Wyniki wyszukiwania - BazTech

1

Static condensation in modeling roller guides with preload

Dunaj Paweł, Berczyński Stefan, Pawełko Piotr, Grządziel Zenon, Chodźko Marcin

Archives of Civil and Mechanical Engineering

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2019

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Vol. 19, no. 4

1072--1082

EN

This article presents the methodology for modeling the stiffness of a machine tool load-bearing system using the finite element method. A new, simplified model of stiffness of the linear guide with a preload based on equivalent contact model was proposed. An equivalent contract model was developed where the ball was replaced with four rod elements of equivalent stiffness, interconnecting the opposite ends of the face of cuboidal finite ele- ments. To shorten the computation time and facilitate modeling reduction and substructur-ing methods was used. The accuracy of the proposed model was compared with experimental results. In addition, the computation times were evaluated by comparing the simplified model with the full model and other equivalent models. Then, the model was used to determine the stiffness of the machine load-bearing system on the example of a machining table using the aforementioned methods and the obtained results were com-pared in terms of accuracy (less than 1% difference in maximum displacement value) and computation time with the classic approach (up to 97% in time reduction). This paper demonstrated the validity of the proposed model, allowing accurate and fast determination of the stiffness of machine tool load-bearing system.

2

Modeling roller guides with preload

Pawełko P., Berczyński S., Grządziel Z.

Archives of Civil and Mechanical Engineering

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2014

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Vol. 14, no. 4

691--699

EN

This article presents the methodological basis and methods of modeling roller guides, which consist of a carriage and profiled guide rail with introduced preload. It also discusses modeling methods with various degrees of simplification and selected results of numerical analyses concerning the examined guides. The applied methods of modeling are then assessed in terms of their effectiveness.

3

Experimental research on the static properties of rolling guideway subassemblies.

Jastrzębski D., Pawełko P., Skrodzewicz J., Szwengier G.

Advances in Manufacturing Science and Technology

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2007

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Vol. 31, nr 1

5-17

EN

The paper presents a methodological basis and an experimental method of determining static properties of subassemblies, such as sliding block and profiled guide rail. It also includes a description of a prototype of a test stand which was first designed and later produced. The authors demonstrate the results of their experiments carried out on some selected guideway subassemblies. The paper also contains an assessment of the examinations.

PL

W artykule przedstawiono podstawy metodyczne i sposób realizacji doświadczalnego wyznaczania właściwości statycznych podzespołów typu wózek toczny - profilowana szyna prowadząca. Zaprojektowano i zrealizowano technicznie prototyp stanowiska badawczego. Omówiono wybrane wyniki wykonanych badań wybranych podzespołów prowadnicowych i przeprowadzono ich analizę.