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All Journal R.E.M (Rekyasa Energi Manufaktur) Jurnal Jurnal Polimesin
Sunardi Tjandra
University of Surabaya
Automotive Engineering Control & Systems Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Perancangan Mekanisme Pelurusan Kawat SAE 304 (UNS S30400) Galvanized Menggunakan Prinsip Pengerolan Herman Susanto; Sunardi Tjandra
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 5 No 2 (2020): Desember 2020
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v5i2.939

Abstract

Wire is a complement material on the manufacturing product. Therefore, the wire processes usually bestowed to the middle-low industry. Cutting and straightening wire processes are the most basic process for wire materials. In the middle-small industry, demand of wire materials is 150 kg per day. Seeing this potential, the design of a wire straightening mechanism for middle-low industries is necessary to maximize productivity. The main purpose of wire straightening mechanism design is calculating roll diameters and placement to obtain appropriate rolling force. In designing this wire straightening mechanism, the raw materials are used 3 mm SAE 304 (UNS S30400) Galvanized. The rolling method used in this mechanism is Three-Roll Bending. The empirical method is used on this analysis. Based on the analytical results, roll used on this mechanism are 5 pieces or equal with 3 cycle of rolling process with 40 mm of diameters. The vertical gap between center of rolls is 41.5 mm with 54 mm horizontal gap. Rolling force produced by the analytical roll dimension is 1608.69 N/cycle and that’s enough to give plastic deformation on the 3 mm SAE 304 (UNS S30400) Galvanized wire.
The Influence of Annealing Temperature and Holding Time Near Glass Transition Temperature on the Tensile Strength of Fused Deposition Modeling Printed Polylactic Acid Michael Evan; The Jaya Suteja; Sunardi Tjandra
Jurnal POLIMESIN Vol 21, No 1 (2023): February
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i1.3386

Abstract

Thermal annealing can be implemented to improve the mechanical strength of a 3D printing object. The critical parameters of thermal annealing are temperature and holding time. Based on the literature review, the implemented annealing temperature affects the required holding time. As the use of a lower annealing temperature and holding time can reduce the required heat and increase the process efficiency, this research investigates the implementation of the annealing temperature near glass transition temperature with a short holding time. The aim of this research is to investigate the influence of the thermal annealing temperature range from 65 °C to 85 °C and the holding time from 45 minutes to 75 minutes on the Ultimate Tensile Strength of a Polylactic Acid part printed by using Fused Deposition Modelling. The experiment implemented a 32-factorial design methodology with two replications. The experiment results indicate that the thermal annealing slightly exceeding glass transition temperature facilitates higher interlayer diffusion of raster and layers and consequently increases the Ultimate Tensile Strength. Meanwhile, the holding time does not influence the Ultimate Tensile Strength of the annealed part as the holding time range cannot accomplish the maximum crystallization for the annealing temperature range between 65 °C to 85 °C.
Co-Authors Herman Susanto Michael Evan The Jaya Suteja