Uneven slope matching structure of counterbore type die sleeve and die core

Abstract

The present application relates to the technical field of forging die, and discloses a counter-bend matching structure of a counter-bore type die sleeve and a die core and a structural design, which comprises a die core and a die sleeve; the die sleeve is provided with a counter-bore for inserting the die core, and the side wall of the die core is in interference fit with the counter-bore; after the die core and the die sleeve are assembled, the side wall of the die core and the side wall surface of the counter-bore of the die sleeve form a side wall matching surface, and the side wall matching surface is a counter-bend structure; by virtue of the large bottom rigidity of the counter-bore type die sleeve, the side wall of the die core is designed as a conical surface with a small radius at the bottom and a large radius at the mouth, the side wall of the counter-bore of the die sleeve is a cylindrical surface, and the two form a counter-bend matching, or the side wall of the die core is a cylindrical surface, and the side wall of the counter-bore of the die sleeve is a conical surface with a small radius at the mouth to form a counter-bend matching, so that the distribution effect of the die core is obtained, the pre-pressures at the mouth and the bottom of the die core are substantially equal, the pre-pressures at the mouth and the bottom of the die core are substantially equalized, and the pre-pressures at the mouth are greatly improved.

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