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All Journal Jurnal Teknologi Jurnal Rekayasa Mesin BANGUN REKAPRIMA Media Teknika Infotekmesin Jurnal Abdi Panca Marga
Mohammad Nurhilal
1) Jurusan Teknik Mesin Politeknik Cilacap Jl. Dr. Sutomo No.1 Sidakaya, Cilacap
Religion Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Mechanical Engineering Physics Social Sciences Other

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Karakteristik Briket Arang Sekam Padi dan Arang Kulit Bawang Putih Nurhilal, Mohammad; Tarigan, Roy Aries Permana
Media Teknika Vol 12, No 2 (2017)
Publisher : Sanata Dharma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (747.35 KB) | DOI: 10.24071/mt.v12i2.1081

Abstract

Indonesia is endowed with abundant  natural wealth capable of being transformed into an energy source. However, until now the utilization of natural resources can not be optimally processed. One alternative solution to make the fuel as a substitute for LPG is to fuel the briquettes. The general purpose of this research is the manufacture of briquettes from waste  materials such as rice husk and garlic skin. While the specific purpose of this research is to know the characteristic of proximate briquettes such as: water content, ash content, fixed carbon, volatile matter, and calorie briquettes, variations of glue composition glue 200, 250, 300 gram, kanji starch composition 20, 30, and 40 gram and paper pulp 50 w / w and 100 w / w of total weight of adhesive 20 gram, and jelantah cooking oil. Methods in this research are experimental approaches such as, making briquettes, and testing the characteristics of briquettes. The results of research on water content, ash content, fixed carbon, volatile matter and calorific briquettes of rice husk huskers were 33,493%, 39,966%, 29,058%, 30,923% and 3873,500 kal / gram respectively. While the characteristics of garlic skin briquettes produced the highest price respectively 35.986%, 9.650%, 42.373%, 34.479%, and 4783.654 cal / gram.Keywords: Characteristics of briquettes, rice husk, garlic skin.
PENGARUH TEMPERATUR, HOLDING TIME PROSES PACK CARBURIZING BAJA KARBON TERHADAP SIFAT FISIK DAN MEKANIK Nurhilal, Mohammad
Jurnal Teknologi Vol 10 No 2 (2017): Jurnal Teknologi
Publisher : Jurnal Teknologi, Fakultas Teknologi Industri, Institut Sains & Teknologi AKPRIND Yogyakarta

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

Abstract

Baja merupakan suatu material yang mempunyai peranan penting dalam dunia industri. Baja sering kali digunakan sebagai bahan dasar pembuatan komponen mesin maupun bahan konstruksi. Untuk mendapatkan jenis material yang memiliki sifat-sifat yang dikehendaki dapat dilakukan dengan perlakuan kembali terhadap material dengan teknik yang terarah. Salah satu cara untuk mengubah sifat dari baja karbon adalah dengan metode pack carburizing. Penelitian ini memiliki tujuan menentukan harga kekuatan tarik, kekerasan, analisa struktur mikro pada proses pack carburizing variasi temperatur dan holding time, dan analisa komposisi baja karbon pada material dasar. Metode penelitian ini adalah eksperimen melalui pengujian laboratorium baja karbon dengan metode pack carburizing variasi temperatur dan holding time terhadap sifat fisik dan mekanik. Hasil pengujian kuat tarik material dasar sebesar 1,212 kN/mm2, sedangkan harga kuat tarik terbesar pada variasi temperatur 875 oC pada holding time 10 menit yaitu sebasar 8,27 kN/mm2. Hasil uji kekerasan material dasar sebesar 2,842 HV, sedangkan harga kekerasan terbesar pada variasi temperatur 875 oC pada holding time 10 menit yaitu sebasar 9,672 HV. Hasil uji struktur mikro terhadap material dasar adalah ferrit, perlite, dan martensite, sedangkan struktur mikro material setelah proses pack carburizing semua sama yaitu peralite dan martensite. Hasil uji komposisi terhadap material dasar yaitu material baja karbon tinggi.
RANCANG BANGUN MESIN FRICTION WELDINGUNTUK PENGELASAN BAJA ST 37 DENGAN DIAMETER MAKSIMAL ½ INCH Kurniawan, Ipung; Pujono, Pujono; Nurhilal, Mohammad; Prabowo, Dian
Bangun Rekaprima: Majalah Ilmiah Pengembangan Rekayasa, Sosial dan Humaniora Vol 8, No 1, April (2022): Bangun Rekaprima
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (28.714 KB) | DOI: 10.32497/bangunrekaprima.v8i1, April.3537

Abstract

Pengelasan gesek merupakan proses pengelasan tanpa menggunakan bahan tambah. Gesekan diakibatkan oleh pertemuan kedua benda kerja yang menghasilkan panas kemudian melumerkan kedua ujung benda kerja dan akhirnya terjadi proses penyambungan benda kerja. Tujuan dalam rancang bangun mesin friction welding yaitu membuat perancangan pada mesin friction welding, menghitung komponen elemen mesin, menghitung mekanika teknik pada rangka, menghitung gaya dorong aktuator, menghitung estimasi total waktu proses produksi, melakukan uji fungsi pada bagian sistem transmisi dan kontrol tekan dan uji hasil variasi diameter besi pejal silinder. Metode perancangan dengan pendekatan metode VDI 2222. Hasil dari rancangan berupa desain mesin friction welding. Dihasilkan motor listrik yang digunakan memiliki daya 1,5 HP, puli yang digunakan Ø6 inch dan Ø2 inch, sehingga didapati putaran sebesar 4200 rpm, panjang v-belt 1.324,18 mm, poros memiliki ukuran Ø25 mm.Hasil dari rancang bangun didapatkan hasil yaitu material yang digunakan yaitu besi siku dan kanal U dengan ukuran frame 1200x400x855 mm, slider 400x206x200 mm. Gaya dorong yang dihasilkan aktuator sebesar 480 N. Estimasi total waktu produksi selama 20,24 jam. Sistem transmisi mampu meneruskan daya dari motor penggerak menuju rotary chuck dan kontrol tekan mampu bergerak maju dan mundur. Mesin friction welding berhasil menyambung besi pejal silinder dengan Ø6 mm, Ø8 mm, Ø10 mm dalam waktu 1 menit,berhasil menyambung 2 besi pejal silinder dengan ukuran Ø1/2 inchi dengan variasi tekanan 6[bar], 7[bar], 8[bar], namun besi tersambung tidak sempurna. Hasil uji tarik menunjukkan kekuatan tarik tertinggi sebesar 153 MPa
Pengaruh Delignifikasi Alkali terhadap Perubahan Struktur Lignoselulosa Serbuk Sabut Kelapa sebagai Pengisi Komposit Geopolimer Tarigan, Roy Aries Permana; Pramita, Ayu; Hastuti, Sri; Nurhilal, Mohammad
Jurnal Rekayasa Mesin Vol. 19 No. 3 (2024): Volume 19, Nomor 3, Desember 2024
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v19i3.6050

Abstract

Sabut kelapa, salah satu komoditi di Cilacap, memiliki potensi besar sebagai bahan olahan untuk berbagai aplikasi termasuk sebagai pengisi komposit geopolimer. Namun, kandungan lignin yang tinggi pada serbuk sabut kelapa dapat menghambat pemanfaatannya secara optimal. Delignifikasi alkali merupakan metode yang digunakan untuk mengurangi lignin dan meningkatkan selulosa. Penelitian ini bertujuan untuk mengetahui pengaruh delignifikasi alkali terhadap perubahan struktur lignoselulosa serbuk sabut kelapa, sehingga hasil penelitian ini dapat dijadikan referensi pada optimalisasi sifat mekanik komposit geopolimer. Metode penelitian meliputi perlakuan delignifikasi alkali, dengan variasi konsentrasi 1% dan 2% larutan NaOH, pada serbuk sabut kelapa dan karakterisasi struktur lignoselulosa menggunakan Chesson-Datta dan FTIR (Fourier Transform Infra Red). Hasil penelitian menunjukkan bahwa perlakuan delignifikasi alkali berhasil menurunkan kadar lignin pada interval 9% - 11% dan mengubah struktur lignoselulosa serbuk sabut kelapa. Berdasarkan hasil FTIR, puncak serapan bilangan gelombang 3310,83 cm-1 membuktikan adanya gugus fungsi O-H stretch, pada bilangan gelombang 2917,56 cm-1 membuktikan adanya gugus fungsi C-H Stretch. Puncak bilangan gelombang 1370,68 cm-1 membuktikan adanya gugus fungsi C-H bend dan pada bilangan gelombang 1225,78 cm-1 membuktikan adanya gugus fungsi C-O stretch.
Rancangan Alat Elektroplating dan Eksperimen Pelapisan Berbahan CuSO4 Terhadap Ketebalan Lapisan Nurhilal, Mohammad; Ratri Harjanto, Taufan; Bahri, Saipul; Purwiyanto, Purwiyanto
Infotekmesin Vol 12 No 1 (2021): Infotekmesin: Januari 2021
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v12i1.489

Abstract

The electroplating method has the aim of producing a surface that has characteristics by the coating metal. The coating process requires a device that can place the ions from the coating material (anode) into the coated metal (cathode) through an electro-deposition process. Parameters such as temperature affect the electroplating process and greatly determine the coating result. The purpose of this study was to design the electroplating device, as well as to test the coating process using CuSO4 anode. The research method was carried out with an experimental approach through the manufacture of electroplating tools and coating testing of time variations of 20, 26, 32, 38, and 44 minutes and temperatures of 60, 65, 70, 75, and 80 oC. The results of the electroplating device design consist of frame components, plating and rinsing tubs, electrical systems, and cathode hanger. The coating results obtained the highest layer thickness 2.890 μm at a temperature of 80 oC for 40 minutes.
Efek Temperatur Pengarangan Cangkang Kerang dan Tulang Sapi Terhadap Proximate Nurhilal, Mohammad; Dwityaningsih, Rosita; Purwanti Sri Rahayu , Theresia Evila; Ariawan, Radhi
Infotekmesin Vol 13 No 1 (2022): Infotekmesin: Januari, 2022
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v13i1.1018

Abstract

Studies on the use of animal waste as charcoal ingredient in the needs of activated charcoal material has been carried out and developed. Activated charcoal is produced through activation process at a certain temperature, condition, and time in order to creat a higher carbon content in charcoal . One of the important factors in the manufacture of activated charcoal is the temperature during the production process. The purpose of this study is to discuss the influence of temperature factor of mussel shells and beef bones on water content, ash content, volatile matter and fixed carbon during the charcoal production process. The research is carried out through experimental method of making chorcoal with temperature variations of 400, 500, 600, 700, and 800 oC. The result of the experiment shows the highest ash content and water content found respectively in beef bone charcoal of 800 oC which is 98,697 %, and of 400 oC which is 4,942 %, while the highest volatile matter and fixed carbon levels are found in clam shell charcoal of 800 oC which is 6,717 %, and of 500 oC which is 43,282 %. The result concluded that the effect of the temperature of the production process affects the water content, ash, volatile matter and fixed carbon.
Pengaruh Variasi Konsentrasi H3PO4 Sebagai Zat Aktivator Terhadap Karakteristik Karbon Aktif dari Sekam Padi Dwityaningsih, Rosita; Rahayu, Theresia Evila Purwanti Sri; Handayani, Murni; Nurhilal, Mohammad
Infotekmesin Vol 14 No 1 (2023): Infotekmesin: Januari, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i1.1641

Abstract

Rice husk is an organic material that has a high lignocellulosic content so it has the potential to be turned into activated carbon. One method of making activated carbon is activation with a phosphoric acid activator (H3PO4). The purpose of this research was to study the effect of varying concentrations of H3PO4 as an activator on the characteristics of rice husk-activated carbon. The characterization refers to SNI 06-3730-1995 regarding the technical quality requirements of activated charcoal. Activation of rice husk carbon was carried out by contacting the carbon with H3PO4 for 24 hours and shaking it. The H3PO4 consisted of 3 concentration variations, namely 4M, 6M, and 8M. From the research results, the water content was 3.936%; 4.037%; 4.070%, the absorption of iodine has met the character of activated charcoal according to SNI, namely 1217.204 mg/g; 1204.255 mg/g; 1184.832 mg/g while the ash content value does not meet the SNI standard, which is still above 10%. The highest adsorption capacity and adsorption efficiency could be activated with 8M H3PO4, namely 22.42 mg/g and 89.68%. IR spectra on activated carbon with three variations of H3PO4 concentration showed the presence of aromatic C-H, C=C, and C-O anhydride functional groups.
Analisis Porositas, Tekstur, dan Morfologi Karbon Tempurung Nipah Hasil Pirolisis Suhu Tinggi Untuk Anoda Baterai Sekunder Rahayu, Theresia Evila Purwanti Sri; Nurhilal, Mohammad; Dwityaningsih, Rosita
Infotekmesin Vol 14 No 1 (2023): Infotekmesin: Januari, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i1.1666

Abstract

Lithium-ion batteries are the recent main store of electrochemical energy that have been widely used for electronic equipment, electric vehicles, and also renewable energy storage such as wind and solar. Lithium-ion batteries have many electrochemical advantages but lithium availability in nature is reduced very quickly and its distribution is uneven throughout the world. Sodium is attractive as an alternative to lithium insertion for secondary batteries because of its abundant availability and oxidation reduction potential to standard hydrogen electrodes only 0.3 volts higher than lithium. This study aims to synthesize hard carbon from nipah shell biomass using thermal methods of low-temperature pyrolysis (lower than 200 oC) followed by high-temperature pyrolysis (higher than 1000 oC). Characterization is carried out by iodine number analysis to determine porosity and SEM-EDX to determine texture and morphology. The result of the analysis of carbon iodine number is 346.86 mg/g while SEM-EDX analysis showed that carbon has a structure similar to a combination of graphene and nano-tube carbon.
Studi Perancangan Instalasi Penerangan dan Pengkondisi Suhu Ruangan Pada Gedung Bertingkat Las Mesin Prasetia, Vicky; Alimudin, Erna; Purwiyanto, Purwiyanto; Yusuf, Muhamad; Nurhilal, Mohammad
Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i2.1895

Abstract

Lighting is one of the most important requirements of a building. This is because inadequate lighting of a space can affect the health and comfort of activities in that space. In addition to less important lighting, room temperature adjustments, room temperature adjustments have a significant impact on comfort during activities in the room. This magazine describes the lighting and room temperature control design of the CilacapState Polytechnic Welder Shop. The method used in this study is a quantitative method. This method calculates the required lighting and room temperature control and compares it with the standards. 2 rooms increase the number of light points and 3 rooms change the type of lamp with a higher lumen. There are 8 rooms that are recommended to use air conditioners with SNI 91714189. According to the SNI, the number of air conditioners and the capacity of air conditioners adjusts to the size of the room.
Pengaruh Jenis Limbah Aluminium Pada Proses Pengecoran Menggunakan Tungku Krusibel Terhadap Nilai Kekerasannya Dwi Putra, David; Haqqoni, Faisal; Nurhilal, Mohammad; Ulikaryani, Ulikaryani
Infotekmesin Vol 14 No 2 (2023): Infotekmesin: Juli, 2023
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v14i2.1948

Abstract

Aluminum waste that has accumulated due to the widespread use of aluminum in household needs, daily life, and in the manufacture of industrial material components will have an impact on the environment if not handled properly. It is necessary to utilize aluminum waste in a product that has a sale value through a casting process using a crucible furnace. This research was conducted to determine the hardness differences of waste aluminum from used aluminum cans, used aluminum pots, and used aluminum wires melted in a smelting furnace. This study uses quantitative analysis and experimental research types. Tests carried out on this crucible furnace were carried out to determine the effect of the type of aluminum waste and the length of time it took to smelt the three types of material on the hardness results. The results of the Rockwell hardness test on aluminum can waste have an average value of 71.38 HRB, on aluminum pans waste it has an average value of 71.68 HRB, and on aluminum cable waste it has an average value of 53.02 HRB.
Co-Authors Aji, Galih Mustiko Alimudin, Erna Dian Prabowo Dwi Putra, David Dwityaningsih, Rosita Evila Purwanti Sri Rahayu, Theresia Haqqoni, Faisal Kristiningsih, Ari Kurniawan, Ipung Luthfiyah, Almira Muhamad Yusuf, SE., M.Si. Murni Handayani Pramita, Ayu Prasetia, Vicky Pujono, Pujono Purwanti Sri Rahayu , Theresia Evila Purwiyanto, Purwiyanto Radhi Ariawan Rahayu, Theresia E.P.S. Ratri Harjanto, Taufan Roy Aries Permana Tarigan Saipul Bahri Sari Widya Utami Solly Aryza Tarigan, Roy Aries Permana Ulikaryani, Ulikaryani Whiting Hayati, Sheptia