?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Analisa+Nilai+Kekasaran+Permukaan+Paduan+Magnesium+AZ31+Yang+Dibubut+Menggunakan+Pahat+Potong+Berputar&rft.creator=Ahmad+Rama+Doni%2C+1015021019&rft.subject=Mesin+(General).+Mesin+Sipil+(General)&rft.description=Magnesium+merupakan+salah+satu+bahan+yang+banyak+digunakan+pada+komponen+otomotif+karena+memiliki+sifat+yang+ringan+dibandingkan+besi+cor+dan+baja+yang+relatif+berat.+Selain+itu+magnesium+memiliki+kelebihan+karakteristik+pemotongan+yang+sangat+baik+dan+menguntungkan.+Meskipun+demikian+magnesium+juga+dikenal+sebagai+bahan+logam+yang+mudah+terbakar+karena+mamiliki+titik+nyala+yang+rendah.+Sehingga+pada+proses+pemesinan+magnesium+cairan+pendingin+sangat+dibutuhkan+untuk+menurunkan+suhu+pemotongan%2C+namun+seiring+berkembangnya+zaman+penggunaan+cairan+pendingin+mulai+untuk+diminimalisir+karena+berakibat+pada+pencemaran+lingkungan.+Salah+satu+metode+penurunan+suhu+pemotongan+pada+proses+pemesinan+magnesium+adalah+dengan+menggunakan+pahat+potong+berputar.+Di+mana+pahat+akan+mengalami+pndinginan+selama+periode+putaran+tanpa+pemotongan.+Selain+aspek+suhu%2C+nilai+kekasaran+permukaan+juga+harus+diperhatikan.+Sebab+nilai+kekasaran+permukaan+adalah+salah+satu+karakteristik+kualitas+kritis+yang+penting+pada+proses+pemesinan.+Hasil+pengujian+nilai+kekasaran+material+magnesium+AZ31+pada+parameter+kecepatan+benda+kerja+(Vw)+25%2C50%2C120%2C160%2C200+m%2Fmin%2C+kecepatan+potong+pahat+putar+(Vt)+25%2C50%2C75+m%2Fmin%2C+gerak+makan+(f)+0%2C05+dan+0%2C1+mm%2Frev%2C+serta+kedalaman+potong+0%2C2+mm+menggunakan+insert+(pahat)+berdiameter+16+dan+20+mm+dengan+pengukuran+nilai+kekasaran+menggunkan+surface+tester+didapat+nilaikekasaran+minimum+0%2C62+%C2%B5m+pada+penggunaan+insert+16+mm+dan+nilai+kekasaran+maksimum+2%2C86+%C2%B5m+pada+penggunaan+insert+20+mm.+Hal+tersebut+menunjukkan+bahwa+semakin+besar+diameter+insert+yang+digunakan+pada+penelitian+ini+maka+nilai+kekasaran+yang+dihasilkan+akan+semakin+tinggi.+Hasil+lain++juga+menunjukkan+pengaruh+dari+setiap+variasi+parameter+yang+digunakan.+Semakin+tinggi+gerak+makan+maka+nilai+kekasaran+akan+semakin+tinggi%2C+semakin+tinggi+kecepatan+potong+pahat+putar+maka+nilai+kekasaran+akan+semakin+rendah%2C+pada+penggunaan+insert+16+mm+semakin+tinggi+kecepata+putar+benda+kerja+maka+nilai+kekasaran+yang+dihasilkan+akan+semakin+rendah+namun+pada+penggunaan+insert+20+mm+justru+didapat+hasil+yang+sebaliknya.%0D%0AKata+Kunci+%3A+Magnesium+AZ31%2C+pahat+potong+berputar%2C+nilai+kekasaran%2C+surface+tester.%0D%0A%0D%0AMagnesium+is+one+of+the+materials+which+are+widely+used+in+automotive+component+because+it+is+lighter+than+cast+iron+and+steel.+How+ever%2C+magnesium+has+the+excellences+of+good+and+profitable+cutting+characteristics.+Nevertheless%2C+magnesium+is+also+known+as+a+combustible+metal+since+it+has+a+low+flash+point.+Thus%2C+in+the+magnesium+machining+process%2C+cooling+fluid+is+very+needed+to+lower+cutting+temperature%2C+but+over+the+times%2C+the+use+of+cooling+fluid+has+been+minimized+due+to+the+environmental+pollution.+One+of+the+lowering+methods+in+magnesium+machining+process+is+by+using+lathe+in+which+the+tool+will+be+cooling+during+rotating+period+without+drilling.+Besides+the+aspect+of+temperature%2C+surface+roughness+value+must+also+be+considered.+It+is+because+the+surface+roughness+value+is+one+of+the+important+critical+quality+characteristics+in+the+machining+process.+The+testing+results+of+the+material+roughness+values+of+magnesium+AZ31+are%3A+work+piece+speed+parameter+(Vw)+25%2C50%2C120%2C160%2C200+m%2Fmin%2C+cutting+speed+(Vt)+25%2C50%2C75+m%2Fmin%2C+motion+meal+(f)+0.05+and+0.1+mm%2Frev%2C+and+the+depth+of+cut+0.2+mm+by+using+insert+(chisel)+of+16+and+20+mm+in+diameter+with+the+measurement+of+roughness+value+by+using+a+surface+tester+obtained+the+minimum+roughness+value+of+0.62+%C2%B5m+in+the+use+of+insert+16+mm+and+maximum+roughness+value+of+2%2C+86+%C2%B5m+in+the+use+of+insert+20+mm.+Those+show+that+the+larger+the+diameter+of+the+insert+used+in+this+research%2C+the+higher+the+roughness+value+produced.+The+other+result+also+shows+the+influence+of+every+parameter+variation+which+is+used.+The+higher+the+motion+meal%2C+the+higher+the+value+of+roughness%2C+the+higher+the+cutting+speed+of+lathe%2C+the+lower+the+value+of+the+roughness.+In+the+use+of+insert+16+mm%2C+the+higher+the+rotational+speed+of+the+work+piece%2C+the+lower+the+value+of+the+roughness+produced%2C+but+in+the+use+of+insert+20+mm%2C+it+is+obtained+the+opposite+result.%0D%0AKeywords+%3A+Magnesium+AZ31%2C+lathe%2C+roughness+value%2C+surface+tester%0D%0A&rft.publisher=Fakultas+Teknik&rft.date=2015-10-19&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F1%2F1.%2520ABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F2%2F2.%2520ABSTRACT.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F3%2F3.%2520COVER%2520DALAM.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F4%2F4.%2520LEMBAR%2520PERSETUJUAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F5%2F5.%2520LEMBAR%2520PENGESAHAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F6%2F6.%2520LEMBAR%2520PERNYATAAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F7%2F7.%2520RIWAYATHIDUP.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F8%2F8.%2520MOTTO.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F9%2F9.%2520PERSEMBAHAN.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F10%2F10.%2520SANWACANA.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F11%2F11.DAFTAR%2520ISI.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F12%2F12.DAFTAR%2520GAMBAR.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F13%2F13.DAFTAR%2520TABEL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F14%2FBAB%2520I.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F15%2FBAB%2520II.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F16%2FBAB%2520III.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F17%2FBAB%2520IV.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F18%2FBAB%2520V.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F19%2FDAFTAR%2520PUSTAKA.pdf&rft.identifier=++Ahmad+Rama+Doni%2C+1015021019++(2015)+Analisa+Nilai+Kekasaran+Permukaan+Paduan+Magnesium+AZ31+Yang+Dibubut+Menggunakan+Pahat+Potong+Berputar.++Fakultas+Teknik%2C+Universitas+Lampung.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F14186%2F