cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Prihatin Oktivasari
Contact Email
jalaludin.rasyid@pnj.ac.id
Phone
+62818864451
Journal Mail Official
p3m@pnj.ac.id
Editorial Address
Jl. Prof. DR. G.A. Siwabessy, Kukusan, Kecamatan Beji, Kota Depok, Jawa Barat 16424
Location
Kota depok,
Jawa barat
INDONESIA
JURNAL POLI-TEKNOLOGI
Published by Politeknik Negeri Jakarta
ISSN : 14122782     EISSN : 24079103     DOI : https://doi.org/10.32722/pt.v20i1
Core Subject : Science, Engineering,
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation
Poli-Teknologi Journal is a journal, which began publication in 2002, published by the Research and community service Unit of Politeknik Negeri Jakarta. It starts from Volume 1 Number 1 in January 2022 for printed version; ISSN (print) 1412-2782 and ISSN (online) 2407-9103. Poli-Teknologi Journal is a series of scientific publications in applied science and technology area from the perspective of a multi and interdisciplinary studies and it is published 3 times in year.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 18 Documents
 1   2 
Search results for , issue "Vol. 18 No. 3 (2019)" : 18 Documents clear
MODIFIKASI BUCKET ELEVATOR 536 PADA PT X Candra Damis Widiawaty; Averoes Syahputra Agil; Bayu Chandra Hangesthi
Jurnal Poli-Teknologi Vol. 18 No. 3 (2019)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v18i3.2393

Abstract

In the production process at PT X, such as casting process, required raw material in the form of casting sand. The sand transport process is done by a machine called a Bucket Elevator. The current condition of Bucket Elevator at Plant 2 PT X had some problems on its design due to the initial modification process to the machine that were deliberately done in order to ease the process of troubleshooting and repair on the machine to adjust the height of the drum shaft supported by the bearing, however, the modification causes a sand leak that impacted the lifetime of the bearing. The damage that occurs to the bearing of the Bucket Elevator can slow the production process at PT X down, which lasts between 120 hours to 134 hours per week. Therefore, it is necessary to modify the design of the Bucket Elevator machine in order to stop the sand leakage and be able to work optimally. The design modifications made, are changes to the shaft height adjusting mechanism of the Bucket Elevator 536 drum machine by providing a lock to minimize the leakage of sand that occurs and replace the bearing type to the type that is equipped with a seal to prevent the entry of sand into the bearings. The result of this modification can extend the lifetime bearing, thereby reducing production costs due to bearing replacement, and easing the troubleshooting and repairing process of the engine to adjust the height of the drum shaft supported by the bearings.
ANALISA KEKUATAN WELDING REPAIR BAJA AISI 420 DENGAN METODA GMAW Cecep Slamet Abadi; Rosidi Rosidi; Idrus Assagaf
Jurnal Poli-Teknologi Vol. 18 No. 3 (2019)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v18i3.2396

Abstract

Welding technology is used because besides being easy to use, it can also reduce costs so it is cheaper. Especially for welding repair. From the welding repair the extent to which the strength of GMAW welds can repair components from the molded plastic mold room made of AISI 420 stainless steel. Repair of the print room components using deposit welding is tested using tensile strength and hardness as realization of resistance when holding the rate of liquid plastic entering the print room by 25 to 40 MPa, depending on the plastic viscosity, the precision of the mold and the filling level of the print room. Deposition welding method as a welding repair can affect a procedure to be able to produce a component that is safe and capable of being used in accordance with the provisions. The welding process used is reverse polarity GMAW DC with 125 A current and ER 70 S welding wire diameter 1.2 mm. Test material AISI 420. Tests carried out were tensile test, impact test and hardness test in weld metal, HAZ and base metal. From the Charpy impact test and tensile test obtained the value of welding strength which is close to the strength of the complete object, which is equal to 65%. The energy absorbed by the impact test object with GMAW welding is 5.4 Joule while for the whole test object is 8.1 Joule. The welding tensile strength is 520 MPa compared to the tensile tensile strength of 820 MPa.
RANCANG BANGUN APLIKASI MANAJEMEN GUDANG SUKU CADANG ALAT BERAT PNJ Abdul Azis Abdillah; Muhammad Toby Adigunanugraha; Ivana Bianca
Jurnal Poli-Teknologi Vol. 18 No. 3 (2019)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v18i3.2397

Abstract

Heavy Equipment Study Program, Jakarta State Polytechnic, has a warehouse that aims to store spare parts. These spare parts are used to meet the practical needs of students when lectures take place every semester. During this time, to lend and report spare parts, heavy equipment warehouse technicians still use forms and spare parts cards. This method is less effective when the stakeholders such as the Head of Workshop and Head of Study Program want to know the amount of spare parts stock that is still owned by the warehouse or data warehouse cannot be seen in real time. From these problems, the warehouse needs a way to speed up the process. One method that can be used to overcome this problem is to create a web-based system or application that can carry out an inventory, record, process, and report the spare parts data contained in the heavy equipment warehouse. This writing aims to design and build warehouse management applications for heavy equipment spare parts. So, with this web-based application, stake holders can view reports from the warehouse with the right target, accurate, and efficient.
PENGARUH LEBAR SUDUT MANGKOK TERHADAP UNJUK KERJA TURBIN KINETIK Ujiburrahman Ujiburrahman; Rudy Soenoko; Moch. Agus Choiron
Jurnal Poli-Teknologi Vol. 18 No. 3 (2019)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v18i3.2398

Abstract

Power and efficiency are parameters that show the performance of a kinetic turbine. Previous studies have shown various factors such as flowrate, dimensions and geometry of kinetic turbines are variables that affect the magnitude of power and efficiency. In an effort to improve the performance of kinetic turbines it takes a deep understanding of the factors that influence it. Therefore the purpose of this study was to determine the effect of width variations of bowl blades on kinetic turbine performance. The method used in this study was real experimental on a laboratory scale. Tests were carried out on vertical shaft kinetic turbines with blade width variations of 8 cm, 9 cm and 10 cm. Each turbine is tested on variations of water discharge 45 m3/h, 50 m3/h, 55 m3/h, 60 m3/h and 65 m3/h and in rotation of 80 rpm. The results showed that the width of the bowl affected the performance of the kinetic turbine where the width of the 10 cm bowl blade had a higher performance than the width of the bowl blade 8 cm and 9 cm. The highest performance of kinetic turbines in the variation of the width of the 10 cm bowl blade was obtained at discharge conditions of 65 m3/h. In these conditions the power produced by the kinetic turbine is 12.98 Watts and the efficiency is 35.72%.
STUDI NUMERIK RANCANGAN ALAT PENYEDOT MERKURI PADA MESIN PEMBUAT BOHLAM DITINJAU BERDASARKAN HEAT TRANSFER Joko Jumiyanto; Sutrisno Sutrisno; Prajitno Prajitno
Jurnal Poli-Teknologi Vol. 18 No. 3 (2019)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v18i3.2411

Abstract

The purpose of this study is to observe the pattern of fluid flow on a bulb making machine. The design problem of a mercury suction device is some of the mercury and the exhaust heat from the chimney is sucked in imperfectly towards the outlet. These imperfections occur due to the chimney design and power at the outlet fan. Variations in speed at the bulb-making machine outlet are the most effective looking simulation. CFD simulation is done using fluent ansys. The results of the simulation show the heat transfer phenomenon that occurred. At a speed of 6 m/s the maximum heat air produced is 30.5C. The speed variation in the most effective bulb making machine in this study is 15 m/s. because the surrounding air is almost close to initial temperature which is equal to 27.7C. Keep in mind that by increasing the speed value it will reduce the level of efficiency of the tool.
PENGARUH SPUTTERING TiN TERHADAP KEKASARAN, KEKERASAN PERMUKAAN MATERIAL AISI316L Jemssy Ronald Rohi; Priyo Tri Iswanto; Tjipto Sujitno; Erich Umbu Kondi
Jurnal Poli-Teknologi Vol. 18 No. 3 (2019)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v18i3.2412

Abstract

AISI 316L is widely used for implantation in orthopedic surgery due to its good corrosion resistance, mechanical properties and low cost. However, AISI 316L is not well suited for biocompatibility with the body, so implant material with AISI 316L can’t be used for a long time. One way to improve the corrosion resistance and mechanical properties of AISI 316L is to perform a surface treatment such as sputtering. This study discusses the effect of deposition sputtering TiN of 60, 90, 120 and 150 minutes on roughness and surface hardness at a ratio of argon gas and nitrogen to 80% Ar:20% N2. The results of the surface roughness value of the TiN sputtering layer deposited to AISI 316L for 60, 90, 120, and 150 minutes were 0.02 μm, 0.04 μm, 0.06 μm, and 0.04 μm respectively. This shows that the coating time of TiN in AISI 316L has no significant influence on value of surface roughness. Surface hardness results at 60, 90, 120, and 150 minutes were obtained with 268 HVN, 275 HVN, 278 HVN and 282 HVN. Increased hardness value, as the TiN thin layer has a higher hardness value compared to AISI 316L. The longer the deposition time, the more layers are formed and the layer becomes thicker. With the thickness of the layer, the density at the grain boundary increases. Because the higher density leads to grain growth, in which form micropores.
KAJIAN KUALITAS PEMBAKARAN TERHADAP PENGGUNAAN FILTER BBM PADA MESIN DIESEL Tatun Hayatun Nufus; Ariek Sulistyowati; Asep Yana; Fitri Wijayanti
Jurnal Poli-Teknologi Vol. 18 No. 3 (2019)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v18i3.2413

Abstract

The price of oil fuel continues to rise, decreased supplies oil at the other side, those two factors motivate researchers to conduct research related to the efficient use of fuel. Have been made three types of fuel oil which the principle of an electromagnet used a filter, all three made of the coil with a convolution wire as many as 5000 a convolution and diameter of the nucleus of a coil 44.5 mm, 28.5 mm and 17.5 mm, a filter tested in a diesel engine. Testing done in the rpm the ignition is started 1100 until 1700 rpm, by opening throttle % to 60 % from 30%. Testing first one was done by making constant round of 1500 rpm and openings throttle vary from 30 % to 60%, next testing done with the variation of rpm start 1100 rpm until 1700 rpm by making constant valve as 40 % and of 60 % . The purpose of the variations to obtain optimum result against consumption of material fuel ( sfc ) the most little uses. Testing was done in a laboratory material.
PERUBAHAN SISTEM KONTROL DARI PLC KE DCS PADA GRUP BAG FILTER 563-BF1 Jefri Gunawan; Fatahula Fatahula; Juhartono Juhartono
Jurnal Poli-Teknologi Vol. 18 No. 3 (2019)
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/pt.v18i3.2414

Abstract

Bag filter is an equipment in cement industries that used for handling dust from material or separate fines dust with air to make the area is not dusty and it is not make accumulation material. Bag filter (563-BF1) is used for handling dusty area at outlet ball mill in the cement making process. The working systems of bag filter group (563-BF1) is controlled by PLC (Programmable Logic Control). However, the PLC is obsolete so it takes a long time to handle when damage occurs and causes the risk of production loss reach Rp 1,301,801,760.00. In addition, communication systems between PLC with Central Control Room (CCR) that are less reliable cause communication to fail on April 2019 so that the equipment cannot be controlled. To overcome this, it is necessary to upgrade the PLC and communication system to the latest version or change it to DCS (Distributed Control System). Upgrading PLC requires huge costs with almost the same communication system reliability. While changing the control system to DCS is cheaper with better reliable system. So, we chose to change it to DCS. After that control system is changed to DCS on April 2019, the risk of production loss can be eliminated with saving cost in the amount of Rp 220,402,885.00 and after 3 month the communication failed is never occurs (it is more reliable).

Page 2 of 2 | Total Record : 18

 1   2 

Filter by Year

2019 2019


Reset
Filter By Issues
All Issue Vol. 23 No. 3 (2024) Vol. 23 No. 2 (2024) Vol. 23 No. 1 (2024) Vol. 22 No. 3 (2023) Vol. 22 No. 2 (2023) Vol. 22 No. 1 (2023) Vol. 21 No. 3 (2022) Vol. 21 No. 2 (2022) Vol. 21 No. 1 (2022) Vol. 20 No. 3 (2021) Vol. 20 No. 2 (2021) Vol. 20 No. 1 (2021) Vol. 19 No. 3 (2020) Vol. 19 No. 2 (2020) Vol. 19 No. 1 (2020) Vol. 18 No. 3 (2019) Vol. 18 No. 2 (2019) Vol. 18 No. 1 (2019) Vol. 17 No. 3 (2018) Vol. 17 No. 2 (2018) Vol. 17 No. 1 (2018) Vol. 16 No. 3 (2017) Vol. 16 No. 2 (2017) Vol. 15 No. 3 (2016) Vol. 15 No. 2 (2016) Vol. 15 No. 1 (2016) Vol. 14 No. 3 (2015) Vol. 14 No. 2 (2015) Vol. 14 No. 1 (2015) Vol. 13 No. 1 (2014) Vol. 12 No. 2 (2013) Vol. 12 No. 1 (2013) Vol. 11 No. 3 (2012) Vol. 11 No. 1 (2012) Vol. 10 No. 3 (2011) Vol. 10 No. 2 (2011) Vol. 10 No. 1 (2011) Vol. 9 No. 3 (2010) Vol. 9 No. 2 (2010) Vol. 9 No. 1 (2010) More Issue