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All Journal Manutech : Jurnal Teknologi Manufaktur ARMATUR : Artikel Teknik Mesin dan Manufaktur JAMU : Jurnal Abdi Masyarakat UMUS Prosiding Seminar Nasional Inovasi Teknologi Terapan Jurnal Inovasi Teknologi Terapan Jurnal Polimesin
Ramli Ramli
Teknik Mesin, Fakultas Teknik, Politeknik Manufaktur Negeri Bangka Belitung
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Pengaruh Secondary Aging Treatment Terhadap Sifat Mekanik Dan Surface Glossiness Pada Aluminium Paduan 7003 Ramli Ramli
Manutech : Jurnal Teknologi Manufaktur Vol. 9 No. 01 (2017): Manutech : Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (700.292 KB) | DOI: 10.33504/manutech.v9i01.33

Abstract

As technology advances and the quality of life improves, there is a deep need that requires of aluminium alloy that bears high strength, high toughness, high surface glossiness, anti-corrosion, and high fatigue resistivity [2]. This study aims to investigate the effects of secondary aging treatment on the mechanical properties and Surface Glossiness of the 7003 aluminium alloy by using several equipment, including: confocal laser microscope, white light interferometer, gloss meter, micro Vickers hardness tester and tensile test machine. This research was conducted by experimental method by giving treatment on the aluminium alloy 7003 with some treatments, there are: aging treatment at 100?C for 5 hours and then secondary aging treatment at several different temperatures at 150?C, 175?C and 200?C for 9 hours respectively. Based on our experimental results, it obtained: After being aged at 100 ? for 5 hours and then secondary aged at 175? for 9 hours, the 7003 aluminium alloy obtained excellent mechanical properties, which can achieve the industrial requirements of Yield strength 320 MPa and Elongation 13% for 3C mobile phone products. The 7003 aluminium alloy after being anodizing treated could obtain excellent Surface Glossiness and oxidation layer. The present aluminium alloy can achieve Surface Glossiness better than 1200 GU and the thickness of oxidation layer exceed 10?m, which were suitable for 3C industrial applications.
Peningkatan Literasi Keuangan untuk Pekerja Migran di Taiwan Agung Dharmawan Buchdadi; Destria Kurnianti; Dewi Susita; Ramli Ramli; Amelia Sholeha
JAMU : Jurnal Abdi Masyarakat UMUS Vol. 2 No. 02 (2022): Februari
Publisher : LPPM Universitas Muhadi Setiabudi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.899 KB) | DOI: 10.46772/jamu.v2i02.672

Abstract

Kemampuan manajemen keuangan dalam hal perencanaan keuangan menjadi salah satu kemampuan yang wajib dimiliki oleh para buruh migran yang bekerja di luar negeri dengan meningkatkan literasi keuangan mereka. Sebab dengan kemampuan manajemen keuangan yang baik dapat melakukan perencanaan keuangan yang efektif, efisien, dan bermanfaat, sehingga para buruh migran diharapkan dapat meningkatkan tingkat kesejahteraannya saat kembali ke tanah air memiliki modal yang cukup selama merantau di luar negeri. Kegiatan pengabdian kepada masyarakat ini dilakukan dengan tujuan agar para pekerja migran di Taiwan memiliki pengetahuan literasi keuangan yang baik. Kegiatan pengabdian kepada masyarakat ini menggunakan metode pemaparan materi, diskusi dan tanya jawab. Hasil dari kegiatan ini adalah para pekerja migran dapat melakukan perencanaan keuangan rumah tangga. Dengan memiliki literasi keuangan yang baik, masyarakat Indonesia diharapkan menjadi lebih maju, sehat, dan sejahtera khususnya pekerja migran di Taiwan.
Analisis Pengaruh Pengujian Tekan Terhadap Suhu, Pengeringan Awal, Suhu dan lama Penahanan Waktu Pemanasan Bata Merah Yuliyanto Yuliyanto; Eko Yudo; Ramli Ramli
Manutech : Jurnal Teknologi Manufaktur Vol. 15 No. 01 (2023): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v15i01.142

Abstract

Red brick is a very important building material in building construction. Red brick has a rectangular physical shape with a distinctive color, namely red. Red bricks are made of clay mixed with sand and water, then mixed evenly and molded as desired. According to the quality standards, red brick is said to be of good quality and quality if it has several criteria including having the required size, compressive strength, and water absorption capacity. This research was conducted to see the effect of the length of drying time after printing, the effect of heating time, heating temperature, and the surface topography of red brick. The data processing method uses the Response Surface (RSM) method using Design Expert 09 software. The results show the smallest compressive test value of 131.4 kg/cm2. The biggest value is 148 kg/cm2. The most significant influence on the red brick making process is the drying time. The longer the drying process will cause the water content in the red brick to decrease. The SEM results show that the effect of drying red bricks that experience longer drying will coalesce and crystallize more easily. Based on the analysis of the results of the study that a longer drying time will cause an increase in compressive strength.
Efek Fraksi Volume Dan Panjang Serat Terhadap Pengujian Tarik Dan Impak Menggunakan Serat Daun Nanas Smooth Cayenne Yuliyanto, Yuliyanto; Ramli, Ramli; Ventani, Embun
Manutech : Jurnal Teknologi Manufaktur Vol. 15 No. 02 (2023): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/manutech.v15i02.265

Abstract

Bangka Belitung is one of the provinces with the largest pineapple production in Sumatra, but the pineapple leaves have not been processed and are still considered waste. Currently, the use of pineapple trees is only for the fruit. Even though pineapple leaves have very strong fiber and can be used as a composite of natural fibers. Composites reinforced with natural fibers have excellent corrosion resistance properties, as well as lower production costs, and are considered more environmentally friendly. The research objective was to obtain the highest tensile and impact testing values ??for volume fractions of 15%, 20%, 25%, 30%, and 35% with 5% NaOH alkaline treatment for 2 hours. Making samples using the hand lay-up method. The analysis was carried out using the direct experimental design method, in which the effect of the ratio of the volume fraction of the fiber after immersion in 5% NaOH for 2 hours on the tensile strength and impact strength would be seen. The result is the highest tensile strength of 52.6 MPa at 25% fiber volume fraction and a decrease in tensile strength at 30% and 35% volume fraction. The lowest tensile strength was at 35% volume fraction with a tensile test strength value of 24.7 Mpa, while the highest impact test results were 26.5 kj/m² at 30% volume fraction, while the lowest impact strength was 11 kj/m². This is because more and more distribution of fiber in the resin in each composite will strengthen the bond between the matrix and the fiber which causes the composite to be sturdy and not brittle, but if the fiber is above 30% it will result in a decrease in strength due to imperfect bonding of the resin and fiber. Vice versa, a few fibers will make the reinforcing bond unbalanced and tend to decrease its strength. For fiber test results above 20%, it can be used as a new composite material for making helmets according to SNI standards.
Pengaruh Suhu, Waktu dan Ukuran Aktivasi Fisika Limbah Cangkang Kerang Darah (Anadara granosa) Terhadap Perubahan pH air Di Polman Babel Gunawan, Herri; Subhan, Muhammad; Barmawai, Ramli; Ary Wahyudie, Ilham
Jurnal Inovasi Teknologi Terapan Vol. 2 No. 2 (2024): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v2i2.157

Abstract

The increase in the amount of blood clam (Anadara granosa) production of 445.13 tonnes per year resulted in an increase in the potential for solid waste from their processing. This study utilizes waste from blood clams as a material for making adsorbents because the shells of these clams contain high CaCO3. The manufacture of adsorbents in this study uses physical activation intending to expand the surface in influencing the pH value of water in Polman Babel. The research method used in this research is Response Surface Methodology (RSM). The experimental design used in this research is the Box-Behnken design with 3 factors. The variables used in this study are temperature, time, and size. The temperatures used are 500℃, 600℃, and 700℃. The time used is 120 minutes, 240 minutes, and 360 minutes. The sizes used are 100 mesh, 150 mesh, and 200 mesh. The results in this study show that the optimal value of pH is found at a temperature of 345 ℃, a time of 6.4 minutes, and a size of 130.67. The resulting response of the second-order equation is convex with the optimal point at the maximum point. Based on the results of the research analysis shows that the influential independent variable is size.
Pemanfaatan Limbah Cangkang Kerang Kijing (Pilsbryoconcha Exilis) Sebagai Katalisatator Pada Proses Carburizing Hakim, Lukman; Ramli, Ramli; Sugiyarto, Sugiyarto
Jurnal Inovasi Teknologi Terapan Vol. 2 No. 2 (2024): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v2i2.182

Abstract

Indonesia's natural products are very rich, including containing several types of animals, one of which is a clam that belongs to one type of shellfish. Mussel shells contain 39.55% calcium carbonate (CaCO3). The presence of calcium carbonate in the shell makes it possible to use it as a source of catalyst in the carburization process. Carburization adds carbon to the steel when heated to austenitic temperatures, causing the carbon to diffuse onto the steel surface. Low carbon steels with a carbon content of less than 0.3% are usually used in this process. Among the low-carbon steels widely used in industry, there is St 42 Steel, which has exceptional strength. Coconut shell charcoal is used as a catalyst. Coconut shell charcoal is one of the active carbon materials. Activated charcoal from coconut shell has low ash content, high reactivity and good solubility in water. The research method used is experimental. Steel ST 42 is used as the material. At the same time, the carburizing medium is activated carbon powder from coconut shell and shellfish powder by 10%, 20% and 30%, respectively, when heated for 3.6 and 9 hours.
Pemanfaatan Limbah Cangkang Kerang Kepah (Polymesoda Erosa ) Sebagai Katalisator Pada Proses Carburizing Yuhardin, Yuhardin; Ramli, Ramli; Sugiyarto, Sugiyarto
Jurnal Inovasi Teknologi Terapan Vol. 2 No. 2 (2024): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v2i2.183

Abstract

In general, the shells are widely used as handicraft materials such as wall decorations or building interior decorations and as a mixture of animal feed, therefore other utilization is needed to increase the use value of the shells. Clam shells contain calcium in the form of calcium carbonate (CaCO3) by 96.5%. The high calcium content of the shell allows the shell to be used as a source of catalyst material in the carburizing process. The catalyst affects the carburizing process because it can accelerate the formation of CO2 gas, which is needed for the carbon diffusion process on the surface of low carbon steel so that the metal hardness can increase. The powder mixing process was carried out for 3, 6, 9 hours with the variations used, namely 0%, 10%, 20%, 30% to determine the effect of the percentage of mussel shell powder catalyst and carburizing process time on the hardness value and impact strength of ST 42 steel.
Pemanfaatan Limbah Cangkang Kerang Simping (Amusium Pleuronectes) Sebagai Katalisator Pada Proses Carburizing Muhamad Juniardi; Ramli, Ramli; Zulfitriyanto, Zulfitriyanto
Jurnal Inovasi Teknologi Terapan Vol. 2 No. 1 (2024): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v2i1.188

Abstract

Simping clam’s a type of waste that is rarely used. The high levels of calcium carbonate in simping shells enable them to be used as a catalyst in the carburizing process. This research aimed to determine the effect of simping clam shell powder as a catalyst in the carburizing process on the hardness and impact strength values of ST 42 steel. This research used an experimental method by varying the percentage of simping clam shell powder: 0%, 10%, 20%, 30%, and coconut shell activated charcoal powder: 100%, 90%, 80%, and 70%, against ST 42 steel with variations in carburizing time: 3 hours, 6 hours, and 9 hours using a temperature of 900°C. The tests carried out were rockwell hardness tests and charpy impact tests according to ASTM E23 standards. From the test results, it was obtained that good hardness and impact strength values were obtained in 3 hours, the percentage was 30% with an average hardness value of 34.02 HRC and an impact value of 0.279 joules/mm2, in 6 hours the percentage was 30% with an average hardness value of 38. 92 HRC and an impact value of 0.229 joules/mm2, a time of 9 hours with a percentage of 30% an average hardness value of 43.68 HRC and an impact value of 0.179 joules/mm2. So by increasing the carburizing time, the hardness increases. The longer the carburizing time, the higher the percentage of simping clam shell powder used. This means that simping clam shell powder  functions as a catalyst.
Pemanfaatan Limbah Cangkang Kerang Dara (Andara Granosa) Sebagai Alternatif Katalisator Pada Proses Carburizing Anshari, Satria; Ramli, Ramli; Sugiyarto, Sugiyarto
Jurnal Inovasi Teknologi Terapan Vol. 2 No. 2 (2024): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v2i2.189

Abstract

Along with the rapid advancement of technology, the utilization of steel in the industrial world is increasing. St 42 carbon steel is a type of low alloy carbon steel, so this steel has a relatively low hardness and soft properties but has a high ductility value. It is necessary to improve its mechanical properties such as hardness. Improvement of these properties requires the park carburizing process. The purpose of this research is to determine the feasibility of turtle shell powder as a catalyst and coconut shell activated charcoal powder as a carbon source in the carburizing process of St 42 steel. The research method includes turtle shell powder with variations of 0%, 10%, 20%, and 30%, then followed by a rapid cooling process using water media. From the test results, it can be seen that the mechanical properties of the highest hardness value are found in the 20% variation of the turtle shell catalyst with a time of 9 hours experiencing an increase, inversely proportional to the hardness. impact test value with a 20% variation of the catalyst with a time of 9 hours decreased. So it can be concluded that the high hardness value will be inversely proportional to the results of the low impact test value.
PERBAIKAN SISTEM PENGULIRAN PADA MESIN BUBUT DoALL LT 13 DI BENGKEL MEKANIK POLMAN BABEL Yudha Pirmansyah, Sandika; Pratama , Jhasua; Ramli, Ramli; Pristiansyah, Pristiansyah
Prosiding Seminar Nasional Inovasi Teknologi Terapan Vol. 5 (2025): Prosiding Seminar Nasional Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The automatic threading system (half‑nut lever) on the DoALL LT‑13 lathe at Polman Babel's mechanical workshop failed to operate, disabling thread-cutting capability. This research aimed to document the repair process and post-repair functionality tests. The methods included 5 Why analysis, apron disassembly, cleaning, gear-idler clearance adjustment, gear surface lapping, and re-calibration of the half‑nut lever. Tests included functional check, dimensional accuracy, and thread cutting on three specimens: M27×3, M20×2.5, and M18×2.5. Results showed normal operation and all threads met ISO tolerance. The lathe is now functional for educational and light machining purposes.
Co-Authors Abda Abda Achmad Rusdy Afrizal, Ragil Agung Dharmawan Buchdadi Amelia Sholeha Anshari, Satria Aswin, Fajar Destria Kurnianti Dewi Susita Eko Yudo Farera, Alfathir Febrianto, Muhammad Yori Ferzy Ersandy Gunawan, Herri Hafiz Fadhil Hasdiansah, Hasdiansah Herianto Herianto Ilham Ary Wahyudie Irfan Maulana, Irfan Lukman Hakim Meriatun, Meriatun Muhamad Aris Muhamad Juniardi MUHAMMAD SUBHAN Pratama , Jhasua Pristiansyah, Pristiansyah Sugianto Sugianto Sugiyarto Sugiyarto Ventani, Embun Wardiyah, Atikah Araminta Wibowo, Kasih Yudha Pirmansyah, Sandika Yuhardin, Yuhardin Yuliyanto Yuliyanto Yuliyanto Zulfitriyanto, Zulfitriyanto