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All Journal Jurnal Penelitian Pertanian Terapan Journal of Engineering and Applied Technology Journal of Mechanical Engineering Automotive Experiences Creative Research in Engineering (CERIE) Teknika
Agus Jamaldi
Sekolah Tinggi Teknologi Warga Surakarta
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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EVALUASI AKURASI DIMENSI PADA OBJEK HASIL 3D PRINTING Deni Andriyansyah; Sriyanto Sriyanto; Agus Jamaldi; Ikhwan Taufik
Journal of Mechanical Engineering Vol 5, No 1 (2021): Journal of Mechanical Engineering
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/jom.v5i1.3942

Abstract

ABSTRAKFused Deposition Method (FDM) merupakan salah satu metode 3D printing yang paling populer digunakan. Teknologi FDM menawarkan proses manufaktur yang relatif lebih cepat dan murah bila dibandingkan dengan CNC atau injection moulding. Pada FDM, filament diumpankan ke dalam ekstruder yang dipanaskan pada temperatur tertentu kemudian didorong keluar melalui sebuah nozzle untuk menghasilkan lapisan-lapisan objek. Hingga saat ini, banyak komunitas yang menghasilkan mesin-mesin 3D printer skala kecil karena proyek-proyek teknologi 3D printing bersifat open-source. Masing-masing komunitas memiliki standar tersendiri dalam membuat mesin 3D printer sehingga salah satu masalah yang timbul dari aktifitas ini adalah akurasi objek hasil 3D printing yang kurang seragam. Penyimpangan geometri akan mempengaruhi proses desain dan produksi objek-objek hasil 3D printing. Hal ini terutama dalam pembuatan objek-objek yang memerlukan proses pemasangan/perakitan. Artikel ini bertujuan untuk mengetahui penyimpangan geometri objek hasil 3D printing yang dihasilkan dari mesin 3D printer FDM DIY. Pembuatan objek menggunakan 3D printing DIY mengalami deviasi pada dimensi geometri dan posisi. Deviasi geometri bervariasi dari -0,08 mm hingga +0,14 mm. Sedangkan deviasi posisi berada di rentang -0,08 mm hingga +0,12 mm. Berdasarkan data deviasi yang dihasilkan dari perbandingan di atas, maka pembuatan objek 3D printing dapat disesuaikan dengan simpangan masing-masing. Hal ini menjadi penting untuk mendapatkan objek dengan akurasi yang maksimal sehingga proses perakitan komponen dapat dilakukan dengan mudah dan sesuai dengan peruntukannya.Kata kunci: FDM, akurasi, poros, lubang ABSTRACTThe Fused Deposition Method (FDM) is one of the most popular 3D printing methods used. FDM technology offers a manufacturing process that is relatively faster and cheaper when compared to CNC or injection molding. In FDM, the filament is fed into an extruder which is heated to a certain temperature and then pushed out through a nozzle to produce layers of objects. Until now, many communities have produced small-scale 3D printer machines because 3D printing technology projects are open-source. Each community has its own standard in making 3D printer machines so that one of the problems that arise from this activity is the accuracy of the objects resulting from 3D printing which is less uniform. Geometry deviations will affect the design and production processes of 3D printed objects. This is especially true in the creation of objects that require an assembly / assembly process. This article aims to determine the irregularities in the 3D printed object's geometry resulting from the FDM DIY 3D printer machine. Making objects using DIY 3D printing experiences a deviation in the dimensions of the geometry and position. The geometry deviation varies from -0.08 mm to +0.14 mm. While the position deviation is in the range of -0.08 mm to +0.12 mm. Based on the deviation data generated from the above comparisons, the creation of 3D printing objects can be adjusted according to the respective deviation. It is important to obtain objects with maximum accuracy so that the component assembly process can be carried out easily and according to its purpose. Keyword: FDM, accuration, pivot, hole
Pengaruh Penambahan Isolator Terhadap Distribusi Temperatur dan Nyala Efektif Api Pada Tungku Gasifikasi Tipe Downdraft Agus Jamaldi; Nugroho Tri Atmoko; Arif Hidayat Purwono; Edy Suryono
Creative Research in Engineering Vol 1, No 2 (2021): Creative Research in Engineering (CERIE)
Publisher : Lembaga Publikasi Ilmiah dan Penerbitan (LPIP)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (762.906 KB) | DOI: 10.30595/cerie.v1i2.10845

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh penggunaan isolator terhadap kinerja tungku gasifikasi tipe downdraft . Tiga bahan isolator yang digunakan yaitu serbuk batu bata, serbuk batu padas dan pasir. Parameter utama yang digunakan sebagai tolok ukur kinerja tungku gasifikasi yaitu suhu pembakaran dan durasi  nyala  api  yang dihasilkan dari bahan  bakar  biomassa . Biomassa yang digunakan dalam penelitian ini adalah  sekam padi. Penelitian dilakukan dengan dua tahap, tahap pertama dilakukan pengujian kinerja tungku gasifikasi tanpa menggunakan isolator. Tahap kedua yaitu dilakukan pengujian dengan menggunakan isolator  yang dipasang pada dinding  tungku gasifikasi. Hasil pengujian tungku tanpa isolator didapatkan temperatur rata-rata nyala api sebesar 272 °C dan nyala efektif  api  selama 5 3  menit . Pengujian dengan penambahan isolator didapatkan suhu rata-rata nyala api  dengan bahan  serbuk batu bata sebesar 506°C dengan isolator suhu 102°C dan nyala efektif  api  selama 54 menit. Untuk serbuk batu padas suhu rata-rata nyala api  sebesar 484°C dengan isolator suhu 134°C dan nyala efektif  api  selama 53 menit. Sedangkan isolator pasir temperature rata-rata nyala api  sebesar 466°C, temperature isolator 146°C dan nyala efektif  api  selama 52 menit. Berdasarkan  hasil penelitian yang dilakukan  maka kinerja tungku gasifikasi dengan menggunakan isolator meningkat dibandingkan tungku tanpa isolator . I solator serbuk batu bata meningkat kan kinerja  tungku gasifikasi  sebesar 90,2% sedangkan untuk serbuk batu padas dan pasir masing-masing sebesar 83,2% dan 77,6%. Hasil ini menunjukkan bahwa serbuk batu bata merupakan isolator yang paling optimal dibandingkan dengan serbuk batu padas dan pasir. 
An Experimental Study of the TEG Performance using Cooling Systems of Waterblock and Heatsink-Fan Nugroho Tri Atmoko; Agus Jamaldi; Tri Widodo Besar Riyadi
Automotive Experiences Vol 5 No 3 (2022)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/ae.6250

Abstract

Two third of the total energy in the internal combustion engine (ICE) system is lost and turns as waste heat through the exhaust system and coolant circulations. Therefore, it is necessary to have a technology that is able to convert waste heat from ICE into electrical energy using thermal electric generator (TEG). To have the best thermoelectric generator (TEG) performance in terms of higher electricity generation, the temperature on the hot surface should be higher, and the temperature on the cold surface should be as low as feasible. The goal of the study was to study how differences in TEG cooling systems affected the overall performance. Water block and heatsink-fan are two different types of cooling systems that have been used in this experiment. The water flow rate in water block cooling systems varies between 200, 300, 400, 500, and 600 l/h. The TEG module was heated with gas-fired lighters. Arduino-based data loggers were used to record hot and cold temperatures on the TEG surface. A USB multimeter is used to measure TEG performance as electrical voltage. The results showed that 300 l/h was the best water flow rate for TEG cooling. When using a water block cooling system instead of a heat sink, the electrical voltage generated by the TEG module is 12 percent higher. This study found that a cooling system with water blocks is superior to heatsink-fan.
ANALISIS STATIK POROS BINTANG AISI 1045 PADA MOTOR MATIC Edy Suryono; Agus Jamaldi; Y. Yulianto Kristiawan; Bambang Margono; Hermawan Susanto; Galuh Renggani Wilis
Teknika Vol 7 No 4 (2022): October 2022
Publisher : Pusat Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52561/teknika.v7i4.204

Abstract

Poros merupakan salah satu komponen mesin yang sangat vital. Berfungsi sebagai penerus daya dan gerakan yang mengakibatkan mesin tersebut dapat beroperasi dengan baik. Poros bintang pada kendaraan matic roda dua memiliki peran utama karena berfungsi untuk menggerakkan roda belakang secara langsung. Beban yang diterima poros berupa beban static yaitu beratkendaraan berpenumpang, berat velg dan ban, serta beban torsi. Sehingga diperlukan bahan poros yang mampu meredam beban-beban tersebut. Penelitian ini ditujukan untuk menganalisa tegangan yang terjadi pada poros bintang berdasarkan beban yang dideritanya. Sehingga diharapkan dapat mendeteksi area yang mengalami titik kritis. Metode yang dilakukan dalam penelitian ini menggunakan analisis static berbasis metode elemen hingga menggunakan software Solidwork. Material poros bintang berupa AISI 1045 dengan tegangan ijin sebesar 585 MPa, dan Modulus elastisitas sebesar 200 GPa. Poros bintang menerima beban static sebesar 72,3 N, 1203 N dan Torsi sebesar 9,3 Nm. Hasil penelitian menunjukan area yang mengalami tegangan maksimum, regangan maksimum dan displacement maksimum berada pada P8, yaitu tegangan sebesar 81,8 MPa, regangan tertinggi 0,000045, dan displacement tertinggi 0,00047 mm. Hal ini menunjukan bahwa area tersebut mengalami pengaruh beban paling besar, yaitu terutama pada bagian siku poros bertingkat. Area ini perlu perhatian khusus, sehingga dapat terdeteksi lebih awal terjadinya kegagalan produk, walaupun tegangan yang dialami hanya sebesar 13,98%.
Static analysis of thrust bearing with lubrication hole variation in an automobile's connecting rod Edy Suryono; Gilar Selo Yuda Pratama; Agus Jamaldi
Journal of Engineering and Applied Technology Vol 4, No 1 (2023): (March)
Publisher : Faculty of Engineering, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jeatech.v4i1.58461

Abstract

The research used the thrust bearing of a 1298cc automobile. The thrust-bearing material was annealed stainless steel (SS 201) with a tensile strength of 685 MPa and a yield strength of 292 MPa. The research objective was to obtain the best static thrust-bearing analysis results based on CAE software analysis. The research method included design stages, material parameters, fixed geometry determination, loading, meshing settings, computation, and result data. The simulation results were in the form of stress values, where the maximum stress value on the three-hole, one-hole, and non-hole thrust bearings were 227.2 MPa, 215.1 MPa, and 138 MPa, respectively. The non-hole thrust bearing could be the safest among all variations. The non-hole thrust bearing had a critical stress area value of 154 MPa, where it could absorb a force of 52.75% of the yield strength, the lowest strain was 8.531E-4, and had the highest minimum safety factor of 1.896.
Desain dan Analisis Performa Mesin Pemipil Jagung Portabel Berkapasitas Sedang Haikal; Arif Hidayat Purwono; Agus Jamaldi; Bambang Margono; Edy Suryono; Johanes Wawan Joharwan; Apri Wiyono; Isnarno Isnarno; Dewi Ratna Nurhayati
Jurnal Penelitian Pertanian Terapan Vol 23 No 2 (2023)
Publisher : Politeknik Negeri Lampung.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jppt.v23i2.2087

Abstract

Corn shelling tools have developed in Indonesia ranging from very simple corn shellers to mechanical corn shellers. However, the maize sheller with a medium-scale capacity has not been well developed. The research objective was to design and analyze the performance of a medium-capacity portable corn sheller machine to meet the maize harvest processing process, which can increase productivity, the quality of maize shelled with medium-scale capacity and also develop a new shelling tool design. This research was conducted in 3 stages, namely field observation, design, and machine performance. The results showed a corn sheller machine with a 0.5 hp electric motor. The results of the work show that the speed of the shelling process is very influential on the results of the shelling. The higher the speed of the shelling process, which is 2400 rpm, the better or no leftover corn is shredded.
Co-Authors Apri Wiyono Arif Hidayat Purwono Atmoko, Nugroho Tri Bambang Margono Deni Andriyansyah Dewi Ratna Nurhayati Edy Suryono Edy Suryono Galuh Renggani Wilis Gilar Selo Yuda Pratama Haikal Hermawan Susanto Isnarno Isnarno Johanes Wawan Joharwan Sriyanto Sriyanto Suryono, Edy Taufik, Ikhwan Tri Widodo Besar Riyadi Y. Yulianto Kristiawan