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Journal of Mechanical Engineering Learning
Published by Universitas Negeri Semarang
ISSN : 2252651X     EISSN : -     DOI : https://doi.org/10.15294/jmel
Core Subject : Engineering,
Mechanical Engineering
JMEL: Journal of Mechanical Engineering Learning published by the Mechanical Engineering Department, Faculty of Engineering, Universitas Negeri Semarang Indonesia, is a journal that contains scientific articles on mechanical engineering and mechanical engineering learning. Published articles in english by JMEL include the results of original scientific research findings and scientific review articles are new in mechanical engineering learning. JMEL publishes periodically six months.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 5 Documents
 1 
Search results for , issue "Vol. 13 No. 1 (2024): June" : 5 Documents clear
Design and analysis of pneumatic based automatic unwind splicing on a rotogravure machine Rahmadhi, Arif; Sumbodo, Wirawan; Saputro, Danang Dwi; Musyono, Ari Dwi Nur Indriawan; Setiadi, Rizki
JMEL : Journal of Mechanical Engineering Learning Vol. 13 No. 1 (2024): June
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jmel.v13.i1.3179

Abstract

The aim of this design is to obtain a design for the tension control system and the automatic system, which are the two mechanisms in the unwind, accompanied by an estimate of the design costs. The design process was carried out using the French method. This method is often used for new products or still has few competitors, with the advantage of being able to facilitate the selection of product concept variants efficiently when designing products that have many limitations in terms of variants. Based on the validation results, the second concept design used is a tension measurement mechanism using a load cell and speed regulation using a magnetic powder brake. The results of numerical calculations show that the maximum rotation torque value of the printed material is 13.6 Nm, the maximum speed is 628.24 rpm, and the maximum stress value measured is 206.122 N. Based on the validation results, the second concept design is a movement mechanism that uses four pneumatic cylinders to move the frame and cutter. The results of numerical calculations show that the time required to cut the material is 0.24 seconds, and the time required to return to its original position is 2.25 seconds. The amount of air required for one cutting cycle is 37.83 ×10-6 m3/s. The estimated cost of designing the overall unwind unit based on the components used is IDR. 74,873,625.
The effect of cutting speed on the roughness level of low carbon steel cutting results using the trulaser 3030 machine Amron, Husni; Roziqin, Ahmad
JMEL : Journal of Mechanical Engineering Learning Vol. 13 No. 1 (2024): June
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jmel.v13.i1.5503

Abstract

This research aims to determine the effect of variations in cutting speed on the roughness value of low carbon steel cutting results using CNC Laser Cutting TruLaser3030. This research uses experimental methods and descriptive statistical data analysis techniques and diagrams to present data on the measurement results of research specimens using cutting speeds of 2520 mm/minute, 2205 mm/minute, and 1890 mm/minute. Roughness testing was carried out using Surface Roughness Mitutoyo SJ-210. The results of the research produced data showing that the higher the cutting speed, the roughness value increases and the lower the cutting speed, the roughness value will decrease. And if the cutting speed is too high then the material cannot be cut. The lowest roughness value, namely 8.46µm, was at a cutting speed variation of 1980 mm/minute. The highest roughness value, namely 23.63µm, occurs at a cutting speed variation of 2520 mm/minute.
Correct use of Indonesian terms for 4-stroke motorbikes: a solution to make it easier to understand the working Hasna Nailah Luthfiyah; Ruhiyat, Hamzah Salman; Faisal, Muhammad Sabdha; Saputra, Tanu; Rizkyanfi, Mochamad Whilky
JMEL : Journal of Mechanical Engineering Learning Vol. 13 No. 1 (2024): June
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jmel.v13.i1.5523

Abstract

This research aims to offer concrete solutions regarding the appropriate use of terms in the context of 4-stroke motorbikes, especially regarding their working mechanisms. The methodology used in this research is qualitative. Interviews with teachers, mechanics, and students were used as a way of collecting data. The use of Indonesian terms in understanding the working mechanisms of 4-stroke motorbikes has a significant impact on teachers, workshop mechanics, and students. This has the potential to increase understanding, engagement, effective communication, and skill development. Ultimately, this will improve the quality of teaching, workshop services, and student understanding in the automotive field.
Literature review of modification of u-type savonius wind turbine rotor for low wind speeds Alfatih, Muhammad Danang Ilham; Adiwibowo, Priyo Heru; Saptono, Renaldi Prima; Fani, Rayhan Aulia Iman; Pambudi, Dimas Ridho; Ciptafarizi, Muhammad Zardana; Setiawan, Kharis
JMEL : Journal of Mechanical Engineering Learning Vol. 13 No. 1 (2024): June
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jmel.v13.i1.5845

Abstract

A wind turbine is one of the tools that can be used to convert wind energy into electrical energy. The increasing need for electrical energy in Indonesia and fossil fuels are running low, so alternative to fossil fuels are needed. One of them is a wind turbine that can convert wind energy into wind mechanical energy into kinetic energy in the form of turbine blades that are used to rotate generators that can produce electricity. Indonesia is an area that has low wind speed. This study aims to analyze the effect of U-type savonius wind turbine rotor modification at low wind speeds. The research method used is a qualitative method in which we conduct library research on various literature to examine the effect of turbine rotor modification. The results obtained are the addition of a guide vane or deflector and the increase in the number of blades on the turbine rotor can improve the performance of the U-type savonius wind turbine.
Effect of using a high performance-low pollution muffler (hplpm) with catalytic converter on fuel consumtion and performance of 110cc Susanto, Nugroho Fajar; Roziqin, Ahmad; Naryanto, Rizqi Fitri; Mujaki, Ahmad
JMEL : Journal of Mechanical Engineering Learning Vol. 13 No. 1 (2024): June
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jmel.v13.i1.7934

Abstract

The increse in the number of motorcycles to fulfil mobility is domianted by matic type. Over time the vehicle will experience a derease in performance and appearance, triggering modification. the purpose of this study was to determine the difference in motorcycle performance with the use of standard exhaust, HPLPM 2 + catalytic converter and HPLPM mod + catalytic converter. This reaserch was conducted with a quantitative research meode with an experiemental approach, performance testing test data at engine speed of 3000-9000 rpm. Engine temperature 80 degree with pertamax fuel ocatane 92. In this study, HPLPM mod + catalytic converter produces 12,23 N.m of torque at 4500 rpm, the highest power produced by HPLPM 2 + catalytic converter 8,27 Hp at 5500 rpm. exhaust HPLPM mod + catalytic converter is able to maintain power at high rpm 7,70 Hp at 8250 rpm.

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