The work purpose consists in the accuracy increase and assurance of technological equipment manufactured with the wide use of common modules at the expense of the impact of joints contact stiffness. The investigation methods: a theoretical analysis of metal parts contact taking into account their microgeometry, experiments with the use of common modules and means for linear value measurements. The study showed that the value of contact deformations in joints at common modules use is comparable with tolerances for their manufacturing and must be taken into account at the computation of executive dimensions for parts of mating. The existing computations of the value of approach for small areas of a contact have considerable dimensions for which these procedures give large errors. The application extension of ready common modules in the technological equipment structures and in the joints increase requires design procedure corrections. It is necessary to improve the computation pro-cedures for parts contact approach and also the procedures for the formation and computation of complex spatial dimensional chains including contact deformations.

The procedure of continuous computer support in technological assurance of assembly unit quality on the basis of the automated subsystems of a dimensional analysis fulfillment for the main stages of a life cycle allowing the analysis of technological, assembly and operation ties in machinery structure is shown. The scientific approaches to technological assurance of machinery unit life on the basis of the analysis of dimension ties arising at the basic stages of a product life cycle are stated. At the heart of investigations is laid the realization of a continuous analysis of dimensioning ties at the basic stages of a life cycle (designing, manufacturing, assembly and service of a product) combined into a general automated subsystem of engineering computations (MES- system) for assurance of machine life stated in design requirements.

The study objective is the development of devices for high-accuracy machining of machine parts. The problem to which the article is devoted is the analysis of the joint influence of location vees on the accuracy of workpiece locating. Research methods: modeling the contact of the workpiece with the location vees using the theory of dimensional connections, regression analysis of modeling results of installing workpieces in the location vees. The novelty of the work: the formation of the workpiece error of locating when it is installed on a device with two location vees and a random distribution of the accuracy parameters of the base surfaces is considered. Study results: a model of self-installation of the workpiece on two location vees is developed and dependences are obtained for estimating the workpiece error of locating, taking into account the normal distribution of accuracy parameter values within their tolerances. Conclusions: taking into account the probability of distribution of the values of base surface accuracy parameters within the tolerances reduces the values of the workpiece error of locating, which makes it possible to reduce the requirements for the accuracy of the devices reasonably.

Технологическое обеспечение точности и качества поверхностей деталей машин при проектировании маршрутно-операционного технологического процесса методом синтеза на основе анализа размерных связейИзложены основные положения технологического обеспечения точности и качества поверхностей деталей машин на основных этапах жизненного цикла изделия при разработке технологии механической обработки методом автоматизированного генеративного синтеза единичных маршрутных процессов изготовления.Ключевые слова: метод генерации технологических процессов; распознавание поверхностей; технологичность изделий; размерный анализ. Technological support of accuracy and quality of machinery surfaces at designing of route-operation engineering process by synthesis method based on dimensions ties analysisBasic regulations for technological support of accuracy and quality of machinery surfaces at the basic stages of a product life cycle at the development of machining techniques by a method of automated generative synthesis of single route processes of manufacturing are presented.

An impact of different accuracy parameters of supporting prisms used in designs of machine units upon the accuracy of billet installation is considered. As a method for the estimate of installation accuracy a dimension analysis is used. There are shown peculiarities of the technological support of supporting prism accuracy.