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Friction stir welding method for realizing back follow-up support through magnetic force

A friction stir, welding method technology, applied in welding equipment, non-electric welding equipment, metal processing equipment and other directions, can solve the problems of low viscosity, easy softening, difficult to achieve plastic material wrapping, etc., to achieve flexible replacement and eliminate arc-shaped defects , the effect of eliminating root defects

Inactive Publication Date: 2019-07-05
HARBIN INST OF TECH
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Problems solved by technology

During the welding process, the welding tool is directly inserted into the workpiece to be welded, and the lower support acts as a support and prevents the material from overflowing, thereby eliminating root defects. However, due to the low viscosity of the polymer matrix composite material and its easy softening when heated, self-supporting welding tools are difficult Realize the wrapping of plastic materials

Method used

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  • Friction stir welding method for realizing back follow-up support through magnetic force
  • Friction stir welding method for realizing back follow-up support through magnetic force

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Embodiment Construction

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0026] see figure 1 Describe this embodiment, a method of friction stir welding that realizes the back follow-up support through magnetic force, which includes the following steps:

[0027] Step 1: Clean up before welding, use an organic solvent or cleaning agent to wipe the plate to be welded to remove surface debris, and the plate to be welded is a thermoplastic polymer or thermoplastic polymer composite material plate;

[0028] Step 2: Use fixtures to clamp the plates to be welded so that the butt surfaces of the plates to be welded are close to each other;

[0029] Step 3: Nest the electromagnetic device 2 on the outside of the stirring head 1, the electromagnetic device 2 is connected to the welding machine and follows the stirring head 1 to perform synchronous plane movem...

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Abstract

The invention provides a friction stir welding method for realizing back follow-up support through magnetic force, belongs to the field of friction stir welding, and particularly relates to the friction stir welding method for realizing back follow-up support through the magnetic force. The problems that existing friction stir welding of a thermoplastic polymer and a composite material of the thermoplastic polymer is poor in welding seam forming and the incomplete root penetration defect exists are solved. The method comprises the following steps of cleaning before welding, clamping of a to-be-welded plate, installing of a magnetic device, positioning and installing of a lower supporting body, friction stir welding with back follow-up support and the like. The method is mainly used for eliminating the welding defects of friction stir welding of the thermoplastic polymer and the composite material of the thermoplastic polymer.

Description

technical field [0001] The invention belongs to the field of friction stir welding, and in particular relates to a friction stir welding method which realizes back follow-up support through magnetic force. Background technique [0002] Polymers and their composite materials have many advantages such as high specific strength and specific modulus, good corrosion resistance and small linear expansion coefficient, and have been widely used in aerospace, automobiles, ships, electronic appliances and other fields. Therefore, the connection of polymers and their composites has received extensive attention from scholars, which are mainly divided into adhesive bonding, mechanical connection and welding. Generally speaking, the operation of mechanical connection is relatively simple, but stress concentration is prone to occur at the connection part, which reduces reliability, and the connection increases the weight of the joint, which is not conducive to lightweight design; the bondi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K20/26
CPCB23K20/12B23K20/26
Inventor 黄永宪孟祥晨谢聿铭李峻臣
Owner HARBIN INST OF TECH
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