7075, 6061 Ve 2024 Alüminyum Alaşımlarının Tornalanmasında 00V. Yüzey Pürüzlülugü ve Takım Aşınmasının Karşılaştırılması

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International Journal of Engineering Research and Development

ŝůƚͬsŽůƵŵĞ͗ϵ^ĂLJŦͬ/ƐƐƵĞ͗Ϯ Haziran/June ϮϬϭϳ ŚƚƚƉƐ͗ͬͬĚŽŝ͘ŽƌŐͬϭϬ͘ϮϵϭϯϳͬƵŵĂŐĚ͘ϯϱϭϳϰϲ

* mpul@kku.edu.tr

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Comparison of Surface Roughness and Tool Wear in Turning of 7075, 6061 and 2024 Aluminum Alloys

Muharrem PUL

.ÕUÕNNDOH Üniversitesi, .ÕUÕNNDOH0HVOHN<NVHNRNXOX, 71450 KIRIKKALE

%DúYXUXReceived: 17/03/2017 Kabul/Accepted: 21/05/2017 Son Versiyon/Final Version: 15/06/2017

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Abstract

Aluminium and its alloys having properties such as lightness, strength and easy formability has ever increasing usage area in industry.

Importance and usage areas of 7075, 6061 and 2024 quality Al alloy in defense and aviation industry increases rapidly Determination of optimum values in surface roughness and cutting tools wear behaviours in machining of 7075, 6061 and 2024 aluminum alloy is aimed in this study. For this purpose, machining tests on 7075, 6061 and 2024 aluminum alloy was performed to CNC lathe. These tests were performed by choosing constant cutting depths (2.5 mm), four different cutting speeds (200, 250, 325, 400 m/min) and three different feed rate values (0.250-0.325-0.400 mm/rev). Carbide cutting tools suitable for machining aluminum was used in tests.

In tests, roughness values of machined surfaces were measured and wear behaviours of cutting tools were examined. The test results were compared among the three different aluminum alloys. Finally, comparison will be made by interpreting values that are obtained according to different machining parameters and optimum machining parameters were determined. Large increase in surface

roughness corresponds to the slight increase in feed rate has occurred. Appreciable wear mechanisms were not happened in cutting tools.

Key Words

“Aluminum Alloy, Turning, Feed Rate, Cutting Speed, Surface Roughness, Tool Wear”

66 1. *ø5øù

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67

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% Fe % Si % Cu % Mn % Mg % Zn % Ti % Cr

0,50 0,40 0,20 0,30 2,10-2,90 5,10-6,10 0,20 0,18-0,35

Akma (Mpa) Çekme (Mpa) Uzama (%) Sertlik (Brinel)

460 -505 530 -570 6-8 145 -155

Al 6061

% Fe % Si % Cu % Mn % Mg % Zn % Ti % Cr

0,70 0,40-0,80 0,60-1,10 0,15 0,80-1,20 0,25 0,15 0,04-035

Akma (Mpa) Çekme (Mpa) Uzama (%) Sertlik (Brinel)

240 -275 260 -310 8 -12 90 -95

Al 2024

% Fe % Si % Cu % Mn % Mg % Zn % Ti % Cr

0,70 0,50 0,05-0,20 0,30-0,90 1,20-1,80 0,25 0,15 0,10

Akma (Mpa) Çekme (Mpa) Uzama (%) Sertlik (Brinel)

315 -330 440 -465 12-14 120

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0,315 mm/rev øOHUOHPH

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325 D7 D8 D9 3

400 D10 D11 D12 4

Al 6061

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325 325 D19 D20 D21

400 400 D22 D23 D24

Al 2024

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200 200 D25 D26 D27

250 250 D28 D29 D30

325 325 D31 D32 D33

400 400 D34 D35 D36

68

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69 3. BULGULAR

3.1. Yüzey Pürüzlülükleri

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Al 7075

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200 D1 2,48 D2 3,68 D3 5,80

250 D4 2,53 D5 3,61 D6 5,93

325 D7 2,35 D8 3,57 D9 6,19

400 D10 2,38 D11 3,49 D12 5,34

Al 6061

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200 D13 2,34 D14 3,76 D15 5,84

250 D16 2,53 D17 3,60 D18 5,70

325 D19 2,30 D20 3,86 D21 6,49

400 D22 2,42 D23 3,59 D24 5,95

Al 2024

øOHUOHPHPPUHY øOHUOHPHPPUHY øOHUOHPHPPUHY .HVPHKÕ]ÕPPLQ <]H\3U]OON'H÷HUOHUL5DPm)

200 D25 2,48 D26 3,80 D27 5,92

250 D28 2,57 D29 3,73 D30 5,66

325 D31 2,54 D32 3,66 D33 6,04

400 D34 2,56 D35 3,62 D36 5,96

(a)

70

(b)

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75 6. KAYNAKLAR

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'H÷HUOHQGLULOPHVLøoLQ.XUDOODUYHøúOHPOHU´76($QNDUD

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ùHNHU8³7DODúOÕøPDODWWD7DNÕP7DVDUÕPÕ´G.Ü. )HQ%LOLPOHUL(QVWLWV<NVHN/LVDQV'HUV1RWODUÕ, 39-45, Ankara.