scholarly journals Scenarios for the Development of Platform-Based Networks for Additive Spare Part Production

Author(s):  
Jana Frank ◽  
Philipp Jussen ◽  
Lennard Holst ◽  
Timo Lütke Meyring
Keyword(s):  
Author(s):  
Khawarita Siregar ◽  
Farida Ariani ◽  
Mangara M Tambunan

Author(s):  
Dirks Sebastian ◽  
Henrich Schleifenbaum

Methods for cost calculation of Laser-based Additive Manufacturing (LAM) have evolved over the last two decades. Starting from a rapid prototyping manufacturing method, cost calculation over time included more than single part production for small series or mixed batches. New machine developments nowadays aim at large scale production and introduce modular machine designs that give LAM factory operators more decision freedom on machine configurations and expansibility. To leverage this new possibilities, LAM costing methods must be adapted to calculate and visualize the economic consequences of different module configurations.In this work a modelling architecture of L-PBF machines using virtual modules is presented. Using principles of the industry 4.0 communication standard OPC UA, a virtual machine is set up, parametrized and connected to the AM digital process chain. Two different views on the cost information are used, optimized for different use cases.First, the product view allows detailed analysis of cost allocation to parts in mixed batches and the layered geometry of the part. Second, the machine view tracks utilization of all machine modules, divided into the states idle, active, off and maintenance. The theoretical Overall Equipment Effectiveness (OEE) is calculated on a module basis, enabling economic analysis and optimization of module composition as well as module improvements and new modular machine constellations. This allows focusing research and development on most valuable improvements. By calculating different scenarios like spare part production, mass production or rapid prototyping, the part portfolio to be manufactured can be considered.


2020 ◽  
Vol 2 (1) ◽  
pp. 197-202
Author(s):  
Rudiana ◽  
Rr. Retno Safitri ◽  
Retno Junita

Sekoci merupakan alat penolong yang dapat digunakan untuk evakuasi seluruh awak kapal karena memiliki konstruksi yang lebih kuat dari alat penolong lainnya. Masalah yang sering terjadi adalah kurang terampilnya ABK tentang perawatan dan pengoperasian sekoci yang sesuai dengan prosedur dan rendahnya  perawatan sekoci di atas MV Kartini Baruna. Kemudian tujuan penelitian ini yaitu untuk mengetahui penyebab kurang terampilnya ABK tentang perawatan dan pengoperasian sekoci yang sesuai dengan prosedur dan mengetahui penyebab rendahnya  perawatan sekoci di atas MV Kartini Baruna. Metode yang digunakan adalah deskriptif kualitatif. Dari hasil penelitian diperoleh kesimpulan bahwa faktor yang menyebabkan kurang optimalnya kinerja dari sekoci di MV. Kartini Baruna adalah kurangnya spare part, penerapan PMS (Plan Maintenance System) yang tidak sesuai ketentuan, kurang terampilnya anak buah kapal (ABK) dalam pengoperasian sekoci. Faktor yang menyebabkan perawatan lifeboat yang kurang baik terhadap crew di MV. Kartini Baruna adalah lambatnya proses pengoperasian sekoci, membahayakan keselamatan crew diatas kapal. Kemudian upaya yang dilakukan untuk mengoptimalkan perawatan terhadap lifeboat di MV.Kartini Baruna yaitu dengan menerapkan PMS (plan maintenance system) sesuai ketentuan atau panduan


2019 ◽  
Vol 14 (3) ◽  
pp. 219-228 ◽  
Author(s):  
Jingchao Jiang ◽  
Xun Xu ◽  
Jonathan Stringer

2011 ◽  
Vol 473 ◽  
pp. 168-175 ◽  
Author(s):  
Martin Zubeil ◽  
Karl Roll ◽  
Marion Merklein

Roller hemming is usually applied for hang-on-parts such as hoods, doors or trunk-lids which all have complex non-linear geometries. The flange is often hemmed along both surfaces and edges which have 3D curvilinear shapes. Minimization of hemming defects and the requirement to improve cycle time of the roller hemming process are essential for roller hemmed hang-on-parts in the automotive industry. Different systems such as the driven roller hemming provide the possibility to increase the strain rate without loosing surface quality and dimensional stability. Investigating the influence of friction during roller hemming, results will give an understanding of the advantage for mentioned roller hemming systems.


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