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Atmoko, Nugroho Tri
Sekolah Tinggi Teknologi Warga Surakarta
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ANALISIS PENGARUH ARUS PADA PENGELASAN BERTINGKAT (MULTILAYER WELDING) TERHADAP STRUKTUR MIKRO, KEKERASAN DAN KUAT TARIK SAMBUNGAN MATERIAL ASTM A106 Elkana Bilak Lopo; Moch Chamim; Nugroho Tri Atmoko; Margono Margono; Hendi Lilih Wijayanto
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.1210

Abstract

This aims of this study to determine the effect of multilayer welding on ASTM A106 type carbon steel pipe material on the characteristics of the microstructure, hardness and maximum tensile strength of the material. ASTM A106 type carbon steel pipe is used as a raw material for welding using the Shielded Metal Arc Welding (SMAW) method. Welding on material joints is carried out in three layers (multilayer welding), namely the root pass, hot pass, and capping layers. There are two variations of welding specimens carried out in this study, namely in specimen 1 the currents used were 60, 70 and 80 A while in specimen 2 the currents used were 70, 80 and 90 A. To determine the effect of current variations on each specimen carried out three include Vickers Testing, microstructure testing and tensile testing. The results show that the base metal area is dominated by the ferrite phase, which indicates that the area has low hardness while the weld shows more perlite phase than ferrite besides the grain size is smaller and denser; this indicates that the hardness level will increase when compared to base metal. The results of the hardness test for all variations of the specimen concluded that the highest hardness value was in the weld. From the tensile test, it can be concluded that specimen 2 has a greater tensile strength of 2.5% when compared to specimen 1.
Peningkatan Kesejahteraan UKM Mulyo Waras melalui Pelatihan Pembuatan Pakan Domba dengan Mesin Pencacah Semi-Otomatis: Improving The Welfare Of UKM Mulyo Waras By Training In Making Sheep Feed Using A Semi-Automatic Chopper Machine Karminto Karminto; Kaleb Priyanto; Martinus Heru Palmiyanto; Bambang Hari Priyambodo; Suhartoyo Suhartoyo; Nugroho Tritmoko
Jurnal Suara Pengabdian 45 Vol. 2 No. 2 (2023): Juni: Jurnal Suara Pengabdian 45
Publisher : LPPM Universitas 17 Agustus 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/pengabdian45.v2i2.762

Abstract

Wonogiri Regency, Central Java, is famous for its large number of residents who work as breeders, especially sheep/goat breeders. The feed for goats/sheep breeders in Wonogiri district is sourced from weeds. However, the enumeration was still done manually using a sickle, so the enumeration process was ineffective because it required more time and effort. Through this community service scheme, the process of making a machine for chopping weeds is carried out which will later be used as fodder for goats/sheep, especially in the Wonogiri area. The machine is driven by an electric motor and there is a chopping knife which is designed to be more effective. The results of this community service program show that the increase in sheep feed production increased from 200 kg/day before using the machine to 350 kg/day or an increase of up to 75% when compared to without the chopping machine.
Sosialisasi Pengolahan Limbah Organik Rumah Tangga Melalui Budidaya Magot di Desa Pandeyan, Kecamatan Grogol, Kabupaten Sukoharjo Nugroho Tri Atmoko; Edy Suryono; Tri Widodo Besar Riyadi; Natanael Teofilus Riyadi; Sang Alang Awan; Bagas Wicaksono; Fajar Yuniarta; Taufik Bagus Nugroho; Septian Putra Tegar Permata
Jurnal Suara Pengabdian 45 Vol. 2 No. 3 (2023): September: Jurnal Suara Pengabdian 45
Publisher : LPPM Universitas 17 Agustus 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/pengabdian45.v2i3.1059

Abstract

Organic waste is an environmental problem, especially in the villages of Pandeyan, Grogol, Sukoharjo, so there is a need to solve this problem through direct community activities. One solution is the socialization activity on organic waste processing through magot cultivation in Pandeyan village. With this socialization, it is hoped that the community will gain further understanding regarding magot cultivation as an effort to process household organic waste to make it more useful. The socialization activity was conducted at the Pandeyan village office on August 30, 2023. To measure the success of socializing organic waste processing through magot cultivation, an evaluation was carried out using a questionnaire method distributed to participants. From the questionnaire results, it was found that 88.9% of the total participants understood magot cultivation. Meanwhile, if you look at the potential of organic waste in each household participating in this socialization, it is possible to process it through magot cultivation. However, there is still a need for assistance and further understanding regarding magot cultivation because there is still a stigma that maggots have a maggot-like shape and are not suitable for cultivation.
EFEK LAJU PEMANASAN (HEATING RATE) TERHADAP DISTRIBUSI TEMPERATUR DAN KINERJA MODUL THERMOELECTRIC GENERATOR SP1848 SA Nugroho Tri Atmoko; Haikal Haikal; Bagus Radiant Utomo; Fatimah Nur Hidayah; Emanuel Budi Raharjo
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.v14i2.1327

Abstract

Thermoelectric Generator (TEG) is an energy conversion technology that converts heat energy into electrical. There are several factors that affect the performance of TEG, one of which is the heat source. This research will investigate the use of waste heat by varying the heating rate on the performance of TEG in generating electricity and the temperature distribution profile through experimental studies on a laboratory scale. The heating plate is used to heat the hot surface of the TEG. There are three variations of the heating rate used, namely: Low (0.355°C/min), Middle (0.933 °C/min) and High (1.558 °C/min). Temperature measurements were carried out on the hot surface (Th), the cold surface (Tc) of the TEG module, and the ambient temperature (Ta) using Arduino temperature data logger. Meanwhile, to measure the electrical output in the form of voltage (V) generated by the TEG module, using the Arduino voltage data logger. The results show when the heating rate used is high (high heating rate) then the average electrical output of the TEG module produces a voltage of 5.34V. The heating rate on the hot surface of the TEG module will affect the difference in surface temperature and the performance of the TEG module in generating electricity.  
Investigasi pembuatan mikropartikel carbon menggunakan mesin high energy ball milling (HEBM) model shaker mill Nugroho Tri Tri Atmoko; Bambang Margono; Fariyono Fariyono; Wahyu Purno Satrio
ROTASI Vol 25, No 3 (2023): VOLUME 25, NOMOR 3, JULI 2023
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.25.3.59-63

Abstract

The challenge of human civilization is to produce materials that will perform better in the future, so it is necessary to develop new materials. In this research, the process of making carbon particles will be carried out using the high-energy ball milling (HEBM) with shaker mill model. The effect of the shaker mill process on carbon particles for 120 hours on size and morphology will be analyzed through a series of tests. The research began by preparing carbon powder that had been ground and passed through mesh 200. The carbon particles that had passed through mesh 200 were pounded into steel balls (high energy ball milling) using the shaker mill model. A particle size analysis (PSA) test was carried out to measure the dimensions of the carbon particles. In contrast, a scanning electron microscopy (SEM) test was carried out to see the shape and morphology of the carbon particles. The results show that the carbon particles measured before the shaker mill process are 2526.03nm, while the dimensions of the carbon particles will decrease to 608.43 when the shaker is milled for 120 hours. Meanwhile, the shape and morphology of the carbon particles do not appear to be homogeneous. This indicates that the shaker mill process on carbon particles for 120 hours has not reached nano dimensions and is homogeneous.
PERBAIKAN KEKERASAN DAN STRUKTUR MIKRO LOGAM KUNINGAN SEBAGAI BAHAN PROPELLER DENGAN METODE SHOT PEENING Margono Margono; Yanti Pasmawati; Nugroho Tri Atmoko; Rizqi Ilmal Yaqin; Bambang Hari Priyambodo
Jurnal Teknologi Terapan Vol 9, No 2 (2023): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v9i2.431

Abstract

Brass metal is widely used as a supporting equipment material, one of which is a propeller. The propeller itself is one component of the boat that rotates and produces thrust energy. The continuous use of propellers results in degradation or a decrease in quality and service life. The degradation of the propeller is affected by the hardness, toughness, and corrosion resistance of the working environment. To improve the quality of the propeller, shot peening treatment was carried out on its surface. Shot peening is a continuous shooting process with fine particles in the form of steel balls on the surface of the object. Shot peening can increase the density of the microstructure and produce compressive residual stress which causes the surface hardness to also increase. Shot peening is carried out with variations in duration of 2, 4, 6, 8, and 10 minutes, 100 mm shooting range, and 7 Bar firing pressure. The steel ball particles used have a hardness of 40-50 HRC and a diameter of 5 mm. The results of the hardness test showed an increase in the surface hardness of the spesimens for a duration of 2, 4, 6, 8, and 10 minutes, respectively 189, 294, 302, 324, 330, dan 341 HV. The microstructure of the spesimen after shot peening looks tighter and denser. The highest hardness value is 341 HV or an increase of 80% compared to raw material.
Rancang Bangun Mesin Pencacah Rumput Untuk Peningkatan Efektivitas Konsumsi Pakan Ternak Di Sukoharjo Margono, Margono; Atmoko, Nugroho Tri; Priyambodo, Bambang Hari; Suhartoyo, Suhartoyo; Awan, Sang Alang
Abdi Masya Vol 1 No 2
Publisher : Pusat Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52561/abma.v1i2.132

Abstract

Kebutuhan akan rumput gajah untuk pakan ternak di desa Curidan, Sukoharjo terus meningkat, hal tersebut berbanding lurus dengan populasi sapi yang juga meningkat. Rumput harus disediakan peternak sebagai pakan utama ternak setiap harinya, akan tetapi tingkat efektivitas konsumsi pakan ternak masih kurang. Kebanyakan peternak masih menggunakan proses pencacah rumput secara konvensional. Sehingga apabila rumput dalam jumlah yang cukup banyak maka dibutuhkan waktu dan tenaga yang lebih banyak. Tujuan dilaksanakannya pengabdian masyarakat dengan menciptakan mesin tepat guna untuk membantu peran manusia dalam proses pencacah rumput dengan menggunakan mesin Pencacah. Mesin ini diharapkan mampu meningkatkan efektivitas dan efisiensi produksi pakan ternak. Hasil program menunjukkan bahwa rata-rata kapasitas produksi mengalami peningkatan sebesar 250% dari 200 kg/jam menjadi 500 kg/jam. Penggunaan mesin baru tetap bisa menjaga kualitas pada rumput  sebagai sumber protein. Singkatnya, program pengabdian masyarakat telah memberikan perubahan positif dalam hal peningkatan efektivitas proses pencacahan pakan ternak bagi peternak sapi di desa Curidan, Parangjoro, Grogol, Sukoharjo
PENINGKATAN KOMPETENSI GURU SMK DALAM BIDANG GAMBAR TEKNIK MELALUI PELATIHAN DESAIN Supriyanto, Agung; Jamaldi, Agus; Atmoko, Nugroho Tri
Abdi Masya Vol 1 No 4
Publisher : Pusat Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52561/abma.v1i4.184

Abstract

Kebijakan pemerintah melaui Kemeterian Pendidikan dan Kebudayaan senantiasa berupa untuk meningkatkan mutu pendidikan di sekolah kejuruan melaui program SMK Pusat Keunggulan. Untuk mendukung hal ini perlu upaya peningkatan kompetensi guru mata pelajaran. Dari diskusi dengan beberapa sekolah bahwa tidak semua sekolah memiliki guru dengan kompetensi bidang desain. Selaran dengan hal ini, telah dilakukan pelatihan kompetensi guru sekolah kejuruan dalam hal desain bidang keteknikan dengan menggunakan perangkat lunak Solidworks. Metode pelatihan dilakukan secara tatap muka dalam suatu kelas sehingga peserta bisa langsung praktek dengan didampingi oleh instruktur yang kompeten. Untuk mengukur ketercapaian hasil pelatihan, dilakukan pengukuran kompetensi guru di awal dan akhir pelatihan. Hasil pelatihan menunjukkan bahwa seluruh peserta mencapai ketuntasan belajar (ketuntasan 100%) dengan rata-rata ketercapain materi sebesar 88,9%.
Sosialisasi Pengolahan Limbah Organik Rumah Tangga Melalui Budidaya Magot di Desa Pandeyan, Kecamatan Grogol, Kabupaten Sukoharjo Tri Atmoko, Nugroho; Suryono, Edy; Besar Riyadi, Tri Widodo; Teofilus Riyadi, Natanael; Awan, Sang Alang; Wicaksono, Bagas; Yuniarta, Fajar; Bagus Nugroho, Taufik; Putra Tegar Permata, Septian
Jurnal Suara Pengabdian 45 Vol. 2 No. 3 (2023): September: Jurnal Suara Pengabdian 45
Publisher : LPPM Universitas 17 Agustus 1945 Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/pengabdian45.v2i3.1059

Abstract

Organic waste is an environmental problem, especially in the villages of Pandeyan, Grogol, Sukoharjo, so there is a need to solve this problem through direct community activities. One solution is the socialization activity on organic waste processing through magot cultivation in Pandeyan village. With this socialization, it is hoped that the community will gain further understanding regarding magot cultivation as an effort to process household organic waste to make it more useful. The socialization activity was conducted at the Pandeyan village office on August 30, 2023. To measure the success of socializing organic waste processing through magot cultivation, an evaluation was carried out using a questionnaire method distributed to participants. From the questionnaire results, it was found that 88.9% of the total participants understood magot cultivation. Meanwhile, if you look at the potential of organic waste in each household participating in this socialization, it is possible to process it through magot cultivation. However, there is still a need for assistance and further understanding regarding magot cultivation because there is still a stigma that maggots have a maggot-like shape and are not suitable for cultivation.
PENGARUH KONDUKTIVITAS PANAS DAN MEDIA PENDINGIN TERHADAP SUHU MAKSIMAL DAN LAJU PENDINGINAN PADA PROSES INDUCTION HEATING BAJA AISI 4140 DAN 4340 Haikal, Haikal; Kasih, Tota Pirdo; Atmoko, Nugroho Tri
Teknika Vol 10 No 1 (2025): April 2025
Publisher : Pusat Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52561/teknika.v10i1.390

Abstract

Pemanas induksi merupakan proses pemanasan modern yang bebas kontaminasi, bebas emisi sehingga pemanas induksi sangat dikembangkan dalam teknologi heat treatment. Penelitian ini berfokus pada pengaruh konduktivitas material baja AISI terhadap laju pemanasan, suhu maksimal serta laju pendinginan yang terukur ketika material uji dipanasi menggunakan mesin pemanas induksi (induction heating). Dua buah material AISI yakni AISI 4140 dan AISI 4340 digunakan dalam penelitian ini. Material AISI 4140 memiliki nilai konduktivitas termal 42,6 W/m.K dan AISI 4340 memiliki nilai konduktivitas termal 44,5 W/m.K. Material tersebut dipanaskan menggunakan pemanas induksi selama 15 menit kemudian didinginkan menggunakan media udara dan air. Pengukuran suhu dilakukan pada material memanfaatkan thermocouple yang dikombinasi dengan Arduino sehingga pengukuran suhu dapat direkam secara real time . Berdasarkan pengambilan data suhu pada spesimen ketika dipanaskan menggunakan pemanas induksi menunjukkan bahwa suhu maksimal yang terukur pada material uji yakni 747,75°C ketika material AISI 4140 akan tetapi jika menggunakan material AISI 4340 menghasilkan suhu maksimal yang lebih tinggi yakni 754,5°C. Sedangkan jika ditinjau dari laju pendinginan, laju pendinginan Baja AISI 4340 sebesar 0,14°C/s pada media pendingin udara dan 5,27°C/s pada media pendingin air. Sedangkan Baja AISI 4140 menghasilkan laju pendinginan 0,08°C/s pada media pendingin udara dan 4,75°C/s pada media pendingin air. Penurunan suhu rata-rata pada media pendingin udara antara Baja AISI 4140 dengan Baja AISI 4340 memiliki perbedaan sebesar 0,06°C/s dan pada media pendingin air memiliki perbedaan sebesar 0,52°C/s. Baja AISI 4340 lebih cepat membuang panas sedangkan Baja AISI 4140 lebih lama menyimpan panas. Hal tersebut mengindikasikan bahwa semakin besar konduktivitas panas suatu material maka semakin tinggi suhu yang terukur dan laju pendinginan semakin cepat.
Co-Authors Agung Supriyanto, Agung Agus Jamaldi Alfarizi, Tito Amarulloh Amarulloh Amiruddin Amiruddin Arif Hidayat Purwono Awan, Sang Alang Bagas Wicaksono Bagas Wicaksono, Bagas Bagus Nugroho, Taufik Bagus Radiant Utomo Bagus Radiant Utomo Bambang Hari Priyambodo Bambang Margono Burhanudin Burhanudin Chamim, Moch. David Setiadhi Denis Marchant EDI SARWONO Elkana Bilak Lopo Emanuel Budi Raharjo Fahlovi, Oldy Fajar Yuniarta Fariyono Fariyono Fatimah Nur Hidayah Ganjar Kurnia Haikal Haikal Haikal Hendi Lilih Wijayanto Hendra Setyawan, Hendra Jamaldi, Agus Kadex Widhy Wirakusuma Kadriadi Kadriadi Karminto Karminto Kasih, Tota Pirdo Margono Margono Margono Margono Martinus Heru Palmiyanto Natanael Teofilus Riyadi Priyanto, Kaleb Putra Tegar Permata, Septian Radik Syamsul Erfan Rizqi Ilmal Yaqin Sang Alang Awan Septian Putra Tegar Permata Subiyati Subiyati Suhartoyo Suhartoyo Suhartoyo Suhartoyo, Suhartoyo Suryono, Edy Taufik Bagus Nugroho Teofilus Riyadi, Natanael Titok, Febrian Tri Widodo Besar Riyadi Wahyu Purno Satrio Xiaomeng Zhu Yanti Pasmawati Yuniarta, Fajar