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Journal Mechanical Engineering
Published by Politeknik Negeri Ambon
ISSN : -     EISSN : 29884977     DOI : https://doi.org/10.31959
Core Subject : Engineering,
Industrial & Manufacturing Engineering Mechanical Engineering
Manufaktur, Perawatan, Otomotif, Teknik Produksi Migas dan Teknologi Rekayasa Sistem Mekanikal Migas
Arjuna Subject : Teknik (semua kategori) - Mekanik Material
Articles 113 Documents
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Pengaruh Temperature Tempering Terhadap Kekerasan Pada Baja Karbon Sedang Hasil Pengelasan FCAW (Flux-Cored Arc Welding) Clara Sekeroney; Nevada. J.M Nanulaita; Frederick Dematacco; Mohammad Anas Fikri; Ike Dayi Febriana
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2098

Abstract

Carbon steel is a type of alloy steel consisting of various elements, especially iron (Fe) and carbon (C). In general, the properties of steel are affected by the percentage of carbon and the microstructure of steel which is affected by steel composition and heat treatment. The welding process can change the structure and composition of steel. The safety of weld results can be carried out after welding using a heat treatment process. This tempering aims to obtain better and desired mechanical properties. Tempering is carried out using temperatures of 200⁰C, 250⁰C and 300⁰C with cooling using air media and mechanical testing will be carried out.The results of this research showed that tempering temperature had an effect on the hardness value of medium carbon steel resulting from FCAW welding. The hardness value at a temperature of 200℃ was 54.75, a temperature of 250℃ was 53.00 and a temperature of 300℃ was 52.04. The higher the temperature, the lower the hardness value and conversely, the lower the tempering temperature, the higher the hardness value.Keywords: Welding, Tempering, Hardness
Analisa Pengaruh Waktu Penahanan (Holding Time) Pada Proses Tempering Terhadap Sifat Mekanis Baja Karbon Menengah Hasil Pengelasan Fcaw (Flux Core Arc Welding) Rey Joy Toding Padang; Nevada. J.M Nanulaita; Cley Talkua; Agustinus O. Lopuhaa; Faizatur Rohmah
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2099

Abstract

FCAW (Flux Core Arc Welding) welding is a type of welding process or joining metal materials that uses a heat source from electrical energy which is converted or converted into heat energy. a roll and uses gas as a protector for the weld metal which melts during the welding process. The content of medium carbon steel is 0.3%C - 0.6%C. This carbon steel has advantages compared to low carbon steel, medium carbon steel has stronger mechanical properties with a higher level of hardness than low carbon steel. . Before and after welding carbon steel materials, material testing will be carried out. With this test, it is hoped that the hardness and bending strength of the material will be known. The method used is a quantitative method including experimental research. With a plate thickness of 5mm, a variation of the V seam angle with an angle of 45° with a depth of 2.5mm. Using a stickout height of 5mm by varying the holding time, namely 30 minutes, 60 minutes, 90 minutes for FCAW welding  Keywords: Carbon steel, FCAW (Flux Core Arc Welding), Holding Time, Hardness Test, Bending Test
Penggunaan Saringan Sebagai Alat Untuk Membantu Mengurangi Kadar Merkuri Yang Tercemar Di Desa Debowae Kecamatan Waelata Kabupaten Buru Provinsi Maluku Alfiansa Umasugi; Erwin. B. Pattykayhattu; M. Said Karyani; Amin Jakfar
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2100

Abstract

Gold mining activities on Buru Island legally or illegally cause water at several coordinate points to be contaminated with heavy metal types of mercury (Hg). Knowing the level of mercury in water is important to determine whether or not water can be consumed. This study aims to determine the level of mercury spread and how to overcome environmental damage due to mercury in water using eucalyptus charcoal. The method used in this study is quantitative by collecting data by observation, interviews, and literature studies. The variable in the study was filtering as a tool to reduce polluted mercury levels. The results of this study were carried out at 3 coordinates and 2 of the 3 coordinates showed a decrease in mercury levels, namely in the coodninat of the father's house, sub-district and village hall successively decreased by 18 μg / L and 2 μg / L. From the results it can be concluded that the level of mercury levels does not exceed the Quality standard figures placed according to the Ministry of Environment and Forestry No.Kep 51 of 2004 and eucalyptus charcoal can reduce mercury levels deposited in water. Based on the results of the research conducted, it turns out that there are still many shortcomings using this method. For future researchers who want to conduct similar research, in order to complement by answering the shortcomings of this study. Keywords: mercury, eucalyptus, filter
Analisis Ketebalan Dinding Pelat Dan Sisa Umur Pada Tangki 11 – 15000kl Di PT. Pertamina Patra Niaga Integrated Terminal Wayame Kota Ambon Arun setiawan; Eka R. M. A. P. Lilipaly; Edison Effendi; Berthy Pelasula
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2102

Abstract

Abstrak Tangki penimbun (storage tank) merupakan salah satu peralatan yang sangat vital pada proses produksi industri perminyakan yang berfungi sebagai tempat penyimpanan dan penimbunan bahan cair, baik berupa minyak mentah, produk BBM, hasil minyak olahan, maupun bahan-bahan kimia lainnya. Korosi merupakan salah satu hal yang menjadi penghalang dalam sebuah proses penyimpanan terlebih lagi dalam fluida cair. Metode yang digunakan dalam pembahasan diawali dengan studi literatur dari berbagai referensi dan penelitian sebelumnya, kemudian pengambilan data lapangan dan kemudian dianalisa.. Dari hasil pengukuran yang diambil pada bulan september 2023, untuk kondisi Tangki 11-15000KL masih bagus ditandai dengan ketebalan course 1-8 masih diatas batas minimum yang sudah ditentukan. Untuk course 1 Tact sebesar 18,77 mm dengan Tmin sebesar 13,22 mm dengan laju korosi sebesar 0,15 mm/tahun dan sisa umur sebesar 37 tahun. Untuk course 2 Tact sebesar 15,84 mm dengan Tmin sebesar 11,81 mm dengan laju korosi sebesar 0,145 mm/tahun dan sisa umur sebesar 27 tahun. Untuk course 3 Tact sebesar 15,06 mm dengan Tmin sebesar 9,45 mm dengan laju korosi sebesar 0,07 mm/tahun dan sisa umur sebesar 80 tahun. Untuk course 4 Tact sebesar 13,17 mm dengan Tmin sebesar 8,17 mm dengan laju korosi sebesar 0,06 mm/tahun dan sisa umur sebesar 83 tahun. Untuk course 5 Tact sebesar 10,23 mm dengan Tmin sebesar 6,89 mm dengan laju korosi sebesar 0,07 mm/tahun dan sisa umur sebesar 47 tahun. Untuk course 6 Tact sebesar 9,55 mm dengan Tmin sebesar 5,61 mm dengan laju korosi sebesar 0,08 mm/tahun dan sisa umur sebesar 60 tahun .Untuk course 7 Tact sebesar 9,26 mm dengan Tmin sebesar 4,33 mm dengan laju korosi sebesar 0,08 mm/tahun dan sisa umur sebesar 63 tahun. Untuk course 8 Tact sebesar 9,50 mm dengan Tmin sebesar 2,54 mm dengan laju korosi sebesar 0,08 mm/tahun dan sisa umur sebesar 84 tahun Dapat disimpulkan kondisi Tangki 11-15000KL masih dalam kondisi baik. Kata kunci: Tangki timbun,minyak,laju korosi,sisa umur tangki,ketebalan tangki
Pengaruh Variasi Arus Pengelasan Gas Metal Arc Welding (GWAM) Terhadap Sifat Mekanis Pada Sifat Seamless Gracia Irene Huka; Leslie. S. Loppies; Josef Matheus; Auliana Diah Wilujeng; Abdul Hamid
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2116

Abstract

GMAW welding is a metal joining process with a melting process with the addition of a coil of wire in the form of electrodes and protective gas. Seamlees pipe, also known as seamless pipe, is an iron pipe without a connection. This study aims to produce data from the results of bending and impact testing on seamlees pipes by varying the welding current with a current of 21.5 volts, 22.5 volts, and 23.5 volts in GMAW welding. After the seamless pipe is welded, impact and bending tests are carried out on the seamlees pipe. From the bending/bending strength test, the highest flexural strength occurred at a current of 21.5 and 22.5 volts, while the lowest flexural strength occurred at a current of 23.5 volts. From the impact test, the highest strength occurred at 21.5 and 22.5 volts and the lowest was at 23.5 volts.  Keywords: Seamlees pipe, GMAW welder, Bending Strength, Impact Strength.  
PENGARUH VARIASI SUDUT PENGELASAN KAMPUH V DAN KETINGGIAN ELEKTRIKAL STICK OUT PENGELASAN GMAW TERHADAP SIFAT MEKANIS BAJA ST-42 Fredrik Demataco; Nevada. J.M Nanulaita; Lukman Hadiwijaya; Ratna Ayu Pawestri Kusuma Dewi
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2120

Abstract

GMAW (Gas Metal Arc Welding), which is a solid or tubular welding electrode that is fed continuously mechanically from a roll of electrode wire inside the welding machine. The electrode is fed via a gun or torch by maintaining the height of the arc formed between the tip of the electrode wire and the material being welded or the base metal. GMAW (Gas Metal Arc Welding) is MAG (Metal Active Gas) and MIG (Metal Inert Gas) welding which is very efficient and fast in the process.Low carbon steel contains less than 0.3% carbon in the carbon steel mixture. Low carbon steel cannot be hardened because the carbon content is not enough to form a martensite structure. Welded joints are material or plate joints that are used for the welding process with the aim of getting maximum penetration from the joint.In this research, we are looking at the effect of the GMAW (Gas Metal Arc Welding) welding process with MIG (Metal Inert Gas) type on ST-42 steel by varying the V seam angle with a stick out height of 5 mm on the mechanical properties in the HAZ area.The hardness value before the welding process at an angle of 15 is in the HAZ area of 30.03 HRD for corners 30 and 45 is 32.51 HRD and 33.98 HRD, while for the impact strength at an angle of 15 is 0.2725 J/mm2, an angle of 30  and 45 namely 0.2439 J/mm2 and 0.2320 J/mm2 Keywords: Welding, HAZ (Heat Affected Zone), Impact Strength, Hardness
Pengaruh Variasi Persentase Hardener pada Campuran Clear Coat Terhadap Kekerasan Cat Pada Pengecatan Body Kendaraan Hermon Latumaerissa; Nevada. J.M Nanulaita; Roy R Lekatompessy; Laily Ulfiyah
Journal Mechanical Engineering Vol. 1 No. 3 (2023): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v1i3.2121

Abstract

Painting is a process of applying paint in liquid form to an object, to create a thin layer which then creates a hard layer or layer of paint. The function of painting itself is to give a layer to an object so that the object's lifespan can be longer. Attachment of paint to the surface can be done in many ways, wiping, smearing, brushing, spraying, dipping or in other ways. Attachment of paint by spraying is the paint attachment that is most often found in automotive painting workshops. Apart from that, attaching paint by spraying is easier in adjusting the area where painting will be carried out, the results are also good if done correctly. The quality of good painting results is influenced by many factors such as skills, materials used, etc., while determining good painting results is based on several factors, such as surface roughness, gloss power, etc. The hardness of the painting results is also greatly influenced by the percentage of hardener mixture in the paint mixture. The paint in question here is color paint (top coat). This research is to determine the best percentage of clearcoat in the painting process by testing the hardness of the painting results. The results obtained by varying the percentage of the mixture in the best clearcoat are in the percentage variations of 100 (Base): 55 (Hardener) + Thiner or Solvent (10% of Base) is 83.49 H, 100 (Base): 55 (Hardener) + Thiner or Solven (10% of Base) is 82.99 H, 100 (Base) : 45 (Hardener) + Thiner or Solven (10% from Base) is 82.51 H and the lowest is the variation 100 (Base): 60 (Hardener) + Thiner or Solvent (10% of Base) namely 79.57 H. Keywords: Painting, Clearcoat, Hardener and Paint hardness
ANALISA PENGARUH VARIASI KUAT ARUS PENGELASAN FLUX CORED ARC WELDING (FCAW) TERHADAP SIFAT KEKERASAN PADA DAERAH HAZ BAJA KARBON RENDAH Graciadiana. I. Huka; Josef Matheus; Nevada JM. Nanulaitta; Erwin Bravor Pattikayhatu
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2579

Abstract

Welding is a process of joining metals by utilizing electric power as a source of welding heat. Flux-Core Arc Welding (FCAW) is a welding process that uses a heat source from electricity that is converted into a heat source in an electric arc, in this FCAW welding the type of protection used is flux or powder that is in the core of the welding wire (the welding wire is rolled in a roll). This research aims to observe changes in hardness values after welding, both low carbon steel hardness in the HAZ (Heat Affected Zone) area and outside the HAZ (Heat Affected Zone) area. Welding using V-joints with angles of 45° and 60° and varying the voltage strength at 16 volts, 18 volts and 20 volts. Hardness testing using the Rockwell method where the highest hardness value of the HAZ area for 45 is 22.95 HRD at a voltage strength of 20 volts. For V-joints for an angle of 60°, the highest hardness value of the HAZ area is also at a voltage strength of 20 volts with a value of 24.10 HRD. The highest increase in hardness value is at the V-angle 60° joint with a voltage of 20 volts with a hardness value of 21 HRD while the lowest is the V-angle 45° joint with a voltage of 16 volts at 18.67 HRD. Keywords: Hardness Value, HAZ (Heat Affected Zone), FCAW (Flux Cored Arc Welding)
ANALISIA PENENTUAN UMUR PAKAI TANGKI TIMBUN 01-50 TON DI PT.PLN (PERSERO) UIW MALUKU DAN MALUKU UTARA KANTOR PELAYANAN KIANDARAT Gahsar Rumaday; Leslie. S. Loppies; Nevada J. M. Nanulaitta
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2580

Abstract

In the oil and gas industry, tanks play a crucial role as storage containers for fluids and fuel oil products, both in the form of volatile, pressurized, and flammable fluids. In addition, tanks are not only found in the oil and gas industry, but also in other sectors such as power plants. In the long period of use, the tank may be damaged due to several factors, including plate depletion caused by cor rosion. This problem can affect the integrity of the tank so that an inspection of the condition of the tank needs to be carried out. The inspection of tank plate thickness and corrosion rate was carried out using the Non-Destructive Examination (NDE) method with the Benetech GM100 Ultrasonic Thickness Gaugge tool. This inspection is urgently needed to determine the remaining life of the tank with reference to the API 653 and API 575 standards. The method used started from literature studies in various references and previous research, after which field data collection was then analyzed in accordance with the findings and applicable provisions. Based on the results of measurements in April 2024, the condition of the 01-50 ton tank is still in good condition, marked by the thickness of course 1-3 is still above the minimum limit that has been determined. For Course 1 Tact is 4.3 mm and Tmin is 0.4064 mm with a corrosion rate of 0.0875 mm/year and a remaining life of 44.49 years. For Course 2 Tact is 4.1 mm and Tmin is 0.2032 mm with a corrosion rate of 0.1125 mm/year and a remaining life of 24.63 years. For Course 3 Tact of 3.9 mm and Tmin of 0.1016 mm with a corrosion rate of 0.1375 mm/year and a remaining life of 28.35 years. It can be concluded that the condition of the 01-50 Ton tank is still in good condition. Keywords: (tank, power plant, plate thickness, corrosion rate, remaining tank life)
ANALISIS PERBANDINGAN HASIL PEMBUATAN VIRGIN COCONUT OIL (VCO) MENGGUNAKAN PENAMBAHAN RAGI DAN TANPA PENAMBAHAN RAGI Muhammad Said Karyani
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2581

Abstract

A comparative analysis of the results of making VCO using the addition of yeast and without using the addition of yeast has been carried out. The method used is a simple experiment, namely measuring the volume of VCO produced and the quality of the product produced (taste, smell, color) with the control variable being the length of fermentation, 1 hour, 3 hours, 5 hours, 7 hours, 9 hours and 11 hours using yeast. fermipan as much as 0.1% and without using yeast. The results show that there is a difference in the growth rate of VCO formation with the addition of yeast and without the addition of yeast. The growth rate of VCO formation using yeast begins to occur during fermentation from the first 1 hour to the next 3 hours, namely the VCO produced starts from 26 mL to 92 mL, after that time interval, in the next 2 hours the growth rate of VCO formation begins to decrease. Meanwhile, the growth of VCO formation without yeast during fermentation since the first 1 hour interval has not occurred significantly, namely only 7 ml of VCO produced. This and the growth of VCO formation only started to increase after 3 hours and then reached 22 ml. Testing the organoleptic properties of the VCO produced, there was no significant difference between the VCO produced with the addition of yeast and without the addition of yeast. Keywords: Virgin Coconut Oil, VCO, Fermentation, Growth Rate, Yeast

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