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Pratama, Muhammad David
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Evaluation of the Effects of Five Mold Temperature Variations on Cooling Rate and Contraction Force in the Forming of Aluminum 7075 Alloy Pratama, Muhammad David
Journal of Engineering and Science Vol. 3 No. 2 (2024): July-December 2024
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v3i2.260

Abstract

The 7075 series aluminum alloy, renowned for its tensile strength of up to 572 MPa, is widely employed in the production of aircraft components requiring exceptional structural integrity, such as wing panels, tail assemblies, fuselage frames, and stringers. The airframe, serving as the primary load-bearing structure, is critical in distributing stresses during both flight and ground operations. This study examines the influence of mold temperature variation on thermal contraction and applied force in 7075 aluminum alloy, using the Constrained Rod Casting (CRC) method. Five mold temperature settings—150 °C, 200 °C, 250 °C, 300 °C, and 350 °C—were analyzed to determine their relationship with cooling rate. Data were obtained through cooling curve observations, followed by curve analysis to extract relevant parameters. The results indicate that the fastest cooling rate occurred at 350 °C (25.1 °C/s), while the slowest occurred at 200 °C (13 °C/s). The highest thermal contraction was recorded at 350 °C (316.54 N), whereas the lowest was observed at 150 °C (252.35 N). Variations in cooling rates are attributed to differences in both mold temperature and the duration of the solidification process.
SISTEM MONITORING PADA RANCANG BANGUN MESIN PENGEMASAN BENDA DENGAN SISTEM PNEUMATIK BERBASIS PLC DAN HMI Pratama, Muhammad David; Sjahrul, Yurika; S, Sarip udin
Jurnal TEDC Vol 18 No 3 (2024): JURNAL TEDC
Publisher : UPPM Politeknik TEDC Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70428/tedc.v18i3.858

Abstract

The desire to work more effectively and efficiently makes humans continue to innovate to create technology that can facilitate human work in all fields and types of work, one of which is the industrial field. Technological advances in the industrial sector are better known as the industrial revolution. One of the impacts of the industrial revolution that continues to grow rapidly is the operation of industrial machines, most of which are operated automatically. Control technology that can make machines work automatically is a Programmable Logic Controller (PLC). PLC is a computer designed to control a machine or system. One of the uses of PLC in the industrial world is on a packing machine using box. In the packaging machine, the PLC acts as an actuator controller, the actuator used is a solenoid valve to speed up the packaging process automatically. In addition to controlling the actuator, PLC can also monitor this goods packaging machine remotely using the Human Machine Interface. From the results of the tests carried out, it is found that the system that has been made can work properly, this can be seen in the HMI which can operate the system and when there is damage to the system, the history alarm will turn on so that it can facilitate the system repair process.
Co-Authors S, Sarip udin Saripudin S