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All Journal Jurnal Rekayasa Mesin Eksergi: Jurnal Teknik Energi Journal of Mechanical Engineering and Applied Technology
Nailul Ulum, Muhammad Showi
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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RANCANG BANGUN ALAT CETAK PLASTIK VAKUM UNTUK MENURUNKAN PROSENTASE CACAT PRODUK DI LABORATORIUM METROLOGI DAN CETAK PLASTIK Nailul Ulum, Muhammad Showi; Harmanto, Sri; Satito, Aryo; Yanuar, Padang; Hamid, Abdul; Iyadul, Fatih
Journal of Mechanical Engineering and Applied Technology Vol. 2 No. 3 (2024): VOLUME 2 ISSUE 3 YEAR 2024 (NOVEMBER 2024)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v2i3.6074

Abstract

AbstrakVacum Forming is process packaging in industrial, wich one deformation of plastic and formed on mold with difference preassure. In food and drinking industrial show positive progress and make bigger contribution for economic grow in Indonesia. At this moment Vacum Forming industrial in Indonesia is just owned big industrial wich have good purchasing power tools in range hundreds of million to billions of rupiah. Metrologi dan Cetak Plastik laboratory in Teknik Mesin Politeknik Negeri Semarang one of the topics is Vacum Forming. Equipment Used is very simple, manny time try and erors needed for have good product without any defects by way temperature varible, pressure, warm-up time and forging. The most difficult is warm-up process where must tu set the hight temperature waring and gap between the material and the heater. The purpose of the research is to know the influence of warming temperatures, time of warming, thick of plastic and pressure on the quality, The result of this research the best variable is time for warm-up 135 second, time of forging 40 second. Ticknes variable is 0,5 mm, 0,3 mm and 0,25mm, the best ticknes of plastic is 0,25 mm.
PERUBAHAN SUHU BAHAN BAKAR PREMIUM UNTUK MENGETAHUI DAYA PADA MESIN SUZUKI KATANA Nailul Ulum, Muhammad Showi; SU'UDY, AHMAD HAMIM; SAI'IN, ALI; ADITAMA, SURYA
Eksergi Vol. 17 No. 2 (2021): MEI 2021
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (776.196 KB) | DOI: 10.32497/eksergi.v17i2.2601

Abstract

Bahan bakar jenis premium masih menjadi banyak incaran konsumen kalangan menengah kebawah, bahan bakar premium memiliki nilai octane paling rendah, daya yang dihasilkan juga paling rendah dari bahan bakar jenis pertalit dan pertamax. Banyak kalangan berlomba untuk mencari cara bagaiman meningkatakan efisiensi dalam pemakaian bahan bakar jenis premium. Pemanasan mula bahan bakar merupakan salah satu cara untuk meningkatkan efisiensi dalam proses pembakaran, dengan pemanasan mula pada bahan bakar mampu membuat partikel bahan bakar cepat untuk menguap. Tujuan dalam penelitian ini adalah untuk mengetahui pengaruh variasi pemanasan bahan bakar melalui upper tank radiator terhadap daya mesin pada mesin Suzuki SJ410. Variasi yang digunakan adalah bahan bakar tanpa pemanas, bahan bakar dengan panjang pipa 450 mm, dan 900 mm dengan diameter pipa 6 mm. dengan putaran mesin 2500 ”“ 5400 Rpm. Metode yang digunakan untuk mengolah data adalah dengan One-Way Anova. Hasil penelitian menunjukkan bahwa ada perbedaan yang signifikan penggunaan variasi pemanasan bahan bakar terhadap daya pada mesin Suzuki SJ410 dengn daya tertinggi sebesar 29,90 HP pada 4500 RPM dengan panjang pipa 900 mm.
Effect of variations fuel heating on fuel consumption for the Suzuki SJ410 engine Safriana, Eni; Nailul Ulum, Muhammad Showi; Indrawati, Ragil Tri; Putri, Farika Tono
Eksergi Vol. 19 No. 2 (2023): MAY 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/eksergi.v19i2.4471

Abstract

AbstractMeans of transportation is one of the needs to make the movement from one place to another. One of the commonly used transportation is motorized vehicles that run on gasoline. Fuel consumption affects the power generated as well as the costs incurred and the time required by motorized vehicles to carry out their functions. This research method uses true experimental design research to conduct performance tests using a Suzuki SJ410 motorized vehicle with an F10A type engine and a capacity of 970 cc.  The test was carried out by carrying out the treatment of heating premium fuel through a copper pipe that was installed on the radiator upper tank with a length of 450 mm (MOD 1) and 900 mm (MOD 2) and also under standard conditions (STD). The results obtained stated that fuel consumption under standard conditions (STD) fuel consumption for 26.03 s/50 ml, for a pipe length of 450 mm (MOD 1) for 31.90 s/50 ml and for a pipe length of 900 mm ( MOD 2) for 33.27 s/50 ml.    
Variasi Frekuensi pada Electric Rotary Table Berbasis Inverter Guna Menurunkan Cycle Time dan Cacat Produk pada Pengelasan Pipa Kapiler Nailul Ulum, Muhammad Showi; Prasetyo, Nanang Budi; Sai'in, Ali; Su'udy, Ahmad Hamim; Hamid, Abdul; Purnomo, Dwi
Jurnal Rekayasa Mesin Vol. 18 No. 3 (2023): Volume 18, Nomor 3, Desember 2023
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v18i3.5082

Abstract

Abstract  Cycle Time is a matter that must be considered in production time, a good Cycle Time will support the targets that must be met, even if Cycle Time decreases, production will also increase and company turnover will also Increase. In the case study of PT Arisamandiri Pratama, one of its productions is in the form of AC parts, namely capillary pipes which still use a manual rotating table to rotate the pipe to be welded so that it is unable to reach the target of 800 parts / hour with an average Not Good product of 93 parts / day. The design of an inverter-based electric rotary table can reduce cycle time, but how much frequency will affect the results of a welding, not that the faster the welding process the better, the faster the welding will affect the vibration of the table machine which will have an impact on the welding results. By experiment the inverter frequency setting is expected to get a frequency value with maximum speed but no vibration on the rotation table, the frequency used is between 700 Hz to 1500 Hz with an interval of 100 Hz. The experimental results show that the best frequency is 1000 Hz, with a rotation speed of 16 rpm with a production capacity of 935 parts / hour with Not Good products of 59 parts / day or a decrease in Not Good products by 42.1% per day
Rancang Bangun dan Analisis Mesin Pemimpil Jagung dengan Daya Motor Listrik 1 HP Nailul Ulum, Muhammad Showi; Tantoko, Ajid; Wahyudi, Anis Fuad; Saputra, Efendi Rika
Journal of Mechanical Engineering and Applied Technology Vol. 1 No. 2 (2023): Volume 1 Issue 2 Year 2023 (July 2023)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v1i2.4878

Abstract

Sheller postharvest handling is a way to get attention. Corn sheller machine with 1 hp electrical machines power is designed to make it easier to scale postharvest handling household. This machine has using the final round 280 rpm. By the time the electric machines is turned on, the first pulley mounted on the motor will rotate and move the belt pulleys 2 then connected and will move the pulleys 3 and then move the disk sheller who will perform sheler inserted through the sleeve corn sheller and corn seeds will come out through the outlet of the seed corn and cob will exit through the outlet cob. This machine is operated semi-automatically by turning on the switch in the ON position and turn off the switch in the OFF position, and this machine can function properly as expected.Keyword : disk sheller , electrical machines, shealer corn machines,  
ANALISA NILAI OVERALL EQUIPMENT EFECTINESS (OEE) PADA MOWER DAN MESIN BRUSH-CUTTER DALAM PROSES PEMOTONGAN RUMPUT DI BANDAR UDARA ABC Setyarini, Rianti; Muna, Naila Sa”™adatil; Hamid, Abdul; Nailul Ulum, Muhammad Showi
Journal of Mechanical Engineering and Applied Technology Vol. 2 No. 1 (2024): VOLUME 2 ISSUE 1 YEAR 2024 (MARCH 2024)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v2i1.5499

Abstract

Proses pemotongan rumput di Bandar Udara ABC adalah bagian penting dalam pengelolaan landscape. Penelitian ini bertujuan untuk mengetahui efektivitas mesin yang digunakan untuk pemotongan rumput. Hasil analisis ini dapat menjadi tolak ukur bagi perusahaan untuk meningkatkan kinerja mesin yang ada, menambah mesin, atau mengganti mesin sebagai upaya memaksimalkan produktivitas pengelolaan landscape di Bandar Udara ABC. Dalam studi kasus ini, mesin pemotong rumput yang digunakan terdiri dari 2 Mower Kubota L3800 dan 5 Mesin Brush-cutter Tanaka. Efektivitas mesin diukur dengan menggunakan Overall Equipment Effectiveness (OEE). Masing-masing nilai OEE untuk Mower 1 dan 2 adalah 47.05% dan 42.08%. Sedangkan untuk mesin Brush-cutter 1, 2, 3, 4, dan 5 adalah 43.46%, 43.49%, 46.75%, 48.41%, dan 44.72%. Nilai OEE mesin pemotong rumput ini masih belum memenuhi standar kriteria yang ditetapkan JIPM yaitu 85% untuk efektivitas sangat baik dan 60% untuk batas wajar efektivitas mesin. Sehingga hasil dari penelitian ini dapat digunakan sebagai bahan pertimbangan bagi pengelola bandara dalam melakukan perbaikan maupun perawatan untuk menghindari turunnya produktivitas.
OPTIMASI PAREMETER PENGELASAN SMAW TERHADAP HASIL UJI TARIK MENGGUNAKAN METODE TAGUCHI PADA POSISI 3G Lukman, Muhammad; Hamid, Abdul; Nailul Ulum, Muhammad Showi
Journal of Mechanical Engineering and Applied Technology Vol. 3 No. 3 (2025): VOLUME 3 ISSUE 3 YEAR 2025 (NOVEMBER 2025)
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jmeat.v3i3.7178

Abstract

This research aims to optimize the Shielded Metal Arc Welding (SMAW) process parameters on tensile strength using the Taguchi method in the 3G welding position. The study investigates the effects of welding current, electrode type, and electrode soaking time on the quality of weld joints. The base material used was ASTM A36 steel, welded with E7016 and E7018 electrodes at current settings of 85 A and 95 A. The experimental design employed a Taguchi L4 (2³) orthogonal array, resulting in four parameter combinations. Performance analysis used the Larger is Better Signal-to-Noise (S/N) ratio approach. The optimum parameter combination was found at 85 A welding current, E7016 electrode, and 30 minutes of electrode soaking, achieving a maximum average tensile strength of 404.35 MPa. Analysis of Variance (ANOVA) revealed that the most influential factor on tensile strength was electrode soaking time (57.65%), followed by electrode type (32.38%), and welding current (9.97%). The absence of residual error indicates a highly efficient and reliable experimental model. This study confirms that the Taguchi method is an effective approach to optimize SMAW parameters, enhance weld joint quality, and minimize trial-and-error efforts in the welding process. Keywords: SMAW Welding, Tensile Test, Taguchi Method, 3G Position, Parameter Optimization, ANOVA.
Co-Authors Abdul Hamid Ahmad Hamim Su’udy Dwi Purnomo Indrawati, Ragil Tri Iyadul, Fatih Muhammad Lukman Muna, Naila Sa”™adatil Padang Yanuar Prasetyo, Nanang Budi Putri, Farika Tono Safriana, Eni Sai'in, Ali Saputra, Efendi Rika Satito, Aryo Setyarini, Rianti Sri Harmanto Surya Aditama Tantoko, Ajid Wahyudi, Anis Fuad