A glue riveting mixed assembly method and assembly structure of composite material lip and air inlet

A mixed assembly and air intake technology, which is applied in the direction of material gluing, combustion of the air intake of the power unit, connecting components, etc., can solve problems such as easy scratches on the composite material layer, inability to use nails, and excessively large bolt heads. , to achieve the effect of preventing galvanic corrosion, improving mechanical connection strength, reducing seam and step difference

Active Publication Date: 2022-01-18
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the overlapping connection structure has large gaps and steps
On the other hand, when the inner cavity of the air inlet of the tubular structure is small, the nail gun cannot enter, so the nail cannot be used for installation, and the bolt heads are often too large, which is easy to scratch the composite material layer

Method used

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  • A glue riveting mixed assembly method and assembly structure of composite material lip and air inlet
  • A glue riveting mixed assembly method and assembly structure of composite material lip and air inlet
  • A glue riveting mixed assembly method and assembly structure of composite material lip and air inlet

Examples

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Effect test

Embodiment 1

[0032] This embodiment provides a method for gluing and riveting hybrid assembly of the composite lip and the air inlet. The composite lip 1 and the composite air inlet 2, which are aligned with the aerodynamic surface of the inner cavity, are connected by the composite material arranged on the outer ring. The parts 3 are connected as a whole; the composite material lip 1 is connected to the composite material connecting part 3 through the normal temperature glue 5 and the countersunk rivet 4 at the same time, and the composite material inlet 2 is passed through the normal temperature glue 5 and the countersunk rivet at the same time 4 is connected with the composite connector 3.

[0033] The mixed assembly method of glue riveting specifically includes the following steps:

[0034] Step S100: brush a layer of room temperature glue 5 on the assembly surface outside the port of the composite air inlet 2;

[0035] Step S200: Partially overlap the composite material inlet duct 2 ...

Embodiment 2

[0049] In this embodiment, on the basis of Embodiment 1, the R-angle area where the curvature of the composite material lip 1 and the composite material inlet channel 2 changes greatly is only connected to the composite material connector 3 through room temperature glue 5, and no countersunk head is installed. Rivet 4. The non-R angle area of ​​the composite material lip 1 and the composite material air inlet 2 is connected with the composite material connector 3 through the countersunk rivet 4; among them, the non-R angle area of ​​the composite material lip 1 and the composite material air inlet 2 Refers to a flat area with small curvature changes.

[0050] On the one hand, the arrangement position of the countersunk rivets 4 avoids the area with the largest curvature change on both sides, and at the same time, the head of the countersunk rivets 4 is as flush as possible with the aerodynamic surface of the inner cavity. Usually, through strength calculation and analysis, a ...

Embodiment 3

[0056] On the basis of Embodiment 1 or Embodiment 2, this embodiment discloses a composite assembly structure of a composite material lip and an air inlet, including a composite material lip 1 and a composite material air inlet 2; The composite material lip 1 and the composite material inlet 2 are assembled together with a composite material connector 3 of the jacket; the composite material lip 1 and the composite material connector 3 are simultaneously connected by countersunk rivets 4 and room temperature glue 5; The composite material inlet channel 2 is connected with the composite material connector 3 through countersunk rivets 4 and room temperature glue 5 at the same time. At this time, the composite material lip 1 and the composite material inlet port 2 are terminated, that is, the composite material lip 1 and the composite material inlet port 2 have basically the same aerodynamic surface of the inner cavity, and there is no obvious mutation.

[0057] Further, the count...

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Abstract

The invention relates to the technical field of lip and air inlet assembly, and discloses a composite material lip and air inlet gluing mixed assembly method, the composite material lip and the composite material air inlet are aligned with the aerodynamic surface of the inner cavity It is connected as a whole by the composite material connecting piece arranged on the outer ring; the composite material lip is connected with the composite material connecting piece through normal temperature glue and countersunk rivets at the same time, and the composite material inlet is simultaneously passed through normal temperature glue and countersunk head Rivets are connected to composite connectors. The glue-rivet mixed assembly method of the present invention adopts the combination of glue joint and rivet joint to ensure the high mechanical connection strength of the butt joint assembly of the composite material lip and the composite material inlet port, and at the same time make the surface of the aerodynamic surface of the inner cavity after the connection Significantly improved quality with reduced butt joints and steps at butt sections.

Description

technical field [0001] The invention relates to the technical field of lip and air intake duct assembly, in particular, it relates to a glue riveting mixed assembly method for composite material lip and air intake duct. Background technique [0002] In the prior art, the lip and the air inlet are mostly assembled by drawing nails or bolts in an overlapping manner. On the one hand, the overlapping connection structure has large gaps and steps. On the other hand, when the inner cavity of the air inlet of the tubular structure is small, the nail gun cannot enter, so the nail cannot be used for installation, and the bolt heads are often too large, which is easy to scratch the composite material layer. Contents of the invention [0003] The present invention aims at the defects of large seams and large step differences in the lap joint assembly method in the prior art, and provides a composite material lip and air intake channel glue riveting mixed assembly method, through whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J15/02F16B11/00B64D33/02
CPCB21J15/02F16B11/006B64D33/02
Inventor 王珏方雄丁健杨文罗丹杜发喜
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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