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Analysis of Characteristics of S45C Steel Changes due to the Quenching and Tempering Process Golwa, Gian Villany; Romahadi, Dedik; Arwati, I Gusti Ayu
World Chemical Engineering Journal VOLUME 6 NO. 2 DECEMBER 2022
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/wcej.v6i2.17611

S45C steel has a carbon content of 0.50% and its classified as medium carbon steel. The main element content of S45C is carbon (C) is 0.50%, sulphur (S) is 0.035%, and manganese (Mn) is 0.80%. Tempering is a heat treatment process in which the hardening or normalizing process was previously carried out on steel. The research method was carried out where the steel was heated below the critical temperature and cooled. Quenching is a process of rapidly cooling the material from austenitizing from a temperature range of 815 °C to 870 °C for steel. S45C steel was quenched at 950 °C for 120 minutes, then tempered at 700 °C, and 500 °C for 120 minutes. The raw material sample (without heat treatment) is the initial reference standard among the samples undergoing the heat treatment process. They are then analyzed, and the influence and changes in the characteristics after that. In addition, changes in mechanical properties due to the heat treatment process experienced by S45C steel use tensile tests, Charpy impact tests, hardness tests and microstructures. The research results on the quenching process sample were tempered at a temperature of 500 °C and held for 120 minutes, increasing tensile strength by 17.1% and yield strength of 56.82%.

PENGELOLAAN BANK SAMPAH DAN TEKNOLOGI KOMPOSTER PADA LEMBAGA KESEJAHTERAAN SOSIAL ANAK AL-UMMI CIANJUR, JAWA BARAT Soelton, Mochamad; Putra Saratian, Eko Tama; Golwa, Gian Villany; Thoullon, Muhammad Shirhan; Migdad, Abian
Jurnal Pengabdian Teratai Vol 5 No 2 (2024): Jurnal Pengabdian Teratai
Publisher : Lembaga Penelitian Dan Pengabdian Pada Masyarakat (LPPM) Institut Bisnis dan Informatika (IBI) Kosgoro 1957

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55122/teratai.v5i2.1601

Yayasan Surya Al-Ummi merupakan Lembaga Kesejahteraan Sosial Anak (LKSA) di Kota Cianjur Jawa Barat, dengan jumlah anak asuhan berjumlah 103 orang, permasalahan sampah menjadi kondisi yang membutuhkan penanganan tepat. Sampah dapur organik maupun anorganik yang diperkirakan mencapai 1 ton kubik sampah per harinya. Sampah-sampah tersebut dapat bernilai ekonomis apabila dikelola dengan manajemen bank sampah dan didaur ulang menjadi barang seni kerajinan bernilai ekonomis, barang rongsok yang bermanfaat maupun diolah menjadi pupuk organik yang dapat menambah pendapatan. Pengabdian kepada masyarakat ini bertujuan, penyuluhan pengelolaan bank sampah, pemisahan sampah organik dan anorganik, penerapan pengolahan limbah sampah organik dengan menggunakan alat komposter untuk memproduksi pupuk organik. Dengan memberikan seperangkat mesin komposter yang dapat digunakan ketika penyuluhan dan pelatihan berlangsung serta dapat dimiliki sebagai hibah aset untuk dimanfaatkan sebagai menambah nilai ekonomis pengelolaan panti tersebut. Berdasarkan evaluasi kegiatan dengan diikuti sebanyak 70 peserta menyatakan puas terkait adanya kegiatan pengelolaan sampah organik menjadi pupuk cair. Tingkat pemahaman peserta terhadap topik mencapai 75%, yang menunjukkan bahwa sebagian besar peserta dapat memahami prinsip-prinsip dan praktik produksi pupuk. Kegiatan mampu memberikan edukasi efektif kepada jajaran pengurus dan anak-anak panti. Hasil produksi sampah organik saat ini sedang proses produksi dan diperkirakan akan menghasilkan 100 liter per minggu.

ANALISIS PENGARUH SUMBU RODA TERHADAP RADIUS BELOK PADA MOTOR LISTRIK E-NIAGA GENI BIRU 3 RODA Aditya, Roiy; Golwa, Gian Villany
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 12, No 3 (2023)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v12i3.16098

Motor listrik E-niaga geni biru merupakan kendaraan roda 3 yang menggunakan energi listrik, di setiap roda memiliki jarak sumbu yang dapat mempengaruhi terhadap kestabilan kendaraan pada saat posisi belok yang dapat menyebabkan slip pada roda sehingga mengalami perilaku understeer atau oversteer. Radius belok adalah jarak belok minimum yang dapat diperlukan oleh kendaraan. Untuk mengetahui radius belok pada motor listrik E-niaga geni biru peneliti melakukan analisis dengan menggunakan metode perbandingan pengukuran secara teoritis dan pemodelan pada software AutoCAD. Gaya vertikal, gaya sentrifugal dan gaya lateral merupakan gaya – gaya yang terjadi pada ban untuk mengetahui sudut slip. Hasil perhitungan teoritis dan pemodelan Software AutoCAD memiliki hasil yang sama didapatkan radius belok 2,93 m dengan radius maksimal 3,71 m dan radius minimal 2,11 m. Pada kecepatan 30 km/jam, 35 km/jam dan 40 km/jam sudut slip roda belakang lebih besar dari pada roda depan. Hal ini disebabkan karena roda belakang bernilai negatif atau berlawanan dengan gaya vertikal pada roda depan, sehingga terjadi pengurangan gaya vertikal pada roda belakang. index understeer (Kus) menunjukkan pada kecepatan 30 km/jam, 35 km/jam dan 40 km/jam mengalami perilaku belok oversteer karena mempunyai nilai negatif yaitu -3,36, -4,9 dan -5,37. Nilai negatif disebabkan karena sudut slip roda belakang lebih besar daripada roda depan.

Rancang Bangun Prototipe Turbin Archimedes Untuk Tangki Air Perumahan Dengan Formulasi Chris Rorres Prasetyo, Candra Bagus; Golwa, Gian Villany; Kusuma, Tony Indra; Jabar, Maulana Abdul
Jurnal Teknologi dan Inovasi Industri (JTII) Vol 3, No 1 (2022)
Publisher : Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtii.v3i1.41

Rancang bangun prototype Turbin Archimedes dilakukan untuk dapat memaksimalkan energi potensial dari tangki penampungan air untuk dijadikan sebagai pembangkit listrik skala piko hidro. Jumlah sudu dan kisar ulir pada turbin ulir dijadikan sebagai Parameter internal, sedangkan radius luar turbin, panjang turbin dan kemiringan poros turbin dijadikan sebagai Parameter eksternalnya. Kedua parameter tersebut merupakan bentuk geometri dari turbin ulir. Debit dan head biasanya digunakan untuk menentukan Parameter eksternal. Diharapkan penelitian dari Rancang Bangun Turbin Archimedes skala laboraturium ini dapat dijadikan sebagai study eksperimental untuk pembuatan pembangkit listrik piko hidro. Bentuk geometri dari turbin ulir tersebut dapat diperoleh dengan menggunakan formulasi dari Chris Rorres. Hasil rancang bangun prototipe turbin Archimedes memiliki spesifikasi: kontruksi rotor memiliki 1 buah sudu ulir, kisar ulir 29,28 mm, radius sudu luar (Ro) 101,6 mm dan radius sudu dalam (Ri) 54 mm. kisar ulir sebesar 29,28mm, jumlah kisar sebanyak 12,06 dan kemiringan turbin efektif yaitu sebesar 35˚ .

DESIGN ANALYSIS OF AXIAL FLUX PERMANENT MAGNET GENERATOR FOR EXHAUST AC VERSION-3 TYPE B OUTPUT WIND POWER PLANT PROTOTYPE Alam, Muhammad Ramadhan Noor; Golwa, Gian Villany
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 14, No 2 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v14i2.15993

Outside AC exhaust wind power plant is one of the micro-scale renewable energies developed in the last five years. One of the main components of a power plant is a generator. The generator is a device that converts mechanical energy into electrical energy. An axial flux permanent magnet generator is believed to be the most appropriate generator for a power plant with a low-speed wind power source, such as outside AC exhaust. A design analysis needs to be done to produce an axial flux permanent magnet generator capable of producing 12vdc electric voltage, which will be used to charge the battery. This research uses the theoretical calculation analysis method on three rotor designs with different sizes and obtained rotor design 1 with the most considerable maximum flux value of 0.000998352 Wb. The calculation of the generator output planning signifies that to obtain an output voltage of 12 Vdc at a frequency of 20 Hz, 166 turns of wire are needed. The output of 12.8 Vdc was successfully generated after the generators were connected in series parallel at a frequency of 27.5 Hz. The wind speed entering the power plant inlet was 5.8 m/s, with generator one at a speed of 682 rpm, generator two at 749 rpm, and generator three at 888 rpm, which will then be used to charge the 12 Vdc battery. After a load test using a 12 Vdc 6Watt lamp on the designed axial flux permanent magnet generator, it can be seen that the voltage drop begins to occur at a frequency of 22.5 Hz when the current flow begins to rise. During the no-load test, at a frequency of 22.5 Hz, the measured DC voltage was 9.2 Vdc. Meanwhile, when testing with a 12 Vdc 6Watt lamp load at a frequency of 22.5 Hz, the measured voltage is 5 Vdc. There is a voltage drop of 4.2 Vdc. Furthermore, there is a voltage drop of 2.8 Vdc, 3.8 Vdc, 4.6 Vdc, and 5.2 Vdc at 25 Hz, 27.5 Hz, 30 Hz, and 32.5 Hz. This prototype of an outside AC exhaust wind power plant is expected to be useful for daily needs in the community.

PENGELOLAAN BANK SAMPAH DAN TEKNOLOGI KOMPOSTER PADA LEMBAGA KESEJAHTERAAN SOSIAL ANAK AL-UMMI CIANJUR, JAWA BARAT Soelton, Mochamad; Putra Saratian, Eko Tama; Golwa, Gian Villany; Thoullon, Muhammad Shirhan; Migdad, Abian
Jurnal Pengabdian Teratai Vol. 5 No. 2 (2024): Jurnal Pengabdian Teratai
Publisher : Lembaga Penelitian Dan Pengabdian Pada Masyarakat (LPPM) Institut Bisnis dan Informatika (IBI) Kosgoro 1957

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55122/teratai.v5i2.1601

Yayasan Surya Al-Ummi merupakan Lembaga Kesejahteraan Sosial Anak (LKSA) di Kota Cianjur Jawa Barat, dengan jumlah anak asuhan berjumlah 103 orang, permasalahan sampah menjadi kondisi yang membutuhkan penanganan tepat. Sampah dapur organik maupun anorganik yang diperkirakan mencapai 1 ton kubik sampah per harinya. Sampah-sampah tersebut dapat bernilai ekonomis apabila dikelola dengan manajemen bank sampah dan didaur ulang menjadi barang seni kerajinan bernilai ekonomis, barang rongsok yang bermanfaat maupun diolah menjadi pupuk organik yang dapat menambah pendapatan. Pengabdian kepada masyarakat ini bertujuan, penyuluhan pengelolaan bank sampah, pemisahan sampah organik dan anorganik, penerapan pengolahan limbah sampah organik dengan menggunakan alat komposter untuk memproduksi pupuk organik. Dengan memberikan seperangkat mesin komposter yang dapat digunakan ketika penyuluhan dan pelatihan berlangsung serta dapat dimiliki sebagai hibah aset untuk dimanfaatkan sebagai menambah nilai ekonomis pengelolaan panti tersebut. Berdasarkan evaluasi kegiatan dengan diikuti sebanyak 70 peserta menyatakan puas terkait adanya kegiatan pengelolaan sampah organik menjadi pupuk cair. Tingkat pemahaman peserta terhadap topik mencapai 75%, yang menunjukkan bahwa sebagian besar peserta dapat memahami prinsip-prinsip dan praktik produksi pupuk. Kegiatan mampu memberikan edukasi efektif kepada jajaran pengurus dan anak-anak panti. Hasil produksi sampah organik saat ini sedang proses produksi dan diperkirakan akan menghasilkan 100 liter per minggu.

Enhancing Conveyor Belt Performance: Evaluating the Impact of In-creased Capacity Using Belt Analyst Software Golwa, Gian Villany; Murdiyati, Sari; Satria, Muhammad Kevin
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 6, No 1 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i1.19449

This study investigates the effects of increasing conveyor belt capacity from 148.5 tons per hour (t/h) to 180 t/h on the overall system performance, employing both manual measurements and simulations using Belt Analyst software. The research aims to evaluate critical parameters such as effective pulling force, motor power requirements, structural load, and belt deflection, which are essential for determining the feasibility and impact of such an upgrade. The analysis reveals that with the capacity increase, the effective pulling force required rises to 14,072 N, while the motor power usage escalates to 15 kW. Concurrently, the structural load experiences a significant increase from 46.144 kg/m to 56.238 kg/m, and belt deflection intensifies from 22 mm to 27 mm. These findings suggest that increasing the conveyor belt capacity to 180 t/h, may lead to increased stress on the structure and belt, which could potentially affect the lifespan and performance of the conveyor system. Furthermore, while the conveyor system's performance enhances at the higher capacity, it also places additional stress on the system's components. The study further examines the implications of these changes, emphasizing the potential risks to the conveyor belt’s structural integrity and the possible reduction in its lifespan due to the increased mechanical stress. It is highlighted that careful consideration and precise engineering adjustments are necessary when planning capacity enhancements to avoid adverse effects on the system's longevity and reliability.

ANALISIS KECEPATAN KELUARAN ANGIN KONDENSOR AC TERHADAP JENIS–JENIS BLADE GENERATOR LISTRIK DENGAN KOMPUTASI FLUIDA DINAMIK: Analysis of AC Condensor Wind Output Speed to Types of Electric Blade Generator with Computational Fluid Dynamics Wahid Wahyu Saputro; Golwa, Gian Villany
Jurnal Konversi Energi dan Manufaktur Vol. 9 No. 2 (2024)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.9.2.1

Electrical energy is widely used for household and industrial purposes, so the need for electrical energy will continue to increase every year. Therefore, it is necessary to develop an electrical energy generation system that comes from renewable energy such as wind. Currently, not much is known about the use of wasted wind from air conditioner (AC) condensers. The blow of wind can be used to produce electrical energy, so it is necessary to make wind-powered electric generator blades from the condenser output. The blade that will be designed is a three-blade model, so it is hoped that it can rotate the generator optimally. The purpose of this research is to design a three-blade type that can optimize the rotation of the electric motor/generator and get the maximum number of revolutions with a three-blade design because this design provides better stability and more efficiency. One way of making the design is to make simulation variations with computational fluid dynamics (CFD) in order to find out the right blade design to rotate the generator and find out the wind blowing from the air conditioner (AC) condenser that crosses the blade. In this study, three simulations were carried out to get maximum results, namely 390 rpm at 42 °C with a velocity of 10.7 m/s and a pressure of 34.4 Pa. To be able to determine the effectiveness of the AC condenser wind output speed with a three-blade design.

ANALISIS LAJU DEFORMASI PAHAT HSS PADA SIMULASI PEMBUBUTAN MESIN CNC DENGAN APLIKASI ANSYS : Analysis of HSS Tool Deformation Rate on CNC Machine Turning Simulation with ANSYS Application Widodo, Yakobus Rhio; Golwa, Gian Villany
Jurnal Konversi Energi dan Manufaktur Vol. 9 No. 1 (2024)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.9.1.7

The demand to improve quality and productivity in the manufacturing industry underlies the analysis of tool deformation rates in the turning process. The methods used previously are considered inaccurate, and the provided information is incomplete. Therefore, detailed and accurate simulations are needed to determine deformation and strain values in HSS chisels. This study aims to obtain deformation and strain values on high speed steel (HSS) chisels in the process of turning ST42 steel workpieces using the finite element methods (FEM) method. The analysis was carried out using the ANSYS explicit dynamics application. This application aims to simulate complex physical phenomena by entering predetermined parameters, including diameter, spindle rotation, and workpiece and tool properties. HSS chisels are used in this simulation with ST42 steel workpieces. The variables in this study were the workpiece diameters of 30 mm, 40 mm, and 50 mm, with the same length of 200 mm. From the simulation results, it is evident that the maximum deformation value of the HSS tool on a diameter of 30 mm workpiece is 205.04 µm at a time step of 1.0 x 10-4 seconds. On a diameter of 40 mm workpiece, it is 205.19 µm at the same time step, and for a workpiece with a diameter of 50 mm, the tool deformation is 205.23 µm at the same time step. Additionally, the strain value on the HSS chisel with a workpiece diameter of 30 mm is 0.689 µm at a time step of 1.0 x 10-4 seconds. For a workpiece with a diameter of 40 mm, the strain is 0.783 µm at a time step of 1.0011 x 10-4 seconds, and on a workpiece with a diameter of 50 mm, the final strain on the tool is 0.866 µm at a time step of 1.0 x10-4 seconds.

ANALISIS LAJU DEFORMASI PAHAT CARBIDE PADA SIMULASI PEMBUBUTAN BAJA ST41 DENGAN MESIN BUBUT KONVENSIONAL MENGGUNAKAN SOFTWARE ANSYS: Analysis of Carbide Tool Deformation Rate in Simulation of ST41 Steel Turning with Conventional Lathe using ANSYS Software Ulin Nuha; Golwa, Gian Villany
Jurnal Konversi Energi dan Manufaktur Vol. 9 No. 1 (2024)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.9.1.8

In the machining process, knowledge of the tool and workpiece is required to achieve maximum results between quality and productivity. Tool wear parameters are very important to know because the process of changing or sharpening the tool can be predicted. One thing that influences the tool wear rate is the friction force between the tool and the workpiece. This frictional force will produce vibrations and heat energy, causing the chisel grains to erode so that they will experience wear within certain standards. This research aims to analyze the wear value of carbide-type tool edges in the ST41 material turning process based on the friction force that occurs between the tool and the workpiece. Then, from the wear value, the recommended cutting speed is. The method used is simulation-based research using ANSYS software, especially ANSYS Mechanical, by entering predetermined parameters, including diameter and spindle rotation. From the simulation results, the total deformation of workpieces with diameters of 25 mm, 35 mm and 45 mm is 0.363 μm, 0.155 μm and 0.152 μm, respectively. It can be concluded from the simulation results that the largest total deformation is at a diameter of 25 mm.

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