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Unung Lesmanah
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : RING Mechanical Engineering

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Pengaruh Variasi Media Pendingin Terhadap Kekerasan dan Mikrostruktur Pada Pengecoran Aluminium 6061 Sigit Kristiadi; Unung Lesmanah; Artono Raharjo
RING ME Vol 2 No 2 (2022): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v2i2.19906

Abstract

The casting and the cooling process on the metal can affect the mechanical properties and physical properties that are formed. Changes in metal properties are influenced by the type and cooling medium in the metal cooling process. This study aims to determine the effect of different cooling media (Water, Dromus, and Coolant radiator) in the Quenching process on the hardness and microstructure of Aluminum 6061 which has passed the casting stage. It can be concluded that the variations in the cooling media used affect the different levels of hardness and microstructure of the test specimens. From the test results, it was found that the Water cooling media specimen had the highest level of hardness, the smallest grain size, and the amount of α-Al matrix formed was lower than the Dromus cooling media specimen. The test object with Dromus cooling medium has a higher hardness level, smaller grain size, and the amount of α-Al matrix formed is lower than the Coolant radiator coolant media test object which has the lowest hardness level, the largest grain size, and the amount of α-Al matrix the most
Analisis Kekuatan Sambungan Las TIG dengan Variasi Arus Listrik pada Penyanggah Tabung Pasteurisasi Berbahan Stainless Steel 201 Alkamaluddin; Unung Lesmanah; Mochammad Basjir
RING ME Vol 2 No 2 (2022): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v2i2.19921

Abstract

Welding (Welding) is a metal joining procedure by softening some of the base metal and filler metal without regard to additional metal and produces a persistent metal. Welding has many endless types depending on the cycle and maintenance. One of the welding processes is electric curve welding which is separated into 2 classifications, namely the consumable cathode and the non-consumable terminal. Welding this time using Gas Tungsten Bend Welding or better known as Tungsten Idle Gas (TIG). TIG gas is one type of electric circle segment welding with argon gas protection. This welding is widely applied to processed steel, aluminum, responsive metals such as magnesium and titanium. This study utilizes variations in electric currents of 100 A and 130 A. From the results of the examination that has been carried out, the strength of the TIG welding joints with variations in electric current is obtained on the sanitary machine supporting cylinders made of 201 tempered steel. J/mm2, at 130 An electricity it is 5.140 J/mm2 and at 160 An electricity it is 3.676 J/mm2. In this way the best value of the effect test is at 100 A.
Analisis Pengaruh Variasi Heat Treatment Material Aluminium Alloy 6063 Terhadap Laju Korosi Asri Dilomo; Priyagung Hartono; Unung Lesmanah
RING ME Vol 4 No 1 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v4i1.21533

Abstract

Corrosion is material damage caused by comprehensive aspects, destruction or damage to the material due to reactions with its environment. Corrosion is a damage to materials (generally metals), the corrosion process occurs not only in the form of chemical reactions, but also electrochemical reactions. In the industrial world, the use of engineering materials is one of the most important for the application of various kinds of equipment, the use of alumininium alloy material which is very widely applied, especially in the development of the automotive sector that requires lightweight materials and is not susceptible to damage caused by corrosion, improving material properties by changing the atomic structure of the material by heat treatment of materials using the precipitation hardening method. Corrosion analysis on aluminum alloy 6063 material using weight loss method according to ASTM G31-72 standard, reweighing material after corrosion on pure seawater media to determine material weight loss caused by seawater
ANALISIS NILAI OVERALL EQUIPMENT EFFECTIVENESS PADA MESIN PACKER FOCKE FX 2 DI PT ABC Reditya Chiesa Ramadhan; Unung Lesmanah; Mochammad Basjir; Nur Robbi; Rangga Ega Santoso
RING ME Vol 5 No 1 (2025): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rme.v5i1.23696

Abstract

This study carried out to overcome the performance and efficiency problems of the Packer Focke FX 2 machine at PT. ABC. The study uses descriptive quantitatie approach to analyze Overall Equipment Efetiveness (OEE) value. The resultof OEE value is analyzed by Six Big Losses method to find the losses factors and used the failure mode Effect Analysis (FMEA) method with fishbone diagram to find its root causes and provide suggestion for improvement. The result of the study is OEE value from the period of June 2024 to Ugust 2024, which was 43,4 %. This result is lower than the world standart OEE of 85 %. These result are caused by high value of idling and minor stoppage losses at 15,84% and breakdown losses at 13,46%. The root of problems was found using FMEA method with RPN value of 288, which is failure in blank feeding process with type of failure mode is blank material jamming in blank track area because of spray glue jet was not function optimally. So that, the recommendation of improvements that are given are related to preventive method, spare part management, and employee competency
Co-Authors Ahmad Nidhom Uddin Alkamaluddin Artono Raharjo Asri Dilomo Basjir, Mochammad Ena Marlina Kresna Agung Yudhistira Miftachul Tofani Nur Robbi Priyagung Hartono Rangga Ega Santoso Reditya Chiesa Ramadhan Sigit Kristiadi Suhartini Syaifulloh Ahmad Troy Febrianto