Roll shaping method of ultrahigh-strength steel complex deformed section annular piece

Abstract

The invention discloses a roll shaping method of an ultrahigh-strength steel complex deformed section annular piece and aims to roll the complex deformed section annular piece which is complete in appearance, high in dimensional precision and good in organization and performance and is distributed along the appearance of a part. The technical scheme is that after being heated, an ultrahigh-strength steel bar stock which is unloaded according to specifications forms a rectangular pre-rolled compact through upsetting, punching and ring rolling; after being heated, the rectangular pre-rolled compact is rolled to be a deformed pre-rolled compact by a pre-rolled inner type module and a pre-rolled outer type module in a pre-rolled deformed hole type, wherein the structural shape of the deformed pre-rolled compact is opposite to the structural shape of a finally-rolled deformed section annular piece; after being heated, the deformed pre-rolled compact is rolled to be the deformed section annular piece by a finally-rolled inner type module and a finally-rolled outer type module in a finally-rolled deformed hole type; in the process of rolling, the deformed pre-rolled compact broadens inside metal along the radial direction in the finally-rolled deformed hole type and flows from a more place to a fewer place according to preset volume flow quantity. The annular piece is mainly used for aerospace flight vehicle barrel-shaped revolved body components and parts.

Description

Technical field [0001] The invention relates to a rolling forming method of an annular piece, in particular to a rolling forming method of an ultra-high-strength steel with a complex profiled section. Background technique [0002] With the rapid development of aviation, aerospace, shipbuilding, nuclear energy, gas turbines, wind power generation and other industries, higher requirements have been placed on the forming dimensional accuracy, organization and performance of ring parts, and ring rolling technology has also moved towards With the development of the near-net forming direction, the cross-sectional shape of the rolled ring parts is becoming more and more complicated, and the rolling forming becomes more and more difficult. How to obtain the ring parts distributed along the shape of the part is the prerequisite to realize the precision rolling forming. [0003] The Chinese Invention Patent Specification CN101279343A published on October 8, 2008 discloses a rolling forming m...

AI Technical Summary

Problems solved by technology

Since this method adopts the rectangular pre-rolled billet to directly roll into special-shaped ring parts, it can only roll and form simple-shaped special-shaped cross-section ring parts under normal circumstances; if this method is used to roll complex-shaped special-shaped cross-section ring parts For ultra-high-strength steel rings with complex special-shaped cross-sections that also have convex surfaces on the groove surface, due to the complex metal flow of the rectangular pre-rolled billet in the rolling pass during the rolling process, the distance between the rectangular pre-rolled billet and the rolling pass The interaction interface is complex, and the rolling process has obvious nonlinear, time-varying, and unsteady characteristics, resulting in the rolling and forming of special-shaped cross-section rings that are prone to defects such as insufficient cross-sectional contours, folds on the outer surface, and fish scales on the end surface. As a result, the dimensional accuracy and structural properties of the final rolled ring parts are affected, and in severe cases, the ring parts may be scrapped, which is not conducive to the realization of precision rolling forming of special-shaped cross-section ring parts

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