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INDONESIA
Jurnal Konversi Energi dan Manufaktur
Published by Universitas Negeri Jakarta
ISSN : 23392029     EISSN : 26225565     DOI : https://doi.org/10.21009/JKEM
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
This journal aims as a medium for lecturers, researchers and practitioners to discuss result of their research in the field of mechanical engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 9 Documents
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Search results for , issue "Vol. 7 No. 1 (2022)" : 9 Documents clear
PENGARUH PENCAMPURAN BIOETHANOL SEBAGAI BAHAN BAKAR TERHADAP PERFORMA MESIN DAN EMISI GAS BUANG PADA MOTOR BENSIN EMPAT LANGKAH SATU SILINDER Darwin Rio Budi Syaka; I Wayan Sugita; Cahya Raiza Mahendra
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.1.7

Abstract

Indonesia'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).
ANALISIS PERAWATAN PADA KOMPONEN MESIN DEGREASER DI PT X Ferry Budhi Susetyo; Ragil Sukarno; Khulaifiyah
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.1.3

Abstract

In 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.
FENOMENA KEKERASAN, IMPAK, DAN STRUKTUR MIKRO BAJA 0.074 wt.% KARBON PASCA QUENCHING COOLANT Basori; Agung Iswadi
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.1.5

Abstract

In 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.
KEHILANGAN MASSA LAPISAN TEMBAGA-NIKEL/TEMBAGA-NIKEL-SILIKON PADA LARUTAN HCl Siska Titik Dwiyati; Muhammad Teguh Pangestu; Syamsuir
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.1.4

Abstract

The purpose of this study was to determine the effect of variations in the electroplating time of copper-nickel and copper-nickel-silicon on the corrosion rate of low carbon steel. Copper-nickel and copper-nickel-silicon electroplating were carried out for 10, 20, and 30 minutes. Then the corrosion test was carried out using the weight reduction method for 60 minutes, but every 15 minutes the sample was weighed to see the mass lost. The corrosion rate of copper-nickel plating specimens on low carbon steel in a 3.5% HCl corrosive solution at a plating time of 30 minutes has the highest resistance compared to other time variations of copper-nickel specimens, namely the 15th-minute mass loss of 0.0022 grams. , the mass loss of the second 15 minutes (30 minutes) was 0.0014 grams, the mass loss of the third 15 minutes (45 minutes) was 0.0014 grams, and the mass loss of the fourth 15 minutes (60 minutes) was 0.0021 grams. The corrosion rate of copper-nickel-silicon plating specimens on low carbon steel in a 3.5% HCl corrosive solution at a plating time of 20 minutes has the highest resistance compared to other time variations, namely mass loss in the first 15 minutes of 0.0021 grams, mass loss The second 15 minutes (30 minutes) was 0.0008 grams, the mass loss in the third 15 minutes (45 minutes) was 0.0013 grams, and the mass loss for the fourth 15 minutes (60 minutes) was 0.0015 grams.
HUBUNGAN PENERAPAN SOP SERVIS RINGAN (TUNE UP) SEPEDA MOTOR TERHADAP KINERJA MEKANIK BENGKEL DI JAKARTA Adi Tri Tyassmadi; F. Supriadi; V. Faiz Akbar
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.1.2

Abstract

This 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.
KEKERASAN DAN KETAHANAN KOROSI LAPISAN KERAS DI ATAS PERMUKAAN BAJA KARBON Yunita Sari; Akmal Nashrullah; Sopiyan
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.1.1

Abstract

Low carbon steel is widely applied to make heavy equipment, such as bucket excavators because it has a combination of material properties such as strength, ductility, corrosion resistance, and good formability. The use of this excavator bucket requires high strength and high corrosion resistance. Because the excavator bucket always rubs against the ground, it is necessary to do hard facing to increase the hardness of this excavator bucket. This research examines the effect of coating and heat treatment on low carbon steel to increase hardness and corrosion resistance. The plating process uses manganese alloy steel and chrome alloy steel, then heat-treated to a temperature of 1000°C and holding time for 10 minutes, then cooled using water media. From the test results, it was found that coating using chrome alloy steel has higher hardness and corrosion resistance than coating using manganese alloy steel because chrome is harder and corrosion-resistant than manganese.
PENGARUH VARIASI TEKANAN SANDBLASTING TERHADAP LAPISAN HASIL POWDER COATING Syamsuir; Yos Nofendri; Boy Martino; Naufan Erzha Sulistiono; Galih Panji Saputro; Ihsan Ady Prasetyo; Afdhal Fuaddy
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.1.6

Abstract

The problem of motor vehicles made from low carbon steel is corrosion. Almost all automotive components require coatings with the aim of protecting structures that are generally made of carbon steel from corrosion attacks. There are many techniques in painting, one of which is the powder coating technique, which is powder paint (powder) which can be loaded with static electricity to facilitate the process of painting using objects made of metal. Surface preparation needs to be done before the powder coating process is carried out. The most common preparation is by sandblasting, administration of phosphoric acid, or sandpaper. From the three preparations mentioned, the sandblasting method can be adjusted so that the pressure can get the desired roughness. So in this study, the effects of sandblasting pressure (4,5, and 6 bar) on the powder coating layer will be discussed. From the research that has been done, specimens with a pressure of 5 bar showed the highest abrasion resistance and contact angle.
ANALISIS KEAUSAN SHAFT PADA FRONT IDLER EXCAVATOR (BACKHOE) HITACHI TIPE EX-100 Kurniawan Rahmat Widodo
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.7.1.8

Abstract

Backhoe 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.
COVER AND PREFACE JURNAL KONVERSI ENERGI DAN MANUFAKTUR VOL. 7 NO. 1 (2022) Jurnal Konversi Energi dan Manufaktur Editor's
Jurnal Konversi Energi dan Manufaktur Vol. 7 No. 1 (2022)
Publisher : Universitas Negeri Jakarta

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

Abstract

Sari 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.

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