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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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CFD SIMULATION OF THE USE OF AIRFOIL BASED BLADES ON THE PERFORMANCE OF A 2 BLADE SAVONIUS TURBINE Rendi R
TRAKSI Vol 23, No 1 (2023): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.23.1.2023.%p

Abstract

Wind turbine is one of the alternative power generation equipment that can be developed as a power plant in rural areas which has a potential wind speed of 2-6 m/s. The most ideal type of wind turbine to be operated at slow wind speeds (2-6 m/s) is the Savonius rotor type turbine, but unfortunately this type of turbine has a weakness, namely its relatively low efficiency. The purpose of this research is to study the performance of the turbine with the development of new airfoil-based blades and the characteristics of the fluid pattern around the blades. The method used in this research is to simulate a turbine with ANSYS Fluent R2020. The results showed that the maximum tsr was 0.6 giving the highest Cp 0.14.
EFFECT OF SPINDLE ROTATION IN TURNING HIGH CARBON STEEL USING HSS LATHE BLADES ON SURFACE ROUGHNESS AND INTEGRITY OF LATHE BLADES Muhamad Jafri
TRAKSI Vol 23, No 1 (2023): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.23.1.2023.%p

Abstract

This experiment aims to determine the effect of spindle rotation on medium carbon steel turning using an HSS knife, the roughness of the object and the integrity of the blade. In the field of machining, the surface quality of an object can be influenced by several factors such as cutting speed, cutting speed, cutting angle, depth of cut and the material used in the turning process. A good lathe knife must have certain properties, so that later it can produce products with good quality (right size) and economical (short time required). The spindle lathe speed set by the workshop technician for fine-working medium carbon steel is 200 rpm. However, if analyzed using the existing theory, the spindle rotation for medium carbon steel is obtained and for the same HSS lathe, the spindle rotation is 1600 rpm. This can result in surface roughness and defects in the lathe blade, which can vary from small to large. The results showed that the inappropriate selection of spindle rotation when turning medium carbon steel using HSS resulted in defects in the lathe. Defects in the blade affect the surface roughness of the object.
BEVEL GEAR DESIGN FOR DIFFERENTIAL TRANSMISSION ON THE MIO M3 125 MOTORCYCLE Daffa Surya Putra; Deri Teguh Santoso
TRAKSI Vol 23, No 1 (2023): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.23.1.2023.%p

Abstract

The gears in the transmission system only get a twisting moment, there is teeth contact between the pinion and gear. Contact between rough teeth can causing non-uniform contact forces between teeth and other teeth, caused when planning is not thorough. The design of the helical gear includes calculating the dimensions, safety factor, and stresses that occur on the machine elements. This must be considered in designing helical gears so that they can be used properly. The results of the design of the helical gear pair use a 1.5mm module, a pinion head diameter of 27.2 mm while the gear is 75.4mm, the torque that occurs is 0.84 kgf, and the stress that occurs on the pinion gear is 8.33 kgf/mm2 then the gear 21,08 kgf/mm2.
EFFECT OF PHYSICAL AND MECHANICAL PROPERTIES OF SA 333 GRADE 9 STEEL ON SMAW METHOD WELDING WITH E 7018 ELECTRODES T. Jukdin Saktisahdan; Zufri Hasrudy Siregar; Mawardi Mawardi; Abdul Latif S
TRAKSI Vol 23, No 1 (2023): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.23.1.2023.%p

Abstract

Welding is a permanent connection method; one method is MAW (Shielded Metal Arc Welding). This is welding using an electric flame in an arc to melt metal with heat. This use can be used in almost all positions and is considered relatively economical with quality depending on the user. In this study, the aims were to determine the tensile strength of SA333 grade 9 carbon steel and to test the hardness value of the base metal in the HAZ area and the weld metal. From the analysis of this study, a tensile test was carried out after welding the material, as well as a hardness test which was visualized by the macro and micro structures of the test material. This study concludes that the results of tensile testing on SA333 grade 9 carbon steel Raw Material have a maximum value of 6450 and a fracture stress of 4900 MPa, as well as the hardness value on the base metal, the HAZ area, and the weld metal area has the highest hardness value of 4530 HVN compared to of base metal and HAZ.
ESTIMATED TIME FOR CUTTING STEEL PROFILES USING A BANDSAW MACHINE IN THE REFINERY DEVELOPMENT MASTER PLAN FABRICATION PROCESS Abthal Mahdi; Deri Teguh Santoso; Iwan Nugraha Gusniar; Boni Sena
TRAKSI Vol 23, No 2 (2023): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.23.2.2023.215-227

Abstract

Refinery Development Master Plan (RDMP) is a facility development project to increase the capacity of oil refineries, one of which is by building Pipe Rack. When making Pipe Rack with steel structure, time estimation is needed so that the fabrication process flow can run according to the planned time. One of the fabrication processes is the process of cutting profile steel using a Bandsaw machine. The estimated time of cutting profiled steel using a Bandsaw machine can be determined by the values that affect the cutting process so that initial data such as the value of cutting speed, feeding motion, sawblade type, and the type and dimensions of profiled steel to be cut are required. After knowing the initial data, the calculation of the estimated cutting time can be known with several equations. In the initial data, the feed motion is 5 mm / rotation with a sawblade length of 7600 mm and the dimensions of the profile steel to be cut are 400x200 mm. The machining time is 21.14 minutes with a cutting speed of 15,099.34 mm / minute. After obtaining the cutting speed value on the bandsaw machine, the estimated machining time of several variations of profile steel dimensions and different bandsaw machine feed motions can be determined. From the simulation results of several variation values of cutting speed and feeding motion, the longest cutting time is 21.28 minutes with a cutting speed of 15000 mm/minute and 47 minutes with a feeding motion of 2 mm/rotation. Meanwhile, the fastest cutting time is 10.64 minutes with a cutting speed of 30000 mm/min and 10.43 minutes with a feeding motion of 9 mm/rotation.
EFFECT OF HOLDING TIME IN THE PACK CARBURIZING PROCESS ON THE MECHANICAL PROPERTIES OF AISI 1045 STEEL Muhamad Denny Setiawan
TRAKSI Vol 23, No 2 (2023): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.23.2.2023.239-246

Abstract

This study aims to determine the effect of holding time on the pack carburizing process using mixed media from coconut shell charcoal and beef bone powder with a composition of 70% coconut shell charcoal and 30% beef bone by volume. The pack carburizing process was carried out at a temperature of 950°C with a variation of heating time of 1, 3 and 5 hours, then a fast immersion process was carried out in water. To determine the effect of time eliminated on the process, hardness and metallographic tests were carried out. The test results showed that the chemical composition of the steel sample used in this study was AISI 1045 steel with a carbon content of 0.40%. In addition, the maximum average hardness test results were obtained for the material that underwent a solid carburizing process with a 5-hour elimination time of 346 HV (Hardness Rockwell), with the phases formed in the samples undergoing the pack carburizing process were ferrite, pearlite, and Partly there is a martensite phase.
PLC-BASED WAX COATING SYSTEM PLANNING FOR FOOD PACKAGING CARTONS Taufiq Hidayat; Nidia Lestari; Joko Waluyo; Venditias Yudha; Arif Budi Asih
TRAKSI Vol 23, No 2 (2023): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.23.2.2023.162-171

Abstract

Packaging is the spearhead of marketing because it directly deals with consumers. Technological advances in the world of modern manufacturing and trading industries are competing to innovate to create the highest quality packaging. Paraffin wax coating, which is waterproof can provide resistance to packaging and the strength of a product so that protection is guaranteed against light, gas, harmful bacteria. The wax coating process without the use of large amounts of human labor requires a laminating system with a PLC program. Planning of this control system is supported by the selection of components based on the voltage on the PLC and ladder diagram simulation assistance with CX-Designer software. The simulation results of ladder diagram control system runs well and the application of ON OFF control using no NC instructions, temperature control thermostat, solenoid valve to open the valve in the chamber, and the calculation of the number of cartons that have been laminated with counter instructions and as an OFF signal on the motor.
EFFECT OF STEAM PRESSURE AND TEMPERATURE ON THE AMOUNT OF OIL PRODUCED IN A CITRONELLA OIL DISTILLATION MACHINE Zainuri Anwar; Ahmad Imam Rifa'i; Almas Nurzain
TRAKSI Vol 23, No 2 (2023): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.23.2.2023.247-253

Abstract

One of the parameters that affect the citronella oil distillation process is the pressure and temperature of the steam. The aim of this research was to determine the optimal working pressure and temperature for the distillation process. The distillation method uses the direct steam type, by varying the pressure in the boiler, namely 2 bar, 2.5 bar and 3 bar. Steam temperature increases with increasing working pressure, namely 100 - 110ºC. The raw material for citronella used  5 kg with a long distillation process of 4 hours. The test results showed that the highest amount of oil and yield occurred at a pressure of 3 bar and a temperature of 110ºC, 19 ml and 0.32%, respectively. The color of the oil produced pale yellow to brownish yellow with a specific gravity of oil at 25ºC which is 0.878 gr/ml. Citronella oil has good quality according to the SNI 06-3953-1995 citronella oil quality standards.
EFFECT OF THIOSULFATE CONCENTRATION AND LEACHING TEMPERATURE IN AMMONIACAL THIOSULFATE LEACHING OF REFRACTORY SULFIDE GOLD ORE Rini Riastuti
TRAKSI Vol 23, No 2 (2023): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.23.2.2023.152-161

Abstract

Thiosulfate as gold leach solution first studied in 1979 to found alternative of cyanide and mercury solution which are widely used in gold extraction industry although it’s negative impact for the environment. The ore sample is native ore from Bolaang Mongondow, North Sulawesi. According to Optical Microscope observation and LIBS characterization, there are pyrite compound which is one of the chacaracteristic of sulfide ore. According to X-ray fluorescence and Inductively Coupled Plasma, the ore contained about 14.62% Fe, 6.69% S, 0.15% Cu, and 0.27 ppm Au. This study aimed to determine the effect of thiosulfate concentration and leaching temperature in ammoniacal thiosulfate leaching of refractory gold sulfide ores on the solubility of gold. This research was conducted by laboratory scale of leaching method. The leaching result is then checked by Inductively Coupled Plasma (ICP). The concentration of thiosulfate (0.05M, 0.1M, and 0.2M) and the effect of temperature (250 C, 400 C, 600 C) were studied. Maximum gold extraction (62%) was obtained using 0.1M of thiosulfate concentrations at 400 C for 2 h with 20% of pulp density. Stirring speed and the pH of the aqueous solution were 400 rpm and 10, respectively. According to the results, it can be concluded that the concentration of Thiosulfate solution and leaching temperature will affect the dissolution of gold.
REDESIGN HELICAL GEAR TRANSMISSION OF MOTORCYCLE MIO M3 125 Daffa Surya Putra; Deri Teguh Santoso
TRAKSI Vol 23, No 2 (2023): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/traksi.23.2.2023.254-285

Abstract

AbstrakRoda gigi pada sistem transmisi hanya mendapatkan momen puntir, terdapat kontak gigi antara pinion dan gear. Kontak antar gigi yang kasar dapat menyebabkan ketidakseragaman gaya kontak antar gigi dengan gigi yang lainnya, disebabkan karena ketika melakukan perancangan tidak teliti. Perancangan roda gigi miring meliputi menghitung dimensi, faktor keamanan, dan tegangan yang terjadi pada elemen mesin tersebut. Hal tersebut yang harus diperhatikan dalam melakukan perancangan roda gigi miring agar dapat dipakai dengan baik. Hasil perancangan pasangan roda gigi miring diperoleh modul 1,5mm, diameter kepala pinion 27,2mm sedangkan gear 75,4mm, torsi yang terjadi sebesar 0,84 kgf, dan tegangan yang terjadi rodagigi pinion sebesar 8,33 kgf/mm2 lalu roda gigi gear 21,08 kgf/mm2. Kata Kunci : Roda Gigi MiringAbstractThe gears in the transmission system only get a twisting moment, there is teeth contact between the pinion and gear. Contact between rough teeth can causing non-uniform contact forces between teeth and other teeth, caused when planning is not thorough. The design of the helical gear includes calculating the dimensions, safety factor, and stresses that occur on the machine elements. This must be considered in designing helical gears so that they can be used properly. The results of the design of the helical gear pair use a 1.5mm module, a pinion head diameter of 27.2 mm while the gear is 75.4mm, the torque that occurs is 0.84 kgf, and the stress that occurs on the pinion gear is 8.33 kgf/mm2 then the gear 21,08 kgf/mm2. Keyword : Helical Gear

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