PT Journal
AU Tavodova, M
   Vargova, M
   Krilek, J
   Stancekova, D
TI Analysis of Damaged Delimber Knives and the Possibility of Increasing their Service Life
SO Manufacturing Technology Journal
PY 2022
BP 80
EP 88
VL 22
IS 1
DI 10.21062/mft.2022.011
DE delimber knives; HARDOX 450; microstructure; hard facing; wear
AB The article deals with the wear of the blades of the delimber device of harvester head. An input analysis of the materials of the fixed knife and movable arm parts was performed. It consisted of chemical analysis, evaluation of microstructure and hardness measurement by HRC and HB methods. The original welded joint was analyzed, which ensured the connection of the blade and the fixed, resp. movable arm mechanism. Based on the findings, two blade replacement solutions have been proposed. The first was the application of hard metal by an OK 84.58 electrode and second use HARDOX 450 by welding with a fixed part or a mechanical gripping with screws. This was recommended based on previous research at the Faculty of Technology. The hardnesses of the original blade material were compared with the proposed solutions. The correctness of the proposed methods will be verified in the future and in operation.
ER