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All Journal Turbo : Jurnal Program Studi Teknik Mesin Accurate: Journal of Mechanical Engineering and Science Jurnal Mesin Nusantara Jurnal Pengabdian Mandiri
Dwi Handoko
Politeknik Negeri Pontianak
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IPTEK MESIN BETEL NUT HUSKER DI DESA SUNGAI KUPAH KECAMATAN SUNGAI KAKAP KABUPATEN KUBU RAYA Alban Naufal; Sutriyatna Sutriyatna; Ahmad Faizal; Dwi Handoko; Daryono Daryono; Masril Masril; Merry Lestari; Badar Khan; Najwa Dwi Nabila; Nita Natasya
JURNAL PENGABDIAN MANDIRI Vol. 1 No. 12: Desember 2022
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Karena banyaknya warga di Desa Sungai Kupah yang bekerja sebagai pengupas kulit pinang, dengan alat yang begitu sederhana dan cukup memakan waktu yang lama. Maka pada kegiatan pengabdian pada masyarakat kali ini kami berinovasi dengan membuat alat yang mampu mengupas kulit pinang (betel nut husker) dengan kapasitas 5 kilogram. Biasanya para warga akan mengunakan semacam alat potong berupa palu untuk mengupas kulit pinang tersebut. Ada kalanya kulit pinang itu berstruktur keras dan membutuhkan tenaga yang ekstra untuk mengupasnya. Kerja yang terlalu memakan waktu dan tenaga itu, sangat tidak efiseien dan buang buang waktu. Belum lagi dengan kecelakaan kerja yang dapat terjadi karena kurang fokus yang dapat mengakibatkan jari jari tangan dapat terluka. Dengan keadaan yang terluka tersebut, para warga akan bekerja kurang maksimal dan membutuhkan waktu yang lama.Maka dari itu, pembuatan alat pengupas pinang (betel nut husker) berkapasitas lima kilogram ini akan sangat membantu para warga untuk melakukan pekerjaan pengupasan kulit pinang. Dengan adanya alat pengupas pinang berkapasitas lima kilogram ini, para warga dapat menghemat waktu dan tenaga dan lebih mengefesiensikan pekerjaan mereka.
Analisa Variasi Putaran Friction Welding Terhadap Kekerasan Logam Aluminium Paduan Seri 1100-H18 Daryono; Dwi Handoko; Topan Prihantono; Ady Setiawan
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 2 (2022): October 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i2.1494

Abstract

Research in aluminum splicing continues to be improved, so that the joining process becomes easier and to increase hardness. Friction stir welding (FSW) aluminum joining process. The purpose of this study was to find out more clearly about the mechanical properties of the hardness of the specimen. The material used is aluminum alloy 1100-H18 series. The research method is friction welding with Vertical Milling as a turning tool. The tests were carried out in different rounds, namely; 660 rpm; 1115 rpm; 1750 rpm and 2720 rpm with a fixed tool feed rate of 20 mm/minute. The results of the Vickers test show that the hardness of the Base Metal (BM) area at 660 rpm is the highest at 101.4 and the lowest is 97.62 at 1115 rpm. The highest average hardness value of 94.98 occurs at 1115 rpm and the lowest is 75.18 at 2720 rpm. A significant effect on the hardness of the specimen due to the rotational speed of the tool spindle (electrode), the higher the rotation, the higher the heat generated and the rate of The slow cooling in the HAZ and SZ regions will be greater, as a result the hardness in the HAZ and SZ regions will decrease.
Analisa pengaruh temperatur pemanasan pada proses normalizing dan hardening quenching terhadap kekuatan tarik dan struktur mikro baut ST-60 Sutrisno Sutrisno; Azmal Azmal; Dwi Handoko
TURBO [Tulisan Riset Berbasis Online] Vol 10 No 2 (2021): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v10i2.1515

Abstract

This study aims to obtain information about the price of tensile, hardening, and changes in microstructure as well as changes in material properties at hot temperature variations 800 OC to 900 OC. The method used in this study is an experimental method, where the material used is ST-60 steel bolts, with a tensile test sample form referring to the ASTM D 638-03 standard, while for testing hardness and chemical composition based on machine standards, namely Ø16 mm x 20 mm. In this study, 5 samples were made at each temperature of 0 0C, 800 0C, 850 0C, 900 0C, 950 0C and 1000 0C with the type of heat treatment in the normalizing process and the hardening quenching process. This research was conducted in the Laboratorium Pengujian Bahan, Jurusan Teknik Mesin, Politeknik Negeri Pontianak. The test results on the normalizing process for tensile strength decreased by an average of 230.78 N/mm2 or 50%, Vickers hardness decreased by an average of 33.99 HV or 31% and the carbon content decreased by an average of 0.19 or 48% of the normalizing process is not done. Whereas in the hardening quenching process, the average tensile strength increased by 93.22 N/mm2 or 20 %, the Vickers hardness on average increased by 19.29 HV or 18 % and the average carbon content increased by 0.06 or up 17 % of the hardening quenching process was not done. So to overcome the decrease in mechanical strength and changes in the microstructure of the ST-60 bolt due to hot temperatures, the hardening quenching process can be applied, namely by polishing with used oil after the bolts work at hot temperatures.
Pengaruh Variasi Tekanan Pengepresan terhadap Karakteristik Briket Serbuk Arang Kayu dengan Perekat Limbah Nasi Tia Melati; Dwi Handoko
Jurnal Mesin Nusantara Vol 9 No 1 (2026): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v9i1.27023

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh variasi tekanan pengepresan terhadap karakteristik briket serbuk arang kayu dengan perekat limbah nasi. Penelitian dilakukan menggunakan metode eksperimen dengan tiga variasi tekanan pengepresan, yaitu 150 kg/cm², 160 kg/cm², dan 170 kg/cm². Karakteristik briket yang diuji meliputi kadar air, kadar abu, nilai kalor, dan kekuatan tekan, kemudian dibandingkan dengan persyaratan SNI 01-6235-2000. Hasil penelitian menunjukkan bahwa peningkatan tekanan pengepresan cenderung menurunkan kadar air dan meningkatkan kekuatan tekan briket. Kadar air terendah sebesar 8,79% dan kekuatan tekan tertinggi sebesar 9,03 kg/cm² diperoleh pada tekanan 170 kg/cm². Nilai kalor tertinggi sebesar 4808,48 cal/gram diperoleh pada tekanan 160 kg/cm², sedangkan kadar abu terendah sebesar 0,91% diperoleh pada tekanan 150 kg/cm². Hasil penelitian juga menunjukkan bahwa seluruh variasi tekanan telah memenuhi persyaratan SNI untuk kadar abu, namun belum memenuhi persyaratan kadar air dan nilai kalor. Berdasarkan hasil tersebut, dapat disimpulkan bahwa variasi tekanan pengepresan memengaruhi karakteristik briket serbuk arang kayu dengan perekat limbah nasi, meskipun masih diperlukan optimasi lebih lanjut untuk memperoleh kualitas briket yang memenuhi seluruh persyaratan SNI.
Co-Authors Ady Setiawan Ahmad Faizal Anton Topan, Anton Azmal Azmal Badar Khan Daryono Daryono Daryono Daryono Masril Masril Merry Lestari Najwa Dwi Nabila Naufal, Alban Nita Natasya Sutrisno Sutrisno Sutriyatna Sutriyatna Tia Melati