EVALUATION OF PARTS PRODUCTION QUALITY IN INSTRUMENT-MAKING
Annotation
Subject of Research. The paper presents the parts-making quality criteria and the method of quality determination. Research results on the relationship between production and operational indicators of product quality and the influence of operating conditions on operational performance indicators are presented. Analysis of production quality is carried out for two types of parts of the same product, limiting their service life, by the method of drawing up the quality axis. Method. A quality axis was developed for specification of the product quality and the use of its quality resource. A technique for linking parts and their resource quality to the operational performance of products is presented. The technique is a convenient tool for expressing the production quality coefficient and quality application resource for products and their elements. The ways of efficiency assurance for the use of production quality resources of products in general and their components are proposed. Criteria for reliability stability are proposed for production quality evaluation of batch of products. A quality loop is used for schematic description of the product life cycle. Main Results. A method is presented for identifying rational limiting values of the quality indicators of parts and assemblies at the design stage, as well as a rational combination of the qualities of parts and assemblies in the products during their production. It is revealed that one of the directions for ensuring high efficiency of products in general can be the rational provision and use of resources of the production qualities of their constituent parts. The studies have shown that the standards-compliant operational factors of product quality do not always reflect the change in the main technological indicator, for example, the standard deviation of a significant size that affects the quality of this product. It is accepted that quality is a combination of properties and characteristics of products, which give them the ability to satisfy the consumer’s conditioned needs. Practical Relevance. Analytical expressions and methods are given for determining the production quality coefficient for various options of the upper quality limit assurance, when the operational quality of parts is limited by the accuracy of surface dimensions. The quality coefficient for evaluation and comparison of the quality of parts is given.
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