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Tulus Burhannudin Sitorus
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Dinamis
Published by TALENTA PUBLISHER
ISSN : 02167492     EISSN : 28093410     DOI : https://doi.org/10.32734/dinamis
Core Subject : Science, Education, Engineering,
Education Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation
Focus and Scope Dinamis Journal is a national electronic journal as a means to publish scientific works in Mechanical engineering and other relevant fields. This journal has strengths and focuses on the sub-fields of energy conversion, structural materials and materials engineering, production processes, and maintenance systems which are all part of mechanical engineering science. This journal is managed by the Department of Mechanical Engineering, Faculty of Engineering, University of Sumatera Utara. Scientific works published in the Dinamis Journal are the results of research, both experimental, literature reviews, and simulations and contribute significantly to the development of science and technology. The Dinamis Journal publishes scientific papers in the field of Mechanical engineering related to the following fields of study: Experimental and Computational Mechanical Systems Solar Energy Fuel Cell Noise and Vibration Alloy and Processing
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 237 Documents
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Design Analysis of the Welding Fume Blower Bracket in the Welding Laboratory at Politeknik Sinar Mas Berau Coal Pradana, Ilmawan Suryapradana; Safitriani, Dewi; Adi Nugraha, Kris; Fadilman Sinambela, Haksa; Musliadi
DINAMIS Vol. 12 No. 2 (2024): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v12i2.18660

Abstract

Sinar Mas Berau Coal Polytechnic has equipped a welding laboratory with blower installation according to welding standards. Installing the blower requires a bracket as a holder. For the design, the type of material used is ASTM A36 material and analyzes the simulation of fume blow welding brackets with angle iron measuring 5x5 cm. In implementing the working steps for a sturdy and strong bracket within the tolerance limits explained as follows, namely planning and modeling the frame, simulating and calculating theoretically. Based on the design and testing of the welding fume blower bracket using the Autodesk Inventor 2018 application with a given load of 186,778 N. This test tests the maximum and minimum von Mises stress, displacement, safety factor, which is calculated using the Autodesk Inventor 2018 simulation. The results compare the theory and simulation. ASTM A36 material has a yield stress value of 248.225 Mpa, obtained by von Misese stress simulation calculations of 51.64 Mpa and theoretical calculations of 45.88 Mpa. The results of the von Mises stress deviation between simulation and theory are 11.29%. For displacement, theoretical calculations get a figure of 0.02247 and simulation results get a value of 0.09468. The results of the displacement deviation between simulation and theory are 3.21%. For the safety factor obtained in the analysis using software and theoretical calculations, the welding fume blower bracket obtained a safety factor value of 4.80 with theoretical calculations and 5.41. The results of the safety factor deviation between simulation and theory are 12.56%.
The Effect of Machining Parameters of Water Surface Tool Wear 6061be on 500 Watt Mini Cnc Machining Using Straight Endmill Carbide Tool With the Taguchi Method Napitupulu, Richard; Perangin Angin, Siwan; Voice Sihombing, Hendrik
DINAMIS Vol. 12 No. 2 (2024): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v12i2.18697

Abstract

In today’s world in the manufacturing sector, turning plays a vital role among all other cutting methods. The cutting technique of the material is one of the important things that determine the quality of the product, while the cutting parameters and conditions also play an important role in the machining process. Selecting effective cutting condition parameters is very important to ensure product quality, extend tool life, reduce production costs, reduce carbon emissions, and improve production efficiency. In the turning operation of CNC Router 3 Axis Mach 3, machining parameters and tool geometry play an important role, Optimization of machining parameters increases the economic value of machining and also increases the value of the product. In this study, Taguchi method with fuzzy logic is used as an efficient approach to determine the optimal machining parameters for CNC Router 3 Axis Mach 3 lathe parts for optimizing Tool Wear on Workpiece. Experimental design using L16 43 OA orthogonal array for 2 controllable factors, namely, cutting speed and depth of cut, each at three levels to find the optimal combination of factors and levels in high-speed CNC Router 3 Axis Mach 3 turning of Aluminum Alloys 6061. From Taguchi analysis, it is known that the order of parameters that affect the tool life is the first variable Cutting Speed , second Feed, third Depth of Cut
The Effect of Engine Noise on the Comfort of WA-360 Loader Heavy Equipment Operators Based on Capacity and Distance of 100, 150 and 200 cm Sihombing, Suriady; Nababan, Wilson Sabastian; Tampubolon, Miduk; Sihombing, Hendrik
DINAMIS Vol. 12 No. 2 (2024): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v12i2.18727

Abstract

The existence of a limited volume of machine room and coupled with the existence of various kinds of machinery in it, both main drive machinery such as the main motor and other supporting machinery such as electric motors, compressors, pumps and so on, all of which are sources of noise, will cause high noise noise. Where heavy equipment is a tool used to simplify the work process so that it becomes faster, easier and the results are in accordance with expectations and one example is the Whell Loader WA-360 heavy machine. Therefore, research is needed to measure the level of noise produced by the Whell Loader WA-360 heavy equipment engine to operator comfort. According to NAB According to Kepmenaker No. per-51/MEN/1999,2008 and SNI 16-7063-2004, the noise level that results in hearing damage of 90 dB for workers who are working for 8 hours per day. That the threshold value for the noise of the combustion chamber of the Wheel Loader WA-360 heavy equipment engine with a bucket capacity of 3.4 and 5 tons produces a noise level of 106.5 dB with a hearing scale and it is recommended that the operator of the Whell Loader heavy equipment use Earphones while doing work.
Analysis of Overall Equipment Effectiveness (OEE) Enhancement With Total Productive Maintenance Improvements in Rubber Company ALDA, TANIA; Bastanta Silalahi, Hiskia; Sinulingga, Sukaria
DINAMIS Vol. 12 No. 2 (2024): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v12i2.18817

Abstract

This research was conducted at a company engaged in rubber processing. This company plants, maintains, and processes rubber to produce Crumb Rubber. Based on observations during the study, it is known that there are defective products with an average of 400 kg per month. The type of defect found in the product is a white spot. Defects in these products are caused by failures in the performance of machines that experience thirst or collection, causing white spots in the products produced. This study aims to improve the company's performance by reducing defective products by analyzing the factors that cause a decrease in company performance, measuring the overall equipment effectiveness (OEE) value, and providing an improvement design to improve machine performance so that defective products can be minimized. The research found that two dominant factors cause high machine breakdowns: maintenance schedules and raw material quality. Based on the calculation results, the average overall equipment effectiveness value is 46%. Machine performance is not according to OEE standards due to the average value of the availability rate being 80%, the performance rate being 93%, and the quality rate being 57%. Based on this, the improvement design for the low OEE value is to improve the suggestion system, improve the quality control group, and implement the company's PDCA (Plan, Do, Check, Act) cycle.
Analysis of the Effect of Load Variation on Performance Gas Turbine Generator 1.1 At PLTGU UP Cilegon Edy Susanto; Prayoga Dwi Cahyo Sutomo Putra; Hotdian Sinambela
DINAMIS Vol. 12 No. 2 (2024): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v12i2.18830

Abstract

PT PLN Indonesia Power UP Cilegon merupakan salah satu PLTU yang menyuplai tambahan daya listrik untuk wilayah Jawa bagian barat dari sistem Jawa Bali dan mendukung pengembangan kawasan industri Jawa bagian barat. Namun untuk memenuhi pasokan listrik tersebut masih terdapat permasalahan terutama pada penambahan beban yang sangat mempengaruhi kinerja turbin gas. Tujuan dari penelitian ini adalah menganalisis dan membandingkan seberapa besar pengaruh variasi beban terhadap kinerja sistem turbin gas dan terhadap efisiensi termal GTG pada PLTGU Cilegon unit 1.1 dengan variasi beban 125 MW, 128 MW, 143 MW, dan 190 MW. Metode yang digunakan adalah analisis data logsheet operasional PLTGU, perhitungan spesifik pada turbin gas dan perhitungan efisiensi termal GTG. Pada hasil penelitian ini didapatkan peningkatan dari setiap variasi beban. Nilai kinerja tertinggi didapatkan pada beban 190 MW. Variasi beban sangat mempengaruhi kinerja dan efisiensi termal turbin gas, dimana semakin besar beban maka kinerja dan efisiensi termal turbin gas akan semakin tinggi.
Study of Contact Surface Roughness on Adhesive Performance in Steel and Aluminium Joints Adviana, Febry; Ula, Shofiatul; Sunardi
DINAMIS Vol. 12 No. 2 (2024): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v12i2.18847

Abstract

Adhesive bonding is a technique widely used in various industries to join materials together. This process provides several advantages over traditional mechanical fastening methods, such as welding or nailing, including improved appearance, weight reduction, stress distribution, and the ability to join dissimilar materials. The advantages of adhesive bonding are simpler assembly, lightweight and lower production costs. This research is one of the developments of the glue adhesive connection method. The materials used in this research are 1100 series aluminium and low carbon steel where both are metals that we often encounter in everyday life. This study aims to analyse the effect of roughness treatment on the surface of each different test specimen using sandpaper with different roughness levels, namely 80 grit, 150 grit and 400 grit. The test conducted in this study was a tensile test to determine the maximum strength of the adhesive strength of each test specimen with ASTM D1002 test standards. The results showed that test specimen A with surface roughness treatment using 80 grit had a tensile strength of 0.2267, test specimen B with surface roughness treatment using 150 grit had a tensile strength of 0.168 and test specimen with 400 grit roughness treatment had a tensile strength of 0.0315.
Investigation of the Impact Strength of MC Blue Material Due to Temperature Variations Yusuf Rahmansyah Siahaan, Muhammad; Rakhmad Arief Siregar; Faisal Amri Tanjung; Ahmad Yunus Nasution
DINAMIS Vol. 12 No. 2 (2024): Dinamis
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/dinamis.v12i2.18851

Abstract

Researchers carried out experimental testing on the MC Blue material using the charphy impact method. The MC Blue specimen was developed in a local workshop in Medan City, North Sumatra for three variations of testing temperature, namely normal temperature 31 oC, temperature 50 oC, and temperature 100 oC. The aim of this research is to determine the impact energy and impact strength values ​​of MC Blue material due to dynamic loads. The results of test data analysis show the mechanical characteristics of impact resistance with the highest value occurring in specimens at a temperature of 100 oC of 56.696 Joules at an average impact energy and an average impact strength value of 0.438 J/mm2. Meanwhile, the lowest Charphy impact resistance was shown by the normal temperature model of 31 oC of 17.975 Joules for the average impact energy value and the average impact strength value was 0.139 J/mm2. Temperature variations have a concrete impact, there is an increase in impact energy on the MC Blue material with a linear gradient equation y = 19.361x + 2.1467 and the impact strength value experiences a relevant increase due to temperature differences with a linear gradient equation y = 0.1495x + 0.0163.

Page 24 of 24 | Total Record : 237

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