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All Journal TEKNIK Rekayasa Mesin Jurnal Rekayasa Mesin Jurnal Kesehatan Vokasional Jurnal Teknik Mesin Indonesia Infotekmesin Jurnal Engine: Energi, Manufaktur, dan Material Jurnal Mekanik Terapan Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses
Benidiktus Tulung Prayoga
Departemen Teknik Mesin Sekolah Vokasi Universitas Gadjah Mada, Indonesia
Aerospace Engineering Automotive Engineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health

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Development of Accuracy Evaluation Method for Open Loop Educational CNC Milling Machine Winarno, Agustinus; Lasiyah, Sus; Tulung Prayoga, Benidiktus; Aris Hendaryanto, Ignatius; Sukidjo, Fransiskus Xaverius
Jurnal Rekayasa Mesin Vol 12, No 1 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.01.23

Abstract

The open-loop educational computer numerical control (CNC) milling machine requires accuracy verification in order to ensure its accuracy and functionality. In this paper, the new verification method is proposed based on the length measurement using the fringe counting of He-Ne laser interferometry. The ideal translation length is defined by the number of electric pulses generated by the micro-stepping driver, while the actual length is measured using He-Ne laser interferometry. In the experimental process, the data of the fringe pattern of the He-Ne laser and the number of electric pulses which drive the stepper motors were simultaneously acquired using an oscilloscope. Hence, the data has been analyzed to obtain the ideal and actual lengths by using an in-house program developed in Python. By comparing the actual translation and ideal length, the accuracy of the educational CNC milling machine has been evaluated to be 50 µm for the length up to 200 mm.
Rancang Bangun Pompa Air Tenaga Angin Untuk Pengairan Sawah Menggunakan Vertical Wind Turbine Tipe Savonius Sugiyanto, B. Tulung Prayoga, Andhi Akhmad Ismail, (Politeknik Negeri Semarang)
Jurnal Rekayasa Mesin Vol 9, No 1 (2014): Volume 9, Nomor 1, April 2014
Publisher : Jurusan Teknik Mesin - Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.816 KB) | DOI: 10.32497/rm.v9i1.444

Abstract

Pompa air sangat efektif untuk  pengairan sawah terutama untuk daerah yang ketersediaan air tidak tercukupi sepanjang tahun, tetapi penggunakan pompa air juga mempunyai dampak ekonomi terhadap petani karena petani harus mengeluarkan biaya lebih untuk pembelian bahan bakar dan sewa pompa air tersebut. Sehingga diperlukan suatu alat yang dapat menjadi pompa air tanpa harus mengeluarkan biaya dalam penggunaannya. Di sisi lain, sawah sebagai salah satu lahan terbuka, memberikan perpindahan udara yang cukup untuk membantu terjadinya angin. Angin jika dimanfaatkan secara tepat bisa dijadikan sebagai energi  alternatif penggerak pompa air. Dari analisa lapangan didapatkan kondisi lahan pertanian terbuka di daerah itu mempunyai laju kecepatan angin yang termasuk kategori rendah, yaitu berkisar 2 – 3 m/detik. Dengan kondisi ini memerlukan perancangan turbin angin  yang mampu bekerja pada kondisi kecepatan angin yang rendah. Maka pemilihan turbin angin vertikal (VAWT) menjadi alternative terbaik. Tipe VAWT yang dipakai adalah tipe Savonius banyak tingkat untuk memungkinkan mendapatkan torsi yang tinggi. Pompa air tenaga angin dengan mekanisme pompa tali seal karet dapat digunakan untuk membantu sistem  pengairan  sawah.  Hasil pengujian skala laboratorium dengan bantuan blower sebagai sumber energi angin adalah pada putaran turbin 30.8 rpm dan putaran poros output 55 rpm debit yang dihasilkan 2,6 liter/menit. Pada putaran turbin 39 rpm dan putaran poros output 68 rpm debit yang dihasilkan 3,4 liter/menit. Sedangkan pada putaran turbin 39.5 rpm dan putaran poros output 71,7 rpm debit yang dihasilkan 4,2 liter/menit.Keywords : “Pompa Air Tenaga Angin”, “Vertical Axis Wind Turbine”, “Rotor Savonius”, “Pengairan Sawah”
Perbandingan Sifat Keausan UHMWPE Terhadap Commercially Pure Titanium (CP-Ti) Dan Stainless Steel 316L Untuk Aplikasi Sendi Lutut Buatan Benidiktus Tulung Prayoga; Rini Dharmastiti; Suyitno Suyitno; Arfan Fadilah
Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses Vol 1, No 1 (2015)
Publisher : Departemen Teknik Mesin, Sekolah Vokasi, Universitas Gadjah Mada.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (128.793 KB) | DOI: 10.22146/jmtp.v1i1.12264

Abstract

Titanium dan stainless steel 316L telah banyak dipakai sebagai material implan karena sifat tahan korosi, kekuatan dan biokompabilitas yang baik. Permasalahan utama pada implan persendian adalah keausan dari implan tersebut. Penelitian ini bertujuan untuk mengetahui sifat keausan UHMWPEterhadap dan commerciall pure titanium (CP-Ti) dan stainless steel 316L untuk aplikasi sendi lutut buatan.Pada penelitian ini uji keausan yang digunakan adalah metode reciprocating pin on flat (RPOF) sesuai dengan ASTM F732-00. Pin UHMWPE digesekkan pada plat yang bergerak bolak-balik di bawah pin. Durasi pengujian selama  20 x 105 siklus dan pengambilan data kehilangan aus diambil pada durasi setiap 250.000 siklus menggunakan timbangan dengan ketelitian 0,001 gram.Hasil penelitian ini menyatakan bahwa kekerasan 316 L lebih tinggi dibandingkan material CP-Ti. Bahan 316 L lebih tahan goresan dibandingkan material CP-Ti. Material UHMWPE yang berpasangan dengan stainless steel 316L memiliki ketahanan aus yang lebih baik dibandingkan dengan material UHMWPE yang berpasangan dengan CP-Ti. Lapisan oksida pada CP-Ti mudah terlepas sehingga keausan meningkat. Mekanisme keausan yang terjadi adalah keausan adesif dan abrasif.
Hubungan Antara Produktifitas Pemesinan dan Kualitas Permukaan Bahan UHMWPE Hasil Bubut Silindris dengan Mesin CNC Budi Basuki; Ignatius Aris Hendaryanto; Benidiktus Tulung Prayoga; Handoko Handoko
Jurnal Engine: Energi, Manufaktur, dan Material Vol 7, No 1 (2023)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v7i1.1461

Abstract

UHMWPE (Ultra High Molecular Weight Polyethylene) is a unique polyethylene material widely used in biomedical applications as a bearing material for human body joint implants. The production of these UHMWPE implant components is still commonly performed with machine tools. Operation of these machines requires specific setting machining parameters in order to produce good UHMWPE surface quality without sacrificing the production cost. This research aims to find the relationship between cylindrical lathe machining productivity parameter, MRR (Material Removal Rate), and surface quality of the produced UHMWPE implant. MRR is directly related to production costs. The research was conducted by turning the UHMWPE at five feed rate variations between 0.025 to 0.2 mm/rev. and two depth of cut variations, 0.05 mm, and 0.1 mm, with a cutting speed of 150 m / minute. The test used a Denford FANUC CNC lathe machine with a cemented carbide cutting tool. Product quality was determined by measuring the topography or surface roughness of the material. Results show that the surface quality is inversely related to MRR. This problem can be solved by adjusting the depth of the cut. High productivity can be obtained by cutting thicker material. The difference in the surface quality of the cylindrical lathe machined material in the two depth of cut variations is not significant.
Pengaruh Variasi Temperatur Solution Treatment pada Kekerasan dan Presipitat Paduan Co-30Cr-5Mo-0,32C-0,23N Fendy Rokhmanto; Malau Daniel Panghihutan; Ariani Pradhita Putri; Benidiktus Tulung Prayoga; Ika Kartika; Aprilia Erryani; Made Subekti Dwijaya; Galih Senopati; Albertus Deny Heri Setyawan; Cahya Sutowo
TEKNIK Vol. 44, No. 1 (2023): May 2023
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v44i1.49496

Abstract

Paduan kobal banyak digunakan sebagai material implan orthopaedi karena faktor biokompatibilitas material, ketahanan korosi, sifat mekanis yang baik, dan juga sifat mampu bentuknya. Pada penelitian ini nilai kekerasan dimodifikasi melalui proses heat treatment. Proses heat treatment diharapkan dapat menurunkan nilai kekerasan paduan. Paduan Co-30Cr-5Mo-0.32C-0.23N hasil coran dihomogenisasi pada temperatur 1200 ºC selama 12 jam dalam atmosfer argon. Kemudian paduan di-hot roll dengan preheat selama 1 jam pada temperatur 1250 ºC. Lalu dilakukan proses solution treatment dengan variasi temperatur 1200, 1250, 1300 ºC, selama 30 menit dalam atmosfer argon kemudian di-quenching. Karakterisasi paduan dengan pengamatan metalografi, SEM dan kekerasan memakai metode Vickers. Berdasarkan analisis dapat disimpulkan bahwa nilai kekerasan turun dan morfologi presipitat berubah dari starlike-dense pada kondisi setelah roll menjadi starlike-stripes pada kondisi setelah solution treatment dengan temperatur 1250 ºC, serta jenis presipitat dari M23X6 pada kondisi as cast menjadi M7X3 pada kondisi setelah solution treatment. Demikian halnya dengan nilai kekerasan, turun hingga 392,5 HV pada kondisi solution treatment dengan temperatur 1250 ºC
KINERJA SISTEM PENYAPU TIPE GUTTER BROOMS PADA PROTOTIPE KENDARAAN PENYAPU JALAN Aditya Bayu Pratama; Sugiyanto Sugiyanto; Radhian Krisnaputra; Benidiktus Tulung Prayoga; Yosephus Ardean Kurnianto Prayitno; Isworo Djati
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.v14i2.1288

Abstract

The performance of the gutter brooms sweeping system was studied by conducting an experimental sweeping test. The test is carried out by operating a sweeper system to sweep plastic, paper, and leaf waste. The test results show that at a broom rotation speed of 150,6 rpm, the sweeping of plastic obtained a 100% sweeping success rate with the three settings for the height of the broom, while the sweeping of leaf waste obtained a 100% sweeping success rate at the broom position ± 0 mm touching the road surface and the sweeping of paper waste obtained a 100% sweeping success rate at the broom position ± 15 mm pressing the road surface. The comprehensive system of the gutter brooms type of road sweeper vehicle prototype can show sweeping performance with a 100% success rate, although the success rate of the sweeping is uncertain for different sweeping situations.
Efektivitas Alat Extraoral Suction Unit pada Layanan Kesehatan Gigi dan Mulut Benidiktus Tulung Prayoga; Agustinus Winarno; Margareta Rinastiti; Dian Permata Sari; Heribertus Dedy Kusuma Yulianto; Julita Hendrartini
Jurnal Kesehatan Vokasional Vol 8, No 4 (2023): November
Publisher : Sekolah Vokasi Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jkesvo.86573

Abstract

Latar   Belakang: Petugas layanan kesehatan gigi dan mulut rentan terpapar infeksi berbagai penyakit dari pasien. Rongga mulut penuh dengan bakteri. Droplets dan aerosol dari cairan mulut pasien dapat menjadi media penularan penyakit. Extraoral suction unit (EOSU) dibutuhkan untuk membantu mengendalikan sebaran aerosol selama layanan kesehatan gigi.Tujuan: Penelitian ini bertujuan untuk membandingkan unjuk kerja extra oral suction unit lokal dengan produk komersial sebagai pembanding.Metode: Desain penelitian ini menggunakan metode deskriptif observasional dengan rancangan cross sectional. Sampel penelitian berupa alat penyedot aerosol hasil rancangan tim peneliti Universitas Gadjah Mada Merk D yang dibandingkan dengan dua produk komersial dari luar negeri Merk A dan B, satu alat produk dalam negeri Merk C. EOSU diuji di klinik gigi dengan prosedur serupa layanan sesungguhnya. Pengujian yang dilakukan adalah mengukur kapasitas hisap, tingkat kebisingan, sebaran aerosol dan angka kuman.Hasil: Extraoral suction unit produk buatan luar negeri (Merk A) menunjukkan unjuk kerja yang paling baik karena sebaran aerosol di sekitar lokasi kerja paling sedikit. Produk Merk D mempunyai unjuk kerja di bawah produk Merk A namun masih lebih baik dibanding produk buatan luar negeri lainnya (Merk B) dan produk dalam negeri lain (Merk C)Kesimpulan: Extraoral suction unit lokal mempunyai kapasitas serupa dengan produk komersial dan menjanjikan untuk diproduksi massal.
Pembuatan dan Analisa Performa Tekanan dan RPM Pada Komponen Swing Hidrolik Di Alat Peraga Mini Excavator Aji, Angga Prasetio; Prayoga, Benidiktus Tulung; Winarto, Felixtianus Eko Wismo; Prihadianto, Braam Delfian; Bahari, Galuh
Jurnal Engine: Energi, Manufaktur, dan Material Vol. 8 No. 1 (2024)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v8i1.1683

Abstract

The Vocational School Education is a university-level higher education program that places greater emphasis on practical fieldwork relevant to industry needs rather than academic theoretical knowledge. In Indonesia, vocational school programs or diplomas play a crucial role in the development and scientific research. The creation of a mini excavator model is a research and innovation project aimed at supporting students' practical training activities. The development of hydraulic swing components is used to enhance the components of the mini excavator model, which will later be expanded for educational purposes in the hydraulic drive system. The ultimate goal of this research is to manufacture hydraulic swing components that will be installed in the mini excavator model, with the final objective being to determine the pressure and rpm performance of these hydraulic swing components. Based on the conducted research, operating the mini excavator model requires a radius dimension or distance from the center point to the warning line of 3 m², and the maximum pressure for the mini excavator model is 150 kgf/cm², resulting in 11.17 rpm. Meanwhile, the allowable pressure for operating the hydraulic swing components in the mini excavator model is 100 kgf/cm², resulting in 8.54.
Analisis Pengaruh Temperatur dan Durasi Preheat terhadap Cacat Produk pada Mesin Injection Molding Manual Apriawan Nur Huda; Ignatius Aris Hendaryanto; Benidiktus Tulung Prayoga; Agustinus Winarno
Jurnal Engine: Energi, Manufaktur, dan Material Vol. 8 No. 2 (2024)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v8i2.1867

Abstract

Plastic objects are widely used and found in all places, from food packaging, household appliances, and electronic devices to vehicles. Generally, plastic is used as a substitute for glass, wood, and metal. Over time, the use of plastic has become an environmental issue. To address the problem of plastic waste, the government has introduced the 3R (Reduce, Reuse, and Recycle) initiative. One of the easily used tools in the recycling process is the injection molding machine. This process often results in product defects such as Short Shot, Flow Mark, and Sink Mark. The temperature in the injection process affects the melting point of the plastic and can influence various aspects of the manufacturing process and the final quality of plastic products. The heating duration affects the viscosity of the plastic material to be injected. The research conducted is experimental, and several tests were performed to determine the effect of temperature variation and preheat duration of the injection molding machine on product quality. Simulation results show that the higher the temperature used, the greater the resulting sink marks. The test results indicate that improper temperature and preheat duration usage will affect the occurrence of product defects. A temperature that is too low can result in high pressure during the injection process, preventing the material from filling the cavity maximally. Preheat duration and temperature are critical factors in the plastic manufacturing process, affecting melting points, flow quality, dimensional stability, and the mechanical properties of the final product. Proper control of heating duration, temperature, and other process conditions is essential to produce high-quality, defect-free plastic products. Keywords: Injection Molding, Preheat, Temperature
Evaluasi Efisensi Riser Untuk Bentuk Riser Samping yang Berbeda Menggunakan Metode Simulasi Casting Galuh Bahari; Benidiktus Tulung Prayoga
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.v14i2.1930

Abstract

As the solidification reaches the hot spot area, no molten metal remains and shrinkage is formed. To anticipate the shrinkage, a riser is added to the casting system. An optimal riser design would produce free shrinkage components. One of the factors that affect riser efficiency is the riser shape. This study aims to find the most efficient side riser shape by using simulation software. The riser shape of tubes, tubes with a half sphere on top, hemispheres, conical tubes, tubes with an oval cross-section, and cubes are used in this experiment, with the volume of all risers kept constant. The most efficient shape of the riser is the tube. The tube riser produces a larger modulus. The tube riser generated directional solidification. The same pattern can be seen in the niyama criteria and solidification temperature, where the tube riser has a more continuous pattern compared to other riser shapes.
Co-Authors A.A. Ketut Agung Cahyawan W Aditya Bayu Pratama Agustinus Winarno Agustinus Winarno Aji, Angga Prasetio Albertus Deny Heri Setyawan Apriawan Nur Huda Aprilia Erryani Arfan Fadilah Ariani Pradhita Putri Bahari, Galuh Budi Basuki Cahya Sutowo Dian Permata Sari Fadilah, Arfan Felixtianus Eko Wismo Winarto Fendy Rokhmanto Galih Senopati Galuh Bahari Handoko, Handoko Heribertus Dedy Kusuma Yulianto Ignatius Aris Hendaryanto Ika Kartika Isworo Djati Julita Hendrartini Kusuma, Samuel Surya Lasiyah, Sus Made Subekti Dwijaya Malau Daniel Panghihutan Margareta Rinastiti Pramudita Januarki Prihadianto, Braam Delfian Radhian Krisnaputra Rini Dharmastiti Sugiyanto Sugiyanto Sukidjo . Suyitno Suyitno Widia Setiawan Winarno, Agustinus Yosephus Ardean Kurnianto Prayitno