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All Journal Jurnal Teknik Mesin Rekayasa Mesin Info-Teknik JURNAL PENGABDIAN KEPADA MASYARAKAT JOURNAL OF SCIENCE AND APPLIED ENGINEERING Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Jurnal Energi dan Teknologi Manufaktur Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Journal of Welding Technology Otopro JURPIKAT (Jurnal Pengabdian Kepada Masyarakat) Jurnal Pengabdian Polinema Kepada Masyarakat Jurnal Pengabdian dan Pemberdayaan Nusantara (JPPNu) Bulletin of Science Education Indonesian Community Journal Jurnal Pengabdian Kepada Masyarakat Journal of Mechanical and Electrical Technology Logic : Jurnal Rancang Bangun Dan Teknologi Jurnal Teknik Mesin, Industri, Elektro dan Informatika Asian Journal Science and Engineering Journal of Mechanical Engineering Venus: Jurnal Publikasi Rumpun Ilmu Teknik Journal of Evrimata: Engineering and Physics Journal of Community Engagement
Kris Witono
Jurusan Teknik Mesin Politeknik Negeri Malang
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Influence of MIG Welding Process Parameters on the Strength of Bimetal Joints: Study of Gas Flow Rate and Macrofractures Talifatim Machfuroh; Witono, Kris; Riskitasari, Septyana; Puspitasari, Etik
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 3 (2024): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i3.141-149

Abstract

Bimetal joints are often used in various industries, such as automotive, power generation, electronics, and manufacturing. This is because bimetal joints allow the joining of two types of metal with different properties. Welding two different types of metal can pose its own challenges, such as the difficulty of controlling welding parameters so that the results are optimal for both types of metal, as well as differences in the thermal and mechanical properties of the two metals. This has led to extensive research on bimetal plate connections. Based on this background, this research aims to determine the effect of variations in flow rate and current strength on the tensile strength of robotic welding bimetal welded joints, as well as determine the results of macro photos of fractures resulting from tensile tests for each variation. The research was carried out experimentally where each variation was repeated with data 3 times. Based on the results and discussion, it is known that the optimal gas flow rate in general is 20 l/min, where the tensile strength reaches 353.1442 MPa–455.5458 MPa. At this flow rate, the dominant fracture occurs in the base metal and is ductile, which indicates good plastic deformation. On the other hand, gas flow that is too low or too high causes joint defects and reduces the tensile strength. Meanwhile, other welding parameters, namely variations in welding current, affect tensile strength. At a gas flow of 10 l/min, increasing the current to 180 A produces the highest tensile strength of 449.4357 MPa with ductile fracture characteristics. However, at a current of 120 A there is a significant decrease due to overheating, especially at higher gas flows such as 20 l/min and 30 l/min, which results in brittle fracture in the heat-affected zone (HAZ). The results of this research contribute to the understanding of the influence of welding parameters on the tensile strength and fracture characteristics of bimetallic joints. This research can be a reference for the development of more efficient and reliable welding processes in various industries, such as automotive, power generation and manufacturing, which require bimetallic joints with optimal quality.
Analisis Kekuatan Lentur Pegas Daun Truk dan Mobil Hasil Tempering Raihan Insan Nararya; Kris Witono; Asrori Asrori; Eko Yudiyanto; Syamsul Hadi
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 3 No. 1 (2025): Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v3i1.717

Abstract

Leaf springs are one of the suspension systems that are still widely used in various modes of transport such as cars and trucks. The spring functions to support the load and reduce vibration from operational activities. This study aims to analyse the bending strength and hardness of steel leaf springs of trucks and cars resulting from tempering heat treatment. The three point bending method was used as the flexural strength testing method and the Rockwell C Hardness method testing was used for hardness testing with leaf springs in raw, tempered 460°C, and tempered 510°C conditions. From the results of the study, the highest average bending strength value of 3733,55 MPa was obtained and an average roughness value of 31,8 HR was obtained for the 510°C tempered truck leaf springs. This also applies to the 510°C tempered car leaf springs, where the average bending strength value obtained is 3392,65 MPa and the average hardness value obtained is 29,5 HR. Thus, it is recommended that tempering heat treatment that can be applied to truck and car leaf springs be carried out at 510°C to increase the bending strength and ductility of the leaf springs.
Pengaruh Jumlah Pelat dan Berat Katalis pada HHO Generator Tipe Dry Cell terhadap Emisi Gas Buang Akka Sunoko; Kris Witono
Jurnal Teknik Mesin (Sinta 3) Vol. 21 No. 1 (2024): APRIL 2024 (SINTA 3)
Publisher : Institute of Research and Community Outreach, Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/jtm.21.1.1-10

Abstract

Tujuan penelitian adalah untuk mengetahui interaksi penambahan jumlah pelat dan berat katalis NaOH pada tiap hho generator tipe dry cell terhadap kadar emisi gas buang yang dihasilkan kendaraan bermotor. Variabel yang diuji adalah jumlah pelat yaitu 11, 15 dan 19 menggunakan jenis pelat stainless steel pada HHO generator dan berat katalis yaitu 10, 20, dan 30 gram dengan jenis katalis yang digunakan yaitu NaOH. Metode pengumpulan data pada penelitian ini menggunakan alat gas analyzer yang dilakukan sebanyak 3 kali setiap putaran 1000 rpm, 2000 rpm, 3000 rpm, 4000 rpm, dan 5000 rpm. Hasil yang didapatkan interaksi antara jumlah pelat dan berat katalis NaOH berpengaruh dalam mengurangi kadar emisi gas buang CO dan HC. HHO Generator dengan jumlah pelat 19 dan berat katalis 30 gram paling efektif dalam mengurangi kadar emisi gas buang CO sebesar 2,84 % pada putaran mesin 5000 RPM dan menurunkan kadar HC yakni 173,33 ppm pada putaran mesin 1000 RPM, disebabkan karena laju produksi gas brown yang dihasilkan lebih banyak sehingga mampu untuk mengoptimalkan proses pembakaran sehingga mengurangi kadar emisi CO dan HC yang dihasilkan oleh kendaraan bermotor.
Optimizing Flexibility in SUP9 Leaf Springs: The Synergistic Effect of Tempering Temperature and Holding Time Kris Witono; Agustriyana, Lisa; Hadi Susilo, Sugeng
Asian Journal Science and Engineering Vol. 4 No. 1 (2025): Asian Journal Science and Engineering
Publisher : CV. Creative Tugu Pena

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51278/ajse.v4i1.1886

Abstract

This study investigates the influence of tempering temperature and holding time on the flexibility of SUP9 steel leaf springs, addressing a practical need for enhanced vibration absorption in heavy-duty vehicles operating on irregular terrain. An experimental study was conducted using a full factorial design with three temperature levels (450°C, 550°C, 650°C) and three holding times (15, 20, 25 minutes). Flexibility was quantified by measuring the maximum deflection in a three-point bending test. The results demonstrate a strong, positive correlation between the tempering parameters and flexibility. The optimal flexibility (47.76 mm deflection) was achieved at the highest treatment condition of 650°C with a 25-minute holding time, representing an 83% improvement over the least effective treatment. ANOVA results confirmed that temperature, holding time, and their interaction are all statistically significant factors (p < 0.05). These findings provide a practical, data-driven guideline for manufacturing more resilient and comfortable leaf springs by optimizing heat treatment protocols.
Optimasi Parameter Suhu Manifold dan Tekanan Injeksi Pada Proses Injection Blow Molding Untuk Meminimalkan Cacat Flashing Produk Botol Hdpe 120 ML Witono, Kris; Amrullah, Miftahul
Journal of Mechanical Engineering Vol. 2 No. 3 (2025): July
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/jme.v2i3.4474

Abstract

Penelitian ini bertujuan untuk mengoptimalkan parameter suhu manifold dan tekanan injeksi pada proses Injection Blow Molding (IBM) guna meminimalkan cacat flashing pada produk botol HDPE berukuran 120 mL. Cacat flashing merupakan kelebihan material yang membeku di sekitar bibir cetakan dan berpengaruh terhadap kualitas akhir produk. Metode yang digunakan adalah pendekatan kuantitatif eksperimental dengan desain faktorial. Variabel bebas dalam penelitian ini adalah suhu manifold (250°C, 255°C, 260°C) dan tekanan injeksi (45 bar, 50 bar, 55 bar). Penelitian ini dilakukan menggunakan mesin IBM dengan pengukuran cacat flashing pada masing-masing kombinasi parameter menggunakan vernier kaliper digital presisi. Hasil analisis ANOVA dua arah menunjukkan bahwa kedua parameter, baik suhu manifold maupun tekanan injeksi, memberikan pengaruh signifikan terhadap ukuran cacat flashing. Suhu manifold memberikan kontribusi sebesar 32,18% dan tekanan injeksi sebesar 64,75% terhadap variasi data. Kombinasi optimal diperoleh pada suhu manifold 250°C dan tekanan injeksi 45 bar, yang menghasilkan cacat flashing terkecil sebesar 0,07 mm. Analisis regresi dan grafik interaksi mengindikasikan bahwa terdapat hubungan interaktif antara kedua parameter terhadap cacat flashing. Dengan demikian, pengaturan simultan suhu dan tekanan sangat penting untuk mengontrol cacat dan meningkatkan kualitas produk dalam proses IBM. Hasil penelitian ini dapat dijadikan acuan dalam pengaturan proses produksi botol plastik maupun produk sejenis lainnya.
Analisis Kekuatan dan Makrostruktur Sambungan Las MIG Aluminium Akibat Variasi Kuat Arus Machfuroh, Talifatim; Witono, Kris; Agustriyana, Lisa; Rosady, Siti Duratun Nasiqiati
Metrotech (Journal of Mechanical and Electrical Technology) Vol 4 No 2: Mei 2025
Publisher : Fakultas Sains dan Teknologi, UNIRA Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/metrotech.v4i2.7154

Abstract

Alumunium merupakan material yang ringan dan tahan karat, namun sifat konduktivitas termal yang tinggi dari alumunium sangat mempengaruhi kualitas hasil lasan. Parameter pengelasan angat mempengaruhi kekuatan sambungan lasan, hal ini sudah dibuktikan oleh bebrapa penelitian yang ada. Selain itu metode pengelasan dan jenis material pengisi juga berpengaruh terhadap kekuatan sambungan. Meskipun demikian pengelasan pada material alumunium sangat jarang dilakukan karena tingkat kesulitan yang tinggi. Pengaruh variasi kuat arus pengelasan pada aspek makroskopik dan kekuatan mekanik sambungan las MIG aluminium masih belum banyak dieksplorasi secara mendalam. Oleh karena itu, penelitian ini dilakukan dengan tujuan untuk menganalisis hubungan antara kuat arus pengelasan terhadap struktur makro dan performa mekanik sambungan, sehingga dapat memberikan kontribusi dalam optimalisasi proses pengelasan MIG pada material aluminium. Metode yang digunakan adalah eksperimental dengan pengujian tarik dan foto makro hasil patahan. Dari data uji tarik kemudian dilakukan analisa pengaruh kuat arus terhadap kekuatan tarik sambungan alumunium. Penelitian ini nantinya dapat dijadikan rujukan untuk industri yang memerlukan proses penyambungan alumunium, semisal pada industri pembuatan kapal, manufaktur, struktur bangunan yang membutuhkan konstruksi ringan dan kuat, dan sebagainya. Berdasarkan penelitian ini didapatkan bahwa variasi kuat arus mempengaruhi kekuatan tarik sambungan las MIG aluminium secara signifikan. Arus 115 A cenderung menghasilkan kekuatan tarik yang lebih stabil dan tinggi pada kecepatan sedang (40–50 cm/menit), sementara kombinasi arus 125 A dan kecepatan tinggi (70 cm/menit) menghasilkan kekuatan tarik tertinggi dalam pengelasan, meskipun pada kecepatan rendah justru tidak terlalu unggul. Dengan demikian pemilihan parameter pengelasan yang tepat sangat mempengaruhi kekuatan sambungan, khususnya untuk sambungan alumunium.
Rancangan Feeder Circlip untuk Meningkatkan Produktivitas Proses Machining pada Line Swing Arm di PT. Astra Otoparts Tbk. Divisi Nusametal Robbi Malik; Kris Witono
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 3 No. 4 (2025): Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v3i4.1060

Abstract

In manufacturing industries, machining processes play a critical role in ensuring product quality, precision, and production efficiency. However, in the production of swing arm parts, the machining process has been identified as a bottleneck due to its non-optimal cycle time. One of the main issues contributing to this inefficiency is the disorganized handling of circlip inner parts. These components are often scattered without a designated placement system, which creates significant difficulties for operators when retrieving and installing circlips onto the swing arm. Such abnormalities disrupt workflow continuity, extend production time, and reduce overall productivity. To address this challenge, a circlip feeder machine was designed as a supporting device to assist operators and streamline the machining process. The design emphasizes efficiency, integration, and systematic operation by utilizing readily available workshop materials. The developed feeder machine is equipped with a robust frame construction and has a storage dimension capable of accommodating up to 200 circlips. In addition, mechanical analysis demonstrates that the feeder structure can withstand a maximum applied force of 31,475 N, ensuring durability and reliability during operation. The introduction of this circlip feeder machine directly impacts the production process by reducing operator workload, minimizing delays caused by disorganized parts, and ensuring faster and more accurate installation of circlips. Consequently, the overall machining cycle time is shortened, thereby improving production flow and enhancing the efficiency of swing arm part manufacturing. Beyond immediate time savings, the use of the feeder machine contributes to better resource utilization, reduced ergonomic strain on operators, and improved consistency in product quality. This study highlights the significance of simple yet effective mechanical innovations in overcoming production bottlenecks and optimizing manufacturing processes in automotive component industries.
SUSTAINABLE COMMUNITY SERVICE INNOVATION: IMPLEMENTING SOLAR POWER AND WATER FILTERS ON POULTRY FARMS IN TULUNGAGUNG REGENCY Asrori, Asrori; Nugroho, Pipit Wahyu; Yudiyanto, Eko; Witono, Kris; Adiwidodo, Satworo; Gunawan, Chandra; Rifa’i, Muhamad; Jaya, Harie Satiyadi
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 9 No. 3 (2025): SEPTEMBER
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v9i3.3033

Abstract

A community service initiative was undertaken at UD. Risky Barokah, an egg-laying poultry farm in Sumberingin Kidul, Ngunut District, Tulungagung Regency. Operating since 2010 on a 7,000 m² site with nearly 10,000 chickens, the farm has faced persistent challenges related to water contamination and high electricity costs. To mitigate these constraints, a solar-powered water filtration system and a 1.1 kWp photovoltaic installation were implemented. The intervention was directed toward improving poultry health and egg productivity through access to clean water, reducing dependence on the electrical grid, and strengthening staff capacity through technical training. Outcomes demonstrated estimated monthly electricity savings of Rp247,500–Rp330,000 and consistent water quality that enhanced flock health and output, while simultaneously lowering the farm's carbon footprint. The project highlights the applicability of renewable energy and appropriate technology in promoting sustainable and cost-effective poultry production.
INSTALLATION OF SOLAR-POWERED ELECTRIC WARMERS FOR DOC-BROODING IN BLITAR CHICKEN FARMERS Asrori, Asrori; Yudiyanto, Eko; Adiwidodo, Satworo; Witono, Kris; Rahmad, Cahya
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 7 No. 4 (2023): DESEMBER
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v7i4.2103

Abstract

Community Service (PPM) is held in Sumberejo Village, Sanankulon District, Blitar Regency. Chicken farmers face several challenges related to heating their chicken coops, including restrictions on using subsidized fuel or LPG, which force them to seek other heating alternatives. Leaks in heating systems that use LPG, which pose a fire hazard. Poor air quality and low oxygen levels in coops that use conventional heating methods (firewood and LPG). These challenges can contribute to the decline in the quality of Day-Old Chicks (DOC). This activity aims to install an electric warmer system that produces a safe and comfortable temperature for Day-Old Chicks (DOC) and is easy to use for breeders. In addition, build an independent energy source to run the heat treatment system equipment in the DOC-Brooding area with a solar panel installation. The installed 600 Wp PLTS system consists of 4 solar panels with a capacity of 150 Wp each, an 850 VA hybrid inverter and 100 Ah VRLA battery. Electrical energy from PLTS can power a 200 W electric warmer. The solar panel installations can produce an average of 3.6 kWh of electrical energy/day. So that the electricity savings from PLN can reach IDR. 162000 per month.
INNOVATIVE COOLING SYSTEM: SOLAR-POWERED WATER SPRAYERS FOR CATTLE SHEDS IN TULUNGAGUNG REGENCY Asrori, Asrori; Nugroho, Pipit Wahyu; Yudiyanto, Eko; Witono, Kris; Buwono, Haris Puspito; Hidayat, Mohammad Noor
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 8 No. 4 (2024): DESEMBER
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v8i4.2477

Abstract

The Community Service (CS) project was implemented in Sumberingin Kidul Village, Ngunut District, Tulungagung Regency, East Java. The target beneficiary was UD. Arta Lumintu, a local SME engaged in beef cattle farming. The farm, established in 2017, was temporarily closed due to the Covid pandemic and resumed operation after a year. Key challenges included high temperatures (24-31°C) and humidity (74-77%), which negatively impacted cattle productivity and excessive electricity consumption for cattle shed operations. The project aimed to address these issues by installing a water spray system with a high-pressure pump and an off-grid solar power system. The system effectively reduces temperature and humidity in the sheds while minimizing electricity costs. The installation consists of a 540 Wp solar panel, a 1500 VA Smart inverter, a 100 Ah VRLA battery, and six pressurized water sprinkler points positioned in various areas of the cattle sheds, powered by a 350 W booster pump. This initiative improves farm efficiency, supports energy independence, and introduces smart farming technology to benefit local farmers.
Co-Authors Abd. Muqit Agus Hardjito Agus Harijono Agus Setiawan AGUS SETIAWAN Agus Sujatmiko Akhlis Rizza, Muhammad Akhmad Faizin Akhmad Faizin Akka Sunoko Amrullah, Miftahul Asrori , Asrori Asrori Asrori Bagus Wahyudi Bambang Irawan Bambang Irawan Bayu Pranoto Bima Cahya Maula Dana Budi Eko Prasetyo Danang Risky Suhadi Dani, Agus Duratun Nasiqiati Rosady, Siti Eka Perkasa, Rilis Eko Yudiyanto Elka Faizal Elka Faizal Etik Puspitasari Etik Puspitasari, Etik Faizal, Elka Gumono Gumono Gunawan, Chandra Hadi Samsul Hadi Susilo, Sugeng Hangga Wicaksono Hangga Wicaksono Harie S Jaya Harijono, Agus Haris Puspito Buwono Heru Prasetyo Heru Suryanto Heryanto Heryanto Kasijanto Kasijanto Kasijanto, Kasijanto Lisa Agustriyana Listiyono Moh. Hartono Moh. Nasir Mohammad Noor Hidayat Muhammad Fakhruddin NASIR, MOH. Nugroho, Pipit Wahyu Nurhadi Pondi Udianto Pranoto, Bayu Purwoko Purwoko Putu Wijaya Sunu R.N. Akhsanu Takwim, R.N. Akhsanu Rahmad, Cahya Raihan Insan Nararya Ratna Monasari Rifa’i, Muhamad Riskitasari, Septyana Risno Bayu Riswan E.W. Susanto Riswan E.W. Susanto Robbi Malik Rudy Soenoko Sadar Wahjudi Samsul Hadi Sarjiyana Satworo Adiwidodo SEPTYANA RISKITASARI Siti Duratun Nasiqiati Rosady Subagiyo Subagiyo Sugeng Hadi Susilo Sugeng Hadi Susilo Sulistyono Sulistyono Syamsul Syamsul Hadi Syamsul Ph.D M.A. Hadi Talifatim Machfuroh Talifatim Machfuroh Talifatim Machfuroh, Talifatim Walid, Achmad Wicaksono, Hangga Wirawan , Wirawan Yudy Surya Irawan Yuniarto Agus Winoko Zakki Fuadi Emzain