Research on the Method of Calculating the Wear Extent of the Rocket Sled Slipper Based on Pin-on-Disk Tests

Abstract

This paper carries out the pin-on-disc wear test on the wear characteristics of the slipper-rail material under different loads and different speeds, and the research results show that: with the increase of load, the wear extent increases, but the relationship between speed and wear extent is not single; through linear regression analysis method to fit the pin-on-disc test wear extent, we get the wear coefficient k = a + b(pv) + c(pv)² of the slipper material when mating with the U71Mn steel, where a = 2.604 x 10⁻⁵, b = 1.115 x 10⁻¹⁰, c = 4.944 x 10⁻¹⁶. Then, from the wear loss effect of the slipper, the formula for calculating the wear extent of the slipper was derived, and the wear thickness of the slipper was calculated when the sled was accelerated to 1700m/s in a project.