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All Journal Jurnal Rekayasa Mesin Unistek: Jurnal Pendidikan dan Aplikasi Industri Jurnal Konversi Energi dan Manufaktur JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Sumarno, Dodi Iwan
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Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Identifikasi Bahaya dan Penilaian Risiko Pengujian Conveyor Belt di Laboratorium PT. X Menggunakan Metode Hazard Identification and Risk Assessment ., khamaludin; Sumarno, Dodi Iwan
UNISTEK Vol 8 No 2 (2021): Agustus 2021 - Januari 2022
Publisher : UNIVERSITAS ISLAM SYEKH - YUSUF TANGERANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33592/unistek.v8i2.1452

Abstract

In an effort to ensure the quality of conveyor belt products at PT. X, before being sent to consumers, product testing needs to be done. The conveyor belt testing activity has the potential for work accidents to be experienced by the testing operator. To anticipate this, it is necessary to identify hazards and assess risks to Occupational Safety and Health (K3) from all conveyor belt testing activities. The scope of this research is only on conveyor belt testing activities in the testing laboratory section of PT. X. The method used in this Hazard Identification and Risk Assessment is by using the Hazard Identification and Risk Assessment (HIRA) method, namely by determining all types of testing activities, their hazards and risks and determining the severity, probability of occurrence, controls carried out, and level of concern. Test operators are sufficiently concerned about the importance of risk hazard control and all testing activities are equipped with controls in the form of the use of Personal Protective Equipment and engineering controls. There are 16 types of hazardz and 12 risks in coveyor belt testing activities. The IBPR value of all conveyor belt testing activities is no more than zero or there is no significant hazard.
PERANCANGAN SISTEM AIR SUSPENSION PADA SEPEDA MOTOR HONDA VARIO 110 Hidayat, Ramdan; Akmal Islami, Lazuardi; Sumarno, Dodi Iwan
Jurnal Permadi : Perancangan, Manufaktur, Material dan Energi Vol 4 No 1 (2022): JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/permadi.v4i1.73

Abstract

This study discusses the suspension on motorcycles by changing the standard suspension system, namely spring suspension / Coil Spring by designing an air suspension system to be applied to the Honda Vario 110 motorcycle. There are several problems with the suspension of spring-type motorcycles, namely when adjusting the suspension and the level of comfort. The purpose of this study is toknow the construction design, design and know the ratio of damping values pthere is an air suspension system and coil spring applied to the initial design of the motorcycle. The design and simulation method carried out is using Autodesk Inventor 2020 Software. In this design process, there are additions to the construction, namely the holder for the suspension as an air suspension support and changes to the size of the engine mounting which is extended to increase the suspension water storage space. As a result of the Autodesk Inventor 2020 simulation, the Air Suspension made of rubber with a load of 300 kg with a damping value of 7,744 N/m is greater than the initial suspension made of steel wire spring (SW) with a value of 7,500 N/m.
Simulasi Perbaikan Desain Proses Pembentukan Tempa Dingin (Cold Forming) Mur M14 Sumarno, Dodi Iwan; Zaid Sulaiman; Maman Suryaman
Jurnal Permadi : Perancangan, Manufaktur, Material dan Energi Vol 5 No 2 (2023): JURNAL PERMADI : PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/permadi.v5i2.122

Abstract

Nut and bolt components (fasteners) can be produced through various techniques, including through the forging process. However, in a cold forging process (cold forming) the production of nuts cannot be separated from failures, in the form of defects in cracks on the surface. This failure has an impact on productivity, besides that it can hamper other processes. In this study, the crack defects of SWCH45K carbon steel M14 nuts could be identified visually during inspection. In order to find out the cause of the failure, an analysis was carried out by simulating the cold forming process for the M14 nut according to the existing process variable data using the DEFORM 2D/3D V10.2 program. The simulation results show that the formation at stations 3 and 4 does not fully fill the mold (dies) and high damage to the bearing surface (flange) area, crack defects are caused by high concentrations of stress in the process of forming station 3 because the punch corner does not have a radius (rounding). With the design punch parameters proposed for process improvement, the simulation results for the formation of M14 station 3 and 4 nuts are fully filled, the potential for crack defects decreases.
Analysis of Print Speed Variations Effect and Nozzle Temperature on the Tensile Strength of 3D Printed TPU-95A Products Gulo, Triadesman; Mardiyana, Dani; Sumarno, Dodi Iwan
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 1 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.1.6

Abstract

This study aims to analyze the effect of print speed and nozzle temperature variations on the tensile strength of TPU-95A material printed using the fused deposition modeling (FDM) method. The varied parameters include print speeds (70, 80, and 90 mm/s) and nozzle temperatures (230 and 240 °C). Tensile test specimens were produced using an Ender-3 Pro 3D printer according to the JIS K6251-2017 standard and tested with a Shimadzu AGS-X 10kN tensile testing machine. The results showed that the combination of a 90 mm/s print speed and a 230 °C nozzle temperature yielded the highest tensile strength of 318.74 kgf/cm². Conversely, the lowest tensile strength of 212.20 kgf/cm² occurred at a 90 mm/s print speed and a 240 °C nozzle temperature due to thermal degradation of the material. This study highlights the importance of selecting optimal printing parameters to enhance the mechanical strength of 3D-printed products made from TPU-95A.
Analysis of the Effect of Print Speed and Layer Height on the Hardness of TPU-95A Filament 3D-Printed Products Lesmana, Rizal; Mardiyana, Dani; Sumarno, Dodi Iwan
Jurnal Konversi Energi dan Manufaktur Vol. 10 No. 1 (2025)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.10.1.2

Abstract

The effect of print speed and layer height settings can influence the mechanical properties of 3D-printed products; however, the impact of print speed and layer height on the hardness of products printed with TPU-95A filament has not been extensively studied. This research employs an experimental method by creating specimens according to ASTM D2240 standards, using various print speed settings (70, 80, and 90 mm/s) and layer heights (0.15 and 0.20 mm). The results show that a combination of lower print speeds and thinner layer heights yields higher hardness test results. A print speed of 90 mm/s and a layer height of 0.15 mm produced the highest hardness, while the combination of 90 mm/s print speed and 0.2 mm layer height resulted in the lowest hardness. This study contributes to the optimization of 3D printing parameters for flexible material applications, such as TPU-95A, in relation to product hardness outcomes.
Kajian Kelayakan Sifat Mekanik Produk 3D Printing FDM Berfilamen eFlex TPU-95A untuk Aplikasi Polisi Tidur Mardiyana, Dani; Sumarno, Dodi Iwan; Yudono, Muchtar Ali Setyo; Islami, Lazuardi Akmal
Jurnal Rekayasa Mesin Vol. 19 No. 3 (2024): Volume 19, Nomor 3, Desember 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i3.5966

Abstract

Polisi tidur berfungsi meningkatkan keselamatan lalu lintas dengan mengurangi kecepatan kendaraan di area berisiko tinggi. Salah satu metode produksi polisi tidur adalah melalui teknologi additive manufacturing (AM) menggunakan mesin 3D printer berjenis fused deposition modeling (FDM) dengan filamen eFlex TPU-95A. Filamen ini memiliki sifat fleksibel yang cocok untuk aplikasi tersebut, namun sifat mekanik seperti kekerasan, keuletan, dan kekuatan tarik sangat dipengaruhi oleh pengaturan parameter proses pencetakan. Oleh karena itu, penelitian ini bertujuan untuk mengkaji pengaruh variasi parameter pencetakan, seperti suhu nozzle, kecepatan pencetakan, dan ketebalan lapisan, terhadap sifat mekanik produk 3D printing dari filamen TPU-95A. Metode Taguchi L9 (33) digunakan untuk menentukan kombinasi parameter optimal dalam proses pencetakan. Uji sifat mekanik dilakukan pada beberapa sampel produk hasil eksperimen. Berdasarkan hasil penelitian, sampel 1, 3, dan 4 menunjukkan sifat mekanik yang sangat baik dalam hal fleksibilitas dan ketahanan terhadap deformasi dinamis, sehingga layak digunakan sebagai bahan alternatif untuk pembuatan polisi tidur. Penelitian ini menyimpulkan bahwa produk 3D printing dengan filamen TPU-95A dapat memenuhi standar sifat mekanik yang diperlukan untuk aplikasi polisi tidur, terutama dalam hal daya tahan dan performa terhadap beban dinamis, dengan penyesuaian parameter pencetakan yang tepat.
Co-Authors Aminuyati Dani Mardiyana Gulo, Triadesman Islami, Lazuardi Akmal Khamaludin, Khamaludin Lazuardi Akmal Islami Lesmana, Rizal Muchtar Ali Setyo Yudono Ramdan Hidayat Zaid Sulaiman