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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 restrictions

Active Publication Date: 2021-05-11
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Fiber reinforced thermoplastic composite material and metal laser pressure welding method
  • Fiber reinforced thermoplastic composite material and metal laser pressure welding method
  • Fiber reinforced thermoplastic composite material and metal laser pressure welding method

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Experimental program
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Embodiment 1

[0045] Such as Figure 1-7 As shown, this embodiment provides a fiber reinforced thermoplastic composite material and metal laser pressure welding method, which mainly includes the following steps:

[0046] Step 1, prefabricating a nail-shaped raised structure 3 on the surface of the joint 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 welding pressing work head, the amplitude and frequency of the ultrasonic vibration device 7 and other parameters, and input them into 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 in the area to be welded and the thermoplastic composite material 2 form a tight fit. The laser heats the material surface of the metal 1 , and through heat conduction to the connection interface between the metal 1 and ...

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Abstract

The invention discloses a fiber reinforced thermoplastic composite material and metal laser pressure welding method, and relates to the technical field of thermoplastic composite material and metal connection. The method comprises the following steps that a bulge structure is prefabricated on the surface of a joint of metal to be welded; working parameters of a laser welding following pressing working head are preset; under the action of the pressure of a front roller, metal in a to-be-welded area is tightly attached to a thermoplastic composite material; the surface of a metal material is heated by laser to melt a thermoplastic resin matrix of the thermoplastic composite material; and under the action of a pressure device and an ultrasonic vibration device of a rear roller, the bulge structure is embedded into the thermoplastic composite material, and the molten resin matrix flows, diffuses and fills the metal surface, so that laser connection of the thermoplastic composite material and the metal is realized. The method can realize the connection of the fiber reinforced thermoplastic composite material and a metal large-scale three-dimensional structural member in the fields of aerospace, automobiles and the like, effectively inhibits the generation of welding defects, ensures the welding quality, and improves the mechanical property of a welding joint.

Description

technical field [0001] The invention relates to the technical field of connecting thermoplastic composite materials and metals, in particular to a laser pressure welding method for fiber-reinforced thermoplastic composite materials and metals. Background technique [0002] Fiber-reinforced thermoplastic resin-based 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 indispensable and important structural materials for modern equipment due to their unique advantages such as maintainability, recyclability, low cost, and mature molding and processing techniques. In modern equipment manufacturing, more and more heterogeneous hybrid structures of composite materials and metal materials are used to achieve low-cost and lightweight manufacturing, so the connection between the two is inevi...

Claims

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Application Information

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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