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All Journal Rotasi Jurnal Ilmiah Poli Rekayasa Jurnal Pendidikan Teknik Mesin Jurnal Teknologi Terapan Jurnal Teknik Mesin dan Mekatronika (Journal of Mechanical Engineering and Mechatronics) Jurnal Teknik Mesin Infotekmesin Jurnal Teknologi dan Riset Terapan (JATRA) Abdimasku : Jurnal Pengabdian Masyarakat DEDIKASI PKM DEVICE Jurnal Buana Farma JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI Journal of Applied Mechanical Engineering and Renewable Energy (JAMERE) Jurnal Pengabdian kepada Masyarakat (Nadimas) Journal of Applied Mechanical Technology (JAMET) BULLET : Jurnal Multidisiplin Ilmu Indonesian Journal of Community Empowerment Metalik: Jurnal Manufaktur, Energi, Material Teknik
Leo Van Gunawan
Politeknik Negeri Indramayu
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation

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Perbandingan Variasi Power Dalam Proses Laser Engraving Terhadap Hasil Produk Stainless Steel Purba, Adi Syahputra; Hermawan, Muhammad Ghandy Razzaki; Manurung, Meilani Mandhalena; Stefani, Windy; Dzulfiqar, Mohamad Alif; Gunawan, Leo Van
Journal of Applied Mechanical Technology Vol 2 No 1 (2023): Journal of Applied Mechanical Technology (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (808.105 KB) | DOI: 10.31884/jamet.v2i1.29

Abstract

Marking machining processes using lasers have developed in the industrial world. Having high precision and good final quality is one of the advantages of this laser machine. There is a thermal effect generated in the process, so we must understand the impact of the power applied to the material. Carry out the laser marking process with the engraving method on a stainless steel plate material which is given a variation of strength to observe the difference in the final result of a marking. Make as many as 3 pcs of products for each variation of power parameters. The product that has been produced will also be observed for surface roughness on the marking, which aims to find out how deep the food is from the marking. Observation of the surface roughness of the marking on the product using the Surface Roughness Tester 3 times for each product. The results of the data that have been taken will only be observed and entered into the marking results into the roughness class according to ISO or DIN 4763:1981. The marking process uses power variations of 20%, 40%, 60%, 80% and 100%. The results of the marking with the lowest power of 20% produce markings with a roughness value of 0.029µm – 0.110µm and enter into class N3 while the results of marking with the greatest power of 100% obtain a roughness value of 18.210µm – 19.876µm which is included in the roughness class N10. Based on the data obtained in the engraving process with different power variations, it can be interpreted that the higher the power supplied, the higher the roughness value
Analisis Pengaruh Suhu Preheating 125˚C, 150˚C Dan 200˚C Hasil Pengecoran Logam Terhadap Terjadinya Hot Tearing Menggunakan Material Alumunium 6061 Muhammad Luthfi; Haris, Emin; Van Gunawan, Leo; Luthfi, Muhammad; Rakhman, Abdul
Journal of Applied Mechanical Engineering and Renewable Energy Vol 4 No 1 (2024)
Publisher : Indonesian Society of Applied Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52158/jamere.v4i1.783

Abstract

The aluminum casting industry has experienced a lot of innovation and creativity to maintain its existence. Metal casting is a process by which hot molten metal is poured into a mold containing hollow pieces or cavities of the desired finished shape. The process of casting with a permanent mold is preheating the casting mold before the casting process is carried out. This is done so that the temperature of the casting mold increases, so that the difference between the temperature of the mold and the temperature of the aluminum to be poured is not too great. This study aims to overcome or prevent hot tearing by increasing the preheating temperature in the mold. The test results show that the preheating temperature of 200ºC does not experience shrinkage in the metal casting results. Whereas at preheating temperatures of 125ºC and 150ºC there are hot tearing defects and there is shrinkage. whereas at the preheating temperature variation of 200ºC there are only shrinkage defects. The results of the vickers hardness test showed that the higher the preheating temperature, the hardness value of the casting product will increase. The highest vickers hardness value was obtained at the 200°C preheating temperature variation of 69.55 HV, while at the 150°C preheating temperature variation, the vickers hardness value was 68.51 HV. and at a variation of the preheating temperature of 125ºC, the vickers hardness value is 67.04 HV. The results obtained from metallographic testing are aluminum 6061. Judging from the microstructure at the 200℃ preheating variation, the dentite grains look smaller than the 125℃ preheating variation and the 150℃ preheating variation. It can be concluded that the higher the preheating temperature, the better the denrite density.
PENERAPAN MESIN TUSUK SATE UNTUK MENINGKATKAN UMKM TUSUK SATE DI DESA KRASAK Sukroni; Gunawan, Leo Van; Ghozali, Muhammad
MAJU : Indonesian Journal of Community Empowerment Vol. 1 No. 5 (2024): MAJU : Indonesian Journal of Community Empowerment, September 2024
Publisher : Lembaga Pendidikan dan Penelitian Manggala Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62335/xxcqhw97

Abstract

The aim of this activity is to increase skewer production at skewer MSMEs in Krasak village. The transition from the process of making skewers manually to using a skewer machine. Provide education on the use of skewer machines. Testing the performance of the satay skewer machine found 286 skewers in 1 minute compared to the manual process which produced 25 skewers in 1 minute. From these results it can be concluded that the use of skewer machines is very effective and can increase skewer production in skewer SMEs in Krasak village.
Analisis Pengaruh Variasi Suhu Tempering Pada Sifat Mekanik Baja ASTM A36 Setelah Pengelasan SMAW Menggunakan Elektroda E 7016 Leo Van Gunawan; Puger Satya Andika; Tito Endramawan; Emin Haris; Casiman Sukardi; Unggul Satria Jati
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2144

Abstract

ASTM A36 is a type of structural metal that can be applied for various purposes such as making gears, bridge structures and ship buildings. After welding, ASTM A36 steel will produce residual stress. Residual stress in the welded metal is caused not balanced temperature distribution. The method for eliminating residual stress is tempering. Tempering is used to reduce residual stresses, increase the ductility and toughness of metals. This research aims to analyze the effect of variations in tempering temperature on the mechanical properties of ASTM A36 steel after SMAW welding using E7016 electrodes. The tensile strength test on the specimen showed the highest increase due to the tempering effect of 537,880 MPa at a temperature of 200°C. This is proven by the reduction in material hardness of 165.07 VHN at a tempering temperature of 200°C when compared to the hardness of the raw material. The growth of ferrite grains in the material structure shows that the ASTM A36 material is increasingly ductile after tempering. The results of research on the effect of variations in tempering temperature on the mechanical properties of ASTM A36 can be used as an alternative way to increase ductility after the welding process
Inspeksi Sambungan Rangka Mobil Listrik Tipe Tubular Space Frame Menggunakan Las GMAW dengan Cairan Liquid Penetrant Unggul Satria Jati; Dian Prabowo; Hety Dwi Hastuti; Leo Van Gunawan
Infotekmesin Vol 15 No 1 (2024): Infotekmesin: Januari, 2024
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v15i1.2163

Abstract

Technological developments increasingly require humans to increase their competence and innovation. The process of making frames for electric cars is one of the innovations to produce a strong frame. The frame is the main and important part of a vehicle, because the components and passengers will support the frame. The connection between frame components uses GMAW welding, which is the process of joining metal materials by heating them until they reach their melting point. To obtain a frame that meets the criteria, it is necessary to carry out a testing process, this testing process is NDT testing (Non Destructive Test), namely testing the physical part of the material in a way that does not damage the test object. Meanwhile, the aim of this research is to inspect the electric car frame so as to find discontinuities in the GMAW welding results. The results of this research were that there were 22 samples that underwent the liquid penetrant test process, of the total samples according to ASME Section VIII Division 1 Mandatory Appendix 6 there were 14 specimens that were acceptable while 8 needed improvement in the connection process. After the repair or repair process has been carried out, the frame is declared fit for use.
EFEKTIVITAS BIOETANOL DARI LIMBAH BIJI MANGGA SEBAGAI HAND SANITIZER TERHADAP BAKTERI Staphylococcus aureus Gunawan, Leo Van; Ghozali, Muhamad; Supriatun, Evi; Simanjuntak, Naomi Margaretha; Zainuddin, Zainuddin
Jurnal Buana Farma Vol. 4 No. 4 (2024): Jurnal Buana Farma : Jurnal Ilmiah Farmasi
Publisher : Fakultas Farmasi Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/jbf.v4i4.1225

Abstract

Indramayu is a mango producing area in West Java Province. There are many varieties of mango types cultivated in Indramayu, including gedong gincu, gajah, harum manis, cengkir, golek, lali jiwa, agrimania and manalagi. In Indramayu, mangoes are sold as fruit and dodol. Mango seeds are simply thrown away or used as seeds. Mango seeds contain 81.3% starch per 100 grams. The starch in mango seeds can be made into flour as a raw material for making bioethanol. Bioethanol with a content of 70% can be used as an antiseptic to kill bacteria, viruses and fungi so that it can be used as a basic ingredient for making hand sanitizer. The method for making hand sanitizer from mango seed bioethanol goes through the Liquification Process, Saccharification Process, Fermentation Process, Distillation Process, Testing Bioethanol Content, Making Hand Sanitizer and Testing the Effectiveness of Hand Sanitizer on Staphylococcus aureus Bacteria using the disk diffusion method. The results of testing the bioethanol content after the multistage distillation process is 74%. Then bioethanol is mixed with Glycerin 99,7%, H2O2 3% and Sterile Aquadest to make hand sanitizer. The results of testing the effectiveness of hand sanitizers on Staphylococcus aureus bacteria showed that the diameter of the inhibition zone was 6 mm. Based on the Davis and Stout criteria, the effectiveness of hand sanitizer from mango seed waste bioethanol in inhibiting the growth of Staphylococcus aureus bacteria is medium.
PENGUJIAN BUCKET ELEVATOR GEN.01 TM Sukroni, Sukroni; Suwandi, Dedi; Ghozali, Muhamad; Gunawan, Leo Van
Jurnal Ilmiah Poli Rekayasa Vol 18, No 2 (2023): April
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.18.2.296

Abstract

Post-harvest agricultural products are all activities carried out from the process of handling agricultural products to the process that produces semi-finished products. Improper post-harvest handling will result in yield loss, both weight and product quality. Readiness of mature harvest and post-harvest technology will improve the quality of rice and the understanding of farmers and technology users in efforts to reduce crop losses. Bucket elevator is a tool for moving material that can be used to lift grain during the grain milling process, which can help work to move grain from the surface into the milling machine. In the Bucket Elevator test results, the effective rotational speed is 352.5 Rpm using a 1 hp 3 phase motor. The design of model 1 is the optimal bucket for lifting grain, resulting in a net weight of 243 gr/bucket contents with a maximum capacity of 280 gr/bucket. When attached to the Bucket carrier belt with 3 test results with different 1 hp motors get test results 1 = 22.5 kg/m , test 2 = 21.3 kg/m , and test 3 = 22.7 kg/m , with average result– average 22.1 kg/m. The noise test on the Bucket Elevator gets the results of noise intensity at 3 different points with an average value of point 1 (front) = 77.7 dBA, point 2 (side) = 72.0 dBA, and point 3 (top) = 77, 1dBA.
Studi Kasus Penjadwalan Proyek: Frame Acid Skid dengan Gant Chart dan Critical Path Method Pujo Leksonowati, Nur Fitria; Pamungkas, Nurman; Stefani, Windy; Purba, Adi Syahputra; Manurung, Meilani Mandhalena; Batubara, Ninda Hardina; Gunawan, Leo Van
Journal of Applied Mechanical Technology Vol 3 No 1 (2024): Journal of Applied Mechanical Technology (JAMET)
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/journalofappliedmechanicaltechnology.v3i1.53

Abstract

This study examines the scheduling of the Frame Acid Skid project at the Lombok Steam Power Plant (PLTU) using Gantt Chart and Critical Path Method (CPM). The primary objective is to identify the causes of delays and propose optimization measures for the project duration. Data collected indicates a significant difference between the planned duration (24 days) and the actual project completion time (47 days). The main delays occurred in the welding and painting phases, each requiring an additional 13 days. Contributing factors include the addition of a welding process for materials not covered in the initial contract and specification mismatches in the painting phase. Analysis with Gantt Chart and CPM reveals that enhanced communication, more detailed initial planning, and strict monitoring of project specifications are crucial to minimize the impact of delays on cost and time. The results of this study provide a strong basis for decision-making in similar future projects.
PERACANGAN DAN PEMBUATAN STABILIZER PERAHU MATERIAL KOMPOSIT SERAT JERAMI DAN RESIN POLYESTER Ghozali, Muhamad; Endramawan, Tito; Van Gunawan, Leo
Jurnal Permadi : Perancangan, Manufaktur, Material dan Energi Vol 6 No 03 (2024): JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/permadi.v6i03.167

Abstract

Penelitian ini bertujuan untuk merancang dan membuat stabilizer perahu dari material komposit berbahan serat jerami padi dan resin polyester. Latar belakang penelitian ini adalah penggunaan stabilizer perahu tradisional yang masih menggunakan bahan bambu dan busa yang kurang efisien serta masalah limbah jerami padi yang belum dimanfaatkan secara optimal. Metode penelitian melibatkan pembuatan spesimen dengan berbagai fraksi volume serat dan resin, kemudian dilakukan uji tarik dan uji bending untuk menentukan kekuatan komposit yang dihasilkan. Hasil pengujian menunjukkan bahwa fraksi volume serat 5% dan resin 95% menghasilkan kekuatan tarik dan bending tertinggi dengan nilai masing-masing 20,75 N/mm² dan 192,94 N/mm². Berdasarkan hasil analisis simulasi menggunakan Solidworks, desain stabilizer dengan komposisi serat 15% dan resin 85% dipilih untuk digunakan dalam aplikasi lapangan. Stabilizer yang dihasilkan menunjukkan kinerja yang baik dalam uji lapangan, dengan nilai faktor keamanan sebesar 1.087,56. Penelitian ini menyimpulkan bahwa komposit serat jerami padi dapat menjadi alternatif bahan yang kuat, ringan, dan ekonomis untuk stabilizer perahu.
Penerapan Teknologi Bar Bending Machine Untuk Meningkatkan Kemandirian Bumdes Desa Segeran Kecamatan Juntinyuat Kabupaten Indramayu Leo Van Gunawan; Tito Endramawan; Muhamad Ghozali; Mostars Mathew Iglesias Sitohang; Muhammad Nur Hidayat
DEDIKASI PKM Vol. 6 No. 1 (2025): DEDIKASI PKM UNPAM
Publisher : Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/dkp.v6i1.45072

Abstract

Badan Usaha Milik Desa (Bumdes) Segeran Kec. Juntinyuat Kab. Indramayu memiliki beberapa lini usaha seperti usaha pengolahan jeruk dan bengkel pengelasan. Dalam bidang usaha bengkel pengelasan Bumdes membantu desa dalam pembuatan infrastruktur seperti pembuatan tiang lampu jalan dan penutup saluran selokan. Namun mereka terkendala penekukan besi yang akan digunakan sebagai infrastruktur. Besi yang dijual di pasar masih berbentuk batang. Besi perlu ditekuk agar sesuai dengan desain rancangan infrastruktur yang telah dibuat. Proses penekukan besi di Desa Segeran ini masih manual menggunakan tangan. Hal ini membuat proses produksi menjadi lebih lama. Diperlukan mekanisasi dalam proses penekukan besi agar pekerjaan menjadi lebih cepat. Bar Bending Machine merupakan mesin penekuk besi yang menggunakan konsep rotary bending. Penerapan teknologi ini terbukti dapat mempercepat proses penekukan besi saat digunakan di Bumdes Desa Segeran.
Co-Authors Abdul Aziz Abdul Rakhman Abdul Rohmat Adi Kusmayadi Adimas, Adimas Afnanto, Nurul Ahmad Farhan, Ahmad Amat, Mohammad Azwar Badruzzaman Badruzzaman Badruzzaman Badruzzaman Baharudin, Budi Batubara, Ninda Hardina Cahyagi, Danang Candra Irawan Casiman Sukardi Ceba Muhamad Ar-Rasyid Dian Prabowo Dzulfiqar, Mohamad Alif Endramawan, Tito Haris, Emin Hermawan, Muhammad Ghandy Razzaki Hety Dwi Hastuti Jayamulya, Agus Karjo, Ardy Kusmayadi, Adi Manurung, Meilani Mandhalena Marwan Effendy Mohammad Amat Mohammad Azwar Amat Mostars Mathew Iglesias Sitohang Muhamad Ghozali Muhamad Ghozali, Muhamad Muhammad Ghozali Muhammad Luthfi Muhammad Luthfi Muhammad Nur Hidayat Nabilah, Prita Retno Nota S Nota, Nota Ali Sukarno Novrianda, Raju Nur Rohmat, Yusup Octavianus Ardhian Nugroho Pamungkas, Nurman Pradana, Claudha Alba Puger Satya Andika Pujo Leksonowati, Nur Fitria Purba, Adi Syahputra Rachmatullah Riandi, Maxc Reno Rona Rifani, Ari Khoeri Rizky Maulana Akbar Rohmat, Abdul Simanjuntak, Naomi Margaretha Stefani, Windy Sukarno, Nota Ali Sukroni Sukroni Sukroni Sukroni Sukroni, Sukroni Sunaryo Supriatun, Evi Suwahyo - Suwandi, Dedi Syaifurrahman, Arief Unggul Satria Jati Yoga, Ihsan Ade Zainuddin, Zainuddin