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Riki Effendi
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SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin
Published by Universitas Muhammadiyah Jakarta
ISSN : 20889038     EISSN : 25499645     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin is an open access, peer-review journal which publishes original and review articles that advance the understanding of both the fundamentals of engineering science and its application to the solution of challenges and problems in mechanical engineering systems, machines and components. The editorial team aims to publish high quality and highly applied research and innovation that has the potential to be widely disseminated, taking into consideration the potential mechanical engineering that it could generate.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 8 Documents
 1 
Search results for , issue "Vol 12, No 2 (2018): SINTEK JURNAL" : 8 Documents clear
EVALUASI KONDISI MESIN BUBUT HARIZON T300 MENURUT METODE SCHLESINGER SEBAGAI ACUAN DALAM MELAKUKAN TINDAKAN PERAWATAN Frans Mangngi
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 12, No 2 (2018): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

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Abstract

To ensure that a lathe still has a high performance and accuracy, it is necessary to evaluate the condition of the machine. The results of the evaluation are not only used to determine the performance and accuracy of the machine but more than that can be used to determine the maintenances and repairs actions more precisely, therefore the condition of the machine can be returned to a better state. The aims of the reserach was to evaluate the condition of lathe machine Harizon T300 brand that exists in the Laboratory of Maintenance and repair of Mechanical Engineering Department of State Polytechnic of Kupang; The results of this evaluation will serve as a reference in performing appropriate maintenance actions against the machine. The evaluation method and procedure used is based on standard test chart according to Schlesinger method. It was found that, from the 8 test components of Harizon T300 lathes, only two test components that still met the standards of geometric accuracy are: (1). Centre sleave for true running, and (2). Centre point for true running; While the other 6 components of testing have not met the required standards, namely: (1). The flatness of the bed, (2). Work spindle parallel with the bed in a vertical and horizontal plane, (3). Work spindle parallel with the bed in the vertical and horizontal plane, (4). the axis of centers parallel with the bed in the vertical plane, (5). Tailstock sleeve parallel with bed vertical and horizontal plane, and (6). Tailstock guide ways parallel with the movement of the carriage; Thus the conclusion of this research is the Harizon T300 lathes that used as a sample of this research was not standard anymore and needs to be reconditioned.
EFEK PEMASANGAN ISOLATOR TERHADAP KONSUMSI BAHAN BAKAR LPG MESIN SANGRAI BIJI KOPI INDUSTRI KECIL Muhammad Trifiananto; Intan Hardiatama
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 12, No 2 (2018): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

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Abstract

Coffee beans in Jember Regency continue to be increased in line with the expansion of new crop fields. New coffee plantations plus 9 hectares were based on data from the Jember Regency Statistics Agency from 2008. Coffee bean production in Jember District in 2011 totaled 28,961.79 quintals, from 22,080.47 quintals for 2010. (Budiharjo, 2014). The increase in coffee bean production and land area is not followed by the level of prosperity of coffee farmers who own the land (Budiharjo, 2014). An appropriate technology to increase the selling value of coffee products  are roasting and packaging. The roasting method used greatly affects the quality of coffee. This study focused on the variation of insulators applied to roasting machines. The purpose of this study was to determine the rate of heat loss from the coffee roaster machine after being given the addition of an insulator and find out how much coffee production costs using a roaster machine which was given the addition of an insulator. Experimental research using a coffee roaster machine with LPG fuel with a capacity of 10 kg. Research was carried out by varying the insulators used such as without insulators, adding aluminum foil, adding glass wool, adding wood powder, adding glass wool and extruded polystrene foam, the last addition wood powder and extruded polystrene foam. Data retrieval was carried out using a temperature sensor and data logger with four thermocouple types K mak 6675. In addition to data retrieval of temperature, LPG consumption data was also collected. The results showed that the smaller thermal conductivity of an insulating material, produced lower  heat ratio and  lower  fuel consumption.
SINTESIS FASA ɣ-Co PADA PADUAN Co26Cr6Mo0.18N DENGAN KOMBINASI METODE HOMOGENISASI 1200 oC DAN HOT ROLLING SERTA TRANSFORMASI STRUKTUR KRISTALNYA R. Ibrahim Purawiardi; I Nyoman G. P Astawa; Fendy Rokhmanto; Ika Kartika
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 12, No 2 (2018): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

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Abstract

Co-Cr-Mo alloy is a material that widely used for bioimplant in the medical field due to its corrosion resistance and mechanical properties. Structurally, recommended Co-Cr-Mo alloys for medical applications are ɣ-Co phase which has an FCC structure. But, Co7Mo6 metastable phase often occurs after its synthesis. The formation of Co7Mo6 phase will decrease the composition of ɣ-Co phase. This study aimed to synthesize ɣ-Co phase without following the appearance of Co7Mo6 phase using a combination of 1200 oC homogenization and hot rolling followed by cooling treatment. The alloy used was Co26Cr6Mo0.18N ingot. Cooling treatments were done using the variation of cold water, water and air. The transformation of the crystal structure from the primitive cubic to the FCC occurs during water and air cooling treatments which means that ɣ-Co phase is successfully formed by those cooling treatments. However, Co7Mo6 phase is still formed on the water cooling treatment while none of  Co7Mo6occurred on the air cooling treatment. Structurally, air cooling treatment produces most stable ɣ-Co phase than the others. However, brittle ɛ-Co phase as a partial dislocation is formed after air cooling treatment due to imperfection of hot rolling treatment.
PRODUKTIVITAS PERAWATAN SUMUR (STUDI KASUS DI TOTAL E&P INDONESIE) Muhdi Rizal; Yustiar Gunawan
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 12, No 2 (2018): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

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Abstract

In the upstream oil and gas industry, at plateau production period, well intervention activity is important to maintain the production level. In PT. Total E&P Indonesie, well intervention has contributed approximately 23% average per year of the whole oil and gas production. It is important to evaluate the well intervention productivity for continuously improvement. This research as the case study in PT. Total E&P Indonesie in offshore area by collecting the data of well intervention activities that have been done on 736 wells. Through the set of analysis and Focus Group Discussion (FGD) with experts resulted 12 dominant factors influenced the well intervention productivity in offshore area and well intervention productivity index 70.8 Scfd/USD wellhead in 2016 and 43.9 Scfd/USD wellhead in 2017. And still by Focus Group Discussion (FGD), there are 18 obstacles of the dominant factor and 31 root causes have been identified which is then analized and resulted 9 recommendations of well intervention productivity improvement.
PENGARUH BENTUK BUKAAN TERHADAP KEKUATAN DAN GETARAN BALOK Sunardi Klaten; Erny Listijorini; Raimundus Sandro
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 12, No 2 (2018): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

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Abstract

Beam is widely used for building and mechanical structure. The beam characteristics must be able to answer the problem in field. In recent years, beam was made which compromised between stiffness and weight of beam. The beam has high stiffness but remains light. Beam was designed with opening (cellular) that can reduce its weight. The method used in this research was experimental and simulation with FEM. Geometric of cellular in this beam is a circle, square and rhombus by maintaining the same beam weight.  The bending testing used is three-point bending method which is indicated stress and deflection. Output of vibration testing is frequency and damping constant. Damping constant is calculated by logarithmic decrement method. Research data show that dimension and geometric of beam cellular affect the strength and behavior of vibration significantly. Circular opening have the smallest stress and deflection in all conditions. The highest frequency and damping constant occur in rhombic opening 1.681 Hz and 84,88 kg/s respectively.   
RANCANG BANGUN ALAT PENGATUR KERUCUT LALU-LINTAS SEMI-OTOMATIS Christiand Christiand; Reinaldo Khowanto; Makdin Sinaga
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 12, No 2 (2018): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

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Abstract

The management (pick and place activities) of traffic cones (KLL) is generally performed in traditional way where the operator of KLL management picks and places KLL by using their body power. Therefore, the speed and effeciency of the task greatly depends on the power, stamina, and skill of the operator. Furthermore, in the case of KLL management at toll roads, the speed of task completion may vary because of stamina decreasing and huge number of KLL. Improving the speed and efficiency of the task is absolutely needed. One of the goals is to reduce the time of task completion as well as the power consumption of the operator. Electric motor may be used as the solution to achieve faster and effective KLL management. In this research work, a semi-automatic KLL pick-n-place machine is proposed to solve the problem. This machine uses DC motor to reduce the human power. In addition, a semi-automatic controller is designed to reduce the human role in the work sequence of KLL pick-n-place machine. Mechanical design of the machine is carefully formulated by taking into account the aspects of carrier (truck) type and the strength of build-material. The concept of the design is simple yet tough. The machine is designed to be flexible in mounting position whether it is mounted in the left or right side of the carrier deck. From the experiment, the maximum speed of the carrier when managing the KLL was ± 10 km/hour.
RANCANG BANGUN ALAT PENGADUK ADONAN BUBUR ORGANIK KAPASITAS 7 LITER UNTUK INDUSTRI UMKM Ahmad Yunus Nasution; Gunawan Hidayat
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 12, No 2 (2018): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

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Abstract

In today's era that is sophisticated and requires speed in the industrial world, humans are required to make and design various tools to get maximum results compared to the manual work of human strength. As an example that can be done instantly and without the need for human labor in the industrial world is the design of a slurry mixer, so that when cooking and stirring the slurry can be faster and more efficient. One of them during the stirring process can reduce the amount of production costs for employees. This study aims to plan and make a transmission and rotation system on a 7 liter capacity slurry mixer for umkm. As for the background of this research because Indonesia is one of the countries that has many SME sectors that have very large opportunities to be developed in the future. This study uses calculations for the slurry stirrer transmission system. The calculation includes an electric motor with a power of 1hp output speed of 1400 rpm with a gearbox ratio of 1:20 and with the size of the drive pulley is 2 in or 50.8 mm and the drive pulley is 4 in  or 101.6 mm, the final speed is 35 rpm. The belt used is a V type A belt with a length of 914 mm. The shaft used is 25 mm in diameter with SS304 material.
ANALISIS PERANCANGAN ALAT KHUSUS UNTUK PEMASANGAN SUSPENSI BELAKANG PADA UNIT HD785-7 Rasma Rasma; Hendro Purwono; Riki Effendi
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 12, No 2 (2018): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

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Abstract

General Overhaul (GOH) is so much on the HD785-7 unit that it requires speed, accuracy, and discipline during the process so that the target can be met. Slow speed is influenced by several factors, one of which is the process of installing rear suspension. Now the rear suspension installation process is carried out by 6 manpower using belt-shaped tools that require installation time of ± 2 hours (1 piece) so that it is considered inefficient and unsafe for mechanics. The purpose of this research is to design special tools so that the process is faster, safer, and the number of mechanics decreases. The method used in this study is Seven-Ups ++ Innovation Method so that innovation activities can run in rules and produce optimal output. The results obtained from the design of this special tool is that the rear suspension install process is only carried out by 3 manpower, is safer, and the installation time is ± 30 minutes (1 piece).

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