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Accurate: Journal of Mechanical Engineering and Science
Published by Politeknik Negeri Cilacap
ISSN : 27224279     EISSN : 27225089     DOI : https://doi.org/10.35970
Core Subject : Science, Engineering,
Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Accurate: Journal of Mechanical Engineering and Science is a peer-reviewed open-access journal with e-ISSN 2722-5089 and p-ISSN: 2722-4279 published by Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Negeri Cilacap. The journal invites scientists and engineers to exchange and disseminate theoretical and practice-oriented in the various topics include, but not limited to mechanical Engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 60 Documents
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Analisa Kerusakan Transmisi Otomatis dengan Metode Failures Mode and Effects Analysis (FMEA) dan Logic Tree Anaysis (LTA) Sodikin, Jenal; Satria Jati, Unggul; perdana wanti, linda
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i1.1510

Abstract

The power transfer system is an inseparable part of a vehicle unit, this component functions as a power source from the engine, increasing the moment generated by the engine according to the needs of the load and road conditions and reversing the rotation. Type As the age of the vehicle, the transmission it uses will be damaged or even fail to function, most automatic transmissions start having problems after the vehicle is used above 100,000 km or on vehicles that are not used in accordance with the provisions and do not carry out maintenance procedures properly, the automatic transmission is damaged. could come sooner. Based on the implementation of the Failures Mode Effects Analysis (FMEA) method which is used to evaluate components in a system by examining the potential failure model to determine the impact that will occur on the component or work system, it is found that the highest Risk Piority Number (RPN) is found in the Seal component. Piston Matic 450, Multiple Clutch/Clutch Pack 360, Selenoid Valve 324. Each potential failure model is classified based on the impact it can have on the success of the system or on user safety by dividing the categories using Logic Tree Analysis (LTA) with the results of most components automatic transmission is included in the type B failure (Outage Problem) where the component causes failure of all or part of the system. Based on the RPN value, the right maintenance is Predictive Maintenance.
Pengaruh Variasi Suhu pada Aerator 10 Watt dengan Panel Surya 80 WP Terhadap Kandungan Oksigen Terlarut Rachmawati, Putri; Agistya Anugrah, Rinasa; Ulikaryani
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i1.1512

Abstract

The fulfillment of energy for humans and animals is increasing day by day. This is evidenced by the fulfillment of electricity needs. This need is ab basic need, where humans and animals need electricity consumption 24 hours a day. So that renewable energy is needed with solar power generation for 12 hours of electricity. This research is focused on fulfilling electricity consumption in nile tilapia fish with 80 WP slar panels and 10 watt aerator power. The purpose of this study was to determine the level of dissolved oxygen in the water, the temperature in the water and the temperature in the surrounding environment. This research method uses a direct observation of dissolved oxygen with a predetermined data collection time using a dissolved oxygen measuring instrument that can be used in water. The result of this study indicate that the dissolved oxygen content produced is 14.61 mg/l with a thermal in water of 26.30C and thermal environment of around 280C.
Pengaruh Penambahan Limbah Plastik Sebagai Alternatif Pengganti Bata Beton Dinding Rumah Prabowo, Dian; Hardini, Probo; Kurniawan, Ipung; Santoso, Agus
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 1 (2022): April 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i1.1513

Abstract

The current handling of waste, especially styrofoam, plastic, used oil is not optimal, these wastes can be used to manufacture other products such as bricks with a simple process. If the waste is processed properly, it will get good economic value. To get a good value or product, it is necessary to do research or testing, as in this study, namely the use of styrofoam waste, plastic and used oil to be used as bricks. In this study, it is hoped that the public will understand and understand the quality of the types of composite bricks and ordinary types of bricks seen from their advantages and disadvantages. Styrofoam waste, plastic and used oil are mixed into bricks with a volume of 21.27%. The equipment used in this research are chopper, stirrer, digital balance and compression test machine. In this study, the results of the III (composite) molded bricks decreased the compressive strength of 59% compared to mortar and cement bricks. The results of the compressive strength test in mold III (composite) were 47.76% higher than that in mold II on composite brick. Composite III bricks are classified as quality III, namely with solid type bricks that cannot get a large load.
Rancang Bangun Energi Matahari 300 WP Sebagai Suport Energi Listrik untuk Sistem Energi Hybrid Suripto, Heri
Accurate: Journal of Mechanical Engineering and Science Vol. 2 No. 2 (2021): October 2021
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v2i2.1515

Abstract

Hybrid energy having continuous development considering the energy needs continue to increase. As the development continues, the use of alternative energy becomes a solution in overcoming energy needs. This research will be designig and manufacturing solar energy as a support for electrical energy used for a hybrid system based on solar and hydro energy. From the results of the design of the solar cell module holder frame, it produces specifications for a height of 100 cm, a width of 67 cm and a length of 90 cm, from the calculation, the pump electric energy consumption of a 125 watt32 liters / minute to fill a 1000 liter water tank is 66.7 watts, the solar cell power calculation is 33.6 watts per unit, so that the number of solar cell modules needed is 2, the design of the solar cell module made is 3 units, 1 unit is used as electrical energy saving. The test results based on solar radiation, the average solar radiation intensity is 4916 (watt/m2) with a power of 19.76 watts.
Analisa Variasi Putaran Friction Welding Terhadap Kekerasan Logam Aluminium Paduan Seri 1100-H18 Daryono; Dwi Handoko; Topan Prihantono; Ady Setiawan
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 2 (2022): October 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i2.1494

Abstract

Research in aluminum splicing continues to be improved, so that the joining process becomes easier and to increase hardness. Friction stir welding (FSW) aluminum joining process. The purpose of this study was to find out more clearly about the mechanical properties of the hardness of the specimen. The material used is aluminum alloy 1100-H18 series. The research method is friction welding with Vertical Milling as a turning tool. The tests were carried out in different rounds, namely; 660 rpm; 1115 rpm; 1750 rpm and 2720 rpm with a fixed tool feed rate of 20 mm/minute. The results of the Vickers test show that the hardness of the Base Metal (BM) area at 660 rpm is the highest at 101.4 and the lowest is 97.62 at 1115 rpm. The highest average hardness value of 94.98 occurs at 1115 rpm and the lowest is 75.18 at 2720 rpm. A significant effect on the hardness of the specimen due to the rotational speed of the tool spindle (electrode), the higher the rotation, the higher the heat generated and the rate of The slow cooling in the HAZ and SZ regions will be greater, as a result the hardness in the HAZ and SZ regions will decrease.
Rancang Bangun Mesin Uji Bending Untuk Material Komposit Fikri Adi Kusuma; Fendi Tri Hartono; Ipung Kurniawan; Roy Aries Permana Tarigan
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 2 (2022): October 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i2.1516

Abstract

The bending test machine for composite materials is a machine designed as material testing tool, especially composite materials. The objectives achieved are to design and manufacture a bending test machine as well as to test the composite material of epoxy resin and sugarcane powder based on the ratio of weight fractions. The machine design method uses the VDI 2222 method approach. From the method carried out, the results obtained from the design of the bending test machine using Solidwoks 2017. The design results of the bending test machine with dimensions of length 500 mm, width 500 mm, and height 1.400 mm, which consists of several main components including: frame; suppression system; and supports. The estimated time of the bending test machine production process takes 51,69 hours or 7 days. The results of the composite material test resulted in the bending strength of the 100% resin weight fraction of 67,71 Mpa and the 50% sugarcane powder weight fraction of 33,74 Mpa.
Perancangan Sepeda Listrik Semoli Untuk Beban 80 Kg Bayu Aji Girawan; Nur Akhlis Sarihidaya Laksana; Dian Prabowo
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 2 (2022): October 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i2.1556

Abstract

Electric bike is environmentally friendly vehicle because it doesn’t cause air pollution and it can uses electric from renewable energy sources to charge battery. Here is a lot of studies about electric bike in Indonesa, but only a few topic about electric bike for uphill climbing. In this study, electric bike will be designed for a load of 80 kgs to overcomes the uphill road at 21° of elevation. The design process contains activity such as calculation and selection of electric motor, drafting and manfacturing the frame, and riding test on flat road and uphill road at 21° of elevation. The results of design, electric bike uses 2000 watt BLDC motor, 48V 20Ah of battery, 13 teeth at front sprocket and 48 teeth of rear sprocket. From the riding test results, the bike’s maximum speed is 35 km/h reached on 5 seconds on flat road. While on uphill road with elevation of 21°, the bike’s maximum speed is 10 km/h reached on 10 seconds. The conclusion from this study that the electric bike are able to meet the needs to overcome uphill road.
Pengaruh Suhu Pre-Heat Friction Welding Terhadap Sifat Mekanis dan Morfologi Baja AISI 201 warso; Sutarno; Rivkih amanulloh; Azis satria firmansyah
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 2 (2022): October 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i2.1748

Abstract

This study aims to determine the mechanical and morphological properties of AISI 201 Steel Material. The forging pressure is 80 Psi using a rotating speed of 5600 Rpm and the preheat temperature used is 4000C, 5000C, 6000C. The method in this research is descriptive method. The test results produce an average tensile stress of 4000C preheat temperature variation of 523.1 N/mm2, 5000C preheat variation of 534.3 N/mm2, 6000C preheat variation of 566.6 N/mm2, and raw material of 696.35 N/mm2. For this reason, the largest average tensile stress in this variation of raw material is 696.35 N/mm² and from the data results obtained the average tensile strain of 4000C preheat variation is 10.83%, 5000C preheat variation is 11.05%, 6000C preheat variation is 11.73%, and raw materials 23.14%. The average bending stress of the 4000C preheat temperature variation is 21.85N/mm2, the 5000C preheat variation is 52.31 N/mm2, the 6000C preheat variation is 53.38 N/mm2, and the raw material is 117.71N/mm2. The results of the largest average tensile stress in this variation of raw material are 117.71N/mm², in the hardness test a value of 294.7 VHN is obtained and the SEM test on the specimen is the best in the HAZ area which is enlarged 5000x, 200x, and 100x, it can be seen that in the The friction welding penetration welding HAZ is completely filled with no weld defects.
Analisis Perbandingan Kinerja Refrigeran R134a dan MC-22 pada AC Split Mastur; Nana Supriyana; Warso; Sutarno
Accurate: Journal of Mechanical Engineering and Science Vol. 3 No. 2 (2022): October 2022
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v3i2.1754

Abstract

AC (Air Conditioner) is one of the cooling machines, whose use is currently increasing. One important component that helps cooling the AC (Air Conditioner) is the refrigerant. Refrigerant is a kind of material or substance in the form of liquid and gas which is usually flowed in the refrigeration machine installation. The purpose of this study was to determine the performance (COP), electrical energy consumption, and cooling rate from the use of refrigerants R134a and MC-22. The independent variables in this research are refrigerant R134a and refrigerant MC-22. The dependent variable in this study is COP (Coefficient of Performance), electrical energy consumption, and cooling rate. The control variable in this study was using time variations. The research material is refrigerant R134a and MC-22 The results of this study showed that R134a refrigerant has a better COP value than MC-22 refrigerant, where the COP value at 60 minutes for R134a refrigerant is 8.6 while for MC-22 refrigerant is 8.0. At 60 minutes the use of refrigerant R134a, the electrical energy used is 385.00 W.h. Meanwhile, 60 minutes of the use of refrigerant MC-22, the electrical energy used is 455.40 W.h.
Analisis Daya Serap Suara Material Berbasis Polyester Staple Fibre Untuk Karpet Lantai Kendaraan Joko Sumbogo, Yuliarto; Ardiansyah, Dimas; Suparno, Joko; Riski, Kautzar; Andri W.H, Dwi
Accurate: Journal of Mechanical Engineering and Science Vol. 4 No. 1 (2023): April 2023
Publisher : Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/accurate.v4i1.1791

Abstract

This research studies about the ability of the acoustic properties or absorption of the vehicle floor carpet material which consists of several forming components, with an experimental method using the tube impedance method. The components of this car floor carpet material consist of a skin section which includes a surface made of polyester staple fiber plastic fiber, binders made of latex SBR material, backing made of Polyethylene (PE) powder and the under layer made of Polyester Fiber material (PET) Silencer. The carpet material for the vehicle floor was made into three samples to determine the average of sound absorption coefficient. The sound absorption coefficient was obtained from testing the flat test sample using the ASTM E1050-98 tube impedance method. The use of Polyethylene (PE) powder as a backing for floor mats has a sound absorption coefficient with a rating of B (above 0.8) at a frequency of 3,000 Hz. While the sound absorption coefficient reaches the highest point of 0.99 at a frequency of 3,000 Hz. This is because the backing with Polyethylene (PE) powder material has porous holes. The micro surface is used as a layer of air space so that it can effectively reduce and increase the absorption of sound that occurs inside the vehicle when driving. The sound absorption coefficient of vehicle floor carpet increases significantly at low frequencies and slightly decreases at high frequencies

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