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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 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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Journal : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Pengaruh Variasi Putaran Benda Kerja Dan Feeding Menggunakan Metode Pemakanan Tangensial Posisi Up Pada Proses Turn-Milling Terhadap Kekasaran Permukaan Hendro Sulistiono; 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

Surface roughness is a very important factor in the production of the one turn-milling process. Turn-milling is a combined machining process of turning and milling processes with additional tools (cutting) that rotate simultaneously with the rotation of the workpiece. Turn-milling processes are classified in orthogonal turn-milling methods, co-axial turn-milling, tangential turn-milling and each feeding method has an up and down feeding position. The resulting surface quality is also affected by the parameters of the machining process in the form of workpiece rotation and feeding. The purpose of this research is to determine the effect of parameters on surface roughness and to know the optimal parameters of surface roughness by doing tangential process turn-milling position up. By varying the parameter variables, the surface roughness produced in this study is influenced by the rotation of the workpiece and feeding. The slower rotation of the workpiece then the lower the resulting surface roughness value, while the smaller feeding then the smaller the resulting surface roughness value from the tangential turn-milling process with a constant tool rotation at 25,000 rpm. The optimal parameter is the rotation of 400 rpm workpiece with 0.051 mm/rev roughness value of 1.632 μm found on the N7 roughness.Keyword: Turn-milling, Tangential turn-milling, Rotation, Feeding, Surface roughness.
Pengaruh Kecepatan Sliding Vertical Terhadap Hasil Pengelasan Material Karbon Rendah Menggunakan Proses Pengelasan Smaw Sistem Sliding Adaptive Vertical Andreas Prasetyo; 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

Electric arc welding wrapped electrodes or known as SMAW (Shielded Metal Arc Welding) is one of the welding technologies which have several advantages such as large currents that can be varied as a heat source, and easy to use in various welding positions. In order to get good welding, the angle and speed of welding must be concerned. This study uses a sliding adaptive vertical system that varies the welding speed and angle. Observation was done by observing visually and mechanical properties were tested by a tensile test. The material used low steel (mild steel), the seam used V steam with angle 60 ° and the electrode used the E6013 KOBE RB-26 electrode with 3.2 mm diameter. This study used 9 specimens with the lowest tensile strength of 468.11 Mpa and the highest value is 496.53 Mpa. Micro structure is influenced by several factors such as heat input, cooling rate, weld speed, and current strength. In this study the weld metal area has a large grain structure than base metal and HAZ (Heat Affected Zone).Keywords: smaw welding, sliding adaptive vertical, electrode angle, HAZ.
Desain Tongkat Penjepit Multifungsi Menggunakan Metode Fuzzy Analytical Hierarchy Process (FAHP) Rudiansyah Rudiansyah; 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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Abstract

The multi-function of clamping stick serves to pick up items, to replace light bulbs, to catch snakes, to reach objects in the cupboard that are not reachable to the hands and so on. Its multi-purpose can reduce the process of bending and standing and when pick up objects and collecting waste becomes hygienic. In this research the Fuzzy Analytical Hierarchy Process (FAHP) was chosen as a method to determine the optimal design a multi-function clamping stick which based on the questionnaire given to the expert, to choose the best decision alternative. The initial questionnaire was made to prioritize consumer needs, that used for the initial design. The consumer needs's questionnaire was made on several aspects, namely: flexibility, design, material, safety, usebility, function, dimensions and aesthetics. The next step was the selection of optimal designs using Fuzzy AHP, which involves Experts based on product quality indicators i.e. functional, performance, ergonomic, durability, serviceability and esthetical. The highest indicator value was obtained for Waste Clamping stick of "functional" with a value of 0.369 and optimal design choices for "alternative 1". The Light Bulb Clamping stick was obtained the highest indicator of "functional" with a value of 0.369 and the optimal design choice of "alternative 1". The Snake Clamping stick was obtained the highest indicator of "functional" with a value of 0.370 and the optimal design choice of "alternative 2".Keyword: Clamping Stick Design, Fuzzy Analytical Hierarchy Process(FAHP)
Desain Mesin Penghancur (Shredder Machine) Batang Kelapa Sawit Berbasis Metode Design For Manufacture and Assembly (DFMA) Roni Wandra; Yohanes Yohanes; Mustafa Akbar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

DFMA is defined as the design of a product or component which can facilitate the process of manufacturing and assembly process with other components to become a unified product. The utilization of palm oil is only limited to the fruit to produce oil, and to a certain extent the utilization of fiber fruit bunches and fronds to producefiber. Utilization in the form of particle board using oil palm trunk. From basic research on the utilization of oil palm trunk, then it needs tools to process oil palm trunk into raw material that will be processed to be particle board, paper materials and cattle food. There are several steps to design a shredder machinei.e DFMA methods for determining the shredder machine design with easy assembly and manufacture, calculations to determine the motor power is using, and the simulation of structural strength testing using Autodesk Inventor to get the value of the safety factor of the frame and the shaft. The results obtained efficiency values assembly design is 3.14% .Then, the calculation results of the machine element motor power required is 3 Hp at 1400 rpm rotation for oil palm trunk with a surface area of 1 cm x 10 cm. The analysis result of the frame structure and shaft used Autodesk Inventor to obtain the safety factor value of the frame is 6.41 and the shaft is 4.3.Keywords: DFMA, Shredder Machine, Oil Palm Trunk, Safety Factor, Assembly Efficiency.
Perancangan Mesin Pengupas Buah Pinang Berbasiskan Metode Quality Function Deployment (Qfd) Angga Pranata; Yohanes Yohanes; Satriardi Satriardi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Areca peeler machine design is one of the processes to increase productivity. Areca stripping process is generally done manually, ie by spliting and dried until the Areca is actually already dry. Areca peeler machine design is intended to facilitate farmers in processing agricultural products Areca so as to increase production capacity and benefits also increased. Areca peeler machine design using quality function deployment method that aims to get the design that corresponded to the wishes of the community. Customer voice and customer need is obtained from the results of questionnaires. Areca stripping mechanism that is by grinding the areca husks as a result of the round blade, assisted by feeding screw as a conductor of the fruit. Dimensions of Areca peeling machine obtained from anthropometry Indonesia.Keyword : areca, machine parer areca, Quality Function Deployment Method, anthropometric Indonesia
Eksperimental Variasi Perbandingan Putaran Mata Pisau Pengantar Terhadap Hasil Pengupasan Mesin Pengupas Sabut Kelapa Angga Septiawan; Yohanes Yohanes
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

In the handling of agricultural products, peeling and cutting are a job that has always been done since harvesting until the product is ready to be consumed or processed further.The simple peeling and cutting jobs can be completed manually using a knife or other cutting tool. However, if the amount of peeling coconuts at harvest is large in numbers, manually requires considerable time and labor. Currently design a coconut peeling machine using screw feeding system, which equipped a peeling knife and spike roller. This research proposed to improve the machine performance designed with investigated the variation of peeler blade rotation. The method used in this research was an experimental testing by varying the rotation of the peeler blade (peeling knife and spike roller) and two rollers for forced rotation. Then, the coconut peeling results (coconut husking) were compared and analyses. After testing the rotation of variation of peeling blade and companion blade of coconut peeling machine, that was resulted good husk for 3 of 8 of coconut stripping, which rotation of peeling blade and companion blade of 20 rpm and 15 rpm respectively. These peeling results became better for 3 coconuts due to distance two roller of peeling knifes that whas set up on 175 mm.Keywords: Coconut peeling machine, Blade, Round Variation, Peeling result.
Desain Alat Uji Impak Struktur Las Gesek Bar-Plate Menggunakan Bantuan Computer Aided Engineering (CAE) Jery Indra Putra Harianja; Yohanes Yohanes; Muftil Badri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Friction Welding is one of the well known press welding methods, where the method is joining two pieces of metal materials. By in this method the heat resulted from the change in mechanical energy into thermal energy in the field of interface the workpiece due to friction during motion plays under pressure/friction. Rotaryfriction welding is made from bar-plate specimens and its products tested by tensile test but not optimal because the weld test objects attached again by adding one bar on the other side, so that acquired way of knowing the characteristics of friction welding the connection using the impact test, so it required the design and manufacture of tools the impact test that aims to get the construction design and the impact tester of friction welding structure of bar-plate. Construction design includes chassis, axle, fixture, and a disc Binder then simulated using ANSYS to view voltage that occurs in the design does exceed the allowed voltage. The component designer is simulated order and the fixture result States that voltage happens during testing does not exceed the allowed limits, it is stated that decent design is created. Impact tester created then tested, and the results stated that no failure occurred on the tools in the form of a broken or cracked, so the impact tester that are worth to be used.Key words: Friction Welding, Bar-plate, Design, Impact Tester, ANSYS
Desain Dan Penentuan Lokasi Pembebanan Pendulum Alat Uji Impak Untuk Pengujian Produk Hasil Las Gesek Rotary Bar-Plate Panji Adino; Yohanes Yohanes; Muftil Badri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Fracture that occurred in bar-plate friction welding joint on component, be it with a similar or dissimilar materials, can be reviewed by destructive testing. One of the destructive test on weld joint by friction welding is the impact test. Pendulum of standart Charpy and Izod is not match to use for it. Therefore, in this study was made the design and set up pendulum of impact testing for it, using the finite element method software, by considering dynamic factors that may affect fracture such as, loading angle, loading point on the product bar-plate, the dimensions of pendulum, maximum stess thet occurs, and the mass variation of the pendulum. The Obtain summaries are as follows: (1) Results of the Pendulum tests, it was safe to use, it was qualyfied for pendulum impact testing, and plastic deformation was not occurs on entire pendulum. (2) Based on tests result, loading point (x) at 10mm, affected fracture between bar and plate in HAZ section, while loading point at 40 mm until 15 mm affected fracture on plate, not on the section between bar and plate.Keywords: Bar-plate friction welding, Loading point.
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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Abstract

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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Abstract

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
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 Budi Rukhyana Darius Andana Haris Derik Oktarian Devid Vio Sandri Didi Syamsunarto Djoko Widodo Evon Yulianto Fajar Pratama Putra Frandi Barasa Gede Sukadarmika 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