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Method for connecting thermoplastic composite with metal

A technology of composite materials and connection methods, which is applied in the field of connection between carbon fiber thermoplastic composite materials and metals, can solve the problems of implanting electromagnetic sensitive materials, and achieve the effects of avoiding electromagnetic sensitive materials, fast connection speed and simple equipment

Active Publication Date: 2016-11-16
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that electromagnetic sensitive materials need to be implanted in the conventional induction welding process, the invention provides a method for connecting thermoplastic composite materials and metals, which uses induction welding to realize the connection between thermoplastic composite materials and metals

Method used

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  • Method for connecting thermoplastic composite with metal
  • Method for connecting thermoplastic composite with metal
  • Method for connecting thermoplastic composite with metal

Examples

Experimental program
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Embodiment 1

[0022] Example 1: Combination figure 1 and figure 2 Describe the embodiment, this embodiment is realized through the following steps:

[0023] Step 1. Use physical or chemical methods to roughen the to-be-welded surface of the metal piece, clean it up and dry it. For metal parts that are prone to electrochemical corrosion with carbon fiber composite materials, such as aluminum alloys, magnesium alloys, etc., measures such as anodizing or coating should be used to protect them. In the figure, workpiece 1 is a metal part, and workpiece 2 is a thermoplastic composite part. In such a tooling position, the skin depth of the induction magnetic field into the metal piece should preferably be smaller than the thickness of the metal piece, the induced current is concentrated on the upper surface of the workpiece 1, and the heat generated by the induction heating is also concentrated on this surface. Therefore, the heating rate of metal parts and the efficiency of induction heating ...

Embodiment 2

[0031] Example 2: Combination figure 1 and image 3The embodiment is described. In this embodiment, the workpiece 2 is a thermoplastic composite material, and the workpiece 1 is a metal part. In such a tooling position, the skin depth of the magnetic field into the metal part should be preferably greater than the thickness of the metal part. At this time, the induced current is distributed in the entire workpiece 1, and the heat generated by induction heating is distributed in the metal part. Therefore, the heating speed of the metal parts and the efficiency of induction heating can be guaranteed. Other steps are identical with embodiment 1.

[0032] The workpiece 1 is close to the induction coil in this tooling position, and the distance between the induction coil and the workpiece 1 is not affected by other workpieces, so the heating efficiency of the induction magnetic field to the workpiece 1 is relatively high. However, since the heat generated by induction heating nee...

Embodiment 3

[0034] A method for connecting a thermoplastic composite material to a metal, comprising the steps of:

[0035] Step 1. Roughen the surface of the metal part to be welded and the thermoplastic composite material part to be welded, clean and dry; the material of the metal part can be steel, aluminum alloy, magnesium alloy, titanium, nickel and other metals One of. For metal parts that are prone to electrochemical corrosion with reinforcing fibers, such as aluminum alloys, magnesium alloys and carbon fibers, etc., measures such as anodic oxidation or coating should be used to protect them;

[0036] The material of the thermoplastic composite material used should be fiber-reinforced thermoplastic resin composite material, and the material of thermoplastic composite material part should be fiber-reinforced thermoplastic resin composite material. The fiber-reinforced thermoplastic resin composite material consists of reinforcing fiber, matrix resin, auxiliary materials (Auxiliary ...

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Abstract

The invention relates to the field of connecting of dissimilar materials. A method for connecting a thermoplastic composite with metal comprises the following steps that firstly, a to-be-welded surface of a to-be-welded metal piece and a to-be-welded surface of a to-be-welded thermoplastic composite piece are roughened; secondly, the to-be-welded metal piece and the to-be-welded thermoplastic composite piece are spliced together and fixed; thirdly, an induction heating device is placed above a welding area; fourthly, induction current generated in the metal piece by a magnetic field at the end of a coil is used for heating the metal piece, and matrix resin in the thermoplastic composite absorbs heat to be molten; and fifthly, the induction heating device is started, the coil of the induction heating device is moved in the welding direction, the molten matrix resin is cooled, a connector between the molten matrix resin and the metal piece is formed, and continuous welding of the thermoplastic composite and the metal is achieved. According to the method for connecting the thermoplastic composite with the metal, acceleration is high, equipment is simple, the method can be applied to welding of large three-dimensional curved-surface components in complex shapes, and meanwhile, use of electromagnetic sensitive materials is avoided.

Description

technical field [0001] The invention relates to the field of connection of dissimilar materials, in particular to a connection method of carbon fiber thermoplastic composite material and metal. Background technique [0002] Thermoplastic composite materials have significant advantages such as high specific strength and specific modulus, excellent impact resistance, fatigue resistance, water resistance and fatigue resistance, repeatable processing, high forming processing efficiency, and low forming processing cost. Therefore, thermoplastic composite materials have broad application prospects in aerospace, wind power generation, transportation and other fields. The application of thermoplastic composite materials will inevitably generate connection problems with traditional metal materials such as steel and aluminum alloys. The welding of thermoplastic composite materials does not use adhesives, and only the resin on the surface of the composite material is melted and welded...

Claims

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Application Information

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IPC IPC(8): B29C65/04B29C65/46
CPCB29C65/04B29C65/46B29C66/1122B29C66/43B29C66/742B29C66/832
Inventor 宋燕利华林郭巍杨龙
Owner WUHAN UNIV OF TECH
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