A kind of composite tire mold formed by one mold and its forming method

Abstract

The invention discloses a one-die-formed combined forming die and a forming method thereof, which belong to the technical field of free forging. The combined forming die disclosed by the invention comprises a jacket with an inner hole, an inner lower backing ring, an inner upper backing ring I and an inner upper backing ring II, wherein the jacket, the inner lower backing ring and the inner upper backing ring I construct a primarily formed forming die; the inner lower backing ring is arranged on the lower part of the inner hole of the jacket; the inner upper backing ring I is arranged on the upper part of the inner hole of the jacket; a die cavity constructed by the inner upper backing ring I and the inner lower backing ring corresponds to a primarily formed blank in shape; the jacket, the inner lower backing ring and the inner upper backing ring II construct a secondarily formed forming die; the inner lower backing ring is arranged on the lower part of the inner hole of the jacket; the inner upper backing ring II is arranged on the upper part of the inner hole of the jacket; and a die cavity constructed by the inner upper backing ring II and the inner lower backing ring corresponds to a pre-forged blank in shape. The forming method disclosed by the invention comprises the following steps of: lengthening; performing primary forming; melting down and heating; and performing secondary forming.

Description

technical field [0001] The invention belongs to the technical field of free forging, and in particular relates to a combined tire mold formed by one die and a forming method thereof, which are used for making pre-forged pre-forged billets of various nozzle housing parts in aero-engine products. Background technique [0002] The nozzle housing parts for modern engines are important parts of the engine. The early design requires that such parts be cast; however, since the strength of the castings cannot meet the overall performance requirements of the high thrust-to-weight ratio engine, the design is changed to be produced by precision plastic forming technology Such parts, in order to achieve the purpose of improving their performance indicators; the nozzle shell parts manufactured by precision plastic forming technology basically retain the original casting design structure requirements. Due to the complex structure of the nozzle shell parts, the conventional forging process...

AI Technical Summary

Problems solved by technology

In China, although precision forgings with the same type of structure have been successfully developed, due to its complex structure and high dimensional accuracy, manufacturing is very difficult, resulting in a very low pass rate of precision forgings, only about 25%; using ordinary forging forming methods Billet, because many key technical problems have not been resolved, resulting in a final pass rate of only about 36%

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