Integrated knuckle bearing extrusion forming device and method

Abstract

The invention discloses an integrated knuckle bearing extrusion forming device. The device comprises an upper mold, an upper positioning plate, a positioning mandrel, a lower mold, a lower positioningplate, inner ring positioning members and a cage positioning spring; an upper mold cavity and an upper positioning cavity are formed in the upper mold, the upper mold cavity comprises an upper conical mold cavity body and an upper cambered mold cavity body, and the side wall of the upper conical mold cavity body is tangent to the side wall of the upper cambered mold cavity body; the upper positioning plate penetrates into the upper positioning cavity; the upper end of the positioning mandrel is coaxially connected to the upper positioning plate; a lower positioning cavity and a lower mold cavity are formed in the lower mold, the lower mold cavity comprises a cambered mold cavity body and a lower conical mold cavity body, and the side wall of the lower conical mold cavity body is tangent to the side wall of the lower cambered mold cavity body; the lower positioning plate coaxially positions and supports the lower end of the positioning mandrel; the inner ring positioning members axially position the inner ring; the cage positioning spring is coaxially supported on the inner side wall of the inner ring of an integrated knuckle bearing. By means of the integrated knuckle bearing extrusion forming device and method, the gap between the inner ring and the outer ring is uniform, the contact stress of the inner ring and the outer ring is small, and the surface quality of the outer ring is ensured.

Description

technical field [0001] The invention relates to the technical field of bearing manufacturing, in particular to an extrusion molding device and method for an integral joint bearing. Background technique [0002] Joint bearings are mainly used in multi-degree-of-freedom conditions, such as aircraft tail, propeller and other important parts. However, due to the constraints of the manufacturing process, at present, the internal lubricating layer of spherical plain bearings is often damaged during the forming process, resulting in reduced bearing life, unstable performance, and frequent jamming and dislocation accidents. Integral joint bearings have simple structure, high reliability in use, and are free from maintenance, so their use value is extremely high, and they are more and more widely used in modern industrial practice. [0003] The existing integral joint bearing molding method, the device includes an upper mold, a spring, a mandrel, and a lower mold. When the bearing i...

AI Technical Summary

Problems solved by technology

Existing integral self-lubricating joint bearing extrusion dies are mainly divided into single-angle conical surface and multi-radius spherical surface combination form in the cavity; in the extrusion molding process of the joint bearing in the form of multi-radius spherical surface combination, the gap between the inner and outer rings There will be two circles of line contact between them, and the outer ring will be formed under the extrusion of the mold with the contact position between the outer ring and the inner ring as the fulcrum, and the lubricating layer of the outer ring of the bearing will be destroyed. The joint bearing formed in this way usually produces Large contact stress and residual stress, and the positioning device of the inner ring is mainly the interference fit between the shaft hole of the joint bearing and the mandrel, and the shaft hole of the inner ring is further affected by the force of the outer ring during the extrusion process, resulting in extrusion After pressing, the bearing is not easy to disassemble, and the surface quality of the shaft hole is degraded, etc.

However, for bearing extrusion molds with a single-angle conical surface in the cavity, the closing effect on the outer ring of the spherical plain bearing is not obvious. Although the clearance between the inner and outer rings of the spherical plain bearing meets the standard requirements, the consistency of the clearance between the inner and outer rings of the spherical plain bearing The quality is very low, and the stress concentration of the bearing is obvious, which affects the service life

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