Article Per Year (5 Year)
p-Index From 2021 - 2026
5.909
P-Index
This Author published in this journals
All Journal Rekayasa Mesin LONTAR Jurnal Teknik Mesin Undana (LJTMU ) Prosiding Semnastek ROTOR: JURNAL ILMIAH TEKNIK MESIN Jurnal Rekayasa Mesin Jurnal Akta JTT (Jurnal Teknologi Terpadu) Machine : Jurnal Teknik Mesin Manutech : Jurnal Teknologi Manufaktur Sprocket : Journal of Mechanical Engineering JTTM: Jurnal Terapan Teknik Mesin Integrated Science Education Journal Dulang: Jurnal Pengabdian Kepada Masyarakat Prosiding Seminar Nasional Inovasi Teknologi Terapan Jurnal Inovasi Teknologi Terapan
Zaldy Kurniawan
Teknik Mesin, Politeknik Manufaktur Negeri Bangka Belitung
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

Published : 44 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 44 Documents
Search

 1   2   3   4   5 
STUDI EKSPERIMEN PENGARUH SUHU HARDENING DENGAN QUENCHING MEDIA AIR LAUT TERHADAP KETANGGUHAN BAJA ST 60 Abdillah Halim; Muhammad Subhan; Zaldy Kurniawan
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 01 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ST 60 steel is a medium carbon steel that is often used in machine construction such as shafts and shipbuilding, but impact loads often occur. The purpose of this study was to determine the best toughness of st60 steel from the effect of temperature on the hardening process. The method used for data processing in this study is the two way ANOVA method without interaction. The variables used in this study were temperature (900, 930, 950⁰C) and holding time (30, 60, 90 minutes). The best toughness results were obtained at a temperature of 900⁰C with a holding time of 30 minutes (2.5934 J/mm2) with the lowest toughness results were obtained at a temperature of 950⁰C and a holding time of 90 minutes was obtained at (2.5588 J/mm2).
Cooling Media–Driven Shift in Dominant Machining Mechanisms: A Taguchi-Based Optimization of Surface Roughness in CNC Milling of S45C Steel Fatullah Faing; Eko Yudo; Zaldy Kurniawan
Integrated Science Education Journal Vol 7 No 1 (2026): January
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/isej.v7i1.2643

Abstract

Purpose of the study: Is to optimize the surface roughness in CNC milling of S45C steel using two types of cooling media: Dromus and radiator water. Methodology: This study employed the Taguchi experimental design method to compare cooling media. Three main machining parameters, namely spindle speed, depth of cut, and feed rate, were examined at three levels using a Taguchi L9 orthogonal array. In addition, two different cooling media, namely radiator water and Dromus, were applied to investigate their effects on surface integrity. Surface roughness values ​​were measured using a standard surface roughness tester and analyzed using the Signal-to-Noise (S/N) ratio, with the results supported by Analysis of Variance (ANOVA). Main Findings: The results demonstrate that cooling media play a decisive role not only in reducing surface roughness but also in shifting the dominant machining parameter. Under radiator water cooling, spindle speed was the most influential factor, contributing 45.67% to surface roughness variation. In contrast, when Dromus was applied, depth of cut became the dominant parameter with a contribution of 63.40%. Dromus consistently produced lower surface roughness values and higher S/N ratios, indicating improved thermal control and process stability. The optimal machining condition was identified at a spindle speed of 1910 rpm, a depth of cut of 0.2 mm, and a feed rate of 330 mm/min. Novelty/Originality of this study: The novelty of this study lies in revealing how cooling media fundamentally alter surface formation mechanisms and parameter dominance, offering new insights for adaptive and efficient CNC milling optimization strategies.
Analisis Perbandingan Pengaruh Media Pendingin Dromus dan Air Radiator Terhadap Kekasaran Permukaan Baja S45C Pada Proses CNC Miliing Fatullah Faing; Eko Yudo; Zaldy Kurniawan
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 2 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i2.430

Abstract

This study aims to analyze the comparative effect of Dromus and radiator water cooling media on the surface roughness of S45C steel in the CNC Milling machining process. The quality of the machined surface is a critical indicator in the manufacturing industry, necessitating parameter optimization to achieve maximum efficiency. The Taguchi method with an L9 orthogonal array experimental design was used to evaluate the influence of three process parameters: spindle speed, depth of cut, and feed rate. Tests were conducted with three replications for each combination, and data were analyzed using the Signal-to-Noise (S/N) ratio calculation with the "smaller-is-better" category and ANOVA to determine the contribution of each factor. The results showed that Dromus cooling media consistently provided lower and more stable surface roughness values compared to radiator water. The optimal parameter combination found was a spindle speed of 1910 rpm, a depth of cut of 0.2 mm, and a feed rate of 330 mm/min. Contribution analysis revealed that when using Dromus, the depth of cut was the most dominant factor (63.40%), whereas with radiator water, spindle speed was the primary factor influencing surface roughness (45.67%).
PENERAPAN METODE AQUEOUS PADA PROSES PENCUCIAN BEARING DALAM KEGIATAN PEMELIHARAAN MESIN DI PT TIMAH TBK UNIT SUNGAILIAT Marsela Abid Fajri Amarona; Okta Ibra Saputra; Robert Napitupulu; Zaldy Kurniawan
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 6 No. 1 (2026): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bearing is a shaft-supporting component that withstands radial and axial loads, making its cleanliness crucial for machine reliability. At PT Timah Tbk Unit Sungailiat, bearing cleaning is still carried out manually using diesel fuel, a method that is time-consuming, dependent on operator skills, and poses risks to health and safety. This final project applies a bearing washing machine with an agitation system based on aqueous cleaning, which uses water-based solutions combined with industrial detergents, as a safer and more efficient alternative. The construction includes the frame, power transmission system, main shaft and taper, bearing housing and seal, as well as a locking plate, which are then assembled and tested through no-load functional tests, load functional tests, and cleaning effectiveness tests on ball bearings and cone bearings. Additional evaluation was conducted through questionnaires with 13 respondents regarding design, ease of operation, cleaning effectiveness, work efficiency, and safety. The results show that the machine operated properly in both no-load and load tests. The average cleanliness level of bearings reached more than 90% within 10–15 minutes of washing. User evaluation scores were: ease of operation 4.6; design and ergonomics 4.3; cleaning effectiveness 4.4; work efficiency 4.3; and safety 4.0. Therefore, aqueous cleaning is feasible to be applied as an alternative to conventional cleaning methods, as it is more effective, safer for operators, and environmentally friendly, although improvements in safety and equipment stability are still required.
Co-Authors A Adjie Abdillah Halim Aiwa, Toto Angga, Muhammad Angga Pratama anggi saputra Arianda Pratama Arif Budi Pamungkas Ariyanto Ariyanto Arya Adjie Aswin, Fajar Azaki Azlan chardova, andreas Darta, Yuli Deri Saputra, Deri Dika Qomara Sari Djauhari Djauhari Eko Yudo Erick wiratama Erin Aftarini Erwansyah, Erwansyah Fachrezi, Rizki Faing, Fatullah Fatullah Faing Febriyansa, Agus Feriadi, Indra Findra Setyanto Firdi Irawan Geril Satrio Ramadhan Gilang Perdana Harwadi, Harwadi Hasdiansah, Hasdiansah Husman Husman I Mahyudi Ilham Ary Wahyudie Ival Ival Juanda Juanda Mahendra, Anan Marsela Abid Fajri Amarona Masdani, Masdani Muhammad Haritsah Amrullah Muhammad Subhan MUHAMMAD SUBHAN Muhammad Yunus Odidio Pratama Odidio Okta Ibra Saputra Oktriadi, Yudi Pranata, Yogi Pratama, Arianda Pratama, Randa Julio Pristiansyah, Pristiansyah Rapiansah Rapiansah Restu, Ilham Ridho Rosmansyah Robert Napitupulu Rodika Rollastin, Boy S.Pd. M Kes I Ketut Sudiana . Said Apreza Seva, Marcell Subakti, Yulian Sugianto Sugianto Suzen, Zaldy Sirwansyah Syamsul Arifin Trisna Fitri Mutiari Yuliyanto Yuliyanto Zanu Saputra Zulkipli Zulkipli