A method for integral liquid-filled forming of large annular lip parts

Abstract

The invention provides an integral liquid-filling forming method for a large annular lip part, belongs to the technical field of aviation aerospace sheet metal forming, and can solve the problem thatlarge annular lip parts are difficult to integrally form. The method comprises the steps of design and manufacturing of a transition forming die and a final forming die, selection and debugging of technological parameters, post-processing and the like. According to the method, a novel technology of multi-step liquid-filling forming is carried out on the basis of guaranteeing integral forming of the lip parts; and the integral forming of the lip parts is realized through a two-sequence liquid filling forming process and a one-sequence shaping process. The method has the advantages of being highin forming limit, high in size precision, good in surface quality, low in cost and the like, and can effectively reduce the problems of uneven deformation, thinning or serious wrinkling in local areas, difficult elimination of resilience and the like in a traditional stamping mode, so that the local defects of the lip are reduced and the advantages are remarkable. Meanwhile, the technology can bepopularized to other parts with similar characteristics, and has good development potential.

Description

technical field [0001] The invention belongs to the technical field of aerospace sheet metal forming, and in particular relates to a liquid-filled integral forming method for a large annular lip part, which can also be extended and applied to other parts with similar characteristics. Background technique [0002] Large lip parts are an important part of the air intake of an aero-engine. Their working environment is easily affected by complex conditions such as high-pressure, high-speed airflow and resonance. Generally, it is designed as a deep cavity variable cross-section parabolic shape with double flanges, and the drawing ratio is high. , It is difficult to manufacture, and it also has high requirements for strength and film precision. For the forming process of large lip parts, the traditional forming method usually adopts stamping forming, segmental welding forming and other methods, which are prone to uneven deformation, severe wrinkling or severe thinning in local are...

AI Technical Summary

Problems solved by technology

For the forming process of large lip parts, the traditional forming method usually adopts stamping forming, segmental welding forming and other methods, which are prone to uneven deformation, severe wrinkling or severe thinning in local areas and cracking, and the springback phenomenon is difficult to eliminate. There are many problems such as unstable performance, large errors, and difficult control of precision, resulting in poor surface quality, poor shape and dimension accuracy, affecting aircraft production efficiency, and bringing greater hidden dangers to flight safety.

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