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

• Autorzy: Słowik J. , Drotlew A. , Piekarski B.

Identyfikatory

DOI

10.1515/afe-2016-0025

• Języki publikacji: EN

Abstrakty

EN

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 structure.

Słowa kluczowe

EN

castings; innovative foundry technologies; innovative foundry materials; heat treatment; mechanical stresses; grates

PL

odlewy; innowacyjne technologie odlewnicze; innowacyjne materiały odlewnicze; obróbka cieplna; naprężenia mechaniczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 2
• Strony: 51--54
• Opis fizyczny: Bibliogr. 7 poz., rys., tab., wykr.

Twórcy

autor

Słowik J.

• West Pomeranian University of Technology, Szczecin, Al. Piastów 17, 70-310 Szczecin, Poland

autor

Drotlew A.

• West Pomeranian University of Technology, Szczecin, Al. Piastów 17, 70-310 Szczecin, Poland

autor

Piekarski B.

• West Pomeranian University of Technology, Szczecin, Al. Piastów 17, 70-310 Szczecin, Poland

Bibliografia

• [1] Orłoś, Zb. (1991). Thermal stress. Wydawnictwo Naukowe PWN; Warszawa (in Polish).
• [2] Piekarski, B. (2012). Casting from high temperature alloys in furnaces for heat treatment, Wydawnictwo Uczelniane Zachodnio-pomorskiego Uniwersytetu Technologicznego w Szczecinie; Szczecin (in Polish).
• [3] Piekarski, B. & Drotlew, A. (2008). Constructing casts working in the conditions of cyclic temperature changes; Archiwum Technologii Maszyn i Automatyzacji. 28(3). Poznań. (in Polish).
• [4] Bajwoluk, A. & Gutowski, P. (2015). The Effect of Pallet Component Geometry on Temperature Gradient During Cooling; Archives of Foundy Engineering. 1. 5-8.
• [5] Słowik, J., Drotlew, A. & Piekarski, B. (2016). The Flexibility of Pusher Furnace Grate. Archives of Foundry Enginnering. (article accepted for print).
• [6] Piekarski, B. & Drotlew, A. (2010). Cast functional accessories for heat treatment furnaces. Archives of Foundry Enginnering. 4, 183-190.
• [7] Drotlew, A., Garbiak, M., Kubicki, J., Piekarski, B. & Siluk, P. (2013). The construction of the pallet to the basic technological equipment for heat treatment. Prace Instytutu Odlewnictwa. LIII(3), 59-7. (in Polish).

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.