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JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY
Published by Universitas Medan Area
Articles
16
Articles
Analisis Reliability Centered Maintenance (RCM) Rel Conveyor pada Mesin Oven BTU Pyramax 150N di PT. Flextronics Teknology Indonesia - Batam

Sariyusda, Sariyusda ( Politeknik Negeri Lhokseumawe )

JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Vol 2, No 1 (2018): EDISI JUNI
Publisher : JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY

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Abstract

Reliability Centered Maintenance (RCM) atau lebih dikenal dengan the expert system of maintenance merupakan suatu metode desain sistem manajemen perawatan yang mampu memberikan jaminan ketersediaan, keselamatan, lingkungan serta desain sistem applicable dan komprehensif. Rel conveyor oven Btu Pyramax 150N adalah salah satu bagian yang sangat berpengaruh pada proses manufacturing sebuah PCB (Papan Circuit board) pada PT.Flextronics Teknology Indonesia – Batam  (Indonesia). Tujuan yang ingin dicapai ialah melakukan perancangan sistem manajemen perawatan berdasarkan RCM untuk menghindari terjadinya kegagalan (failure) peralatan mesin pada saat operasi yang menyebabkan terganggunya produksi dapat dihindari. Metode yang dilakukan pada penelitian ini mengunakan metode FMEA (Failure Mode and effect analysis) dan penelitian dapat tiga peralatan kritis yaitu rantai conveyor, jaring baja dan alur poros melintang.

Study on the CBN Tool Wear Mechanism on Dry High-Rate Turning Process for AISI 4140

Harto, Budi ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , Umroh, Bobby ( Mechanical Engineering Dept., STT Sinar Husni, Indonesia ) , Darianto, Darianto ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area )

JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Vol 2, No 1 (2018): EDISI JUNI
Publisher : JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY

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Abstract

This study aims to investigate tools wear and wear mechanisms when machining high-rate extreme minimum lathe AISI 4140 material in hard and dry cutting conditions. Cutting tool made from CBN CB7015 Sandvik Coromant production is used for turning of AISI 4140 steel in order to obtain the failure mode of tool and the wear mechanism of the cutting tool. The machining process is carried out under dry cutting conditions with variations of high velocity Vc, feeding rate f, and a cutting depth a at minimum rate conditions. The wear growth curve obtained shows that the CBN tool undergoes three phases: the initial phase, the gradual phase, and the abrupt phase. From the results of the study found that the failure modes that occur are flank wear, crater wear, flaking, chipping, and fracturing catastrophic failure. The wear mechanism that occurs in outline is caused by abrasive, adhesive, and diffusion processes. While the cracks and fractures that occur due to a combination of impact load and thermal shock

Numerical Study on Plate Holders Pipe Recovery Boiler Superheater

Amrinsyah, Amrinsyah ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , syam, amir ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , Darianto, Darianto ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , zulfikar, zulfikar ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area )

JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Vol 2, No 1 (2018): EDISI JUNI
Publisher : JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY

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Abstract

The important part which has a function as supporting of superheater header on the boiler recovery type (RB) is a couple of support plate which is hanged on the hanger rod. This part is very difficult to analyze by experimental because there are in a tight insulation and heavy duty condition. This research aim to obtain the stress distribution that happened on the plate as the effect of static load in simulation mode. The model is designed base on the dimension of real support plate size 400x200 mm and thickness 15 mm. It is use the FEM software of Ansys version 5.4. The theory of failure analysis of Tresca and von Mises become the reference for materials strength. The area contact theory of b represents the reference to determine the length of stress area along curve of both contact area. The material that is used is from steel ASTM A514 with the yield strength 690 MPa. The Result is stress distribution along curve and also critical point which has possibility failure occurs on the support plate. The analysis result could be a reference for the development of the further construction.

NUMERICAL ANALYSIS OF STRENGTH OF REAR BRAKE HOLDER FLAT ON THE MOTOR CYCLE DUE TO IMPACT LOAD

Zulfikar, Zulfikar ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , Umroh, Bobby ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , Amrinsyah, Amrinsyah ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , Kurniawan, Fadly A ( Mechanical Engineering Dept., Univ. Harapan, Indonesia )

JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Vol 2, No 1 (2018): EDISI JUNI
Publisher : JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY

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Abstract

Brake is one of vital motorcycle element, which serves as a speed reduction mechanism. This section reinforced with retaining plate which serves to hold the wheels when braking process occurs. Research on the plate strength is still rarely found. Stress distribution that occurs on the plate due to shock loads is also not well known. Therefore, this study aims to obtain the strength retaining plate with a numerical analysis of the distribution of stress and deformation which occur on plate. Research done in two ways, experimentally and numerical simulations. Experimentally, direct measurements on the amount of stress that occurs on the plate. The research was done by putting strain gage on the connection plate and brake. In simulation, using Nastran software with the primary data based on the results of the experimental measurements. Based on the results of the numerical analysis of the stress distribution that occurs is obtained that the maximum stress distributed around the staging area in direct contact with the brake. Therefore, motorists should be aware that section and provide additional anchoring structure to further strengthen the structure of the retaining plate rear brake.

Heat Transfer Simulation on the Wall of Rotary Cast Iron Smelting Furnace Capacity of 1 ton/hour

Syam, Amir ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , zulfikar, zulfikar ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , Hutasuhut, Muhammad Idris ( Mechanical Engineering Dept., Univ. Harapan, Indonesia )

JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Vol 2, No 1 (2018): EDISI JUNI
Publisher : JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY

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Abstract

The rotary smelting furnace is a cast iron smelting furnace with the working principle of raw material rotated in a melting drum. The difficulty of this type of furnace is if the furnace wall is damaged, it will be very difficult to determine the appropriate conduction coefficient material as a replacement material. Numerical simulations are required to obtain the heat transfer information that occurs on the furnace wall. This analysis aims to (1) obtain the temperature distribution occurring in the furnace wall, and (2) obtain the heat transfer coefficient on the wall surface on the inside, center, and outside of the melting furnace. Calculation of numerical simulation in this research is assisted by using Ansys software. The theoretical basis of numerical heat transfer simulation analysis can be determined by using the conduction temperature equation in each node. The load conditions in this case are assumed as thermal loads. The result obtained temperature distribution on the inner wall is 1590 oC, middle 1470 oC, and outside 1104 oC.

Numerical Simulation on Mechanical Strength of a Wooden Golf Stick

Darianto, Darianto ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , Umroh, Bobby ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , Amrinsyah, Amrinsyah ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area ) , zulfikar, zulfikar ( Mechanical Engineering Dept., Engineering Faculty, University of Medan Area )

JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Vol 2, No 1 (2018): EDISI JUNI
Publisher : JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY

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Abstract

In general, golf players only know the techniques used in Golf games, but do not know the golf sticks response that occurs when the ball is hit. Referred to as response is the stress and strain that arises from the impact load that occurs when the hitting member touches the ball. The objectives of this research are: (a) to analyze golf sticks response when impact occurs, and (2) to know the stress distribution that occurs in golf sticks. The golf stick design in this study uses the autodesk inventor software. The material used is Titanium for head stick and Graphite for stick rod. The basic principle of this study is based on simple swing pendulum method. The variables that will be used for simulation are: swing speed, that is difference between start and end speed, that is Δv = 272,2 m / s, impact time, which is the time when the ball touches the batter Δt = 0.0005 seconds, the volume of the head of the stick Vo = 96,727 mm3, the cross-sectional area of the stick A = 63,504 mm2, the head mass of the sticks ρ = 4620 kg / m3, and the modulus of titanium elasticity 9.6 e +10 Pa. From the simulation result on the surface of the golf club hitter is obtained as follows: σmax = 2.1231e +10 Pa at 1.231e-06 s, emax = 0.22115 m / m at 1.231e-06 s, and the maximum stress and strain is located in the area the connection between the stick and the head of the stick.

PERMURNIAN MINYAK KEMIRI DENGAN ADSORBSI BENTONIT UNTUK MERUBAH KARAKTERISTIK MUTU

yusda, sari ( Politeknik Negeri Lhokseumawe )

JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Vol 1, No 2 (2017): Edisi Desember
Publisher : JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY

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Abstract

Perencanaan alat pemurnian ini merupakan teknologi alternatif untuk memurnikan minyak kemiri dengan memanfaatkan bentonit alam sebagai adsorben.  Jenis alat adsorpsi adalah type fixed bed coloums (silinder tegak), dimana kolom dilengkapi unggun  adsorben bentonit. Alat pemurnian minyak kemiri ini dirancang dengan kapasitas 5 liter. Bahan rancangan menggunakan pipa PVC setinggi 160 cm, sedangkan untuk media kolom adsorber terbuat dari bahan acrylic 2 inc setinggi 30 cm yang berdiameter rata-rata 50 mm, Bentonit sebagai adsorben diisi kedalam kolom setinggi 80 cm. Adsorber juga dilengkapi dengan media filter  halus dibagian atas dan dibagian bawah. Untuk mensirkulasi minyak kemiri secara kontinyu adsorber dilengkapi dengan pompa tekanan rendah. Ukuran bentonit 10 mesh, 20 mesh dan 30  mesh dibakar dalam furnace mencapai suhu 300 0C selanjutnya diaktifasi dengan H2SO4 1 M dengan cara perendaman. Setelah pembilasan dengan aquadest bentonit dikeringkan dalam oven  pada suhu 110oC.  Untuk menganalisa kinerja adsorber dilakukan pengoperasian peralatan dengan menganalisa sampel pada waktu sirkulasi 15, dan 30 menit. Dari hasil penelitian semakin lama waktu sirkulasi (30 menit) dan ukuran partikel bentonit sebagai adsorben semakin mengecil (30 mesh), minyak kemiri yang dihasilkan semakin murni. Indek bias sebesar 1,475, Bobot jenis 0,92895 dan nilai kalor 33486.  Hasil permunian minyak kemiri menggunakan adsorben bentonit alam sesuai dengan standar mutu SNI 01-4462-1998.

Analysis of Economizer Design To Boost The Efficiency of The Boiler in The State Polytechnic of Medan

Ananda Nst, Pafh Rizki

JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Vol 1, No 2 (2017): Edisi Desember
Publisher : JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY

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Abstract

Ekonomizer berfungsi untuk memanaskan air pengisi boiler dengan memanfaatkan panas dari gas sisa pembakaran di dalam boiler. Dengan meningkatnya temperatur air pengisi boiler maka efisiensi boiler juga akan meningkat. Telah dianalisa perancangan sebuah ekonomizer pada boiler pipa api dengan 7 belitan dan dapat dilihat setelah dilakukan perancangan ekonomizer maka efisiensi boiler meningkat sebesar 14,2%, terjadi penurunan laju aliran bahan bakar sebesar 5,909 kg/jam, terjadi penghematan energy panass sebesar 22,32 % dan biaya penggunaan bahan bakar akan menurun.

ANALISA EKSPERIMENTAL MODULUS ELASTISITAS BAHAN KOMPOSIT GLASS FIBER REINFORCED PLASTIC (GFRP) BERDASARKAN VARIASI DIAMETER SERAT AKIBAT BEBAN IMPAK LAJU REGANGAN TINGGI

sarman, sarman ( engineering faculty )

JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Vol 1, No 2 (2017): Edisi Desember
Publisher : JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY

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Abstract

GFRP composite is one of the alternative materials that the most common as a replacement for metal. This material has a light weight, easy to shape, good strength, and the production cost is relatively cheaper. This study aims to investigate the effects of fiber diameter variation of mechanical behavior, particularly on the load of high strain rate impact. The application of impulse momentum theory in the elastic region is the basic science for this case. The AGC apparatus is equipment that used for this test because it could generate the high strain wave rate in the single direction loading. Specimen is placed in the position of tight end against the end of the input bar. The results showed that the increase in fiber diameter variations affect the value of E that is produced. Thus, it is become a recommendation for the use of this material in certain circumstances.

Karakteristik permukaan dan struktur mikro Pada bahan aluiminium 6061menggunakan Pahat Karbida dengan metode pemesinan laju tinggi dan pemesinan kering

umroh, bobby ( Mechanical Engineering, Engineering Faculty, Universitas Medan Area )

JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY Vol 1, No 2 (2017): Edisi Desember
Publisher : JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY

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Abstract

Penelitian pemesinan laju tinggi  dan kering dengan tujuan untuk kemasan permukaan yang meliputi corak permukaan cacat (defect) yang diakibatkan oleh kondisi pemesinan  pada  bahan aluminium 6061 menggunakan pahat karbida. Pengumpulan data pengujian pemesinan ini dilakukan menggunakan metode faktorial data sebanyak 8 kali percobaan dengan 3 variabel utama yaitu laju pemotongan(V), laju pemakanan (f) dan kedalaman potong (a) pada tiga tiga tingkat besaran. Dari percobaan yang telah direkomendasikan dengan kondisi pemesinan terbaik  maka didapati beberapa Nilai kekasaran permukaan sangat ditentukan oleh aus pahat yang tinggi. Aus pahat yang tinggi (0.129-0.247)sangat berpotensi terjadi cacat berupa koyak permukaan (tearing surface) permukaan benda kerja termesin, pada laju pemakanan yang tinggi terjadi feed mark goresan karena laju pemakanan yang tinggi .Lebar butiran pada mikrostruktur sangat ditentukan oleh kecepatan potong, dimana pada kecepatan potong V= 1000 m/min besarnya butiran terlihat lebih melebar sedangkan pada V=1250 m/min besar butiran terlihat lebih rapat