Magnesium alloy/carbon steel pipe composite connection method based on induction heating and electromagnetic forming

An electromagnetic forming and induction heating technology, which is applied in the direction of welding/welding/cutting items, welding equipment, non-electric welding equipment, etc., can solve the problems of limited product size, poor mechanical properties, product scrapping, etc., so as to facilitate automatic control, Effects of improving connection efficiency and improving connection formability

Active Publication Date: 2015-03-04
WUHAN UNIV OF TECH
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main processing method of magnesium alloy is die casting, but the magnesium alloy products after plastic processing have a broader application prospect. Although the casting performance of magnesium alloy is excellent, it can be cast into various parts with complex shapes, but there are also product specifications and sizes. Limited, poor me

Method used

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  • Magnesium alloy/carbon steel pipe composite connection method based on induction heating and electromagnetic forming
  • Magnesium alloy/carbon steel pipe composite connection method based on induction heating and electromagnetic forming
  • Magnesium alloy/carbon steel pipe composite connection method based on induction heating and electromagnetic forming

Examples

Experimental program
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Example Embodiment

[0029] Example 1. Composite connection method of magnesium alloy / carbon steel pipe fittings based on induction heating and electromagnetic forming

[0030] For the composite connection method of magnesium alloy / carbon steel pipe fittings based on induction heating and electromagnetic forming, see figure 1 Specifically, the electromagnetic induction heating coil and the electromagnetic forming coil are the same coil device, and the electromagnetic forming machine capacitor charging and electromagnetic induction heating can simultaneously perform the heating process of the magnesium alloy inner tube. First, the capacitor 4 is charged through the control circuit of the electromagnetic forming machine, and the second vacuum switch 6 is turned on, so that the electromagnetic induction heating device can heat the magnesium alloy inner tube. Through process control, when the capacitor 4 is fully charged, the magnesium alloy The alloy inner tube is heated to the specified temperature at t...

Example Embodiment

[0045] Example 2 Using AZ31 magnesium alloy tube as a warm magnetic pulse connection experiment

[0046] 1. Experimental process:

[0047] (1) Material preparation:

[0048] The materials used in the experiment were commercially available AZ31 magnesium alloy pipe and 20 carbon steel. The chemical composition of the magnesium alloy is shown in Table 1. The magnesium alloy tube used in the experiment was annealed, the annealing temperature was 300℃, and the temperature was kept for 0.5h and then cooled in the furnace.

[0049] (2) Forming process:

[0050] The magnetic pulse connection test is such as image 3 The tooling structure is shown. The electromagnetic forming coil used in the experiment is such as Figure 4 with Figure 5 As shown, the coil interface is a rectangle of 2×5 mm and is machined from a copper tube. The number of turns of the coil is n=20, the outer diameter of the coil is 80mm, the inner diameter D is 78mm, and the width is 60mm. The thickness of the pipe is 1mm ...

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Abstract

The invention relates to a magnesium alloy/carbon steel pipe composite connection method based on induction heating and electromagnetic forming. A warm electromagnetic forming method is utilized to increase the magnesium alloy forming performance, additionally, electromagnetic induction heating and electromagnetic forming are combined, the induction heating and forming functions are realized by utilizing a same coil, so as to increase the connecting efficiency of a heterogeneous metal tube and facilitate the automation control, and additionally, a warm forming process and an electromagnetic forming process are combined during forming, so that the connecting forming performance is increased. According to the magnesium alloy/carbon steel pipe composite connection method, a magnesium alloy pipe is overlapped with a carbon steel pipe, and after the magnesium alloy inner pipe reaches the set temperature through the electromagnetic induction heating of the coil, the magnesium alloy inner pipe is discharged by the electromagnetic forming coil, so that severe plastic deformation of the magnesium alloy inner pipe occurs, and the magnesium alloy inner pipe after plastic deformation collides and connects with an outer pipe. According to the method, the electromagnetic forming coil is instantaneously discharged through an energy storage capacitor, so as to generate a strong pulsed magnetic field, so that the warm inner pipe is formed at high speed under the action of electromagnetic force and collides with the carbon steel outer pipe with higher rigidity at high speed to generate combination.

Description

technical field [0001] The invention relates to an electromagnetic connection technology for dissimilar metal alloy pipe fittings, specifically an induction heating and electromagnetic forming composite connection method for lap joints of magnesium alloy / carbon steel pipe fittings, which is mainly used in the connection technology of magnesium alloy pipe fittings and carbon steel pipe fittings. Background technique [0002] In recent years, the problems of environmental pollution and resource consumption have become increasingly serious. With the rapid development of the automobile industry, automobile exhaust emissions and fuel utilization have increasingly attracted social attention, and automobile lightweight has become the development trend of the automobile industry. Lightweight, The application of high-strength difficult-to-form materials in advanced manufacturing fields such as automobiles, aviation, and aerospace is increasing. [0003] Magnesium and its alloys are ...

Claims

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Application Information

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IPC IPC(8): B23K20/06B23K20/26B23K103/18
CPCB23K20/06B23K20/227B23K2103/18
Inventor 孟正华杨鹏黄尚宇雷雨胡建华
Owner WUHAN UNIV OF TECH
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