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All Journal TEKNIK Jurnal Ilmu Dasar Jurnal Simetris Jurnal Pengembangan Pendidikan Jurnal Teknosains Jurnal Teknologi SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Rekayasa Mesin Sinergi REKAYASA ROTOR: JURNAL ILMIAH TEKNIK MESIN Jurnal Litbang Industri EMITTER International Journal of Engineering Technology Journal of Mechanical Engineering Science and Technology Panrita Abdi - Jurnal Pengabdian pada Masyarakat Journal of Energy, Mechanical, Material and Manufacturing Engineering STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Jurnal POLIMESIN Multitek Indonesia : Jurnal Ilmiah Jurnal Elemen Jurnal Riset Teknologi Industri J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin JURMA : Jurnal Program Mahasiswa Kreatif Jurnal Abdi Masyarakat Indonesia Jurnal Litbang Industri
Mahros Darsin
Jurusan Teknik Mesin Fakultas Teknik Universitas Jember
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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PEMBUATAN ALAT PERAGA MOTOR BAKAR 4-LANGKAH UNTUK MENDUKUNG PEMBELAJARAN SISTEM KBK Darsin, Mahros
Jurnal Pengembangan Pendidikan Vol 3, No 1 (2006)
Publisher : Jurnal Pengembangan Pendidikan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (601.301 KB)

Abstract

Abstract. In implementing competence based curriculum it needssupport of resources, one of them is laboratory equipment. Mechanicalengineering students should understand how the engine run, what its componentsand how is ignition work. Theoretical study could not make them fullyunderstood, whereas to mount and dismount an engine block is time consuming andcostly.  The moderate way to understandthem is by observing a model of gasoline engine. The project aim is to designand to manufacture a used 4-stroke block engine motorcycle being a model.Design considerate that the model should able to show how is an engine works,how the work of ignition, and what are components of transmission.Manufacturing consideration is that the engine block should not machine thebearing and supporting posts. Manufacturing of engine block was carried out atmachining laboratory by an-5mm end mill. Assembling the component to themachined block shows that the model can fulfill the requirements. Keywords:  model, 4-strokes gasoline engine
ANALISIS SIFAT MEKANIK HASIL PENGELASAN ALUMINIUM AA 1100 DENGAN METODE FRICTION STIR WELDING (FSW) Sumarji, Sumarji; Sudrajat, Angger; Darsin, Mahros
ROTOR Vol 5, No 1 (2012)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (603.174 KB)

Abstract

Aluminum and aluminum alloys have properties that are less well when coMPared to steel, such as specific heat and has a high conductivity. They are also easily oxidized and form an aluminum oxide Al2O3 which have a high melting point. Consequently, when they are welded the fusion between base and weld metal will be blocked. Moreover, if the cooling process is too fast it will form a smooth cavity ex-pouch of hydrogen. Friction stir welding (FSW) is a challenging alternative for joining aluminum alloy. In FSW, process occur in the solid state (solid state joining). In this research, some attempts were carried out to find the best quality of welding, in term of mechanical properties and microstructure. Tool rotation speed was varied at 780, 980, 1120 rpm. Whereas, feed rate used was keep constantly at 15 mm/min. The material to be welded is a- 4.0 mm thick aluminum AA 1100 strips. Result showed that the highest strength obtained is 56.528 MPa at 1120 rpm and the lowest strength obtained is 38.472 MPa at 980 rpm. Wormholes and the lack of penetration defects are the main things that reduce the tensile strength. From micro observations known on the grains shape of the stir zone, FeAl3 particles is spread more evenly in matrix of Al  due to the stir process during the welding process. Hardness tests showed that the weld metal is softer than the base metal. Keywords: Aluminum, welding, FSW
SIFAT MEKANIK DAN CACAT PENYUSUTAN (SHRINKAGE) AKIBAT VARIASI KOMPOSISI CAMPURAN DAUR ULANG POLYETHYLENE PADA INJECTION MOULDING Badri, Muhammad Ghilman; Darsin, Mahros; Dwilaksana, Dedi
ROTOR Vol 7, No 1 (2014)
Publisher : ROTOR

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Abstract

Injection moulding is one process to form plastic by compress the melted plastic in a closed die. The raw material for the process either pure plastic pellet or mixed with recycled plastics. this research focused on finding the acceptable percentage of recycled  the raw material in term of tensile strengh and shrinkage. The composition is varied from 0% to 100% of polyethylene. Tensile test shows that the more percentage of recycled the lower is the  tensile strenght. on the other hand, the more the recycled composition the highernis shrinkage number. Both decrease of tensile strengh and increase of shrinkage are linearly. Recycled plastic in the raw material makes the composition be not uniform. It leads misrun defect, i.e. the melted plastic solidified before it reach the destined cavity in the mold. Moreover, it also creates more void in the parts. The highest tensile strength of 19.10 N/mm2 when no recycled mixed in, whereas the minimum of 12.05 N/mm2 achieved when 100% recycled was applied. Recycled Composition of 100% also increased by 9,82% compare to pure plastic. Keywords: Recycled plastic, tensile strength, shrinkage.
Analisis Kekuatan Tarik dan Kekasaran Kawat Tembaga Hasil Drawing akibat Variasi Persentase Reduksi Firman, Mohammad; Darsin, Mahros; Arbiantara, Hari
ROTOR Vol 6, No 1 (2013)
Publisher : ROTOR

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Abstract

Wire drawing is cold working process to reduce the cross-sectional area. The value of reduction is different in every process, depend on the needs and working parameters. The degree of reduction causes differences of copper wire rod in the characteristics and quality, such as its tensile strength and roughness. The purpose of this research is to determine the influence degree of reduction to the tensile strength and roughness of copper wire. The research method is comparing the tensile strength and roughness of copper wires control with drawed copper wires, without repetition stage. The speciments used in this research are pure copper rods (99.9%) with 3.1 mm, 3.2 mm and 3.25 mm in diameter and 2.8 mm of die output, so will get the degree of reductions are 19%, 23% and 26%. The results of this research was the wire drawing process increase the tensile strength of copper rods from 86.87 MPa to 100.74 MPa on 19% reduction. On 23% reduction the tensile strength increase from 82.24 MPa to 105.62 MPa. The greatest increase of tensile strength was result by 26% reduction, it was from 86.87 MPa to 115.36 MPa With the more of degree of reduction on the drawing process led the increase of tensile strength will be greater. This research also obtained the result that the wire drawing process result the decrease roughness of copper rods from 0,144 μm to 0,089 μm on 19% reduction, from 0.146 μm to 0.087 μm on 23% reduction and the copper rod roughness decrease from 0.159 μm to 0.083 μm on 26% reduction. The increase of degree of reduction produce insignificantly result of surface roughness changing. Keywords: Roughness, Tensile Strength, Wire Drawing, Reduction, Copper
PENGARUH PROSES PENGADUKAN TERHADAP KARAKTER ADONAN DAN SIFAT BIODEGRADABLE PLASTIC YANG DIBUAT DARI BUNGKIL BIJI JARAK PAGAR Arbiantara, Hari; Darsin, Mahros; Lindriati, Triana
ROTOR Vol 6, No 1 (2013)
Publisher : ROTOR

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Abstract

Manufacture of biodegradable plastics in this study begins with making the dough using a single screw extruder, then the dough is molded by using a compression molding machine. The basic material used is a mixture of jatropha seed meal, corn starch, CMC (composition 7: 2: 1). This study aimed to study the effect of Helic corner and screw compression ratio of the batter character and biodegradable plastic produced. Helic screw angle was varied from 2,5o; 5o; 7.5 ° and screw compression ratio varied from 1.5; 2.5; 3.5. The results showed an increase in the angle of screw Helic simplify the process of molding (lowering the value of Tg, Tm, ΔH and texture of the dough) and to improve the mechanical physical properties of the biodegradable plastic produced (tensile strength, strain increases while the thickness and Water Vapor transmition rate decreases). Improved compression ratio increase and decrease the thermal properties of dough texture and increase the tensile strength and strain, decrease the thickness and Water Vapor transmition rate of biodegradable plastic produced. Keyword: biodegradable plastic, mold, helical degree, compression ratio
Forces Perspective of Drillability of Titanium Alloy 6Al-2Sn-4Zr-6Mo Darsin, Mahros; Pasang, Timotius; Chen, Zhan
Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 3, No 1 (2018)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (455.345 KB) | DOI: 10.22219/jemmme.v3i1.5825

Abstract

This paper concerns on drillability of Ti-6Al-2Sn-4Zr-6Mo (Ti-6246) from the point view of thrust force (Fz) & torque (Mz) using a TiAlN CVD coated carbide tool. The condition of the material was varied with three different heat treatments. Whereas, the machining parameters were varied in cutting speed, feed rate and cooling application method. Taguchi method L-18 was employed to design the experiments. Both type of forces, thrust force and torque, were measured using a Kistler dynamometer, and the data were analyzed using a Minitab 17 software. The thrust force was influenced by the cutting speed 24%, depth of drilling 21%, heat treatment 13%, and feed rate 11%. The torque was influenced predominantly by feed rate up to 94%. Coolant application has no effect on reducing both thrust force as well as torque.
OPTIMASI VARIASI DIAMETER NOZZLE, TEKANAN UDARA, DAN SUHU PENGERINGAN PADA PELAPISAN BAJA St37 MENGGUNAKAN METODE RESPONSE SURFACE Hutama, Tri Surya; Darsin, Mahros; Mulyadi, Santoso
Simetris: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Vol 10, No 2 (2019): JURNAL SIMETRIS VOLUME 10 NO 2 TAHUN 2019
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1333.676 KB) | DOI: 10.24176/simet.v10i2.3490

Abstract

Pengecatan adalah proses pelapisan yang diterapkan pada permukaan suatu benda. Tujuan dari pengecatan ada dua, yaitu protektif dan dekoratif. Dari segi protektif cat dapat dinilai dari ketebalan dan jika  dari  dekoratif  cat  dapat  dilihat  dari  segi  kekilapan.  Tujuan  dari  penelitian  ini  adalah  untuk mengetahui pengaruh dari kombinasi parameter yang dapat menghasilkan ketebalan yang maksimum. Desain eksperimen yang digunakan adalah Response Surface Method (Box-Behnken design), 15 eksperimen dengan masing-masing 3 kali pengulangan.  Kombinasi parameter dan level yang digunakan yaitu diameter nozzle (1.2mm, 1.3mm, dan 1.4mm), tekanan udara (2bar, 3bar, dan 4bar), dan suhu pengeringan  (65oC,  70oC,  75oC).  Metode  pengecatan  menggunakan  spray  painting  dengan  3  kali pelapisan dengan jarak 15cm. Setelah melalui proses pengeringan spesimen diuji menggunakan alat ukur thickness  gauge  yang  memiliki  sepsifikasi  rentang  pengukuran  0-1250µm/0-50mil  dengan  akurasi±2.5µm. Data hasil pengukuran ketebalan diolah menggunakan software Minitab 18 dan  didapatkan persamaan order kedua hubungan antara ketebalan dan parameter pengecatan dinyatakan sebagai ?k =105.61 ? 2.522 X1 - 7,616 X2- 7,744 X3- 2,9 X12- 1,82 X22- 3,91 X32 + 1,94 X1 X2   + 1,64 X1 X3 - 3,66 X2X3; dengan X1, X2  dan X3  merujuk ke parameter diameter nozzle, tekanan penyemprotan dan suhu pengeringan. Faktor yang berpengaruh dari ketiga variasi adalah suhu pengeringan dengan nilai koefisiensquare sebesar 3.91, p-value ?1(0.000) dan p-value ?2 (0.018). Dari penggunaan Response Surface Method (Box-Behnken design) didapatkan hasil ketebalan yang maksimum yaitu 112,472?m dengan kombinasi parameter diameter nozzle 1,25mm, tekanan 2bar dan suhu pengeringan 67,32 ?.
PEMBUATAN ALAT PERAGA MOTOR BAKAR 4-LANGKAH UNTUK MENDUKUNG PEMBELAJARAN SISTEM KBK Darsin, Mahros
Jurnal Pengembangan Pendidikan Vol 3 No 1 (2006)
Publisher : Jurnal Pengembangan Pendidikan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstract. In implementing competence based curriculum it needssupport of resources, one of them is laboratory equipment. Mechanicalengineering students should understand how the engine run, what its componentsand how is ignition work. Theoretical study could not make them fullyunderstood, whereas to mount and dismount an engine block is time consuming andcostly.  The moderate way to understandthem is by observing a model of gasoline engine. The project aim is to designand to manufacture a used 4-stroke block engine motorcycle being a model.Design considerate that the model should able to show how is an engine works,how the work of ignition, and what are components of transmission.Manufacturing consideration is that the engine block should not machine thebearing and supporting posts. Manufacturing of engine block was carried out atmachining laboratory by an-5mm end mill. Assembling the component to themachined block shows that the model can fulfill the requirements. Keywords:  model, 4-strokes gasoline engine
Rancang Bangun dan Uji Performa Sistem Kendali Pemberian Fluida Permesinan MQL Berbasis Arduino Dinata, Gerry Gardika Surya; Muttaqin, Aris Zainul; Darsin, Mahros
Jurnal Rekayasa Mesin Vol 11, No 1 (2020)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2020.011.01.11

Abstract

In machining  excessive use of cutting fluid can have a negative impact to the  enviroment. An alternative to overcome this problem is by using the minimum quantity lubrication method (MQL). In MQL method the cutting fluid is flowed by compressed  air. This research aim to design and implement an Arduino-based controller for further minimize the use of cutting fluid in MQL system. It was programmed that the pump would only work when the tool temperature beyond 70 oC and vice versa. Observation shows that the controller work accordingly. Other experiments were carried out to check the fluid consumption with Taguchi method. It was proof that applying the controller was able to reduce the fluid consumption.
Pengaruh Metode Minimum Quantity Lubrication (MQL) Terhadap Nilai Kekasaran Permukaan Nugraha, Dicky Aprilian; Qoryah, Rika Dwi Hidayatul; Darsin, Mahros
Rekayasa Vol 13, No 2: August 2020
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (849.2 KB) | DOI: 10.21107/rekayasa.v13i2.6259

Abstract

Sebuah alat kendali semprotan cutting fluid pada minimum quantity lubrication (MQL) telah berhasil dibuat. Alat yang bekerja dengan sistem Arduino ini dihubungkan dengan sensor suhu yang diletakkan pada sisi pahat dan berhasil mengendalikan kapan cutting fluid harus disemprotkan dan kapan harus berhenti. Tujuan dari penelitian ini adalah untuk mempelajari efek penggunaan alat kendali ini terhadap kekasaran permukaan pada pembubutan baja AISI 4340. Metode Taguchi L9 digunakan untuk menyusun desain eksperimen dengan variasi parameter: metode pemberian cutting fluid, kedalaman permukaan dan komposisi campuran cutting fluid. Pahat sisipan berbahan karbida digunakan untuk memesin lurus dan roughness tester digunakan untuk mengukur kekesaran permukaan hasil pembubutan. Analisis S/N ratio dilanjutkan dengan analisis varians (ANAVA) membuktikan bahwa metode MQL yang dilengkapi sistem kendali ini mampu menghasilkan rata-rata permukaan paling halus dibandingkan metode lain. Nilai kekasaran optimum sebesar 1,941 µm diperoleh pada kombinasi permesinan dengan MQL dengan sistem kendali, depth of cut 2,0 mm, dan komposisi air terhadap minyak pada cutting fluid 7:3Effect of Minimum Quantity Lubrication (MQL) Method on Surface RoughnessA device to control the spraying of cutting fluid in minimum quantity lubrication (MQL) has been initiated. This device was programmed with Ardunio and connected to a thermal sensor which is stick on the flank face of the tool. It succeeded in controlling when the cutting fluid should be sprayed and stopped. This research aim is to investigate the effect of using this device to the machined surface roughness. The Taguchi method L9 was used for designing the experiments. Variations were made on the method of applying cutting flood, depth of cut, and cutting fluid composition. Carbide insert tools were used and roughness tester was employed to measure the machined surface roughness. Analysis of S/N ratio following with analysis of variance (ANOVA) revealed that the controlled MQL cooling application results in the minimum surface roughness. The optimum surface roughness would be achieved when using MQL with temperature controller, depth of cut of 2.0 mm, and composition between water and oil for cutting fluid of 7:3.
Co-Authors Agil Widhy Azizi Agus Triono Ahmad Adib Rosyadi Ahmad Iqbal Fawaid Ahmad Syuhri Alfi Hasan Andi Sanata Angger Sudrajat Angger Sudrajat, Angger Antonius Cahya P Aris Zainul Muttaqin Bambang Irawan Boy Arief Fachri Cahya Alief Prasetyo Cahya Alief Prasetyo Chen, Zhan Danang Yudistiro Danny Febriansyah Dedi Dwilaksana Deny Tomy Andrianto Digdo Listyadi, Digdo Dinata, Gerry Gardika Surya Doddy Parningotan Doohan Taqdissillah Dwi Djumhariyanto Faradin Adyatama Fatkhur Rohman Firman Gustiawan Gaguk Jatisukamto Hadi Samsul Halmi Palwa Guna Hari Arbiantara Hari Arbiantara Basuki Hari Arbiantara, Hari Hayun Indra Nur Iman Hutama, Tri Surya Imam Rudi Sugara Indra Surya Iwanata Intan Hardiatama Intan Hardiatama Joni Anggianto Khamdan Khavivi Kusno Kusno Laily Ilman Widuri Luviandy, Allen Miftakhul Rohman Mochamad Asrofi Mochamad Edoward Ramadhan Mochamad Edoward Ramadhan Mochammad Edoward Ramadhan Mohammad Firman Mohammad Firman, Mohammad Muh Nurkoyim Kustanto Muhammad Dimyati Nashrullah Muhammad Fadhlurrohman Faqih Muhammad Ghilman Badri Muhammad Ghilman Badri, Muhammad Ghilman Muhammad Sholihul Amin Muhammad Trfiananto Nasrul Ilminnafik Naufal Fardio Albajili Nugraha, Dicky Aprilian Pasang, Timotius Pieter Muhammad Iko Marrendra Prayogo Alim Pangestu Puranggo Ganjar Widityo R. Puranggo Ganjar Widityo Rahma Rei Sakura Raihaan . Renald Rochman Mauludy Rika Dwi Hidayatul Qoryah Robertoes Koekoeh Koentjoro Wibowo Robertus Sidartawan Sains Ilham Akbar Salahuddin Junus Salman Al Farisi Siregar Santoso Mulyadi Sari, Herninda Ayu Meylinda Soesatijono Soesatijono Soesatijono Soesatijono Sumarji Timotius Pasang TRI HANDOYO Tri Surya Hutama Triana Lindriati wazirotus sakinah Yohan Rizal Kharisma Yuni Hermawan Zhan Chen