Method and device for increasing the filling height of inner ribs in spin forming cylindrical parts with inner ribs

Abstract

The invention discloses a method and a device for improving filling height of an inner rib in spinning forming of a cylindrical part with an inner rib. A fixing ring and an axial restraining ring areadditionally arranged on an existing spinning mandrel of the cylindrical part with the inner rib, and the fixing ring is fixedly in threaded connection with the spinning mandrels; one end of a supporting rod is fixedly in threaded connection with an axial threaded through hole on the axial restraining ring, and the other end of the supporting rod penetrates through an axial through hole on the fixing ring and can move along the axial direction of the mandrel together with the axial restraining ring in the spinning forming process; a free end of a workpiece stretches and drives the axial restraining ring and the supporting rod to move towards the fixing ring in the spinning forming process of the cylindrical part with the inner rib, so that a compression spring on the supporting rod is compressed, an axial force in the opposite direction is provided for the free end of the workpiece, and the resistance to axial flow of the material is increased; and meanwhile, the axial constraint ringis provided with a circular groove with a diameter slightly larger than the outer diameter of the spinning workpiece, therefore, the radial expansion of the material is limited. The method and devicecan effectively improve the filling height of the inner rib.

Description

technical field [0001] The invention relates to the field of spinning forming processing, in particular to a method and a device for increasing the filling height of inner ribs in spinning forming of a cylindrical part with inner ribs. Background technique [0002] With the rapid development of high-end equipment in the fields of aviation and aerospace, especially the development of new-generation missiles and rockets, higher requirements have been put forward for the integration, high performance and lightweight of its key components. The cylindrical member with internal ribs is such a typical member, and its interior is designed with longitudinal, transverse or crisscross ribs, which can greatly improve the strength and stiffness of this type of member and reduce the weight of the member. The spinning technology makes the blank plastically deformed by the continuous point loading of the spinning wheel. It has the advantages of low forming load, simple mold structure, and h...

AI Technical Summary

Problems solved by technology

However, the limiting ring is rigidly connected to the spinning mandrel by threads. When the free end of the workpiece is not in contact with the limiting ring, the limiting ring cannot achieve the purpose of restricting the axial flow of materials; and when the free end of the workpiece is in contact with the limiting ring When in contact, the limit ring completely restricts the axial movement of the free end of the workpiece, which can easily lead to local bulges and non-mold defects in the workpiece, and the overall forming quality and stability of the workpiece are not good

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