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All Journal Jurnal Bisnis dan Ekonomi Majalah Ilmiah Teknologi Elektro ENVIAGRO Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains JIKSI (Jurnal Ilmu Komputer dan Sistem Informasi) JURNAL BISNIS & AKUNTANSI UNSURYA Idea : Jurnal Studi Jepang Jurnal Paradigma Akuntansi Jurnal Projemen UNIPA Majalah Ilmiah Teknologi Elektro
Yohanes Yohanes
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Arts Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Social Sciences Other

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Pengaruh Variasi Sudut Elektroda Dan Kuat Arus Polaritas Terbalik Terhadap Hasil Pengelasan Shielded Metal Arc Welding Sistro Maldini Sihombing; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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This study aims to obtain optimum welding results on low carbon steel with variations in electrode angle and reverse polarity direct current welding current with SMAW welding machine with adaptive sliding system two axis with speed control. Welding is done automatically and the welding speed is adjusted using the Speed Control. The method used is experimental by varying the electrode angle of 45°, 70°, 90° and the welding current strength of 90 A, 100 A, 120 A in order to determine the optimization of the welding results from the SMAW welding machine using a sliding adaptive two axis system with speed control. From the results of tests carried out with reverse polarity, the stressed tensile strength is obtained at an angle of 70° with a current strength of 100 A and for the lowest tensile strength test, namely at a letrode angle of 45° with a current strength of 100 A. Keywords: Sliding Adaptive Two Axis With Speed Control, Direct Current Reverse Polarity, Electrode Angle, Strong Current
Analisa Kekasaran Permukaan Dari Metode Pemotongan Tangensial Pada Proses Pemesinan Turn-Milling Muhammad Iqbal; Yohanes Yohanes; Anita Susilawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The surface roughness of a machining process is a very important factor in the field of production that is one of the turn-milling process. Turn-milling is a combined machining process of turning and milling with complete tools (cutting) where workpieces and tools rotate together. The turn-milling process can be classified in orthogonal turn-milling, tangential turn-milling and co-axial turn-milling. The resulting surface surface quality is also affected by the parameters of the machining process in the form of rotation of the workpiece and the rotation of the tool. The purpose of this research is to know the effect of parameters on surface roughness and optimal Parameter to surface roughness by doing tangential process of turn-milling. By varying the parameter variables, the surface roughness generated in this study is influenced by the rotation of the workpiece and the rotation of the tool. The higher the tool rotation the lower the surface roughness. As well as the rotation of the workpiece the higher the rotation of the workpiece the finer the surface results. The optimal parameter is a rotation tool -2500 rpm with a rotation of 1000 rpm objects found in the roughness class N6 with a roughness value of 1.282 μm where the roughness value is lower than the other roughness values.Keywords: Turn-Milling, Tangential Turn-Milling, Rotation, Surface Roughnees
Sistem Pengukuran Daya Mekanik Penggerak Rotary Friction Welding Menggunakan Sensor Strain Gauge Pada Iron Holder Belt Hambra Hidayatullah; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Rotary friction welding is a type of welding that belongs to the solis state type where welding does not require filling material to perform welding. This study aimed to measure the mechanical power of the rotary friction welding machine drive engine, before welding, during welding, and after welding using a strain gauge sensor attached to the stretch rod, for motor speed measured using an optocoupler sensor, the measurement process. This mechanical power included the design process, design, calibration settings, and testing of stretch rods. The stretch rod was installed as a substitute for the iron holder belt with the dimensions of the stretch rod 200 mm x 30 mm x 25 mm, for the thickness of the stretch rod where the strain gauge sensor is attached was 5 mm. The sensor used for reading the magnitude of the stretch on the stretch rod was the 120 ohm strain gauge, the speed read on the optocoupler was directly proportional to the amount of strain read on the strain gauge. In the welding process, a pressure of 2 bar to 4 bar is applied which will result in heat on the objects that rub against the object until it reaches the forging temperature of the object and a pressure of 6 bar is given as the forging pressure for weldingthe amount of mechanical power will be obtained by converting the torque, strain, and engine speed data obtained. Keywords: Friction Welding, Mechanical Power, Strain Gauge Sensor.
Penyelidikan Kekuatan Tekan Dan Laju Keausan Komposit Dengan Filler Palm Slag Sebagai Bahan Penyusun Kanvas Rem Sepeda Motor Jon Prisno Riduan; Muftil Badri; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Palm slag as waste burning of palm shells and bunches for boiler fuel is available in abundance. Availability of abundant is potential to be developed as a filler of brake composite. The using of palm slag as filler composite non-asbestos brake pads have been studied and potential to be used as a substitute for asbestos brake pads motorcycle. The purpose of this study was to determine the effect of variations in the initial compacting pressure and sintering temperature on the compressive strength and the wear rate of the composite. In this study the manufacture of composite brake using materials with a composition of 40% palm slag, 20% steel powder, 20% phenolic resin, 10% alumina, and 10% graphite. Manufacture of composites using powder metallurgy techniques by varying the compaction pressure at 254, 508, and 762 MPa, and sintering temperatures of 150, 160, and 170oC. Increasing compaction pressure and sintering temperature does not always affect the compressive strength and the wear rate of composite brake. Initial compaction pressure affecting the increase in compressive strength is 508 MPa at 150 and 160oC sintering temperature. Initial compaction pressure affecting decrease the wear rate is 254 and 508 MPa at sintering temperatures of 150 and 160oC.Keywords: palm slag, compacting pressure, sintering temperature, compressive strength, wear rate
Pengaruh Polaritas Arus Dan Kecepatan Pengelasan Menggunakan Sistem Sliding Adaptive Vertical Pada Pengelasan Smaw Terhadap Hasil Pengelasan Alfadeny Anjer Farino; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

SMAW (Shield Metal Arc Welding) is one of the commonly used welding technology because it has an excess of which easy to use at any thickness, easy to use with all the welding position and the flow can be varied. In this research,a welding machine of SMAW used Adaptive Vertical Sliding System, so that the welding speed can be arranged constant. This research used a variation of the DC flow (reverse polarity and straight polarity) and the speed of welding based on the welding results by conducting of visual testing, penetrant testing, tensile testing and metalografi testing. The welding speed was controlled using the arduino uno,which linked to motor stepper as the Activator. The Materials used was low carbon steel (mild steel), the groove was used a single v groove of 60 ° and an electrode of E6013. There were 18 specimens to be tested, which 9 of specimens using the straight polarity and 9 of specimens using the reverse polarity. The highest tensile strength of whole specimens occur on straight polarity specimens of 490.95 MPa and the lowest tensile strength specimens occur in the reverse polarity of 283.47 MPa. The micro structure was determined by many factors such as heat input, flow, the speed of the welding, and the rate of cooling. In this research HAZ areas has a larger grain structure than base metal and weld metal.Keywords: Welding, Tensile Testing, Penetrant Testing, Metalografi, HAZ
Kaji Eksperimental Pengaruh Subtitusi Etanol Pada Biosolar B20 Terhadap Kinerja Mesin Diesel Teddi Febriardi Mulia; Romy Romy; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The scarcity of fuel has led to research is done to develop and utilize renewable fuel sources such as ethanol. The purpose of this study was to obtain and compare the performance of a Diesel Engine using B20 biosolar fuel and a Biosolar-Ethanol mixture. The alcohol compound used was 96% ethanol and mixed according to the different composition. The performance characteristics are carried out by testing diesel engines at a constant speed of 2100 rpm and load varied from 350 W, 700 W, 1000 W, 1350 W, 1700 W, 2000 W, 2350 W, 2700 W, and 3000 W. From the experimental results, the performance of diesel engines with ethanol substitute fuel has not changed in power, torque, and bmep. The thermal efficiency of biodiesel was 18.23% and the thermal efficiency of the 5% ethanol mixture was 15.74%, in the mixture of 10% by 16.90%, in the mixture of 15% at 20.16% and in the mixture of 20% by 20.11%.Keywords: Ethanol, biosolar, diesel engine, performance
Eksperimental Kecepatan Elektroda Las Busur Listrik Menggunakan Sliding Adaptive Two Axis Pada Sambungan Mild Steel ASTM A36 Radinal Fernandes; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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This study aims to determine the ideal welding speed in Shield Metal Arc Welding with 1G position on ASTM A36 mild steel welding using a Sliding adaptive Two Axis With Speed Control system. Welding is done automatically and the welding speed is adjusted using the Speed Control. For each welding process, the welding speed can be adjusted according to the welding conditions, such as to a different current or polarity. The output of the Sliding Adaptive Two Axis With Speed Control system is in the form of speed data in mm / s stored in data log. The results of welding are carried out three tests, namely the Visual Test, Penetrant Test, and Tensile Test, the test is carried out to determine which specimen is the best. Experiments were carried out using an Esab AWS E6013 electrode with a diameter of 3.2 mm and using an AC (Alternating Current) with three variations of current strength. From the results of experiments carried out at a current strength of 90 A, the ideal welding speed is 2.88 mm / s with a tensile strength value of 434.00 MPa, for a current strength of 105 A it is obtained 3.56 mm / s with a tensile strength value of 434.0 MPa and for a current strength of 120 A obtained an ideal welding speed of 4.23 mm / s with a tensile strength value of 487.65 MPa. Keywords: Sliding adaptive Two Axis With Speed Control, alternating current, data log, 1G
Studi Eksperimental Pengaruh Penambahan Flywheel Pada Sistem Penggerak Mesin Las Gesek Rotari Terhadap Hasil Pengelasan Material Mild Steel Dengan Stainless Steel 201 Devid Vio Sandri; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Friction welding including solid state welding type, Which the welding process is done in solid phase. Based on observation and research, The biggest cause of damage to the motor is overheating. To minimize overheating on the electric motor needs to be in added flywheel. The purpose of this research is to know the effect of adding flywheel to welding result and to know the optimal flywheel of three variations flywheel used with the diameter of 250 mm and thickness of 10 mm, 20 mm and 30 mm. Tests were performed on stainless steel type 201 material. To calculate ultimate tensile strength on the rotary swipe weld joint To calculate the ultimate tensile strength of the friction welding connection, a tensile test using Universal Testing Machine. Tests on welding specimens with three variations of flywheel obtained the highest average maximum tensile strength value using flywheel 3 with a value of 438.12 Mpa and the lowest average maximum tensile strength value was obtained on the welding specimens using flywheel 1 with a value of 418.12 Mpa. Flywheel 3 with a mass of 11.017 kg has better shock load holding capability than flywheel 1 with mass 3,8836 kg and flywheel 2 with mass of 7,4502 kg.Keywords : Friction Welding, Flywheel, Tensile Test.
Modifikasi Turn-Milling Dengan Motor Servo Sebagai Penggerak Rotary Tools Pepi Setya Bakti; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Turn-milling is a machining method with a system of merging turning and milling operations, where work-pieces and cutting tool perform rotary motion synchronously to optimize the disposal process of chip materials. Development of turn-milling can be done on the lathe and milling conventional machining. The purpose of this study is to modify a conventional lathe with a stationary cutting tool and use a single cutting edge into a rotary tool using 4 (four) cutting sides (multy point cutting). In the manufacture and installation of rotary tool on conventional lathes, tools are made portable and can work on tangential, orthogonal and co-axial turn-milling systems. For the orthogonal and co-axial operating system of the turn-milling are divided into up and down operating systems. In this research the phenomenon of material disposal process of the work-piece surface was investigated. In the process of turn-milling test, the chip was removed automatically as the turn of the cutting edge of the endmill cutting tool. By using a servo motor as one of the rotating tools, it is expected that it will be able to perform the feed without any rotation of the force on the tools.Keywords : Conventional lathe, Rotary tool, Turn-milling.
Pengaruh Pemotongan Co-Axial Pada Proses Pemesinan Turn-Milling Terhadap Kekasaran Material Aluminium 6061 Fajar Pratama Putra; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Turn and milling processes in machining can be referred as turn-milling processes, where working tool and cutting tool works simultaneously. So in this cutting proces, the chip is produced by a cutting tool that is tangent on the bottom part. The main factor in the machining process is the result of surface roughness. The method of this research is using co-axial turn-milling by applying variations to the rotational speed of the tool and the speed of rotation of the workpiece, so the surface quality produced influences by the parameters of the machining process in the form of tool rotation speed and workpiece rotation speed. The purpose of this research is to find out the surface roughness value and to determine the effect of tool rotation speed and workpiece rotation speed on the surface roughness value of aluminum 6061. In result, the higher the rotational speed of the tool and the speed of rotation of the workpiece, the roughness value on the 6061 aluminum workpiece will be smaller. Based on the roughness class, the parameter of tool rotation speed is 2500 rpm with the workpiece rotation speed of 800 rpm is the best parameter in this study with a roughness value of 0.862 µm. Keyword : Turn-milling, Co-axial, Tool rotation speed, Workpiece, Surface roughness.
Co-Authors Achmad Noerkhaerin Putra Aguswandi Aguswandi Alfadeny Anjer Farino Ambri Ambri Anak Agung Gede Sugianthara Andika Saputra Andreas Prasetyo Angga Pranata Angga Septiawan Anita Susilawati Arief Rachman Widyanto Aryo Sasmita Augustpaosa Nariman Augustpaosa Nariman Budi Rukhyana Darius Andana Haris Derik Oktarian Devid Vio Sandri Didi Syamsunarto Djoko Widodo Evon Yulianto Fajar Pratama Putra Frandi Barasa Gede Sukadarmika Gusmardani Jefryanto Halal Putra Purba Hambra Hidayatullah Handri Gustiar Helen Susanti Helmi Candra Hendinto Simanihuruk Hendro Sulistiono Ichsan Rahmadani Syawal Imanuel Wellem Irvan Gunawan Jeanny Pragantha Jery Indra Putra Harianja Jon Prisno Riduan Kartika Andi Kentris Indarti Linawati Linawati Muftil Badri Muhammad Nafis Muhammad Ryan Detra Mustafa Akbar Panji Adino Pepi Setya Bakti Pindo Evans Manuel Damanik Radinal Fernandes Ridwan Abdurrahman Romy Romy Roni Wandra Rudiansyah Rudiansyah Satriadi Satriadi Satriardi Satriardi Sistro Maldini Sihombing Tazkiyah Ahcmad Teddi Febriardi Mulia Tri Lestari Uberkis Uberkis Wenny Wenny Windodo Suwanda Yuhelson Yuhelson Zainal Abdi