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Riki Effendi
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SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin
Published by Universitas Muhammadiyah Jakarta
ISSN : 20889038     EISSN : 25499645     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin is an open access, peer-review journal which publishes original and review articles that advance the understanding of both the fundamentals of engineering science and its application to the solution of challenges and problems in mechanical engineering systems, machines and components. The editorial team aims to publish high quality and highly applied research and innovation that has the potential to be widely disseminated, taking into consideration the potential mechanical engineering that it could generate.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 269 Documents
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ANALYSIS OF RTRTO60K16 PKX YARN PRODUCTION PROCESS WITH OBJECTIVE MATRIX (OMAX) METHOD Supriyadi, Edi; Junaedi, Junaedi; Oktaviani, Hanni
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 15 No. 1 (2021): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.15.1.59-67

Abstract

Productivity improvement research conducted at PT. XYZ with the core problem of minimizing waste and shortening lead time with the Objective Matrix (OMAX) method. The total percentage of product damage from January to October 2019 was 28.42% and the largest percentage of damage occurred in May amounting to 1009.26 bales of production and 33.89 bales of product damage with product damage percentage of 3.36%. The lowest damage occurred in March where the damage percentage was 2.74% with the number of products as much as 945.24 bales and damage struck as much as 25.88 bales. The results of the application using the objective matrix (OMAX) method are obtained that the selected productivity criteria include: Ratio 1 (Utility working hours), Ratio 2 (Electricity energy consumption), Ratio 3 (Labor utility), and Ratio 4 (Defective product) have a red value which means performance is still below standard performance and has not reached the target.
ANALYTICAL STUDY OF THE EFFECT OF INLET ANGLE VARIATION ON HYDRAM PUMP EFFICIENCY Koswara, Engkos; Nasim, Nasim; Ariandoyo, Dodi
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 14 No. 2 (2020): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.14.2.107-111

Abstract

Hydram pump is a solution to overcome the problem of water demand, especially for highland areas. Hydram pumps can be used for rice field areas because they do not require an electric energy source. Operating parameters at the hydram pump greatly affect the efficiency of the hydram pump. In practice in the field, altitude is not difficult to obtain, especially for mountainous areas. However, for some highland areas, often to get a certain height must be with a large elevation distance hydram pump to water sources. In this research, a change in the angle of inlet variation will be conducted on the efficiency that occurs. So that with this research, it can be a benchmark for determining the distance of a hydram pump to a water source. The highest water discharge that can be generated from a 1 in size PVC hydram pump, 2.75 m inlet height, 5 m outlet height is 1.5 x 10-5 m3/s. while the lowest water discharge in the test carried out is 0 m3/s at the number of pendants 1 and the pump inlet angle is 45°. The inlet angle greatly affects the resulting flow rate. The inlet angle of 30°  results in a higher water flow rate of 1.44x10-5 m3/s at the number of pendulum 2 compared to the 45°  inlet angle which only gets 9.44x10-6 m3/s even up to 0 m3/s at the number of pendulum 1.
PUMP AS TURBINES (PATS) DESIGN OPTIMIZATION AS A RENEWABLE ENERGY SOURCE ALTERNATIVE Koswara, Engkos; Rachmat, Asep; Sumirat, Perly
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 15 No. 1 (2021): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.15.1.74-80

Abstract

One economical alternative to building a small-scale hydroelectric power plant is to use pumps as turbines, often referred to as PATs, which stands for Pump As Turbines. This research was conducted with an experimental method using a factorial experiment 22 After conducting research and data processing, Angle of Entry of Pump As Turbines and impeller tip angles Factors on turbines are equally influential to increase the speed of turning Pump As Turbines (PATs), but the variables the most influential in this study to increase the rotational speed of Pump As Turbines is the entry angle of PATs. Based on data processing to find the most influential variable using the Yates algorithm, if changing the PATs Entry Angle from 45° to 90° there will be an increase in Pump As Turbines rotational speed of 30.1 rpm while changing the impeller tip angles from 40° to 30° can only increase the Pump As Turbines rotational speed by 18.6 rpm. The alternator capacity that can be produced by Pump As Turbines is 100W, based on electrical power testing using a load of incandescent light bulbs. The electric power that can be generated by Pump As Turbines uses test samples at optimum conditions, namely the 90° Angle of Entry and the impeller tip angle 30° at the water pressure from the input pump 0.375 bar (g). The results of loading given using incandescent light bulbs with the power of 5 W, 10 W, 25 W, 40 W, and 100 W, there is the lowest voltage that is 194 V on a light bulb with 100 Watt power with alternator rotational speed of 855.7 rpm in the 3rd experiment.
NUMERICAL STUDY OF COMPARISON THE EFFECT OF FRICTION AND RESTITUTION COEFFICIENT ON SEPARATION EFFICIENCY OF CYCLONE Anggara, Fajar
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 14 No. 2 (2020): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.14.2.80-84

Abstract

Numerical modeling of cyclone on separation process was developed to increase the efficiency of collection. In terms of increasing the accuracy, this researsh was conducted to observe comparison in between the effect of coefficient of friction (COF) and restitution (COR) on the effeciency of colection. This reseacrh was using ANSYS 17 to simulate cyclone in 3D geometry. Where the variation of COR was 0,0.5 and 1 while the COF was 0,10,20 and 120. The result shows COR has not correspondence to the efficiency of collection but COF has inverse correspondence. Hence, the more friction on the cyclone surface, the more resistant sand particle to go down.
THE EFFECT OF NICKEL ADDITION ON THE MECHANICAL PROPERTIES WELDED JOINTS OF LOW CARBON STEEL Susetyo, Ferry Budhi; Sari, Yunita; Setiawidi, Yoganantya
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 15 No. 1 (2021): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.15.1.11-16

Abstract

The SMAW process is a commonly used metal joining method because it is very practical in its use, less cost, and easy availability of equipment. The SMAW process is also easy to operate and can be used in all welding positions. The problem that often occurs in steel construction lies in the welded joints. Therefore, it is necessary to increase the mechanical properties by adding nickel(Ni) to the welded joints. In this research,  electrodes E 6013 and steel of ASTM A 36 was used. The tensile tests, bending tests, hardness tests, macrostructure, and microstructure will be carried out to see changes in mechanical properties. The addition of Ni contributes well to mechanical properties. The tensile strength, face bending, side bending, and hardness increased by 27.6%, 14.5%, 4.8%, and 20.9%, respectively. In the observation of the macrostructure, the porosity was not visible in all samples, while in the microstructure observation, ferrite and pearlite phases were formed in all samples.
OPTIMIZATION OF SURFACE ROUGHNESS IN TURNING S45C CARBON STEEL MATERIAL USING THE TAGUCHI METHOD Haryanto, Muhammad Fahrudin; Khaerudin, Deni S
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 14 No. 2 (2020): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.14.2.112-117

Abstract

The value of minimal surface roughness is the performance to be achieved in the Takisawa TSL-800 lathe. Therefore, it is necessary to adjust the variables of the Takisawa TSL-800 lathe process precisely in order to obtain  a minimal surface roughness response. Determining the proper settings of the Takisawa TSL-800 lathe process variables will result in the expected surface roughness of the workpiece. The variables of the machining process that are varied are spindle speed, feed rate and depth of cut. The experimental design was determined based on the Taguchi method and was in the form of an Orthogonal L9 matrix (33).
DESIGN OF FINISHED GOODS INSPECTION ACCELERATION WITH QCC METHOD AND SEVEN TOOLS TO INCREASE PRODUCTIVITY Aprina, Budi; Ruspendi, Ruspendi
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 15 No. 1 (2021): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.15.1.43-50

Abstract

The manufacturing industry in the current era of globalization is very strict. Speed to produce products is important now, not only in terms of process. Developing a new product at PT. Surya Toto Indonesia has been running well, only in the process there are still found the exceeded of time or schedule of work plans that have been made. The preparation process for carrying out this test will take more time. Because the test aids have not been prepared or have not been grouped according to the type of finished goods or according to the series. It is necessary to analyze using the seven tool method and assisted by factor analysis to find the dominant cause and corrective action. It was found the old problem in the inspection process was the dress-up process or preparation for the test. Because the test kits are incomplete and not permanent, also the test kits do not have a storage area and lack of employee’s ability to process them. Employee education, complete equipment components, and also need to make permanent test kits and according to the specifications of finished goods. Storage area for the test kits so that it is not scattered and messy.
IMPROVING THE EFFECTIVENESS OF PRIMARY ROLLING MACHINE WITH OEE AND SIX BIG LOSSES METHOD Alfatiyah, Rini; Bastuti, Sofian
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 14 No. 2 (2020): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.14.2.85-93

Abstract

Each company wants to improve the efficiency of the production process so that it can compete in terms of price and quality with other companies. The company that is the object of this research is engaged in electronics manufacturing. The problem that occurs is the difference in production results between the company's target and the reality that occurs, with an indication of a decrease in the effectiveness of production machines. The highest reduction in machine effectiveness occurred in primary winding machines. The purpose of this research is to measure the value of the effectiveness of the primary rolling machine using the overall equipment effectiveness (OEE) method and six big losses. Furthermore, to analyze the factors that are the main priority as a basis for improvement proposals to increase production efficiency using a causal diagram. In the calculation, OEE measures effectiveness with 3 points of view, namely availability, performance, and quality. To determine the decrease in machine effectiveness, the six big losses method was used. The results showed that the average effectiveness level of the primary rolling machine during the study period was 80.7%, with an average value of 97.75% availability, 68.15% performance, and 99.65% quality. Meanwhile, the one that most affected the decrease in the effectiveness of the primary rolling machine was reduced speed losses.
LATTICE STRAIN ANALYSIS OF TITANIUM ROD PROCESSED BY EQUAL-CHANNEL ANGULAR PRESSING (ECAP) WITH Bc ROUTE USING X-RAY DIFFRACTION LINE BROADENING ANALYSIS Purawiardi, R. Ibrahim; Astawa, I Nyoman Gede Putrayasa
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 15 No. 1 (2021): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.15.1.26-35

Abstract

Equal-channel angular pressing (ECAP) was one of severe plastic deformation method in order to increase the mechanical properties of solid metal without changing its dimension and without adding any alloy elements. The change of mechanical properties on ECAPed metals was caused by the change of lattice strain, so that the lattice strain investigation was recommended for evaluating ECAPed metals. In this study, pure titanium rod was treated by ECAP with Bc route and two passes. Before ECAPed, this titanium rod consisted of two lattice strains i.e. 0.001014 and 0.005241. After ECAPed, a lattice strain of 0.005241 reduces to 0.003205 and 0.003555 after first pass and reduces again to 0.002576 and 0.002647 after two passes. Meanwhile, a lattice strain of 0.001014 was annihilated after ECAP treatment. These results show that ECAP treatment can reduce and eliminate lattice strains on titanium rod. This study also shows that the reduction of lattice strains implicates to the increasing of its hardness value.
THE EFFECT OF WATER TEMPERATURE AS QUENCHING MEDIA ON THE CHARACTERISTICS OF HV 350 WELD DEPOSITS Sopiyan, Sopiyan; Basori, Basori; Susetyo, Ferry Budhi
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol. 14 No. 2 (2020): SINTEK JURNAL
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.14.2.118-122

Abstract

Hardness is a mechanical property that is needed when doing the hardfacing process. Increased violence can be generated by conducting a quenching process. The temperature of the quenching media is one of the important factors to produce maximum hardness. In this study a two-layer welding process will be carried out using HV 350 electrodes on low carbon steel then the specimens are heated in a furnace and quenching is carried out into water with two variations in water temperature namely 15 and 30 °C. Variations in water temperature during quenching produce varying hardness and microstructure. The highest hardness is produced at 15 °C where in micro photographs there are a few phases of smaller size compared to other specimens.

Page 19 of 27 | Total Record : 269

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