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ANALISA NILAI KEKASARAN PERMUKAAN MATERIAL BAJA AISI 4340 PADA PROSES PERMESINAN BUBUT CNC DENGAN METODE TAGUCHI Ariandi_saputra; Muhammad Subhan; Indah Riezky Pratiwi
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 results of the minimum surface roughness in the MORI SEIKI SL-25 CNC machining process, the parameters of the MORI SEIKI SL-25 CNC machining process are adjusted in order to obtain a minimum workpiece surface roughness reaction. The research that has been tried aims to ensure the contribution of the CNC MORI SEIKI SL-25 machining process parameters to reduce the alteration of the workpiece surface roughness reaction simultaneously. As well as setting the right parameters of the CNC MORI SEIKI SL-25 machining process parameters in order to obtain a minimum workpiece surface roughness. The machining process parameters that were varied were cutting speed, feed depth and feed motion. The experimental design was inaugurated based on the Taguchi method and in the form of an orthogonal matrix L9 (33). The analysis used is Taguchi. Experiments were carried out randomly with 3 replications to overcome the obstacles that occurred during the machining process. The research results show that to reduce the alteration of the response simultaneously, the cutting speed has a value of 61.98%, the depth of feed has a value of 16.28%. And eating motion has the smallest value of -12.45%. To obtain a minimum workpiece surface roughness on AISI 4340 steel with the MORI SEIKI SL-25 CNC machining process, the cutting speed is set at 130 m/min, the feed depth is set at 1.0 mm and the feed motion is set at 0.55 mm/put.
STUDI EKSPERIMEN PENGARUH SUHU HARDENING DENGAN QUENCHING MEDIA AIR LAUT TERHADAP KETANGGUHAN BAJA ST 60 Abdillah Halim; Muhammad Subhan; Zaldy Kurniawan
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

ST 60 steel is a medium carbon steel that is often used in machine construction such as shafts and shipbuilding, but impact loads often occur. The purpose of this study was to determine the best toughness of st60 steel from the effect of temperature on the hardening process. The method used for data processing in this study is the two way ANOVA method without interaction. The variables used in this study were temperature (900, 930, 950⁰C) and holding time (30, 60, 90 minutes). The best toughness results were obtained at a temperature of 900⁰C with a holding time of 30 minutes (2.5934 J/mm2) with the lowest toughness results were obtained at a temperature of 950⁰C and a holding time of 90 minutes was obtained at (2.5588 J/mm2).
PEMBERDAYAAN MASYARAKAT LOKAL MELALUI PROGRAM EDUKASI SEJARAH DI MUSEUM LINGGARJATI KABUPATEN KUNINGAN Muhammad Subhan; Hermansyah; Arik Darojat; Ungkeu Martin
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 03 (2026): Volume 11 Nomor 03, September 2026 Verified
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i03.58932

Abstract

Museums play a strategic role as a means of public education in enhancing community understanding of historical values while also supporting the preservation of cultural heritage. However, the low level of historical literacy among the public and the suboptimal utilization of museums as learning media have resulted in the educational potential of museums not being fully maximized. Therefore, this Community Service activity aims to improve public understanding of the history of the Linggarjati Agreement and to encourage community participation in preserving historical sites through a historical education program conducted at the Linggarjati Museum, Linggarjati Village, Cilimus District, Kuningan Regency. The method used in this activity is a participatory educational approach through historical outreach, interactive discussions, historical literacy, and educational visits to the museum. The evaluation of the activity was carried out using pretest and posttest methods involving 21 participants to measure the level of understanding before and after the educational program. The data obtained were then analyzed using the N-Gain test to determine the level of improvement in participants’ understanding. The results show that the average pretest score of 56.40 increased to 82.30 in the posttest. The N-Gain analysis result of 0.59 falls into the moderate category, indicating that the historical education program is sufficiently effective in improving public understanding and encouraging participation in the preservation of local cultural heritage.
Co-Authors A.A Miftah AA Miftah Abdillah Halim Achmad Rusdy Addiarrahman Agustin Sukarsono, Agustin Agustina Mutia Ahmad Bashawir Abdul Ghani Ahmad Ilham Asmaryadi Andang Andang Andi Dian Angraini Anzu Elvia Zahara Ariandi_saputra Arik Darojat Arnold Arnold Arsa Arsa Cici Hersita Cornelius Rantelangi Cut Nasywa Kesuma Dany DEO SYAH PUTRA Desri Amrainum Dhea Indriani Dias Pebriyani Dwi Risma Deviyanti Ella Asri Fauziah Elvi Silvia Emma Lilianti, Emma FATIMAH FATIMAH Fatma Salsabila Ferdi Pratama Ferzy Ersandy Filahanasari, Eka Frissia Friszki Melati Habriyanto Habriyanto Hafiz Fadhil Hasdiansah, Hasdiansah Hermansyah Hermansyah Hermansyah Indah Riezky Pratiwi Indah Rizqika Intan Tri Nanda Irwansyah Irwansyah Lara Parida Lilik Erviani Lis Suswati M. Bagus Permana Mahesa APRILIA Mawaddah Sri Rezeki Dalimunthe Mayumi Ershanda Meira Parma Dewi Merinda Nur Indahsari Minora Longgom Nasution Mira Ulpayani Harahap Muh. Taufik LaOde Muhamaad Rizki Muhamad Aris Muhammad Chotim MUHAMMAD SUKRON Muharrammah Isnaini Nabila Husna Nabila Ihza Nur Muttaqi Nasution, Amalia Rahmi Ni ketut Marjani Ninin Non Ayu Salmah, Ninin Non Ayu NUR ASIFAH Nurul Yaqin, Fitria Sri Dewi Oktaria Marlinda Pristiansyah, Pristiansyah Putra Apriadi Siregar Rabiyatul Alawiyah Ramli Ramli Rande Samben Ridha Panalia Siregar Riry Sriningsih Rizkia Safitri Rofiqoh Ferawati Romiza Arika Safitri, Auliya Nur Shelvia Mandasari Sintia Eka Putri Sitti Nur Ilmiah Suci Rahma Putri Suci Rizka Welza Putri Sugianto Taswin Ula, Rahmah Arfiyah Ungkeu Martin Wahidah, Fita Fitriatul Windi Afril LEstari Yarman Yarman yudi Arpa Yunus Tete Konde Yus'iran Yus'iran Zaldy Kurniawan