Loose block combined thermoforming flanging mold and its application method

Abstract

The invention discloses a movable block combined type hot forming turnup mold and a use method, and belongs to the field of machining of precision sheet metal. The movable block combined type hot forming turnup mold comprises a lower mold body, an upper mold body, a wedge, a positioning pressing block, a scribed pin and a movable lip limit block, and the external profile of an air inlet channel serves as a standard. Turnup formation and hot shaping are carried out on the aluminum alloy thin-wall air inlet channel with a complex turnup structure through the hot forming technology, the air inlet channel is accurately positioned through the movable limit block in the mold, and the problem that turnup of a lip of the air inlet channel is difficult is solved. A part can be taken out by taking down the movable limit block after being formed, and the problem that demolding is difficult after turnup of the air inlet channel is conducted is solved. The movable block combined type hot forming turnup mold is suitable for precision formation of air inlet channels which are made of aluminum alloy and the like and provided with the complex turnup structure.

Description

technical field [0001] The invention relates to a combined thermoforming flanging die, in particular to a loose block combined thermoforming flanging die for an aluminum alloy thin-walled air inlet of complex shape. It is suitable for the precision forming of the air inlet with complex flanging structure of aluminum alloy and other materials used in aerospace, and belongs to the field of precision sheet metal processing. Background technique [0002] At present, the manufacture of air intake ducts of aircraft has been developed towards lightweight, special-shaped and integrated. The structure of some types of air intake ducts has been designed as a hollow closed structure with metal thin-walled special-shaped curved surfaces. For such special-shaped complex structural parts, the overall superplastic forming technology has achieved relatively ideal results, which can ensure one-time forming of special-shaped complex structural parts and smooth transition of curved surfaces. ...

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a loose-block combined thermoforming flanging die, aiming at the disadvantages of difficult forming and demoulding of the flanging part of the air inlet with a complex flanging structure, and adopting integral superplastic forming in the air inlet of the aircraft On the basis of the prefabricated blank with the basic shape, the loose block combined thermoforming mold is used to complete the flanging and thermal correction, so as to realize the forming of the flanging of the intake channel and the overall shape correction of the intake channel, and by adjusting the The movable block device solves the problem of difficult demoulding of the intake duct with complex flanging structure

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