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All Journal SPEKTRUM INDUSTRI Jurnal Teknologi Jurnal Optimasi Sistem Industri Journal of Applied Sciences and Advanced Technology Jurnal Teknik Mesin Mechanical Xplore Jurnal Akademika Kimia Borobudur Engineering Review Joong-Ki Jurnal Polimesin Jurnal Akademika Kimia Joong-Ki
Khoirudin Khoirudin
Universitas Buana Perjuangan Karawang
Religion Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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ANALISIS KINERJA EVAPORATOR PADA VAPORS COMPRESSION REFRIGERATION SYSTEM MENGGUNAKAN REFRIGERANT R410A Sukarman Sukarman; Khoirudin Khoirudin; Murtalim Murtalim; Ahmad Fauzi; Ricko Valderama; Amri Abdulah; Anwar Ilmar Ramadhan
Jurnal Teknologi Vol 14, No 1 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.1.127-138

Abstract

VCR system  is an energy conversion device that uses a mechanical vapour compression cycle in the process. The performance of the VCR system using environmentally friendly refrigerants is a significant issue, and much research is still underway to evaluate and improve the efficiency of the systems used. Therefore, this paper presents an experimental investigation of the performance of the refrigeration cycle. A VCR system was used as a test tool. The coefficient of performance (CoP) was studied using a VCR system  design with varying evaporator loads. Variation of an evaporator load is done by intervening fan rpm at five rpm levels. The VCR system uses a compressor with a capacity of 365 watts using R410A refrigerant. Refrigerant R410A is one of the alternative refrigerants to replace R22 which is not environmentally friendly. Experimental data was validated using Genetron Properties 1.1 software. Experimental analysis data showed that the highest CoP was obtained at the lowest rpm with a value of 3.17. Meanwhile, the lowest CoP is 3.02, obtained at the highest rpm. Loading the evaporator with fan rpm produces a CoP value indirectly proportional to the fan rpm value. Genetron 1.1 software validation results produce a higher CoP value of about 2%-3% than experimental data.
ANALISIS PENGARUH RADIUS DIES TERHADAP SPRINGBACK LOGAM LEMBARAN STAINLESS-STEEL PADA PROSES BENDING HIDROLIK V-DIE Sukarman Sukarman; Choirul Anwar; Nana Rahdiana; Khoirudin Khoirudin; Anwar Ilmar Ramadhan
Jurnal Teknologi Vol 12, No 2 (2020): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.12.2.123-132

Abstract

Proses bending merupakan salah satu proses pembentukan material (metal forming) banyak digunakan di proses manufaktur. Penggunaan radius dies bending dan penyetingan sudut bending yang tidak tepat akan berdampak  pada terjadinya kegagalan material dan dimensi.  Penelitian ini menggunakan ekperimental dengan menggunakan material Stainless-Steel (SUS 304) dengan tebal 1.0 mm yang memenuhi standar ASTM A-240. Penelitian ini dilakukan dengan menggunakan parameter sudut bending 90o, yang divariasikan pada radius dies sebesar 1.0 mm dan 1.3 mm. Analisis pengaruh springback telah dilakukan dengan mengatur sudut bending secara hitungan teoritis dan membandingkanya dengan pengaturan sudut aktual. Proses selanjutnya dilakukan analisis dan evaluasi untuk mencapai sudut standar   . Proses bending yang menggunakan sudut bending 93o45” dan 92o30” berturut-turut menghasilkan nilai springback sebesar 0.98 dan 0.97. Sudut benda kerja yang dihasilkan  pada saat  penyetingan sudut  bending 92o30” dan 93o45” berturut-turut adalah 91o30” dan 90O.  Dari data ini didapatkan bahwa proses bending menggukan sudut 92o,30” mendapatkan hasil yang lebih presisi dibandingkan dengan sudut bending teoritis 93o45”.
ANALISIS FENOMENA SPRING-BACK/SPRING-GO FACTOR PADA LEMBARAN BAJA KARBON RENDAH MENGGUNAKAN PENDEKATAN EKSPERIMENTAL Khoirudin Khoirudin; Sukarman Sukarman; Nana Rahdiana; Ahmad Fauzi
Jurnal Teknologi Vol 14, No 1 (2022): Jurnal Teknologi
Publisher : Fakultas Teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jurtek.14.1.27-38

Abstract

Bending angle accuracy is the primary output variable that should achieve in the V-bending   process. The spring-back/spring-go factor is one of the essential variables that affect the accuracy of the bending angle. This study uses the Taguchi experimental method using four input parameters and multiple practical levels. The input parameters used in this research are V-die  opening, punch angle (punch angel), punch speed (punch speed) and bending force. The V-die  opening used two experimental levels at the practical level, while the other three parameters used three functional groups. This work selected SPCC-SD low carbon steel material with a material thickness of 0.8 mm in this study. The results of the ANOVA analysis showed that the punch angle is the main factor that affects the spring-back/spring-go factor, with the highest contribution of 76.15%. This condition is also following the results of the S/N ratio analysis, where the punch angle parameter has a delta of 0.125, followed by the punch speed, V-die  opening, and bending force. These parameters have a delta value of 0.026, 0.022, and 0.009, respectively.
Analysis of Pressure Vessel Design on Radiator Cooling System Using Low Carbon Steel Material Nana Rahdiana; Sukarman Sukarman; Murtalim Murtalim; Khoirudin Khoirudin; Dodi Mulyadi; Amir Amir; Tito Chaerul Pratama; Ahmad Hidayat
Journal of Applied Sciences and Advanced Technology Vol 3, No 3 (2021): Journal of Applied Sciences and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jasat.3.3.81-90

Abstract

This study discusses the analysis of a pressure vessel's design in the Radiator Cooling 1000 (RC-1000) system, which operates at a design temperature of 100oC. A pressure vessel is a container of gaseous, solid, or liquid material subjected to internal or external pressure and can withstand various other load variations. The pressure vessel on the RC-1000 system has a diameter of 85.4 mm or 3.36 inches and will experience an internal pressure of about 143.7 kPa or 20.84 psi, so it must be designed safely. This research method uses analytical and experimental methods. The analytical method is used to calculate the thickness of the pressure vessel material, the maximum allowable working pressure, and the hydrostatic test calculation. While the experimental method was carried out on the hydrostatic test process, the evaluation was based on the prevailing regulations in the Republic of Indonesia. Using the SPCC-SD material (JIS 3141), it was found that the minimum thickness of this pressure vessel is 1.15 mm or 0.0452 inches on the shell side and 1.10 mm or 0.0434 inches on the head/dome side. The thickness of the material used on the shell side and head/dome is 1.2 mm or 0.0472 inches in practice. This pressure vessel has passed the hydrostatic test at 1600 kPa or 232.1 psi. The test pressure is given around seven psi higher because it makes it easier to read the scale on the pressure gauge.
Analysis Redox Reaction on Zinc-Coating Thickness Test in Metal Processing Industry of Small and Medium Enterprises Gatot Triyanto; Ricky R. Saputro; Chepi Reynaldir; Khoirudin Khoirudin; Sukarman Sukarman
Jurnal Akademika Kimia Vol. 11 No. 1 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.54 KB) | DOI: 10.22487/j24775185.2022.v11.i1.pp19-25

Abstract

This study discusses the implementation of redox reactions on the thickness test of the galvanized (zinc-coated) layer using the JIS-H-0401 standard to help Small and Medium Enterprises (SMEs) industries. Some of the finished products go through the galvanizing process in the metal processing industry. Quality constraints, especially related to the thickness of the galvanic (zinc-coated) layer, have become an object that is less controlled because of the limitations of the test equipment used. This research uses an experimental method applied to one of its products: a flat washer with SPCC material and a thickness of about 2.20 mm. SPCC - SD material is classified as low carbon steel based on its carbon content. 5-unit flat washers were identified with sample codes A, B, C, D, and E. Flat washers have an internal diameter of 22.65 - 22.7 mm. In comparison, the outer diameter is between 43.75 - 43.80. The redox reaction process uses HCl (hydrochloric acid) with a concentration of 1 M, which is diluted with water (H2O). The zinc thickness test results show that the flat washer has an average thickness of 10.52 microns with a minimum and maximum thickness variation of 10.66 -10.72 microns.
Evaluasi Kekuatan Resistance Spot Welding pada Proses Tailor welded blankss Menggunakan Mill-steel Beda Ketebalan Khoirudin khoirudin; Dicky Dimyati; Apang Djafar Ashiedieque; Sukarman S; Fathan Mubina Dewadi; Nana Rahdiana; Istianto Budhi Rahardja; Anwar Ilmar Ramadhan; Heri Suripto
Borobudur Engineering Review Vol 1 No 2 (2021): Mechanical and Industrial Engineering Research
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/benr.4916

Abstract

This paper presented the test of cup drawing, and the tensile ability of tailor welded blanks (TWBs) used to join the resistance spot welding a variety of different parameters. This study used SPCC-SD (JIS 3141) material with a material thickness of 1.0 mm and 1.2 mm. This research is focused on obtaining the highest tensile-shear strength of resistance spot welding and how it affects the results of the drawing cup process. This study used an experimental research method using six samples of RSW parameters. RSW parameters used are welding current, welding time, and squeeze time. This research was achieved the highest tensile-shear strength value of 5.09 kN and the lowest 4.15 kN which was achieved in the 5th and 1st samples respectively. The results of the cup drawing test using RSW parameters in the 5th and 6th samples showed no TWB failure in the welded area. Further research will be carried out by performing Taguchi optimization using RSW and TWBs parameters in the cup drawing process.
An Analysis of Spring-back and Spring-go on Variation of V-Dies Bending Angle Using Galvanized SGCC Steel Sheet Khoirudin Khoirudin; Sukarman Sukarman; Siswanto Siswanto; Nana Rahdiana; Ade Suhara
Jurnal Teknik Mesin Mechanical Xplore Vol 3 No 1 (2022): Jurnal Teknik Mesin Mechanical Xplore (JTMMX)
Publisher : Mechanical Engineering Department Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/jtmmx.v3i1.2753

Abstract

This study discusses the phenomenon of spring-back and spring-go in the bending kinematic shaping process using V-bending dies and SGCC galvanized steel sheet (JIS G 3302) material. During the bending process, the zinc layer on the surface of the galvanized steel must not be damaged. The zinc coating on galvanized sheet steel will affect the material forming process (metal forming process). This study employed an experimental design with four input variables: die opening L (mm), punch angle (punch engel), punch speed (punch speed), and bending force (force bending). The input factors for the experiment are 35 mm opening, 40o punch angle, 30 mm/minute punch speed, and 7500 N bending force. In the die opening setting conditions, the maximum spring-back angle is 35 mm, the punch angle is 40 °, the punch speed is 30 mm/minute, and the bending force is 6500 N. The average minimum and maximum spring-back angles in this condition are 0.71o and 4.08o, respectively. The bending force is 7000 N, the punch angle is 50 °, the punch speed is 40 mm/minute, and the minimum spring-go angle is 30o. In die opening parameters, the maximum spring-go angle achieved is 35o, the punch angle is 60o, the punch speed is 50 mm/minute, and the bending force is 700 N. The average minimum and maximum spring-go angles are 1.90o and 6.23o, respectively.
Enhancement Material Removal Rate Optimization of Sinker EDM Process Parameters Using a Rectangular Graphite Electrode Sumanto Sumanto; Acim Maulana; Dodi Mulyadi; Khoirudin Khoirudin; Siswanto Siswanto; Sukarman Sukarman; Ade Suhara; Safril Safril
Jurnal Optimasi Sistem Industri Vol. 21 No. 2 (2022): Published in November 2022
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v21.n2.p87-96.2022

Abstract

This article discusses the optimization of sinker electrical discharge machining (sinker EDM) processes using SPHC material that has been hardened. The sinker EDM method is widely employed, for example, in the production of moulds, dies, and automotive and aeronautical components. There is neither contact nor a cutting force between the electrode and the   work material in sinker EDM. The disadvantage of the sinker EDM is its low material removal rate. This work aims to optimize the material removal rate (MRR) using graphene electrodes in a rectangular configuration. The SPHC material was selected to determine the optimum MRR model of the sinker EDM input parameter. The Taguchi experimental design was chosen. The Taguchi technique used three input parameters and three experimental levels. Pulse current (I), spark on time (Ton), and gap voltage were among the input parameters (Vg). The graphite rectangle was chosen as an electrode material. The input parameter effect was evaluated by S/N ratio analysis. The result showed that pulse current has the most significant impact on material removal rate in the initial study, followed by spark on time and gap voltage. All input parameters are directly proportional to the MRR. For optimal material removal rate, the third level of pulse current, spark on time, and gap voltage must be maintained. In addition, the proposed Taguchi optimization model could be applied to an existing workshop floor as a simple and practical electronic tool for predicting wear and future research.
ANALISIS PENGARUH BENTUK STIFFENER TERHADAP KEKUATAN MAIN-TANK PADA TRANSFORMATOR TENAGA Khoirudin Khoirudin
Jurnal Teknik Mesin Mechanical Xplore Vol 1 No 1 (2020): Jurnal Teknik Mesin Mechanical Xplore
Publisher : Mechanical Engineering Department Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (921.933 KB) | DOI: 10.36805/jtmmx.v1i1.1281

Abstract

Transformator adalah perangkat statis yang digunakan untuk mentransfer energi listrik dari satu rangkaian ke rangkaian lain melalui induksi elektromagnetik tanpa perubahan frekuensi. Salah satu komponen utama transformator tenaga adalah tangki transformator. Struktur tangki transformator harus bisa menahan beban tekanan, vacuum, lifting, jacking, dan transportasi. Untuk mengurangi beban tekanan dan lendutan maka tangki transformator dipasang stiffener pada semua sisi. Penelitian ini dilakukan untuk mengetahui kekuatan tangki transformator dengan pendekatan numerik. Tangki transformator dipasang stiffener dengan tiga variasi yaitu tipe flat, tipe T dan tipe box dengan variasi tekanan yaitu sebesar 133 Pa dan 98 kPa. Penelitian ini bertujuan untuk mengetahui tegangan, regangan, dan deformasi pada masing-masing desain tangki transformator tenaga 150/20 kV 60 MVA. Hasil penelitian menunjukan bahwa desain tangki transformator dengan stiffener tipe T mempunyai tegangan (stress) dan regangan (strain) paling rendah dibanding desain yang lain. Pada tekanan 133 Pa tegangan (stress) yang terjadi pada tangki transformator dengan stiffener tipe T sebesar 0,255 MPa dan regangan (strain) sebesar 0,0000009, sedangkan pada tekanan 98 kPa tegangan (stress) yang terjadi sebesar 188 MPa dan regangan (strain) sebesar 0,000664. Desain tangki transformator dengan stiffener tipe box mempunyai deformasi (displacement) paling rendah dibanding dengan desain yang lain. Pada tekanan 133 Pa deformasi yang terjadi pada tangki transformator dengan stiffener tipe box sebesar 0,0049 mm, sedangkan pada tekanan 98 kPa sebesar 3,63 mm. Kata kunci: transformator tenaga, tangki transformator, tegangan, regangan, deformasi. Transformer is a static device used to transfer electrical energy from one circuit to another through electromagnetic induction without changes in frequency. One of the main components of a power transformer is a transformer tank. The transformer tank structure must be able to withstand pressure, vacuum, lifting, jacking and transportation loads. To reduce the pressure and deflection load, transformer tanks are installed with stiffener on all sides. This research was conducted to determine the strength of the transformer tank with a numerical approach. Transformer tank mounted stiffener with three variations of type namely flat type, T-type and box type with pressure variations that are 133 Pa and 98 kPa. This study aims to determine the stress, strain, and deformation in each 150/20 kV 60 MVA power transformer tank design. The results showed that the design of the transformer tank with T-type stiffener has the lowest stress and strain compared to other designs. At a pressure of 133 Pa the stress that occurs in a transformer tank with a T-type stiffener is 0.255 MPa and strain is 0.0000009, while at pressure 98 kPa the stress occurs at 188 MPa and strain is 0.000664. Transformer tank design with box type stiffener has the lowest deformation compared to other designs. At a pressure of 133 Pa, the deformation that occurs in a transformer tank with a box-type stiffener is 0.0049 mm, while at a pressure of 98 kPa is 3.63 mm. Keywords: power transformer, transformer tank, stress, strain, deformation.
Optimization of S-EDM Process Parameters on Material Removal Rate using Copper Electrodes Khoirudin Khoirudin; Sukarman Sukarman; Nana Rahdiana; Ade Suhara; Ahmad Fauzi
Jurnal POLIMESIN Vol 21, No 1 (2023): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i1.3199

Abstract

This article demonstrates that the sinker electrical discharge machining (S-EDM) method can be enhanced using SPHC (JIS G 3131) materials with a hardened surface. During S-EDM, neither contact nor a cutting force exists between the electrode and the workpiece. S-EDM is advantageous because it eliminates mechanical stress, chatter, and vibration issues with traditional milling. S-EDM is widely employed, for example, in the manufacturing of molds for automotive and aviation components. Taguchi design and signal-to-noise ratio (S/N ratio) were selected to examine the impact of the input parameter model on the material removal rate (MRR). The Taguchi approach assessed three input parameters and three experimental levels. The parameters pulse current (I), spark time (Ton), and gap voltage (Vg) were chosen to evaluate the MRR performance of the S-EDM process with the SPHC-hardened workpiece material. Copper with a diameter of 10 mm is chosen as the electrode material. This study aims to determine the optimal MRR for the chosen input variables. Results indicate that a more effective pulse current value promotes debris removal from the machining zone and stabilizes following spark release, speeding the material removal rate (MRR). In the S-EDM machining process, the pulse current value significantly affects the MRR and is one of the most significant response variables
Co-Authors Acim Maulana Ade Suhara Agus Suprihanto Ahmad Fauzi Ahmad Hidayat Amar Amar Amir Amir Amri Abdulah Anwar Ilmar Ramadhan Arul Basit Chepi Reynaldir Choirul Anwar Dicky Dimyati Dodi Mulyadi Fathan Mubina Dewadi Gatot Triyanto Istianto Budhi Rahardja Karyadi Murtalim Nana Rahdiana Nana Rahdiana Ricko Valderama Ricky R. Saputro Ridhwan Shalahuddin Saputra Rizki Aulia Nanda Safril Sani Suhardiman Shieddieque, Apang Djafar Shieddique, Apang Djafar Siswanto Siswanto Sukarman Sukarman Sukarman Sukarman Sumanto Sumanto Suripto, Heri Syahrul Taufik Hidayat Tegar Dwi Cahyo Tito Chaerul Pratama Trisa Ramadan