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INDONESIA
Jurnal Teknik Mesin Indonesia
Published by Badan Kerja Sama Teknik Mesin
ISSN : 1907350X     EISSN : 25977563     DOI : -
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknik Mesin Indonesia “JTMI” " adalah jurnal ilmiah sains dan teknologi yang diterbitkan oleh Badan Kerjasama Teknik Mesin Indonesia. JTMI meliputi bidang konversi energi, material, desain mekanikal, manufaktur dan otomasi
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 291 Documents
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Analisa keausan pahat pada pemesinan bor magnesium AZ31 menggunakan metode taguchi Gusri Akhyar Ibrahim; Joni Iskandar; Arinal Hamni; Sri Maria Puji Lestari
Jurnal Teknik Mesin Indonesia Vol 12 No 1 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (583.68 KB) | DOI: 10.36289/jtmi.v12i1.69

Abstract

hisel rotating on a workpiece. During the machinery process happenedinteraction between the eye drill with a workpiece where work truncatedwhile a jackhammer experienced friction. Friction experienced a chiselcoming from the surface upset that flows and the surface of a workpiece thathas been lopped off, due to friction this chisel had worn out. The purpose ofthis research will analyzes age use a chisel hss in pemesinan drill magnesiumaz31 and to support the survey used method of taguchi to analyze pembahsanthe results of the study. Machinery parameter a drill that is used namely ajackhammer hss ( hight speed steel with size ( 10 mm, 12 mm, and 14 mm ),the pace lap ( 635 rpm, 970 rpm, 1420 rpm ) and used motion a meal ( 0.10mm / rev, 0.18 mm / rev and 0.24 mm / rev ), with a depth cut 50 mm. thedata wear a chisel carried out using a microscope digital usb with event 50x.Data wear chisel seen every time one drilling process and machinery processwill be stopped if a drill bit has made out. The results showed that chiselhighest age profits to drill diameter 10 mm and the pace lap 635 rpm anduse motion eat 0,10 mm / rev which was during 12,74 minutes, while agechisel lowest diameter drill obtained at 14 mm and the pace lap 1420 rpmand use of motion eat 0,18 mm / rev which was during 0,68 minutes.Basedon analisys of variant ( anova ) that parameter most significant inmempengaruh age wearing a drill bit is the pace lap ( n ). The greater thepace lap ( n ) and wear a drill bit will be more quickly, this is because hightemperatures in the result of friction between screw eyes and workpiece.
Studi simulasi penggunaan airfoil naca 6412 sebagai sudu pada turbin angin crossflow melalui pemodelan CFD 2 dimensi Muhammad Ivan Fadhil Hendrawan; Dominicus Danardono; Syamsul Hadi
Jurnal Teknik Mesin Indonesia Vol 13 No 1 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (938.411 KB) | DOI: 10.36289/jtmi.v13i1.87

Abstract

AbstrakSimulasi ini bertujuan untuk mengetahui pengaruh sudut sudu dan jumlah sudu turbin angin sumbu vertikal cross flow runner terhadap peningkatan kinerja turbin angin. Turbin memiliki jumlah sudau 20, 22, dan 24. Simulasi dilakukan dalam analisis 2D menggunakan ANSYS-Fluent. Tip Speed Rasio bervariasi pada kisaran 0,1-0,5 dengan kecepatan konstan inlet 2 m/s. Efek dari jumlah sudu terhadap torsi dan koefisien daya dianalisis dan dibandingkan. Telah dihasilkan bahwa koefisien daya terbaik adalah 0,5 pada Tip Speed Rasio 0,3.
Efisiensi penggunaan tiny oil pada saat start up boiler PLTU pacitan Wawan Trisnadi Putra; Muh. Malyadi; Moch. Sofyan Anas
Jurnal Teknik Mesin Indonesia Vol 11 No 1 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (590.099 KB) | DOI: 10.36289/jtmi.v11i1.51

Abstract

On the boiler combustion technique using tiny oil gun is a new environmentally friendly technologies. Application of tiny oil gun on the boiler pulverized coal can reduce oil consumption HSD, ensuring combustion stability at low load conditions and prevent loss of heat energy in the combustion chamber. The tiny oil burner technology used in the sub-critical pulverized coal boiler Pacitan power plant 315 MW. The purpose of this study was to determine the performance and combustion characteristics of a tiny oil gun and compare the efficiency of the use of tiny oil gun at startup conditions in Pacitan 315 MW power plant boiler when compared to using the oil gun. From the analysis of the operating data can be known the performance results of the tiny oil gun is farmore efficient than oil gun, which reached 74.8%.
Pengaruh jenis proses pemotongan pada mesin milling terhadap getaran dan kekasaran permukaan dengan material aluminium 6061 Okky Nugra Retyawan; Indri Yaningsih; Heru Sukanto
Jurnal Teknik Mesin Indonesia Vol 12 No 1 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (404.21 KB) | DOI: 10.36289/jtmi.v12i1.63

Abstract

This research was aims to determine the effect of the cutting process type on a milling machine to vibration and surface roughness of the aluminum 6061. The specimens were made using a cutting process type face milling, profile milling, pocket milling, slot milling and drilling. Surface roughness data retrieval is done on any type of cutting process using a surface roughness tester and vibration data was taken during a cutting process on any cutting process type using a vibration meter. The results showed the value of surface roughness and vibration in face milling of 0,5368 μm and 1,03 m/s², profile milling of 1,0984 μm and 1,49 m/s², pocket milling of 1,1004 μm and 1,73 m/s², slot milling of 1,4888 μm and 2,44 m/s² and drilling of 1,9944 μm and 18,62 m/s². Cutting process type on a milling machine having an influence on the vibrations and surface roughness. Each cutting process type has a different cutting force. The greater the cutting force that occurs in every cutting process type, the greater the value of the vibration and the surface roughness happened.
Efek penggunaan serbuk karbon aktif sebagai pelumas dalam proses kompaksi Tengku Jukdin Saktisahdan; Muhammad Mujibur Rahman
Jurnal Teknik Mesin Indonesia Vol 13 No 1 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (766.994 KB) | DOI: 10.36289/jtmi.v13i1.82

Abstract

One of the advantages of powder compaction to other manufacturing process is the improved quality with maintained tolerances and reduced processing cost. However, during the compaction phase, significant friction force usually generated which gives adverse effect to the quality of final products. Polymeric lubricant is usually used to reduce friction, both inter-particle and between powder mass and the die surface. However, due to its lower melting temperature, during sintering process, portion of the lubricant at the surface is burnt out and trapped lubricant inside the compact expands leaving pores which lowers down the strength of the sintered products. In order to overcome this problem, fine activated carbon varying from 0.1%, 0.3% and 0.5% was used as admixed lubricant. The feedstock was prepared by mechanically mixing iron ASC 100.29 powder with designated carbon powder for 30 minutes. Powder mass was compacted at 30°C and 150 °C by applying simultaneous downward and upward load of 130 kN. The defect-free green compacts were heated at argon gas fired sintering furnace at different sintering schedule i.e, 800°C, 900°C and 100°C. The sintered products were tested mechanically and their microstructures were evaluated. The results revealed that the properties of sintered products were affected by carbon content, forming temperature, and sintering schedules.
Simulasi distribusi temperatur pada friction stir welding dengan tool pin silinder Gesa Sukmawan; Dominicus Danardono; Bambang Kusharjanta
Jurnal Teknik Mesin Indonesia Vol 11 No 1 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (703.312 KB) | DOI: 10.36289/jtmi.v11i1.46

Abstract

In friction stir welding, it is very important to understand temperature distribution. A three dimensional model temperature distribution during friction stir weldingof the nylon 6 using cylindrical and tapered pin has been simulated using finite element method. A steady state finite Element analysis are performed to obtain the temperature distribution in the welded nylon 6 plate during the welding operation. Heat source from the tool shoulder and the tool pin are set up 80% of the melting point nylon 6. The model has been implemented and solved using ANSYS CFX software. The result showed that peak temperature are higher on the advancing side than the retreating side at the beginning and middle position of friction stir welding process using cylindrical and tapered pin. While the final position of the friction stir welding process with cylindrical and tapered pin, the peak temperature at the retreating side was higher than the advancing side. For overall position of the friction stir welding process with cylindrical and tapered pin, temperature distribution behind the pin was higher than the front pin.
Studi numerik kekuatan material transmisi roda gigi pico hydro Akhmad Nurdin; Dwi Aries Himawanto
Jurnal Teknik Mesin Indonesia Vol 14 No 1 (2019): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.072 KB) | DOI: 10.36289/jtmi.v14i1.101

Abstract

The generator generate optimum electrical energy if drive system sends the power from turbine to generator with the direction of rotation and speed as needed. The object of this research, how to design spur gear transmission apply for pico hydropower. There are several point to design spur gear transmission, i.e. the bending stress and contact stress on the teeth, and shear stress on the shaft. The strength of the tooth and shaft, simulation using by Ansys Workbench 14.5. Materials used to manufacture gears is polyamide 6 and the shaft material is teflon. Furthermore if design allowable the process of manufacture can be begin, and if manufacture finished, carried testing transmission on the pico hydropower prototype. The result of this research are the design spur gear transmission have total gear ratio 1: 2.65 with two pairs of gears each 1:1.73 and 1 : 1.52. Simulate using by Anys Workbench 14.5 shows the value maximum bending stress 6,1453 MPa on the gear driven first mate, the contact stress 15,415 MPa on the gears driving first mate, and shear stress 1,7688 MPa on the output shaft. Experimental test show the gear transmission produce electric power higher than the electric power produced by direct transmission.
Studi eksperimental pengaruh mapping waktu pengapian dan mapping durasi injeksi serta rasio kompresi terhadap perrformansi dan emisi gas buang engine honda CB150R berbahan bakar E50 Dwijo Hartono; Marthen Paloboran; Bambang Sudarmanta
Jurnal Teknik Mesin Indonesia Vol 12 No 2 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1006.529 KB) | DOI: 10.36289/jtmi.v12i2.76

Abstract

Bioethanol is a vegetable fuel that is formulated for motor vehicles. In the application of bioethanol in combustion engines, it requires some modifications to the engine to be used such as changing the ignition time, changing the duration of the injection, changing the compression ratio, and modifying the engine fuel input system. Thus, it is expected to increase the performance of the engine performance. This study focused on Honda CB150R engine with the initial setting on the ECU programmable. Thereafter the fuel injection testing to achieve AFR Bioethanol E50 with injection percentage of 100, 125, 150, 175 and 200 percent of the total fuel injection standard. Then tested using Pertamax (0% bioethanol) under standard conditions as the control group and the use of Bioethanol E50 with variation of ignition timing as the test group by taking 4 variations of advance ignition timing 16 °, 20 °, 24 ° and 28 ° BTDC at compression ratio which has been converted to 12, 12.5, and 13. From this research, the exact mapping of injection mapping at 2000 to 4000 rpm is 150%, while at 5000 to 8000 rpm, the best duration is 125%. As for the ignition timing mapping is obtained in the range of 16 ° and 20 ° BTDC for the compression ratio of 12, 12.5, and 13. Based on the results of au Eu ecu programable on the compression ratio 11 obtained an average value of 13.154 which means the condition of air and material mixture burn is under the afr stoichiometry ie 14.7. As for the results of afr E50 ecu programable on the compression ratio 11 obtained an average value of 11.160, which means the condition of air and fuel mixture is under the afr stoikiometri is 12.6. It shows that the Honda CB150R engine operates on afr under the stoichiometry of the fuel used. So Honda CB150R engine has the characteristics of power to be increased and no detonation occurs, but the fuel consumption time value will decrease as well as CO and HC emissions increased
Pemodelan creep pada pipa sanicro 25 austenitic steel dengan beban tekanan 11.3 MPa dan temperatur 750 ºC Tri Widodo Besar Riyadi; David Setiadhi; Agus Dwi Anggono; Agung Setyo Darmawan
Jurnal Teknik Mesin Indonesia Vol 13 No 2 (2018): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v13i2.109

Abstract

Penelitian ini bertujuan untuk memodelkan creep sebuah pipa Sanicro 25 Austenitic Steel bertekanan rendah pada temperatur 750 ºC menggunakan software berbasis metode elemen hingga. Jenis material dengan beban tekanan dan panas diambil berdasarkan data hasil eksperimen penelitian lain. Geometri pipa mempunyai diameter luar 38 mm, tebal 8.8 mm dan panjang 50 mm. Beban panas sebesar 750 ºC merata pada seluruh bagian pipa, dengan tekanan dalam pipa sebesar 11.3 MPa. Simulasi dilakukan dengan software Abaqus/CAE 6.14-5 dengan durasi 7 x 106 detik. Hasil simulasi untuk creep strain menunjukkan hasil yang sesuai dengan data hasil eksperimen dengan error 2.72%. Pada tekanan 11.3 MPa menghasilkan creep maksimum senilai 3.162 x 10-4. Distribusi tegangan pada penampang pipa menunjukkan bahwa tegangan terbesar terjadi pada bagian dalam pipa sebesar 16.91 MPa dan menurun sampai mencapai nilai terendah pada penampang pipa bagian luar sebesar 14.58 MPa. Hasil simulasi juga menjelaskan pengaruh tekanan terhadap kurva regangan creep terhadap waktu.
Pengaruh plunge depth dan preheat terhadap sifat mekanik sambungan friction stir welding polyamide Budy Nugroho; Triyono .; Nurul Muhayat
Jurnal Teknik Mesin Indonesia Vol 11 No 2 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.987 KB) | DOI: 10.36289/jtmi.v11i2.57

Abstract

Friction stir welding is a joining method that utilizes heat caused by the friction between workpiece material and pin. It employs several parameters such as tool rotational speed, welding speed, and plunge depth. The objective of this research is to investigate the effect of plunge depth and preheat on the mechanical properties of friction stir welding polyamide materials. This research used the plunge depths of 5.6 mm, 5.65 mm, 5.7 mm, and 5.75 mm. The parameters maintained to be constant were tool rotational speed of 620 rpm, welding speed of 7.3 mm/minutes, and tool tilt angle of 20. Preheat of 1700C was done as well non preheat method to compare of both methods.The maximum tensile and bending strength was obtained at the tool plunge depth of 5.7 mm with preheat. The value of maximum tensile and bending is 27,3 Mpa, and 75,7 Mpa. The optimization of tool plunge depth and preheat made the stirring better so that the molten material could spread all over weld region. The spreading of the molten material minimized void or defect in the weld region. As a result, the mechanical characteristic of joint increased.

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