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All Journal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
Lubis, S.Y.
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Aerospace Engineering Automotive Engineering Mechanical Engineering Physics

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Pengaruh kecepatan potong terhadap keausan dan panjang pemakanan mata pahat keramik alumina pada pembubutan cast iron Nistelroy, A.R.; Lubis, S.Y.; Riza, A.
Dinamika Teknik Mesin Vol 14, No 2 (2024): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v14i2.862

Abstract

Turning is a metal forming process to produce cylindrical machine parts made using a lathe machine. Cast iron is one of the materials that has hard and brittle properties, therefore a harder and tougher type of cutting tools is needed. One type of cutting tools that has hardness and resistance to high temperatures is alumina-based ceramic. This study aims to analyze the alumina ceramic cutting tools by determining the level of wear that occurs with various cutting variables in cast iron turning. The experiment was carried out using a conventional lathe while the tool used was an alumina-based ceramic tool with a dry turning process without cooling. The cutting parameters used were cutting speed: 141.3 m/min, 222.9 m/min, 351.6 m/min, Spindle rotation: 450 r/min, 710 r/min, 1120 r/min, Depth of Cut: 0.1 mm, Cutting Resistance: 0.1 mm. The turning process was carried out with a time span of 5 minutes and then the tool wear value (Vb) was measured at 0.3 mm. The experimental results showed that at a cutting speed of 141.3 mm/min, the tool wear was 0.3 mm with a total feed length of 1575 mm for 35 minutes. At Vc 222.9 mm/min the tool wear was 0.35 mm with a total feed length of 1420 mm for 20 minutes. At Vc 351.6 the tool wear was 0.32 mm with a total feed length of 1680 mm for 15 minutes.
Pengaruh laju pemakanan proses milling terhadap perubahan temperatur pada pahat endmill karbida Putra, H.S.; Rumbiak, A.S.; Lubis, S.Y.; Darmawan, S.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 14, No 2 (2024): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v14i2.881

Abstract

Cutting Tool temperature has a significant role in the machining process in terms of tool life and workpiece properties. In dry machining process, cutting temperature condition must be monitored as excessive temperature rise can cause tool wear and damage to workpiece. Research on cutting heat has existed along with the development of metal cutting technology. Scientists have made many attempts to determine the cutting heat through theoretical analysis, numerical simulation, and experimental research. Measurement of cutting tool temperature requires a certain method because in milling process the cutting tool rotates to cut the workpiece. This research was condusted with an experimental research using an infrared thermal imager to obtain the result of carbide endmill toll in the face milling process of SKD61 (Special Kogyo Die)steel. The cutting parameters used were 1320 RPM spindle speed, 42, 98, 230 mm/min, and 0.5mm depth of cut. The milling process carried out with a time frequency of 5 minutes. The results of carbide endmill tool temperature measurement show that increasing the feed rate affects the temperature rise of the carbide endmill tool. At the feed rate of 42 mm/min, the highest temperature recorded was 152.3 ˚C, then at the feed rate of 98 mm/min, the highest temperature was 195 ˚C, and the feed rate of 230 mm/min had the highest temperature in this study, which was 219.4 ˚C.
Influence of infill parameters on the tensile strength of ABS 3D printing filament Winsen, L.; Michel, J.; Putra, W.M.; Lubis, S.Y.; Siahaan, E.
Dinamika Teknik Mesin Vol 15, No 1 (2025): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v15i1.949

Abstract

This study aims to analyze the effect of infill parameters on the tensile strength of Acrylonitrile Butadiene Styrene (ABS) filament in the 3D printing process for the manufacture of prototype cat prosthetics. ABS filament was chosen because it has good mechanical strength, resistance to high temperatures, and the ability to be further processed after printing. The infill parameters studied include infill percentage, layer thickness, and print speed. The research methodology involved making test samples with varying infill percentages, which were then tested using a tensile testing machine to measure the maximum tensile strength. The infill percentage was varied between 25%, 50%, 80%, and 100%. Tensile strength testing was conducted in accordance with ASTM D638 standards to determine the mechanical characteristics of the molded specimens and then the optimal infill parameters were applied in the design and manufacture of the cat prosthetic leg prototype, ensuring better load distribution and higher durability. The results show that the percentage density of infill has a positive correlation with the tensile strength of the specimen; an increase in infill density increases the tensile strength of the material. The findings provide practical guidance in the selection of infill parameters for tensile strength optimization in 3D printing applications using ABS filament so that it can be known that the influence of infill parameters greatly affects the strength of manufacturing.
Analysis of carbide tool wear during turning of aisi 4340 with variations in cutting speed Howard, A.; Rosehan, R.; Lubis, S.Y.
Dinamika Teknik Mesin Vol 15, No 1 (2025): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v15i1.943

Abstract

 This research aims to analyze the wear value of carbide cutting edges when used in the process of cutting AISI 4340 workpieces using a lathe. AISI 4340 is an alloy steel that is often used in the manufacturing industry because of its high strength and wear resistance. However, cutting in these materials can cause significant wear on the tool blade, which can affect the performance and service life of the cutting tool. The experimental method was carried out using a conventional lathe and a carbide cutting tool suitable for cutting alloy steel. A series of cutting tests were conducted with varying cutting speeds, while keeping the depth of cut and feed rate constant. The cutting parameters are as follows: varying cutting speeds of 141 m/min, 220 m/min, and 351 m/min, with a constant feed rate of 0.16 mm/rev and a fixed depth of cut of 0.5 mm for all cutting speed variations. It is shown that the carbide tool wear of 0.3 mm is reached at different times of each cutting speed. Data obtained from cutting tests are used to analyze the level of wear on carbide cutting edges and the factors that influence it. It is hoped that the results of this research will provide a better understanding of the interaction between the carbide cutting edge and the AISI 4340 workpiece during the cutting process.
Co-Authors Darmawan, S. Howard, A. Michel, J. Nistelroy, A.R. Putra, H.S. Putra, W.M. Riza, A. Rosehan, R. Rumbiak, A.S. Siahaan, E. Winsen, L.