JURNAL MESIN TEKNOLOGI
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Perancangan dan analisis struktur statis terhadap fuselage versi maritim dari prototipe uav v5 produksi
Full text linkPT. Famindo Inovasi Teknologi (PT. FIT) is a company that works in the drone industry, and currently PT. FIT receives a request from Badan Keamanan Laut Republik Indonesia (BAKAMLA) to design a drone that can float on water. Therefore, my purpose is to design a fuselage of the maritime version from UAV V5 prototype produced by PT. FIT that have a lower fuselage volume of 30 liters and able to withstand a 5G loading. The lower fuselage is designed at 30 liters because the mass of the finished drone is 25 kg. The design will include the shape of the fuselage, rib structure and support structure. After the design is complete, the next step is simulation using Solidworks with static simulation features. The fuselage simulation is done with a mesh size of 8 mm according to the mesh independence test method and 5G loading. The result of the fuselage simulation shows a maximum stress of 17.142 MPa and a maximum displacement of 0.614 mm, so the fuselage of the maritime version from UAV V5 prototype produced by PT. FIT design can be declared as safe
Optimization of compressor work, power and heat on efficiency refrigerant r290 on split ac
Full text linkThe vapor compression cycle refrigeration machine is the type of refrigeration machine that is most widely used today, generally the medium used as a working fluid that transfers heat from the product being cooled to its environment is a synthetic refrigerant. The working fluid is called refrigerant. Refrigerant is the main working fluid used in air conditioning systems to absorb heat and convert it in the refrigeration system. This then encourages countries in the world including Indonesia to then jointly carry out prevention and improvement by making agreements. Then this agreement was known as the Vienna Convention in 1985 followed by the Montreal agreement in 1987. In order to reduce the impact of ODS (Ozone Depleting Substances), in 1992 Indonesia signed the Montreal protocol. At that time, Indonesia also launched the "Indonesian Country for the phase Out of Ozone Depleting Substances (ODS) under the Montreal Protocol". This study aims to compare the work of compression, heat absorbed, and the electric power used by the split type refrigeration machine between refrigerant R-22 and refrigerant R-290. These results and analysis show that R-290 has a higher value than R-22 in compression performance. R22 power consumption is 0.30 kw and R290 is 0.26. R290 this is influenced by the light work of the compressor so that it will have an impact on electric power consumption. The power consumption of R290 is 42% less than R22. The heat absorbed by R 22 is smaller than that using hydrocarbons. The results of the optimization of compressor work, power and heat variables show an effect on efficiency
Perancangan dan analisis kekuatan statis pada fixed-portable hydraulic scissor car lift platform dengan kapasitas 2 ton
Full text linkThe large number of vehicles (cars) currently available causes an increase in demand for vehicle services and maintenance. Required availability of equipment that results in effectiveness and efficiency in its maintenance. The scissor lift model was chosen because it is portable and does not require much space for use in workshops. The design of a lifting device that uses a scissor lifting type hydraulic system that can be used fixed-portable for MPV type vehicles or vehicles weighing under 2 tons was carried out. The designed platform is then calculated and analyzed for its structural strength using FUSION 360 and FTOOL software. The calculation results show that the total stress is less than the permissible stress , then the material meets the strength requirements () and is declared safe. From the FEA Stress Von Mises simulation results, the total stress on the structure is smaller than the material stress. Due to the calculation using = 1.5 and the safety factor from the simulation results is greater than the safety factor used in the design, the design meets the strength requirements and is declared safe
Optimization analysis of production capacity on trimming process for passenger vehicle with a learning curve approach (case study: car os)
Full text linkThe primary goal of this research to optimizing the production process capacity is expected to answer basic problems of how steps taken by the manufacturing industry to produce effective output. This study used a technique Research Design case study, namely in the automotive manufacturing industry in the process of assembling a car OS in the Trimming Process PT. XYZ. This study refers to the technique of quantitative research methods of data collection by interview and sampling cycle time by using stopwach. There are 5 models used in this research is, a) Learning Curve Approach, b) Time study c) The model of productivity to measure productivity Actual and after the application of the standard time Productivity Model, d) Efficiency and Efectivity Model. Results of this study found a) Learning Curve Effect on the curve for each station, the end effect of learning curve for operators learning process average in the assembly process units to 11 – 16 with learning rate between 88% - 94% for each stations, b) Standard time for assembly process OS is 215.17 minutes/units with the effective capacity 5.18 units / hour, c) Estimate the productivity level obtained when applying the standard time is 5.18 higher than the actual productivity is 2.45, d) the level of efficiency that can be achieved in the application of standard time is 4.7%, e) Identification of factors that affect the speed of the operator skill then found five factors that according to the operator (the respondents) that affect their work, the machine does not automatically chosen 95% of respondents, many elements of the work carried out by manual as much as 85% and 80% respectively of respondents choose the layout, engine support and salaries / wages are still not standard than other same industry
Wear resistance of abradable-conductive powder deposited by using hvof with different surface preparation and spray distance
Full text linkAlong with many material failures due to worn steel components, HVOF (High Velocity Oxygen Fuel) coating based abradable material can be solution to overcome this problem. However, abradable-conductive material is still rarely used for coating, therefore it needs investigation to find out the optimum parameters of process. In this work, the surface treatment on substrate was carried out by the different methods such blasting, etching, and blasting-etching to obtain the rough surface. The spraying distance of HVOF process was varied on 20 cm and 30 cm. Blasting-etching are able to achieve the roughest surface of substrate. Meanwhile, the spray distance of 20 cm produces thicker layer than the longer spray distance. The combination of blasting-etching and the shorter spray distance are able to reach the optimum wear resistance as presented in pin-on-disc test
Unjuk kerja catalytic converter katalis tembaga krom terhadap penurunan temperatur emisi bas buang motor bensin
Full text linkCatalytic Converter is a technology used to reduce air pollution which is installed in the exhaust gas (muffler) of gasoline motorized vehicles. This Catalytic Converter serves to accelerate the oxidation of Hydrocarbon (HC) and Carbon Monoxide (CO) gas emissions, as well as to reduce Nitrogen Oxide (NOx). Changes in exhaust emissions mentioned above are strongly influenced by the working temperature of the Catalytic Converter. Chrome Copper metal material as a catalyst material, will be investigated and tested on a laboratory scale, first to see the effect of changes in engine speed to temperature, secondly changes in temperature when using a Catalytic Converter with a Copper catalyst and thirdly changes in temperature when using a Chrome Copper Catalyst in the exhaust gas channel . The results of the study were first obtained that changes in engine speed affect the increase in temperature of the Catalytic Converter, the higher the engine speed the temperature rises and vice versa at low engine speed the temperature tends to decrease. The two installations of the Catalytic Converter caused the temperature to drop, at 3000 rpm engine speed (without the Catalytic Converter) the temperature was 317.5 ºC and fell to 227.36 ºC in 5 catalyst cells, 218 ºC in 10 cells and 230 ºC in 15 cells. (with Cu Catalytic Converter). Whereas in the installation of a Chrome Copper Catalytic Converter, at 3000 rpm engine speed (without Catalytic Converter) the temperatur of 317.5 ºC drops to 237.5 ºC in 5 catalyst cells, 240.84 ºC in 10 cells and 249 ºC in 15 cells, where the decrease in temperatur that occurs is higher with the use of a copper catalyst
Penambahan sr pada aluminium paduan a356 dengan metode lost foam casting (lfc)
Full text linkThe casting process and cooling rate determine the morphology of the authentic silicon particles produced in aluminum alloys. The slow cooling rate of aluminum alloy through the Lost Foam Casting (LFC) method a result of low mechanical properties. The purpose of this study was the effect of added Strontium (Sr) modifier to aluminum A356 on the microstructure and mechanical properties of the LFC method. The Aluminum A356 alloys are melted using a crucible and poured at a temperature of 730 oC on the surface of the polystyrene pattern which has been coated with refractory materials. The addition of the Strontium modifier was studied for its effect on changes in microstructure and mechanical properties (hardness, impact strength, and tensile strength). The results of this study indicate a change in the authentic silicon particles from an acicular to a filamentous form. The value of hardness, maximum tensile strength, and impact strength on the castings increased after the addition of Sr modifier to aluminum alloy A356.The casting process and cooling rate determine the morphology of the authentic silicon particles produced in aluminum alloys. The slow cooling rate of aluminum alloy through the Lost Foam Casting (LFC) method a result of low mechanical properties. The purpose of this study was the effect of added Strontium (Sr) modifier to aluminum A356 on the microstructure and mechanical properties of the LFC method. The Aluminum A356 alloys are melted using a crucible and poured at a temperature of 730 oC on the surface of the polystyrene pattern which has been coated with refractory materials. The addition of the Strontium modifier was studied for its effect on changes in microstructure and mechanical properties (hardness, impact strength, and tensile strength). The results of this study indicate a change in the authentic silicon particles from an acicular to a filamentous form. The value of hardness, maximum tensile strength, and impact strength on the castings increased after the addition of Sr modifier to aluminum alloy A356
Rancang bangun mesin pengiris tempe otomatis
Full text linkTempe slicer is one of the food industry machines that is still developing, however, in various parts of Indonesia the machine still uses the manual method for slicing tempe as its main raw material. With that, to maximize the production of tempe by developing an automatic tempe slicer to increase the capacity of the tempeh slices. The fabrication process of this machine includes planning, drawing design, frame assembly and others. The manufacture of this automatic tempe slicer goes through various stages such as: measuring, cutting, welding, painting, assembling and testing. The tempe slicer is designed using the main actuation, namely an electric motor and a knife to slice the tempe. This automatic tempe slicer is equipped with a blade driven by a shaft that generates power from an electric motor transmitted by the pulley and v-belt.Tempe slicer is one of the food industry machines that is still developing, however, in various parts of Indonesia the machine still uses the manual method for slicing tempe as its main raw material. With that, to maximize the production of tempe by developing an automatic tempe slicer to increase the capacity of the tempeh slices. The fabrication process of this machine includes planning, drawing design, frame assembly and others. The manufacture of this automatic tempe slicer goes through various stages such as: measuring, cutting, welding, painting, assembling and testing. The tempe slicer is designed using the main actuation, namely an electric motor and a knife to slice the tempe. This automatic tempe slicer is equipped with a blade driven by a shaft that generates power from an electric motor transmitted by the pulley and v-belt
Peningkatan konduktivitas termal oli sintetis sebagai fluida pemindah panas melalui pencampuran serbuk besi
Full text linkUtilization of renewable energy that is specifically sourced from the sun is a good choice to be applied in Indonesia considering the high intensity of the sun and an even supply throughout the year. Utilization of this energy can be focused on solar thermal energy which is produced using solar thermal power. One of the most important parts of solar thermal power is the heat transfer fluid which functions to absorb the heat from the source and transfer it to a thermal load or heat engine. This research focuses on the process of changing the function of heat transfer fluid sourced from synthetic mineral oil. The choice of synthetic mineral oil has many advantages, especially in terms of price and availability. The main problem is the nature of synthetic mineral oil which has low thermal conductivity; thus, improvements are needed to increase thermal conductivity through the addition of sensible materials. Three samples of synthetic oil were prepared, namely oil 10W-30, 10W-40 and 20W-40 and mixed with iron powder in the range of 4 - 6% by mass. The 10W – 40 synthetic oil has the best heat transfer performance due to the low Total Base Number value. The addition of Fe powder (6 wt%) can accelerate the process of absorption and heat dissipation in synthetic lubricant base hybrid fluid. This research also obtains a critical line graph that can be used as a reference in determining the working balance of hybrid fluid in solar thermal system applications
Pembuatan peralatan two in one (hand sanitizer dan hand dryer otomatis)
Full text linkThe development of the Corona virus or COVID-19 in Indonesia is still developing until now. The best way of prevention to avoid the factors that can cause this viral infection, one of which is routine hand washing with soap and water or hand sanitizer. The problem is hand sanitizer that exist now always using hand power to squeeze or spray them like holding/pressing, we can think if this hand sanitizer is for the public, how many hundred hands of different people will hold it, and of course this actually causes infected with the Corona virus. Aim of the study is make two in one equipment (hand sanitizer and handdryer automatic), which means that the equipment can be used for hand sanitizer without having to hold/press/squeeze the hand sanitizer and also have the dryer. The results obtained when the fingers are closer to the hand sanitizer, it will release the liquid in ± 3 seconds, and if the liquid is a gel it will come out in about ± 5 seconds. For the handdryer, it takes ± 2 seconds to remove the hot air