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Hot-gas welding method for resin-based composite and light alloy

A composite material and light alloy technology, applied in the field of thermoplastic resin matrix composite material-light alloy connection process, can solve the problem of insufficient resin filling at the joint interface, improve mechanical properties, avoid agglomeration, physical adsorption and chemical bonds. The effect of synergistic enhancement

Pending Publication Date: 2021-04-09
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the problems existing in the prior art, the present invention provides a hot gas welding method for resin-based composite materials and light alloys. The purpose of the present invention is to overcome the defect of insufficient resin filling at the joint interface during the hot-gas welding of resin-based composite materials, and to realize Resin Matrix Composites - High Strength Connections of Lightweight Alloys

Method used

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  • Hot-gas welding method for resin-based composite and light alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 As shown, a PEI film 3 with a thickness of 0.20mm is placed on the overlapping area of ​​glass fiber reinforced polyetherimide thermoplastic resin matrix composite material (GF / PEI) 4-aluminum alloy 2, and the resin matrix composite material is placed in the lower part , the light alloy is placed on the upper part, the welded joint is constructed, and the welded piece to be processed is obtained; a pressure of 0.3 MPa is applied above the overlapping area by a press, the heat gun 1 is turned on, and the position of the joint to be welded is aligned, and the temperature is adjusted so that the welded area The maximum temperature reaches 400°C, and the welding time is 120s; during the welding process, the ultrasonic transducer 5 is used to apply ultrasonic energy with a vibration frequency of 10K Hz and an amplitude of 2μm on the thermoplastic resin matrix composite material, and the introduction of ultrasonic time is 5s; after cooling , the GF / PEI thermopla...

Embodiment 2

[0031] A PEI film with a thickness of 0.25 mm was placed on the overlapping area of ​​carbon fiber reinforced polyetherimide thermoplastic resin matrix composite (CF / PEI)-aluminum alloy, where the resin matrix composite material was placed on the lower part and the light alloy was placed on the upper part , construct the welded joint, and obtain the weldment to be processed. Use a press to apply a pressure of 0.3MPa above the overlapping area, turn on the heat gun, aim at the position of the joint to be welded, adjust the temperature so that the maximum temperature of the welding area reaches 400°C, and the welding time is 150s; during the welding process, the ultrasonic transducer is used The device applies ultrasonic energy with a vibration frequency of 10K Hz and an amplitude of 2μm to the thermoplastic resin matrix composite material, and the ultrasonic energy is introduced for 5s; after cooling, the CF / PEI thermoplastic resin matrix composite material-aluminum alloy high-e...

Embodiment 3

[0033] A PPS film with a thickness of 0.15mm was placed on the overlapping area of ​​carbon fiber reinforced polyphenylene sulfide thermoplastic resin matrix composite (CF / PPS)-aluminum alloy, in which the resin matrix composite material was placed on the lower part and the light alloy was placed on the upper part. Construct the welded joint to obtain the weldment to be processed. Use a press to apply a pressure of 0.3MPa above the overlapping area, turn on the heat gun, aim at the position of the joint to be welded, adjust the temperature so that the maximum temperature of the welding area reaches 250°C, and the welding time is 180s; during the welding process, the ultrasonic transducer is used The device applies ultrasonic energy with a vibration frequency of 10K Hz and an amplitude of 2 μm to the thermoplastic resin matrix composite material, and the ultrasonic energy is introduced for 8s; after cooling, the CF / PPS thermoplastic resin matrix composite material-aluminum alloy...

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Abstract

The present invention provides a hot-gas welding method for a resin-based composite and a light alloy. The hot-gas welding method includes the following steps: step 1, constructing a welding joint: putting a thermoplastic resin film into a joint area of a resin-based composite and a light alloy which are to be welded; step 2, performing ultrasonic-assisted hot-gas welding: applying a pressure to the upper portion of the joint area, starting a heat gun to adjust the temperature to enable the highest temperature in a welding area to be 160-500 DEG C for welding, and meanwhile, applying ultrasonic vibration in the welding process; and after welding is ended, performing cooling to obtain a resin-based composite-light alloy welded joint. Ultrasonic waves are applied to a hot-gas welding process of the composite and the light alloy through ultrasound, ultrasonic vibration is adopted for assisting hot-gas welding of the resin-based composite, the flowing and joint filling capacities of thermoplastic resin are improved by virtue of ultrasonic wave energy, and then, a composite welding joint with higher mechanical properties is constructed.

Description

technical field [0001] The invention relates to a connection process of a thermoplastic resin-based composite material and a light alloy, in particular to a hot gas welding method for a resin-based composite material and a light alloy. Background technique [0002] Resin-based composite materials are one of the main structural materials of aerospace vehicles; the connection between composite material structures is a key technology in the manufacturing process of aircraft. Mechanically fastened connections, welding and adhesive bonding techniques are the two most commonly used joining methods. However, mechanical fastening connections such as bolting and riveting require drilling of composite materials, which affects the mechanical strength of the body. At the same time, bolts or rivets increase the overall weight of the structural parts; welding techniques and bonding make the composite structure non-detachable. Overall, the construction process requires high precision and ...

Claims

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Application Information

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IPC IPC(8): B29C65/72B29C65/08B29C65/10
CPCB29C65/72B29C65/08B29C65/10B29C66/1122B29C66/7422
Inventor 崔旭田琳王道晟赵普蒲永伟熊需海孟庆实王朔李晓东张辰许鹏贺军李威
Owner SHENYANG AEROSPACE UNIVERSITY
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