29 research outputs found

    Researches on Efficiency Increasing Problems for Variable Speed Drive Screw Compressor

    No full text
    Raksts ir vērsts uz šķidrumplūsmas skrūves kompresora darbības efektivitātes analīzi un raksturojošo rādītāju uzlabošanu darbībā ar mainīgu rotora rotācijas ātrum

    Replacement of Processing Methods for Advanced Operations

    No full text
    Raksts ir veltīts materiālu apstrādes veidu savtarpējai aizstāšanai un tās ietekmei uz apstrādāto virsmu kvalitāti, kā arī apstrādāto salāgojamo virsmu ekspluatāciju

    Replacing of Processing Methods for Advanced Operation of Compatible Details

    No full text
    Rakstā ir apskatīti pētījumu rezultāti par beigu apstrādes slīpēšanas procesa aizvietošanu ar virpošanu vai frēzēšanu ar kubiskā bora nitrīda instrumentie

    Design Parameter Effect on Screw Compressor Performance Curves

    No full text
    Design parameter influence on oil flooded screw compresor performance cahracteristic

    Cutting Tool Vibration in the Metal Cutting Process

    No full text
    Research of machining dynamics have longstanding history in manufacturing processes with consideration of cutting interruption, intermittency, and coupled interaction between the tool and workpiece. It gives better understanding of the underlying physics of material removal. The complex motions in cutting dynamics are mainly caused by discontinuities, including chip and tool – piece seizure and complex stick–slip motion. Through the application of discontinuous system theory, a comprehensive understanding of the grazing phenomena is induced by the boundary of frictional-velocity and the loss of contact between the tool- and workpiece are discussed. Significant insights are to control machine – tool vibration and to develop tool wear free machine – tool concept. The experiment on the Stainless steel machining research is shown here and the creation of machine tool vibrations and cutting dynamics is represented in this paper

    Some Cutting Parameter Renovation Aspects for Cutting Tool Materials

    No full text
    Raksts veltīts griezējinstrumentu ģeometrijas parametru atjaunošanas jautājumiem un pareizas instrumentu ģeometrijas nodrošināšanas problēmā

    Comparison of Electromagnetic Pumps with Permanent Magnets with other Electromagnetic Pumps

    No full text
    Many science and technique fields use liquid metals. Every time when it is necessary to operate with liquid metals methods of magneto hydrodynamics (MHD) are the most suitable because liquid metals are good conductors of electricity. Liquid metals can be easily pumped using electromagnetic pumps. Electric current interacts with magnetic field and generates electromagnetic force, which makes liquid metal move. Electric current flows in liquid metal. Therefore electromagnetic pumps do not have direct contact with a pumped medium – there is no need in gaskets, channel of the pump is a hermetic construction. Electromagnetic pumps are used in many fields related with liquid metals. Most important examples are metallurgy and nuclear energetic

    Karstumizturīgo materiālu cilindrisku virsmu apstrāde ar cietsakausējuma griežņiem

    No full text
    Rakstā ir prezentēta karstumnoturīgo tēraudu cilindrisko detaļu apstrādes tehnoloģija pielietojot cietsakausējumu griezējinstrumentus. Apstrādes problēmu risinājumi, apstrādes režīmi, salīdzinājums ar citiem apstrādes veidiem

    Kokapstrādes teorijas un apstrādes variantu izstrāde, izgatavošanas pilnveidošana un kvalitāte

    No full text
    Kokapstrādes teorijas un apstrādes variantu izstrāde, izgatavošanas pilnveidošana un kvalitātes nodrošināšan
    corecore