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Majalah Teknik Mesin
Published by Universitas Muhammadiyah Surakarta
ISSN : 14114348     EISSN : 25414577     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Media Mesin: Majalah Teknik Mesin is published by Mechanical Engineering Department, Faculty of Engineering, Universitas Muhammadiyah Surakarta, Indonesia. Media Mesin: Majalah Teknik Mesin is an open-access peer-reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. Media Mesin: Majalah Teknik Mesin accepts submissions from all over the world, especially from Indonesia. Media Mesin: Majalah Teknik Mesin aims to provide a forum for national and international academicians, researchers, and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of Media Mesin: Majalah Teknik Mesin is specific topics issues in mechanical engineering such as: Energy Conversion and Management Thermofluids Material and Manufacturing, and Design and Structure All articles submitted to this journal can be written in Bahasa Indonesia and English. The journals will be published two times a year namely in January and July.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 5 Documents
 1 
Search results for , issue "Vol. 25 No. 2 (2024)" : 5 Documents clear
CHARACTERIZATION OF CENTRIFUGAL CASTING METHOD FOR PULLEY MANUFACTURING USING VARIABLE ROTATIONAL SPEED Wisnujati, Andika; Shomad, Muhammad Abdus
Media Mesin: Majalah Teknik Mesin Vol. 25 No. 2 (2024)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v25i2.2374

Abstract

Due to advancements in the industrial sector, aluminum is progressively gaining popularity as a material of choice in the field of engineering. A pulley is a component that functions as a link or transfers power or engine rotation to the load via the V-belt belt. This study aims to determine the characterization of aluminum material made by the centrifugal casting method from used brake shoes with rotational speed variables of 0 RPM, 100 RPM, and 200 RPM. The characterization of the casting results in this study was analyzed using the Brinell hardness test and the Charpy impact test. The results of the Brinell hardness test showed that aluminum castings for making pulleys with an additional 100 RPM die rotation speed had a Brinell hardness value of 53.22 BHN. The results of the impact test with the Charpy method showed that specimens with a mold rotation speed of 100 RPM had an impact value of 0.0135 kg.m/mm2. The results of this study concluded that variations in rotational speed of 100 RPM in the casting of pulleys made of used aluminum using the centrifugal casting method can produce products that have good toughness.
CLAMPING DIES DESIGN TO MINIMIZE AUTOMOTIVE COMPONENT DIES SETUP TIME AT PT GANDING TOOLSINDO Purbaningrum, Sanurya Putri; Lianny, Indah Kurnia Mahasih; Solih, Edwin Sahrial; Arohman, Abdul Wahid; Satiman , Bayu
Media Mesin: Majalah Teknik Mesin Vol. 25 No. 2 (2024)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v25i2.3012

Abstract

PT Ganding Toolsindo was faced with the problem of high automotive component die setup times. The main cause of the high setup time is the process of tightening and releasing the bolts which is done manually. The aim of this research is to design a tool for clamping dies which functions to help speed up the bolt installation process, so that the setup time for automotive component dies is reduced. The method used in this research is field observation followed by the die clamping design process. Design planning begins by drawing the object using CAD software based on the results of load calculations and determining the dimensions of the dies themselves and the press machine as well as selecting the dies material. Furthermore, proof was carried out that this die clamping design could reduce dies setup time using movement analysis with a pre-determined time study Measurement Time Method (MTM) method, where the results showed a time saving of 92.4%.
EFFECTS OF CONTINUOUS AND FRACTURED RIBS PLACED AT THE ENDWALL SURFACE UPSTREAM OF THE TURBINE-VANE LEADING-EDGE Shote, Adeola Suhud; Aasa , Samson Abiodun; Olakoyejo , Olabode T; Bamiduro, Aderemi Musiliudeen
Media Mesin: Majalah Teknik Mesin Vol. 25 No. 2 (2024)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v25i2.4349

Abstract

Total pressure loss, chaotic and heavy flow downstream of the turbine passage exit area are a few effects of the desired increase in inlet temperature input at the upstream part of the turbine vane passage. Huge amount of energy from the cross-flows near the middle of the vane actual chord are transported downstream by this chaotic flow which often results in aerodynamic loss and differential heat penalties. To compare the different arrangement, comparisons of the two geometries, the impact of adding various rib configurations upstream are studied for heat augmentation efficacies. The leading-edge rib(s) effects at the mid-stream of the vane passage are quantitatively examined in this work using computational fluid dynamics (CFD) technique. With the employment of Reynolds Averaged Navier-Stoke energy equations, the geometries are modelled choosing the appropriate boundary conditions. Polyhedral mesh is used with fifteen prism layer mesh at the endwall and vane surfaces to capture the flow physics close to the endwall area. Although the two configurations employed showed relative reduction in the total pressure loss coefficient, however, the fractured ribs produced superior outcomes of Nusselt number reduction of over 10% along the passage exit region. The data demonstrate a considerable difference in the overall pressure loss between the two configurations.
STUDY OF INNER AND OUTER POCKET CHARACTERISTICS USING AREA ROUGHING METHOD Suryono, Edy; Kristiawan, Y. Yulianto; Raharjo, Emanuel Budi; Siburian, Jonas Andika; Fajar, Jodi Muhammad
Media Mesin: Majalah Teknik Mesin Vol. 25 No. 2 (2024)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v25i2.4628

Abstract

Pocket milling is one of the CNC milling processes. This research aims to analyze the characteristics of pocket milling using Area Roughing on surface roughness and machining time. The method applied is experimental research on the Area Roughing method for working on inner and outer pockets. Research variables include depth cut 0.5, 1, 1.5, and 2 mm, stepover percent 40, 50, and 60%. The test is in the form of surface roughness value, while the analysis of the machining process is the time during the milling process. The workpiece material is 2024 aluminum and a flat endmill tool with a diameter of 12 mm. The expected result is the parameter that has the most optimal value for the processing time and surface roughness value. So it can be a guide for milling processes, especially those that use Area Roughing. The machining results show that the faster machining time results from larger settings for depth cut and stepover percent. Average machining time increase of 28%. Meanwhile, the surface roughness value will increase as the depth cut and stepover settings increase, namely 17.65% for the outer pocket and 18.61% for the inner pocket. The surface roughness value of the ordering results ranges from 2.4-4.8 µm.
IMPACT OF CHEMICAL REACTION ON MHD BOUNDARY LAYER FLOW OF NANOFLUIDS OVER A NONLINEAR STRETCHING SHEET WITH THERMAL RADIATION HAAR WAVELET COLLOCATION METHOD N, MAHESH KUMAR; Awati, Vishwanath B; Goravar, Akash
Media Mesin: Majalah Teknik Mesin Vol. 25 No. 2 (2024)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/mesin.v25i2.5146

Abstract

In this paper, we investigate the effects of chemical reaction and thermal radiation on MHD boundary layer fluid flow of nanofluid moving over a nonlinearly stretching sheet through semi-numerical approach. The nanofluid physical model of the problem comprises with effects of thermophoresis, radiation and chemical reaction parameters. The mathematical model scrutinizes mass, momentum, heat transfer and concentration equations are reduced to couple nonlinear ordinary differential equations over infinite domain using proper similarity variables. Haar wavelet collocation method is used to solve the resulting equations. The obtained results are compared with available numerical findings and are comparable which confirms and verifies the wavelet method. The effects of various non-dimensional parameters on the rate of heat and mass transfer are depicted through tables and graphs. It predicts that, the local Sherwood number increases with increase in the parameters of Brownian motion and thermophoresis. For both temperature and volume fraction profiles decreases due to an increase in the Schmidt number.

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