54 research outputs found

    Краткий обзор балансирующих устройств активного типа

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    Balancing active type scheme was shown. Self-balancing device's classification was reported. Keynotes were explored of each mechanism. Mechanism's developing was trained to moving time

    ATLAS detector and physics performance: Technical Design Report, 1

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    Prediction of coating's properties after micro-blasting and their effect on the tool's cutting performance

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    The conduct of micro-blasting on PVD films for improving the cutting performance of coated tools is often encountered in industry. In the present paper, the effect of micro-blasting procedures on the film mechanical properties, cutting edge geometry and thus on the tool life is introduced. A novel method for determining coating strength properties gradation after micro-blasting was developed. Ball cratering tests were carried out at the tool flank and rake, near the cutting edge, to detect potential coating thickness change after micro-blasting. Moreover the effect of micro-blasting conditions on the cutting edge geometry was examined by white light scanning and EDX microanalyses. The cutting performance of coated tools subjected to films' micro-blasting was investigated in milling. Finite element method (FEM) supported calculations of the developed temperatures and stresses during material removal contributed for explaining the obtained tool wear results and herewith for optimizing the micro-blasting process

    Western Star, 1912-04-24

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    The Western Star began publication on Newfoundland's west coast on 4 April 1900, appearing weekly with brief semiweekly periods up to 1952, when it became a daily. As of 17 April 2019 it continues as a free weekly community paper

    Complete qualification methodology for coatings of precision glass molding tools

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    Precision glass molding is the technology of choice for the production of complex-shaped optical components. Protective coatings can significantly extend the lifetime of the molding tools, but the coating properties have to be exactly customized for individual application conditions. The current biggest challenge is to ensure the reliability of newly developed coatings without resorting to extensive and expensive practical testing. However, the usual coating qualification methods either cannot be used or don't provide meaningful results. In this work a new three-tier, application-specific methodology for the qualification such coatings is presented. First, the basic characterization of coating properties is discussed, taking into account the specific characteristics of the coatings used for precision glass molding tools. In the second step, application-specific testing methods are devised, based on the analysis of the loads during glass molding. Finally, a new machine for testing the lifetime of the coated molding tools is proposed. Three case studies are presented where nanoscratch, nanoimpact and glass contact tests are performed with Pt-Ir, TiAlN, and CrAlN-coated samples in combination with various glass types, showcasing the usefulness of the proposed three-tier methodology
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