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METAL : Jurnal Sistem Mekanik dan Termal
Published by Universitas Andalas
ISSN : 25981137     EISSN : 25974483     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
METAL: Jurnal Sistem Mekanik dan Termal translated as METAL: Journal of Systems in Mechanical and Thermal is a scholarly peer-reviewed journal published by Mechanical Engineering Department of Engineering Faculty at Universitas Andalas, Padang, Indonesia. The journal focused on the mechanics and thermal aspects of the mechanical engineering area, and accepted articles are in these subjects: Energy - Renewable energy - Green industry - Energy conversion Mechanical System Engineering - Solid body mechanics - Machine construction - Vibration and control - Mechatronics - Tribology Production System Manufacturing engineering - Product design and development - Production technology - Production logistics and transportation Materials Engineering - Material technology - Nanotechnology
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 143 Documents
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Effect of Tool Diameter and Feeding Speed on Surface Roughness in the AISI 1045 Steel Milling Process Iswanto Iswanto
METAL: Jurnal Sistem Mekanik dan Termal Vol 7, No 2 (2023): 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.7.2.31-35.2023

Abstract

This paper discusses how the influence of the tool diameter on the surface roughness of the workpiece, how the effect of feeding speed on the surface roughness of the workpiece and whether there is an interaction between the tool diameter and feeding speed on the workpiece surface roughness in the AISI 1045 steel milling process. Variables that are varied in this study were the tool diameter, namely 6 mm, 8 mm, and 10 mm and the variation of feeding speed used was 33.5 mm/min, 59.4 mm/min and 111.9 mm/min. After the AISI 1045 steel milling process by varying the specified parameters, and then the surface roughness test of the workpiece is carried out. From the results of research that has been done, it can be concluded that, tool diameter and feeding speed together have a significant effect on the surface roughness of the workpiece in the AISI 1045 steel milling process.
Manufacturing Induction Heating Based on Helical Coil Method by Using Arduino Mega 2560 Muhammad Hasan; Lenny Iryani
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.%p.2024

Abstract

Galvanic corrosion is a type of corrosion that often occurs in aircraft structures. This type of corrosion occurs because two different types of materials contact each other through an electrolyte media. As a result of this galvanic corrosion, several components in the aircraft structure can be damaged. One example of this damage is the corrosion of the bolts on the aircraft skin. So that makes it difficult to remove from the skin. One way to loosen the bolts due to galvanic corrosion is by heating. By using induction heater to the component, the rusty bolt can be loosened. The heat generated causes the bolt to stretch and break the corrosion and so that the bolt or nut can be opened easily. In this research, by using an Arduino Mega 2560 model to remove bolts and nuts with an open loop and closed loop system was conducted. Arduino Model as a microcontroller which is needed to run a program. The specimens of the bolts are using steel bolts grade 8.8 with key sizes 13, 17, and 19. The temperature to produce induction heater is set to a temperature of 150 °C. The results show that to reach 150 oC each of the key size its produce a different duration of time. Key size 13 took 190 seconds with 35.64 watts of power, key size 17 took 279 seconds with 36.96 watts power and the 19 key took 296 seconds with 41.43 watts power.
Thermal Stress Analysis for Barrel and Screw Component in The Plastic Waste Machine Using Finite Element Method Ari - Maulana; Ilham Maulana Yusup; Fariz - Syafrizal; Rizky - Adha; Dhimas - Satria; Hendra - Hendra
METAL: Jurnal Sistem Mekanik dan Termal Vol 7, No 2 (2023): 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.7.2.1-7.2023

Abstract

Plastic waste causes negative impacts for environmental such as air pollution, water pollution, and others. To solve this problem, a plastic processing machine was made. Barrels and screws are the most important components of this machine. Aims in this study to find maximum thermal stress for the barrel and screw component in the plastic waste machinery with temperatures operation 260 0C and variation material. Finite element method are used to simulate and show that the results for the barrel using alloy steel has a maximum von Mises stress of 618,292 MPa.  For displacement, this alloy steel material also has a maximum displacement of 0.612 mm. For the screw material used by using AISI 4340 Steel has a maximum von Mises stress of 849.997 MPa and the maximum displacement of 0.673 mm. It can be said that this material is still safe when used for barrels and screws component in the plastic waste machine processing.
Pyrolytic Product Distribution Analysis on Co-Pyrolysis of Face Mask Waste and Lignocellulosic Waste Rain Agri Mahendra
METAL: Jurnal Sistem Mekanik dan Termal Vol 7, No 2 (2023): 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.7.2.%p.2023

Abstract

COVID-19 causes a large increase in medical and non-medical waste in the world, especially in developing countries. Improper waste management causes significant health problems and impacts on the environment. Pyrolysis is a process that utilizes thermal instability of organic components in waste to convert them into liquid (oil), solid (charcoal), gas and wax products that have potential as fuels. Co-pyrolysis of medical face masks as infectious medical waste with non-infectious medical waste such as food waste, garden waste and paper were investigated for energy valorization. Particles, temperature, nitrogen flow rate and waste characterization affected the resulting product. Pyrolysis was carried out at 400 °C with nitrogen (N2) flow rate of 0.5 L/min. Co-pyrolysis of face masks and food waste produced oil with the highest yield because food waste contains dominant amount of cellulose and hemicellulose promoting high oil yield. This pyrolysis method is considered a simple, clean, safe and effective technique to reduce the amount of waste during a global pandemic.
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.
Autonomous Quadcopter Image Processing for Simulated Search and Rescue Flights Budi Hartono; Muhammad Rizki Zuhri; Citra Asti Rosalia; Nofrijal Fauzan
METAL: Jurnal Sistem Mekanik dan Termal Vol 7, No 2 (2023): 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.7.2.8-17.2023

Abstract

In Search and Rescue (SAR) operations, a designated search area is explored with aircraft and helicopters. After target identification, the flying vehicle continues landing and rescue procedures. This research uses a quadcopter to replicate a SAR flight simulation. Autonomous quadcopter operation includes takeoff and navigation between waypoints determined by Mission Planner software. On the way to the second waypoint, a camera-based image processing system scans the ground surface. If the marker is detected by the image processing system, the Raspberry Pi program will instruct control commands to the Pixhawk flight controller to ensure the quadcopter lands directly on the recognized marker. In the case when the quadcopter reaches the second waypoint but the system fails to identify the marker, the Mission Planner commands the quadcopter to autonomously return to the starting point and land automatically at the take-off location. An interesting aspect of this research concerns the application of a low-cost image processing system to ensure the quadcopter flies at a constant flight altitude above the ground surface, so that the quadcopter can perform simulated SAR flight missions and accurately identify landmarks. Research parameters include marker diameter, flight altitude, and quadcopter speed. The results show successful marker detection at a flying altitude of up to 3 meters above the ground and reaching a top speed of 3 m/s at a flying altitude of 2 meters.
The Effect of Aluminum Addition Ratio as Filling Material of PLA Toward PLA Filament Electrical Conductivity on 3D Printing Applications Firman Ridwan; Zuliantoni Zuliantoni
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.8.1.1-5.2024

Abstract

 The electronic waste of daily electronic goods evokes environmental pollution because electronic waste is difficult to decompose in nature and it is also toxic to the environment and humans. The way to minimize environmental pollution from electronic waste is by making polymer composites for conductive material purposes. Polylactic acid (PLA) has the potential as a polymer matrix. PLA has a non-toxic advantage and it is easily decomposed in nature because PLA is made from organic material.The extruder machine is used to make PLA filament with aluminum filling. When made the filaments, the ratio of each mixture was varied to obtain a filament with a mixture ratio that produced the best conductivity. The four-point probe test tool is used to measure the resistivity of each specimen to find out which specimen with the mixture ratio has the best conductivity value.The electrical conductivity obtained from the ratio of 10% Al is 6.78 S/m; 20% Al is 10 S/m; 30% Al is 31.44 S/m; 40% Al is 24.15 S/m. The best electrical conductivity results was obtained in the 70% PLA and 30% Al mixture ratio with an electrical conductivity value is 31.44 S/m while the lowest electrical conductivity was obtained in the 90% PLA and 10% Al mixture ratio with an electrical conductivity value is 6.67 S/m
Observation of Wear Characteristic on Razor Blades with Different Materials and Lubricants Dedison Gasni; Haznam Putra; Muhammad Azam
METAL: Jurnal Sistem Mekanik dan Termal Vol 7, No 2 (2023): 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.7.2.18-22.2023

Abstract

Wear of razor blades often occurs when a man shaves his facial. In this paper, the observation of wear characteristic with different types of material and lubricant is investigated. The experiment was conducted on 6 students of the Mechanical Engineering study program with uniform beards and mustaches for 6 weeks. Each week, the wear from the surface of each blade was observed using an optical microscope. Two types of razors were investigared with different materials based on the price, which are consisted of cheap razor (type-A) and expensive razor (type-B), each of which has 3 blades. There were three types of lubricants used, namely: water, liquid soap, and foam. The result shows that type-B razor is better than type-B razor because the material has a high carbon content based on chemical content from testing with Energy Dispersive X-Ray (EDX). Foam lubricant can slow down the wear on razor blades. The 1st blade razor wears out faster than the 2nd and 3rd bladem, respectively.
Sessile Drop Method Prediction of Particleboard Mechanical Properties Mekro Permana Pinem; Aldiansyah Rudy Adiwinoto; Yusvardi Yusuf; Dhimas Satria; Dwianto Dwianto; Sunardi Sunardi; Hendra Hendra; Nufus Kanani; Harly Demustila; Dimas Triwibowo
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.8.1.6-13.2024

Abstract

Agriculture waste-based materials have considerable potential as wood-based particleboard alternatives. It has been produced abundantly from nature and considers an eco-friendly material. One of the enormous resources is the paddy by-product, rice straw (about 500 million tonnes per year worldwide). In this work, the mechanical properties of rice straw-based particleboard are predicted easily and quickly using the sessile drop method.  Rice straw was crushed into 2-5 mm diameter powder-like materials, and corn starch was used as the binder. The rice straw particleboard was formed under a hot press machine (5 MPa, 180°C and 120 minutes). Conventionally, the sample mechanical property was tested through Universal Testing Machine (UTM). Unfortunately, the process is costly and difficult to access. It is necessary to have a rapid and low-cost presumption of the mechanical particleboard properties toward more efficient manufacturing. This work proposes a simple sessile drop method to indicate particleboard mechanical properties. Multiple linear regression was performed to see the correlation between sessile drop and UTM testing. It was found statistically that the sessile drop method could be used as an early prediction of particleboard mechanical properties.
Design of Control System for a Desktop Injection Molding Using Raspberry Pi 3 B+ Rahmat Rahmat; Meiki Eru Putra; Zulkifli Amin
METAL: Jurnal Sistem Mekanik dan Termal Vol 7, No 2 (2023): 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.7.2.%p.2023

Abstract

Injection molding is one of the techniques used to create plastic items. Plastic goods with good dimensional tolerances are frequently made using the efficient, accurate, and cost-effective injection molding process. The advantages of injection molding include quick product production, accurate process execution, cheap labor costs, automation of the process, and the ability to produce large quantities of items. There are many benefits to using a controller as a measuring device when injection molding. Making injection molding equipment easier to handle and observe is one of them. The process of regulating or controlling one or more quantities (variables) so that they are at a specific objective is known as a control system. In this study, a compact, mobile, automatic plastic injection machine that can create small plastic objects was developed. The design process is developed using the Python programming language, and the control system is a microcontroller of the Raspberry Pi type that has a complete architecture, including wifi and bluetooth modules, as well as a lot of memory. A NEMA 23 stepper motor with a torque of 2.2 Nm and a TB6600 motor driver are used in the drive system to control the voltage and rotation of the motor. A band heater type heating element with a maximum working temperature of 350°C at 220 volts is used in the heating system. A desktop program running on a 7-inch TFT display will show the process of controlling and monitoring the device.

Page 11 of 15 | Total Record : 143

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