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Gendarz P., Rząsiński R., Rabsztyn D.

Journal of Achievements in Materials and Manufacturing Engineering

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2014

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Vol. 63, nr 1

19--29

EN

Purpose: Theory of construction similarity has its roots in the theory of physical similarity. The model in the theory of construction similarity is a model construction. Model in the theory of similarity of construction and technology is construction and technology standard. Design/methodology/approach: The fundamental aim of the work is the selection of design features in particular type sizes of series of types that allows obtaining physical, stereomechanical and simple states that are identical as in the model construction. The basic form of the record of series of construction types is program and relation parameterization. Features are determined for the items stored in the form of series of construction and technology types. Research limitations/implications: Analysed methods develop algorithmisation of engineers and technologists environment and support integration with the process of preparation the production. Practical implications: Described methods were being developed on practical examples of creating the series of types of hydraulic cylinders used in mining. Originality/value: Method of the constructional similarity, technological similarity presented in the paper are basis of selection of design features in the process of series of types and module systems of constructions and technology creating. All of these methods support intensive development of the types of technical features and affect on their competitive on the ready market.

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Technological operators of series of types technology creating

Rząsiński R., Gendarz P.

Journal of Achievements in Materials and Manufacturing Engineering

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2010

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Vol. 41, nr 1-2

155-163

EN

Purpose: The result of this paper is verification of relation between constructional features and technological features. The basic tool of the series of types of technologies creating is algorithmic method. The worked out datum of these methods is already elaborated ordered families of construction in form of series of types or modular series of elements construction. Design/methodology/approach: This paper shows algorithmic understanding of getting input data in the process of technology creating based on data of construction. Basic tool of realization of data selection for the process of manufacture is algorithmic method and use of advanced graphic programme. Findings: The basic result of the analyzed problem is the realization of relations between construction and technology for specified series of types of elements of machine engines. Moreover the algorithmic method with its essential constituents which determine input date of algorithmization of processes of selection of technological features on bases of constructional features was introduced. Research limitations/implications: Analyzed methods develop algorithmization of designing environment and support integration with the prepare production process (relational databases, theory of automatic classification). Practical implications: Described methods were developed on practical examples of creating the technological module systems of hydraulic cylinders used in mining, slag cars used in metallurgy and gears series of types The represented methods are applied for the series of type of units of servo-motors hydraulic practical in mining. Originality/value: Algorithmic method and CAM method are basis for selection of technological features in the process of already ordered technology families creating. This method is characterized with possibility of shortening time connected with preparation of manufacture.

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Cost calculation of constructions series of types

Gendarz P., Cielniak M.

Journal of Achievements in Materials and Manufacturing Engineering

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2010

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Vol. 40, nr 1

58-65

EN

Purpose: The main aim of research was to elaborate methods to estimate costs in construction series of types production process. Design/methodology/approach: Based on manufacturing cost of one element it is possible to determine cost of other elements belonged to the same construction series of types. The four main cost estimating methods were distinguished. The first method is feature-based. The technological operations are dedicated to specified pieces of element. Cost manufacturing of every piece is specified. Based on elementary costs the manufacturing cost of whole part is calculated. The second method uses construction similarity theory. The selected part manufacturing costs are functionally depended on main part manufacturing costs. The CAM method is based on time calculation from manufacturing process simulation. The simplified method uses normalized masses of analyzed parts pieces. The balance coefficients of those pieces are specified. Findings: Manufacturing cost estimation methods were analyzed. Those methods are based on construction and manufacturing technology. The main conclusion is that CAM method is most accurate. Research limitations/implications: The CAM method is limited to analyze only manufacturing process based on numerically controlled machines. The Feature-based method require developed database for analyzed part family. Practical implications: Presented method was applied in hydraulic props manufacturing cost analysis. Originality/value: Described analysis puts together and compares different cost estimating methods which allows choosing most suitable method for analyzed manufacturing process.