Mechanical Stresses Induced by Compression in Castings of the Load-carrying Grate

Journal title

Archives of Foundry Engineering




No 2

Publication authors


Innovative foundry technologies and materials ; Castings for heat treatment plants ; Grates

Divisions of PAS

Nauki Techniczne


Archives of Foundry Engineering continues the publishing activity started by Foundry Commission of the Polish Academy of Sciences (PAN) in Katowice in 1978. The initiator of it was the first Chairman Professor Dr Eng. Wacław Sakwa – Corresponding Member of PAN, Honorary Doctor of Czestochowa University of Technology and Silesian University of Technology. This periodical first name was „Solidification of Metals and Alloys” , and made possible to publish the results of works achieved in the field of the Basic Problems Research Cooperation. The subject of publications was related to the title of the periodical and concerned widely understand problems of metals and alloys crystallization in a casting mold. In 1978-2000 the 44 issues have been published. Since 2001 the Foundry Commission has had patronage of the annually published “Archives of Foundry” and since 2007 quarterly published “Archives of Foundry Engineering”. Thematic scope includes scientific issues of foundry industry:

  • Theoretical Aspects of Casting Processes,
  • Innovative Foundry Technologies and Materials,
  • Foundry Processes Computer Aiding,
  • Mechanization, Automation and Robotics in Foundry,
  • Transport Systems in Foundry,
  • Castings Quality Management,
  • Environmental Protection.


The main aim of this study was to examine the compression-induced state of stress arising in castings of the guide grates during operation

in pusher-type furnaces for heat treatment. The effect of grate compression is caused by its forced movement in the furnace. The

introduction of flexible segments to the grate structure changes in a significant way the stress distribution, mainly by decreasing its value,

and consequently considerably extends the lifetime of the grates. The stress distribution was examined in the grates with flexible segments

arranged crosswise (normal to the direction of the grate compression) and lengthwise (following the direction of force). A regression

equation was derived to describe the relationship between the stress level in a row of ribs in the grate and the number of flexible segments

of a lengthwise orientation placed in this row. It was found that, regardless of the distribution of the flexible segments in a row, the stress

values were similar in all the ribs included in this row, and in a given row of the ribs/flexible segments a similar state of stress prevailed,

irrespective of the position of this row in the whole structure of the grate and of the number of the ribs/flexible segments introduced

therein. Parts of the grate responsible for the stress transfer were indicated and also parts which play the role of an element bonding the



The Katowice Branch of the Polish Academy of Sciences




Artykuły / Articles


ISSN 2299-2944