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All Journal Rekayasa Mesin Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Jurnal Multidisipliner Kapalamada PHENOMENON : MULTIDISCIPLINARY JOURNAL OF SCIENCES AND RESEARCH
Sahputra, Wahyu Puji
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MOLD DESIGN AND FLOW ANALYSIS FOR PRODUCT PROPELLER APC SF 11X4.7 WITH MINIMUM SHRINKAGE AND WARPAGE Sahputra, Wahyu Puji; Budiyantoro, Cahyo; Nugroho, Gesang; Adam, Muhammad Kevin
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1669

Abstract

Making molds in the injection molding manufacturing process is one of the basic steps that functions to prevent product defects during the production process. The product defects that most often occur in this manufacturing process include shrinkage and warpage defects. This research will discuss the mold design for the APC SF 11x4.7 propeller product with a twist variation of 45o and minimum shrinkage and warpage values. Glass Fiber Reinforced Polypropylene (GFRPP) will be used as the propeller product material. The entire design process to testing will be carried out using software assistance. The Taguchi method with an L9 orthogonal array matrix (34) was used in this research. where L9 explains that the experiment will be carried out nine times, and 34 means there are three levels and four main factors. The four main factors consist of packing pressure, packing time, melting temperature and injection pressure. The Taguchi method is used with the aim of making it easier to find the variation value that produces the lowest shrinkage and warping defects in the product. The simulation results show that the variation with the smallest shrinkage value produces a value of 7.9% and the variation with the smallest warpage value produces a value of 1.051 mm
ANALYSIS OF THE EFFECT OF MACHINING VARIABLES ON SURFACE ROUGHNESS AND VIBRATION AMPLITUDE IN TURNING AISI 1045 STEEL USING THE TAGUCHI METHOD Aji, Angga Asteriasti; Cesar Putra, Fachrizal; Badia, Bahdin Ahad; Idris Putra, Muhammad; Sahputra, Wahyu Puji; Darwis, Mardis; Hasudungan Simanjuntak, Raja Agung
PHENOMENON : Multidisciplinary Journal Of Sciences and Research Vol 3 No 01 (2025): PHENOMENON : Multidisciplinary Journal Of Sciences And Research
Publisher : Pusat Studi Ekonomi Publikasi Ilmiah dan Pengembangan SDM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62668/phenomenon.v3i1.1406

Abstract

The development of the manufacturing industry is growing very rapidly so that the products of the manufacturing industry must have high quality, especially machining products such as turning products. This research investigates the effect of turning parameters, namely feed and spindle rotation on surface roughness and vibration amplitude of turning AISI 1045 steel using carbide tools. Surface roughness measurements were taken using an OLS4100 Microscope and vibration amplitude was measured using a Vibxpert II. From the results of the analysis conducted, the feed factor is the most significant factor on the results of surface roughness and vibration amplitude. The most optimal machining parameters for surface roughness are feed 0.1 mm/put (lvl 1), spindle speed 400 rpm (lvl4) with a surface roughness value of 4.757 µm. The most optimal machining parameters for vibration amplitude are feed 0.1 mm/put (lvl 1) and spindle speed 100 rpm (lvl 1) with a vibration amplitude value of 0.11 m/s.
REKAYASA PROSES EKSTRAKSI DAN PENGELOLAHAN BIJI NIKEL: TEKNOLOGI, TANTANGAN, DAN PROSPEK MASA DEPAN Sahputra, Wahyu Puji; Badia, Bahdin Ahad; Putra, Muhammad Idris; Putra, Fahrizal Cesar; Aji, Angga Asteriasti
Jurnal Multidisipliner Kapalamada Vol. 4 No. 02 (2025): JURNAL MULTIDISIPLINER KAPALAMADA
Publisher : Pusat Studi Ekonomi, Publikasi Ilmiah dan Pengembangan SDM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62668/kapalamada.v4i02.1546

Abstract

Global nickel demand is rapidly increasing in line with the transition to low-carbon technologies, particularly in the electric vehicle battery industry. This study conducts a systematic literature review of 40 publications (2020–2025) on nickel ore extraction technologies, challenges, and sustainable future prospects. About 55% of the studies discuss pyrometallurgy (RKEF, Blast Furnace) with Ni recovery of 90–95%, energy consumption of 5,500–6,500 kWh/t, and CO? emissions of 15–25 t/t Ni. Around 30% examine HPAL, which processes low-grade limonite with lower energy use, high investment (>USD 1 billion), and complex waste management. The remaining 15% focus on bioleaching (75–85% recovery, ~80% lower energy use, though with long processing time) and selective reduction (Fe?O? reduction at 1,100–1,200 °C, 15–20% lower energy consumption, Ni recovery of 90–93%). Challenges include ore mineralogy variation, nickel price fluctuations, and environmental impact. As the world’s top producer (~50% in 2024), Indonesia must optimize downstream policy and sustainability. Future prospects include commercializing alternative technologies and integrating renewable energy to reduce carbon footprint by up to 60%.
Optimasi Parameter Pembubutan Baja AISI 1045 Menggunakan Metode Taguchi Aji, Angga Asteriasti; Badia, Bahdin Ahad; Putra, Muhammad Idris; Putra, Fachrizal Cesar; Sahputra, Wahyu Puji; Darwis, Mardis; Simanjuntak, Raja Agung Hasudungan
Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Vol 11, No 2 (2025): Oktober
Publisher : universitas teuku umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jmkn.v11i2.13719

Abstract

AbstrakIndustri manufaktur mengalami pertumbuhan pesat, sehingga produk yang dihasilkan, terutama melalui proses permesinan seperti pembubutan, harus memiliki kualitas yang tinggi. Penelitian ini bertujuan untuk menganalisis pengaruh parameter pembubutan, seperti feed dan putaran spindle, terhadap kekasaran permukaan dan amplitudo getaran pada pembubutan baja AISI 1045 menggunakan pahat karbida. Pengukuran kekasaran permukaan dilakukan dengan Microscope OLS4100, sementara amplitudo getaran diukur menggunakan VibXpert II. Data yang diperoleh dianalisis dengan menggunakan Minitab Statistical Software 22. Hasil analisis menunjukkan bahwa feed memiliki pengaruh paling signifikan terhadap kekasaran permukaan dan amplitudo getaran. Parameter pembubutan yang paling optimal untuk menghasilkan kekasaran permukaan terbaik adalah feed 0,1 mm/put (lvl 1) dan kecepatan spindle 400 rpm (lvl 4), dengan nilai kekasaran permukaan sebesar 4,757 μm. Sementara itu, parameter yang paling optimal untuk mengurangi amplitudo getaran adalah feed 0,1 mm/put (lvl 1) dan kecepatan spindle 100 rpm (lvl 1), dengan nilai amplitudo getaran sebesar 0,11 m/s.
MOLD DESIGN AND FLOW ANALYSIS FOR PRODUCT PROPELLER APC SF 11X4.7 WITH MINIMUM SHRINKAGE AND WARPAGE Sahputra, Wahyu Puji; Budiyantoro, Cahyo; Nugroho, Gesang; Adam, Muhammad Kevin
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1669

Abstract

Making molds in the injection molding manufacturing process is one of the basic steps that functions to prevent product defects during the production process. The product defects that most often occur in this manufacturing process include shrinkage and warpage defects. This research will discuss the mold design for the APC SF 11x4.7 propeller product with a twist variation of 45o and minimum shrinkage and warpage values. Glass Fiber Reinforced Polypropylene (GFRPP) will be used as the propeller product material. The entire design process to testing will be carried out using software assistance. The Taguchi method with an L9 orthogonal array matrix (34) was used in this research. where L9 explains that the experiment will be carried out nine times, and 34 means there are three levels and four main factors. The four main factors consist of packing pressure, packing time, melting temperature and injection pressure. The Taguchi method is used with the aim of making it easier to find the variation value that produces the lowest shrinkage and warping defects in the product. The simulation results show that the variation with the smallest shrinkage value produces a value of 7.9% and the variation with the smallest warpage value produces a value of 1.051 mm
Co-Authors Adam, Muhammad Kevin Aji, Angga Asteriasti Budiyantoro, Cahyo Cesar Putra, Fachrizal Darwis, Mardis Gesang Nugroho Idris Putra, Muhammad Putra, Fachrizal Cesar Putra, Fahrizal Cesar Putra, Muhammad Idris Rahman, Muhammad Budi Nur Simanjuntak, Raja Agung Hasudungan