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All Journal Jurnal Surya Teknika Jurnal Inovasi Teknologi Manufaktur, Energi dan Otomotif
Abriandika, Venusa
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Pemanfaatan Komposit Serat Bambu Jepang (Dracena Surculosa) dengan Penamban Material Powder Siregar, Ansor Salim; Ineza Putri, Sunny; Maulana, Indra; Abriandika, Venusa
JURNAL SURYA TEKNIKA Vol. 12 No. 1 (2025): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v12i1.9536

Abstract

The development of natural composites offers solutions to various material challenges, with bamboo being widely utilized as a reinforcement due to its economic value. This research investigates the influence of material mixture parameters by incorporating Japanese bamboo fibers as reinforcement, along with aluminum powder, silicon dioxide powder, fluorocarbon powder, and epoxy hardener. Bamboo fibers were extracted using a chemical method involving 5% NaOH at 70°C for varying durations. Composites were fabricated with different fiber volume fractions (26%, 32%, 38%). Impact tests on the composite materials revealed a maximum impact strength of 1.13 J/mm² with an absorbed energy of 152 Joules. The highest dd strength, 118.30 N/mm², was observed in composites with 26% fiber volume fraction. Hardness tests yielded a maximum value of 681.4 HLB for the 26% fiber variation while bending tests showed a peak result of 9.37 N/mm for the 32% fiber variation. Conversely, the water absorption test indicated the lowest absorption value of 0.56% in the 38% fiber variation.
Analisis Komparatif Efektivitas Pahat Variable Helix Angle (VHA) dan Normal Helix Angle (NHA) untuk Pengendalian Regenerative Chatter pada Pemesinan CNC Milling Stainless Steel 304 Abriandika, Venusa; Siregar, Ansor Salim; Hanafi , Agung Fauzi; Saputra, Indra Adi
Jurnal Inovasi Teknologi Manufaktur, Energi dan Otomotif Vol. 4 No. 1 (2025): Jurnal Inovasi Teknologi Manufaktur, Energi, dan Otomotif
Publisher : Politeknik Negeri Banyuwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57203/jinggo.v4i2.2026.%p

Abstract

This study compares the effectiveness of Variable Helix Angle (VHA) and Normal Helix Angle (NHA) end mills in controlling regenerative chatter during CNC milling of stainless steel 304. Experiments were conducted across a range of cutting parameters, including cutting speed, feed per tooth, and axial depth of cut, using VHA and NHA tools with identical basic geometries except for the helix angle. Measurements were obtained for vibration signals using an accelerometer, machined surface roughness (Ra), and tool wear. Signal analyses, including Fast Fourier Transform (FFT) and Power Spectral Density (PSD), experimental construction of stability lobe diagrams, and statistical evaluation using ANOVA, were employed to assess the influence of helix angle on stability limits and surface quality. The results are expected to determine whether VHA tools offer significant improvements in chatter suppression and expand the stable cutting region compared to NHA tools, as well as their implications for productivity and tool life when machining SS304. The findings provide practical recommendations for selecting cutter geometry in industrial applications where regenerative chatter poses a critical challenge.
Co-Authors Hanafi , Agung Fauzi Indra Maulana, Indra Saputra, Indra Adi Siregar, Ansor Salim Sunny Ineza Putri