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Machine : Jurnal Teknik Mesin
Published by Universitas Bangka Belitung
ISSN : 25022040     EISSN : 25810138     DOI : -
Core Subject : Engineering,
Automotive Engineering Mechanical Engineering
Arjuna Subject : -
Articles 180 Documents
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ANALISIS PENGARUH VARIASI AMPERE PENGELASAN FCAW ANTARA BAJA GRADE EH36 DENGAN GRADE A TERHADAP SIFAT MEKANIK Widodo, Risriki; Purwanto, Purwanto; Siswadi, Siswadi
Machine : Jurnal Teknik Mesin Vol 10 No 2 (2024): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v10i2.5407

Abstract

Industri maritim ditunjang oleh keberadaan galangan kapal sehingga teknologi pengelasan Flux Core Arc Wellding (FCAW) digunakan dalam pembangunan kapal pembangkit listrik terapung. Tujuan dari penelitian ini adalah mengetahui dampak dari variasi ampere pada hasil pengelasan FCAW material Grade EH36 tebal 24 mm dengan material Grade A tebal 16 mm posisi flat (1G) pada main deck kapal. Dalam penelitian ini akan dianalisis pengaruh variasi ampere terhadap uji radiografi, struktur makro dan kuat tarik. Variasi ampere yang digunakan 160 A, 200 A dan 250 A. Pada hasil pengujian radiografi tidak ditemukan cacat pengelasan pada weld metal. Pada hasil pengamatan struktur makro tidak ditemukan cacat pengelasan. Hasil pengujian kuat tarik pada spesimen dengan variasi 160 A didapatkan nilai kekuatan luluh (yield strenght) 293,73 MPa dan nilai kekuatan tarik (ultimate strenght) 445,71 MPa, pada spesimen dengan variasi 200 A didapatkan nilai kekuatan luluh (yield strenght) 298,61 MPa dan nilai kekuatan tarik (ultimate strenght) 453,56 MPa sedangkan pada spesimen dengan variasi 250 A didapatkan nilai kekuatan luluh (yield strenght) 294,20 MPa dan nilai kekuatan tarik (ultimate strenght) 445,71 MPa
PERANCANGAN MESIN EXTRUDER FILAMEN 3D PRINTING BERBAHAN SAMPAH PLASTIK KAPASITAS 40 KG/JAM Santoso, Deri Teguh; Saputra, Fadillah Anugrah; Sari, Rianita Puspa
Machine : Jurnal Teknik Mesin Vol 10 No 2 (2024): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v10i2.5413

Abstract

Plastics have experienced a rapid increase in production over the last 70 years. Initially, in 1950, the world only produced 2 million tons, and now production is more than 450 million tons. Around a quarter of plastic waste is thrown away and needs to be appropriately managed, namely around 82 million tons. In other words, the waste is not disposed of in a proper disposal site, not recycled or burned. This research underwent several stages: literature study, data collection, extruder design, machine element calculations, analysis and discussion. Six types of materials will be used as objects for selecting extruder materials, including SS 410, SS 422, AISI 4140, AISI 4340, AISI 1144, and AISI 1045. Planning is carried out on the machine elements so that von Misses stress and deflection values ​​are obtained to determine the appropriate values. Extruder design planning. It was concluded that the highest Von Misses Stress value was obtained for all materials with variations in material length and width, namely 700 and 45 mm. The higher the length and diameter dimensions, the higher the von Misses stress value. The highest deflection value was obtained on Stainless Steel 410 material with variations in length and width of the material, namely 700 and 45 mm. The higher the length dimension of a material, the higher the deflection value.
KAJI EKSPERIMEN PERBAIKAN CACAT RONGGA BENDA CORAN MATERIAL FC 250 MELALUI PROSES PENGELASAN BERBASIS ELEKTRODA NIKEL Hidayat, Reza Yadi; Soetopo, Antonius Adi; Muslim, Dede Buchori; Nahrowi, Muhammad; Khairani, Syifa
Machine : Jurnal Teknik Mesin Vol 10 No 2 (2024): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v10i2.5492

Abstract

Based on the case study in the field, it was found that the casting product had surface defects in the form of cavities and was then repaired using a nickel electrode-based welding method. This repair was carried out to close the cavity defects so that a perfect casting shape was obtained. The material that has been welded has a different hardness from the base material, making it difficult to machining. This study aims to analyze the effect of welding on the ability of gray cast iron material that has been welded in terms of cutting tool wear and chip formation. The sample used was made of gray cast iron with a weld bead on its surface. Welding used a CIN-1 nickel electrode with the SMAW (shielded metal arc welding) welding method. Cutting was carried out using a conventional milling process using an HSS dovetail cutter. Observations were made through hardness testing on the base material, PMZ (partially melted zone), and weld metal which was continued with microstructure testing, wear measurement and chips formed. Based on the results of observations of FC 250 material that was welded on the base material, the microstructure formed was pearlite with graphite in the form of thin and long flakes. The microstructure in PMZ is formed by martensite and carbide, while the microstructure in weld metal consists of an austenite matrix with even distribution of graphite particles. The microstructure formed affects the hardness value of the material. From the observation, the hardness between weld metal and base material is not much different, namely 219 HV and 224 HV. The hardness in PMZ is 385 HV.
PENGUJIAN CUTTER ENDMILL HSS DIAMETER 12 MM DENGAN PEMOTONGAN DEPT OF CUT TERHADAP BAJA AMUTIT DI MESIN MILLING LAGUN FU 100 (LFR 25) Adi S., Antonius Adi S Thopo; Diratama, Mohamad Yazid; Daniswara, Wandi
Machine : Jurnal Teknik Mesin Vol 10 No 2 (2024): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v10i2.5607

Abstract

This study aims to analyze the relationship between machining parameters and tool wear (flank wear) in the milling process of amutite steel (SKS3) using a 12 mm diameter High-Speed Steel (HSS) endmill cutter. The machining parameters studied included cutting speed (Vc = 14 m/min and 18 m/min), feed rate (F = 30 mm/min and 75 mm/min), and depth of cut (Doc = 0.5, 1, 1.5, 2 and 2.5 mm). The linear regression method was used to build a mathematical model relating these parameters to tool wear. Experimental data were obtained through a series of machining tests with predetermined parameter variations. The regression analysis results showed that tool wear or flank wear (Vb) was significantly affected by cutting speed (Vc), feed rate (F), and depth of cut (Doc), with constant and exponent values obtained through logarithmic transformation and regression analysis. The regression model obtained has a good level of accuracy in predicting tool wear, although there is a difference between the theoretical and actual Vb values. This discrepancy may be caused by factors not measured in the experiment, such as variations in workpiece material or environmental conditions. This research also provides that the 12 mm diameter HSS endmill cutter is proven to be capable of carrying out the depth-of-cutting process on amutite steel material in the Lagun FU 100 milling machine with the specified depth-of-cut.
SENSORY PREFERENCE DETERMINATION OF GREEN TEA EXTRACTS FROM UNCONTROLLED AND RELAY-CONTROLLED BREWING PROCESSES USING RANK ORDER CENTROID AND SIMPLE ADDITIVE WEIGHTING Pratama, Borneo Satria; Alfiqriyansyah, Alfiqriyansyah; S, Arya Dwicahya; Rukmana, Fitri Hardiyanti; Hartati, Intan Dwi; Cahya Brutu, Henrike Lehla; Winda, Winda; Sariati, Sariati
Machine : Jurnal Teknik Mesin Vol 10 No 2 (2024): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v10i2.5727

Abstract

Green tea extract is a popular beverage known for its health benefits. To increase its market appeal, understanding the sensory profiles—taste, aroma, and color—of green tea extract is essential to ensure customer satisfaction. In this study, experiments were conducted to determine the optimal extraction conditions by varying extraction times (3 or 6 minutes) and temperatures (60°C, 80°C, or 100°C) in two brewing methods: (1) a relay-controlled brewing system utilizing Arduino, and (2) a standard brewing process without automated control. Sensory evaluations were conducted by 30 untrained panelists using a 9-point hedonic scale.. Decision-making methods, Rank Order Centroid (ROC) and Simple Additive Weighting (SAW), were then applied to identify the most preferred product. Results indicated that the highest taste score was achieved by the 80°C-6 min sample, while the best aroma and color scores were observed in the 100°C-3 min sample. Overall, the decision-making process using the combination of ROC and SAW methods concluded that the green tea extract from the 100°C-3 min sample was the most preferred by the panelists.
OPTIMASI PERAWATAN SISTEM PENDINGIN MESIN UTAMA TIPE MITSUBISHI 6UEC52LS PADA KAPAL PADA KAPAL MT. PRINCESS NAOMI Wibowo, Waris; Astriawati, Ningrum; Primagani, Angga
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.3323

Abstract

The purpose of the study is to optimize the cooling system maintenance on the Mitsubishi 6UEC52LS Main Engine on the MT. Princess Naomi belongs to PT. Waruna Nusa Sentana. This research was conducted in the engine room of the MT. Princess Naomi. This research employed qualitative descriptive approach methods. Data collection techniques were obtained through field research by combining observation methods, documentation, in-depth interviews, and a literature review. Data analysis was conducted in triangulation (combination). The results of the study showed that the maintenance of the diesel engine cooling system on the MT. Princess Naomi belongs to PT. Waruna Nusa Sentana has been running optimally with an average after optimization treatment of 83.75%. The cooling system on the main engine of the MT. Princess Naomi applied a closed cooling system. Parts of the cooling system treated include: expansion tank, centrifugal pump, fresh water cooler, sea chest
OPTIMASI KINCIR AIR TIPE UNDERSHOT: PENGARUH JUMLAH SUDU DAN KETINGGIAN MENGGUNAKAN PENDEKATAN EKSPERIMENTAL: Bahasa Indonesia Krishna Sampurno, Carolus Borromeus; Nugroho, Oktavianus Ardhian; Erianda Putri, Regina Chelinia
Machine : Jurnal Teknik Mesin Vol 10 No 1 (2024): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v10i1.3932

Abstract

Electrical energy is the most needed energy today. Electrical energy has become the main thing in all aspects of human life, that's why meeting the needs of electrical energy is very important. The form of energy generation that uses renewable sources is the main thing to look for today. Several types of renewable energy can be used as renewable energy sources such as solar, wind, and water. Water energy is one of the renewable energy sources whose utilization does not have an impact on the surrounding environment. The use of waterwheels is one of the uses of water energy into microhydro power plants (PLTMH). However, not all waterwheels can be used at low heads and large discharges. Of the various types of waterwheels, the undershot waterwheel type has a simple construction, can be used at low heads and small discharges but has low efficiency. This study aimed to determine the best performance from the use of the number of blades, height, and use of the blade shape of the undershot waterwheel. From this study, it is known that the use of a semi-cylindrical blade shape can reduce the drag force of the water behind the blade which can reduce the thrust resulting from the collision of water with the front of the blade. From the study results, it was found that the best performance was achieved using the number of semi-cylindrical blade and the number of 16 blade, which was 2.19 %.
PREDIKSI TITIK LAS BAJA TULANG KING CROSS MENGGUNAKAN METODE TAGUCHI DI PT. XYZ Hadiriyanto, Raden Muhammad Rafi
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.4643

Abstract

Welding is a process of combining materials that produces melting at welding temperature, either by applying pressure or without pressure, and using filler metal or without using it. Before the welding process is carried out, it is necessary to place spot welds which aim to hold the previous position during the welding operation. The spot welding process is carried out by placing small lumps of weld on the welding line. Therefore, this research needs to be carried out to determine the effect of the number of spot welds and predict the weld points on king cross bone steel using the Taguchi method. The Taguchi method is used to arrange an orthogonal array for the layout of the experiment. In this method, the experimental results must first be analyzed for accuracy to meet certain conditions. Based on the results of research using the Taguchi method in predicting weld points, it was found that the main factor that most influences the build up setting of Kingcross is the distance between weld points, the second factor is the number of weld points, and the third factor is the length of the weld points.
EFEK PENAMBAHAN GASKET KEPALA SILINDER DAN VARIASI OKTAN BENSIN TERHADAP PERFORMA MESIN SILINDER TUNGGAL Rahmat, Bahtiar; Wijaya, Mohammad Burhan Rubai; Bahtiar, Fahmy Zuhda; Muttaqin, Katiko Imamul; Wirawan, Yuris Bahadur
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.5277

Abstract

The total motor vehicle sales reflected an increase in people's mobility. Alongside this, the industry were also develop high compression engines to achieve optimal performance. This research aims to examine the effects of adding a cylinder head gasket and variations in the octane number of gasoline used in a single-cylinder internal combustion engine. Dynamometer testing was conducted to observe the differences in torque and power output. The test results indicate that an engine with a compression ratio of 11,8 Kg/cm2, coupled with the use of RON 100 gasoline, produces the highest power output, which is 7.90 kW, with peak torque reaching 9.93 Nm. On the other hand, the smallest torque is generated by the same engine when supplied with RON 92 gasoline, at 4.78 Nm, with the lowest power output of 5.43 kW.
ANALISIS PARAMETER PEMESINAN MESIN CNC LASER DENGAN CONTROLLER ARDUINO UNO PADA BENDA KERJA AKRILIK DENGAN TEBAL 3 MM HT Saragi, Jandri Fan; Dairi Boangmanalu, Eka Putra; Pratama, Angga Bahri; Sahat, Sahat
Machine : Jurnal Teknik Mesin Vol 11 No 1 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jm.v11i1.5585

Abstract

CNC (Computer Numerical Control) machines have revolutionized manufacturing processes and mechanical engineering by replacing manual methods that rely on human labor. A significant innovation in CNC technology is the use of lasers, which are highly beneficial in the engraving industry. CNC Laser machines are used to etch materials like 3 mm thick MDF boards according to predetermined design patterns. The precision level, removal rate, and engraving quality depend on the material properties, laser source characteristics, and laser parameters. The objective of this research is to determine the appropriate machining parameters for 3 mm thick MDF boards and to identify the optimal working time for engraving on this material. The method used in this study is the experimental method. The results of this research show that the feed rate used is 750 mm/min and the laser power is set at 40%, with a processing time of 4 minutes and 42 seconds to complete the engraving of a logo on a 3 mm thick MDF board.

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