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Martawirya, Yatna Yuwana
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Mechanical Engineering

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PERANCANGAN BONDING ASSEMBLY JIG Martawirya, Yatna Yuwana; Wirjomartono, Sri Hardjoko; Riptanto, Totok Ary
Mesin Vol 10, No 1&2 (1994)
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Abstract

Sejalan dengan kemajuan teknologi di bidang industri pesawat terbang dan ruang angkasa. saat ini diperlukan material yang memiliki perbandingan kekuatan terhadap berat setinggi mungkin. Salah satu material yang sesuai dengan permintaan ini adalah komposit, yang banyak digunakan dalam struktur pesawat terbang. Komposit merupakan gabungan dari beberapa material yang disatukan pada temperatur dan tekanan tertentu. Proses terakhir ini dinamakan proses curing. dan biasanya dilakukan di dalam autoclaves.Salah satu produk komposit adalah komponen komposit yang terbuat dari Aluminium. Komponen yang dibuat ini harus memenuhi syarat-syarat yang diperlukan pesawat terbang, diantaranya geometri dan stabilitas bentuk yang memenuhi persyaratan. Untuk mendapatkan ini komponen komposit dibuat dengan menggunakan perkakas bantu yaitu bonding tool atau Bonding Assembly Jig (BAJ).Dalam makalah ini akan dibahas perancangan BAJ untuk pembuatan komponen pada sayap pesawat terbang, yailu aft flap assy outboard trailing edge flap wing. Penelitian yang dilakukan bertujuan menentukan performansi dan mengoptimalkan rancangan BAJ . Dari hasil perhitungan diketahui bahwa defleksi sewaktu proses handling sebesar 10,83 mm. lni berarti masih di bawah defleksi yang diijinkan, yaitu 14,96 mm. Allernatif rancangan BAJ 3 dipilih karena mempunyai performansi perpindahan panas yang paling baik.Kata kunci : sunbungan adhesives, perfonnansi kekakuan. performansi perpindahan panas.
An Experimental Verification of a Methodology for Assessing The Energy Performance on Turning Processes Raharno, Sri; Martawirya, Yatna Yuwana; Cipta Wijaya, Jeffry Aditya
Mesin Vol 25, No 2 (2016)
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This paper aimed to experimentally verify the methodology for assessing energy performance of turning processes that had been developed on the prior research. Specific energy consumption is used as the indicator in the process assessment. The experimental verification can be separated into two main steps. The first step is to construct the reference values of specific energy consumption and the second step is to compare the reference values to the specific energy consumption from the assessed process. The reference values were constructed based on the data of specific energy (from experiment) using data envelopment analysis (DEA) method. In this case, MaxDEA Basic 6.6 program has been used to determine the reference values. The experiment was conducted using several lathe machines based on the certain metering strategy. The metering strategy must be determined to maintain the consistency and validity of the process assessment.  After the reference values were constructed, the assessment can be carried out. Energy consumption from the assessed process was measured using power analyzer, and then it was converted into specific energy consumption value according to the material removal rate. Energy reduction score could be calculated based on the distance between the data of specific energy consumption (from the assessed process) and the reference value. The energy performance of the machine is better if the score of energy reduction is lower and nearer to the reference value. The methodology was designed to be as simple as possible in order to be appropriately implemented on the industry, but without reduce the quality of the assessment. shedding. 
MINIATUR SISTEM TRANSFER FLEKSIBEL DENGAN PENGENDALIAN TERDISTRIBUSI MENGGUNAKAN PLC Martawirya, Yatna Yuwana; Kusuma, Akhmad Hery; Pamungkas, Yohanes Kurnia
Mesin Vol 17, No 1 (2002)
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The objective of the present research is to develop a miniature of a module of the Flexible Transfer System (STF). STF is the alternative solution of system transportation in advance manufacturing system environment which considered flexible on its components. The flexibility that can be fulfilled by STF is the flexibility in a route of transportation and the ability to be developed in the future. For these purposes, the control architecture of STF is designed to be distributed and each of the controllers has autonomy to carry out decision making based on its condition. At this research a miniature of STF that consists of a mechanical system module, an executor controller, and a manager controller has been developed, and the communication among the distributed controllers has been carried out and successfully.
SISTEM PRODUKSI TERDISTRIBUSI MANDIRI: PERANGKAT LUNAK INTI PENGEMBANGAN SISTEM PRODUKSI Martawirya, Yatna Yuwana; Setyadi, Rochmad
Mesin Vol 15, No 1 (2000)
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The objective of the present research is to develop an application software called MSC (Manufacturing System Core) which is used as a core in the development of a manufacturing system software. The development of MSC is based on ADiMS (A utonomous Distributed Manufizcturing System). An object-oriented modeling method is adopted to represent the autonomous component of the manufacturing systems. The example of minimum application of MSC and the method of extent are discussed to understand the modularity of MSC. Software development technology applied at MSC are discussed to see the ability of MSC in the data sharing with other application.
PERANCANGAN ALGORITMA PENJADWALAN PEMBUATAN CETAKAN SESUAI DENGAN DUE DATE JADWAL PELEBURAN LOGAM UNTUK MENDUKUNG KONSEP SISTEM PRODUKSI TERDISTRIBUSI MANDIRI ( STUDI KASUS SEKSI FOUNDRY PT. BANINUSA INDONESIA ) Martawirya, Yatna Yuwana; Arthaya, Bagus; Yanni, Yanni
Mesin Vol 17, No 3 (2002)
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Abstract

At this moment, manufacturing industries in Indonesia must have high flexibility that can quickly responds dynamic changes in production processes. Autonomous Distributed Manufacturing System (ADiMS) is one of the production system alternative that can increase system flexibility with ability to adapt dynamic changing condition in the system.ADiMS is a production system where productions elements are independent, which planning process and production control is distributed to each independent element. Each of production’s element has autonomy in running the monitoring, taking the decision, controlling, and communications functions with the other production’s elements. Because each of the production elements take the decision independently, there should be a coordination of decision making result so the conflict will not occur among independent production elements.In this research AdiMS concept is applied in Foundry section at PT. Baninusa Indonesia. The task is to make a sand mold producing schedule based on the schedule of melting of cast iron or cast steel so it can support cast’s order and filling the customer order. This research is done with the help of application program that specialized developed so it is hoped will make results a better scheduling of making sand mold casting.
Co-Authors Bagus Arthaya Cipta Wijaya, Jeffry Aditya Kusuma, Akhmad Hery Pamungkas, Yohanes Kurnia Raharno, Sri Riptanto, Totok Ary Setyadi, Rochmad Wirjomartono, Sri Hardjoko Yanni, Yanni