FRI-1.202-1-MR-02
DETERMINATION OF THE INITIAL STRUCTURAL CHARACTERISTICS OF THE CYLINDRICAL AND ROTARY PARTS OF ENGINES IN AGRICULTURAL EQUIPMENT SUBJECT TO RESTORATION
Abstract
The article examines and establishes the distribution of the initial structural characteristics of cylindrical and rotary parts made of different grades of steel and cast iron and subject to restoration by welding from the leading brands of engines AGCO Power (SISU), JOHN DEERE Power Systems and FPT (FIAT Power-train Technologies), used in the offered brands of self-propelled agricultural machinery by the companies AGCO, JOHN DEERE, CNH and CLAAS. The graphical data show that 90% of all cylindrical surfaces of cylindrical and rotary parts subject to restoration by welding are in the range of 35- 90 mm, and that the largest number of cylindrical surfaces with a diameter of 45 - 50 mm. From the modal and average values of the statistical distribution of the studied engine brands, we have selected the structural characteristics of the physical model for laboratory studies of the quality of the parts restored by surfacing, operating under liquid friction: material - steel 45, diameter of the sample after final mechanical processing of the surfacing coating - 50 mm, total length of the surfacing sample - 250 mm, length of the restored section - 40 mm, mass of the sample - 3,5-4,0 kg, thickness of the surfacing metal (one-sided) - 0,5-1,0 mm.
Keywords
Agricultural machinery, engines, crankshaft, camshaft, piston pin, cylindrical surfaces, structural characteristic
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