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All Journal Sprocket : Journal of Mechanical Engineering
Miduk Tampubolon
Universitas HKBP Nommensen
Automotive Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Perhitungan Energi Bagi Kebutuhan Pengepresan Kopra Pada Perancangan Mesin Press Minyak Kelapa Richard A M Napitupulu; Alberto Hutauruk; Miduk Tampubolon; Lestina Siagian; Parulian Siagian
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 1 No 1 (2019): Edisi Agustus 2019
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (313.749 KB) | DOI: 10.36655/sproket.v1i1.33

Abstract

An experiment has been conducted to determine the amount of deformation energy and energy per volume needed for the design of coconut oil press machines. By using a press tube with a diameter of 59 mm and by varying the load of press and speed of press the results obtained that to produce the optimal average volume of coconut oil are at the pressure load of 40 KN and the pressure rate of 6 mm / minute. The ideal energy per volume used to suppress coconut oil press machine is 6.106 J / m3.
Laju Korosi Pada Baja Karbon Sedang Akibat Proses Pencelupan Pada Larutan Asam Sulfat (H2SO4) dan Asam Klorida (HCl) dengan Waktu Bervariasi Miduk Tampubolon; Roy Ganda Gultom; Lestina Siagian; Partahi Lumbangaol; Charles Manurung
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 1 (2020): Edisi Agustus 2020
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (309.24 KB) | DOI: 10.36655/sproket.v2i1.294

Abstract

An experiment has been conducted to determine corrosion rate of medium carbon stell with sulfuric acid solution, Aquades 90,2% + H2SO4 9,8% and hydrochloric acid solution, Aquades 96,8% + HCl 3,2%. By using weight loss method, if medium carbon steel dipped into sulfuric acid solution then the corrosion rate is faster than it dipped into hydrochloric solution. If medium carbon steel dipped in a long time than the corrosion rate slowing down.
Pengaruh Kecepatan, Temperatur dan Infill Terhadap Kualitas dan Kekasaran Kotak Relay Lampu Sign Sepedamotor Hasil dari 3D Printing Joy H Panjaitan; Miduk Tampubolon; Fiktor Sihombing; Jamser Simanjuntak
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 2 No 2 (2021): Edisi Februari 2021
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (306.349 KB) | DOI: 10.36655/sproket.v2i2.530

Abstract

3D printing technology has great potential in today's manufacturing world where one of its uses is in the prototype of a product. One of the most famous and inexpensive 3D printing technologies is the Fused Deposition Modeling (FDM) method. Many studies have been carried out using this FDM method. In this study, the printing of motorbike light relay boxes was carried out using the FDM method with two variations of speed, temperature and infill of each mass. 3D Printing uses a nozzle diameter of 0.4 mm and a work table temperature of 60oC and a height of 0.2 mm for each layer with support every where. From the research results, all the products produced have a rough surface with a level of geometric accuracy ranging from 0.91% for the length dimension and 7.73% for the width dimension of the product.
Co-Authors Alberto Hutauruk Charles Manurung Fiktor Sihombing Jamser Simanjuntak Joy H Panjaitan Lestina Siagian Lestina Siagian Lumbangaol, Partahi Parulian Siagian Richard A M Napitupulu Roy Ganda Gultom