A method for friction stir nested connection of metal and polymer sheets

A metal sheet and friction stir technology, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems of poor welding forming and low mechanical properties of joints, and achieve good plastic flow, which is conducive to process expansion and convenient improvement. Effect

Active Publication Date: 2021-12-28
SHENYANG AEROSPACE UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the friction stir welding of metal and polymer materials, due to the large difference in thermophysical properties of the two materials, the welding form is poor and the mechanical properties of the joint are low.

Method used

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  • A method for friction stir nested connection of metal and polymer sheets
  • A method for friction stir nested connection of metal and polymer sheets
  • A method for friction stir nested connection of metal and polymer sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A friction stir nested joining method of metal and polymer sheets, such as figure 1 and figure 2 shown, including the following steps:

[0029] Step 1. Cut the boss 1 of the AZ31 magnesium alloy plate with a size of 180×100×4mm to be connected to form a dovetail groove 2 through a wire saw machine, and cut the dovetail groove 2 of the polypropylene polymer plate with a size of 180×100×2mm. The connecting side is cut and processed into a dovetail-shaped protrusion 3 by a wire saw machine, wherein the cross-section of the dovetail groove 2 is trapezoidal with a short side length of 6 mm and a long side of 16 mm. Surface form, the height of the boss 1 on both sides is 0.2mm, and the width is 10mm;

[0030] Step 2. Clean the joint surface of the processed magnesium alloy plate and the polypropylene polymer plate with acetone and wipe it with absolute ethanol. After drying, place the dovetail groove 2 of the magnesium alloy plate and the polypropylene polymer plate The d...

Embodiment 2

[0034] A friction stir nested joining method of metal and polymer sheets, such as image 3 and Figure 4 shown, including the following steps:

[0035] Step 1. Process the boss 1 of the short carbon fiber reinforced PEEK composite material plate with a size of 200×100×2.8mm to be connected to a circular arc-shaped groove 4, and the side to be connected of the nylon material plate with a size of 200×100×2mm Processed into an arc-shaped protrusion 5, wherein the radius of the arc-shaped groove 4 is 5mm, the arc-shaped protrusion 5 is a 270° arc, the boss 1 is double-sided, and the height of the boss 1 on both sides is 0.2mm , the width is 20.2mm;

[0036] Step 2. Clean the joint surface of the processed PEEK composite material plate and the nylon material plate with acetone and wipe it with absolute ethanol. 5 fit and connect, and fix it on the welding workbench of the friction stir welding machine, fix the PEEK composite material plate and the nylon material plate through th...

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Abstract

A friction stir nested connection method for metal and polymer plates, belonging to the technical field of composite material connection, the connection method is as follows: the butt joint sides of the metal and polymer material plates are respectively processed into groove-shaped structures and convex-shaped structures for matching The upper and lower surfaces of the joint of the metal sheet are processed with bosses of a certain width and height; the metal and polymer sheets are connected and fixed on the welding table through a groove-like structure and a raised-like structure; a rotating stirring head is used Perform friction stir processing on the bosses on the upper and lower surfaces of the metal plate, and use the metal side as the advancing side of the stirring head; as the rotating stirring head and the surface of the boss material rub against to generate heat, the metal material at the boss is fully softened to a plastic flow state, and the stirring The plasticized material in front of the head is transferred from the forward side to the backward side with the drive of the stirring head, covering and wrapping the connection part, forming a box-shaped friction stirring nested joint, and improving the current situation of low connection strength between metal and polymer materials.

Description

technical field [0001] The invention belongs to the technical field of connection of composite materials, and in particular relates to a friction stirring nested connection method of metal and polymer plates. Background technique [0002] As a structural material, polymer materials (including polymer-based composite materials) have a series of advantages such as light weight, high specific strength, high specific stiffness, and good corrosion resistance. They can replace metal materials to achieve lightweight design of structures. Therefore, it has a good application prospect. In the design of lightweight mechanical structures, it is inevitable to encounter the connection problem of metal and polymer materials. At present, the connection of metal and polymer materials mainly uses mechanical connection (riveting, screwing, etc.), adhesive bonding and welding as the main means. The operation of mechanical connection and bonding process is relatively simple, but there are als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
CPCB23K20/122B23K20/129
Inventor 姬书得李鸣申马琳熊需海张利国吕赞杨康宋崎
Owner SHENYANG AEROSPACE UNIVERSITY
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