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Thermosetting polymer matrix composite resistance welding device and method

A composite material and resistance welding technology, which is applied in the field of thermosetting polymer-based composite material resistance welding devices, can solve the problems that the fusion connection technology cannot be applied to thermosetting polymer-based composite materials, current leakage, etc., to improve edge effects and current leakage, Reduced edge effects and uniform temperature distribution

Inactive Publication Date: 2014-12-24
XI AN JIAOTONG UNIV
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Problems solved by technology

[0010] The purpose of the present invention is to provide a resistance welding method for thermosetting polymer-based composite materials, so as to solve the problem that the fusion joining technology cannot be applied to thermosetting polymer-based composite materials, and at the same time, it can effectively solve the current leakage and edge effect during welding problem, improved welding quality

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  • Thermosetting polymer matrix composite resistance welding device and method
  • Thermosetting polymer matrix composite resistance welding device and method
  • Thermosetting polymer matrix composite resistance welding device and method

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] see figure 1 , the thermosetting polymer-based composite material resistance welding device of the present invention includes a housing 2 and a heating resistor 14 arranged in the housing 2, an insulating and heat-insulating jig 5 for placing the heating resistor 14, and an insulating and heat-insulating fixture 5 for placing the thermosetting polymer-based composite material. A pressurizing device that applies a pressure of 0.4 to 1.0 MPa to the welded part 13. The pressurizing device adopts the piston rod head 3 connected to the manual hydraulic pump 1. A pressure gauge is provided on the top of the piston rod head 3. Both sides of the heating resistor 14 are covered with a layer of thickness It is a thermoplastic film of 50-100 μm; the heating resistor 14 adopts unidirectional and / or woven carbon fiber cloth, and the two sides of the heating resistor ...

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Abstract

The invention discloses a thermosetting polymer matrix composite resistance welding device and method. A layer of thermoplastic bonding agent is co-cured on the surface of a thermosetting polymer matrix composite structural part to obtain a weld part, resistance welding of a thermosetting polymer matrix composite is realized, the welding device adopts a general thermosetting polymer matrix composite resistance welding method and is improved: firstly, a pressurizing device is used for exerting pressure on the weld part, a heating resistor connected onto copper plate wire clamps is charged with currents, a cooling fan is switched on to perform active cooling on two ends simultaneously, after a temperature controller detects that the welding interface temperature reaches 200 DEG C through K-thermocouples, a direct-current stabilized power supply is switched off, the welding interface temperature is reduced, and a final welded joint is formed through cooling. With the adoption of the welding method, the fringe effect can be effectively reduced, uniform temperature distribution is realized, the welding stress is reduced, and the energy consumption is reduced.

Description

technical field [0001] The invention relates to a resistance welding method for composite materials, in particular to a resistance welding device and method for thermosetting polymer-based composite materials. Background technique [0002] Polymer matrix composites have the characteristics of high specific strength, high specific stiffness, good fatigue resistance, light weight, good designability, chemical corrosion resistance, good dielectric properties, and easy integral molding, etc., and are increasingly used in Aerospace, transportation, construction industry, medical equipment and other fields. Among them, the thermosetting polymer matrix is ​​widely used in the field of lightweight structural parts manufacturing, especially in the field of aerospace, due to its excellent comprehensive performance, good manufacturability, and low price. Taking A400M and Boeing 787 aircraft as examples, composite materials account for the 36% and 50% by weight of the structure, where ...

Claims

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Application Information

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IPC IPC(8): B29C65/34B29K101/10
Inventor 谢磊刘洪波刘鹤峰段玉岗李涤尘
Owner XI AN JIAOTONG UNIV
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