Jurnal Konversi Energi dan Manufaktur UNJ
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ANALISIS KEAUSAN SHAFT PADA FRONT IDLER EXCAVATOR (BACKHOE) HITACHI TIPE EX-100: Shaft Wear Analysis on Front Idler Excavator (Backhoe) Hitachi EX-100 Type
Full text linkBackhoe is one type of excavator that is widely used in agricultural and construction applications as digging, lifting, and loading equipment. The sandy and rocky backhoe work location will accelerate wear on the undercarriage components, especially on the front idler component, namely the shaft. The existing data shaft is always damaged with a usage time of less than a year. For this reason, the author is interested in analyzing shaft wear on the Hitachi front idler backhoe type Ex-100 which often occurs at the Highways Service of Kudus Regency, so that in the future damage to this track system can be minimized. Several stages were carried out in this study, including observing how the operator works and the work location of the backhoe, observing the damage that occurs to the front idler component, measuring the initial dimensions and dimensions after wear on the front idler component, namely the idler, shaft, and bushing, testing the hardness of the material. front idler component in POLINES, and data processing and analysis of the causes of damage. The front idler shaft suffers from abrasive wear which can be seen from the visible scratches at the wear site on the shaft. The maximum stress that occurs in the contact area is 2.05 kN/mm2. Shafts should have a lifetime of more than 6 years but the shaft wears 13 mm in less than 1 year. This is due to external factors, namely sand and rocks that accelerate the occurrence of abrasion on the shaft
RANCANG BANGUN PERANGKAT PENDUKUNG UNTUK PROSES PEMOTONGAN DENGAN PLASMA CUTTING: Design and Fabrication of Plasma Cutting Process Supporting Equipment
Full text linkMaterial cutting can use a tool commonly called plasma cutting. In general, the plasma cutting used today is still using your own hands or manually, and is not equipped with driving support equipment. This results in the performance of plasma cutting when cutting is not maximized because the movement is relatively not constant. For this reason, it will be designed, manufactured, and tested for cutting support equipment with a rectifier rail system for plasma cutting. In the process of making this supporting equipment, it also uses a threaded rod so that it can move forward and backward by using an electric motor. The design of supporting equipment for the cutting process begins with the creation of a plasma cutting design. Then design the mechanical and electrical components. Then calculate the plasma cutting torque moving forward and backward. Then proceed with the process of making the device and finally testing it. The trial step begins with turning on the compressor, and plasma inverter and preparing steel measuring 4, 6, and 10 mm. Once ready, then proceed with the process of cutting the material and cleaning the material. The results of the cut were then observed visually. The results obtained, that this plasma cutting support equipment can operate properly. The plasma cutting support equipment can cut steel plates with a thickness of 4, 6, and 10 mm very well
COVER AND PREFACE JURNAL KONVERSI ENERGI DAN MANUFAKTUR VOL. 7 NO. 1 (2022)
No full textSari et al., in their paper, discusses the hardness and corrosion resistance of hard facings on the surface of carbon steel. This paper aims to analyze the effect of hard facing and heat treatment on low carbon steels on increasing hardness and corrosion resistance. Tyassmadi et al., in their paper, examines the relationship between the implementation of tune-up standard operating procedure of motorcycle to the performance of mechanics in a workshop in Jakarta to know the contribution of the implementation of tune-up standard operating procedure of motorcycle to the performance of mechanics. Susetyo et al., in their paper, conducted a maintenance analysis on the critical components of the degreaser engine at PT X to determine the level of reliability of the main machine. Dwiyati et al., in their paper, carried out the weight lost the copper-nickel/copper-nickel-silicon layer of electroplating in HCl solution. The weight loss determines the effect of the time variation in electroplating coating copper-nickel/copper-nickel-silicon against the corrosion rate in low carbon steel. Basori and Iswadi, in their paper, discuss heating steel material with a carbon content of 0.074 wt. % up to a temperature of 1000 °C, then carried out variations in the holding times in the furnace for 10, 20, and 30 minutes and then quenched with coolant media to see the phenomena that occur. Syamsuir et al. carried out sandblasting with various pressures (4, 5, and 6 bar) to see the characteristics of the formed layer. Syaka et al., in their paper, mixed bioethanol as fuel to see its effect on engine performance and exhaust emissions in a four-stroke single-cylinder gasoline engine. Widodo, in his paper, analyzed shaft wear on the Hitachi Ex-100 front idler backhoe, which often occurs at the Highways Service Office of Kudus Regency, so that in the future damage to this track system can occur
HUBUNGAN PENERAPAN SOP SERVIS RINGAN (TUNE UP) SEPEDA MOTOR TERHADAP KINERJA MEKANIK BENGKEL DI JAKARTA: Relationship of SOP Service of Motorcycle Tune Up to Workshop Mechanical Performance in Jakarta
Full text linkThis study aims to determine the relationship of the application of light motor service SOP (tune-up) to Workshop mechanical performance in Jakarta. This study was conducted at 15 Workshop in Jakarta as representatives with data obtained from 45 mechanics and how big is the relationship of motorcycle tune-up service to mechanical performance. This research is a quantitative descriptive research method with regression and correlation. In this research, the percentage of application of service SOP as an independent variable and mechanical performance as a dependent variable. In this study using 45 respondents mechanics, the 45 mechanics will be a sample of research. The data collection method used is by the method of filling the questionnaire (form) on the independent variable is the percentage of application of SOP service and documents for the dependent variable is the mechanical performance. From the results of the research, it is evident that the variable (x) has a relationship to the variable (y) that is equal to 14.54% and the rest can be obtained from other factors. And between the variable (x) and the variable (y) has a positive relationship, ie the resulting value will be directly proportional
ANALISIS PERAWATAN PADA KOMPONEN MESIN DEGREASER DI PT X: Degreaser Machine Components Maintenance Analysis at X Manufacturer
Full text linkIn maintenance activities at PT. X, which is engaged in the sports equipment industry, is not doing well. So that it can reduce the targeted production results in a day. For that, it is necessary to know the critical components in the degreaser machine that cause the machine to stop. The first thing to do in this research is to select the critical components using a Pareto diagram. Based on the Pareto diagram, it was found that the chain component is a critical component with the amount of damage 4 times (11.76%). The Weibull distribution with two parameters is used to determine the time between failures so that it can be determined when to replace critical components to minimize the damage that occurs. From the calculation of the chain components, the value of the Weibull parameter is obtained from the repair time = 1.101; = 5,331 and the value of MTTR = 1,003 hours. While the value of the Weibull parameter using the operational time is = 1686.458; = 2,205 and MTTF value = 1584.748 hours. From the calculation, the reliability level of the chain components is 90% for 605.438 hours and 80% for 863.348 hours
PELAPISAN TEMBAGA NIKEL PADA BAJA DAN PENGARUHNYA TERHADAP LAJU KOROSI: Nickel-Copper Plating on Steel and its Effect on Corrosion Rate
Full text linkThe study was conducted to determine the effect of Cu-Ni coating on the corrosion rate of low carbon steel Ms 7210. The first stage of the study was Cu plating on the surface of the test sample with variations in coating holding times of 5, 10, 15, 20, and 25 minutes. The second stage is nickel plating for 10 minutes. The results showed that there was a decrease in the corrosion rate up to 0.36 mmpy when coating for 25 minutes. When compared with the raw material corrosion rate of 7.6 mmpy, the corrosion rate of steel after being coated is much lower. The longer the holding time of the coating, the thicker the layer formed, and the harder the surface that occurs, but it has an impact on decreasing the corrosion rate in the corrosive medium of 3.5% NaCl solution
PENGARUH KUAT ARUS PENGELASAN GMAW TERHADAP KEDALAMAN PENETRASI DAN KEKERASAN BAJA ST-37 PADA DAERAH HEAT AFFECTED ZONE: Effect of GMAW Welding Current on Penetration Depth and Hardness of ST-37 Steel in Heat Affected Zone Area
Full text linkThe selection of proper current is closely related to the depth of penetration of welds on metal and will affect the mechanical properties of the resulting welded joints. The purpose of this study was to determine the effect of current on penetration depth, welding width, and hardness in the Heat Affected Zone (HAZ). The research method used is experimental with currents of 180 A, 200 A, and 220 A. Welding is done on ST-37 steel using the GMAW welding technique. Penetration depth for components 1 and 2 with a current of 180 A are 0.77 mm and 0.78 mm, respectively, at a current of 200 A are 1.29 mm and 1.06 mm, and in 220 A are 1 .52 mm and 1.44 mm. The resulting welding width for 180 A is 5.86 mm, at 200 A is 6.70 mm, and at 220 A is 7.35 mm. Meanwhile, the hardness of the HAZ area shows that at a current of 180 A the hardness is 122 HV, while for a current of 200 A and 220 A the hardness is 120.5 HV. The quality standard of welded joints at each current indicates that the resulting penetration depth is more than 20%, so it can be said that the welding process has met the minimum standards
ANALISIS KEKUATAN POROS DAN RODA BERSIRIP PADA ALAT PENANAM PADI PORTABEL MELALUI PENDEKATAN SIMULASI: The Shaft and Finned Wheel Strength Analysis on Portable Rice Planters Through A Simulation Approach
Full text linkFarmers need automatic rice planting tools to increase crop yields. Currently, automatic planting tools are already on the market, but the price is relatively high, so an alternative automatic rice planter tool is needed that has a more affordable price. One of the very important components in an automatic rice planter is the shaft and wheels, so in this study focused on these two components. This study aimed to determine the strength of the shaft and finned wheels on the planter in the jajar legowo system through a simulation approach. This research method uses a simulation approach using Autodesk Inventor software which is applied to the components of the shaft and the wheel of the rice planter. The research begins with making a 3D model design, determining the shaft and wheel materials, meshing, determining boundary conditions, determining the loading position, and then running a voltage analysis simulation. The shaft material used is JIS G4501 Grade S45C steel, while the material for the wheels is JIS G3101 Grade S400 steel. The simulation results showed that the maximum von mises stress was 54.90 MPa, the maximum displacement was 0.113 mm, and the minimum safety factor value of 3.8. These results show that the shaft and wheel design on the rice planter has met the safe limit and can be continued in the manufacturing process stage
PENGARUH PENCAMPURAN BIOETHANOL SEBAGAI BAHAN BAKAR TERHADAP PERFORMA MESIN DAN EMISI GAS BUANG PADA MOTOR BENSIN EMPAT LANGKAH SATU SILINDER : The Effect of Bioethanol Mixing as A Fuel on Engine Performance and Exhaust Gas Emissions in A Four-Step One Cylinder Gasoline Motor
Full text linkIndonesia's limited fossil energy reserves trigger the emergence of the fuel crisis problem in Indonesia. To overcome the problems of fuel scarcity several ways can be done, among others, by mixing fuel and bioethanol. The use of bioethanol is one of the efforts to utilize biomass energy sources because bioethanol is an environmentally friendly alternative fuel. For this reason, the author mixed the fuel RON 88 and bioethanol with the percentage of fuel variations 100% RON 88 (E0),10% bioethanol-90% RON 88 (E10), 20% bioethanol-80% RON 88 (E20). The research method used in this study is an experimental method carried out in the laboratory using a four-stroke gasoline motor. Variations of engine speed used are 3000 rpm, 4000 rpm, 5000 rpm, 6000 rpm, and 700 rpm. Then search fuel mixture is tested alternately through a motorcycle connected to the chassis dynamometers and exhaust gas analyzer. Based on the test results, the use of bioethanol as a fuel mixture for RON 88 is proven to be able to increase power and torque and reduce exhaust emissions. The test results show that the best increase in power and torque when using a mixture of RON 88 fuels and 20% bioethanol (E20) with a percentage increase in torque of 0.1 Nm (2.12%) and a maximum power of 0.01 kW (0.53%), as well as fuel consumption. Fuel consumption decreases by 0.001 ml/second date engine speed of 3000 rpm to 5000 rpm. And the best reduction in exhaust emission testing for CO and HC levels was obtained when using a mixture of RON 88 fuel and 20% bioethanol (E20)
FENOMENA KEKERASAN, IMPAK, DAN STRUKTUR MIKRO BAJA 0.074 wt.% KARBON PASCA QUENCHING COOLANT: Hardness, Impact, and Microstructure Phenomenon of 0.074 C Wt.% Carbon Steel After Quenching in Coolant Liquid
Full text linkIn this research the process of heating the steel material with a carbon content of 0.074 wt % to a temperature of 1000°C. The steel is subject to variations in holding time in the furnace for 10, 20, and 30 minutes. Then various steel that has been held at furnace quenched with coolant media. After quenching, the hardness is measured using the Vickers hardness test and tested with Charphy's impact to know the value of energy absorption. After mechanical testing, everything was finished then proceeds with the optical microscope. The longest holding time affected decreases the hardness and, the impact value will increase. Hardness and impact value are inversely proportional to the variation of holding time that has been done. The specimens formed are ferrite and pearlite based on microstructure observation