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A method for protecting the bottom hole of composite material/additive material

A composite material and material technology, applied in the direction of hand-held tools, metal processing, manufacturing tools, etc., can solve problems such as limited operating space, inability to meet equipment use and maintenance requirements, and inability to assemble

Active Publication Date: 2021-05-18
西安聚行机电科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of complex structures, the above methods all have limited operating space and cannot be assembled
With the improvement of requirements for reliability, fatigue life, production efficiency, etc., traditional methods can no longer meet the needs of equipment use and maintenance throughout the life cycle

Method used

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  • A method for protecting the bottom hole of composite material/additive material
  • A method for protecting the bottom hole of composite material/additive material
  • A method for protecting the bottom hole of composite material/additive material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] This embodiment provides a method for protecting the base hole of a composite material. The protection method is: install an interference stagnant bushing on the bottom hole of the composite material or additive material, the stagnant bush is a straight bushing 11, and the The specific process of installing the stagnant bushing is: the cold extrusion installation tools selected in the installation process include: combined mandrel, pulling gun and installation of nose cap.

[0078] S1. Make holes on the base material, the base material is: carbon fiber composite material, and the position conditions for making holes that need to be explained are as follows:

[0079] The distance from the right side of the hole to the nearest obstacle is: Forward Clearance

[0080] The distance from the left side of the hole to the nearest obstacle is: Backward Clearance

[0081] The distance from the centerline of the hole to the upper obstacle is: upper clearance

[0082] The distanc...

Embodiment 2

[0099] This embodiment provides a protection method for the base hole of composite material. The protection method is to install an interference retention bushing on the bottom hole of composite material or additive material. The installation process is as follows: Figure 10a As shown, the retention bushing is a flange bushing, and the specific process of installing the retention bushing is as follows:

[0100] The cold extrusion installation tools selected in the installation process include: combined mandrels, pull guns, nose top caps, and end surface pressing components.

[0101] S1. Make holes on the base material, the base material is: carbon fiber composite material, where the position conditions for making holes need to be explained, such as Figure 9 Shown:

[0102] The distance from the right side of the hole to the nearest obstacle is: Forward Clearance

[0103] The distance from the left side of the hole to the nearest obstacle is: Backward Clearance

[0104] Th...

Embodiment 3

[0123] This embodiment provides a method for protecting the base hole of a composite material. The protection method is: installing an interference retention bushing on the bottom hole of the composite material or additive material, such as Figure 12 As shown, the specific process of installing the stagnant bush is as follows: the cold extrusion installation tools selected in the installation process include: combined mandrel, pull gun, and installation of nose cap 3 and telescopic pad 4;

[0124] The cold extrusion installation tools selected in the installation process include: a combined mandrel, a pull gun, and a nose top cap 3 and a telescopic spacer 4 .

[0125] S1. Make two initial holes with coincident centerlines and the same diameter on the base material. The base material is: titanium alloy additive material, and the operating space of the initial holes on the base material is limited. The initial hole at the far end of the operation is defined as The primary hole ...

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Abstract

The invention provides a method for protecting the bottom hole of the composite material / additive material, which includes installing an interference retention bush on the bottom hole of the composite material / addition material, and the specific process of installing the retention bush is as follows: Open the bottom hole for installing the bushing on the material, put the bushing into the bottom hole or set it on the combined mandrel, then pass the combined mandrel through the nose cap and connect it with the pulling gun, and the nose cap is firmly placed on the surface of the bottom hole. Start the pulling gun to pull the extrusion head of the combined mandrel away from the bottom hole, so that the bushing and the bottom hole have an interference fit. And retain it in the bottom hole; the final hinge retains the bush to the required inner diameter size, and completes the installation of the retaining bush. The invention can reduce the initial damage of the inner surface of the bottom hole, prevent the delamination of the composite material at the bottom hole, improve the efficiency of installation, disassembly and replacement, improve the fatigue life of the hole and the reliability of use, and can meet the requirements of the composite material in the whole life cycle. The use and maintenance requirements of the bottom hole of the additive material.

Description

technical field [0001] The invention belongs to the technical field of composite materials and additive materials, and in particular relates to a method for protecting bottom holes of composite materials and additive materials. Background technique [0002] With the development of modern high technology, carbon fiber composite materials and additive materials are widely used. However, in modern aviation, aerospace vehicles, high-speed trains, etc., the position of the holes made in the high-frequency and low-frequency vibration conditions is the main source of fatigue. In order to protect the holes made and increase the fatigue life of the structure, the current main use is Install the bushing to protect the hole made by the temperature difference method or glue method. The process of assembling the bushing by the temperature difference method is complicated, and it is easy to fall off and cause surface damage on the inner wall of the hole, which reduces the reliability and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25B27/02B23P15/00B26F1/00B26F1/16
CPCB23P15/00B25B27/02B26F1/00B26F1/16
Inventor 刘凯邓鑫
Owner 西安聚行机电科技发展有限公司
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