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All Journal PISTON (Jurnal Ilmiah Teknik Mesin Fakultas Teknik UISU) Sinkron : Jurnal dan Penelitian Teknik Informatika JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY JURNAL PENDIDIKAN TAMBUSAI Indonesian Journal of Electrical Engineering and Computer Science Jurnal Tunas Jurnal MESIL (Mesin Elektro Sipil) JiTEKH (Jurnal Ilmiah Teknologi Harapan) Jurnal SImetri Rekayasa Journal of Renewable Energy, Electrical, and Computer Engineering Sinergi Polmed : Jurnal Ilmiah Teknik Mesin Jurnal Pengabdian Masyarakat Gemilang (JPMG) Prioritas : Jurnal Pengabdian Kepada Masyarakat Madani: Multidisciplinary Scientific Journal Prosiding Seminar Nasional Teknik UISU (SEMNASTEK) Journal of Multidisciplinary Research and Innovation (JMRI) Buletin Utama Teknik

JUNAIDI

Universitas Harapan Medan

Author-ID : 1734481

Religion Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Analisa Kekerasan Baja Carbon Steel 1045 Akibat Perlakuan Panas Yang Di Dinginkan DenganUdara,Air dan Oli Menggunakan Metode Vickers Rizky Auditya Putra; Junaidi Junaidi; Fadly A Kurniawan
Jurnal Simetri Rekayasa Vol 2 No 2 (2020): Edisi Oktober 2020
Publisher : Universitas Harapan Medan

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ABSTRACT Steel is a material that we often use to make tools, both heavy and light equipment as well as food containers and many others. Steel is the material most widely used as an industrial material, because steel has various physical and mechanical properties. Carbon steel is an alloy between iron and carbon with small amounts of Si, Mn, P, S, and Cu. The nature of carbon steel is very dependent on the carbon content, if the carbon content increases, the strength and hardness will also increase. The property of steel which can undergo great deformation under the influence of high tensile stress without breaking or breaking is called the ductility property. The method used in this research is descriptive method, which is a method used to carefully test an object being studied so that accurate data will be obtained after data collection is complete, data processing will be carried out using a predetermined formula. Average value - diagonal average identification before heat treatment with a pressure load of 2000 grams at point 1 (top) 111.85 at point 2 (middle) 107.4 and at point 3 (bottom) 118.9. Number of hardness of the vickers with a load of 2000 grams at point 1 (top) 296.5 at point 2 (middle) 321.6 and at point 3 (bottom) 262.4. The average number of 1045 carbon steel testing before heat treatment is 293.5. From the conclusion of the study using 1045 carbon steel steel, there can be differences in the average diagonal identification value after heat treatment using water as a coolant with a pressure of 2000 grams at point 1 (above) 71 at point 2 (center) 131.80 and at point 3 ( bottom) 93. The number of vickers hardness with a load of 2000 grams at point 1 (top) 735.8 at point 2 (middle) 213.5 and at point 3 (bottom) 428.8 The average number of testing 1045 carbon steel after heat treatment with water as a coolant is 459.37. The diagonal mean value of identification after heat treatment using oil media as a coolant with a pressure load of 2000 grams at point 1 (above) 96.81 at point 2 (center) 107.54 and at point 3 (bottom) 100.09. Vickers hardness figure with a load of 2000 grams at point 1 (top) 395.7 at point 2 (center) 320.7 at point 3 (bottom) 370.2. The average number of testing 1045 carbon steel after heat treatment using oil media as a coolant with a value of 362.20. The diagonal mean value of identification after heat treatment using air as a coolant with a pressure load of 2000 grams at point 1 (top) 132.51 at point 2 (center) 140.38 and at point 3 (bottom) 125.49. Vickers hardness figure with a load of 2000 grams at point 1 (top) 211.2 at point 2 (center) 188.2 at point 3 (bottom) 235.5. The average number of testing 1045 carbon steel after heat treatment using air as a coolant with a value of 211.63. Keywords: steel, carbon steel, properties of carbon steel, hardness test, before and after heat treatment with water, oil, air as a coolant

OPTIMASI KINERJA TURBIN PELTON RESPON KEMIRINGAN BUCKET DENGAN DIAMETER NOSEL MENGGUNAKAN SOFTWARE STATISTIKA Rizky Gunawan; Junaidi Junaidi; Fadly Kurniawan
Jurnal Simetri Rekayasa Vol 2 No 1 (2020): Article April 2020
Publisher : Universitas Harapan Medan

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Pelton turbine is a type of impulse turbine that converts all water energy into velocity energy before entering the turbine runner. The power generated in the water turbine (Pelton turbine) varies depending on the flow or flow of incoming water to turn the turbine.This research was conducted in the mechanical engineering laboratory of the Faculty of Mechanical Engineering, Universitas Harapan Medan. The experimental method is the method used in this study. Pelton Turbine performance optimization of bucket slope response and nozzle diameter using statistical software. Based on the results of the Pelton Turbine Testing Graph using the Taguchi method, the response of the bucket slope with the Maximum Rotation nozzle diameter, namely at -8º Bucket slope, produces a turbine rotation of 416.7 Rpm with a nozzle diameter of 19 mm. while with maximum power, the bucket tilt of 8º produces a turbine load of 405 watts with a diameter of 19 mm.

Optimum reactive power to improve power factor in industry using genetic algortihm Ahmad Yani; Junaidi Junaidi; M. Irwanto; A. H. Haziah
Indonesian Journal of Electrical Engineering and Computer Science Vol 14, No 2: May 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v14.i2.pp751-757

Capacitor bank is a collection of power tools in the form of a capacitor that serves as a tool that can reduce or improve reactive power into the power grid. The load on the electricity network in general is an inductive load. If the average power factor (cos ϴ) is less than 0.85, the State Electricity Company will provide the reactive power in KVAR fines usage charges on customers. An effort should be done to reduce the reactive power. An installation of bank capacitor is suitable to be implemented in an industry AC loads. It will reduce the reactive power and improve the power factor. In the case of 380 V, 50 Hz, 500 kW AC loads are improved the power factor from 0.7 to 0.93 using genetic algorithm, thus the AC loads current and reactive power will be decreased. It is suitable that the AC loads current is inversely proportional to the power factor, and the reactive power is proportional to the AC loads current.

Pelatihan Penggunaan Perangkat Lunak (Software) Autocad untuk Gambar Teknik bagi Siswa SMK Negeri 4 Medan Fadly A. Kurniawan Nasution; Ade Irwan; Junaidi Junaidi
Prioritas: Jurnal Pengabdian Kepada Masyarakat Vol 2 No 02 (2020): EDISI SEPTEMBER 2020
Publisher : Universitas Harapan Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35447/prioritas.v2i02.250

Sekolah Menengah Kejuruan (SMK) Negeri 4 Medan merupakan salah satu SMK Negeri dengan status kepemilikan Pemerintah Pusat yang berada di kota Medan. Sekolah ini beralamat di Jl. Sei Kera No. 132, Pandau Hilir, Kec. Medan Perjuangan, Kota Medan, Provinsi Sumatera Utara. SMK Negeri 4 Medan didirikan pada tahun 1966 dan mengantongi SK pendirian sekolah dengan No. SK: 156/DIRPT/BI/1966. SMK ini terakreditasi A, dan memiliki berbagai jurusan keahlian yang salah satunya adalah Teknik Kendaraan Ringan. (Kemdikbud, 2019)

ANALISIS PEMELIHARAAN BERKALA PADA MOTOR DIESEL GENERATOR SET DAYA 90 kVA SEBAGAI ENERGI LISTRIK CADANGAN DI UPT RUMAH SAKIT KHUSUS PARU Muhammad Salim Siregar; Junaidi Junaidi; Ade Irwan; Husin Ibrahim
SINERGI POLMED: Jurnal Ilmiah Teknik Mesin Vol. 3 No. 1 (2022): Edisi Februari
Publisher : Politeknik Negeri Medan

Berkembangnya teknologi peralatan kesehatan yang berhubungan dengan elektrikal, sangat dituntut adanya pengelolaan dan pengawasan yang baik terhadap sarana dan prasarana elektrikal di rumah sakit, dimulai dari perencaan, pemasangan, pengujian, pengoperasian, sampai pemeliharaan, sehingga listrik yang digunakan pada peralatan kesehatan tersebut aman dan efisien. Mengetahui dan mempelajari cara pemeliharaan (maintenance) genset secara berkala sesuai dengan Peraturan Menteri Kesehatan Republik Indonesia No. 2306 Tahun 2011 di UPT Rumah Sakit Khusus Paru. Untuk mengetahui tingkat ketersediaan operasional genset (generator set) diperlukan membuat terlebih dahulu data peralatan genset, perhitungan tingkat ketersediaan dan data operasional dan kerusakan yang didapat. Kemudian dikumpulkan jumlah spesified operating time (SOT), jumlah total kerusakan (T) dan jumlah genset tidak dioperasikan untuk keperluan pemeliharaan rutin/berjadwal, karena pemeliharaan (S) dan total waktu pemeliharaan Genset dalam jangka waktu yang telah ditetapkan. Dari SOT dikurang jumlah total waktu pemeliharaan, akan didapat nilai Actual Operating Time (AOT) Genset. Data SOT dan AOT diperlukan untuk menghitung tingkat ketersediaan Genset sebagai catu daya cadangan. Kemudian AOT = SOT-(S+T), jumlah kerusakan diperlukan untuk menghitung mean time between failures (MTBF). tingkat rata-rata keandalan (reliability) Genset pada tahun 2020 memiliki nilai Rata-rata 99,7%. Tingkat Keandalan termasuk kedalam kelompok jarang mengalami gangguan (≥ 95%). tingkat Ketersediaan (availibility) genset pada tahun 2020 memiliki nilai rata-rata 98,6%, tingkat ketersediaan genset termasuk kedalam kelompok jarang rusak (R≥95%).

Perancangan Unit Pengisian Pada Mesin Pengisian Botol Otomatis Berbasis PLC I Arif; Junaidi; Yulfira
Jurnal MESIL (Mesin Elektro Sipil) Vol. 3 No. 2 (2022): Jurnal MESIL (Mesin Elektro Sipil)
Publisher : Cered Indonesia Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53695/jm.v3i2.818

Currently, many people create a Micro, Small and Medium Enterprise (UMKM) for their source of income, both in terms of businesses engaged in the culinary world, fashion (fashion), and so on. One of them is the mineral water business in packaging. In this business, of course, the business owner must make a tool in order to meet the demands of consumers in terms of time and good results in the shortest possible time. This is the basis for the author to design an automatic filling machine with an MSME scale that will help business owners of bottled Mineral Water by pressing lower prices and making its application simpler for ordinary people to use technology. In designing the filling unit in this automatic liquid filling machine, a simple filling system is used. Nozzle only serves to stop the liquid flowing, continue the flow of water using only gravity as pressure to drain the liquid. The filling system in this liquid filling uses PLC as the main driving unit. . In the ladder diagram there are also several types of commands that are most often used in programming such as the TON (Time On Delay) command whose function is to determine the time of each automation process. The next command is the CTU (Counter Up) command whose function is to set the number of bottles that will be read by the sensor. In this study, the average speed for filling is Automatic filling of 500ml bottles takes about 15.62 seconds, while in 250 ml bottles requires a charging time of 7.81 seconds. In the design also found delay caused by automatic system programming of 3 seconds when pneumatic down, and 1 second when pneumatic up. So that in 1 minute, filling a 500ml bottle with a filling time of 15.62 plus a delay of 4 seconds, then in 1 minute the filling machine can fill 12 500ml bottles.

Perancangan Conveyor Pada Mesin Pengisi Botol Otomatis R S Manullang; Junaidi; D A Ritonga
Jurnal MESIL (Mesin Elektro Sipil) Vol. 3 No. 2 (2022): Jurnal MESIL (Mesin Elektro Sipil)
Publisher : Cered Indonesia Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53695/jm.v3i2.819

Technology continues to develop from time to time with all the innovations that aim to ease all human affairs, from the industrial world aspect. Human needs are increasing, developing and varying, to meet the needs of the industry requires a tool that can control and control the machining process automatically so as to simplify and save human labor, such as designing an automatic conveyor on an automatic bottle filling machine using a PLC (Programmable Logic Controller). With a PU (polyurethane) conveyor belt material that is rough, slippery and elastic, the surface of the belt conveyor works horizontally and can carry bottles at a conveyor speed that uses a 12v DC power window motor, a speed of 90 rpm and a torque of 3N.m without a load. The speed of the conveyor with a bottle distance of 1mm and has a time of 6.82 s, then the result of a one-way bottle speed is 0.146 m/s.

Studi Kualitas Permukaan Pembubutan Kering Pada Baja Aisi 4340 (± 35 HRC) Menggunakan Pahat PVD dan CVD Berlapis W Setiawan; Junaidi; Yulfitra
Jurnal MESIL (Mesin Elektro Sipil) Vol. 4 No. 1 (2023): Jurnal MESIL (Mesin Elektro Sipil)
Publisher : Cered Indonesia Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53695/jm.v4i1.833

The machining operation should be targeted at dry or near dry machines to avoid environmental problems associated with the use of cutting fluids. To overcome the above situation, 80% of all machining operations are carried out with superior cutting tools such as CBN and ceramics. However, the price for the lathe chisel is still quite expensive. Cheaper carbide cutting tools are seen as a possible replacement for CBN and Ceramic insert cutting tools and are mostly processed by chemical vapor deposition (CVD) and physical vapor deposition (PVD) techniques. Therefore, a study was conducted on the performance of both PVD tools and CVD coated tools which is very important to recommend the appropriate tool for machining AISI 4340 steel. The workpiece used in this research is AISI 4340 steel (±35 HRC) and the tool used is plated PVD and CVD chisels. The tool used in this study to measure surface roughness is the Stylus Profilometer. The turning process is carried out with 8 cutting conditions using a CNC lathe. In this dry turning research, the most significant variables on surface roughness, surface roughness mathematical equations and also optimal cutting conditions were found, namely cutting speed (v) = 180 m/min, feed motion (f) = 0.2 mm/rev and depth cut (a)= 0.2mm and surface roughness (Ra)= 2.178 micron.

Analisa Kerusakan Shaft Bottom Mold Pada Mesin Blowmolding Type Parker M F Harahap; Junaidi; D Aswan
Jurnal MESIL (Mesin Elektro Sipil) Vol. 4 No. 1 (2023): Jurnal MESIL (Mesin Elektro Sipil)
Publisher : Cered Indonesia Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53695/jm.v4i1.860

Blow Moldin`g Type Pa`rker is a` ma`chin`e for the process of formin`g products ma`de of pla`stic by in`jectin`g it first for the pla`stic feeder to be blown`. If sa`les a`re high, Pa`rker's Blow Moldin`g Type work is a`lso very high. Ma`in`ten`a`n`ce or ma`in`ten`a`n`ce of ma`chin`es a`n`d equipmen`t tha`t is ca`rried out is very n`ecessa`ry in` ca`rryin`g out production` process a`ctivities so tha`t they ca`n` run` smoothly. The resea`rch method used in` this resea`rch is the study of litera`ture a`n`d the a`pplica`tion` of preven`tive a`n`d corrective ma`in`ten`a`n`ce methods. The type of da`ma`ge tha`t often` occurs in` the Pa`rker type blow moldin`g ma`chin`e is the sha`ft bottom mold compon`en`t which often` gets a` liftin`g loa`d tha`t exceeds the idea`l ca`pa`city of the liftin`g loa`d. The results of this study a`re the ma`ximum liftin`g force of the sha`ft bottom mold is 1.87 ton`s with a` sha`ft len`gth of 25 cm with a` dia`meter of 2.5 cm a`n`d usin`g the type of preven`tive ma`in`ten`a`n`ce, n`a`mely ma`in`ten`a`n`ce to preven`t before the occurren`ce of da`ma`ge. Where the compa`n`y will pa`y for corrective ma`in`ten`a`n`ce of IDR 130,200,000 per yea`r. If compa`red, the compa`n`y will ta`ke preven`tive mea`sures of Rp. 62.160.000,- per yea`r, then` the differen`ce in` trea`tmen`t is Rp. 68.040.000,.

Analisa Kerusakan Pada Sistem Kopling Mobil Toyota Rush Menggunakan Metode Uji Sem (Scanning Electron Microscope) N Syahputra; Junaidi; Yulfitra
Jurnal MESIL (Mesin Elektro Sipil) Vol. 4 No. 1 (2023): Jurnal MESIL (Mesin Elektro Sipil)
Publisher : Cered Indonesia Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53695/jm.v4i1.861

The` powe`r tra`nsfe`r syste`m broa`dly consists of clu`tch u`nits, tra`nsmissions, de`fe`cts, on the` a`xis a`nd ve`hicle` whe`e`ls. While` the` position of the` clu`tch u`nit a`nd its compone`nts (clu`tch a`sse`mbly), is loca`te`d a`t the` front e`nd a`nd powe`r tra`nsfe`r syste`m on the` ve`hicle`. In a`ccorda`nce` with its fu`nction, na`me`ly to bre`a`k a`nd conne`ct, the` u`nit de`cide`s a`nd conne`cts the` flow of powe`r / motion / mome`nt from the` ma`chine` to the` powe`r tra`nsfe`r syste`m. The` ba`ckgrou`nd of the` a`u`thor in choosing the` title` of this stu`dy is du`e` to the` la`ck of knowle`dge` of ve`hicle` u`se`rs in ca`ring for the` clu`tch syste`m, so tha`t sma`ll da`ma`ge` will be` la`rge` a`nd will incre`a`se` the` cost of ma`inte`na`nce` a`nd re`pa`ir, disru`ption tha`t ofte`n occu`rs in the` clu`tch syste`m is we`a`r on the` clu`tch pla`te`, a`s we`ll a`s da`ma`ge` to the` compone`nt Othe`rs du`e` to la`ck of tre`a`tme`nt. This stu`dy u`se`s a` friction te`st me`thod. In the` re`su`lts of the` re`se`a`rch da`ma`ge` occu`rre`d in the` clu`tch syste`m is we`a`r a`u`s, we`a`k ple`nde`s, dry dra`gh tha`t ca`n ca`u`se` da`ma`ge` to the` clu`tch syste`m. The` ma`in fa`ctor tha`t ca`u`se`s da`ma`ge` to the` clu`tch syste`m is hu`ma`n e`rror or drive`r ofte`n u`se`s ha`lf a` clu`tch tha`t ca`n ca`u`se` da`ma`ge` to the` clu`tch syste`m a`nd ca`ble`. Su`gge`stions The` improve`me`nt is do not ofte`n u`se` ha`lf the` clu`tch a`nd do re`gu`la`r se`rvice`.

Co-Authors Abd Rahman Mustharaynal Akhyar Ade Irawan Ade Irwan Ade Irwan Adrian, Jefri Ahmad Yanie Ahmad Yanie Ananda, Yussa Andre Waskito Andri Herlambang Anggri Abdirullah B Pradana Barus, Brema Sanjaya Catra Indra Cahyadi Dani, Agus Ramah Denni, Denni Din Aswan A. Ritonga Din Aswan A. Ritonga Din Aswan Amran Ritonga Din Aswan Ritonga Dwivan Asri E Eddy Eddy Koto F A Kurniawan F A Kurniawan F h dongoran Fadli Ahmad Kurniawan Nasution Fadly A Kurniawan Fadly A. Kurniawan Fadly A. Kurniawan Nasution Fadly A. Kurniawan Nasution Fadly A.Kurniawan Fadly Ahmad Kurniawan Fadly Ahmad Kurniawan Fadly Ahmad Kurniawan Fadly Ahmad Kurniawan Fadly Ahmad Kurniawan Nasution Fadly Ahmad Kurniawan Nst Fadly Kurniawan Fadly Kurniawan Fitriana, Liza Gustama Putra Alhadi Harahap, Muhammad Ali Akbar Harun Harun Herdika Sahputra Hutabarat, Michael A G I Arif Ibrahim, Husin Indra Gusandi Panjaitan Indra Roza Irwa, Ade Jimmi Lauren Siahaan Joko Prasetyo Kurniawan, Fadly A. Kurniawan, Fadly Ahmad Liza, Risko M F Harahap M. Ichsan M. Imam Gunadi M. Irwanto M. Rinoza Marja, R I Maulana Siddiq Sitepu Metro Martogi Manullang Mhd. Rusydi Zain Muhammad Arifin Muhammad Bayu Prakoso Muhammad Idris Muhammad Iman Muhammad Putra Rizky Muhammad Rizky Barus Muhammad Salim Siregar Muhammad Yusuf Rahmansyah Siahaan N Syahputra Nasution, F A K Nasution, Fadli Ahmad Kurniawan Ndruru, Bernadet Deriman Hati Nst, Agus Almi Pandia, Ardian Victori Piktor Abadi Hutagaol Pradipta, Aditya Agung Pratama, Adam Pratama, Lodri R S Manullang Rambe, Supriadi Anwar Randy, Said Muhammad Richardo Chonfu M. Sinaga Riky Triswandi Ritonga, Din Aswan A Ritonga, Din Aswan Amran Rizky Auditya Putra Rizky Gunawan Sandi Saputra Sarjana Sarjana SAWITRI, DARA Sembiring, Oscar Fredriek Siahaan, Fadhil Ali Siddiq, Daffa Maulana Siregar, Lisa Adriana Siswo Pranoto Sofwan Lubis Syurkarni Ali Veri Akhmal Ramadhan Syah W Setiawan Weriono Y, Yulfitra Yanie, Ahmad Yoga Pratama Yogie Saputra Yopan Rahmad Aldori Yudi Andri Mulis Yulfitra Yulfitra, Yulfitra

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