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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Majalah Ilmiah MOMENTUM Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Surya Teknika Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) SAINSTEK Excellence Proksima AGRONES: JOURNAL OF AGRICULTURE, AGRIBUSINESS WELFARE, TECHNOLOGI, HUMANITY, ENVIRONMENT, SOCIAL AND ECONOMY

Abdul Khair Junaidi

Unknown Affiliation

Author-ID : 758292

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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The Effect of GTAW Welding Current on the Strength of AISI Steel 1045 Abdul Khair Junaidi; Machdalena Machdalena; Weriono Weriono; Hariman Hariman; Firdaus M
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 66 No 1 (2022): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Welding is a process of joining materials by melting metal at high temperatures. Gas Tungsten Arc Welding (GTAW) is one of welding method to join metals. This welding process will affect the mechanical properties of a material. So, it is necessary to conduct a study on changes in mechanical properties that occur. This study aims to determine the mechanical properties of AISI 1045 medium carbon steel using the GTAW welding process with a current variation of 80 A and 100 A. The welding was used the AWS EWTh-1 tungsten electrode and ER70S-G filler wire. The type of connection was used a butt weld joint and a single V groove seam with an angle of 60o. The standard of ASTM E8 was used for the manufacture of tensile test specimens. The results of tensile testing with welding current of 80 A was obtained an average stress of 518.463021 N/mm2 and the strain of 19.55%. For welding with a current of 100 A, the average stress was 548.814727 N/mm2 and the strain of 26.44%. Based on the fracture that occurred in the specimen, the critical area for fracture was the Heat Affecting Zone (HAZ), which the area has undergone a phase change during the cooling process. The weld area of connection part in the welding process has higher strength than the HAZ area.

Production Process of Front Lights on Anoa 2 6x6 Special Vehicles at PT. Pindad (Persero) Abdul Khair Junaidi; Nandha Syamza; Tri Subagyo
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 65 No 1 (2021): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

The headlights on Anoa 2 6x6 special vehicles are used for street lighting for anoa tanks at night. The purpose of this study was discussed the steps of production process of the Anoa 2 6x6 headlights in PT. Pindad. The headlight component was made in several manufacturing processes that were carried out. It consists of many parts, which a variety of production machines for the manufacture of each part. The manufacturing of the headlight components using machining processes such as laser cutting, welding, and drilling. The type of material used for the manufacture of the headlights and parts that was Aluminum Alloy 2044 and Steel ST-37. The result components were made the headlight frame, BT protectors, the front, side, and rear components.

Effect of Cutting Depth and Feed Speed to Surface Roughness in Lathe Process of Screw Conveyor Shaft (Case Study: PT. RAPP) Junaidi Abdul Khair; Deni Pranata; Ujang Nuhadek
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 64 No 2 (2020): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

The metalworking process is one of the most important things in manufacturing of machine components, such as lathe process. Therefore, it is required continuously innovation to improve production quality. There are several ways to do this, for example by choosing the right type of tool, depth of cut, and spindle speed. In turning process for the production of goods is very important to produce a precision product in accordance to desiring of size and roughness. The turning speed of a lathe has a type of spindle rotation rate that is used according to production requirements, which uses a rotational speed that can be changed the rate of rotation of the machine, in order to determine the level of surface roughness in the turning process. One is affected the optimal conditions of the turning speed and feeding rate. In this paper, the variations of different rotational speed levels of low speed, medium speed and high speed according to variations of feeding rate in order to know the difference in roughness results for the screw conveyor shaft operation. The roughness was measured on the surface turning process using a reference of surface roughness stand comparator (ISO2632 / I-1975). The result of test revealed the greater speed of feed rate, the greater value of roughness. Reversely, the smaller speed of feed rate affected the lower roughness value.

Control of Automatic Beverage Bottle Filling Process Using P and Team Viewer IoT Imnadir Imnadir; Abdul Khair Junaidi; M. Dalil
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 66 No 2 (2022): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

The development of an on-line process control system in the Industry is a major requirement in the context of the efficiency of machines and improving the quality of production during the Covid-19 period. As well as in the learning system and practicum students are required to be able to study independently, and lecturers must be able to develop themselves in on-line learning methods. The on-line learning process is not just to transfer learning modules to students, but must be able to guide students in an unlimited time, whenever students need an explanation of the material provided. TeamViewer is an application that provides a solution that is used to remotely control another PC or laptop. By knowing the ID and password are provided by TeamViewer on the PC that want to remote. Then, it just entered the TeamViewer application installed on the PC. The use of this team viewer was tested against the control of the beverage bottle filling process. The result is that by using Android the process of controlling beverage bottle filling. It turns out that, it can be operated to fill beverage bottles for different size, namely by setting the data delay on the program 3.2 seconds for the 120 ml bottle size, 4.0 seconds for the 200 ml bottle size, and 5.0 seconds for the bottle size of 300 ml.

Effect of Gear Transmission System to Vibration Test Machine Abdul Khair Junaidi; Weriono Weriono; Nazaruddin Nazaruddin; Deden MS
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 2 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i2.347

This research aims to investigate the vibration analysis for equipment test of chassis. The frame model of the gear transmission vibration test is developed. The prototype of the vibration and noise testing tool was constructed for the gear transmission system. The vibration equipment test consists of three gears that function as a gear transmission. The chassis is considered to be one of the vital elements of equipment. The rotation of gears and shafts can occur the vibration. The simulation with the 3D model using ANSYS was resulted in structure analysis. The simulation was resulted in total deformation, equivalent strain, and equivalent stress where the structure of the equipment was definitely safe and had good stability.

Placement Sensor Modification of Photo Interrupter and ATDC Sensor on the Minolta Bizhub-421 Photocopy Machine Imnadir Imnadir; Rudi Z.A; Abdul Khair Junaidi; M Dalil
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 67 No 2 (2023): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v67i2.345

Minolta photocopiers produce very good and reliable photocopier quality during their lifetime with the condition that the toner must be replaced with the original. If it is replaced by refilling, then refilling can only be done an average of three times. Meanwhile, replacement by refilling is needed by small and medium business units (SMEs) in an effort to save costs. Recharging that exceeds the average three times will cause the Minolta photocopier to have an error with code C032. Therefore, this paper was conducted to increase the frequency of the toner refill process as a solution for the Minolta Bizhub 421 machine to minimize losses due to interference with code C032. So, the machine can be refilled repeatedly without interruption, as well as adding error information via SMS using an Arduino microcontroller. Method was used experimental of placement sensor modification of photo interrupter and ATDC (After Top Dead Center) sensor. The results showed that after modifying the sensor placement, the number of refills could be increased to an average usage of toner exceeding 12 refills before the error code C032 occurred. This was because of the opto sensor was covered by toner powder and with an indicator that controlled the toner rotation it had reached set point. Then, with SIM 800L, which sends SMS and miss call notifications to users with a success rate of 98% and 2% error. Therefore, it helps users of the Minolta Bizhub 421 photocopier can more easily supervise the toner tube.

Increasing speaking Ability through YouTube video for Engineering Students at Sekolah Tinggi Teknologi Pekanbaru Amsa, Helfany; Junaidi, Abdul Khair; Franchisca, Sherly; Astuti, Indri; Burhan, Kristian
EXCELLENCE: Journal of English and English Education Vol 4 No 1 (2024): EXCELLENCE
Publisher : English Education Study Program FKIP Universitas Alwashliyah Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47662/ejeee.v4i1.823

The focus of the research is the use of YouTube as a learning media in English classes for mechanical engineering students. The purpose of using YouTube videos is to improve students' speaking skills and create a comfortable classroom environment, and increase students' enthusiasm for learning in class. This study uses a descriptive qualitative approach. Students speak with more confidence and are more expressive as a result of the highly effective use of YouTube media in the classroom. In addition, students do not need to worry about the phrases they use when speaking English because they have already witnessed how foreigners speak fluently and correctly.

Pengaruh Fraksi Volume Dan Sudut Konfigurasi Serat Phyllostachys Terhadap Kekuatan Komposit Dengan Metode Hand Lay-Up ., Weriono; Junaidi, Abdulkhair; ., Rinaldi; Isra, Adi; Kurniawan, Mauliade
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11171

Plyllostachys bamboosoides known in Asia, also called bamboo fence, is one of the choices for the construction and manufacture of furniture. Its properties also make it useful in a number of arts and crafts. The influence of ductility and toughness factors is at the microcellular level; which includes the pattern of arrangement, morphology, and mechanical properties of bamboo cells. The perfect combination of fibers and compressible parenchyma cells is the key to the excellent flexible deformation of bamboo, originally illustrated the elongation of parenchyma cells under bending through low resolution electron micrographs. The angle of the microfibrils in the cell wall plays an important role in the mechanical properties of the wood and the occurrence of interface delamination followed by matrix failure and fiber breakdown under natural growth. Tensile strength and strain due to the influence of variations in thickness and volume of composite composition with variations in manufacturing methods that can affect its mechanical properties so that it is expected to determine a good composition. The addition of bamboo fiber as a filler of Polyester resin has a significant effect on the tensile strength. Tensile testing with an angle of 450 with a thickness 1 mm resulted in the highest ultimate stress 0.027 M.Pa with 25%:75% polyester resin of bamboo fiber. The tensile strength is increased by increasing the volume of the bamboo fiber and reducing the thickness of the bamboo fiber increases the tensile strength of the composite.

Perhitungan Ongkos Pemesinan Konvensional Menggunakan Macro Vba Excel pada Studi Kasus (Produk Roda Gigi Payung Ø65mm × Z24) Junaidi, Abdul Khair; Hasan, Indra; Syofian Arief, Dosi; Duta H, Ryan
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.6802

In the conventional machining process, production costs are essential to know to determine the cost of making a product in any industrial manufacturing such as the SMK N 2 PEKANBARU machining workshop. Machining production costs are calculated based on machining time per product and machining operation costs. In calculating conventional machining costs, the VBA Excel macro is an application that can be used to calculate production costs. The Ø65mm × z24 umbrella gear product which is the research case study is a product that is machined by two conventional machining processes, namely lathe machining and milling machining. From the results of the research, the cost of conventional lathe machining, namely making gear wheels, is IDR 47,841/product, and the conventional milling process, namely making Z24 gears, is IDR 40,002/product, while the machining cost for lathe mastercam simulation is IDR 33,187/product and the machining cost for milling mastercam simulation is IDR 20,340/product. Machining costs are the product of operating costs per minute (cm) and machining time (tm). So, from the results of calculating machining and production costs, it is known that the product manufacturing costs or production costs for Ø65mm × Z24 umbrella gears are in the range of IDR 111,827 - IDR 146,143/product.

Analisa Sifat Mekanik Proses Pack Carburizing AISI 4340 dengan Temperatur Kristalisasi 725°C Menggunakan Karbon Tandan Kelapa Pratiwi, Sheliona; Khair Junaidi, Abdul; Weriono, Weriono; Ahmad Rambe, Ibrahim
JURNAL ILMIAH MOMENTUM Vol 20, No 2 (2024): Vol 20, No 2
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v20i2.12573

Penelitian ini menganalisis sifat mekanik baja AISI 4340 setelah proses pack carburizing menggunakan karbon dari tandan kelapa pada temperatur kristalisasi 725°C. Metode carburizing yang digunakan dengan menggunakan pack yang terbuat dari stainless steel yang ditutup rapat. Pada pack terdapat karbon tandan kelapa, spesimen uji dan katalis abu kerang sebanyak 10% sebagai katalis. Tujuan utama adalah mengetahui perubahan kekerasan permukaan, kekuatan impact, kekuatan tarik dan struktur mikro setelah karburisasi, serta pengaruh serbuk tandan kelapa sebagai media karbon. Hasil penelitian menunjukkan bahwa sebelum carburizing, baja AISI 4340 memiliki kekerasan permukaan 78.9 HRC, kekuatan impact 129.56 Joule, kekuatan tarik 948.8 Mpa dan struktur mikro terdiri dari perlite dan ferrite. Setelah karburizing dengan media karbon tandan kelapa dan katalis abu cangkang kerang 10%, kekerasan permukaan meningkat menjadi 94.5 HRC, kekuatan impact menjadi 175.2 Joule, kekuatan tarik menjadi 1,012.9 Mpa, patahan tetap berbentuk cup and cone menunjukkan sifat mekanik ulet dan struktur mikro terbentuk perlite, ferrite serta banit. Kesimpulannya, penggunaan serbuk karbon tandan kelapa dalam proses pack carburizing meningkatkan sifat mekanik baja AISI 4340.

Co-Authors Afrizal, Efi Ahmad Rambe, Ibrahim Amsa, Helfany Arif, Dodi Sofyan Arif,, Dodi Sofyan Burhan, Kristian Dalil, M Deden MS Deni Pranata Dinova, Alfito Dodi Sofyan Arief, Dodi Sofyan Duta H, Ryan Firdaus M Hariman Hariman Holyness Nurdin Singadimedja Imnadir Imnadir Imnadir, Imnadir Indarto, Kabul Indra Hasan Indri Astuti Isra, Adi Koto, Jaswar Kurniawan, Mauliade M. Dalil Mendofa, Dyon Shaputra Nandha Syamza Nazaruddin Nazaruddin Pertiwi, Eka Pratiwi, Sheliona Rambe, Ibrahim Ahmad Rinaldi Rinaldi . Rudi Z.A Sherly Franchisca Syofian Arief, Dosi Tri Subagyo Ujang Nuhadek Weriono

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