite of high machinability rate of AA7075 alloy. In this study, the effects of drilling parameters on average surface roughness (Ra) has been investigated in drilling of AA7075 with tungsten carbide drills. Machining experiments were performed with three different drill point angles and three different levels of cutting parameters (feed rate, cutting speed). The effects of drilling parameters on thrust force has been determined with ANOVA in %95 confidence level. Feed rate was determined as the most important factor on Ra according to ANOVA results. Moreover, it was shown that increasing feed rate leads to increase of Ra while increasing drill point angle leads to decrease of Ra. The optimum surface roughness was obtained with point angle of 130°, cutting speed of 40 m/min and feed rate of 0.1 mm/rev, thereby the validity of optimization was confirmed with Taguchi method.

show abstract

Section: Analysis Of Surface Roughness (Ra)mentioning

confidence: 99%

The effect of drilling parameters for surface roughness in drilling of AA7075 alloy

2017

View full text Add to dashboard Cite

show abstract

“…It is thought that the increasing cutting and feed speeds caused the hole diameters to get bigger by increasing the vibrations. 24 It was decided that fewer deviations in the hole diameters are due to less vibration at lower feed rate and slower penetration into the pieces. During the cutting operation, bending and shape variations occur in the material at the feed direction due to its porous structure.…”

Section: Evaluation Of Hole Diametersmentioning

confidence: 99%

Effect of cutting parameters on the drilling of AlSi7 metallic foams

Uzun¹,

Gökmen²,

Çinici³

et al. 2017

Mater. Tehnol.

View full text Add to dashboard Cite

In this study, the behaviors of Al matrix metallic foams, produced by the powder-metallurgy method, against the hole-drilling operation were examined. The stirred Al, 7 % Si and 1 % TiH2 powders were pressed in a mould under uniaxial pressure (600 MPa) and then deformed, and in this way foamable block samples were obtained. The block samples were subjected to a foaming process at 710°C. The obtained samples were drilled at different cutting speeds (10, 30, 50, 70) mm/min and feed rates (0.15, 0.225, 0.30) mm/r with drill tips of different diameters (4, 5 and 6) mm. It was observed that the foam affected the chip breakings and chip adhesions increased in proportion to the cutting speed. In the deviation from circularity, the feed rate turned out to be a more effective parameter than the cutting speed. Keywords: foams, cutting, machining, tooling V {tudiji je bilo preiskovano obna{anje kovinskih pen na osnovi Al, izdelanih po metodi metalurgije prahov, pri vrtanju luknje. Me{anica Al, 7 % Si in 1 % TiH2 prahov je bila stisnjena v orodju z enoosnim tlakom (600 MPa) in potem deformirana, da so bili dobljeni vzorci sposobni za penjenje. Vzorci so bili izpostavljeni procesu penjenja pri temperaturi 710°C. Dobljeni vzorci so bili vrtani pri razli~nih hitrostih rezanja (10, 30, 50, 70) mm/min in hitrostih podajanja (0,15, 0,225, 0,30) mm/r, s svedri z razli~nimi premeri (4, 5, 6) mm. Ugotovljeno je, da pena vpliva na lomljenje ostru`kov, oprijemanje ostru`kov pa se pove~uje proporcionalno s hitrostjo rezanja. Pokazalo se je, da na odstopanja od kroga bolj vpliva hitrost podajanja kot pa hitrost rezanja.

show abstract

“…The optimal parametric combination of the three control variables for the minimum surface roughness was achieved at 7.62 m/min cutting speed, 0.1 mm/rev feed rate, and Minimal quantity lubricant (MQL) cutting environment Kurt et al [6] enhanced the surface finish and hole diameter correctness in the dry drilling of Al 2024 alloy. They notice that the feed rate , cutting speed , and differently coated drills affect surface finish by 35.46 %, 6.15%, and 53.84 % and the depth of drilling, feed rate , cutting speed and differently coated drills affect the hole roundness errors by 8.18%, 74.09%, 6.04%, and 0.10% for the dry drilling of Al 2024 alloy.…”

Section: Literature Reviewmentioning

confidence: 99%

The Process Parameters of Drilling Process:- A Review

Garg¹,

Singh²,

Bhushan³

2017

IJERMT

View full text Add to dashboard Cite

Abstract:rilling is a metal cutting machine process used to create hole of circular cross section by employing a drill bit. The circular cross section holes size varying in range of small to large.Several types of drill bits like H.S.S., carbide tool, TiN and TiAlN coated carbide and HSS twist drill etc. are used for drilling process in industries. The drilling operation is affected by various input parameters like cutting speed, feed rate, depth of cut, cutting fluid, drill diameter, point angle etc. The various experiments have been done on CNC drilling machine.There are various materials like steel, composite material (like C.F.R.P, ALalloy), and MMC being used for analysis of drilling operation.

show abstract

Evaluation of drilled hole quality in Al 2024 alloy

Cited by 80 publications

References 18 publications

The effect of drilling parameters for surface roughness in drilling of AA7075 alloy

The effect of drilling parameters for surface roughness in drilling of AA7075 alloy

Effect of cutting parameters on the drilling of AlSi7 metallic foams

The Process Parameters of Drilling Process:- A Review

Contact Info

Product

Resources

About