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Surface treatment method for composite material blade of helicopter

A composite material and surface treatment technology, which is used in devices for coating liquids on surfaces, pre-treated surfaces, aircraft parts, etc. It can solve the problems of coating peeling, cracking, aging, etc., and achieve the effect of solving coating peeling.

Inactive Publication Date: 2010-12-15
HARBIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is designed to solve the above-mentioned problems in the prior art and provides a method for surface treatment of helicopter composite blades. This method improves the surface treatment process of existing composite materials and incorporates the mild Corrosion technology solves the problems of coating peeling, cracking and aging of composite blades during use

Method used

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Embodiment Construction

[0059] Below in conjunction with embodiment technical solution of the present invention will be described in further detail:

[0060] The method for the surface treatment of the helicopter composite blade is characterized in that: the steps of the method are:

[0061] 1. Pretreatment process

[0062] 1.1. Isolate, polish, and clean the propeller thoroughly with a cleaning agent such as hyso 990, isolate the metal parts on the propeller, such as the adjustment piece and the iron covering on the leading edge, etc., and polish the propeller gently with 150-grit sandpaper without damage Leaf skin, roots and other parts that need to be treated;

[0063] 1.2. Epoxy putty coating, using L6996, coating temperature is 15-25°C, relative humidity is 40-70%, coating procedure:

[0064] a. Fill the pinholes and more than 1mm deep defects on the paddle skin and polyurethane belt with epoxy putty, apply along the chord direction, the direction is down, up and down, and coat the upper and l...

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Abstract

The invention discloses a surface treatment method for a composite material blade of a helicopter, and belongs to the technical field of the surface treatment of composite materials. The method is characterized by solving the problems of falling, cracking and aging of a coating during the use of the composite material blade by improving the conventional surface treatment technology for the composite material. Normal temperature slight corrosion technology of metal is used on leading edge coating iron of the composite material blade for solving the problem of surface chemical treatment of the composite material blade before the leading edge coating iron is painted. The method comprises the following steps of: filling pinholes on the surface of the composite material blade with epoxy putty;coating an epoxy primer to enhance the bonding force of the paint layer; coating a wash primer to solve the problem of the bonding force between the leading edge coating iron and the paint layer; andcoating a polyurethane finish. Compared with the prior art, the method of the invention solves the problem of the surface chemical treatment of the composite material blade before the leading edge coating iron is painted, so that the problem of paint peeling of the leading edge coating iron of the composite material blade is solved.

Description

technical field [0001] The invention relates to a method for treating the surface of a composite material blade of a helicopter, belonging to the technical field of composite material surface treatment. Background technique [0002] In the lift system of a helicopter, the blade is an important component that provides lift. In addition to the aerodynamic requirements for the blade design, there are also dynamic and fatigue requirements. The surface treatment method of the blade must also meet the aerodynamic, dynamic and fatigue requirements of high-frequency impact, high-speed rotation, and large curvature bending. [0003] At present, the surface treatment method of helicopter composite blades has always been the continuation of the surface treatment method of metal blades, that is, the process method of primer + topcoat. Due to the different materials, composite material blades often have problems such as coating peeling, cracking, and aging during use. The leading edge o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64F5/00B05D1/38B05D3/02B05D3/12B05D3/00B05D7/00
Inventor 李华毛英坤胡令金李心明姜春玉万杰李延海尹钰东徐超金永生
Owner HARBIN
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