Abstract
The study object: group unification of designs of process machines and appliances. Unification is one of important means of improving efficiency of production and operation of assemblies (parts) which reduces cost of their manufacture and repair. Unification is also a standardization subsystem which significantly increases the interest in its study and implementation.One of the problems in development of group unification of designs consists in the lack of sufficient theoretical base and the studies towards unification are often reduced to simplification. This causes worsening of production efficiency because of slowdown of the process of creation and implementation of unified designs at a steady rate of growth of nomenclature of assemblies (parts), equipment and tools.An approach was proposed based on a hypothesis of possibility of finding criteria (formulas) that will allow designers to a priori assess conformity of the design structure to the established levels of unification, define laws and specify methods for optimizing the design structures by adapting to the technological equipment. This approach was implemented through the use of the axiomatic theory, laws of composition, theory of groups and symbolic logic.As a result of the study, definition of the primary element was obtained and a procedure of its construction was presented, formulas of unified parts were derived and the theorem of unification of assembly (part) design structure was formulated. Features of integrated unification of groups of parts and the equipment for their manufacture were considered.The study results will allow designers to improve the intellectual design process and promote widespread use of the systems of automatic design of process equipment. The study results are of interest for:‒ designers of enterprises when creating closed databases of unified parts (assemblies) which will significantly reduce time of development and introduction in manufacture of new products and increase their efficiency;‒ software users in creation of accessible open databases of unified parts (assemblies) aimed at concealed advertising and promotion of sales of unified products
Highlights
Unification of machine and appliance designs is one of important means for improving efficiency of their production and operation
The method makes it possible to change the approach to designing parts, 6/1 ( 102 ) 2019 increase productivity of the designer’s work, facilitate the important process of improving and expanding the ability to use computer aided design (CAD)
Let us formulate the following theorem for designs of the second set taking into account previous results: a machine or an appliance can be designed in such a way (including recomposition of parts) that any part can converge to one type of the primary element with unified changing sections
Summary
Unification of machine and appliance designs is one of important means for improving efficiency of their production and operation. The process of creating unified products has no enough scientific principles and the unification efforts are often reduced to a mere simplification This is the cause of slow creation and implementation of unified designs while the rate of growth of nomenclature of parts and assemblies, rigging and tools does not decrease. Housing of one type of the appliance set was filled to the maximum and the other was half-filled, that is, its size and, cost of materials were excessive. This approach was justified by reduction in manufacturing costs due to the use of relatively simple high-performance process equipment, smaller variety and number of equipment units. It is necessary to solve the problems of obtaining quantitative criteria for a priori assessment of correspondence of machine and appliance designs to established levels of unification, derivation of designing rules, formalization of design unification and its combining with unification of process equipment
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