Laser wire filling welding method and equipment for thermoplastic composite material butt joint structure

Abstract

The invention relates to a laser wire filling welding method and equipment for a thermoplastic composite material butt joint structure. The laser wire filling welding method comprises the following steps that a material selected and used in the thermoplastic composite material butt joint structure laser wire filling welding process is carbon fiber reinforced thermoplastic plastic (CFRTP), and thesize of the carbon fiber reinforced thermoplastic plastic is 50mm x 25mm x 3.0mm; fastening pressing plates on the upper surface of the CFRTP composite material are adjusted to prevent a thermoplasticcomposite material from generating arch bend deformation in the welding process; and a wire feeder and a wire filling head are utilized to place filling resin at a welding line, laser acts on the filling resin in the welding process to make the filling resin be in a molten state, pressure is applied to one end of the CFRTP composite material butt joint structure, a molten state resin material flows, diffuses and solidifies under the action of external pressure, and a welding joint is formed. By means of the laser wire filling welding method and equipment for the thermoplastic composite material butt joint structure, a set of special tooling fixture equipment is designed aiming at the CFRTP thermoplastic composite material laser welding butt joint structure, and a solid foundation is laidfor application and development in the future of the CFRTP composite material laser welding technology.

Description

technical field [0001] The invention relates to a laser wire-filling welding method and equipment for thermoplastic composite material butt joint structures, belonging to the technical field of thermoplastic composite material welding. Background technique [0002] Carbon fiber reinforced thermoplastic composites (CFRTP) use thermoplastic resin as the matrix, which has the characteristics of heating softening and cooling hardening. In recent years, thermoplastic composite materials have been gradually applied and widely concerned in the aerospace field due to a series of advantages such as good toughness, short molding cycle, low cost and obvious weight reduction effect. [0003] Laser welding technology is currently a relatively advanced connection technology. Laser has the characteristics of high energy density, fast welding speed, small heat input, and good flexibility. Laser welding technology can not only obtain excellent joint mechanical properties, but also realize t...

AI Technical Summary

Problems solved by technology

[0004] For the butt joint structure of thermoplastic composite materials, the commonly used welding methods mainly include mechanical riveting and adhesive bonding technology, but mechanical riveting needs to make holes on the parts. Due to the anisotropy of the internal structure and properties of composite materials, hole making will affect the structure of composite materials. performance

Compared with mechanical connection technology, adhesive bonding technology has no damage to materials, no connection stress concentration and excellent fatigue resistance, but its complex process and poor joint connection performance cannot meet the practical application of thermoplastic composite materials

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