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Deforming control method of pre-formed composite forming process and application of control method

A molding process and composite material technology, used in ceramic molding machines, manufacturing tools, etc., can solve problems such as shape deviation, easy deformation, and inability to prepare products of predetermined shapes, achieve comprehensive deformation control, improve product molding rate, processing Good uniformity and repeatability

Active Publication Date: 2019-03-26
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the preform is soft and easy to deform as a fabric, its hardness and strength will gradually increase during the molding process. However, if the deformation occurs before the strength is sufficient to resist the deformation, if it is not stopped in time, the final shape may deviate and cannot be prepared. products in predetermined shape
Preforms with partially open structures are more prone to deformation. Therefore, there is an urgent need for a deformation control method during the molding process of preformed composite materials to solve the current problems

Method used

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  • Deforming control method of pre-formed composite forming process and application of control method
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  • Deforming control method of pre-formed composite forming process and application of control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] First of all, the fiber yarn is mechanically needled, and 15% of the processing allowance is reserved for the inside and outside to prepare a preform that conforms to the shape and direction of the product. The structure of the preform is as follows: figure 2 As shown, the prefabricated body is an open structure.

[0053] During the impregnation and gel stages, use aluminum metal fixtures (such as figure 2 Shown) hold the preform and impregnate once, and the solid content of the glue is 40%. After the impregnation is completed, perform gel treatment on the preform (the preform refers to the preform after the impregnation stage), and continue to use aluminum metal clamps to hold the preform during the gel process (the preform refers to the Preforms treated in the impregnation stage) for dimensioning.

[0054] After the gel is completed, the gel-treated preform is dried. In the drying stage, the preform (the preform refers to the preform processed in the coagulation s...

Embodiment 2

[0058] First of all, the fiber yarn is mechanically needled, and 15% of the processing allowance is reserved for the inside and outside to prepare a preform that conforms to the shape and direction of the product. The structure of the preform is as follows: figure 2 As shown, the prefabricated body is an open structure.

[0059] During the impregnation and gel stages, use aluminum metal fixtures (such as figure 2 Shown) hold the preform and impregnate once, and the solid content of the glue is 40%. After the impregnation is completed, perform gel treatment on the preform (the preform refers to the preform after the impregnation stage), and continue to use aluminum metal clamps to hold the preform during the gel process (the preform refers to the Preforms treated in the impregnation stage) for dimensioning.

[0060] After the gel is completed, the gel-treated preform is dried. In the drying stage, the preform (the preform refers to the preform processed in the coagulation s...

Embodiment 3

[0064] First of all, the fiber yarn is mechanically needled, and 15% of the processing allowance is reserved for the inside and outside to prepare a preform that conforms to the shape and direction of the product. The structure of the preform is as follows: figure 2 As shown, the prefabricated body is an open structure.

[0065] During the impregnation and gel stages, use aluminum metal fixtures (such as figure 2 Shown) hold the preform and impregnate once, and the solid content of the glue is 40%. After the impregnation is completed, perform gel treatment on the preform (the preform refers to the preform after the impregnation stage), and continue to use aluminum metal clamps to hold the preform during the gel process (the preform refers to the Preforms treated in the impregnation stage) for dimensioning.

[0066] After the gel is completed, the gel-treated preform is dried. In the drying stage, the preform (the preform refers to the preform processed in the coagulation s...

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Abstract

The invention relates to a deforming control method of a pre-formed composite forming process and application. The control method comprises the steps that fiber yarn is machined into a prefabricated body meeting the product shape and walking direction, and during machining, the subsequent mechanical machining allowance is reserved inside and outside; in the impregnation, gelation, drying and sintering process, according to the process condition of each stage, whether a clamp is used for not is determined, and which kind of clamp is used for shape maintaining is determined, so that the ceramicmaterial blank body with the small deforming is obtained; and finally, the ceramic material blank body is mechanically machined, and during machining, according to the shape and the fiber direction ofthe prefabricated body, the machining direction is selected. Multiple deforming control manners are adopted, in the whole forming process, coordination is continuous, the ceramic product with the deforming amount obviously reduced is prepared, the method can be applied to preparing of multiple complex-profile easily-deforming products, and the wide application prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of material forming, in particular to a deformation control method in the forming process of a preformed composite material and an application of the control method. Background technique [0002] Fiber-reinforced silica composite material is a multifunctional composite material developed in recent years that can simultaneously meet the functions of heat insulation and load bearing. It has good heat insulation performance, high compressive strength, small thermal expansion coefficient, and low density. And other advantages, widely used in the aerospace field. [0003] At present, fiber-reinforced silica composites mainly focus on the method and application of its material preparation, and less research on its application in actual products, especially the applicability of a variety of special-shaped products of different shapes. [0004] Composite material integrated molding technology is a molding method th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B1/52B28B1/38C04B35/80C04B35/622
CPCC04B35/622C04B35/80B28B1/38B28B1/52
Inventor 张冰清杨小波吴焘苗镇江王华栋孙志强崔凤丹张剑李淑琴于长清吕毅
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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