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Sumanto
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ANALISIS PENGARUH RADIUS BENDING PADA PROSES BENDING MENGGUNAKAN PELAT SPCC-SD TERHADAP PERUBAHAN STRUKTUR MIKRO Istianto Budhi Rahardja; Nana Rahdiana; Dodi Mulyadi; Sumanto; Abduh Al Afghani; Anwar Ilmar Ramadhan; Sukarman
Jurnal Teknik Mesin Mechanical Xplore Vol 1 No 1 (2020): Jurnal Teknik Mesin Mechanical Xplore
Publisher : Mechanical Engineering Department Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (743.682 KB) | DOI: 10.36805/jtmmx.v1i1.1279

Abstract

Paper ini membahas tentang pengaruh radius bending pada kualitas hasil bending dan pengaruhnya terhadap perubahan microstructure. Proses bending merupakan salah satu proses pembentukan logam (metal forming) dengan metode pembentukan dingin. Pada proses bending salah satu hal yang harus diperhatikan adalah penggunaan radius bending dan besarnya gaya yang diberikan. Penelitian ini menggunakan metode ekperimental dengan menggunakan material baja carbon rendah SPCC-SD dengan ketebalan 1.0 mm. Spesifikasi material SPCC-SD mengacu pada JIS-3141. Peneitian dilakukan pada proses bending dengan menggunakan mesin power press berkapasitas 40 ton pada proses pembuatan omega clamp 1.5 Inchi. Pengamatan difokuskan pada zona radius bending R 0.8 mm dan R 2.5 mm. Hasil pengujian mengkonfirmasi bahwa terjadi keretakan disekitar zona bending R 0.8 mm sedangkan pada zona radius bending R 2.5 mm tidak ditemukan. Penelitian ini juga mengkonfirmasi adanya perubahan microstructure pada penggunaan radius bending R 0.8 mm. Pada penggunaan zona bending R 0.8 mm telah dikonfirmasi terjadi perubahan menjadi butiran pearlite berdiameter 3.09 -6.97 µm. Sementara pada zona bending R 2.0 hanya terjadi perubahan pergeseran pearlite ke pusat bending dan tidak sampai terbentuk butiran pearlite. Kata kunci: Struktur micro, Pembentukan baja, Baja karbon rendah, Pearlit, Radius penekukan This paper study the influence of bending radius on bending results' quality and its effect on microstructure changes. The bending process is one of the metal forming types with the cold forming process. In the bending process, one thing to consider is using a bending radius, and a total force applied. This study used an experimental method using low-carbon steel material SPCC-SD with a thickness of 1.0 mm. SPCC-SD material specifications used according to JIS-3141. The research was carried out in the bending process using a 40-ton capacity power press machine for the 1.5-inch omega clamp manufacturing process. The investigation focused on bending radius zones. It found cracks around R 0.8 mm' bending zone while the R 2.5 mm bending radius zone not observed. The investigation confirmed the changes in the microstructure in the use of a 1.0 mm bending radius. Using the R 0.8 mm bending zone, confirmed that there changed size grain to 3.09 μm-6.97 μm diameter pearlite. While in the bending zone R 2.0, there was only a change in the pearlite shift to the bending center and without changed the pearlite grain. Keywords: Microstructure, Metal forming, Low-carbon steel, Pearlite, Bending radius
The Effect of V-Bending Parameters Utilizing Electrolytic Zinc-Coated Steel Sheet (SECC) Material Dodi Mulyadi; Khoirudin; Sukarman; Mohamad Rizkiyanto; Nana Rahdiana; Ade Suhara; Ahmad Fauzi; Sumanto
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa dan Inovasi Volume 5 Nomor 1 Tahun 2023
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v5i1.3937

Abstract

This study discusses the phenomenon of spring-back and spring-go in the bending kinematic forming using V-bending dies process and Electrolytic zinc-coated steel sheet (SECC/JIS G 3313) material. The zinc layer on the galvanized steel surface should not be damaged during the material forming process. The zinc layer on the galvanized steel sheet will affect the metal forming process. This study uses an experimental design with four input parameters, namely v-die opening L (mm), punch angle (degree), punch speed (mm/minutes), and bending force (kN). The smallest spring-back was obtained in the 4th test sample: the v-die opening of 35 mm, the punch angle of 40o, the punch speed of 30 mm/minute, and the bending force of 7.50 kN. The minor spring-back degree was 1.67o. Meanwhile, the smallest spring-go obtained in the second sample, namely the v-die opening of 30 mm, the punch angle of 50o, the punch speed of 40 mm/minute, and the bending force of 7.00 kN, the minor spring-go degree of 0.92o was obtained. These results show that the best spring-back degree for SECC/JIS G 3313 material is obtained when the bending process is performed with the v-die bending parameter of 30 mm, punch angle of 50o, punch speed of 40 mm/minute, and bending force of 7.00 kN.
Enhancement Material Removal Rate Optimization of Sinker EDM Process Parameters Using a Rectangular Graphite Electrode Sukarman; Sumanto; Acim Maulana; Dodi Mulyadi; Khoirudin; Siswanto; Ade Suhara; Safril
Jurnal Optimasi Sistem Industri Vol. 21 No. 2 (2022): Published in October 2022
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v21.n2.p87-96.2022

Abstract

This article discusses the optimization of sinker electrical discharge machining (sinker EDM) processes using SPHC material that has been hardened. The sinker EDM method is widely employed, for example, in the production of moulds, dies, and automotive and aeronautical components. There is neither contact nor a cutting force between the electrode and the work material in sinker EDM. The disadvantage of the sinker EDM is its low material removal rate. This work aims to optimize the material removal rate (MRR) using graphene electrodes in a rectangular configuration. The SPHC material was selected to determine the optimum MRR model of the sinker EDM input parameter. The Taguchi experimental design was chosen. The Taguchi technique used three input parameters and three experimental levels. Pulse current (I), spark on time (Ton), and gap voltage were among the input parameters (Vg). The graphite rectangle was chosen as an electrode material. The input parameter effect was evaluated by S/N ratio analysis. The result showed that pulse current has the most significant impact on material removal rate in the initial study, followed by spark on time and gap voltage. All input parameters are directly proportional to the MRR. For optimal material removal rate, the third level of pulse current, spark on time, and gap voltage must be maintained. In addition, the proposed Taguchi optimization model could be applied to an existing workshop floor as a simple and practical electronic tool for predicting wear and future research.
Co-Authors Abduh Al Afghani Acim Maulana Ade Suhara Ahmad Fauzi Anwar Ilmar Ramadhan Dodi Mulyadi Istianto Budhi Rahardja Khoirudin Mohamad Rizkiyanto Nana Rahdiana Safril Siswanto Sukarman Sukarman Sukarman