Detaillierte Einführung in Hartmetall-Laufbuchsen

Multi-section Tungsten Carbide Liners

Tungsten carbide liners are pressed into the inner holes of pins with a certain amount of interference. To minimize axial deformation of the tungsten carbide liner after compression and enhance its fatigue life, shorter multi-section tungsten carbide liners are typically used in place of longer single-piece ones.

Stress Concentration in Tungsten Carbide Liners

The fatigue failure of tungsten carbide liners manifests as cracks in areas of tensile stress concentration, peeling in bonded areas, and wear in the folded and bent sections on the compression side. To prevent stress concentration and facilitate easy, damage-free insertion of the liner, the ends of the liner should be designed with rounded corners.

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Design of Tungsten Carbide Liners

The rubber liner for tungsten carbide liner track plates adopts a cylindrical shape. This cylindrical rubber sleeve is vulcanized and bonded to the rigid metal track pin, fitting into the inner hole of the track plate’s pin ear with an interference fit. The design and calculation usually encompass stress analysis of the rubber liner, determination of assembly interference, determination of pre-twist angle, and selection of liner rubber material.

Stress Analysis of the Rubber Liner in Tungsten Carbide Liners

When analyzing and calculating the shear stress induced by the torsion of the liner, the shape of the rubber liner before and after deformation is always considered to be cylindrical, with concentric layers being circular. The outer layer of the liner bears the torque M.