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All Journal ASEAN Journal of Systems Engineering Majalah Forum Teknik UGM Jurnal Rekayasa Mesin KACANEGARA Jurnal Pengabdian pada Masyarakat Infotekmesin
Suryo Darmo
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Computer Science & IT Education Electrical & Electronics Engineering Engineering Mechanical Engineering

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PENGARUH LEBAR SUDU TERHADAP KINERJA TURBIN VORTEKS Yusuf Randabunga; Adhy Kurniawan; Suryo Darmo
ASEAN Journal of Systems Engineering Vol 2, No 1 (2014): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Abstract

Vortex turbine is the one of turbines which meets those criteria. This turbine utilizes kinetic energy of vortex water and converts it into a shaft power. The objectives of this research were to obtain the torque that could be generated from the vortex  turbine by varying the width of turbine blades and to know  the output  power also the optimum efficiency obtained from this variation. This research was conducted by  using vortex pool in a laboratory scale with a diameter of 108 cm and 6 turbine blades on permanent rotation at 50 rpm, 60 rpm, and 70 rpm. Turbine blades were made from flat rectangular steel with a length of 40 cm sized 1/6, 2/6, 3/6, 4/6 and 5/6 times to radius of vortex pool.The results of the research showed the torque as 1.40 Nm at rotation is 50 rpm. The maximum power is obtained from blade with width of 3/6 times  radius of the pool, that is  8.60 Watts at head 0.362 m and discharge 11.83  l/s or  0.01183 m3/s at rotaion shaft is 70 rpm. This experiment also generated and turbine efficiency of 16.46% at rotation of shaft is 70 rpm.
Pengembangan Metode Pembuatan Molding Injeksi Plastik dari Serbuk Komposit Suryo Darmo
Forum Teknik Vol 36, No 1 (2015)
Publisher : Faculty of Engineering, Universitas Gadjah Mada

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Abstract

Aluminium-particulate glass matrices composites generally use the pressure in the making of green parts/green specimens before heating at sintering temperature.The purpose of this research is to develop the glass composites that it can be used as a material for indirect layer manufacturing, especially used for making plastic injection mold/insert mold. To achieve these goals, the flexural strength and dimensional errors were studied.Starting materials consist of the mixture of glass powders, aluminium powders, and acrylic powders in the volume ratio of 1 : 1 : 1. The glass powders and aluminium powders wererecovered from waste materials. The size of acrylics and glass particles was lower than 0.074 mm and aluminium particles size was lower than 0.297 mm respectively. Green specimens were made by using indirect layer manufacturing processes, while sintered specimens obtained by heating the green specimens in a furnace at a temperature of 700°C for 1 hour. Finished specimens were made by impregnation process of sintered specimens using epoxy resin.The bending strength of green specimens, sintered specimens, and finished specimens is 20 kg/cm2, 80 kg/cm2, and 170 kg/cm2 respectively. Maximum dimensional error of green specimens and sintered specimens is 50% and 40% respectively. Insert mold made by indirect layer manufacturing is broken after producing as many as 120 pieces of plastic products.Keywords: glass matrix composite, insert mold, dimensional error, bending strength.
APLIKASI TEKNOLOGI 3D PRINTER DALAM RANGKA PENGEMBANGAN PEMBUATAN KOMPONEN MINIATUR DI KARANG TARUNA DUSUN BENDUNGAN Braam Delfian Prihadianto; Suryo Darmo
KACANEGARA Jurnal Pengabdian pada Masyarakat Vol 4, No 1 (2021): Januari
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/kacanegara.v4i1.739

Abstract

Replica is an imitation of an object in a size that is greatly reduced by the level of precision and detail that resembles the original object. One of the replica commonly made is a replica of transportation, especially buses, and one of the producers is Karang Taruna Dusun Bendungan, which is located in Karangmojo Subdistrict, Gunung Kidul District. Making replica so far has been done manually by relying on the cutter as a forming tool. In making manuals there are several obstacles faced, namely difficulties when making molds which include cowl molds, seat molds, AC cover molds and other parts. In addition, making miniature manually has disadvantages such as not being precise in shape and size with the original object and if there is a small change in a particular part, then it must be made from scratch again. Based on these constraints the team provided a solution by making a 3D printer machine that could be used to support bus replica production. Making a 3D printer machine with dimensions of 48 x 46 x 44 cm got a positive response.  In addition, the conducted training were enthusistically participated by the members. Utilization of 3D printer machines greatly helps the production process and increases the efficiency of time by 76% at the stage of making master prints.
Analisis Kegagalan Poros Track Roller Bearing pada Mesin Pembelah Bambu Satiti, Nareswari Novita; Krisnaputra, Radhian; Sugiyanto, Sugiyanto; Hendaryanto, Ignatius Aris; Irawati, Inggar Septhia; Darmo, Suryo; Setiawan, Widia
Jurnal Rekayasa Mesin Vol 18, No 2 (2023): Volume 18, Nomor 2, Agustus 2023
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v18i2.4334

Abstract

Splitting merupakan salah satu tahapan proses produksi bambu laminasi. Splitting dilakukan dengan mesin pembelah bambu untuk mengubah batang bambu menjadi bilah-bilah bambu. Dalam proses splitting, komponen booster bergerak maju-mundur di sepanjang rel untuk mendorong bambu yang terletak pada bagian penopang sampai ujung bambu bertumbukan dengan pisau pembelah sehingga batang bambu terbelah menjadi bilah-bilah (bamboo strips). Pada mesin pembelah bambu terdapat track roller bearing yang berfungsi sebagai guide roller. Salah satu komponen penting dalam rangkaian track roller bearing adalah poros. Kasus kegagalan komponen berupa patahnya poros track roller bearing telah dijumpai pada mesin pembelah bambu yang terdapat di sentra kerajinan bambu, Rosse Bambu Yogyakarta. Kerusakan komponen mesin tentu menghambat berjalannya proses produksi bambu laminasi, oleh sebab itu dilakukan analisis kegagalan dalam penelitian ini dengan tujuan untuk mengetahui faktor penyebab kegagalan yang dialami oleh poros track roller bearing pada mesin pembelah bambu sekaligus sebagai upaya antisipasi untuk menghindari terjadinya kasus kegagalan yang serupa. Analisis kegagalan dilakukan dengan melakukan pengujian komposisi kimia material dengan metode Atomic Emission Spectroscopy (AES), pengamatan visual dan pengamatan skala makro terhadap permukaan patahan yang terbentuk, pengujian metalografi untuk mengetahui struktur mikro material poros track roller bearing yang patah, dan pengujian kekerasan Vickers. Permukaan patahan poros tampak terang dan berbentuk granular menunjukkan karakteristik patah getas. Hasil analisis menunjukkan bahwa material poros terbuat dari baja karbon tinggi AISI 1080 yang telah menerima perlakuan quenching dengan nilai kekerasan material sebesar 311,59 HV sehingga material bersifat keras dan getas. Sifat tersebut mengakibatkan poros tidak mampu menahan beban kejut yang diterima saat proses pembelahan bambu berlangsung. Kesimpulan yang diperoleh yaitu kegagalan yang terjadi disebabkan oleh faktor pemilihan material dan perlakuan panas yang dilakukan tidak sesuai untuk aplikasi poros track roller bearing pada mesin pembelah bambu.
Analisis Kekuatan Tarik dan Regangan Filamen Carbon Fiber Hasil 3D Print dengan Variasi Fill Density Braam Delfian Prihadianto; Suryo Darmo; Dani Anggoro Hasan; Dovan Ndaru Ananda
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.v14i2.1936

Abstract

Mechanical properties problems that are closely related to the strength of 3D printed products generally occur during the development of 3D printing machines, In which several components used are the results of additive manufacturing technology. The damages generally occur in the components that receive force and the damage is in the form of cracks and fractures. The focus of this study is to determine the effects of increasing the value of fill density on mechanical properties, especially tensile strength and strain with carbon fiber filament material. This study used an experimental method using two types of filament material: nylon carbon fiber and PLA carbon fiber with a diameter of 1.75 mm for each filament and a recommended printing temperature of 190-260°C. Both types of filaments were printed using a direct extruder type 3D printing machine with a build size of 180 mm x 180 mm x 180 mm and printing was carried out at atmospheric pressure and a horizontal printing area. The Universal Testing Machine carried out mechanical properties testing implementation related to tensile strength and strain. Based on the results of experiments and tests that have been carried out, the strain values ​​are 16.970 – 26.681% and the tensile strength is 19.244 – 23.899 MPa for nylon carbon fiber filament material. Whereas the PLA carbon fiber filament material, the strain value is 7.673 – 15.546%, and the tensile strength is 18.580 – 24.552 MPa. Therefore, based on the test results, it is known that the fill density parameter value has an influence on the strain value and tensile strength so that it can be used as a reference in setting machining parameters.
Co-Authors Adhy Kurniawan Artanto, Aditya Widhi Dani Anggoro Hasan Dovan Ndaru Ananda Hendaryanto, Ignatius Aris Irawati, Inggar Septhia Krisnaputra, Radhian Prihadianto, Braam Delfian Satiti, Nareswari Novita Setiawan, Widia Sugiyanto - Yusuf Randabunga