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All Journal Rekayasa Mesin Turbo : Jurnal Program Studi Teknik Mesin
Agustinus Deka Betan
Jurusan Teknik Mesin Fakultas Teknik Universitas Brawijaya
Mechanical Engineering

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Pengaruh Persentase Alkali pada Serat Pangkal Pelepah Daun Pinang (Areca Catechu) terhadap Sifat Mekanis Komposit Polimer Betan, Agustinus Deka; Soenoko, Rudy; Sonief, Achmad As´ad
Rekayasa Mesin Vol 5, No 2 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (364.15 KB)

Abstract

The community of NTT has used betel tree (Areca Catechu), especially for its base of betel leaf, as a burning material for cooking, as a rope to tie the house roof made from bamboo, and as a device to peel traditional candlenut. Economic value of betel is not high, therefore, the fiber of betel tree as a material to empower the polymer matrix composite was need to be optimized. Betel fiber-based composite is expected to be used as the substitute of concrete brick, red brick, triplex, and cloth hanger because of the favorable mechanical characteristics such as strong, light, environmental friendly, resistant to bending, resistant to water, resistant to heat, and economic. Natural fiber-based composite, especially which is made from betel fiber, has low strength so that chemical treatment is needed. NaOH (alkali) was commonly used as chemical. In this study NaOH is given at different percentage for each fiber. The selected percentages in this experiment are 4%, 5% and 6% NaOH. Result of experiment shows that the highest tensile strength of fiber is found at 5 % NaOH which rates for 195 MPa.Keywords: Areca Catechu, Alkali Percentages, Mechanical Properties
The Effect of Chisel Sharpening and Without Chisel Sharpening on the Surface Roughness of the Piston Waste Casting Material Betan, Agustinus Deka
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2545

Abstract

This research begins with the casting process of motorcycle piston waste and then continues with the turning process on conventional lathes. The purpose of this machining process is to identify the quality of the surface roughness of the turned casting product. The surface roughness quality of the turning product to be applied must show high precision and not experience significant surface defects. To get the surface quality, there are many machining variables that need to be considered, one of which is the use of lathe chisels. The turning tool becomes an important component during the turning process to form various forms of products produced through the mediation of rotary motion and tool motion resulting in large and small friction. This friction that occurs will depend on the sharpness of the chisel itself. The problem studied is the use of sharpened and non-sharpened chisels in terms of product surface roughness during the turning process. In addition, this study will vary the variable thickness of the feed which varies 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm to be a factor in finding out the quality of turning products. While the spindle rotation of the lathe used is 240 rpm, 350 rpm, 430 rpm. From the experiments on turning the casting product, it was found that the lowest surface roughness quality was obtained with the N6 sharpened chisel of 1.13 mm while the N6 unsharpened chisel was 1.19 mm.Keywords: lathe chisel, casting, piston waste, turning, surface roughness value.
Co-Authors Rudy Soenoko Sonief, Achmad As´ad