Forming tool and method for annular composite part with section in pi shape

Abstract

The invention belongs to the field of composite material die pressing forming, and particularly relates to a forming tool and method for an annular composite part with the section in a pi shape. According to traditional vacuum bag hot pressing forming, gum deposition will be caused, pressure in sufficient, die assembly is not in place, and therefore part precision is excessively poor. When vacuumbag hot pressing forming is adopted, the heating speed is low, and part deformation is caused. The forming tool comprises a base and a cover plate which are arranged outside and further comprises a lower module, a middle module, an upper module and an outer module which are arranged inside. The outer module is of a sectional annular structure, the other parts are of an integrated annular structure, and an annular pi shaped cavity is formed after the internal modules are combined. A preformed body is formed in advance, the modules are combined with the preformed body, the size precision and surface roughness degree of each end face of products can be effectively ensured, it can be ensured that gum liquid soaks materials at each place through vacuum pumping and pressurized gum infusion ways,and part quality is effectively ensured.

Description

technical field [0001] The invention belongs to the field of compression molding of composite materials, and in particular relates to a molding tool and method of a π-shaped cross-section annular composite material part. Background technique [0002] In the molding process of composite materials, precise positioning and compression are required between each module. For the new type of π-shaped reinforcement frame, RTM molding technology is used for molding. The traditional vacuum bag thermoforming will cause glue accumulation, and the pressure is not enough to close the mold in place, resulting in excessive precision of parts. The use of vacuum bag thermoforming will also result in low heating rate and deformation of parts. Contents of the invention [0003] The technical problem to be solved by the present invention is: by forming the preform in advance, and then through the combination of the module and the preform, the dimensional accuracy and surface roughness of each...

AI Technical Summary

Problems solved by technology

The traditional vacuum bag thermoforming will cause glue accumulation, the pressure is not enough, the mold is not in place, and the precision of the parts is out of tolerance

The use of vacuum bag thermoforming will also result in low heating rate and deformation of parts

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