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RANCANG BANGUN MESIN FRICTION WELDINGUNTUK PENGELASAN BAJA ST 37 DENGAN DIAMETER MAKSIMAL Â½ INCH Kurniawan, Ipung; Pujono, Pujono; Nurhilal, Mohammad; Prabowo, Dian
Bangun Rekaprima: Majalah Ilmiah Pengembangan Rekayasa, Sosial dan Humaniora Vol 8, No 1, April (2022): Bangun Rekaprima
Publisher : Politeknik Negeri Semarang

Pengelasan gesek merupakan proses pengelasan tanpa menggunakan bahan tambah. Gesekan diakibatkan oleh pertemuan kedua benda kerja yang menghasilkan panas kemudian melumerkan kedua ujung benda kerja dan akhirnya terjadi proses penyambungan benda kerja. Tujuan dalam rancang bangun mesin friction welding yaitu membuat perancangan pada mesin friction welding, menghitung komponen elemen mesin, menghitung mekanika teknik pada rangka, menghitung gaya dorong aktuator, menghitung estimasi total waktu proses produksi, melakukan uji fungsi pada bagian sistem transmisi dan kontrol tekan dan uji hasil variasi diameter besi pejal silinder. Metode perancangan dengan pendekatan metode VDI 2222. Hasil dari rancangan berupa desain mesin friction welding. Dihasilkan motor listrik yang digunakan memiliki daya 1,5 HP, puli yang digunakan Ã˜6 inch dan Ã˜2 inch, sehingga didapati putaran sebesar 4200 rpm, panjang v-belt 1.324,18 mm, poros memiliki ukuran Ã˜25 mm.Hasil dari rancang bangun didapatkan hasil yaitu material yang digunakan yaitu besi siku dan kanal U dengan ukuran frame 1200x400x855 mm, slider 400x206x200 mm. Gaya dorong yang dihasilkan aktuator sebesar 480 N. Estimasi total waktu produksi selama 20,24 jam. Sistem transmisi mampu meneruskan daya dari motor penggerak menuju rotary chuck dan kontrol tekan mampu bergerak maju dan mundur. Mesin friction welding berhasil menyambung besi pejal silinder dengan Ã˜6 mm, Ã˜8 mm, Ã˜10 mm dalam waktu 1 menit,berhasil menyambung 2 besi pejal silinder dengan ukuran Ã˜1/2 inchi dengan variasi tekanan 6[bar], 7[bar], 8[bar], namun besi tersambung tidak sempurna. Hasil uji tarik menunjukkan kekuatan tarik tertinggi sebesar 153 MPa

PENGARUH PERLAKUAN MEKANIKAL PADA PENGELASAN FRICTION STIR WELDING (FSW) ALUMINIUM AA2024-T3 pujono, pujono; Prabowo, Dian; Kurniawan, Ipung; Pribadi, Joko Setia; Yusuf, Muhamad
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2941

AbstrakAluminium merupakan salah satu jenis logam ringan yang banyak digunakan dan menjadi logam utama pada konstruksi alat transportasi. Aluminium paduan seri AA2024-T3 menjadi salah satu tipe yang banyak digunakan pada badan pesawat terbang. Hal ini karena paduan aluminium seri AA2024-T3 memiliki sifat mampu bentuk (formability) yang baik, tahan terhadap korosi dan memiliki berat yang ringan. Penggunaan paduan ini pada konstruksi yang memerlukan penyambungan las khususnya las MIG atau TIG, ternyata menghasilkan performa yang tidak baik karena menghasilkan porositas dan retak panas (hot cracking). Salah satu solusi untuk memperbaiki kualitas hasil las pada AA2024-T3 adalah dengan melakukan pengelasan menggunakan metode friction stir welding (FSW). FSW merupakan pengelasan solid state yang tidak memerlukan bahan tambah, hemat energi dan ramah lingkungan. Permasalahan yang muncul pada hasil las FSW adalah adanya distorsi yang cukup besar dan menurunnya sifat mekanik hasil las. Oleh karena diperlukan perlakuan tambahan untuk mengatasi masalah tersebut, diantaranya adalah dengan memberikan perlakuan mekanik berupa rolling. Metode yang digunakan adalah memberikan perlakuan rolling pasca las FSW dengan beban 300 kg. Untuk mengetahui dampak dari pemberian perlakuan rolling maka dilakukan pengukuran distrosi, uji foto makro dan mikro, uji distribusi kekerasan dan pengujian kekuatan tarik. Kekuatan tarik tertinggi diperoleh pada spesimen mekanikal yaitu 334.6 MPa, sedangkan pada spesimen as welded diperoleh nilai tegangan tarik sebesar 333.5 MPa. Butiran mikro pada daerah las berbentuk fine grain equiaxed. Nilai distorsi dan distribusi antar kedua spesimen hampir serupa, dan nampaknya perlakuan rolling pasca las dengan beban 300 kg tidak memberikan dampak yang signifikan.Kata kunci : aluminium, rolling, friction stir welding, distorsi.

Pengaruh Penambahan Limbah Plastik Sebagai Alternatif Pengganti Bata Beton Dinding Rumah Prabowo, Dian; Hardini, Probo; Kurniawan, Ipung; Santoso, Agus
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i1.1513

The current handling of waste, especially styrofoam, plastic, used oil is not optimal, these wastes can be used to manufacture other products such as bricks with a simple process. If the waste is processed properly, it will get good economic value. To get a good value or product, it is necessary to do research or testing, as in this study, namely the use of styrofoam waste, plastic and used oil to be used as bricks. In this study, it is hoped that the public will understand and understand the quality of the types of composite bricks and ordinary types of bricks seen from their advantages and disadvantages. Styrofoam waste, plastic and used oil are mixed into bricks with a volume of 21.27%. The equipment used in this research are chopper, stirrer, digital balance and compression test machine. In this study, the results of the III (composite) molded bricks decreased the compressive strength of 59% compared to mortar and cement bricks. The results of the compressive strength test in mold III (composite) were 47.76% higher than that in mold II on composite brick. Composite III bricks are classified as quality III, namely with solid type bricks that cannot get a large load.

Perancangan dan Uji Displacement Rangka Mobil Listrik Wijayakusuma Tipe Tubular Space Frame Material Baja ST37 Prabowo, Dian; Unggul, Unggul Satria Jati; Ulikaryani
Aptek Jurnal Apliksai Teknologi (APTEK): Volume 17, No. 01, Desember 2024
Publisher : Fakultas Teknik Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/aptek.v17i1.3022

Mobil listrik adalah kendaraan yang memanfaatkan energi listrik untuk bahan bakar utamanya, dan memiliki dampak positifnya yaitu tidak ada sisa hasil pembakaran yang dihasilkan yang akhirnya tidak menambah gangguan pencemaran udara. Hal yang paling utama untuk diperhatikan adalah rangka dimana rangka adalah tempat untuk menopangnya semua komponen yang berada diatasnya. Tujuan dalam penlitian ini adalah merancang desain rangka mobil listrik, menghitung kekuatan rangka dan menguji rangka dengan uji displacement. Hasil dari penilitian ini didapat bahwa desain mobil listrik type tubular space frame mendapat dimensi 2,05 x 0,85 x 1,1 meter. Untuk hasil perhitungan rangka bahwa rangka dapat digunakan dengan aman dimana tegangan ijin pada rangka tidak melebihi tegangan maksimal yaitu sebesar 388,561 Mpa dari 464 Mpa. Sedang uji displacement rangka mengalami defleksi sebesar 2 mm

Model Pengembangan Pelet Biomassa dari Sampah Daun dan Ranting untuk Mendukung Transisi Energi dan Pengelolaan Sampah Berkelanjutan di Cilacap Wardani, Nur Indah; Hestyani, Dewi; Prastya, Andika; Prabowo, Dian; Restian, Ahmad; Nugroho, Adi
Madani: Jurnal Ilmiah Multidisiplin Vol 3, No 7 (2025): Agustus 2025
Publisher : Penerbit Yayasan Daarul Huda Kruengmane

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.16990861

Indonesia faces dual challenges in the form of high dependence on coal and increased volumes of leaf and ranting organic waste. This study studied the development of biomass pellets from leaf litter and ranting as renewable energy (EBT) initiated by PT Building Solutions Indonesia (SBI) Cilacap together with Cilacap State Polytechnic. Analysis includes technical concepts, environmental impacts through a life cycle approach, as well as implementation potentials and challenges. Results show the use of biomass pellets can decrease net greenhouse gas and methane gas emissions from leaf burning and ranting by the community, as well as supporting the circular economy model. The main challenges include production energy consumption and particulate emission control. The concept is technically and ecologically feasible with optimization and policy support as a prerequisite for commercialization.

Simulasi Tegangan (Stress) Pada Komponen Rangka Mesin Uji Tarik Sealent Menggunakan Solidworks Prabowo, Dian; Satria Jati, Unggul; Ulikaryani, Ulikaryani; Hardini, Probo
Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i2.1947

A series of processes are carried out in order to obtain the desired product result. One of the processes carried out is testing the strength of polymers by means of tensile testing in this case testing of polymer-based sealants. The method used is the method of simulating frame loading on the tensile testing machine that has been made. The software used to assist the simulation process is SolidWorks. The simulation is carried out in static mode or a fixed loading (no movement or vibration). A stress Analysis Simulation is carried out to get the result of static loading in the form of Ïƒ (stress). Loading simulations on the frame of the tensile testing machine for the tensile testing of the sealant are carried out on the components of the frame with different loading variations. Frame components with upward loading are given an average load of 38.5 MPa. Meanwhile, the frame components with downward loading are given an average load of 6.169 MPa. The largest average stress obtained from each component is 0.326 N/mm2. this value does not exceed the yield strength of 235 N/mm2.

Inspeksi Sambungan Rangka Mobil Listrik Tipe Tubular Space Frame Menggunakan Las GMAW dengan Cairan Liquid Penetrant Satria Jati, Unggul; Prabowo, Dian; Dwi Hastuti, Hety; Van Gunawan, Leo
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2163

Technological developments increasingly require humans to increase their competence and innovation. The process of making frames for electric cars is one of the innovations to produce a strong frame. The frame is the main and important part of a vehicle, because the components and passengers will support the frame. The connection between frame components uses GMAW welding, which is the process of joining metal materials by heating them until they reach their melting point. To obtain a frame that meets the criteria, it is necessary to carry out a testing process, this testing process is NDT testing (Non Destructive Test), namely testing the physical part of the material in a way that does not damage the test object. Meanwhile, the aim of this research is to inspect the electric car frame so as to find discontinuities in the GMAW welding results. The results of this research were that there were 22 samples that underwent the liquid penetrant test process, of the total samples according to ASME Section VIII Division 1 Mandatory Appendix 6 there were 14 specimens that were acceptable while 8 needed improvement in the connection process. After the repair or repair process has been carried out, the frame is declared fit for use.

Pengaruh Variasi Pendinginan Terhadap Kekasaran Permukaan Hasil Proses Milling Pada Material Stainless Steel AISI 304 Jati, Unggul Satria; Prabowo, Dian; Hastuti, Hety Dwi
Infotekmesin Vol 15 No 2 (2024): Infotekmesin, Juli 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i2.2371

Machining processes in current developments are required to be more environmentally friendly, the use of coolant has a big impact on the environment. So air cooling media is an alternative that can be used to reduce production costs and implement environmentally friendly machining processes. This research aims to determine the level of surface roughness on AISI 304 Stainless Steel at depth of feed and cooling medium. There are two independent variables and a dependent variable. The dependent variable is cutting speed 63 mm/min and feed speed 950 mm/min, while the independent variable is variation. cooling media (room air, dromus, and cooled air) and variations in feeding depth (0.5, 0.75 and 1 mm. The results obtained from this test show the influence of variations in cooling media and depth of feed on the surface roughness of Stainless Steel AISI 304. The tools and materials used are Stainless Steel AISI 304, milling machine, dromus, cold air cooler, thermometer, pressure gauge, and tools. surface roughness tester. Tests obtained the greatest roughness results in the cooling medium using room air which showed a roughness level of 0.974 Î¼m with a cutting speed of 63 mm per min and a feed speed of 950 mm per min. Then the smallest level of roughness is in the cooling media using cold air, namely 0.296 Î¼m with a cutting speed of 63 mm per min and a feed speed of 950 mm per min.

Pengaruh Suhu Pemanas Pada Mesin Pengering Cocopeat Tipe Rotary Dryer Jati, Unggul Satria; Nur Akhlis Sarihidaya Laksana; Prabowo, Dian; Wardani, Nur Indah; Kurniyanto, Prastiyo; Fauzi, Bryan Dwi
Infotekmesin Vol 16 No 2 (2025): Infotekmesin: Juli 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i2.2833

The rotary dryer is a machine designed to simplify the cocopeat drying process. The current process still relies on sunlight; this drying process has the drawback of longer drying times and uncontrolled moisture content. The maximum moisture content of the cocopeat must be 15%. This research method is an experiment using several parameters: a drum speed of 6 rpm, heating temperatures of 600Â°C, 900Â°C, and 1300Â°C, with varying drying times of 120 and 150 minutes. The drying process at a temperature of 600 Â°C resulted in a decrease in humidity efficiency of up to 56.7% with a water content value of 23.8% in 150 minutes and a mass of 3.7 kg. Meanwhile, for drying at a temperature of 1300 Â°C, the best reduction in efficiency was obtained compared to the previous temperature, a decrease in water content of up to 84% with a water content value of 8.55 and a mass of 2.7 kg using a time of 150 minutes.

Pengaruh Penambahan Limbah Plastik Sebagai Alternatif Pengganti Bata Beton Dinding Rumah Prabowo, Dian; Hardini, Probo; Kurniawan, Ipung; Santoso, Agus
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i1.1513

The current handling of waste, especially styrofoam, plastic, used oil is not optimal, these wastes can be used to manufacture other products such as bricks with a simple process. If the waste is processed properly, it will get good economic value. To get a good value or product, it is necessary to do research or testing, as in this study, namely the use of styrofoam waste, plastic and used oil to be used as bricks. In this study, it is hoped that the public will understand and understand the quality of the types of composite bricks and ordinary types of bricks seen from their advantages and disadvantages. Styrofoam waste, plastic and used oil are mixed into bricks with a volume of 21.27%. The equipment used in this research are chopper, stirrer, digital balance and compression test machine. In this study, the results of the III (composite) molded bricks decreased the compressive strength of 59% compared to mortar and cement bricks. The results of the compressive strength test in mold III (composite) were 47.76% higher than that in mold II on composite brick. Composite III bricks are classified as quality III, namely with solid type bricks that cannot get a large load.

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