Method for positioning metal embedded part in flexible mold assisted RTM molding
A technology of metal embedded parts and positioning method, which is applied in the field of composite material forming, can solve problems such as difficulty in ensuring the positioning accuracy of metal embedded parts, offset of metal embedded parts, etc., achieve good promotion and application value, increase positioning accuracy, reduce The effect of production costs
Active Publication Date: 2014-12-24
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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Problems solved by technology
However, due to the particularity of the soft film-assisted RTM molding process, the metal embedded parts cannot be directly positioned on the metal mold. If the metal embedded parts are placed directly on the soft mold, as the temperature rises, the thermal expansion of the soft mold will cause the metal embedded parts The embedded parts deviate from the position when laying. According to the design of different rubber inner molds, the position deviation is generally greater than 1.5mm, and it is difficult to ensure the positioning accuracy of the metal embedded parts.
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[0037] The present invention is described in detail by embedding the metal embedded parts shown in Fig. 3 as an example, and the specific steps are as follows: figure 1 , 2 Shown:
[0038] 1. Preparation of soft mold
[0039] like figure 2 Shown on the surface of the metal mandrel 1, the silicone rubber soft mold 2 is prepared as a raw material, such as Figure 5 As shown, a groove 21 with a size of 40mm*40mm*4mm is reserved at the position where the metal embedded part 6 is placed on the soft mold 2;
[0040] 2. Positioning hole design and processing
[0041] As shown in Figure 3, a positioning hole 62 is respectively opened at the four corners of the positioning part 61 of the metal embedded part, and the area S of the end surface of the positioning part 61 of the metal embedded part is 40mm*40mm=1600mm 2 , the area positioning coefficient ξ is 0.018, the total area S of the positioning holes of the metal embedded parts 0 =ξS=28.8mm 2 , The positioning hole is design...
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Abstract
The invention provides a method for positioning a metal embedded part in flexible mold assisted RTM molding. The method comprises the following steps: forming a groove for mounting the metal embedded part in a flexible mold, forming a positioning hole, mounting a positioning part of the metal embedded part in the groove through a glue film, allowing a positioning rod to penetrate into a metal embedded part positioning hole and a flexible mold positioning hole, winding dry fiber yarns, impregnating and the like, thereby positioning the metal embedded part. According to the method provided by the invention, by utilizing the measures of positioning through the positioning rod and winding the metal embedded part through fibers, the positioning accuracy of the metal embedded part is stabilized within 1mm.
Description
technical field [0001] The invention relates to a positioning method for metal embedded parts in soft mold assisted RTM molding, and belongs to the technical field of composite material molding. Background technique [0002] The soft mold-assisted RTM process is a molding process in which the fiber preform is injected with resin through the RTM system, and the composite material preform is pressurized and solidified through the thermal expansion of the male mold (core mold and soft mold) in the closed rigid female mold. The soft mold assisted RTM molding process integrates the technical advantages of the traditional RTM process and the thermal expansion molding process, and has broad application prospects in the field of resin-based composite material preparation. [0003] When the product is prepared by the soft mold-assisted RTM molding process, a soft mold is added between the composite material reinforcement and the rigid core mold. The soft mold can be cast from an ela...
Claims
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IPC IPC(8): B29C33/12B29C70/78
Inventor 卢山杜姝婧张明田正刚许亚洪张宁史燕飞武玲
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH