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All Journal Media Teknologi Hasil Perikanan Jurnal Rekayasa Mesin JMPM (Jurnal Material dan Proses Manufaktur) AL-JAZARI JURNAL ILMIAH TEKNIK MESIN Quantum Teknika
Samodra, Yudha
Unknown Affiliation
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering

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Studi Eksperimental Hubungan Feeding di Mesin Bubut CMZ T-360 dengan Kekasaran Permukaan Material St 60 untuk Shaft Steady Rest Kurniawan, Agus; Samudra, Yudha; Nugroho, Eko Prasetyo; Eleganta, Florent Reno; Ganang, Gabriel; Krisnata, Hindi Chandra; Faturrahman, Ichsan
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol 2, No 1 (2020): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.020115

Abstract

The research tested the effects between feeding and surface roughness on shaft of steady rest which will be worked in CMZ T-360’s lathe machine. Material of St.60 was turned into shaft of steady rest in 2 CMZT-360’s machines with several of feeding like 0.045, 0.056, 0.068, 0.079, 0.90 and 0,102 mm/rev. Then the work piece was tested the surface roughness of the work piece with using roughness tester and being seen the shape of the surface with using photo macro. The result of the roughness’s test showed that CMZ-T360’s lathe machine could reach Ra 1.55 µm until 4.79 µm with several of feeding. The work piece would be assembled in steady rest and being used to support 58 kg weigth in 2 hours to know the effect of surface roughness. After testing on steady rest, would be done photo macro on the specimen to make easy on visual analysis. From the data which is obtained can conclude that feeding variation which used on this research not so affecting the quality of surface roughness of the workpiece, the value of surface roughness that resulted from this research is mostly N8 (3,25 µm- 5,29 µm) and only a few that valued N7 (1,55 µm-2,53 µm) . The second conclusion is the surface roughness which quickly wornt-out after assembled at steady rest is the rough surface (4,79 µm become 3,84 µm) compared with the smooth surface (2,23 µm become 2,03 µm).
ANALISIS KEBERHASILAN PENGGUNAAN ULANG CARTRIDGE FS2-7 MESIN INJEKSI MOLDING TIPE SPACELINE 1 PADA SISTEM PELUMASAN OTOMATIS Aditya Nugraha; Franciscus Brian; Ana Ningsih; Thomas Ganda Wijaya; Yudha Samudra
AL-JAZARI JOURNAL SCIENTIFIC OF MECHANICAL ENGINEERING Volume 8, ISSUE 2, Nopember 2023
Publisher : Universitas Islam Kalimantan Muhammad Arsyad Al Banjari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/al-jazari.v8i2.11035

Abstract

AbstrakSistem pelumasan otomatis menggunakan media cartridge untuk menyimpan grease, tetapi cartridge hanya dapat digunakan sekali sehingga dilakukan penelitian untuk pengisian grease ulang ke dalam cartridge. Perbaikan desain pengisian adalah pada sistem pencekaman cartridge. Sistem pencekaman didesain untuk mengurangi tekanan ketika proses pengisian sedang berlangsung. Sistem pencekaman menggunakan dua unit metode. Pencekaman pertama digunakan untuk mencekam cartridge yang terbuat dari resin polyester. Resin digunakan karena proses pengaplikasian pada kontur luar cartridge yang mudah, sehingga dapat meminimalisir biaya produksi. Pencekaman kedua digunakan hose clamp untuk mencekam unit pencekaman pertama. Hasil analisis menunjukan presentase konsistensi pengisian grease pada cartridge fs2-7 sebesar 98,88%. Rata-rata waktu yang dibutuhkan untuk melakukan pengisian grease selama 14 menit 59 detik, sedangkan estimasi pemompaan sebanyak 135 kali dengan 1 kali pompaan menghasilkan 5 gram grease. Hasil pengujian cartridge pada mesin injeksi molding menunjukan presentase keberhasilan sebesar 96 %. Rata-rata waktu untuk satu cycle time sebesar 8,38 detik, sedangkan estimasi sebesar 8,35 detik. Hasil pengukuran terhadap tekanan yang keluar pada cartridge untuk unit clamping sebesar 9,58 MPa dan unit injection sebesar 6,94 MPa.Kata Kunci: Pengisian Grease, Cartridge fs2-7, Alat Bantu Pengisian Grease AbstractThe automatic lubrication system uses a media cartridge to store grease, but the cartridge can only be used once, so research is being done to refill the grease into the cartridge. The filling design improvement is in the cartridge suppression system. The clamping system is designed to relieve pressure when the filling process is in progress. The suppression system uses two unit methods. The first clamp is used to clamp the cartridge which is made of polyester resin. Resin is used because the application process on the outer contour of the cartridge is easy, so it can minimize production costs. The second clamp is used to clamp the hose clamp to the first clamping unit. The results of the analysis show that the percentage of grease filling consistency in the fs2-7 cartridge is 98.88%. The average time required to fill the grease is 14 minutes 59 seconds, while it is estimated that 135 pumping times with 1 pumping time will produce 5 grams of grease. The results of testing the cartridge on the injection molding machine showed a success rate of 96%. The average time for one cycle time is 8.38 seconds, while the estimation is 8.35 seconds. The measurement results for the pressure coming out of the cartridge for the clamping unit is 9.58 MPa and the injection unit is 6.94 MPa.Keywords: Grease Filling, fs2-7 Cartridge, Grease Filling Tool
OPTIMASI PRODUKSI SEMI REFINED CARRAGEENAN MELALUI PENDEKATAN PROSES EKSTRAKSI: Optimization of Semi-Refined Carrageenan Production through Extraction Process Samodra, Yudha; Nur Rokhmah, Laela; Prayitno
Media Teknologi Hasil Perikanan Vol. 12 No. 2 (2024)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/mthp.12.2.2024.56140

Abstract

Semi refined carrageenan (SRC) is a processed seawed from Eucheuma cottonii. This product widely used in industry. The objective of this experiment is to decribe the influence of four independent variables, there are concetration of of solvent (KOH), soaking, extraction temperature and extraction time with semi-refined carrageenan (SRC) gel stregth level and rendement level. The method used experiment to determin the optimal condition of each variables. The ectraction eucheuma cotonii with 35% moisture from Sumba used high milk reactivity procces (HMR). Semi-refined carrageenan produced then determined the level of gel strength and yield. The results showed soaking for 10 hours with extraction in 0,10% KOH solution (w/v), extraction temperature of 121,6°C for 5 minutes to give the gel strength of 320,04 g/cm2 to yiled 53,19%. Extraction time is longer provide a higher yiled strength but lower gel.  Carrageenan yield at 21,6°C with an extraction time of 25 minutes produced the highest value, 54,59%. Kata kunci:  carrageenan extratction; gel strength; semi refined carrageenan; yield   Semi-refined carrageenan (SRC) merupakan salah satu olahan rumput laut dari Eucheuma cottonii. Bentuk olahan demikian banyak dimanfaatkan berbagai industri. Penelitian ini bertujuan untuk mendapatkan data pengaruh empat variabel bebas yaitu konsentrasi alkali (KOH dengan 3 variasi konsentrasi), waktu perendaman (3 variasi), suhu (5 variasi) dan waktu ekstraksi (6 variasi) terhadap tingkat kekuatan gel dan rendemen SRC yang dihasilkan. Metode yang digunakan adalah eksperimental untuk menentukan kondisi optimum masing-masing variabel .Proses ekstraksi dengan teknik  ekstraksi reaktivitas suhu tinggi (HMR, high milk reactivity) terhadap rumput laut Eucheuma cotonii dari Sumba mendapatkan kadar air sebesar 35%. Semi-refined carrageenan yang dihasilkan kemudian ditentukan tingkat kekuatan gel dan rendemennya. Hasil penelitian menunjukkan perendaman selama 10 jam dengan ekstraksi pada larutan KOH 0,10% (w/v), suhu ekstraksi 121,6°C selama 5 menit memberikan kekuatan gel sebesar 320,04 g/cm2. Dengan rendemen yang lebih rendah. Yield karagenan pada suhu 121,6°C dengan waktu ekstraksi selama 25 menit menghasilkan nilai tertinggi dari penelitian yaitu sebesar 54,5%. Kata kunci:  ekstrasi karaginan, kekuatan gel, semi refined carrageenan, rendemen
Analisis Kekuatan Desain Interlocking Filling cabinet Completed Knocked Down dengan Penggunaan Metode Finite Element Analysis Samodra, Yudha; Ganesha, Christophorus Fanri; Sugijopranoto, Andreas; Hutama, Adhi Setya; Anggoro, P. Wisnu
Jurnal Rekayasa Mesin Vol. 19 No. 2 (2024): Volume 19, Nomor 2, Agustus 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i2.5631

Abstract

Filling cabinet  merupakan bagian dari office equipment yang berfungsi sebagai penyimpan dokumen atau arsip penting dari suatu perusahaan atau sekolah. Terkait proses manufakturnya, filling cabinet  memiliki 2 tipe pembuatan, yaitu completely built up (CBU) dan completely knockeded down (CKD). PT. X merupakan salah satu Perusahaan yang bergerak di bidang pembuatan office equipment. Pada proses pembuatan filling cabinet  4 laci di PT. X,   ternyata masih terdapat permasalahan, salah satunya adalah waktu produksi yang lama. Hal ini disebabkan oleh proses pembuatan filling cabinet  tersebut masih menggunakan tipe completely built up (CBU). Oleh karena itu diperlukan pengembangan produk untuk mengganti tipe produksi filling cabinet , dari tipe CBU menjadi tipe completely knockeded down (CKD). Pada penelitian ini, dianalisis 3 jenis desain interlocking filling cabinet  CKD seperti louver, hemming, dan screw. Selanjutnya dianalisis menggunakan metode Finite Element Analysis, dengan cara simulasi dengan perangkat lunak Computer Aided Engineering (CAE). Tujuan dari penelitian ini adalah didapatkan jenis desain interlocking filling cabinet  yang memiliki ketahanan yang paling tinggi. Berdasarkan hasil analisis, desain filling cabinet  dengan tipe hemming, merupakan Solusi desain untuk tipe CKD. Karena nilai simulasi tegangan yang terbesar terdapat pada tipe tersebut, 286,764 MPa untuk pembebanan 30kg, 467,782 MPa untuk 50kg, dan 761,501 MPa untuk 70kg.
Analisa Perbandingan Desain Panel Distribusi dengan Metode Computational Fluid Dynamics Hutama, Adhi Setya; Kurniawan, Yohanes Hendra; Jati, Fajar Pranawa; Samodra, Yudha
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 7 No. 2 (2023): Desember
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v7i2.19905

Abstract

A distribution panel is a piece of equipment or device that consists of several electrical components that are arranged and arranged in such a way that they can distribute electrical power, and its use must guarantee security for users, so a Type-test is needed to determine the security of the distribution panel, one of the type-test tests is the temperature rise test. The temperature rise test was successfully carried out, but there are still problems, namely the heat distribution is unknown. The Computational Fluid Dynamics (CFD) method with flow simulation software can be used for heat transfer analysis in distribution panel systems, so that an ideal panel design is obtained to overcome overheating. The CFD analysis process is carried out by comparing 3 distribution panel designs, namely the first design using an exhaust fan, the second design with one output ventilation, and the design without an exhaust fan. Based on the results of the CFD analysis, the safest distribution panel results were obtained, namely the first design using an exhaust fan, the design with an exhaust fan experienced a temperature drop of 4°C compared to the design without an exhaust fan and the second design when viewed from surface 9.
Optimization of Spot Welding Parameters on Shear Tensile Strength of 0.9 mm SPCC Material using the Taguchi Methods Samodra, Yudha; Hutama, Adhi Setya; Kurniawan, Perwita; Hayu, Winastwan Sista; Nugroho, Th. Adi
Jurnal Rekayasa Mesin Vol. 20 No. 3 (2025): Volume 20, Nomor 3, Desember 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i3.7032

Abstract

Resistance spot welding (RSW) is one of the most widely used joining methods for thin metal sheets in the manufacturing industry, particularly for low-carbon steel materials such as SPCC. At PT. XYZ, inconsistencies in weld quality have been observed due to the absence of optimized process parameters. This study aims to analyze the influence of spot welding parameters—welding current, welding time, and holding time—on the shear tensile strength of 0.9 mm SPCC material. The Taguchi method with an L9 orthogonal array experimental design was employed to identify the optimal parameter combination. Shear tensile testing was conducted in accordance with ISO 14273:2016, while data analysis was performed using the Signal-to-Noise (S/N) ratio with the "larger is better" criterion and Analysis of Variance (ANOVA).The results indicate that welding current is the most dominant factor, contributing 71.12% to the variation in shear tensile strength, followed by welding time at 21.11%, while holding time has a relatively minor contribution of 5.66%. The optimal condition was achieved at 34 kA (welding current), 15 cycles (welding time), and 10 cycles (holding time), yielding a maximum shear tensile strength of 572.06 kgf and an S/N ratio of 54.00 dB. This study demonstrates that the Taguchi method is effective for optimizing spot welding parameters with a minimal number of experiments, providing a reliable technical guideline to improve the quality and consistency of production processes in the manufacturing industry.
Co-Authors Adhi Setya Hutama Aditya Nugraha Agus Kurniawan Ana Ningsih Eko Prasetyo Nugroho Eleganta, Florent Reno Faturrahman, Ichsan Franciscus Brian Ganang, Gabriel Ganesha, Christophorus Fanri Hayu, Winastwan Sista Jati, Fajar Pranawa Krisnata, Hindi Chandra Kurniawan, Yohanes Hendra Nugroho, Th. Adi Nur Rokhmah, Laela P. Wisnu Anggoro, P. Wisnu Perwita Kurniawan Prayitno Sugijopranoto, Andreas Thomas Ganda Wijaya