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All Journal Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi
Triyono
Universitas Trisakti
Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering

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Analysis of Mechanical Properties and Microstructure of Aluminum and Copper Sheet Welding Using Friction Stir Spot Welding Method Adit Waisal; Hary Munandar; Sofia Debi Puspa; Achdianto; Triyono
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa dan Inovasi Volume 6 Nomor 1 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i1.5552

Abstract

Welding aluminum and copper materials using friction stir spot welding (FSSW) is widely practiced. Although strong enough, it still produces keyhole and shoulder marks, which are quite large due to the large shoulder and pin sizes. This study investigates the joining of aluminum and copper panels using the FSSW technique using smaller shoulders and pins in different shoulder shapes. The study began by cutting aluminum and copper panels 150 mm long, 50 mm wide, and 5 mm thick. The joining process was carried out at rotational speeds of 900, 1200, and 1500 rpm with tools with several variations in pin length. Pin lengths of 0, 5, and 7 mm with pin diameters made the same at 5 mm, shoulder diameter 20 mm. The connection was observed for macrostructure, microstructure, and hardness. Different tool geometries have the potential to be applied in FSSW joints, especially for sheets. The highest hardness value is found in Cu-Cu material welding, with an average hardness value of 101.63 HVN in the stir zone area. The lowest hardness value is located in the base metal of aluminum material, with an average hardness value of 48.37 HVN.
Geometry Characterization of Products Results in the Finishing Process Using Centerless Belt Grinding Machine Jesika Erventy Osman; Sofia Debi Puspa; Triyono; Hary Munandar
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa dan Inovasi Volume 6 Nomor 1 Tahun 2024
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v6i1.5554

Abstract

The centerless belt grinding machine that was previously designed at the Department of Mechanical Engineering at Universitas Trisakti can be used for finishing machining products. However, it is not yet known how the machine will perform on the geometric characteristics of the product as a result of the finishing process with a centerless belt grinding machine. The geometric characteristics here are the results of measurements in cylindricality, roundness, and surface roughness. This research aims to determine the machine's performance and whether there are significant differences in the centerless belt grinding finishing process. Control chart analysis is used to determine the consistency of engine performance, and a comparison of the feed speed is used to determine engine performance. Next, data processing was carried out using the paired sample t-test statistical test to determine whether there were significant differences between the turning and milling processes. The consistency test results indicated good performance achieved at a maximum speed of 25.47 mm/minute (angle 12°) for cylindrical, roundness, and surface roughness measurements. The statistical test results of the paired t-test between the turning and grinding processes showed significant differences, as indicated by the P-value (0.00) < ∝ (0.05) on cylindricality, roundness, and surface roughness.
Co-Authors Achdianto Adit Waisal Hary Munandar Jesika Erventy Osman Sofia Debi Puspa