Manufacturing method and application of soft tool for longitudinal-transverse T-shaped reinforcing rib part forming

Abstract

The invention discloses a manufacturing method and application of a soft tool for a longitudinal-transverse T-shaped reinforcing rib part forming. The method comprises the working procedures of manufacturing a metal fake part, assembling the fake part on a mold bottom plate, paving materials for manufacturing the soft tool, packaging hot-pressing and the like, and the prepared soft tool is used for a hot pressing forming process of a composite material part with longitudinal-transverse T-shaped reinforcing ribs. The soft tool itself has certain rigidity, can ensure that the shape size after part forming meets a requirement, can uniformly and accurately transfer pressure applied by a hot pressing tank, avoids the situation that very poor thickness of the composite material part occurs, caneffectively ensure the forming quality of the part, improves the qualification rate and efficiency of production and ensure the relative position precision of the T-shaped ribs and a web after part forming, the surface quality after forming is good, and in addition, the soft tool can be repeatedly used, so that the production cost and the manufacturing cycle are effectively reduced.

Description

technical field [0001] The invention relates to a manufacturing method and application of soft tooling for forming vertical and horizontal T-shaped reinforcing ribs. Background technique [0002] Resin-based carbon fiber composite materials have superior properties such as specific strength and specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, and good dimensional stability. They are currently widely used in aviation, aerospace, transportation and other fields. High-performance structural materials. Among various carbon fiber composite molding processes, the autoclave process has uniform molding temperature and pressure, and has good adaptability to parts of different materials, shapes, sizes and structures. One of the main process methods of material components. [0003] With the increasing requirements for the strength and stiffness of composite parts, the structure of the parts is becoming more and more complex. Among them...

AI Technical Summary

Problems solved by technology

The shortcomings of using the mandrel method to form vertical and horizontal T-shaped stiffened webs mainly include the following four aspects: 1. Because the mandrel itself has a certain rigidity, it is difficult to achieve uniform and accurate transmission of external pressure through the mandrel, which is likely to cause T of the product. The thickness of the rib part is out of tolerance; 2. Since the core mold has a certain thickness, according to the heat conduction effect, the temperature rise rate of the T-shaped rib part of the part will lag behind other parts, thus affecting the internal molding quality of the part; 3. Since the core mold is Metal material, heavy weight, very inconvenient to operate, and in the case of large composite material parts, in order to ensure product dimensional accuracy and positioning benchmarks, the precision requirements of the mold must be high, so the manufacture and maintenance of metal mandrels Higher cost and longer manufacturing cycle for repair or rework

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