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All Journal Jurnal Teknologi Terapan Jurnal ABDINUS : Jurnal Pengabdian Nusantara JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) Madaniya METAL : Jurnal Sistem Mekanik dan Termal
Otto Purnawarman
Politeknik Manufaktur Bandung
Religion Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Perancangan Mesin Pengaduk (Mixer) Bahan Silase sebagai Pakan Ternak Kapasitas 200 Kg/15 Menit untuk Peternakan SapiBos Farm di Sumedang Riky Adhiharto; Aini Fadhlih Hanifah; Otto Purnawarman
Madaniya Vol. 4 No. 4 (2023)
Publisher : Pusat Studi Bahasa dan Publikasi Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53696/27214834.671

Abstract

Dalam memenuhi kebutuhan pangan yang semakin meningkat, sektor peternakan sapi memiliki peran pada penyediaan jumlah ternaknya. Pakan ternak merupakan salah satu faktor penting yang perlu diperhatikan. Umumnya pakan sapi berupa hijauan dan konsentrat. Akan tetapi terdapat teknologi pakan seperti pembuatan silase untuk kebutuhan persediaan ketika musim kemarau tiba. Dalam membuat silase dibutuhkan proses pengadukan. SapiBos Farm merupakan salah satu peternakan yang mengolah silase untuk ketersediaan pakan ternaknya. Mesin existing yang digunakan mengalami masalah pada bagian poros pengaduk yang slip dan pintu pengeluaran hasil campuran pun tersendat. Oleh karena itu, ditawarkan sebuah solusi rancangan mesin pengaduk bahan silase yang dilakukan dengan metode perancangan VDI2222. Dalam perancangannya, dilakukan kontrol kekuatan poros, rantai sebagai transmisi, dan kekuatan penampung melalui CAE Solidworks. Mesin memiliki dimensi terluar 1277 mm x 1764 mm x 2021 mm menggunakan motor 1 fasa 0,12 kW sebagai sumber penggeraknya dan kapasitas penampung 543 liter serta massa mesin yaitu 554 kg.
Redesign of Cover Lower Dies on Compaction Tool in Sealface Manufacturing Based on Powder Metallurgy Process Riona Ihsan Media; Otto Purnawarman; Hanif Azis Budiarto; Daffa Caesario
METAL: Jurnal Sistem Mekanik dan Termal Vol 8, No 1 (2024): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.8.1.25-38.2024

Abstract

The cover lower dies constitute a vital component of the ejector compaction tool system employed in the powder metallurgy process for sealface production. However, a failure occurred in the compaction process, leading to the deformation of the component after the production of more than eleven sealfaces. This study investigates the ejector compaction tool system, with a specific focus on the cover lower dies, aiming to optimize the tool's construction. Employing the Pahl & Beitz design methodology, the research encompasses discussions with previous researchers, observation of existing tools, disassembly of current tools, and simulation analysis. Emphasizing static analysis to assess stress, deflection, and safety factor values, the research aims for a safety factor exceeding 2.00 in the redesigned cover lower dies. The optimal solution involves changing the material to AISI D2 with a hardness of 62 HRC, modifying the cover lower dies thickness by 13mm, and increasing springs and retained pins from 2 to 4 pieces. Consequently, the redesigned ejector compaction tool system is deemed operationally safe, signifying a successful improvement in its construction for enhanced reliability and performance.
OPTIMASI PARAMETER PEMBUBUTAN PADA MATERIAL AISI 4340 MENGGUNAKAN METODE TAGUCHI DAN GREY RELATIONAL ANALYSIS Otto Purnawarman; Achmad Sambas; Bella Rukmana
Jurnal Teknologi Terapan Vol 10, No 1 (2024): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v10i1.510

Abstract

In the turning process, the parameters of cutting speed (Vc), feed rate (f), and nose radius (rε) are things that influence the quality of the product. This study aims to optimize the relationship between the parameters of tool wear and surface roughness. AISI 4340 low alloy steel workpiece material and carbide insert cutting tools are used. The method used is a statistical application approach with the Taguchi method, gray relational analysis (GRA) techniques to get the best level combination for multi-response results and Analysis of variance (ANOVA) to determine factors that affect tool wear and surface roughness. The factor used is cutting speed. (Vc), feed rate (f), and nose radius (rε) with three levels and the responses are surface roughness (Ra) and tool wear (VB). The results of the ANOVA show that cutting speed (Vc) and feed rate (f) are significant factors for surface roughness and tool wear. The optimal factor level values for obtaining surface roughness (Ra) and minimum tool wear (VB) were Vc level 1 = 73.73 m/min, f level 1 = 0.1 mm/rev, and rε level 1 = 1.2 mm.
Optimasi Parameter Proses di Mesin 3D Printing Jenis Fused Deposition Modeling (FDM) dengan Filamen ABS pada Produk Poros Berpasangan menggunakan Metode Taguchi Otto Purnawarman
JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) Vol 5 No 1 (2023): Volume: 5 | Nomor: 1 | April 2023
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Manufaktur Bandung (Polman Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.48182/jtrm.v5i1.125

Abstract

Making customizing single product, we can use the additive manufacturing method. One of the additive manufacturing technologies is 3D printing. 3D Printing machines which often found on the market are Fused Depsition Modeling (FDM) technology. The fused deposition method or FDM is an additive manufacturing method which uses the concept of adding layers or materials to each layer. One of the main materials in the 3D printing process is ABS filament. However, the 3D Printing machine with FDM technology has a weakness, if you want to make products that are paired and have tolerances it will be difficult because the surface will appear to have lines that show the boundaries between layers. These lines are influenced by the parameters contained in 3D Printing. The Taguchi method is used to obtain optimum parameter variations and uses ANOVA analysis to determine what factors influence the shrinkage response to specific tolerances. The optimum combination of parameters on the shrinkage/deviation response to special tolerances on the inside diameter, namely nozzle temperature 230, print speed 70 and layer height 0.20. And on the outside diameter, namely the nozzle temperature is 250, the print speed is 90 and the layer height is 0.2.
Penerapan Teknologi Tepat Guna dalam Pembuatan Batako berbahan Serbuk Kaca Menggunakan Mesin Cetak Batako sebagai Upaya Pengelolaan Sampah di Desa Lamajang Kabupaten Bandung melalui Program KKN Pradika Noviandani; Otto Purnawarman; Mohammad Ali Suparman; Hartono Widjaja; Aileen Regina Maharani; Dimas Rizky Aji; Dhafin Razaqa Ridwan Hidayat
Jurnal ABDINUS : Jurnal Pengabdian Nusantara Vol 10 No 2 (2026): Volume 10 Nomor 2 Tahun 2026
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/ja.v10i2.27480

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk menerapkan teknologi tepat guna berupa mesin cetak batako dengan pembuatan batako berbahan serbuk kaca sebagai solusi permasalahan pengelolaan limbah kaca di Desa Lamajang, Kabupaten Bandung. Metode yang digunakan ialah metode rekayasa teknologi berbasis partisipatif masyarakat, yang meliputi tahapan identifikasi kebutuhan, perancangan alat menggunakan pendekatan DFMA, pembuatan prototipe, uji coba, serta pelatihan dan pendampingan kepada masyarakat. Proses perancangan mesin dilakukan menggunakan pendekatan Design for Manufacturing and Assembly (DFMA) untuk menghasilkan desain yang sederhana, efisien, dan mudah diproduksi menggunakan fasilitas bengkel dasar. Dari dua alternatif rancangan, Desain 2 dengan sistem tuas dan hopper dipilih karena lebih ergonomis, hemat energi, dan mudah dirakit. Hasil uji coba menunjukkan mesin mampu menghasilkan gaya tekan stabil sebesar 165 kgf dengan waktu siklus rata-rata 38 detik, serta kualitas batako yang padat dan seragam. Kegiatan dilanjutkan dengan diseminasi dan pelatihan kepada mitra terkait pengoperasian dan perawatan mesin menggunakan manual book. Hasilnya menunjukkan peningkatan kemampuan mitra dalam memanfaatkan limbah kaca menjadi produk bernilai ekonomi, serta mendukung pembangunan berkelanjutan di tingkat desa.
Co-Authors Achmad Sambas Aileen Regina Maharani Aini Fadhlih Hanifah Bella Rukmana Daffa Caesario Dhafin Razaqa Ridwan Hidayat Dimas Rizky Aji Hanif Azis Budiarto Hartono Widjaja Mohammad Ali Suparman PRADIKA NOVIANDANI Riky Adhiharto Riona Ihsan Media