Assessing the gate assembly tightness based on the results of simulating rough surfaces after the one- and five-disc grinding

The paper assesses tightness of the pipeline gate assembly rough metal surfaces after the one- and five-disk grinding. The machined sealing surfaces are fragments of the random fields depending on three spatial coordinates: coordinates of a point on the sealing surface and its height. To assess statistical properties of such fields, the paper uses the probability distribution law and its numerical characteristics in the forms of autocorrelation functions and spectral densities. It determines statistical properties of the surface micro-relief and reproduces random fields with statistical properties of the experimental parts. The paper shows that random fields are models of the sealing surfaces, which could be used in the tightness assessment experiments. The contact surfaces and contact areas pressing is simulated by cutting off the maximum height of the surface under study. Numerical experiments are conducted to simulate the pressing of parts; the gap between random fields, i.e. models of the two sealing surfaces, is computed. The paper uses random field simulation to obtain mathematical models of roughness after the one- and five-disk grinding; the models reflect statistical properties of the machined surfaces. According to results of the rough surfaces simulation, the paper indicates that the five-disk grinding provides higher tightness than the one-disk grinding.
EDN: DGKBRA, https://elibrary/dgkbra

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