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All Journal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
P.D. Setyawan
Mataram University
Aerospace Engineering Automotive Engineering Mechanical Engineering Physics

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Pengaruh laju pemanasan dan variasi komposisi limbah paduan aluminium dengan Fly Ash Batubara terhadap kekerasan dan kekuatan tekan produk metalurgi serbuk A.A.A. Triadi; P.D. Setyawan; I.K. Kurniawan
Dinamika Teknik Mesin Vol 13, No 2 (2023): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v13i2.682

Abstract

In this study, the manufacture of composites using the powder metallurgical method used two research variables, namely the rate of heating with variations in temperature with an increase of 3°C/minute, 5°C/minute and an increase of 7°C/minute.  The second variable is the mixing composition with variations in aluminium composition: Fly Ash is 100%:0%, 85%:15%, 80%:20% and 75%:25%.  The highest hardness results in this study were found in the 15% fly ash composition with a heating rate of 3°C/minute where the hardness value was 66.17 HRF while the lowest hardness value was found in the 0% fly ash composition with a heating rate.  of 7°C/min with a hardness value of 34.84 HRF.  For compressive strength test results.  the highest value was obtained in the 15% Fly Ash composition with a heating rate of 3°C/minute where the compressive strength value was 106.78 MPa, while the lowest compressive strength value was in the 0% fly ash composition with a heating speed of 7°C minutes where the value was 42.71 MPa.  From the hardness and compressive strength value, it can be concluded that the smaller the heating rate, the higher the hardness and compressive strength and the greater the SC mixing composition, the higher the hardness and compressive strength.
Kaizen implementation to reduce dimensional defect in the welding process of Fender D155A-6R at PT Arkha Jayanti Persada I.G.B.E.P. Yana; P.D. Setyawan; I.M. Suartika; A. Rachmalia; M.M. Aziz
Dinamika Teknik Mesin Vol 15, No 2 (2025): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v15i2.1158

Abstract

Kaizen is a concept of continuous improvement that emphasizes quality enhancement and efficiency in production processes. In this study, the Kaizen approach was applied to address dimensional defects in the welding process of the Fender D155A-6R component at PT. Arkha Jayanti Persada. The component, which was previously imported from Japan, is currently being tested through local production trials. Initial inspection indicated that 11 of 33 measurement points were out of tolerance, most of which were linked to welding activities. To analyze the problem, the PDCA (Plan, Do, Check, Act) cycle was employed. The investigation revealed several contributing factors: the absence of a locator to secure parts during welding, insufficient reinforcement that caused deformation, and the lack of a standardized welding procedure for operators. Corrective measures were then introduced, including the installation of a locator, additional reinforcements, and the establishment of a formal welding procedure. After two PDCA cycles, the dimensional issues were successfully resolved. The findings indicate that applying Kaizen through PDCA led to significant improvements in dimensional accuracy and product quality.
Co-Authors A. Rachmalia A.A.A. Triadi I.G.B.E.P. Yana I.K. Kurniawan I.M. Suartika M.M. Aziz