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Welding method for thermoplastic composite material

A composite material and welding method technology, which is applied in the field of welding, can solve the problems of unsmooth welding process and poor welding quality, and achieve the effect of fast heating speed, good welding quality and uniform weld seam

Active Publication Date: 2015-05-20
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a welding method for thermoplastic composite materials, which solves the problem that the welding process cannot be carried out smoothly or the welding quality is poor due to the welding of thermoplastic composite materials by laser

Method used

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  • Welding method for thermoplastic composite material
  • Welding method for thermoplastic composite material
  • Welding method for thermoplastic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Grinding and roughening the surface to be welded of the aluminum alloy workpiece, cleaning it with acetone and blowing it dry;

[0052] (2) Clean and dry the surface to be welded of the PE-polyethylene workpiece reinforced by carbon fiber;

[0053] (3) According to figure 1 In the way shown, the aluminum alloy workpiece is placed on the carbon fiber reinforced PE-polyethylene workpiece for lap joint, so that the surfaces to be welded of the two are in contact with each other;

[0054] (4) Fix the aluminum alloy workpiece to be welded and the PE-polyethylene workpiece reinforced by carbon fiber with a clamp, and apply a pressure of 20N to the aluminum alloy workpiece and the PE-polyethylene workpiece reinforced by carbon fiber by the clamp;

[0055] (5) Focus the laser and heat it on the surface of the aluminum alloy, and scan along the preset path at a speed of 5m / s;

[0056] (6) After scanning, turn off the laser, remove the fixture, and complete the welding proc...

Embodiment 2

[0058] (1) The surface to be welded of the PC-polycarbonate workpiece reinforced by boron fiber and the polyphenylene ether workpiece reinforced by graphite fiber is cleaned and dried with acetone;

[0059] (2) Grinding and roughening the surfaces of two aluminum alloy transition pieces with a thickness of 3 cm, cleaning them with acetone and blowing them dry;

[0060] (3) According to figure 2 In the manner shown, the surfaces to be welded of the boron fiber-reinforced PC-polycarbonate workpiece and the graphite fiber-reinforced polyphenylene ether workpiece are butted; and aluminum alloy transition pieces are attached to both sides of the butt joint area and fixed with a clamp. At the same time, apply a pressure of 10N to the metal transition piece through the clamp;

[0061] (5) After focusing the laser, heat the surface of the aluminum alloy transition piece on both sides of the docking area in turn, and scan along the preset path at a speed of 8m / s;

[0062] (6) After ...

Embodiment 3

[0064] (1) The surface to be welded of the PE-polyethylene workpiece reinforced by boron fiber and the PE-polyethylene workpiece reinforced by graphite fiber is cleaned and dried with acetone;

[0065] (2) Polish the surface of two aluminum alloy transition pieces with a thickness of 3 cm, clean them with acetone and dry them. One of the aluminum alloy transition pieces is a straight piece, and the other aluminum alloy transition piece has a certain bending angle;

[0066] (3) According to image 3 In the manner shown, fillet joint the surfaces to be welded of the boron fiber reinforced PE-polyethylene workpiece and the graphite fiber reinforced PE-polyethylene workpiece; and attach aluminum alloy transition pieces on both sides of the junction area, and fix them with clamps , while applying a pressure of 25N to the metal transition piece through the clamp;

[0067] (4) After the laser is focused, it is sequentially heated on the surface of the aluminum alloy transition piece...

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Abstract

The invention discloses a welding method for a thermoplastic composite material. The welding method comprises the following steps: S1: pre-treating a surface to be welded of a first workpiece and a surface to be welded of a second workpiece, wherein the first workpiece is the thermoplastic composite material and the second workpiece is the thermoplastic composite material or a metal material; and S2: welding and fixing the surface to be welded of the first workpiece and the surface to be welded of the second workpiece to obtain a combined body to be welded, wherein the metal material is arranged in the combined body to be welded, focusing laser and scanning the surface of the metal material in the combined body to be welded according to a pre-set path to finish a welding process. According to the welding method, the thermoplastic composite material and the thermoplastic composite material, and the thermoplastic composite material and the metal material are smoothly welded by the laser; welding lines are uniform and the welding quality is high; and the welding method has a wide application prospect in the fields of new energy source automobiles, unmanned aerial vehicles, and aviation fields.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a welding method for thermoplastic composite materials. Background technique [0002] At present, thermoplastic composite materials are mainly welded by resistance implant welding, electromagnetic induction welding and ultrasonic welding. Among them, the resistance implantation welding process is simple, the equipment is flexible, and no surface treatment is required, but during the welding process, the welding head will introduce impurities, thereby reducing the fatigue performance of the welding head and the uniformity of electrical properties; electromagnetic induction welding can be carried out continuously Welding, however, has problems such as high cost of implanted materials, filler materials affecting welding strength, and difficulty in welding structures with complex welding surfaces; ultrasonic welding has the advantages of high welding efficiency and high joint streng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/16
Inventor 焦俊科王飞亚王欣张文武
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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