JURNAL MESIN TEKNOLOGI
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PENGARUH BENTUK BUKAAN TERHADAP KEKUATAN DAN GETARAN BALOK
Get PDFBeam 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.
EFEK PEMASANGAN ISOLATOR TERHADAP KONSUMSI BAHAN BAKAR LPG MESIN SANGRAI BIJI KOPI INDUSTRI KECIL
Get PDFCoffee 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
RANCANG BANGUN ALAT PENGADUK ADONAN BUBUR ORGANIK KAPASITAS 7 LITER UNTUK INDUSTRI UMKM
Get PDFIn 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
ANALISA REAKTOR BIOGAS CAMPURAN LIMBAH KOTORAN KAMBING DENGAN JERAMI DAN EM4 SISTEM MENETAP
Get PDFBiogas is a gas mixture produced by methanogenic bacteria that occurs in naturally decomposable materials under anaerobic conditions. Currently, alternativf energy is needed as a replacement source of energy derived from fossil and petroleum, therefore the utilization of waste into biogas is one solution that must be developed. The purpose of this research is to obtain the characteristics of the sedentary system reactor and biogas yield. In this study biogas testing of goat waste with rice straw mixture and EM4 to produce methane gas. The results showed that the gas capacity produced was 0.1675 m3 / s and the 0.0023 kg period, on the other hand the gas pressure obtained was 19.1 N / m2 with a temperature of 36 °C. While the time required for the formation of gas that is for 5 day after the introduction of raw material into biogas reactor settled system
IMPLEMENTASI METODE QUALITY CONTROL CIRCLE UNTUK PENINGKATAN KAPASITAS PRODUKSI PROPELLER SHAFT DI PT XYZ
Get PDFPT.XYZ is a company manufacture automotive under body parts. With the policy of adding new models, so that the loading line propeller shaft 2 joint will increase, where in the production line is not sufficient with high loading production so that the production capacity is not adequate. In order for production capacity can be achieved according to target, needed improvement. In this discussion, the improvement will be related to the process of assy propeller shaft 2 joint. The method used in this research is QCC (Quality Control Circle). This method is appointed by the author for supporting the program of countinous improvement in the company. Sub assy process is a process with the highest cycle time, so the production capacity of the line propeller shaft 2 joint is not sufficient. After the observation with the QCC method of work elements sub assy process is the highest handling replacement fixture. The focal point of the improvement that will be done now is the fixture modification of the sub assy process. After improving the working elements of the handling fixture, the cycle time sub assy process decreased from 85 seconds to 70 seconds and the production line of line propeller shaft 2 joint increased from 96% to 100%
KAJI SIFAT MEKANIK SAMBUNGAN LAS BUTT WELD DAN DOUBLE LAP JOINT PADA MATERIAL BAJA KARBON RENDAH
Get PDFTechnology in the field of steel construction continues to grow rapidly, especially in design and product design. In the application of steel construction is often a process of metal grafting or often called welding. Each welding process must have a joint design that serves to obtain a good connection or pass the test according to standard or code adopted. Therefore, the selection of welded joint type is very important before welding process. The purpose of this research is to know the value of tensile strength and bend strength (mechanical properties) welding joint type butt weld and double lap joint on material ASTM SA.36. Based on the test data it is found that the highest tensile strength test is in the welded butt weld type of 49.8 kgf/mm2 compared to the tensile strength value for the weld joint double joint type of 48.65 kgf/mm2. While the value of bending strength is greater in the joint weld type double lap joint than the welded butt weld type joint both for the category of root bend and face bend
IDENTIFIKASI PENYEBAB POTENSIAL KECACATAN PRODUK DAN DAMPAKNYA DENGAN MENGGUNAKAN PENDEKATAN FAILURE MODE EFFECT ANALYSIS (FMEA)
Get PDFThe main purpose of this paper is to analyze and identify failures for minimize the risk of product defects in the production process faucet part S11037S and detect the main facto of the cause of disability that occurred. The method used with Seven Plus One Type of Waste approach and the concept of Failure Mode Effect Analysis (FMEA). Results obtained from 28 types of disability on the faucet prakuk there are 5 types of frequencies that occur high frequency that is; Gomi, Hike, Kizu, Nami and Su. From the five types of defects can be identified several causes that often occur, among the causes that there are high RPN (Risk Priority Number) that is; 1. Gomi, the dominant cause is due to operator negligence at the time of production with the value of RPN = 60, 2. Hike, with the highest cause is the entry of dirt at the time of Plotting with RPN = 24, 3. Kizu, the main cause is also from operator negligence with RPN = 36 and Nami, the cause of the duplication is that the material used has a low quality. While Su factro cause has a low RPN that is 4 to 6
PRODUKTIVITAS PERAWATAN SUMUR (STUDI KASUS DI TOTAL E&P INDONESIE)
No full textIn 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
CARA MENENTUKAN DAYA YANG DIGUNAKAN AIR CONDITIONING (AC) UNTUK KENDARAAN
Get PDFVital transportation facilities for the community to facilitate and accelerate human movement from bed more quickly, safely and comfortably. Buses with large capacity with passengers over 50 people operating between cities or between provinces require specific performance in order to provide security and comfort for passengers on the way. Bus transports between cities and between provinces are equipped with air conditioning system (AC) and some are not. In Buses that use air refreshments there is also no use of the standard main components installed from the manufacturer; such as compressors, condensers, expansion valves and others. Compressors in the air refreshing system can be analogous to the heart of the human body, which serves to suck and pump coolant (refrigerant) that circulates in the system. In this study found that there are several buses that compressor is not a standard compressor from the manufacturer. For that purpose, calculations are mainly carried out on cooling loads, achievement coefficients and compressor power
EVALUASI KONDISI MESIN BUBUT HARIZON T300 MENURUT METODE SCHLESINGER SEBAGAI ACUAN DALAM MELAKUKAN TINDAKAN PERAWATAN
Get PDFTo 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