ANALISA PENGARUH KECEPATAN FEEDING TERHADAP KEKASARAN PERMUKAAN DRAW BAR MESIN MILLING ACIERA DENGAN PROSES CNC TURNING
DOI:
https://doi.org/10.22441/jtm.v3i3.1022Abstract
Dalam industri manufaktur terdapat banyak yang menggunakan proses pemesinan seperti: mesin milling, mesin turning, mesin frais, dan lain-lain. Di dalam mesin milling merk Aciera terdapat part yang sering rusak yaitu Draw Bar yang berfungsi untuk memasang dan mengencangkan arbor pada kepala mesin. Pembuatan Draw Bar pada dasarnya dilakukan dengan proses turning CNC. Untuk mendapatkan Draw Bar sesuai produk yang aslinya, penulis mencoba melakukan penelitian untuk membuat Draw Bar dimulai dengan pemilihan material yang kekerasanya sama atau mendekati kekerasan Draw Bar aslinya dan proses pemesinan dengan melakukan variasi perubahan feed rate (kecepatan pemakanan) menggunakan mesin CNC turning type Tornado 100. Dari hasil analisis pengaruh feed rate terhadap kekasaran permukaan pada proses pembubutan Draw Bar meggunakan mesin CNC turning menunjukkan bahwa adanya pengaruh yang signifikan antara perubahan feed rate dengan hasil kekasaran permukaan Draw Bar dari hasil pengujian (eksperimen). Nilai hasil uji kekasaran yang di dapat adalah 1.91 µm dengan putaran spindle = 2400 RPM dan feeding 240 mm/menit. Dari hasil 21 uji coba kekasaran berarti semakin tinggi feed rate maka kekasaran permukaan Draw Bar yang dihasilkan akan semakin kasar. Hasil pengujian menggunakan surface roughness tester,pada bagian Draw Bar menunjukkan hasil permukaan pada part original nya adalah 1.90 µm.Downloads
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