Wyniki wyszukiwania - Biblioteka Nauki

1

Disassembly and aggregation in computer aided overhaul preparation

100%

Janik W. , Gendarz P.

Journal of Achievements in Materials and Manufacturing Engineering

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2011

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tom Vol. 44, nr 2

187--197

EN

Purpose: Disassembly and aggregation procedures are main aspects of an overhaul process. The paper presents the example of an application that solves automation of technical mean recirculation procedures. Automation in the aspect of overhaul process preparation should be obtained through new tools specially oriented to refurbish mechanically used or damaged components. Design/methodology/approach: Methodology is based on complex overhaul process analysis that conclude technical mean recirculation method. This method brings technical mean back to operation with procedures (like: disassembly, aggregation, examination, preparation of refurbishing technology, overhaul process report generation) determined in specific order. Findings Method of technical mean refurbishing with computer aid application. Proposition of automation in aspects of: disassembly (disassembly correct sequence) and aggregation procedures (which elements should be examined). Research limitations/implications: Important limitations are: disassembly based on assembly order, automation widest range possible when disassembly and aggregation is based on existing documentation. Aggregation algorithm based on machined type of elements. Practical implicatioii: Nowadays overhaul processes are based directly in most cases on leading technologist experience. Elaborated method and application leads to more objective solutions (decisions) based on algorithms results. Originality/value CAO is an original and new approach that should be considered especially in heavy industry. Nowadays subjective decisions about how to refurbish in overhaul processes could be replaced by automated computer aided solutions. Positive economic impact to future and present overhaul processes execution in industry.

2

Computer aided overhaul with the expert system application - the disassembly module

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Janik W.

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tom nr 2

151-158

EN

The Paper presents the disassembly module. The module is an integral part of expert system that is partial implementation of the Technical Mean Recirculation Method (TMRM). The Disassembly module is divided to two separate sub-modules like: Structure and Sequence. The Structure sub-module is used to input technical mean structure and joins (connection character joins), between elements. In the Sequence sub-module the syndrome identify tag is created to which mechanically used and damaged elements are assigned. As result of gained data algorithm analysis, automatically the disassembly documentation is generated with rule of minimal disassembly range taken in consideration. User have also possibility to modify the operation contents or prepare a sequence manually.

3

Computer aided overhaul with the expert system application - the agreggation module

100%

Janik W.

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tom nr 2

159-164

EN

The paper presents aggregation module and the author's Interchangeable Refurbishment Method (IRM). The aggregation module is an integral part of expert system that aid the overhaul process preparation. By operation oriented to the abstracts (technical documentation, structure, symptoms and list of damaged or mechanically used elements) reveals possibility of estimation: which elements should be replaced and which should be examined. Next the Interchangeable Refurbishing Method is proposed, in which mechanically used or damaged elements assigned to syndrome are replaced, by what time for further examination and refurbishment is simultaneously gained. Furthermore with provided aggregation, assignment of element a copy is possible and placement of that copy. The Aggregation module by automatically assignment of elements to replacement or further examination, improve stage of initial decision in the author's Technical Mean Recirculation Method (TMRM). The Aggregation is based on data gained form technical documentation, what are: element complexity, mass and joins quantity. Relative cost based on results is determined.

4

Aircraft engine overhaul demand forecasting using ANN

84%

Kozik P. , Sęp J.

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tom Vol. 3, No. 2

21-26

EN

Due to the unpredictable nature for aircraft maintenance repair parts demand, MRO (Maintenance, Repair, Overhaul) business perceive difficulties in forecasting and are currently looking for a superior forecasting solution. This paper deals with techniques applicable to predicting spare part demand replacement during helicopter PZL 10W engine overhaul - operating according to hard - time. The experimental results show new forecasting method based on hard - time as the predicted time of required demand and ANN technique as forecasting models predicted numbers of spare parts. The evolution for a new forecasting method, which will be a predictive error-forecasting model which compares and evaluates forecasting methods, based on their factor levels when faced with intermittent demand show as possibility of big changes in MRO lean manufacturing. The results confirm the continued superiority of the new method, whereas, most commonly leveraged methods such as moving average used by MRO business are found to be questionable, and consistently producing poor forecasting performance.

5

Zasady prowadzenia napraw i remontów urządzeń przeznaczonych do stosowania w atmosferach wybuchowych w aspekcie bezpieczeństwa

84%

Figiel A.

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2018

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tom R. 36, nr 3

81--88

PL

W artykule zaprezentowano zasady prowadzenia napraw i remontów urządzeń przeznaczonych do stosowania w atmosferach wybuchowych. Na podstawie analizy aktów prawnych i dokumentów normalizacyjnych wskazano na kluczowe zagadnienia dotyczące napraw i remontów w aspekcie zapewnienia bezpieczeństwa i zgodności naprawianych i remontowanych urządzeń z dokumentacją producenta lub wymaganiami norm. Dokonano przeglądu wymagań, jakie muszą spełnić zakłady naprawcze, zwracając w szczególności uwagę na konieczność wdrożenia i stosowania systemu zarządzania jakością ISO 9001. Omówiono również zasady przeprowadzania oceny zdolności remontowej przez Zakład Badań Atestacyjnych Jednostkę Certyfikującą, w tym kryteria uzyskiwania prawa do posługiwania się zastrzeżonym znakiem KOMAG „Potwierdzona zdolność remontowa”.

EN

The article presents the procedures for repairing and overhauling the devices intended to be used in a potentially explosive atmosphere. Based on the analysis of legal acts and standardization documents, key issues related to repairs and repairs were identified in the aspect of ensuring safety and compliance of the repaired and overhauled devices with producer's documentation or requirements of standards. The requirements to be met by repair shops are reviewed, paying a special attention to the necessity of implementation and applying the ISO 9001 quality management system. The principles of assessing the repair capacity conducted by the Division of Attestation Tests, Certifying Body is also discussed, including the criteria for getting the right to use the KOMAG trademark "Confirmed overhaul ability".

6

Refurbishing technologies of hydraulic actuators applied in mining industry

84%

Gendarz P. , Janik W.

Journal of Achievements in Materials and Manufacturing Engineering

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2010

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tom Vol. 41, nr 1-2

104-111

EN

Purpose: of this paper: Mainly, future design and manufacturing processes should be oriented to refurbishing and overhaul, such as mining machines, hydraulics, military industry, heavy industry products, etc.. This paper shows method which can improve indirectly profitability also in environment protection area. Design/methodology/approach: Methodology that solves refurbishing and overhaul problem of application, is based on CAD/CAM integration, and predicts possibility to even prepare design for refurbishing. With help of reverse engineering techniques, also exist approach to refurbish elements that has no overhaul documentation prepared before. Findings: Preparation of overhaul documentation for families of constructions, should be computer aided with use of prepared dedicated software. Time need to prepare refurbishing technology, can be considerably reduced. Research limitations/implications: Refurbishing and overhaul in existence cycle of product should have same rights as technology or design processes. Future development of new refurbishing technologies should be prepared in software combined with CAD/CAM modules used in advanced CAE programs. Practical implications: Mining industry after possible initiate refurbishing methods, can extend exploit time of exerted machines. Simultaneously producers of mining machines and equipment, after bringing in design for refurbishing strategy in to production, can enhance economical profits from maintenance and service time prolongation. Originality/value: For last twenty years no development in area of patents were noticed. That came with increase of consumption strategy progressed by produces. Presented method solves issues of materials raise in prices and relatively short time of maintenance and service time period. New workstations in industry can be created with application of the method.

7

The nature of the main structural damage in Boeing 737-400 as identified during overhaul type C

67%

Golda P. , Konieczka R.

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2016

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tom z. 90

71--89

EN

In its preliminary part, the article characterises Boeings 737-400 as due to undergo further tests as well as the basic materials used in their construction. It also defines to what extend these materials are prone to damage in the course of their regular use over the planes’ working lives. The object of the analysis is the most prevalent structural damage to the fuselage of the planes discovered during overhaul type C and the definition of the best preventive service. Further on the article categorises the discovered problems and provides their genesis. The main part of the article is devoted to the definition of the sources and reasons for the damage. Consequently, the article forms guidelines how to prevent the occurrence of such and similar damage to the fuselage.

PL

W części wstępnej artykułu zostały scharakteryzowane samoloty typu Boeing 737-400 jako obiekty dalszych badań oraz podstawowe materiały użyte w ich budowie. Jednocześnie określono podatność tych materiałów na uszkodzenia zaistniałe w toku eksploatacji. Przedmiot badań stanowią uszkodzenia strukturalne kadłuba samolotu wykryte podczas przeglądów typu C, jako najbardziej szczegółowych i skutecznych rodzajów obsług. Przedmiotem dalszej analizy są rodzaje wykrytych uszkodzeń strukturalnych kadłuba samolotu oraz ich geneza. Główną część artykułu stanowi określenie źródeł i przyczyn powstania przedmiotowych uszkodzeń. Jednocześnie jest to przesłanka do dalszego określenia właściwej profilaktyki w celu zapobiegania powstawaniu takich i podobnych uszkodzeń samolotu.