A kind of fiber reinforced thermoplastic composite material and metal laser pressure welding method
A composite material and fiber-reinforced technology, which is applied in the field of connection between thermoplastic composite materials and metals, can solve problems such as shape and size limitations, achieve reliable connection, improve mechanical properties, and avoid unfilled hole defects
Active Publication Date: 2022-07-19
BEIJING UNIV OF TECH
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Problems solved by technology
[0006] Most of the current laser joining methods use fixed clamping equipment (dot matrix clamping or linear clamping) to exert pressure on heterogeneous joints. Laser joining of mass components
Method used
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Embodiment 1
[0045] like Figure 1-7 As shown, this embodiment provides a method for laser pressure welding of fiber-reinforced thermoplastic composite material and metal, which mainly includes the following steps:
[0046] Step 1, prefabricating a nail-shaped raised structure 3 on the joint surface of the metal 1 to be welded.
[0047] Step 2, pre-set the pressure of the front roller 8 and the rear roller 9 of the laser to press the work head with welding, the amplitude, frequency and other parameters of the ultrasonic vibration device 7, and input the control center; According to the size and thickness of the workpiece, determine the laser power, Welding speed, spot size and other parameters.
[0048] Step 3, under the pressure of the front roller 8, the metal 1 and the thermoplastic composite material 2 in the to-be-welded area form a close fit. The material surface of the metal 1 is heated by the laser, and the heat is conducted to the connection interface between the metal 1 and the...
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Abstract
The invention discloses a method for laser pressure welding of fiber-reinforced thermoplastic composite material and metal, which relates to the technical field of thermoplastic composite material and metal connection. Tighten the working parameters of the working head; under the action of the pressure of the front roller, the metal in the to-be-welded area forms a close fit with the thermoplastic composite material; the surface of the metal material is heated by the laser to melt the thermoplastic resin matrix of the thermoplastic composite material; the pressure of the rear roller Under the action of the device and the ultrasonic vibration device, the protruding structure is embedded in the thermoplastic composite material, and the molten resin matrix flows and diffuses and fills the metal surface to realize the laser connection between the thermoplastic composite material and the metal. The invention can realize the connection of fiber-reinforced thermoplastic composite material and metal large three-dimensional structural parts in the fields of aerospace, automobile and the like, effectively suppress the generation of welding defects, ensure welding quality and improve the mechanical properties of welded joints.
Description
technical field [0001] The invention relates to the technical field of thermoplastic composite material and metal connection, in particular to a laser pressure welding method of fiber-reinforced thermoplastic composite material and metal. Background technique [0002] Fiber-reinforced thermoplastic resin matrix composites have the characteristics of high specific strength, good corrosion resistance and excellent fatigue resistance, and can be widely used in aerospace, automobile, new energy equipment and other fields. Traditional metal materials are still an indispensable and important structural material for modern equipment due to their unique advantages such as maintainability, recyclability, low cost, and mature molding and processing techniques. In modern equipment manufacturing, heterogeneous hybrid structures of composite materials and metal materials are increasingly used to achieve low-cost and lightweight manufacturing, so the connection between the two is inevitab...
Claims
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IPC IPC(8): B29C65/16B29C65/44
CPCB29C65/16B29C65/44B29C66/12421B29C66/12463B29C66/12461B29C66/1244B29C66/3032B29C66/342B29C66/742B29C66/83
Inventor 徐洁洁黄婷肖荣诗
Owner BEIJING UNIV OF TECH