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Method using soft metal braid over braid to repair helicopter main blade electric bonding sheet fracture

A technology of braided tape and soft metal is applied in the field of repairing the fracture of the main blade of the helicopter, which can solve the problems of long lap pieces, difficult bonding, and difficult bonding between the electric lap pieces and the leading edge wrapping piece. , to ensure the maintenance work, the effect is good

Inactive Publication Date: 2016-04-20
HARBIN
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] (a) Generally, electrical laps are relatively long and difficult to bond
[0005] (b) The electrical lap is generally pressed under the leading edge wrap of the main blade, and the surface is coated with conductive metal tin. If it is replaced again, it is difficult to deal with the bonding between the electric lap and the leading edge wrap

Method used

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  • Method using soft metal braid over braid to repair helicopter main blade electric bonding sheet fracture

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0021] A method for repairing the breakage of the electric grounding piece of the main blade of a helicopter by using a soft metal braid, comprising:

[0022] (a) Use a tool to remove the excess glue on the electrical lap and the leading edge of the blade;

[0023] (b) clean the surface to be bonded with methyl ethyl ketone, and let it dry naturally for 1 hour;

[0024] (c) Fix the electrical lap and the blade. If the electrical lap and the blade are bonded with normal temperature structural adhesive, the normal temperature is 22-24 degrees Celsius, and the complete curing time is 7 days; if Use medium-temperature structural glue to bond the electrical laps of the glue-opening part to the blades, the medium temperature is 70-75 degrees Celsius, and the complete curing time is 2 hours;

[0025] (d) Remove the heating equipment, remove the clamping tool, and ...

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Abstract

A method using soft metal braid over braids to repair helicopter main blade electric bonding sheet fractures comprises the following steps: a, using a tool to remove an unglued portion electric bonding sheet and residual glue on a blade front rim; b, using butanone to clean a to be bonded surface, and naturally airing for 1 hour; c, fixing the electric bonding sheet with the blade, using normal temperature structure glue to bond the unglued portion electric bonding sheet with the blade, or using medium temperature structure glue to bond the unglued portion electric bonding sheet with the blade; d, removing a heating device and a clamp, and cleaning overflowing glue bumps; e, using a fine sand paper to respectively polish a segment zone on two sides of the electric bonding sheet fracture portion, and using an electric iron to tin the polished zones; f, selecting a soft metal braid over braid bonding wire; g, using the electric iron to weld the two ends of the braid over braid bonding wire on two sides of the electric bonding sheet fracture.

Description

technical field [0001] The invention belongs to a repair method for a helicopter, and relates to a method for repairing a broken electric grounding sheet of a main blade of a helicopter by using a soft metal braided belt. Background technique [0002] The electrical laps of helicopter main blades are generally made of metal copper sheets. The resistivity of copper sheets is low, generally 0.0172Ωmm2 / m, and has good elongation. The electrical laps are generally bonded to the surface of the composite material main blade, and when the bonded structural glue is released, it is easy to cause the breakage of the electrical laps. When the electric lap breaks, the repair method adopted in the prior art is to completely replace the electric lap. [0003] Re-replacing the electrical laps is relatively difficult to repair, and it is not suitable for maintenance under field conditions. The main reason is: [0004] (a) Generally, the electrical laps are relatively long and difficult t...

Claims

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Application Information

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IPC IPC(8): B64F5/00B64F5/40
Inventor 刘政张元瑞杨库李成姜志金王雪松胡伟于馨皓聂宏昱
Owner HARBIN
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