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Novarika, Wirda
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PENGARUH PARAMETER PROSES RAPID PROTOTYPING DENGAN TEKNOLOGI STEREOLITHOGRAPHY TERHADAP KEKERASAN SPESIMEN UJI Novarika, Wirda; Ginting, Muchtar; Sani, Almadora Anwar; Astra, Dicki
AUSTENIT Vol. 11 No. 2 (2019): AUSTENIT: Oktober 2019
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (206.101 KB)

Abstract

Tujuan utama dari penelitian ini adalah untuk mengetahui kekerasan material resin spesimen roda gigi dengan menggunakan prameter berbeda. Pada proses pengujian ini penguji menggunakan alat uji kekerasan Brinnel (HB / BHN), yang menggunakan indentor bola baja ⌀5 mm dan P(Kg) 250 Kg. Hasil dari pengujian ini didapatkan bahwa pengaruh prameter Exposure Time berpengaruh terhadap kekerasan. Teknik pengumpulan data yang dilakukan dengan cara Studi Literatur, observasi dan Konsultasi. Dalam pengolahan data penelitian ini menggunakan metode analisis Statistical Anova.
DISAIN ALAT PENEPAT PENGELASAN KIT PEMADAM KEBAKARAN Wilza, Romi; Novarika, Wirda; Rasid, M.; Herlambang, Yusuf Dewantoro; Arifin, Fatahul; Ikbal, Muhammad; Hadi, Kms. M.
AUSTENIT Vol. 14 No. 1 (2022): AUSTENIT: April 2022
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/austenit.v14i1.4397

Abstract

Fire is a disaster that no one wants. Fires can occur anytime and anywhere, one of which is offices, buildings, warehouses, and even forests. Fires in buildings can cause losses in both material and non-material properties. To extinguish the fire, you need supporting equipment, for example a Fire Extinguisher Kit (FEK), which is a fire hose reel. To produce this tool, a production aid is needed in terms of gripping the workpiece that will be used as a fire fighting kit product. Fire Hose Reel production aids are production workpiece holder tools that are used in order to make accurate doubling of components to get good work results in production, of course there should be compatibility in terms of the position of the workpiece with the machine used. The fixing device is used which is designed to position, hold, and support each part so every welding performed is within the specified limits. In the process of designing and manufacturing, this Welding Tool for Production of FEK uses software to calculate the load that these production aids can withstand and for the manufacturing process tools such as cutting grinders, drilling machines and other bench work tools are used. This tool can withstand the weight of objects up to 50 kg. with a deflection of 0.055 mm.
Analisis Preventif Maintenance pada Forklift dan Reach Truck dengan Metode Menghitung Mean Time Between Failure (MTBF) dan Mean Time to Repair (MTTR) di PT Medan Distribusindo Raya Novarika, Wirda; Putri, Cut; Suliawati, Suliawati
JOURNAL OF INDUSTRIAL AND MANUFACTURE ENGINEERING Vol. 9 No. 2 (2025): EDISI NOVEMBER
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jime.v9i2.16595

Abstract

Penelitian ini bertujuan untuk menganalisis efektivitas preventive maintenance pada forklift dan reach truck di PT Medan Distribusindo Raya melalui perhitungan Mean Time Between Failure (MTBF), Mean Time To Repair (MTTR), dan Risk Priority Number (RPN). Berdasarkan data kerusakan tahun 2024, nilai MTBF forklift dan reach truck tercatat sebesar ±717 jam, sementara MTTR rata-rata berada pada 1,79 jam. Komponen dengan kontribusi kerusakan terbesar diidentifikasi melalui perhitungan RPN, yaitu hydraulic pump, battery forklift, battery 48V/lithium, dan silinder hidrolik. Hasil analisis menunjukkan bahwa interval preventive maintenance yang optimal berada pada rentang 15–21 hari atau 40–70% dari nilai MTBF, sehingga perawatan dapat dilakukan sebelum terjadinya kegagalan. Penerapan strategi pemeliharaan berbasis MTBF–MTTR terbukti meningkatkan nilai availability menjadi 99,77% pada forklift dan 99,75% pada reach truck. Dengan demikian, metode ini mampu meningkatkan keandalan peralatan serta menurunkan downtime secara signifikan.
Co-Authors Astra, Dicki Azharuddin Azharuddin, Azharuddin Eriandi, M Dede Fatahul Arifin, Fatahul Fikriyyah, Fachrun Ginting, Muchtar Hadi, Kms. M. Hasibuan, Abdurrozaq Hasibuan, Abdurrozzaq Iskandar Iskandar Khoir, Rizal Abdul Muhammad Ikbal Putri, Cut Putri, Sucy Indika Rafiky, Irzan Rasid, M. Sani, Almadora Anwar Sibuea, Siti Rahmah Sitanggang, Ellawati Suliawati Suliawati, Suliawati Sultan, Kelana Syahdani, Rama Taroma, Steffi Monic Wilza, Romi Yusuf Dewantoro Herlambang