Turbo : Jurnal Program Studi Teknik Mesin

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ISSN / EISSN : 2301-6663 / 2477-250X
Published by: Universitas Muhammadiyah Metro (10.24127)
Total articles ≅ 227
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Iman Syahrizal, Daud Perdana
Turbo : Jurnal Program Studi Teknik Mesin, Volume 10; https://doi.org/10.24127/trb.v10i1.1349

The process of peeling betel nuts can be done manually or using a machine. Peeling betel nuts using a machine is easier and faster than peeling them manually. This study aimed to test the performance of the dry betel nut peeler machine and to prove the effect of the number and length of peeling rods on the efficiency of the peeling. The method used in this study was a randomized design experimental method consisting of two factors, namely the number of peeling rods (12 rods; 18 rods; 24 rods) and the length of the peeling rods (1 cm; 1.5 cm; 2 cm) with nine test variations. . The parameters observed included percentage of unpeeled fruit, percentage of peeled fruit with broken seeds, and percentage of peeled fruit with unbroken seeds. The highest peeling efficiency was 88% at the interaction of the number of peeling rods of 18 pieces 1,5 cm long. The lowest stripping efficiency was 66% at the interaction of the number of peeling rods of 12, 2 cm long and the average stripping efficiency was 76%. The greater the number of peeling rods, the greater the percentage of peeled fruit. The longer the peeler rod, the greater the percentage of peeled fruit with broken seeds.Keywords: dry betel nut, peeler, efficiency.
Zaenal Arifin, Amrul Amrul, Muhammad Irsyad
Turbo : Jurnal Program Studi Teknik Mesin, Volume 10; https://doi.org/10.24127/trb.v10i1.1468

Coal is still widely used as the main fuel in the industry, especially the power generation industry (PLTU), cement plants and etc. Coal is a fossil fuel whose availability is thinning and its fires produce CO2 emissions that cause a rise in greenhouse gas (GHG) concentricity. On the other biomass is an alternative energy source that is abundant, including empty bunches of oil palm (TKKS), but has poor combustion properties compared to coal when burned directly. The properties of biomass burning can be improved by certain treatment, one of which is through the process of torrefaction. Biomass torrefaction has a calorific value equivalent to sub-bituminous coal B, so it has the potential to be used as an alternative fuel for coal. The purpose of this study was to determine the maximum temperature that occurs in the burner. In this study co-combustion was conducted on simulation of ANSYS program with powder system (pulverized combustion) because this type in recent decades is widely used in industry. In this study conducted a simulation on ANSYS to determine the temperature on the burner and the concentration of emissions produced. The results showed that the simulation of co-combustion burner burner showed the maximum temperature reached 970°C. The effect of burner and burner temperature in the form of swirl provides sufficient oxygen with more perfect combustion resulting in decreased concentration of CO2 emissions and low concentration of N2 due to higher nozzle temperature. High temperatures lower the concentration of SO2 in the burn chamber.Keyword: Co-combustion, pulverized co-combustion simulation, TKKS torrefaction, burner.
Tri Pratomo, Rina Dwi Yani, Maryono Effendi, Dovian Iswanda, Alban Naufal, Devi Andriani
Turbo : Jurnal Program Studi Teknik Mesin, Volume 10; https://doi.org/10.24127/trb.v10i1.1520

Double acting cylinders in its application are widely used in the industry and are often applied in maintenance or repair instruments. The purpose of this research is to design and make a double acting cylinder so that the movement of the hydraulic cylinder its fluid flow can be seen clearly and easily implemented in the movement process, especially in the learning process. The research employs experimental method by directly design a transparent double acting cylinder. This transparent double acting cylinder will later be applied to the hydraulic trainer. The steps taken were determining the transparent material, making material samples for tensile tests, designing and making hydraulic cylinders, conducting hydraulic cylinder tests using Autodesk Inventor 2019. From the test results of hydraulic cylinders made from acrylic using Autodesk Inventor 2019, the minimum pressure that occurs is 1,456 MPa and the maximum pressure that occurs is 6,573 MPa, in operation, the recommended pressure 1,456 to 5,551 MPa, double acting transparent cylinder which has a transparent hydraulic cylinder length of 250 mm, thickness 11.4 mm, hydraulic cylinder inner diameter 32 mm, hydraulic cylinder locking uses 4 bolts with size M8, design pressure 23 kg/cm².Keywords: hydraulic system, double acting cylinder, transparent.
Andika Wisnujati, Mirza Yusuf, Dhini Fatimah
Turbo : Jurnal Program Studi Teknik Mesin, Volume 10; https://doi.org/10.24127/trb.v10i1.1494

The development of science and technology today has a significant influence on technological development and advances in the industrial world. Casting is a product manufacturing technique in which the metal is melted in a furnace and then poured into a mold cavity that is similar to the original form of the cast product to be made. One of the results or products produced from the casting method in this study is a weaving gear component. The gear serves as a short distance power transmission based on the rotation ratio from the main shaft to the drive shaft. This study purpose to determine the effect of the quenching process with oil cooling media on cast iron material. The testing results reveal that the composition test results in 3.18% carbon content, such that the components in this gear manufacturing are used in cast iron, which essentially has the characteristics of being heat-resistant and brittle. It is also necessary to use it as a way of producing materials feeling the continuous impact. The brittling effect of quenching oil heat treatment improves the quality of the materials. It is observed from the research findings that use the Vickers hardness test that the quenching heat treatment shows a substantial difference in score. The highest Vickers hardness test score with quenching oil materials achieving a score of 427.84 VHN is seen. The test exhibits the maximum value of 378.18 VHN in raw materials.Keywords: Cast iron, quenching, chemical composition, Vickers hardness.
Masy'Ari Masy'Ari, Ari Dwi Prasetiyo, Edi Karyadi
Turbo : Jurnal Program Studi Teknik Mesin, Volume 10; https://doi.org/10.24127/trb.v10i1.1519

The manufacturing industry is one of the sectors that consistently continues to provide the largest national economic growth contribution to reach the target economic growth of 5.3% in 2020. In the 4.0 industry era, the manufacturing industry sector in Indonesia starts to adopt the newest digital technology like artificial intelligence, machine learning, and the internet of things, and additive manufacturing. This research aimed to develop a manufactured product in form of Aluminium cylinder head engine prototype with digital rapid prototyping and Aluminium investment casting. To reach the research goal, the research started from theoretical study and data collection. Next, the cylinder head engine is modelled in CAD (computer-aided design software and printed in 3D printer with polyvinyl butyral and polylactic acid. This 3D printed cylinder head is going to use as moulding pattern. Hereafter, the cylinder head engine is assembled with gating system and coated with a mix of cement plaster, silica sand, and kaolin soil. After the mould is dry, the mould will be burned until the 3D printed pattern is vaporized. The final step is pouring the molten Aluminium at 800°C temperature into the mould. The results showed that the casting process with a cylindrical gating system was perfectly formed, especially for the fins part. However, for the smaller fins, there were still defects in form of lumps. The mix of silica sand, gypsum cement and kaolin soil can create a strong mould. The difference in pattern material does not have a significant effect on the investment casting mould-making process.Keywords: Rapid prototyping, cylinder head engine, investment casting.
Asroni Asroni, Sulis Dri Handono, Tri Cahyo Wahyudi, Yogi Saputra
Turbo : Jurnal Program Studi Teknik Mesin, Volume 10; https://doi.org/10.24127/trb.v10i1.1593

Electroplating is a process of coating a solid material with a metal layer using an electric current through an electrolyte solution. The purpose of this study was to obtain the best solution pH for the thickness and adhesive strength results of electroplating, as well as the method used in various electrolyte solutions, namely pH 1.7, pH 3, pH 5, pH 7 and pH 9. The anode was used Nickel while the cathode uses ST41 Steel with dimensions of 70 mm x 50 mm x 10 mm. The distance between the anode and cathode is 10 cm and a DC current voltage of 5.5 volts with an immersion time of 20 minutes. The best coating were obtained at a variation of pH 1.7 with a result of 0.0322 mm and adhesive strength at a variation of pH 5 with a result of 26.53 MPa and pH 7 of 24.25 MPa.Keywords: Electroplating, pH variation, adhesion strength, thickness, Steel ST41, Nickel.
Deky Framasta, Akhmad Farid, Nova R. Ismail, Arief Rizki Fadhillah
Turbo : Jurnal Program Studi Teknik Mesin, Volume 10; https://doi.org/10.24127/trb.v10i1.1288

The use of natural fibers as a reinforcing material or reinforcement in composite materials has long been developed. Natural fibers are good environmentally materials in the development of engineering materials. Good environmentally materials are materials that, when used and disposed of, do not have the potential to damage the environment and harm health. Natural fibers have different characteristics and properties for each type. The bark fibers of the hibiscus tree (hibiscus tiliaceus) can also be seen as the characteristics of several factors that affect the tensile strength. This study aims to analyze the fault by knowing the direction of flow of synthetic resin input with the vacuum infusion resin method using the bark fiber of the hibiscus tree and bisphenol resin to tensile strength. The bark of the hibiscus tree was treated with 6% NaOH immersion for 120 minutes. And variations in the direction of resin flow input 1 In 1 Out, 2 In 1 Out and 4 In 1 Out. The resin used is Bisphenol. The result of the tensile test is the variation of the flow direction of 2 In 1 Out, the highest tensile stress value is 328.18 MPa, the lowest tensile stress is the variation in the flow direction of 4 In 1 Out with a value of 271.17 MPa. The fault model of all variations in the flow direction is multiple areas, as well as fiber pull out in the 1 In 1 Out and 4 In 1 Out flow directions. For 2 In 1 Out delamination fault mode.Keywords: Composite, hibiscus bark fiber, resin flow direction, vaccum infusion resin.
Kuntang Winangun, Muh. Malyadi, Achmat Rifay
Turbo : Jurnal Program Studi Teknik Mesin, Volume 10; https://doi.org/10.24127/trb.v10i1.1537

Fossil fuel is a non-renewable fuel. It is necessary to find alternative energies by converting coconut shell waste, peanut shell waste, and soybean shell waste into briquettes. This study aims to utilize agricultural waste and determine the test parameters for the value of ash content, moisture content, temperature, flame duration, and calorific value of the briquette mixture of peanut shell, soybean shell, and coconut shell with variations in composition. This research was carried out by converting coconut shell, peanut shells, and soybean shells into charcoal with a carbonization process for 3 hours, the all waste charcoals were pulverized and sieved with a 60 mesh sieve, mixed with the addition of 10% tapioca flour adhesive, printed with a pressure of 250 psi. The briquettes were dried using a microwave machine with a power of 450 watts for 30 minutes. The results showed the highest value in briquette ingredient 1 with a mixture of 30% coconut shell, 50% peanut shell, and 20% soybean shell with a good moisture content value of 6.32%, an ash content value of 0.084%, a combustion heat value of 484.90C, the duration of the combustion flame was 1 hour 50 minutes 26 seconds, and the highest heating value was 7447.964 cal/g. The calorific value that does not meet the standard material 2 with a composition of 30% coconut shell, 20% peanut shell and 50% soybean shell produces a heat below the SNI, namely 4649.299 cal/g. For moisture and ash content in all materials meet the standards.Keywords: Briquettes, coconut shell, peanut shell, soybean shell.
Supandi Supandi, Edi Karyadi, Hadimi Hadimi
Turbo : Jurnal Program Studi Teknik Mesin, Volume 10; https://doi.org/10.24127/trb.v10i1.1447

Liquid-gas ejector is an energy conversion device capable of flowing air fluid by utilizing water fluid based on the pressure difference between the two fluids without using moving parts. This study aims to determine the effect of changing nozzle spacing on the two-phase flow on the performance of the liquid-gas ejector. The method used is to carry out an experiment whose stages include: determination of nozzle spacing parameters, primary flow rate, and secondary flow rate. Then perform tests on the liquid-gas ejector installation and collect data. The test was carried out by alternately varying the nozzle spacing, primary flow rate, and secondary flow rate. Then analyze the data that has been collected to get the efficiency or performance of the liquid-gas ejector from changes in nozzle spacing. Increasing the nozzle spacing causes a decrease in the efficiency of the liquid gas ejector. The efficiency of the liquid gas ejector with nozzle spacing 5, 10, 15, 20, and 25 mm is 17.17%, 13.49%, 12.06%, 11.41, respectively. %, and 10.47%.Keywords: Nozzle spacing, flow, two phases, performance, liquid-gas ejector.
Suhendra Suhendra, Feby Nopriandy, Irma Fahrizal
Turbo : Jurnal Program Studi Teknik Mesin, Volume 10; https://doi.org/10.24127/trb.v10i1.1433

Rice quaker are traditional food from the Sambas regency. The manufacture of rice quaker has been traditionally done by pounding it. Economically, the production capacity of traditionally made rice quaker is so low that it needs to be increased by changing the manual to mechanical flattening system. The purpose of this research is designing a prototype machine for flattening rice quaker as well as conducting experimental studies on the flattening process. The research stages were to design, manufacture, and test the performance of the flattening rice quaker. The independent variables of the study were the gap width and the number of flattening, while the dependent variables of the study were thickness and percentage damage of rice quaker. The width of the gap was varied into 0.4 mm, 0.6 mm, 0.8 mm, and 1.0 mm, while the number of flattening was varied to 1, 2, and 3 times the flattening. The result of the construction of the prototype rice quaker machine is in accordance with the initial design, and can work to flatten rice quaker. The engine test was carried out at a flat roller speed of 360 rpm. The thickness of the rice quaker made traditionally, 0.98 mm, can be approached by flattening using a machine at a gap width of 0.8 mm with 2 flakes resulting in a thickness of 0.96 mm quaker with a percentage of damage of 38.52%. In general, the level of damage to the resulting rice quaker is still very high, so further analysis is needed.Keywords: Rice quaker, gap width, flattening machine, flat rollers.
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