Connecting method for leading edge cladding iron and blade tip cladding iron of helicopter composite blade

The invention belongs to an aeronautical manufacturing technology and a metal bonding technology, and particularly relates to a method for connecting a leading edge clad iron and a tip clad iron of a helicopter composite blade. The invention provides a novel connecting method for solving the problem of glue failure in lap joint and bonding of composite blade front edge clad iron and blade tip clad iron, the blade front edge clad iron and the blade tip clad iron are connected in a butt joint mode, and in order to guarantee current path connection between the blade front edge clad iron and the blade tip clad iron, an electric lap joint piece is arranged under the butt joint position of the blade front edge clad iron and the blade tip clad iron; in order to prevent different potential corrosion, the electric lap joint sheet and the clad iron are made of the same material, the thickness of the electric lap joint sheet is equal to that of the clad iron (0.4-0.5 mm), and the shape of the electric lap joint sheet is