Forging molding method of large-scale aluminum alloy conical ring

Abstract

The invention discloses a forging molding method of a large-scale aluminum alloy conical ring, and the method comprises the following steps: heating a cast ingot: heating the large-size cast ingot to the appropriate forging temperature; forging: performing compression and stretching on the cast ingot on a hydraulic machine multiple times; upsetting into a cone: utilizing an upper flat anvil and a lower flat anvil to upset the cast ingot repeatedly so as to enable the cast ingot to form the cone; punching: adopting a conical punch to punch a center hole on the cone so as to form the conical ring; machining: performing machining and shaping treatment on the conical ring so as to keep the obliqueness of the inner surface and the obliqueness of the outer surface of the conical ring consistent; and reaming: supporting a core rod through a saddle support, utilizing the core rod to prop against the inner surface of the conical ring and utilizing the upper flat anvil to press the outer surface of the conical ring so as to expand the inner hole of the conical ring. The method provided by the invention has the advantages of low cost, high utilization rate of materials, capability of ensuring that internal tissues of the conical ring can not be damaged and the like.

Description

technical field [0001] The invention relates to the field of forging processing, in particular to a method for forging and forming a large aluminum alloy tapered ring. Background technique [0002] The traditional production of aluminum alloy tapered rings mainly relies on the following two methods. The first is die forging method: by making a die that is close to the size of the forging, hot die forging is formed on a large hydraulic press. The second is the forging straight ring method: forging produces a straight ring with the same inner and outer diameters on the upper and lower end faces, and obtains the corresponding cone ring size through mechanical processing. [0003] During the research and practice of the prior art, the inventors of the present invention have found that the prior art has the following problems: [0004] For the die forging method, it is more suitable for small conical rings with large batches. For large forgings with an outer diameter greater tha...

AI Technical Summary

Problems solved by technology

[0004] For the die forging method, it is more suitable for small conical rings with large batches. For large forgings with an outer diameter greater than 1200mm, the mold cost is very high and more than 45,000 tons of hydraulic presses are required. There is no corresponding equipment in China.

For the forged straight ring method, the straight ring hole reaming is combined with the machining method for production. On the one hand, there are large requirements for the size of the round casting bar, and it is difficult to control the quality of the internal structure of the ingot.

On the other hand, machining and forming destroys the continuity of the internal tissue streamline, and the material utilization rate is low

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