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All Journal Jurnal Teknologi Rekayasa Mesin Prosiding Semnastek Menara Ilmu Industrial Engineering Journal (IEJ) Journal of Welding Technology Journal of Applied Sciences and Advanced Technology Jurnal Hurriah: Jurnal Evaluasi Pendidikan dan Penelitian Malikussaleh Journal of Mechanical Science Technology Jurnal Polimesin
Aljufri Aljufri
Universitas Malikussaleh
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Analysis of Defects in SMAW Welding Joint Using E 7016 Electrode Due to the Direct Cooling Process Aljufri Aljufri; Indra Mawardi
Journal of Welding Technology Vol 4, No 2 (2022): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v4i2.3304

Abstract

Welding defects in a construction if repairs are not immediately carried out, then in the weld defect area can cause cracks that are aggravated by wider cracking and corrosion so that it can cause brittle fractures to the detriment. The problem with brittle fracture is a big problem in steel that has been welded, especially in welded joints, this brittle fracture becomes more important due to the factors of voltage concentration, inappropriate structure and defects in the weld, the purpose of this study: to find out how to use suitable electrodes for ST 37 material in the welding process, whose cooling process directly uses Oil and water (Direct Colling Process),  and to obtain optimal welding results after going through the results of welding defect examination using the Penetrant Test method, and the Maghnetic Particle Test.  From the results of the examination research conducted by the Welding Inspection team of PT. Superintending Company of Indonesia (SUCOFINDO) to 15 ST 37 specimens that have undergone welding does not show any welding defects, in the sense that they are still within the acceptable limit criteria (Acceptance Standard Ansi B 31.3), from the results of tensile testing On the use of different electrodes in the welding process of ST 37 material, shows that the ST 37 material whose welding process uses electrode E7016 welded results and tensile strength is better than the  ST 37 material which in the welding process uses electrodeS E 7018 with the cooling process using Oil and water
PERANCANGAN SISTEM MEKATRONIKA PADA MESIN PEMOTONG RUMPUT MENGGUNAKAN HYBRID ENERGY Aljufri Aljufri; Abdul Rahman; Reza Putra
Jurnal Teknologi Vol 15, No 1 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.1.57-64

Abstract

This design aims to apply mechatronics technology to a lawn mower. The test includes energy source, transmission capability and comparison of energy consumption with conventional engines This lawn mower design uses a battery with a voltage of 12 volts with a current of 7.2 Ah. The control system is with a frequency of 315 Mhz. Actuators consist of three namely, cutting motor, transmission drive motor and servo motor. Charging the battery uses a hybrid system, namely a solar cell with a capacity of 10 wp and an electric charger of 72 Watts. The engine can operate depending on the power used with a vulnerable time of 50 minutes to 75 minutes per charge. The fastest time when testing at a grass height of 20 mm with a work duration of 6 minutes 15 seconds while the longest time at a grass height of 60 mm for 11 minutes 30 seconds. The charging time of the battery using the longest solar cell on the fourth day for 11 hours and 43 minutes, while the fastest time on the fifth day is during for 6 hours and 42 minutes. For charging using charging a charging time of 1 hour 12 minutes. This machine is more efficient up to 59,000 per month with the same parameters as conventional machines
Analisa Kekuatan Tarik Serat Tunggal Pelepah Aren Dengan 10% NaOH Edy Yusuf; A Aljufri
Malikussaleh Journal of Mechanical Science and Technology Vol 4, No 2 (2016): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v4i2.10894

Abstract

Pengaruh kadar air terhadap kekuatan tarik interfacial serat pelepah aren yang diberi perlakuan alkali dengan 10%NaOH. Menggunakan satu jenis serat alam yaitu serat pelepah aren. Pengujian kekuatan mekanik dari komposit yang dilakukan dengan menggunakan pengujian tarik (tensile test) yang dilakukan dengan mesin uji tarik pearson panke Equipment Ltd, bentuk dan ukuran sesuai dengan ukuran standar ASTM D 3379-75. Menganalisa dan membandingkan komposit serat pelepah aren dengan NaOH, yaitu 10% kadar NaOH. Analisa nilai yang terbaik dari kekuatan tarik pada serat pelepah aren yaitu dengan perlakuan alkali 10% sebesar menunjukkan bahwa nilai Tegangan tarik yang tertinggi pada Serat pelepah aren yaitu pada perlakuan alkali 10% NaOH dengan nilai 51.2 MPa dan nilai terendah yaitu dengan nilai 24.3 MPa, dan regangan tertinggi 6.4% dan nilai regangan terendah 0.2%, untuk modulus elastisitas tertinggi sebesar 127.93 dan nilai terendah sebesar 4.7 jadi pada penelitian perlakuan NaOH 10% bila diberikan larutan alkali yang semakin tinggi akan menyebabkan berkurangnya kandungan semiselulosa, lignin atau pektin pada serat.
ANALISA UNJUK KERJA GENERATOR SET BERBAHAN BAKAR BIOGAS DARI LIMBAH RUMAH MAKAN Muhammad Rizqi Almuhtadee; Adi Setiawan; Alchalil Alchalil; Aljufri Aljufri
Jurnal Rekayasa Mesin Vol. 14 No. 2 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i2.1463

Abstract

Anaerobic digestion of biomass is a beneficial strategy for energy production as well as waste management system. Through the fermentation process, the sources of biomass such as domestic organic and restaurant wastes can be utilized to generate renewable energy. In this study, the biogas was produced from food waste to generate electricity. The performance of biogas-fueled generator sets was evaluated and compared with gasoline (pertalite) fuel at various electric loads. There are seven different load variations: idle, 100, 300, 500, and 700 Watts. Data was collected and analyzed using the combustion engine gas cycle theory. The biogas-fueled engine test results indicated that the brake power on average was 1.9 kW, or 65.6% of the maximum brake power specified by the engine manufactured. The average torque was 7.02 Nm, or 68.14% of the maximum torque that specified on the name plate. The average brake specific fuel consumption (BSFC) of biogas was 0.41 kg/kWh, while the BSFC of pertalite fuel was 0.168 kg/kWh. Compared to biogas fuel, the BSFC of pertalite is less with a difference of 0.242 kg/kWh. Overall, biogas produced from restaurant waste is technically feasible to be used as an alternative fuel for electric generator engine.
PERANCANGAN MESIN MODIFIKASI CAMSHAFT TIPE SINGLE CUTTER MENGGUNAKAN AUTODESK INVENTOR Aljufri Aljufri; Abdul Rahman; Syarifah Akmal; Ranu Firmansyah; Abdul Ali Chaniago
Jurnal Teknologi Vol 15, No 2 (2023): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.15.2.299-304

Abstract

Camshaft is one of the main components of a 4-stroke motorcycle where the Camshaft has a function as a regulator of opening and closing valves in the working process of the engine itself.  The profile of the camshaft that is thirsty due to friction so that it must be replaced with a new one or do cam turning using a grinder. The purpose of this design is to design a camshaft engine, which is designed to facilitate the work of mechanics, especially motorcycle mechanics. and can be used as a tool to modify the camshaft setandart into camshaft racing. This engine will be able to produce Camshaft racing. In the process of machine design is carried out in several stages, namely analyzing needs, defining and listing design requirements, designing product concepts, and designing products and documenting products in the form of machine design drawings. The energy source is supplied from electricity. The results of this design resulted in the design and working drawings of camshaft modified engine products including shafts, camshaft mounts, pulley mounts, engine frames, and transmission systems. In this design, camshafts will also be tested with 3 variations of camshaft profiles to determine the value of power and torque due to changes in camshaft diameter. From the three test results, standard camshaft variations and modifications found changes in power and torque values which increased in value by 1 hp and clutch slip occurred during the dayno process which showed a fracture at engine speed 8000 rpm.
Preliminary design of shrimp pond paddle wheel powered by solar energy Aljufri Aljufri; Aris Abizar; Revi Syarlian; Adi Setiawan
Jurnal POLIMESIN Vol 19, No 1 (2021): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v19i1.1914

Abstract

The level of oxygen solubility in shrimp ponds is crucial for the success of shrimp farming, therefore the farmers need waterwheels to increase levels of dissolved oxygen in the pond. In general, shrimp farmers are still relying on the wheels powered by electricity which is supplied from national grid and diesel engines. To overcome these problems, an alternative solution is needed by utilizing solar energy. This work aims to develop a simple design of paddle-wheel powered by solar energy for shrimp farming waterwheels. The design of this equipment used a 50 Wp photovoltaic panel to turn a 250-Watt electric motor. The electricity generated in the form of DC current, stored in a 50 Ah battery then the DC current is converted into AC current by 1000-Watt inverter. Dissolved oxygen (DO) sensor digital data that is connected to a computer via Arduino Uno was recorded and displayed on the serial monitor and LCD. This equipment has been successfully tested by running directly using solar energy sources for 35 minutes.
The Influence Of Work Surface Roughness Caused By Fraising Machined With HSS Chies Aljufri, Aljufri; Rizki, Muhammad Nuzan; Akmal, Syarifah; Mutia, Sri; Rambe, Farhan Wafi
Journal of Applied Sciences and Advanced Technology Vol 6, No 2 (2023): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.6.2.49-56

Abstract

The development of production techniques is required to produce good products that have standards for the products produced, both in terms of profile shape, size precision, surface roughness, hardness, material flexibility, and others that comply with standards. The surface roughness of a product can affect its functions, such as its level of precision and ability to accept loads. This research aims to find out how much influence cutting speed and depth of cut have on surface roughness with variations in cutting speed parameters of 21 meters/minute and 26 meters/minute and for AISI 4140 steel cutting speed parameters of 12 meters/minute and 17 meters/minute and cutting depths of 0.1 mm and 0.3 mm on four types of steel with End Mill cutting blades made from High-Speed Steel with a total of 4 flute cutting blades. Next, surface roughness testing and analysis of variance were carried out to determine the influence of parameters on surface roughness. The results obtained were that the largest average surface roughness, namely Ra = 5.33 µm, occurred on AISI 4140 steel at a cutting speed of 12 m/min with a cutting depth of 0.3 mm. Meanwhile, the smallest average surface roughness, namely Ra = 0.91 µm, occurred on AISI 1045 steel at a cutting speed of 21 m/min with a cutting depth of 0.1 mm. Next, an analysis of the variance method was also carried out with the following results: cutting speed only affected S45C steel because the value of Fcount>Ftable (13.18107506 > 5.32). The depth of cut does not have a significant effect on surface roughness on all types of steel because of the comparison results Fcount<Ftable. The interaction of cutting speed and cutting depth does not affect surface roughness because the comparison shows that Fcount <Ftable for all types of steel.
Pemanfaatan Serat Bambu Apus Sebagai Bahan Pembuatan Helm Safety Syahputra, Amri; Nayan, Ahmad; Adhiya Putra, M. Iqbal; Aljufri, A; Suryadi, S
Malikussaleh Journal of Mechanical Science and Technology Vol. 8 No. 1 (2024): Malikussaleh Journal of Mechanical Science and Technology
Publisher : E-Journal Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v8i1.17285

Abstract

The use of apus bamboo fiber material as an alternative material to fiber glass in the materials sector, especially in safety helmets, is now becoming increasingly well known to people. This is because the advantages of this natural fiber reinforced composite material are environmentally friendly, lighter weight, relatively cheap price, excellent mechanical properties, and easy to obtain. So the aim of this research is to determine the process of making safety helmets using the vacuum infusion method and to determine the strength of free fall test specimens reinforced by apus bamboo fiber. As a result of the vacuum infusion method, the safety helmet that is made has a smoother surface with the same thickness. The resulting helmet has a bottom length of 30 cm, width 22 cm, height 14 cm and top length 24 cm. The free fall test uses variations in height from a fall distance of 1 meter, 2 meters and 3 meters. Meanwhile, the loads are 0.694 kg and 1.563 kg. The results of the potential energy sensor for a load of 0.694 kg at a height of 1 meter is 5.59 joules, a load of 0.694 kg at a height of 2 meters is 12.39 joules, and a load of 0.694 kg at a height of 3 meters is 19.18 joules. Meanwhile, sensor data for a load of 1,563 kg at a height of 1 meter is 14.11 joules, a load of 1,563 kg at a height of 2 meters is 29.42 joules, and a load of 1,563 kg at a height of 3 meters is 44.74 joules.
Pengaruh Surface Roughnes Pada Material AISI 1045 dan AISI 4140 Akibat Proses Pemesinan Bubut Azhari, Wafiq; Aljufri, Aljufri; Rahman, Abdul; Putra, Reza; Akmal, Syarifah
Malikussaleh Journal of Mechanical Science and Technology Vol 7, No 1 (2023): Malikussaleh Journal of Mechanical Science and Technology
Publisher : Malikussaleh University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v7i1.12448

Abstract

Lathe machining is one type of conventional machine tool used for cutting/filling workpieces which is done by making an incision on the workpiece where the tool is moved translationally and parallel to the axis of the rotating workpiece. The result of the components of the turning process that is commonly done is surface roughness which is influenced by tool cutting angle, feeding speed, cutting speed, depth of cut. This study was conducted to determine how much influence the speed of feeding and depth of feeding on AISI 1045 steel and AISI 4140 steel materials used in shafts, conecting roads, gears with carbide chisels. With Vc=140 m/min, Vc=150 m/min, Vc=170 m/min, and Vc=180 m/min, and knowing the surface roughness of the workpiece using a carbide tool.  From the results of research on AISI 1045 and AISI 4140 steel for cutting along 50 mm with engine speed 1200 rpm and cutting depth 0.3 mm, as well as the cutting speed used Vc=140 m/min, Vc=150 m/min, Vc=170 m/min and Vc=180 m/min and the initial cutting distance of 4 mm, the time needed is 1,125 minutes. For the surface roughness value of AISI 1045 steel material and AISI 4140 steel has four variations in lathe feeding speed in this study, which in each variation has a different surface roughness value, the smallest surface roughness value is AISI 4140 steel with a feeding speed vc = 180 m / min surface roughness value of 0.705 μm compared to AISI 1045 steel material. This is due to the greater the movement of the feeding speed of feeding, the smaller the value of the surface roughness of the material
Analisa Kekuatan Tarik Komposit Serat Rotan Menggunakan Resin Epoksi dengan Variasi Fraksi Volume Irfansandi, Tomi; Muhammad, M; Safriwardi, Ferry; Aljufri, A
Malikussaleh Journal of Mechanical Science and Technology Vol. 8 No. 1 (2024): Malikussaleh Journal of Mechanical Science and Technology
Publisher : E-Journal Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/mjmst.v8i1.14882

Abstract

Perkembangan pengetahuan dalam bidang komposit semakin pesat seiring dengan perkembangan teknologi dan permintaan dari sektor industri. Hal ini terlihat dari banyaknya penelitian yang dilakukan untuk mengembangkan bahan komposit baru dengan sifat yang lebih unggul. Pencetakan komposit dilakukan dengan mencampurkan serat kulit rotan 20% : 80% resin epoksi, serat 30% : 70% resin, epoksi dan serat 40% : 60% resin epoksi dengan perendaman alkali NaOH 5% selama 2 jam. Pembuatan komposit dilakukan dengan metode Hand-Lay Up. Sifat mekanik pengujian kekuatan tarik berdasarkan standar (ASTM D-3039) dan foto makro. Hasil penelitian dari variasi persentase tersebut yang memiliki kekuatan tarik tertinggi pada serat kulit rotan 40% : resin epoxy 60% dengan nilai rata-rata sebesar 51,65 Mpa, kekuatan luluh 3,02 Mpa, dan Elongation yaitu 4,25%.  sedangkan nilai kekuatan tarik terendah terdapat pada serat kulit rotan 20% : resin epoxy 80%, dengan nilai rata-rata sebesar 27,44 Mpa, kekuatn luluh 2,12 Mpa, dan elongation 6,25%. Untuk hasil pengamatan patahan foto makro jenis patahan yang terlihat ialah patah getas. Dari hasil pengamatan menunjukkan bahwa komposit dengan variasi serat kulit rotan 40% : resin epoxy 60%  layak digunakan sebagai material tensile alternatif.
Co-Authors Abdul Ali Chaniago Abdul Rahman Abdul Rahman Abubakar Abubakar Abubakar Dabet Adhiya Putra, M. Iqbal Adi Setiawan Aditya Kamanurandi Aditya Kamanurandi Ahmad Nayan Akmal, Syarifah Alchalil Alchalil Aris Abizar Azhari, Wafiq Butar Butar, Iqbal Duarda Dabet, Abubakar Edy Yusuf F Fahmi Indra Mawardi Irfansandi, Tomi K Khairina M Muhammad Mardian, Rikki Muhammad Muhammad Muhammad Rizqi Almuhtadee Muhammad Yusuf Muhammad, M Mutia, Sri Putra, Reza Rahman, Abduk Rambe, Farhan Wafi Rangkuti, Mhd. Saleh Ranu Firmansyah Revi Syarlian Reza Putra Reza Putra Riskan, Ardi Safriwardi, Ferry Subahgia, Jeroh Miko Suci Indah Sari Suryadi, S Syahputra, Amri Syamsiar, Syamsiar Syarifah Akmal Teuku Mudi Hafli Yasir Amani Zulfahmi Z Zulfahmi Zulfahmi Zulfahmi Zulfahmi