JURNAL ONLINE POROS TEKNIK MESIN UNSRAT
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APLIKASI METODE ELEMEN HINGGA PADA PERANCANGAN POROS BELAKANG GOKAR LISTRIK
Get PDFABSTRACT               Today, Society needs a vehicle a simple , inexpensive and environmentally friendly. One alternative option is an electric gokart. In the electric gokart are a rear axle which serves to move the power and spin that comes from the electric motor to the rear wheels so as to allow an electric go-karts can run. The aim of this study as follows : First, create a simulation of the finite element method with SolidWorks software to get the voltage and the maximum deflection caused by the load . Second, making calculations manually finite element method to validate the simulation results with SolidWorks software. Third , get the dimensions of the shaft for electric gokart designed by the Department of Mechanical Engineering University of Samratulangi Manado.               Finite element method simulations with SolidWorks software has gained maximum voltage results 120,212x106 Pa., and the maximum deflection of 0.00051 mm. While the manual calculation values ​​obtained displacement / maximum displacement is 0.00045 mm. Besides the results also indicate that the maximum displacement occurs at the same location or point. Thus , the simulation results have been validated by using the results of manual calculations. The dimensions of the design is the diameter of the shaft 20 mm and a length of 1000 mm.  Key word: Gokart, Finite Element Method, Simulation
ANALISIS PENGARUH CUTTING SPEED DAN FEEDING RATE MESIN BUBUT TERHADAP KEKASARAN PERMUKAAN BENDA KERJA DENGAN METODE ANALISIS VARIANS
Get PDFABSTRACT The purpose of this research is to get the influence of cutting speed variation and feeding rate variation on turning machine to work piece surface roughness. The problem in this research is how the influence of Cutting Speed and feeding rate on turning machine to work piece surface roughness with method of variance analysis. Therefore, studying the turning machine and measurement of surface roughnes with some work piece are requird. From the cutting calculation result, it is found that if cutting speed is increasing, the surface roughness is decreasing, while if feeding rate is increasing, the surface roughness is increasing. From the variance analysis with 95 % of confidence level, result of the cutting speed variation on turning machine will not give significant influence to work piece surface, and the result of feeding rate variation will give significant influence. Keyword: Cutting Speed, Feeding Rate, Turning Machine, Surface Roughnes
PERHITUNGAN WAKTU DAN BIAYA PADA PROSES PEMESINAN BENDA UJI TARIK
Get PDFA machine tool must be able to produce high-quality product. But a skilled operator also required. The process of workpiece production begins with planning a logical working steps, such as: specifying the type of machine tool’s process and selecting the materials to be used. The production process is not only related to the technology, but also related to the cost factor and the production speed to achieve the target and optimum profits. In the tensile test, the specimen is standardized according to the tensile machine that will be used. The shape of the tested specimen is essential in order to avoid cracking or facture in the grip or others areas. The purpose of this study are determining the average time of machining proces and getting the total cost of production of machining process of a tensile test specimen. The tensile test specimen were subjected on this experiment has a circular cross-sectiolan shape which made from concrete steel with the lathe machining proces. Based on the result of the process of time and cost calculation, the tensile test specimens has an average machining time of 161,733 minutes per specimen and the cost Rp. 63.483 per specimen. Keywords: Process time, production cost, the tensile test specime
ANALISIS POTENSI AIR PANAS DI BUKIT KASIH KANONANG UNTUK PENGERING GABAH
Get PDFThis study is intended to analyze thehot spring water potential at Bukit KasihKanonang by studying the influence of water level toward the water contents reduction ofunhulled rice mass after drying process has been done.Unhulled rice drying process has been examined on the dryer for five days with thevaried water level. The examination was being done in five hourseach day, starts at 9.00a.m till 02.00 p.m WITA (the local time of middle Indonesia).The result of analysis shows that the percentage of the ideal water contentreduction stand on the position level water with height 15 cm which is 72.470 %. The mostoptimal heat transfer rate of the unhulled rice stands on level 10 cm with the drying timeof 5 hours and cross-sectional size of the dryer is 50 x 50 cm.Keywords : Hot spring Water, Unhulled-Rice Drying, Drying Temperatur
PERBANDINGAN KEKUATAN PENGELASAN LISTRIK DENGAN PENGELASAN GAS PADA MATERIAL BESI SIKU JIS G3101
Get PDFThe research was to compare two types of welding, i.e. electric welding and gas welding for the strength and the yield stress of a brackets made of angle steel conform to JIS G 3101 material.The results of strength has been done by previous researcher (Tumurang, 2014), while this research doing the strength of gas welding. The research shows that electric welding gives a better effect than gas welding. The tensile stress is 33.865%better, and the yield stress is 48.843% better. It is concluded that the welding of the material JIS G 3101 brackets is more appropriate to use the electrical welding than using gases of welding. Keywords: Strength of welding, Angle steel, Tensile test
ANALISIS EFEKTIVITAS RADIATOR PADA MESIN TOYOTA KIJANG TIPE 5 K
Get PDF ABSTRACT The Function of a radiator on the car engine is to cool down the cooling fluid which arbsorbed the heat from the engine. Subsequently the heat is transferred to the air that drawned by a fan. This research aim is to calculate the efectivity of a radiator during the effort of the cooling process on the engine of Toyota Kijang type 5 K, so the engine can optimally work. This research is done at the condition of idle rotation, by recording the number of the engine rotation , the temperature of drawn and leaving the radiator. Base on the results of we may concluded that radiator works efective on the cooling process with the rotation of 1700 rpm with the efectifity number is 0.502, at rotation of 2000 rpm the efectifity number is 0.52 and at rotation of 2500 rpm the efectifity number is 0.584. Keywords : radiator, engine rotation (n), effectiveness (ϵ)
ANALISIS KEMAMPUAN DAN KEANDALAN MESIN BUBUT WEILER PRIMUS MELALUI PENGUJIAN KARAKTERISTIK STATIK MENURUT STANDAR ISO 1708
Get PDFThe aim of this research is to determine the operational feasibility of machine’s tool by testing the characteristic of static geometric based on ISO-1708 standard. The object is Weiler Primus lathe located in Sam Ratulangi (Unsrat) engineering manufacturing laboratory. Examination covered five measurements, which is harmonization to the machine base and sledge, motion alignment head move off relatively against the sledge movement, accuracy of the main spindle, alignment of rote launcher axis fuse and the axle carrier’s accuracy due to keming in the bearing press. Measurement of the five tests were done because of the limitation of measuring tools which can support the other measurements. The result of deviation value obtained from the test will be compared with allowed deviation value based on ISO-1708 standard. The measurement result of the five types of tests shows that Weiler Primus’s lathe located in Unsrat engineering laboratory is conform with ISO 1708 standard. In other words, the late posses the ability and reliability to produce a product or tool with high accuracy with an average reliability of 99,370%. Keywords: Geometric Accuracy, Machine Tool’s. Lath
OPTIMASI BIAYA PROSES KARENA VARIASI KECEPATAN DAN KEDALAMAN POTONG PADA POROS AISI-1040 MENGGUNAKAN MESIN BUBUT KNUTH DM-1000A
Get PDFThis research was aimed to optimize a lathing cost by varying the cutting speed and cutting depth. A test was perfomed on 27 steel shaft AISI-1040 test objects with diameter of 25 mm and 150 mm long each, in order to obtain the optimum cutting time and cost in a lathing process. It was found that higher the cutting speed, the lower the total production cost, while the cutting depth does not affect the total production cost. The optimum average machining time is 3.153 minute/test object and the lowest total production cost is Rp.5,653/test object. The optimization made the target to minimize the total production cost was reached in cutting speed of 1600 rpm and cutting depth of 1,00 mm, with total production cost of the lathing process of the 27 test objects as much as Rp.16,960 Keyword: Optimization, Lathe, Cutting time, Production cos
ANALISIS RASIO KETEBALAN GERAM PADA PROSES PEMBUBUTAN
Get PDFABSTRACT The purpose of this research is to analyze the ratio of the snarled thickness on a lathe machine. The problem of this research is how the influence of the snarled thickness ratio on turning process with varying cutting speed and different cutting depth. Some tests on the turning process on a number of work pieces with same material type and different cutting condition is cerried out. The result shown that higher cutting speed make snarled thickness ratio weaken, while the larger cutting depth make snarled thickness ratio increased. With a 95% confidence level variation of cutting speed will influence to snarled thickness ratio on turning process either 0.25 mm of cutting depth or 1.00 mm of cutting depth Keywords: Snarled thickness ratio, cutting speed, cutting depth, turning proces
SIMULASI PENGARUH PENGGUNAAN FILTER BUTTERWORTH PADA MASUKAN SINYAL GETARAN ACAK TERHADAP NILAI RATA-RATA MAGNITUDO
Get PDFABSTRACT Filter in this research is interpreted as screening of undesirable frequency component. In this research, the highest different percentage of magnitude for the 15, 30, 45 until 150 times of excitation can be obtained. The impact excitation signal and the random excitation signal were develop using Matlab version 6.5. The random and impact signal then filtered using Butterworth filter. The excitation of random signal was develop using Matlab version 6.5. The simulation of random signal was proceed repeatedly over 15, 30, 45 until 150 times of excitation. The simulation resulted the average numbers of filter magnitude response. Which is then compared with the impact excitation signal indicated by percentage difference. Based on the results of simulation and calculation the maximum different percentage of highest magnitude occurred in the simulation of 15 times excitation (50%). The chart of the different percentage of highest magnitude tend to be flat at the 60 times until 150 times of excitation. While the average numbers of filter magnitude response due to the random signal excitation can not be considered as same as the numbers of filter magnitude response due to the impact signal, because the difference is above 5%. Keyword: Butterworth filter, random excitation signal, percentage difference of magnitud