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All Journal Prosiding Semnastek Manutech : Jurnal Teknologi Manufaktur Sprocket : Journal of Mechanical Engineering Dulang: Jurnal Pengabdian Kepada Masyarakat Prosiding Seminar Nasional Inovasi Teknologi Terapan Jurnal Inovasi Teknologi Terapan
Somawardi Somawardi
Politeknik Manufaktur Babel
Agriculture, Biological Sciences & Forestry Automotive Engineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Analisis Pengaruh Media Pendingin Dengan Kombinasi Waktu Penahanan Pendingin Terhadap Nilai Kekerasan Baja AISI-1045 Pada Proses Quenching ERVAN AGUSTIAN; Somawardi; Sugianto
Manutech : Jurnal Teknologi Manufaktur Vol. 13 No. 01 (2021): Manutech: Jurnal Teknologi Manufaktur
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (211.237 KB) | DOI: 10.33504/manutech.v13i01.169

Abstract

AISI-1045 steel has a hardness of 7,167 HRC without treatment. The hardness of this steel can be increased through the hardening process with rapid cooling. This study aims to determine the optimum hardness value and how the effect of cooling media (brine, water, and oil) with a combination of coolant holding time (5, 10, and 15 minutes) which received quenching heat treatment against the hardness of AISI-1045 carbon steel. The heating process is carried out at a temperature of 900º C using an electric oven. This study used AISI-1045 steel with a diameter of 25 mm and a length of 25 mm. Tests carried out using a Universal Hardness Tester (Rockwell). The hardness is influenced by the type of cooling medium and the holding time of the coolant. Based on the fast cooling carried out from the three media with variations in the cooling holding time, it produces varying levels of hardness. From the heat treatment that has been done, the highest hardness value is in the brine medium with a coolant holding time of 15 minutes (G15) with an average value of 53,283 HRC. And the lowest hardness value is the oil medium with a coolant holding time of 5 minutes (O5) with an average value of 21,583 HRC.
SINERGISME KONSENTRASI NACL DAN UKURAN PARTIKEL TERHADAP KOROSI EROSI PADA BAJA KARBON RENDAH Somawardi Somawardi
Prosiding Semnastek PROSIDING SEMNASTEK 2014
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Korosi  erosi  merupakan  salah  satu  kerusakan  yang  sering  terjadi  pada  sistem  perpipaan  akibatadanya  pergerakan  relatif  fluida  korosif  dengan  permukaan  logam.  Konsentrasi  NaCl  sangatmempengaruhi  laju  korosi  pada  suatu  material.  Kecepatan  fluida  yang  relatif  tinggi  danmengandung  partikel  akan  menyebabkan  erosi,  dan  kecepatan  fluida  yang  relatif  lambat  akanmenimbulkan  korosi  saja.  Hanya  pada  kecepatan  tertentu  (kecepatan  kritis)  korosi  erosi  dapatterjadi.    Laju  kerusakan  yang  diakibatkan  oleh  sinergi  antar a  korosi  dan  erosi  lebih  besardibandingkan  dengan  kerusakan  oleh  korosi  saja  atau  erosi  saja.  Kerusakan  permukaan  hasilpengujian  diamati  dengan  kamera  makro  dan  mikroskop  stereo.  Cross  section  diamati  denganmikroskop  optik  Kontur  permukaan  diukur  dengan dial  gauge.  Distribusi  tegangan  geser  padapermukaan  spesimen  disimulasikan  dengan Computational  Fluid  Dynamics  (CFD).  Hasilpengujian  mengindikasikan konsentrasi  NaCl  3.5%  memiliki  kelarutan  oksigen  yang  optimaldibandingkan  dengan  konsentrasi  NaCl  5%,  kelarutan  oksigen  yang  optimal  ini  mengakibatkanproses terjadinya autokatalitik oleh ion Cl- menjadi optimal. Kondisi kerusakan permukaan bendakerja  pada  pengujian  dengan  konsentrasi  NaCl  3.5  %  lebih  dominan  dibandingkan  dengankonsentrasi  NaCl  5%. Pengujian  menggunakan  partikel  lebih  besar  akan  mengakibatkanpeningkatan weight loss. Hal ini disebabkan partikel yang lebih besar memiliki inersia yang lebihbesar sehingga mengalami hambatan yang lebih kecil pada saat sebelum terjadi impak.Peristiwa inimenyebabkan  efesiensi  benturan  (collision  effeciency)  tetap  tinggi.  Efisiensi  benturan  yang  yangbesar akan menghasilkan energi kinetik yang besar.
PENGARUH VOLUME SERAT REKEL TERHADAP KEKUATAN TARIK DAN IMPACT KOMPOSIT SEBAGAI BAHAN PEMBUATAN DASHBOARD MOBIL Herwandi Herwandi; Sugianto Sugianto; Somawardi Somawardi; Muhammad Subhan
Prosiding Semnastek PROSIDING SEMNASTEK 2014
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Penggunaan serat alam sebagai bahan komposit untuk pembuatan komponen kendaraan dewasa inibanyak  digunakan,  diantaranya  adalah  serat  kelapa,  jute,  rami,  sisal,  dan  kenaf.Kondisi    inisangatlah  sulit  bila  hanya  bergantung  pada  beberapa  serat,  padahal  masih  banyak  tanaman  lainyang belum tersentuh. Oleh karena itu, perlu alternatif lain misalnya dengan serat rekel (serat resamdan  serat  kelapa).Resam  merupakan  pakis  hutan  yang  hidup  di  perkebunan  karet  dan  tumbuhhampir diseluruh provinsi di Indonesia.Tumbuhan ini menjalar dan memiliki panjang kurang lebih7 meter. Pemanfaatan resam hanya untuk bahan baku kerajinan tangan. Untuk itu perlu dilakukanpenelitian  terhadap  penggabungan  serat  kelapa  dengan  serat  resam  agar  memiliki  pemanfaatanlebih  luas.  Tahapan  penelitian  ini  yaitu:  pembuatan  sampel  uji,  pengujian  mekanik  dan  analisisdata. Bahan-bahan untuk pembuatan sampel uji diantaranya adalah serat resam, serat kelapa, resinjenis  Yukalac  157  BQTN-EX,  MEKPO  sebagai hardener,  dan wax  glasses sebagai  pencegahmenempelnya  resin  ke  cetakan.  Benda  uji  dibuat  dengan  cara  mencampurkan  secara  acak  seratresam dan serat kelapa ke resin. Sebelumnya serat sudah dibuat tiga ukuran yaitu: 3 mm, 10 mm,dan 20 mm. Kemudian serat ditimbang sesuai  prosentase yang diinginkan. Parameter prosentaseserat    25%,  30%,    dan  35%    dan  prosentase  curing  agent 1,5%.  Ukuran  benda  uji  berdasarkanstandar uji tarik (ASTM D 638) dan uji impact (ISO-179). Nilai paling tinggi uji tarik adalah 30,05MPa, modulus elastisitasnya 2425 MPa dan regangannya 1,65%. Sedangkan nilai paling tinggi ujiimpact adalah 67,8 kJ/m2. Hasil ini menunjukkan  uji tarik dan uji impact sudah memenuhi standarplastik yang digunakan  dashboard mobil.
Analisis Pengaruh Media Pendingin Terhadap Kekerasan Baja S45C Pada Proses Hardening-Tempering Alfian Siswara Arlingga; Somawardi -; Sugianto -
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 3 No 1 (2021): Edisi Agustus 2021
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (854.136 KB) | DOI: 10.36655/sprocket.v3i1.565

Abstract

This study used an experimental method, in the form of the heat treatment hardening 930⁰C with the variations in the cooling media of the coconut water, table salt water, mineral waterwater, coolant radiator, and dromus water and variations in temperatures of tempering 200⁰C, 420⁰C, and 600⁰C, the specimens were cylindrical in diameter 25 mm and 20 mm in length, this study aims to determine the optimum hardness value of S45C steel specimens due to the heat treatment process hardening-tempering. From the results of the study, there is the effect of hardening 930⁰C there is the most optimal hardness value found in coconut water cooling media with the hardness level of 53.5 HRC. Under the influence of tempering 200⁰C there is the optimum hardness value found from the influence of mineral water cooling media with the hardness level of 50.7 HRC, while the influence of tempering 420⁰C there is the most optimal hardness value from the influence of mineral water cooling media with the hardness level of 41.8 HRC, and for tempering effect 600⁰C there is the most optimal hardness value available from the influence of the coconut water cooling media with the hardness level of 35.93 HRC.
PENINGKATAN KAPASITAS DAN KUALITAS PRODUKSI AMPIANG DI DESA SINAR JAYA KABUPATEN BANGKA yuliyanto yuliyanto; Somawardi Somawardi
Jurnal Pengabdian Masyarakat Polmanbabel Vol. 2 No. 02 (2022): DULANG : Jurnal Pengabdian Kepada Masyarakat
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/dulang.v2i02.245

Abstract

Ampiang is an authentic Bangka Belitung food made from tapioca, fish, water, salt and flavorings. Then in a round and thin shape with a diameter of 70 mm. You can find Ampiang bus at a warung or supermarket in Bangka Belitung. The objective of the Community Partnership Program (PKM) for the ampiang-making community groups is to improve the quality and production capacity of ampiang for partners. A survey has been conducted on ampiang making partners in Sinar Baru Sungailiat Village under the name "Ampiang Ikan Ciu Yu Erin". The problem that occurs to these partners is that the production equipment for the ampiang oil dryer at the partner is still manual, namely coating old paper or newspapers in the hope of reducing oil. So that ampiang does not last long and quickly causes mold and unpleasant odors. The method used is to make an Ampiang dryer with a capacity of 15 kg/process, which has a portable form so that it is easy to move around and conducts brief training on how to use and maintain an oil dryer. It is portable so it is easy to move around. As a result, Partners can increase the production of ampiang and this machine is able to produce ampiang which is more durable, more than 5 months. Based on the test results with a capacity of 15 kg Ampiang, 1000 rpm rotation, processing time of 5 minutes produces an average of 14.45 kg of dry Ampiang and 0.52 oil that has been separated. This means that every 1 kg of ampiang produces 0.036 kg of oil. This oil is what makes ampiang not durable and causes an unpleasant odor. This is also evidenced by the evaluation of ampiang's resistance for 5 months that has not shown any fungus attached to the ampiang.
PENGARUH PENAMBAHAN SERBUK KARBON, ANTRASIT, DAN ARANG KAYU TERHADAP KEKERASAN BAJA AMUTIT DALAM PROSES PERLAKUAN PANAS DENGAN MEDIA PENDINGIN AIR, AIR LAUT, AIR ES DAN OLI Anggi Leonardo; Somawardi Somawardi; Yuliyanto Yuliyanto
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

In the industrial world has many complex problems about metals, therefore there needs to be a variety of heat treatment on metals in order to obtain the desired product. Therefore, in this study was conducted to obtain data on the effect of heat treatment on the hardness value and micro structure of Amutit steel and the influence of hardening process with three types of enhancing media namely carbon powder, anthracite, and wood charcoal with four variations of cooling media namely Ordinary Water, Sea Water, Ice Water and Oil. With this research is also expected to be useful in the manufacturing industry. The purpose of the study was to obtain optimum hardness due to the process of heat treatment and rapid cooling. Steel material amutit K-460 / AISI 01 is included in the classification of steel tools used in the manufacturing industry to help the production process such as cutting tools and as a mold material for plastic materials. Based on the results of the research that has been done, it can be concluded that Baja amutit or AISI 01 has a hardness of 16.3 HRC without treatment. The hardness of this amutit steel is able to be increased through heat treatment with rapid cooling. Heat treatment done with the addition of activated carbon media is harder in comparison with the addition of Anthracite media and wood charcoal media. The highest hardness is influenced by the form or dimension of activated carbon that is smoother than other media, where the smoother or smaller the dimensions of the enhancer material, the faster the diffusion process occurs. Where the average hardness for the addition of activated carbon media is Sea Water (64.13), Plain Water (63.46), Oil (63.83), and Ice Water (66.2) with HRC units, As for anthracite media, namely Sea Water (58.26), Plain Water (54.76), Oil (51.8), and Ice Water (55.8) with units of HRC and Wood Charcoal media of Sea Water (58.33), Plain Water (51.83), Oil (45.8), and Ice Water (58.8) with units of HRC.
Analisa Pengaruh Ukuran Mesh dan Curring Time Pada Komposit Serbuk Kayu Nyatoh Terhadap Pengujian Tarik Somawardi, Somawardi; Akbar Rafsanjani, Alfarobbi; Yuliyanto, Yuliyanto; Sukanto, Sukanto
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.v15i02.274

Abstract

Various types of trees grow in Indonesia, one of which is the Nyatoh tree. Uses: This nyatoh wood tree is very useful as a material for building houses, making furniture, and so on. In the process of processing nyatoh trees into finished materials, shavings or powder will be produced, but the use of shavings or powder has not been utilized optimally. So the rest of the process makes the surrounding environment dirty and unsightly. This composite material has the advantages of adjustable strength, excellent fatigue strength, corrosion resistance, light weight and very low production costs. The aim of this research is to determine the tensile test value of nyatoh wood powder composites at volume fractions of 5%, 10%, 15% with a mesh size factor of 100, 150, 200 and a curing time of 2 hours with a heating temperature of 60 ?, 80 ?, 100 ?. The research method used is the full factorial method. The composite material is made using the hand-lay-up method. The highest tensile strength value in this research was a 5% sample with a mesh size of 200 and a curing time temperature of 60 ? with a tensile test result of 30.60 Mpa. Meanwhile, the lowest tensile strength result was 10.97 Mpa at a powder fraction of 5% with a mesh size of 100 and a curing time with a temperature of 60 ?. The size of the mesh greatly influences the tensile testing, where the higher the mesh used, the tensile strength increases. Meanwhile the heating process (curring time) also has an influence, but not so big, the higher the temperature of the curing time will cause a decrease in tensile strength.
PENINGKATAN PRODUKSI UMKM STIK IKAN CEMILAN KHAS BANGKA BELITUNG DI JALAN COKRO AMINOTO SUNGAILIAT DENGAN TTG MESIN PENGGORENG Yuliyanto, Yuliyanto; Somawardi, Somawardi; Subhan, Muhammad; Hakim, Zikrul
Jurnal Pengabdian Masyarakat Polmanbabel Vol. 4 No. 02 (2024): DULANG : Jurnal Pengabdian Kepada Masyarakat
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/dulang.v4i02.362

Abstract

Bangka Setara is the vision and mission of Bangka Regency as stated in the 2019-2023 RPJMP. Bangka Setara means Prosperous and Noble. Especially in fulfilling material and spiritual resilience in high and even economic growth at the Community Income Level and free from poverty and equitable development between villages and cities. MSMEs are one of the government's targets in increasing Community Income. In achieving this target, the government together with Polman Babel lecturers in the Community Service (PkM) program. The 2023 PkM Program focuses on MSMEs in the Fish Stick making group on Jalan Cokro Aminoto, Sungailiat District, Bangka Regency. The aim is to increase production capacity and quality and improve the business management system for partners. The production process carried out by partners in the frying section still uses manual methods so that production capacity is limited. In addition, in terms of business management, the partners are still not optimal. The steps taken to overcome the above by the proposing team and partners agreed to increase production capacity and improve the business management system. The method used to solve production problems is by providing a frying machine driven by a low-watt electric motor to partners, while the method to overcome business management problems is by conducting short training on small industry business management. The results of this service are felt by partners to be very helpful in the production process they do. Because they can do other processes such as packaging and packing. The frying results are even with brighter colors and also reduce oil content. Increased production results and the frying process becomes faster.
Analisa Kekuatan Impak Sambungan Las Gesek Dengan Variasi Waktu Pada Dua Material Baja Aisi 1040 Dengan SS 400 Abriansyah, Fadhlurrohman; Sugiyarto, Sugiyarto; Somawardi, Somawardi
Jurnal Inovasi Teknologi Terapan Vol. 1 No. 1 (2023): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v1i1.71

Abstract

Welding plays an important role in every metal working and repair in the production process. There are various methods to overcome problems in the meterial connection process. One of them is friction welding which is one of the solutions in solving metal joining problems. In this study, the method used is the RSM (Response Surface Method) method which aims to determine the value of impact strength on AISI 1040 steel which is connected to SS 400 steel which has been carried out the Friction Welding process. This study uses an impact test in accordance with the standard ASTM E23 impact test charpy method with a size of 55 mm × 10 mm × 10 mm with a notch depth of 2 mm, and a notch angle of 45 °. The impact test was conducted using the Charpy method impact testing machine model JB-300B. With a pendulum capacity of 150 Joules. Based on the results of the impact test, the largest value was obtained in the 6th and 7th experiments with an impact price value of 2.575 joules/mm2, while the smallest value was in the 3rd experiment with a value of 1.557 joules/mm2
Rekayasa Komposit Matrik Aluminium Diperkuat Alumina Dan Bagasse Ash Dengan Metode Metalurgi Serbuk Al Ghifari , M Ghazi; Somawardi, Somawardi; Rusdi, Ahamad; Sukanto, Sukanto
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.v2i2.151

Abstract

In general, brake linings are made using asbestos materials, but brake linings made from asbestos are very dangerous for health. Therefore, it is necessary to develop innovative environmentally friendly materials, one of which is aluminum matrix composite. This research process aims to determine the effect of differences in hot compaction pressure and sintering temperature on the density and hardness properties of recycled aluminium matrix composites reinforced with alumina and bagasse ash. The method used to make composites from aluminum is the powder metallurgy method, which includes preparation processes, powder mixing, compaction, and sintering. Mixing aluminium, alumina powder, and bagasse ash using a horizontal ball mill machine and using process parameters which include Ball Powder Weight Ratio (BPR) parameters of 10:1, the machine rotation speed of 90 rpm, and grinding time of 2 hours. Meanwhile, the hot compaction process uses a two-way pressing method with a hydraulic pump machine that has a pressure reader. The hot compaction process is carried out with a temperature of 500℃ held for 15 minutes and variations in the two-way compaction pressure used namely 5800 Psi, 6000 Psi, and 6400 Psi. Density testing was carried out by referring to Archimedes’ law with the ASTM B962-17 standard. This test resulted in good results at a pressure variation of 6400 Psi. Meanwhile, for hardness testing, the portable Brinell hardness test was used and referred to ASTM E110-14. In this test, the results were good at a pressure variation of 6400 Psi.
Co-Authors Abriansyah, Fadhlurrohman Akbar Rafsanjani, Alfarobbi Al Ghifari , M Ghazi Alfian Siswara Arlingga Anggi Leonardo Anggraini, Asty Bilal Pratama, Muhammad ERVAN AGUSTIAN Erwansyah Erwansyah Hakim, Zikrul Muhammad Hasan Muhammad Subhan Muhammad Subhan Ramadhani Harahap, Dedy Rusdi, Ahamad Sabila Rizky, Putra Pratama Sahril Sahril Sembiring, Rinawati Solly Aryza Somawardi Somawardi Sugianto Sugianto - Sugianto Sugianto Sugiyarto Sugiyarto Sukanto Sukanto Yulianto, Ferisa Yuliyanto Yuliyanto Yuliyanto