Wyniki wyszukiwania - BazTech

1

Automatic device with self-braking for fixation objects in executive links of technological equipment

Prydalnyi Borys

Acta Mechanica et Automatica

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2025

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Vol. 19, no. 1

7--14

EN

The main characteristics of a new automatic device for the fixation of objects in executive links of technological equipment, which determine its suitability for use, are considered. The device is based on a new structure that ensures its self-braking after the process of object fixation and increases the reliability of holding the objects, which is especially important in safety-critical applications. The proposed structure can be implemented for use in various types of executive links of technological equipment, and in the paper, it is considered the most complex application of the device—as part of a spindle assembly. For the proposed design, the method of calculating the main parameters of this type of mechanism is presented. Based on the results of the research, analytical and graphical dependencies have been obtained describing the change of the clamping force from 45 to 15 kN when increasing the spindle speed up to 10000 rpm, and the dependence of the clamping force on the torque at the input link. Based on the results of the research, a preliminary conclusion has also been drawn regarding the possibility of using electromechanical clamping mechanisms of the proposed type as a part of spindle units of machine tools, also because the rotor diameter of the mechanism is within 100 mm and the stator is within 200 mm.

2

Accuracy of spindle units with hydrostatic bearings

Fedorynenko D., Sapon S., Boyko S.

Acta Mechanica et Automatica

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2016

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Vol. 10, no. 2

117--124

EN

The work is devoted to the research ofprecision regularities in a spindle unit by the trajectory of the spindle installed on hydrostatic bearings.The mathematical model of trajectories spindle with lumped parameters that allows to define the position of the spindle with regard the simultaneous influence of design parameters, geometrical deviations ofform, temperature deformation bearing surfaces, the random nature of operational parameters and technical loads of hydrostatic bearings has been developed. Based on the results of numerical modeling the influence of shape errors of bearing surface of hydrostatic bearing on the statistical characteristics of the radius vector trajectories of the spindle by varying the values rotational speed of the spindle and oil pressure in front hydrostatic bearing has been developed. The obtained statistical regularities of precision spindle unit have been confirmed experimentally. It has been shown that an effective way to increase the precision of spindle units is to regulate the size of the gap in hydrostatic spindle bearings. The new design of an adjustable hydrostatic bearing, which can improve the accuracy of regulation size gap has been proposed.

3

Aeorostatycznie łożyskowany szybkobieżny zespół wrzecionowy

Lewandowski D.

Pneumatyka

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2006

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nr 3

38-41

PL

W opracowaniu przedstawiono schemat konstrukcyjny badanego zespołu wrzecionowego, opracowany jego model fizyczny, opis matematyczny modelu oraz model symulacyjny. Weryfikację opisu teoretycznego przeprowadzono poprzez porównanie teoretycznych i doświadczalnych charakterystyk amplitudowo-pręd-kościowych oraz trajektorii ruchu końcówki wrzeciona dla wybranych punktów charakterystyki analizowanego zespołu.

EN

The present paper contains a treatment of the existing design solution. The physical and mathematical model of this solution are presented. There is also simulation model developed for this design. Results of theoretical deliberations were confirmed in the experience way.