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Stirring friction welding method with pre-welding and post-welding dual ultrasonic synchronous vibration assisting

A technology of synchronous vibration and auxiliary stirring, which is applied in the direction of welding equipment, non-electric welding equipment, manufacturing tools, etc., can solve the problems of adverse effects of ultrasonic vibration of the stirring head, complex installation mechanism, and influence of ultrasonic effects, etc., to expand the applicable scope, Effect of increasing welding speed and improving welding quality

Inactive Publication Date: 2014-07-02
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this design, the large axial pressure during welding will have an adverse effect on the ultrasonic vibration of the stirring head, which will seriously affect the actual effect of ultrasound. Currently, relevant reports are limited to thin plate welding
At the same time, when connecting the stirring head and the ultrasonic transducer horn as a whole, a complex installation mechanism is required

Method used

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  • Stirring friction welding method with pre-welding and post-welding dual ultrasonic synchronous vibration assisting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] combine figure 1 To illustrate this embodiment, a dual ultrasonic synchronous vibration-assisted friction stir welding method before welding and after welding described in this embodiment is realized through the following steps:

[0016] Step 1. Place the two plates 4.5 to be welded on the workbench in an overlapping or butt joint manner, and clamp them on the workbench with a clamp;

[0017] Step 2: Install the first ultrasonic transducer to convert the power frequency alternating current into an ultrasonic frequency high-frequency alternating signal, and then convert the electric energy into ultrasonic mechanical vibration energy through the transducer, and further amplify the amplitude through the horn, and then the first The output head 1 of an ultrasonic transducer first introduces the ultrasonic waves from the area to be welded 5mm in front of the stirring head. The output head 1 can move synchronously with the stirring head along the welding direction during the ...

Embodiment 2

[0020] combine figure 1 To illustrate this embodiment, a dual ultrasonic synchronous vibration-assisted friction stir welding method before welding and after welding described in this embodiment is realized through the following steps:

[0021] Step 1. Place the two plates 4.5 to be welded on the workbench in an overlapping or butt joint manner, and clamp them on the workbench with a clamp;

[0022] Step 2: Install the first ultrasonic transducer to convert the power frequency alternating current into an ultrasonic frequency high-frequency alternating signal, and then convert the electric energy into ultrasonic mechanical vibration energy through the transducer, and further amplify the amplitude through the horn, and then the first The output head 1 of an ultrasonic transducer first introduces the ultrasonic wave from the area to be welded 25mm in front of the stirring head. The output head 1 can move synchronously with the stirring head along the welding direction during the ...

Embodiment 3

[0025] In step 1 of this embodiment, the two plates to be welded are both non-ferrous metals. Other steps are the same as in Example 1.

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Abstract

The invention discloses a stirring friction welding method with pre-welding and post-welding dual ultrasonic synchronous vibration assisting. According to the method, the ultrasonic wave is exerted on a weld joint in the welding process, stirring friction welding with pre-welding and post-welding dual ultrasonic synchronous vibration assisting is achieved, the constitutive relation of a material is changed through the ultrasonic wave, the resistance to deformation of the material is lowered through the ultrasonic vibration exerted before welding, the welding resistance subjected by a stirring head in the welding process is reduced, the welding speed is improved, the welding quality is improved, and the applicable range of welding parameters is enlarged. Grain refinement is produced on the material in the weld joint area with the high temperature through the ultrasonic vibration exerted after welding, and the mechanical property of a connector is improved. By means of the split-type design of the stirring head and an amplitude-changing pole of an ultrasonic generator, the defect that the ultrasonic vibration of an integrally designed stirring needle is obstructed by huge down force can be avoided.

Description

technical field [0001] The invention relates to a material connection method, in particular to a method of friction stir welding assisted by double ultrasonic synchronous vibration before welding and after welding. Background technique [0002] As an advanced solid-phase joining technology, friction stir welding was invented by The Welding Institute (TWI) in 1991. Due to its low welding deformation, small residual stress and good joint quality, it does not require shielding gas and Filling materials can eliminate welding defects such as pores, inclusions, cracks, etc., and have many advantages such as no arc, smoke, noise pollution, etc. It has been widely used in many industrial manufacturing fields such as aerospace, aviation, shipbuilding, trains, automobiles, and electric power. It is called "one of the most revolutionary connection technologies of the 21st century". However, since friction stir welding is a solid-phase connection technology, the material does not melt ...

Claims

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Application Information

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IPC IPC(8): B23K20/02B23K20/12
CPCB23K20/122B23K20/10B23K20/26B23K28/02B23K2101/185
Inventor 黄永宪万龙吕世雄郭伟强吕宗亮王耀彬黄体方
Owner HARBIN INST OF TECH