Tag Archives: wear.

971–980 R. Chotěborský,, M. Linda and M. Hromasová
Wear and stress analysis of chisel
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Wear and stress analysis of chisel

R. Chotěborský¹,*, M. Linda² and M. Hromasová²

¹ Czech University of Life Sciences, Faculty of Engineering, Department of Material Science and Manufacturing, Kamycka 129, CZ165 21 Prague, Czech Republic
² Czech University of Life Sciences, Faculty of Engineering, Department of Electrical Engineering and Automation, Kamycka 129, CZ165 21 Prague, Czech Republic
*Correspondence: choteborsky@tf.czu.cz

Abstract:

The object of research is stress analysis of worn chisel. The interaction between soil particles and chisel leads to change of shape and dimension of a worn chisel or other agriculture tools. The wear rate depends on the velocity of the chisel in the soil, position in the soil and shape of a chisel. These factors change the dimension and shape of chisel during its service life. The modern chisel includes sintered carbides on a tip. Sintered carbides plates are effective protection for wear resistance. But the body of the chisel is not protected and its wear resistance is lower than the tip. The service life of the tip is much higher than the body of the chisel. Stresses of the body of the chisel are stationary during the service life. The aim of this study is determining of optimising process of the strength of steel for chisels.

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143-150 P. Novák,, M. Müller and P. Hrabě
Research of a material and structural solution in the area of conventional soil processing
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Research of a material and structural solution in the area of conventional soil processing

P. Novák¹,*, M. Müller² and P. Hrabě²

¹Czech University of Life Sciences in Prague, Faculty of Engineering, Department of Agricultural Machines, Kamýcká 129, CZ; *Correspondence: novakpetr@tf.czu.cz 2Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Science

Abstract:

Sustainability in the area of agricultural commodities production depends on soil processing. Ploughshare is one of the most strained parts of a ploughing body and huge requirements are put on it. It has to meet relatively high strength requirements on one hand and high wear resistance on the other hand. The aim of the research is to increase the service life of the ploughing body by means a structural and material solution. Increasing the service life of a ploughshare by means of overlaying is a much discussed topic. The types of overlay materials of carbides (Soudokay A43-0, OK Tubrodur 14.70, OK Tubrodur 15.82) and martensitic (Filarc PZ 6159) were used. Further, new a functional surface was distinguished for reinforcement of the ploughshare cutting edge. A method of size and mass analysis in field tests was chosen for measurements of the ploughshares service life.

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163-170 P. Valášek and M. Brožek Abstract.
Two body abrasion of composites containing filler on the basis of hard cast iron deposits utilisable in agrocomplex
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Two body abrasion of composites containing filler on the basis of hard cast iron deposits utilisable in agrocomplex

P. Valášek* and M. Brožek Abstract.

Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences, Kamýcká ¹²⁹, Praha – ⁶ Suchdol, ¹⁶⁵²¹, Czech Republic; *Correspondence: valasekp@tf.czu.cz

Abstract:

A  row  of  industrial  branches  including  agriculture  requires  materials  resistant  to different  types  of  wear. The  contribution  is  concerned  with  polymeric  particle  composites containing  filler  on  the  basis  of  hard  cast  iron  deposits  chips.  The  interaction  of  polymeric matrix and such  filler creates  wear resistant  material and at the same time  makes possible the low costly recycling of the secondary raw materials. From measured values it is evident that by the addition of hard cast iron deposits chips in the polymeric matrix the sharp increase of wear resistance occurs compared with wear resistance of polymeric material without filler. Such wear resistant composite systems can find utilisation in the agrocomplex field.

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