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Piston: Journal of Technical Engineering
Published by Universitas Pamulang
ISSN : 25413511     EISSN : 26862247     DOI : http://dx.doi.org/10.32493/pjte.v5i2.19158
Core Subject : Engineering,
Aerospace Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Ansor Salim Siregar, Mulyadi Mulyadi, Syaiful Arief Analisis Kegagalan Laminasi Komposit Epoksi/Serat Karbon Pada Sayap Pesawat Tanpa Awak DOI: 10.32493/pjte.v5i2.18596 Parlindungan Pandapotan Marpaung, Herbert H. Rajagukguk Energi Mekanik Penggerak Poros Magnet Rotor Alternator untuk Pembangkit Listrik AC DOI: 10.32493/pjte.v5i2.19158
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 7 Documents
 1 
Search results for , issue "Vol 7, No 1 (2023)" : 7 Documents clear
Studi Perlakuan Panas Terhadap Sifat Kekerasan Pada Baja ST 60 Albert Daniel Saragih; Silviana Simbolon; Sutiana Sutiana
Piston: Journal of Technical Engineering Vol 7, No 1 (2023)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v7i1.28872

Abstract

Pada penelitian ini telah berhasil dilakukan pengaruh perlakuan panas terhadap nilai kekerasan material. Adapun perlakuan panas yang dilakukan adalah proses annealing, normalizing, quenching dan tempering. Pengaruh holding time terhadap sifat kekerasannya juga akan dibahas pada penelitian ini dengan menggunakan sampel baja ST 60. Spesimen dipersiapkan dengan dipanaskan pada furnace pada temperatur austenesasi 850 oC dengan holding time selama 15 menit dan 30 menit. Nilai kekerasan pada sampel tanpa perlakuan baja st 60 memiliki rata-rata nilai sebesar 41 HRC. Pada suhu penahanan selama 15 menit  diperoleh nilai kekerasan rata-rata sebesar 27 dan 34 HRC untuk annealing dan normalizing serta 48, 65 dan 69 HRC untuk masing-masing quenching oli, air garam dan air.Selanjutnya pada proses tempering diperoleh data sebesar 66 HRC setelah proses quenching dilakukan. Sedangkan pada Pada suhu penahanan selama 30 menit  diperoleh nilai kekerasan rata-rata sebesar 13 dan 27 HRC untuk annealing dan normalizing serta 53 dan 72 HRC untuk masing-masing quenching oli dan air. Prinsip pendinginan lambat dan pendinginan cepat serta pemanasan kembali oleh proses tempering mencirikan data yang telah diperoleh pada penelitian ini. Namun pada pengaruh waktu penahanan/holding time terdapat perbedaan nilai kekerasan pada proses pendingan lambat dan pendinginan cepat. Permasalahan ini dapat dipecahkan dengan melakukan penelitian lanjutan yaitu menganalisa struktur mikro dari masing-masing proses perlakuan panas serta pengujian mekanik lainnya seperti uji impak atau ketangguhan.
Karakteristik Penyebaran Temperatur Pada Blower Lobe Kembar Type NRB-4 Karena Pembebanan Menggunakan Metode Termografi Geri Ryan Ramdhani; Prasetyo Prasetyo; Parno Raharjo
Piston: Journal of Technical Engineering Vol 7, No 1 (2023)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v7i1.31940

Abstract

Kompresor blower lobe kembar merupakan salah satu jenis kompresor positive displacement. Gangguan atau kerusakan pada kompresor blower lobe kembar dapat diuji dengan menggunakan termografi. Objek yang digunakan adalah blower lobe kembar dengan spesifikasi daya 3,75 kWatt, putaran 1640 rpm, tekanan 0,1 bar, supply tegangan 3 fasa, dan debit 8 m3 /min. Pengambilan data menggunakan thermocam Flir i5. Pengujian dilakukan putaran tetap sebesar 30 Hz (1800 rpm) dengan variasi pembebanan pada katup buang (fully open, 20º, 40º). Waktu pemindaian pada operasi 30, 45, 60, 75, 90, 105, dan 120 menit. Titik pengukuran pada motor body, pulley driver, rotor, bearing non drive end, compressor body, bearing drive end, pulley driven. Analisanya menggunakan metode trending dan descriptive. Hasil yang didapat pada pengujian karakeristik penyebaran temperatur pada blower lobe kembar menunjukkan temperatur tertinggi terjadi pada pulley driver dengan rentang kenaikan 3 - 15 ºC, pulley driven dengan rentang kenaikan 2 – 13 ºC, bearing compressor non drive end 2 dengan rentang kenaikan 3 – 14 ºC, rotor 2 dengan rentang kenaikan 4 - 12 ºC, rotor 1 dengan rentang kenaikan 4 - 12 ºC, bearing compressor non drive end 1 dengan rentang kenaikan 3 - 11 ºC, bearing compressor drive end 2 dengan rentang kenaikan 3 - 6 ºC, motor body dengan rentang kenaikan 2 - 8 ºC, bearing compressor drive end 1 dengan rentang kenaikan 2 - 8 ºC, compressor body dengan rentang kenaikan 2 - 6 ºC. Kenaikan temperatur dipengaruhi oleh waktu operasi, putaran motor, dan pembebanan pada katup buang. Semakin lama waktu operasi, semakin besar putaran motor dan pembebanan pada katup buang, maka semakin besar pula kenaikan temperatur yang terjadi.
Automatic Plant Watering System Using Arduino Uno and L298N DC Motor, (Study Case " Calathea"). Frengki Simatupang
Piston: Journal of Technical Engineering Vol 7, No 1 (2023)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v7i1.30057

Abstract

Abstrak: Perkembangan teknologi dalam sektor pertanian membuat para petani harus mampu beradaptasi dengan teknologi yang dapat digunakan untuk membantu pekerjaan menjadi lebih efektif dan efisien. Perkembangan teknologi yang dimaksud salah satunya menggantikan system manual menjadi system otomatisasi. Contoh system otomatisasi yang dapat dipakai oleh petani adalah penyiram tanaman. Namun Saat ini masih banyak petani melakukan penyiraman tanaman secara manual manual, yaitu petani harus selalu melihat tanaman untuk melakukan penyiraman langsung. Hal ini sering dianggap kurang efisien dan efektif karena petani tidak punya cukup waktu untuk menyiram tanaman, serta kurang mengetahui berapa banyak air yang dibutuhkan oleh tanaman. Jika Tanaman tidak disiram tepat waktu dapat dipastikan tanaman menjadi layu dan akhirnya tanaman bisa mati. Berdasarkan permasalahan yang terjadi, penulis mengembangkan sebuah sistem otomatisasi yang dapat membantu petani melakukan penyiraman tanaman secara otomatis. Pada sistem otomatisasi yang dibangun menggunakan Mikrokontroller Arduino Uno sebagai pengontrol utama, Sensor kelembaban tanah Capasitive Soil Moisture sebagai sensor untuk mengetahui kelembaban tanah. Motor DC L298N akan digunakan untuk mengatur Pompa mini DC untuk mengalirkan air ke tanaman berdasarkan hasil pembacaan dari sensor kelembaban. LCD I2C sebagai monitor untuk melihat hasil pembacaan sensor kelembaban. Setelah pengembangan sistem otomatisasi ini diharapkan dapat berjalan dengan baik dan digunakan petani untuk melakukan penyiraman tanaman mereka sehingga tanaman dapat dipantau pertumbuhannya
Analysis of Physical and Mechanical Propoerties of Composite Board Made From Bamboo Fiber and Polyester Resin Silviana Simbolon; Sulanjari Sulanjari; Ihat Solihat
Piston: Journal of Technical Engineering Vol 7, No 1 (2023)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v7i1.33160

Abstract

The study was conducted to determine the characteristics of bamboo fiber reinforced composite materials. Composite samples were made with fiber composition in percent weight, namely 20%, 30%, 40% and as a matrix material using polyester resin. Then the bamboo fiber and matrix are mixed according to the composition and stirred manually until evenly distributed. Furthermore, the mixture of raw materials is poured into a mold and then left for 60 minutes, then the sample is released from the mold and cut into pieces according to the shape of the test specimen. The dried sample is tested which includes density test and compressive strength test. From the test results obtained that The mixing composition has a significant effect on the density and compressive strength of the composites. The density and compressive strength values in the composite with 20% bamboo fiber were 1.55 g/cm3 and 270 kgf/cm2 , while the sample with the composition of 30% bamboo fiber obtained density values of 1.48 g/cm3 and compressive strength of 274 kgf / cm2 . A sample with 40% bamboo fiber has density and compressive strength of 1.24 g/cm3 and 284 kgf/cm2 . The results of the sound absorbance test on bamboo fiber show that the percentage of sound absorption increases linearly as shown in the graph.
Analisis Kualitas Udara Goa Seribu Banuarea Istas Pratomo Manalu; Gerry Italiano Wowiling; Sari Muthia Silalahi; Marojahan Mula Sigiro; Eka Stephani Sinambela; Andriono Manalu
Piston: Journal of Technical Engineering Vol 7, No 1 (2023)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v7i1.30159

Abstract

One of the technological advances that are starting to be applied in various fields is data transmission. Data transmission sends messages from one point to another to get or exchange information. To perform the data transmission, technology and tools are needed which can support the process. The technology that supports the data transmission system is the Wireless Sensor Network. The tool that supports the data transmission is LoRa. LoRa is a module that is able to support data transmission systems with a fairly long distance range. In this study, LoRa testing was carried out using several distances, namely 100 meters, 200 meters, 300 meters, 400 meters to get the RSSI and SNR values. The purpose of determining the RSSI and SNR is to find out how LoRa's performance is in sending data in the agricultural sector. The tests carried out are still in agricultural areas which are still in the category of many obstacles and a lot of noise. So that in the tests carried out LoRa can still be used to send data, it's just that the farther the transceiver is to the receiver, the more data will be lost. At a distance of 100 meters, 10 data are received. At a distance of 200 meters there are 9 data, at a distance of 300 meters there are 7 data and at a distance of 400 meters 3 data are received.
Analysis Crystal Structure and Magnetic Properties of Strontium Ferrite (SrO6Fe2O3) Made Using Powder Metallurg Hery Adrial; Djuhana Djuhana; Mulyadi Mulyadi; Sunardi Sunardi
Piston: Journal of Technical Engineering Vol 7, No 1 (2023)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v7i1.33184

Abstract

Strontium ferrite in this study was obtained from a mixture of strontium carbonate and pure iron sand using the metarlurgi powder method. Variation in the composition of the composition of 1: 5 mol, 1: 6 mol, 1: 7 mol with a total mass of 30 grams, both of raw materials were milled by using a rotary ball mill with an additional 125 ml of distilled water for 6 hours. Then dried using the oven to become powder again. After that the sample was calcined by using a furnace at temperatures about 1000 ℃ and hold for 2 hours The sample was measured by using X-Ray Difraction (XRD) test to determine the crystal structure and the Vibrating Sample Magnetometer (VSM) test to determine the magnetic properties. Samples with a stoichiometric composition with mole ratio SrO: Fe2O3 = 1: 6 have the highest magnetic properties, namely with a remanence value = 48 emu / g or 0.3 Tesla and a coercivity of 2500 Oe. As well as the crystal structure obtained single phase SrO6Fe2O3 (SrFe12O19).
Analysis of Mechanical and Magnetic Properties of Rubber Magnet Composite Made From NdFeB Magnetic Particlesand Silicon Rubber Edi Tri Astuti; Mulyadi Mulyadi; Sunardi Sunardi; Joko Setiyono
Piston: Journal of Technical Engineering Vol 7, No 1 (2023)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v7i1.33360

Abstract

This study conducted the manufacture of permanent magnet composite based on NdFeB magnetic powder and polymer adhesives, the purpose of this study was to determine the effect of the composition of the mixing of raw materials on mechanical properties and magnetic properties. Neodymium Iron Boron (NdFeB) composite was made by mixing of NdFeB magnetic powder and binder of silicon rubber (SR) in form liquid. The percentage of silicon rubber was varried of 5 %, 10%, 20 % and 30% by volume. Both raw materials were mixed until homogeneous and poured into the mold and allowed to dry at room temperature.The formed samples were characterized which includes the measurement of tensile strength and magnetic properties . The characterization results show that the sample with 20 % and 30 % SR has good flexibilty and other samples are rigid or not flexible. The variation in the composition of silicon rubber has a significant effect on mechanical properties and magnetic properties, especially remanence. The characteristic of flexible rubber magnet with a composition of 20% and 30% silicon rubber is that it has a tensile strength of 9.31 - 11.46 N / mm2 with an elongation of 17.55-26.74% and a hardness of 38-42 HA. While the magnetic properties achieved are magnetic field strength = 430-500 Gauss, remanence = 30-35 emu / g and coercivity of 2000 Oe

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