Research on steel wire wound split ultra-high pressure die based on the principle of massive support

Abstract

To solve the problems of large-size cemented carbide sintering and supporting ring assembly faced by the belt-type die, a steel wire wound split-type ultra-high pressure die is proposed. In addition, in order to further improve the pressure-bearing capacity of the cylinder, a flat double-beveled cylinder structure is innovatively proposed according to the unique structure of the split cylinder and the principle of massive support. The finite element method was used to analyze the stress of the die with integral cylinder (IC), split cylinder (SC), split flat cylinder (SFC), split double-beveled cylinder (SBC), and split flat double-beveled cylinder (SFBC) respectively. The effects of split structure, flat structure, and double-beveled structure on the pressure-bearing capacity of the dies and the dimensional stability of the cavity were also investigated. In addition, an experiment was carried out to verified the reliability of the finite element model. The research results demonstrate that the split structure can significantly reduce the shear stress of the cylinder. Adding a flat structure or a double-beveled structure to the split cylinder can further reduce the shear stress of the cylinder. Moreover, the effect of only adding the double-beveled structure is better than that of only adding the flat structure. Particularly, when the flat structure and the double-beveled structure are applied simultaneously on the split cylinder, the maximum pressure-bearing capacity of the cylinder can be maximized. Additionally, although the flat double-beveled structure slightly increases the normal displacement of the inner wall of the cylinder, the stress of the support ring and the axial stress of the steel wire are within an acceptable range.