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All Journal Manutech : Jurnal Teknologi Manufaktur Prosiding Seminar Nasional Inovasi Teknologi Terapan Jurnal Inovasi Teknologi Terapan
Yuli Dharta
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Agriculture, Biological Sciences & Forestry Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Journal : Prosiding Seminar Nasional Inovasi Teknologi Terapan

 1 
PENGARUH VARIASI ARUS BUSUR LISTRIK PENGELASAN GMAW TERHADAP KEKUATAN IMPAK PADA BAJA KARBON RENDAH ST 37 Bilal Nur Ikhsan; Rodika Rodika; Yuli Dharta
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 1 (2021): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

The welding procedure looks very simple but in practice there are many problems that must be overcome where in repairing it requires various kinds of knowledge, electric arc current and welding defects greatly affect the strength of the weld joint. he conducted a study to determine the effect of electric arc current on low carbon steel St 37 on impact strength. The test method was carried out by the charpy method using five (5) variations of amperemeter 160,180,200,220,240 with plate dimensions: 200mm×100mm×10mm and using a single V seam, with a welding position of 1G (groove). GMAW welding method. specimen dimensions 55mm,×10mm,×10mm,. So it can be concluded that the lower the electric arc current, the higher the impact price, and vice versa, the higher the arc current, the lower the impact value. The results of the highest impact value on an electric arc current of 160 from the Capping weld with a value of 0.92778 (Joule/mm²), and the smallest value is found in the result of the Root Pass weld on an electric arc current of 240 with a value of 0.09875 (Joule/mm²) .
ANALISIS UJI BENDING PADA PENGELASAN BAJA ST37 MENGGUNAKAN LAS SMAW (SHIELD METAL ARC WELDING) DENGAN POSISI PENGELASAN 1G Rahmat Maulid; Tuparjono Tuparjono; yuli Dharta
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 01 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

The welding process is the process of joining two or more metal materials in one unit in the presence of heat energy, the heat energy generated from the welding process can affect the results of the weld. In this study, the parameters used are variations in welding current and the number of layers and passes, the welding current used is 65A penetration, 95A fill-capping, 65A penetration, 115A fill-capping, 65A penetration, 125A fill-capping and the number of layers and passes required. used are 4 layer 7 pass and 4 layer 9 pass with DCEP (Direct Current Electrode Positive) polarity. In this study, a bending test analysis was carried out on ST37 steel welding using SMAW (Shield Metal Arc Welding) welding with a welding position of 1G. The purpose of this study was to determine the compressive strength of ST37 steel after the SMAW welding process with bending testing. The method used in the bending test uses the three point bending method. From the results of the bending test, the highest compressive load strength occurred at a welding current of 65A penetration, 125A fill-capping with 4 layers 7 passes, with a suppression load of 75.8kg.
PENGARUH FRAKSI VOLUME DAN VARIASI PERENDAMAN NaOH TERHADAP KEKUATAN TARIK DAN IMPAK KOMPOSIT BERPENGUAT SERAT AMPAS TEBU Aden Sanjaya; Juanda Juanda; yuli Dharta
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 01 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

This study aims to determine the effect of the duration of immersion of NaOH and the optimal volume fraction of bagasse fiber on tensile strength and impact strength by using Polyester Resin using hand lay-up composite molding method. The object of research is bagasse fiber composites with variations in NaOH immersion and volume fraction. The highest tensile strength in the composite fiber immersion variation for 2 hours with a volume fraction of 15% is 22.3 MPa. Meanwhile, for tilapia the highest impact strength was in the 2-hour fiber immersion variation with 5% bagasse fiber volume fraction of 0.272 J/mm². Meanwhile, the lowest tensile strength is found in the 5% volume fraction, which is 12.8 MPa. And for the lowest strength impact test value in the 15% fraction, which is 0.0113 J/mm².
PENGARUH VARIASI ARAH SERAT DAN FRAKSI VOLUME SERAT PANDAN DURI TERHADAP KEKUATAN TARIK DAN IMPAK SEBAGAI MATERIAL ALTERNATIF HELM SNI Aditya Rachman; Juanda Juanda; yuli Dharta
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 2 No. 01 (2022): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

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Abstract

Pandan thorn with the term (Pandanus tectorius) is a bush plant with climbing stems and has a height of 11 m. This research was conducted to obtain data on the tensile strength and impact strength of pandan thorn fiber with variations in fiber direction and volume fraction. This research is expected to be useful for SNI helmet materials. The maximum value of tensile strength is 41.33 MPa in the vertical fiber direction and the fiber volume fraction is 12.5%. While the lowest tensile strength value is 8.44 MPa using horizontal fiber direction with a fiber volume fraction of 7.5%. The largest impact strength is 0.0616 J/mm2 in the vertical direction of fiber with a fiber volume fraction of 12.5% and the smallest impact strength is 0.0216 J/mm2 in the horizontal fiber direction with a fiber volume fraction of 7.5%. In this test, compared with the results of the tensile and impact strength testing of SNI helmets of 33.93 MPa and 0.00972 J/mm2, the specimens passed the material test for SNI helmets.
Co-Authors Aden Sanjaya Adhe Anggry Aditya Rachman Andri Wiguna Ariyanto Ariyanto Armada Armada Bilal Nur Ikhsan Husman Husman Indra Dwi Saputra Juanda Juanda Masdani Masdani Rahmat Maulid Ririn Martasari Rodika, Rodika Sateria, Angga Sultan Chandra Kusuma Tuparjono, Tuparjono Yuliyanto Yuliyanto