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All Journal JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN INOVTEK POLBENG Jurnal Media Elektro : Journal of Electrical Power, Informatics, Telecommunication, Electronics, Computer and Control System Inovtek Seri Mesin Jurnal Polimesin

Razali Razali

Politeknik Negeri Bengkalis

Author-ID : 2429738

Aerospace Engineering Automotive Engineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Rancang Bangun dan Analisa Poros Mesin Roasting Kopi Dengan Prinsip Kerja Rotary Imam Sutadi; Razali Razali
INOVTEK - SERI MESIN Vol 2, No 2 (2022)
Publisher : Politeknik Negeri Bengkalis

Liberika coffee is coffee that is cultivated in the lowlands which only has a height of about two meters above sea level. Liberika coffee that lives in the lowlands of Rangsang Pesisir, Meranti Islands Regency, is one of the typical icons of Meranti, so as not to lose the taste of Liberika Meranti coffee. The author wants to design and build a coffee roasting machine to make it easier to determine Light, Medium, Dark roasts so that coffee quality is maintained and the price is more affordable for a coffee roasting machine. From the provisions in coffee roasting according to the criteria, it can be concluded that roasting using a coffee roasting machine with a rotary working principle of an initial temperature of 180℃ can produce a light roast in 3 roasting experiments, the average value of which is Light Roast at a temperature of 162.5 . Medium Roast 164.4 . Dark Roast 168.1 . For rotary shaft analysis, coffee roasting machines get the feasibility results from the moment given during installation using Autodesk Inventor 2019 analysis for the shaft to get a load of 100,000 N/mm in the Von Mises category 0.479368 MPa, 1st principal stress 0.35322 MPa, 3rd principal stress 0.0449345 MPa, Displacement 0.00601512 mm, Safety Factor 15 ul.

Perancangan Sistem Transmisi ada Mesin Pengupas Pinang Menggunakan Penggerak Mesin Diesel 6 HP Elsa Nova Andini; Razali Razali
INOVTEK - SERI MESIN Vol 2, No 2 (2022)
Publisher : Politeknik Negeri Bengkalis

Proses pengupasan pinang oleh masyarakat Kabupaten Bengkalis masih banyak dilakukan secara manual menggunakan cungkil, hal ini dapat memperlambat dan memakan waktu yang lama. Oleh karena itu, perlu diciptakan mesin dengan menggunakan transmisi yang mampu meredam kejutan dan terjangkau oleh masyarakat. Tujuan dari penelitian ini adalah untuk mendapatkan kupasan pinang yang baik dan meningkatkan produksi karena mesin ini dapat menghemat waktu dan tenaga. Metode yang digunakan adalah dengan melakukan studi lapangan kemudian melakukan studi literature dan memulai perancangan serta pengumpulan data dan bahan yang akan digunakan dalam proses pembuatan alat tersebut. Berdasarkan perhitungan komponen transmisi yaitu menggunakan sabuk-V 64 tipe B, ukuran puli 10 inch, dan diameter poros 25 cm. Berdasarkan perhitungan kapasitas alat yang didapatkan sebesar 197,5 kg/jam. Dari hasil penelitian dengan 2 kg pinang kering diperoleh hasil pinang yang paling banyak terkupas dengan kualitas baik yaitu 1,091 kg dan yang tidak terkupas sebanyak 0,07 kg dengan waktu pengupasan 21 detik. Biji pinang yang berkualitas didapat pada kecepatan putaran mesin 1600 rpm.

Experimental investigation of wear-hardness trade-off mapping for quenched HSS tools under different quenching media and austenitizing temperatures Razali, Razali; Setyawan, Reinaldi Teguh; Yendra, Alfazan Yendra
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.8733

This study investigates the wear-hardness trade-off of quenched AISI M2 High-Speed Steel (HSS) cutting tools subjected to three austenitizing temperatures (800, 900, and 1000°C) and three quenching media (salt water, Bromus oil, and SAE 20 oil), without subsequent tempering treatment. A factorial dataset consisting of three austenitizing temperatures (800, 900, and 1000°C) and three quenching media (salt water, Bromus oil, and SAE 20 oil) was analyzed under fixed turning parameters (n=300 rpm, f=0.19 mm/rev, a_p=1.5 mm). Tool performance was evaluated using flank wear (VB) and Rockwell hardness (HRC), with five hardness readings per condition to quantify repeatability. The results show a dominant temperature effect: VB decreases monotonically as austenitizing temperature increases, while hardness rises markedly at 1000°C, forming a favorable region with simultaneously low wear and high hardness. The best combined performance was obtained at 1000°C with SAE 20 oil, achieving VB = 0.066 mm and HRC ≈ 82.8. A desirability-style composite index D, derived from normalized VB (smaller-is-better) and HRC (larger-is-better), produced decision and rank maps that consistently identified the 1000°C region as the optimal operating window, with oil quenching preferred when high-temperature austenitizing is feasible. Hardness repeatability metrics further indicated that the 1000°C conditions exhibit the lowest scatter, strengthening their practical robustness. The proposed mapping framework offers a compact, reproducible approach to visualize the wear–hardness trade-off and to rank heat-treatment conditions using existing experimental data.

Co-Authors Abdul Wahid Muharram Ade Safri Mahadar Ahmad Riadi Dian Ardiana Doni Afrianto Afrianto Elsa Nova Andini Fidhilatul Hikmi Imam Sutadi Muhammat Tarmizi Muharnis Muharnis Reinaldi Teguh Setyawan Stephan Stephan Stephan Stephan Stephan Stephan Syahrizal Syahrizal Yendra, Alfazan Yendra

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