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All Journal Rekayasa Mesin Jurnal Teknik Mesin Indonesia Jurnal Engine: Energi, Manufaktur, dan Material
Winarno, Agustinus
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Aerospace Engineering Automotive Engineering Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Development of Accuracy Evaluation Method for Open Loop Educational CNC Milling Machine Winarno, Agustinus; Lasiyah, Sus; Tulung Prayoga, Benidiktus; Aris Hendaryanto, Ignatius; Sukidjo, Fransiskus Xaverius
Jurnal Rekayasa Mesin Vol 12, No 1 (2021)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2021.012.01.23

Abstract

The open-loop educational computer numerical control (CNC) milling machine requires accuracy verification in order to ensure its accuracy and functionality. In this paper, the new verification method is proposed based on the length measurement using the fringe counting of He-Ne laser interferometry. The ideal translation length is defined by the number of electric pulses generated by the micro-stepping driver, while the actual length is measured using He-Ne laser interferometry. In the experimental process, the data of the fringe pattern of the He-Ne laser and the number of electric pulses which drive the stepper motors were simultaneously acquired using an oscilloscope. Hence, the data has been analyzed to obtain the ideal and actual lengths by using an in-house program developed in Python. By comparing the actual translation and ideal length, the accuracy of the educational CNC milling machine has been evaluated to be 50 µm for the length up to 200 mm.
Analisis Re-Layout Line Machining Oil Separator dengan Metode Value Stream Mapping dalam Meningkatkan Efisiensi Produktivitas di PT Astra Otoparts Divisi Nusametal Rasyid, Adji Nur; Hendaryanto, Ignatius Aris; Setiawan, Widia; Winarno, Agustinus
Jurnal Engine: Energi, Manufaktur, dan Material Vol. 8 No. 2 (2024)
Publisher : Proklamasi 45 University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30588/jeemm.v8i2.1848

Abstract

The Oil Separator is a part produced by PT Astra Otoparts Nusametal Division. The products are manufactured on the machining line. The production process of part oil separator through several stages including CNC milling and lathe machining, washing part, and part verification process. Line machining oil separators have been found to have waste problems, namely moving manpower, waiting time process, and inappropriate processing, causing work imbalances in the production process. The job imbalance causes the daily production target not to be achieved as the company planned, so the customer needs cannot be met. The problem in this study was solved using the value stream mapping method to analyze the waste occurring and the impact resulting from the relayout line machining oil separator. The waste analysis is done by spreading questionnaires, waste weighting, value stream analysis tools selection (VALSAT), and cause analysis with fishbone diagrams. After that, some improvements were made to reduce the waste. Implementation of improvements resulted in a reduction in the number of work processes from 72 to 47. Thus, the lead time for process line machining oil separator decreased from 521 seconds/cycle to 444 seconds/ cycle with an increase in the total process cycle efficiency of 8.67%. In addition, the productivity of the previous average number of parts of 6575 pcs/day was increased to 7024 pcs / day and the manpower was reduced from five manpowers/day to three manpowers/day. Keywords: Process Cycle Efficiency, Re-layout, VALSAT, Value Stream Mapping
Perancangan Checking Fixture Sebagai Alat Inspeksi Komponen Underwing Tank Enclosure Pada Pesawat Fixed-Wing Kusuma, Samuel Surya; Hendaryanto, Ignatius Aris; Prayoga, Benidiktus Tulung; Winarno, Agustinus
Jurnal Teknik Mesin Indonesia Vol. 20 No. 1 (2025): Vol. 20 No. 1 (2025): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v20i1.884

Abstract

The underwing tank enclosure is a component of fixed-wing aircraft that was originally manufactured by a Spanish aerospace company, so all the tools and references were not available to the Indonesian aerospace company, one of which is the inspection process tool. This study aims to design a checking fixture to meet requirements and support the production process of the underwing tank enclosure component, ensuring efficient and compliant inspection processes for the Indonesian aerospace company. The research utilized CAD software to design the checking fixture and CAE software to analyze the structural strength of the main fixture frame using the Finite Element Method (FEM). The results include a checking fixture design employing checking pins to validate the dimensional contours of the underwing tank enclosure against specified geometric specifications. Structural strength analysis revealed a maximum Von Mises stress of 1,1119 MPa, a maximum deformation of 0,0074696 mm, and a minimum safety factor of 211,34, while the checking plate deformation analysis shows that the longitudinal checking plate component only experiences a maximum deformation of 0,0010525 mm, confirming that the main structural frame of the checking fixture and checking plate components are safe for use. Keywords: Design, Checking fixture, Inspection, FEM.
EVALUATION OF GEOMETRIC ERROR OF CUSTOMIZED CNC MILLING MACHINE TOOLS ACCORDING TO ISO 10791-7 Prayoga, Benidiktus Tulung; Hendaryanto, Ignatius Aris; Winarno, Agustinus
Jurnal Rekayasa Mesin Vol. 16 No. 1 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i1.1878

Abstract

Due to open technology, there exists an abundance of inexpensive information accessible for study. One such piece of information pertains to customization or do-it-yourself (DIY) CNC milling machines. However, customized milling machines often suffer from several limitations, including a lack of component dimension accuracy, inappropriate interaction between components, low rigidity, and control system problems, all of which can impact the cutting performance and accuracy of the workpieces. This study aimed to measure the extent of these impacts on the accuracy of the workpieces. The errors in customized CNC milling machines were identified using a ball-bar system and cutting tests conducted according to ISO standards. The results of this study concluded that improvements must be made to the interaction between machine components to reduce geometric errors to levels acceptable according to standards. This customized CNC milling shows promise for machining workpieces with an accuracy of ± 0.2 mm.
Co-Authors Benidiktus Tulung Prayoga Ignatius Aris Hendaryanto Kusuma, Samuel Surya Lasiyah, Sus Rasyid, Adji Nur Setiawan, Widia Sukidjo .