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All Journal Jurnal Energi Dan Manufaktur Rotasi ROTOR: JURNAL ILMIAH TEKNIK MESIN Journal of Mechanical Engineering Science and Technology STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Jurnal Elemen ComTech: Computer, Mathematics and Engineering Applications Abdi Dosen : Jurnal Pengabdian Pada Masyarakat J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin JURMA : Jurnal Program Mahasiswa Kreatif JURNAL FLYWHEEL Journal of Fibers and Polymer Composites Prosiding Seminar Nasional Rekayasa Teknologi Industri dan Informasi ReTII
Dwi Djumhariyanto
Jurusan Teknik Mesin Fakultas Teknik Universitas Jember Jl. Kalimantan 37 Jember 68121
Religion Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation

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Journal : ROTOR: JURNAL ILMIAH TEKNIK MESIN

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Analisis Cacat Casting Akibat Variasi Lama Waktu Pengerasan dan Persentase Binder di PT. Barata Indonesia Ramadhanu, Arya; Syuhri, Ahmad; Djumhariyanto, Dwi
ROTOR Vol 7, No 1 (2014)
Publisher : ROTOR

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Abstract

Sand inclusion and pin hole are surface defects caused by molding sand. Therefore need by varying age sand and percentage of binder in sand molds. The purpose of this research to improve the quality of the product. Each treatment will through tensile strength test, then make a plate pattern for casted . Each plate will checked defects that occur, sand inclusion and pin hole . Data from this research will be analyzed using ANOVA factorial design 2x3. The results of this research with a percentage of 1.5% binder and age sand 24 hour produce sand inclusion of 0% and pin hole, 2 holes. Keywords: Sand inclusion, pin hole, binder, age sand
¬¬ANALISIS PEMBOROSAN PEMBUATAN SELUBUNG ROLL MILL PADA STASIUN PENGECORAN PT BOMA BISMA INDRA (PERSERO) PASURUAN MELALUI IMPLEMENTASI CRITICAL PATH METHOD (CPM) Islamiyah, Faizatul; Djumhariyanto, Dwi
ROTOR Vol 7, No 2 (2014)
Publisher : ROTOR

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Abstract

Critical Path Method is one of the network analysis methods are used to plan , schedule and monitor the project . Network consists of EET, LET, and  float . Critical activities are activities that dont have the free time ( float = 0 ) so there should not be delayed,  because it will affect the completion time  of project This study aims to analyze the critical path of the project of making roll mill sheaths , identify waste and its cause on critical activities , and make network s proposal to shorten the project completion time. Based on the research results, the highest score of waste iswaiting, this cause has22.43% score.This waste caused by the delay of material coming , waiting for the previous process, a limited quantity of machines and the operators is limited . After analysis using CPM method and create diagrams of network proposal,the result is production of 4 units roll mill which previously lasted 7 days can be shortened to 6 days with a critical path which must get special attention because if there is  delay in process it will affect to the other working processes which led to the delay in completion of the project. Keywords: Critical Path, EET, LET,
PENGARUH PUTARAN SPINDEL, GERAK MAKAN DAN SUDUT MATA PAHAT TERHADAP GETARAN BENDA KERJA ALUMINIUM 6061 PADA PROSES DRILLING Hadiyoto, Agung Eko; Mulyadi, Santoso; Djumhariyanto, Dwi
ROTOR Vol 7, No 2 (2014)
Publisher : ROTOR

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Abstract

Chatter in drilling process due to excitation, both from within and from outside the system but the resulting chatter effect is very dependent on the excitation frequency and the elements of the cheater system itself . This study aimed to determine the effect of spindle speed, feeding rate and tool angle in consideration of aspects of chatter in drilling process. In this experimental design experiments conducted using Drill Machine Model KMR Kao Ming-700DS. Spindle speed used is 136 rpm, 368 rpm and 681 rpm. Feeding used is 0.07 mm/rotation, 0.13 mm/rotation, 0.22 mm/rotation and use a variety of tool angle is 90˚, 100˚ and 118˚. Materials used for the experiment was aluminium 6061. chatter measurement results work material drilling process using a series of chatter test equipment with a number of fully testing is testing 27. Analysis of the data used is the linear regression. From the results of the testing results of the regression equation A = 103.371* (n)0.627* (f )0.581 * (2Kr)1.112 and R-square value 81.6 %. Spindle speed parameter, feed rate and tool angle jointly effect to the chatter of work material in drilling process. Keywords: Drilling, Chatter, Feeding, Spindle Speed
ANALISIS PENENTUAN PRIORITAS VARIABEL KLASTER INDUSTRI GENTENG UNTUK PENYUSUNAN STRATEGI PENGEMBANGAN KLASTER DENGAN MENGGUNAKAN ANALISA FAKTOR (STUDI KASUS INDUSTRI GENTENG DI KAB. JEMBER) Djumhariyanto, Dwi
ROTOR Vol 4, No 1 (2011)
Publisher : ROTOR

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Abstract

The presence of roof tile companies in Tamansari - Wuluhan - Jember has not shown the existence of synergies between companies and with other elements in order to improve innovation and business efficiency. This was reflected in most of the production process to the marketing of roof tile products that are still performed as an individual company. In other words, the concentration of roof tile companies in Tamansari stopped only to the extent of an industrial roof tile. Whereas, by making a group of roof tile companies in a certain area allows for collaboration between companies as well as with other elements in these area to improve business efficiency as well as the creation of a new innovation related to the roof tile industry. This researh aimed at identifying cluster variables of roof tile industry that will provide competitive advantage for the roof tile industry, and determine the cluster variables priorities that can be used as a reference to arrange a cluster development strategy in the future. Determination of the cluster variables based on the concept of Porters Diamond Model. Roof tile industry cluster variables identified are: The Quality of Labor, Capital Access, Transportation Facilities, Telecommunication Facilities, Excellent Quality of Roof Tile, Suppliers Companies, Industrial Equipment Provider Companies, Roof Tile Buyer Companies, Financial Institutions, Transportation Companies, Distributors of Roof Tile Companies, Roof Tile Business Associations, Companies Strategy, Organizational Structure, Similar Companies, Job Training Centers, Universities, Corporate Tax, Legal and Quality Standards. Determination of the cluster variable priority to cluster development strategy using factor analysis, with the following results: Related and Supporting Industries Factor with variables as follow: Suppliers Companies, Industrial Equipm[1]ent Provider Companies, Roof Tile Consumer Companies, Financial Institutions, Transportation Companies, Roof Tile Distribution Companies, Roof Tile Business Associations; Factor Condition Factor with variables as follow: The Quality of Labor, Capital Access, Transportation Facilities, Telecommunication Facilities; The Role of Government Factor with variables: Employment Training Centers, Universities, Corporate Tax, Legal and Quality Standards; and Firm Strategy, Structure and Rivalry Factor which the variables: Companies Strategy, Organizational Structure, Similar Companies. Keywords: competitiveness, diamond model, industrial cluster,  small and medium enterpris 1 Staf Pengajar Jurusan Teknik Mesin Fakultas Teknik Universitas Jember  
RANCANG BANGUN FLEXY BIKE SEBAGAI ALAT TRANSPORTASI ALTERNATIF KELUARGA INDONESIA Djumhariyanto, Dwi
ROTOR Vol 6, No 2 (2013)
Publisher : ROTOR

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Abstract

Bicycle (human powered vehicles) is very popular transportation appliance in society, with all excess and its insuffiency. Design bicycle specially form and its size measure adapted for ergonomi of body  human being with the certain age, its meaning minibike just to children, while big bicycle just to adult or child with the high body. So that is not rarely met, at one particular family own some bicycle type, as according to its wearer. as a result required a broader place many for the menyimpan of bicycle. This matter enough become the big problem in cities, where farm for the house of progressively narrow. To finish the problem, this research designed and made by a bicycle which can be used by all age (except baby), the bicycle Flexy Bike. Flexy Bike is bicycle having function fleksible. That is bicycle which can be functioned in so many form and size measure, without lessening security and its freshment. Others, Flexy Bike designed to can be folded, so that earn easily kept without requiring wide place. Keywords: bicycle, scheme, flexible and Flexy Bike
Pengaruh Variasi Fraksi Volume Filler Terhadap Kekuatan Mekanik Komposit Sandwich Polyester Serat Kenaf Core Styrofoam Sentosa, Aman; Sumarji, Sumarji; Djumhariyanto, Dwi
ROTOR Vol 8, No 2 (2015)
Publisher : ROTOR

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Abstract

Composite sandwich reinforcement  kenaf fiber polyester with Styrofoam core is an alternative material that has the potential to be developed as an application in various fields with an excess of nature that is strong, lightweight, rigid, able to withstand bending loads, impact, vibration damping and sound. This study is intended to overcome the problems of fishermen Muncar - Banyuwangi in the selection of materials manufacture of safe fish robust and insulated to preserve or maintain the freshness of the fish catch of fishermen low temperature. This study was conducted to determine the effect of variations in fiber volume fraction of the increase in impact strength and bending composite materials sandwich.Untuk get impact strength values ​​using the tool impact test with a maximum capacity of 300 joules specifications, pendulum mass of 20.9 kg, 0.83 m long pendulum arm, while to obtain bending strength values ​​using a universal testing machine capacity of 300 KN. Variations were used in this study is the percentage of fiber volume fraction of 10% fiber, 20%, 30%, and 40%. The results showed that the variation of fiber volume fraction of 40% had values ​​higher impact strength and bending of 0.30 Joules / mm² and 5,65MPa than the fiber volume fraction of 10% has impact and bending strength values ​​were lower at 0.14 joules / mm2 and 0.30 MPa. So in this study limits the variation of fiber volume fraction of 10% to 40% proved that if the greater the percentage of fiber volume fraction value will increase the value of impact strength and bending in composite sandwich. Keywords: fiber volume fraction, impact strength and bending, composite sandwich
¬¬ANALISIS PEMBOROSAN PEMBUATAN SELUBUNG ROLL MILL PADA STASIUN PENGECORAN PT BOMA BISMA INDRA (PERSERO) PASURUAN MELALUI IMPLEMENTASI CRITICAL PATH METHOD (CPM) Faizatul Islamiyah; Dwi Djumhariyanto
ROTOR Vol 7 No 2 (2014)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (159.849 KB)

Abstract

Critical Path Method is one of the network analysis methods are used to plan , schedule and monitor the project . Network consists of EET, LET, and  float . Critical activities are activities that dont have the free time ( float = 0 ) so there should not be delayed,  because it will affect the completion time  of project This study aims to analyze the critical path of the project of making roll mill sheaths , identify waste and its cause on critical activities , and make network 's proposal to shorten the project completion time. Based on the research results, the highest score of waste iswaiting, this cause has22.43% score.This waste caused by the delay of material coming , waiting for the previous process, a limited quantity of machines and the operators is limited . After analysis using CPM method and create diagrams of network proposal,the result is production of 4 units roll mill which previously lasted 7 days can be shortened to 6 days with a critical path which must get special attention because if there is  delay in process it will affect to the other working processes which led to the delay in completion of the project. Keywords: Critical Path, EET, LET,
Pengaruh Variasi Fraksi Volume Filler Terhadap Kekuatan Mekanik Komposit Sandwich Polyester Serat Kenaf Core Styrofoam Aman Sentosa; Sumarji Sumarji; Dwi Djumhariyanto
ROTOR Vol 8 No 2 (2015)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.781 KB)

Abstract

Composite sandwich reinforcement  kenaf fiber polyester with Styrofoam core is an alternative material that has the potential to be developed as an application in various fields with an excess of nature that is strong, lightweight, rigid, able to withstand bending loads, impact, vibration damping and sound. This study is intended to overcome the problems of fishermen Muncar - Banyuwangi in the selection of materials manufacture of safe fish robust and insulated to preserve or maintain the freshness of the fish catch of fishermen low temperature. This study was conducted to determine the effect of variations in fiber volume fraction of the increase in impact strength and bending composite materials sandwich.Untuk get impact strength values ​​using the tool impact test with a maximum capacity of 300 joules specifications, pendulum mass of 20.9 kg, 0.83 m long pendulum arm, while to obtain bending strength values ​​using a universal testing machine capacity of 300 KN. Variations were used in this study is the percentage of fiber volume fraction of 10% fiber, 20%, 30%, and 40%. The results showed that the variation of fiber volume fraction of 40% had values ​​higher impact strength and bending of 0.30 Joules / mm² and 5,65MPa than the fiber volume fraction of 10% has impact and bending strength values ​​were lower at 0.14 joules / mm2 and 0.30 MPa. So in this study limits the variation of fiber volume fraction of 10% to 40% proved that if the greater the percentage of fiber volume fraction value will increase the value of impact strength and bending in composite sandwich. Keywords: fiber volume fraction, impact strength and bending, composite sandwich
RANCANG BANGUN FLEXY BIKE SEBAGAI ALAT TRANSPORTASI ALTERNATIF KELUARGA INDONESIA Dwi Djumhariyanto
ROTOR Vol 6 No 2 (2013)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (156.513 KB)

Abstract

Bicycle (human powered vehicles) is very popular transportation appliance in society, with all excess and its insuffiency. Design bicycle specially form and its size measure adapted for ergonomi of body  human being with the certain age, its meaning minibike just to children, while big bicycle just to adult or child with the high body. So that is not rarely met, at one particular family own some bicycle type, as according to its wearer. as a result required a broader place many for the menyimpan of bicycle. This matter enough become the big problem in cities, where farm for the house of progressively narrow. To finish the problem, this research designed and made by a bicycle which can be used by all age (except baby), the bicycle Flexy Bike. Flexy Bike is bicycle having function fleksible. That is bicycle which can be functioned in so many form and size measure, without lessening security and its freshment. Others, Flexy Bike designed to can be folded, so that earn easily kept without requiring wide place. Keywords: bicycle, scheme, flexible and Flexy Bike
ANALISIS PENENTUAN PRIORITAS VARIABEL KLASTER INDUSTRI GENTENG UNTUK PENYUSUNAN STRATEGI PENGEMBANGAN KLASTER DENGAN MENGGUNAKAN ANALISA FAKTOR (STUDI KASUS INDUSTRI GENTENG DI KAB. JEMBER) Dwi Djumhariyanto
ROTOR Vol 4 No 1 (2011)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (116.011 KB)

Abstract

The presence of roof tile companies in Tamansari - Wuluhan - Jember has not shown the existence of synergies between companies and with other elements in order to improve innovation and business efficiency. This was reflected in most of the production process to the marketing of roof tile products that are still performed as an individual company. In other words, the concentration of roof tile companies in Tamansari stopped only to the extent of an industrial roof tile. Whereas, by making a group of roof tile companies in a certain area allows for collaboration between companies as well as with other elements in these area to improve business efficiency as well as the creation of a new innovation related to the roof tile industry. This researh aimed at identifying cluster variables of roof tile industry that will provide competitive advantage for the roof tile industry, and determine the cluster variables priorities that can be used as a reference to arrange a cluster development strategy in the future. Determination of the cluster variables based on the concept of Porter's Diamond Model. Roof tile industry cluster variables identified are: The Quality of Labor, Capital Access, Transportation Facilities, Telecommunication Facilities, Excellent Quality of Roof Tile, Suppliers Companies, Industrial Equipment Provider Companies, Roof Tile Buyer Companies, Financial Institutions, Transportation Companies, Distributors of Roof Tile Companies, Roof Tile Business Associations, Companies Strategy, Organizational Structure, Similar Companies, Job Training Centers, Universities, Corporate Tax, Legal and Quality Standards. Determination of the cluster variable priority to cluster development strategy using factor analysis, with the following results: Related and Supporting Industries Factor with variables as follow: Suppliers Companies, Industrial Equipm[1]ent Provider Companies, Roof Tile Consumer Companies, Financial Institutions, Transportation Companies, Roof Tile Distribution Companies, Roof Tile Business Associations; Factor Condition Factor with variables as follow: The Quality of Labor, Capital Access, Transportation Facilities, Telecommunication Facilities; The Role of Government Factor with variables: Employment Training Centers, Universities, Corporate Tax, Legal and Quality Standards; and Firm Strategy, Structure and Rivalry Factor which the variables: Companies Strategy, Organizational Structure, Similar Companies. Keywords: competitiveness, diamond model, industrial cluster,  small and medium enterpris 1 Staf Pengajar Jurusan Teknik Mesin Fakultas Teknik Universitas Jember  
Co-Authors Agung Eko Hadiyoto, Agung Eko Agus Triono Ahmad Adib Rosyadi Ahmad Khoirul Anwar Ahmad Syuhri Ahmad Wafi Al Wafi, Adib Alfariz, Mohammad Rifqy Alfredo Bayu Satriya Aman Sentosa Aman Sentosa, Aman Andi Sanata Andika Wahyu Prasanko Anuary Dwi Rosyid, Wafa Prasetia Arif Bigwanto Aris Zainul Muttaqin Arya Ramadhanu Arya Ramadhanu, Arya Bambang Sugiharto Danang Yudistiro Danang Yudistiro, Danang Yudistiro Dedi Dwilaksana Digdo Listyadi, Digdo Dwi Rizky Fitria Elhamzah, Denaldy Elza Setya Faizatul Islamiyah Faizatul Islamiyah, Faizatul Freitas, Domingos de Sousa Gaguk Jatisukamto Ghaffar, Jakfat Maulid Hari Arbiantara Hari Arbiantara Basuki Hari Arbiantara, Hari Haris Dwi Armyanto Hary Sutjahjono Ibnu, Muhammad Khadafi Ilminafik, Nasrul Imam Sholahuddin Intan Hardiatama khoirul fahmi aziz L Rajeshkumar M Arief Hidayat M Arif Wibowo M Dimyati Nashrullah M. R. M. Asyraf Mahros Darsin Mochamad Asrofi Mochamad Edoward Ramadhan Mochamad Trifiananto Muhammad Hafri Evan Tofianto Muhammad Trifiananto Nasrul Ilminafik Nasrul Ilminnafik Nugraha, Raafi Aditya Nur Koyim Kustanto Oktafian Nanda Nusila Pratama, Aly Wafa R. A. Ilyas Rahma Rei Sakura Reza Marinanda Fajar Ridho Unggul Nur Rahmadi Ririn Endah Badriani, Ririn Endah Rizal, Ahmad Ayyub Syaiful Robertoes Koekoeh Koentjoro Wibowo Robertus Sidartawan Rossy, Rio Martha Febriana Rudi Sugara, Imam Salahuddin Junus Salmansyah, Dathantara Santoso Mulyadi Setiawan Okik Aris Sumarji Susanti, Rizqa Putri Syahriza, Mochamad Rifki Triana Lindriati Wibowo, M Arif Wibowo, Robertoes Koekoeh Koentjoro Widjonarko Yahya, Hafiz Indratma Yuni Hermawan