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A fast and low-cost invar steel tooling repair method

A low-cost and fast technology, which is applied in the fast and low-cost repair process of Invar steel tooling for composite material forming, and the field of fast and low-cost Invar steel tooling repair. The repair process is simple and convenient, the integrity of the tooling is good, and the repair materials are simple and easy to obtain.

Inactive Publication Date: 2019-07-16
沈阳浦利尔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, there is still no good repair method for this problem at home and abroad, and methods such as welding fillers and applying heat-resistant metal glue are still used, which cannot realize the rapid and low-cost repair process of Invar steel tooling

Method used

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with specific embodiments.

[0023] A fast and low-cost Invar steel tooling repair method is characterized in that: comprising the following steps;

[0024] 1. Collapse repair

[0025] 1) Use a brush to remove solid impurities in the collapsed area of ​​Invar steel tooling to avoid damage to other areas that do not need to be repaired. Use 200# sandpaper to roughen the surrounding and bottom surfaces of the collapsed area, so that you can feel the roughness with your fingers. ;

[0026] 2) Paste a layer of high-temperature structural adhesive film with a carrier on the surrounding and bottom surfaces of the collapsed area of ​​the tooling, cut a series of prepreg sheets according to the area to be repaired, and lay them up sequentially on the area to be repaired, with 3 to 5 layers per layup Vacuum compaction should not be less than 30 minutes, and it is advisable to ensure that the prepreg...

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Abstract

The invention discloses a quick low-cost repairing method for an Invar steel tool, and belongs to the technical field of composite molding tools. The repairing method comprises the following steps: 1)removing solid impurities, and selecting 200# abrasive paper and performing surface roughening on a to-be-repaired area of the Invar steel tool; 2) selecting a condensate of which the glass transition temperature is higher than that of an Invar steel tool molded composite product; 3) selecting a plain weave fabric with the carbon fiber surface density of 186-200 g / m<2> as a prepreg reinforcementor short carbon fiber as an epoxy repair adhesive reinforcement; and 4), adopting an adhesive film with a carrier and a high temperature structure as an adhesive for preparing a prepreg and an Invar steel tool shop, and achieving the effect of expansion coefficient transition when increasing the adhesion performance between the prepreg and the Invar steel tool shop. The repairing method is high inefficiency and low in cost.

Description

technical field [0001] The invention belongs to the technical field of composite material forming tooling, and in particular relates to a rapid and low-cost Invar steel tooling repair technology, which is suitable for the rapid and low-cost repairing process of Invar steel tooling for composite material forming. Background technique [0002] Invar steel, because its thermal expansion coefficient is similar to that of carbon fiber composite materials, and its specific heat capacity is smaller than that of commonly used metals, is easy to transfer heat. It is widely used in tooling for forming large composite structural parts that require high dimensional accuracy. Considering that Invar steel tooling is difficult to process and has a strong processing cycle, if damage occurs, the preferred solution is to repair it. The repair of the area to be repaired is traditionally repaired by welding filler in the area to be repaired and repaired by applying high-temperature resistant me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 王乾贾彩霞张辰关振许朋庞城德
Owner 沈阳浦利尔科技有限公司
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