Abstract: In allusion to velocity fluctuation, impacting and other issues of pallet cars for running sintering system, research on hot deformation of the sprocket wheel caused by temperature change is used to resolve the crux of the above-mentioned problem. Based on one-dimensional steady state heat transfer equation, establishes the mathematical model of temperature distributions in the base circle of sprocket wheel, according to its distribution characteristics, obtains the solving equations about radial deformation value of the base circle radius, associating with the tooth profile curve, deduces the actual tooth profile curve equations after hot deformation. Based on the geometric relationship of tooth profile curve before and after hot deformation of sprocket wheel, the parameters evaluated tooth profile error of hot deformation are acquired, and example is calculated, describes quantitatively the thermal deformation on the tooth profile curves, hot deformation for the tooth profile is simulated by finite element software, the displacement distribution curve of tooth profile is obtained, the simulation results are slightly larger than the theoretical calculations due to such factors as the simulation error, the correctness of the theoretical value is verified, it provides references for analyzing the instability of sintering system and the next tooth profile modification during manufacturing, has a certain application value.

Key words: Error analysis, Hot deformation, Sintering machine, Sprocket wheel, Temperature distribution