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INDONESIA
Traksi : Majalah Ilmiah Teknik Mesin
Published by Universitas Muhammadiyah Semarang
ISSN : 16933451     EISSN : 25799738     DOI : -
Core Subject : Science, Engineering,
Energy Engineering
TRAKSI (eISSN 2579-9738 / ISSN 1693-3451) adalah Majalah Ilmiah Teknik Mesin Universitas Muhammadiyah Semarang (UNIMUS) dengan cakupan bidang material teknik, konversi energi dan manjfaktur. Jurnal ini terbit 2 kali dalam satu tahun.
Arjuna Subject : -
Articles 220 Documents
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ANALYSIS OF THE EFFECT OF BRAKING LOAD ON DIESEL ENGINE PERFORMANCE Muchlisinalahuddin, Muchlisi muchlis
TRAKSI Vol 24, No 1 (2024): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.24.1.2024.61-72

Abstract

Now, the automotive, especially in diesel engines, is experiencing a development. The use of diesel engines nowadays is also increasing because the fuel consumption of diesel motorbikes is more efficient when compared to petrol motorbikes. Meanwhile, the disc braking system has become a common choice in motorized vehicles, because when compared to other braking systems. However, the impact of loading on the performance of diesel engines with disc braking systems on motorbikes still requires more in-depth research. The research method used is the test and comparison method, where a diesel motorbike is tested by adding a load in the form of motorcycle braking and comparing fuel between dexlite and diesel. The test results between diesel fuel and dexlite showed that dexlite fuel was better than diesel fuel. The addition of load results in a decrease in engine speed, where the rotation produced by dexlite fuel is greater than diesel fuel, while the torque and power of the engine will increase where the torque and power produced by dexlite fuel is greater than diesel fuel and the ratio between diesel fuel and dexlite shows that dexlite fuel is more efficient than diesel fuel.
RELIABILITY BASED MAINTENANCE ANALYSIS OF THE MAIN ENGINE LUBRICATION SYSTEM OF THE KM-KELIMUTU SHIP Yudo, Hartono; Dwi Putra Naya, Radityo Habil
TRAKSI Vol 24, No 1 (2024): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.24.1.2024.133-146

Abstract

The main engine on KM. Kelimutu operates with the help of KM. Kelimutu ship system itself. The exitences of  a system that can be considered very critical is lubrication system of the main engine. The lubrication system for the main engine of KM. Kelimutu itself has task of the supporting the smooth operation of the main engine by distributing good lubrication and in accordance with the main engine indicators. Failure of this lubrication system will have a negative impact on the main engine, therefore the purpose of this study is to analyze the KM. Kelimutu lubrication system with the reliability method. In this study, the reliability method used to analyze the lubrication system uses qualitative analysis and quantitative analysis. Qualitative analysis using Failure Mode and Effect Analysis (FMEA) and Fault Tree Analysis (FTA). Meanwhile, for quantitative analysis by conducting a Monte Carlo simulation. The results of this study indicate that the most critical component in KM. Kelimutu lubrication system is a filter with an initial Risk Priority Number (RPNi) value of 592, and if the component have 2 pieces such as a filter, transfer pump, Lo pump, and also a Lo separator have failed.  The results of the simulation show Availability is 0,96 and MTTF (Mean Time to Failure) is 697,76082.
EFFECT OF DOUBLE CHAMFER ON TESILE STRENGTH AND MICROSTRUCTURE OF AISI 304 FRICTION WELDING JOINTS Penggalih, Bagus Samodra
TRAKSI Vol 24, No 1 (2024): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.24.1.2024.1-11

Abstract

Friction welding is a metal joining process without melting (solid state process), in which the welding process occurs as a result of combining the rotation rate of one of the workpieces with the compressive force exerted by the rotating workpiece. The friction caused by the meeting of the two workpieces will produce heat which can melt the two ends of the workpiece which are rubbing together so that they are able to melt and finally the joining process occurs. In this study, Continuous Drive Friction Welding (CDFW) was carried out on AISI 304 metal materials. This study aims to determine the effect of double chamfers on the tensile strength and microstructure of AISI 304 friction welding joints. The chamfer angle variations used are 15°, 30°, and 45°. The results of the tensile test show that chamfering can affect the results of the tensile strength. The highest tensile strength value was obtained at a chamfer angle of 30°, namely 454.9Mpa. Meanwhile, the lowest tensile strength value was obtained at the 45° chamfer angle variation, which was 193.5 MPa. The results of the microstructure test show that the chamfer angle has an effect on changes in the microstructure. At all variations of the chamfer angle, the microstructure of the weld area has perlite and ferrite fine grained phases, the HAZ region has perlite and ferrite phases larger and finer grained. Also found in all variations there is porosity. The greatest porosity is found at a chamfer angle of 45°.
PERFORMANCE TEST OF THE AIR-COOLED CHILLER SYSTEM USING HCR 134a REFRIGERANT IN CONDENSER OUTPUT TEMPERATURE 30°C Arozi, Moh
TRAKSI Vol 24, No 1 (2024): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.24.1.2024.73-85

Abstract

This experimental test aims to determine the effect of increasing the output temperature from the evaporator (T1) on a constant output temperature from the condenser (T3) on the performance of the piston hermetic compressor in the Air-Cooled Chiller vapor compression system, namely compressor power, refrigeration capacity and Coefficient of Performance (COP). ). This test uses HCR-134a as the main refrigerant and water as the secondary refrigerant. Data collection was carried out at the output temperature from the condenser (T3) = 300C with variations in the output temperature from the evaporator, namely -40C to 100C. Information recorded at each stage of the experiment includes temperature and pressure at the outlet of the evaporator, compressor and condenser, as well as voltage, electric current and refrigerant flow rate. The instruments and equipment used are an Air-Cooled Chiller with a piston hermetic compressor as the main test tool, a digital thermometer and alcohol thermometer as a temperature gauge, a high pressure gauge and a low pressure gauge as a pressure gauge and an orifice as a refrigerant flow rate gauge and a digital multimeter as a meter. voltage and electric current. To find out the thermodynamic properties of the observation data, the refprop6 program is used by entering temperature and pressure variables. From these dynamic properties, by using the Excel program, entering the existing equations, the performance values of the reciprocating piston compressor are calculated. Test results show that with an increase in the cooling load as indicated by an increase in the evaporator exit temperature (T1) from -40C to 100C at a constant condenser exit temperature of 300C, the refrigeration capacity, compressor power and performance coefficient (COP) tend to increase.
ANALYSIS OF PERIODIC SERVICE MAINTENANCE 10,000 KM FOR A MITSUBISHI XPANDER Gunawan, Reza
TRAKSI Vol 24, No 2 (2024): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.24.2.2024.%p

Abstract

Mitsubishi Xpander, a 7-passenger MPV achieved success with sales of 28,307 units or 51%, including the Xpander Cross model produced by PT Mitsubishi Motors Krama Yudha Sales Indonesia (MMKSI). This success is thanks to reliable performance, ride comfort, and fuel efficiency. Despite these advantages, regular maintenance is still required to ensure optimal performance. The purpose of writing this article is to find out the periodic service maintenance process on Mitsubishi Xpander in accordance with the procedures and standards of the Mitsubishi Lautan Berlian Utama Motors Depok workshop through the case study method. Data collection was carried out by means of observation, interviews, and direct monitoring of the maintenance stages in the workshop. The maintenance process includes an initial inspection by installing a fender cover and checking the battery, checking or replacing parts including brakes, tires, engine oil, oil filters, air filters, and AC filters. The final stage is an aftercare check using a computer scanner to ensure that no sensors are damaged. Through this maintenance, various vehicle components can be checked, lubricated or replaced to prevent further damage. In addition, regular maintenance can also identify minor faults before they become major ones, which can save on long-term repair costs. So, the 10,000-kilometer maintenance is not just a routine, but an investment in your vehicle's longevity.
THE EFFECT OF VARIATION IN PREHEATING TEMPERATURE AND HADRFACING TREATMENT ON THE PHISYCAL AND MECHANICAL PROIPERTIES OF MEDIUM CARBON STEEL Basuki, Rio; Waluyo, Joko; Huda, Saiful; Lestari, Nidia
TRAKSI Vol 24, No 2 (2024): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Welding is joining two or more metal parts by heating the metal until it melts and then adding material (electrode) to fuse like a complete object. The welding process on steel causes the metal around the weld area to experience changes in the thermal cycle, so before welding, providing preheating treatment with temperatures of 100°C, 150°C, and 200°C, then on the surface of the metal and to increase its hardness, a further process is carried out namely the hard facing process.   Hardfacing is a process where a harder material is applied to a parent material through welding. The hard-facing method is carried out by melting the HV-600 electrode wire on a plate until it obtains the desired thickness, resulting in a harder microstructural change on the metal surface. This research aims to determine the effect of preheating temperatures of 100°C, 150°C, and 200°C on the physical and mechanical properties of AISI 1040 steel material which is heat faced with HV – 600 electrodes in the Shield Metal Arch Welding process. The tests carried out in the research for physical properties were microstructure, and for mechanical properties were hardness and wear. The results of microstructure research at preheating temperatures of 100°C, 150°C, and 200°C, the magnitudes are 79.52%, 72.01%, and 68.56% respectively and the hardness values are 79.6 HRC, and 78 HRC respectively. and 75 HRC while the wear values are 0.0000587 m3/kg.m, 0.0000873 m3/kg.m and 0.0000917 m3/kg.m. From the results of this research, the optimum hardness and wear values are hard-facing with the preheating temperature of 100°C.
CHAIN AND SCRAPER BUCKET SYSTEM MAINTENANCE ON LIMESTONE RECLAIMER IN CEMENT COMPANY Paundra, Fajar
TRAKSI Vol 24, No 2 (2024): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.24.2.2024.182-193

Abstract

The chain and scraper bucket system is a one of the main components of the reclaimer limestone. The chain and scraper bucket system functions to scrape limestone material using a motor-driven bucket scraper and then directs the material into the belt conveyor. This study aims to the determine the method of chain treatment and scraper bucket system on reclaimer limestone in cement companies. The methods used in data collection are introduction and observation, interviews and discussions, literature study and data collection into field. The results of this study indicate the need for maintenance of preventive species treatment on reclaimer limestone in cement companies so that the machine can work optimally.
GEOMETRIC INSPECTION OF PRIMARY AIR FAN ROTOR BLADES USING A LASER SCANNER MEASURING INTRUMENT Dwinata, Brilliant
TRAKSI Vol 24, No 2 (2024): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.24.2.2024.194-203

Abstract

New technology related to geometry inspection instruments that have the characteristics of good accuracy, speed, and flexibility are done on Coordinate Measuring Machine. The use of a laser scanner as a measuring instrument has the advantage of the speed of acquisition so that it is suitable for inspecting components that have a complex surface. In this study, the profile measurement method in the Primary Air Fan rotor blade component which was classified as one of the turbo engines was examined. The focus of this research is the description of the tolerance inspection process line profile in general turbo engine blades, specifically the Primary Air Fan blade of the 660 MW Steam Power Plant with refer to the ISO TR 5460 using a 3D laser scanner measuring instrument. ISO TR 5460 is a technical report standard that contains guidelines for verifying geometry tolerance that are described at ISO 1101. The process of inspection of line profile geometry on turbo engine blades with 3D laser scanner measuring instruments generally works by comparing the reference data with measured data. Reference data is a CAD model while measured data is point clouds that have been carried out triangulation / meshing process obtained from the measurement results of measuring objects. The results of the inspection of the line profile tolerance on the Primary Air Fan blade indicate that in each section it was declared not passed the inspection.
DESIGN OF CONVEYOR FOR DRAINING FRYING PRODUCTS AND MIXING SKIN CRACKERS AT UMKM ADIARSA KARAWANG Aditya, Ari
TRAKSI Vol 24, No 2 (2024): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.24.2.2024.204-216

Abstract

UKM Food Karawang is a small industry engaged in making leather crackers with the main raw material being cowhide. UKM which was founded in 2004 until now produces skin crackers. On this occasion, the author tries to analyse work productivity, effective and efficient use of work tools, because productivity is continuous with the use of simple and not yet representative tools, it is necessary to design work aids to improve productivity in UKM. One way to overcome efforts to increase productivity in UKM is to carry out an analysis of every production process that occurs in UKM. After that, it can be proposed what improvements need to be made to overcome productivity deviations. From the results of research conducted on cracker UKM, there are inefficient production work steps and the use of simple production equipment which can cause inefficiency in the production of skin crackers. A lot of liquid cooking oil was spilled and the cracker seasoning was mixed unevenly during the seasoning process. The potential for inefficiency found in each process at UKM Food Karawang is in the drying process, fur removal and skin cleaning, in the process of taking raw materials, boiling, draining, cutting, frying, packaging, and in the seasoning process. Based on research, the inefficient cracker production process occurs at the stage of the cooking oil draining process and the seasoning mixing process. Things that can cause inefficiency are work tools that are not effective when draining and crackers thatare not mixed evenly during the seasoning process, so it is recommended that companies improve the condition of work tools in order to minimize losses with draining tools in the form of conveyors and spice mixers that are mechanically designed. by paying attention to the dimensions of the work space in the process of frying and powdering crackers.
DESIGN OF HYDROSTATIC TRANSMISSION FOR DRIVING WHEELS OF FLYING CAR Pradipta, Faiz Akbar
TRAKSI Vol 24, No 2 (2024): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.24.2.2024.147-165

Abstract

A flying car can fulfill two functions, as a vehicle on the road and as an airplane that capable of flying. To reduce aerodynamic drag, the drive wheels must be able to fold so that a flexible transmission system is required. The Hydrostatic Transmission (HT) system is a flexible transmission that uses a hose to connect hydraulic pump, which is coupled to the engine, to hydraulic motor, which is coupled to the wheel. This research analyzes the specifications of hydrostatic transmission components to optimally transmit power from a V6 engine to two drive wheels through a speed gear transmission system. The hydrostatic transmission system specifications, which include pumps, motors, hoses, charge pumps, and release valves, are simulated and analyzed using Simscape Matlab software. This software enables the user to easily modify the parameters to build an optimal hydrostatic transmission design. The results are obtained, to ensure optimal performance of the entire flying car propulsion system, a 233kW pump and 256 kW motor are required. The hydraulic pump is a variable displacement that has at least 100cc/rev of maximum displacement with 350bar working pressure. The hydraulic motor is fixed displacement that have requirements at least 80 cc/rev of maximum displacement with 350 bar working pressure. The hose used in the flying car hydrostatic transmission has a diameter of 0.02m and is 6m long.

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