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Friction stir welding device and method by applying ultrasonic vibration from bottom

An ultrasonic vibration and friction stir technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of different ways of applying ultrasonic vibration energy and different effects, so as to improve joint performance, enhance flow, reduce The effect of weak connection tendency

Inactive Publication Date: 2016-03-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the way of applying ultrasonic vibration energy is different, and its effect is also different.

Method used

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  • Friction stir welding device and method by applying ultrasonic vibration from bottom

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specific Embodiment approach 1

[0018] Specific implementation mode one: combine figure 1 Describe this embodiment, this embodiment comprises a stirring head 1, a workbench 2, a support base 4, a clamping tool 5 and an ultrasonic vibration device 6,

[0019] The worktable 2 processes a rectangular groove 3 along the welding direction; a support base 4 is arranged in the rectangular groove 3, and the upper end surface of the support base 4 is at the same height as the upper end surface of the workbench 2, and a circular through hole is processed in the center of the support base 4, During the welding process, the pressure from the axial direction is mainly borne by the support base 4; the ultrasonic vibration device 6 is fixed below the workbench 2 and coaxially arranged with the circular through hole in the center of the support base 4. During the welding process, the ultrasonic vibration device 6 will Ultrasonic vibration energy is vertically applied to the workpiece 7 around the stirring needle from the bo...

specific Embodiment approach 2

[0020] Specific implementation mode two: combination figure 1 Describe this embodiment, the welding method of this embodiment comprises the following steps:

[0021] Step 1. Fixing the support base:

[0022] Fix the support base 4 in the rectangular groove 3 of the workbench, the support base 4 is at the same height as the workbench 2, and keep a gap of 1-5 mm between the two sides of the support base 4 and the two sides of the rectangular groove 3 to prevent mutual friction during welding, support The through hole on the base 4 is located directly below the stirring head 1;

[0023] Step 2. Fixing of the ultrasonic vibration device:

[0024] Fix the ultrasonic vibration device 6 below the support base 4, the end of the ultrasonic vibration device 6 enters the central through hole of the support base 4, and the upper end surface of the ultrasonic vibration device 6 is on the same level as the upper end surface of the workbench 2, and the end Maintain a transition fit with t...

specific Embodiment approach 3

[0027] Specific implementation mode three: combination figure 1 To describe this embodiment, the power supply of the ultrasonic vibration device 6 in Step 3 of this embodiment is 2000W. With such arrangement, more ultrasonic vibration energy can be applied to the weld seam from the bottom within the range that the workpiece 7 to be welded can bear. Other compositions and connections are the same as those in the second embodiment.

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Abstract

The invention discloses a friction stir welding device and a friction stir welding method by applying ultrasonic vibration from the bottom, and relates to a friction stir welding device and a friction stir welding method. According to the friction stir welding device and the friction stir welding method, ultrasound is applied to to-be-welded workpieces around a stirring pin from the bottom, and the metal deformation resistance is reduced by utilizing the ultrasonic vibration, so as to promote metal flow at the root of weld and reduce the tendency of weak connections, thereby achieving the purpose of increasing the welding quality. According to the device, a rectangular groove is processed in a workbench along a welding direction, a support base is arranged in the rectangular groove, a circular through hole is processed in the center of the support base, and in a welding process, axial pressure is mainly born by the support base; an ultrasonic vibration device is fixed below the workbench, and in the welding process, ultrasonic vibration energy is vertically applied to the to-be-welded workpieces around the stirring pin from the bottom by the ultrasonic vibration device. The method comprises the steps of (1) fixing the support base; (2) fixing the ultrasonic vibration device; (3) performing friction stir welding. The device and the method are used in the field of welding.

Description

technical field [0001] The invention relates to a friction stir welding device and method, in particular to a friction stir welding device and method with ultrasonic vibration applied to the bottom, and belongs to the field of welding technology. Background technique [0002] Friction stir welding is a new type of solid phase joining technology, which has the advantages of small welding deformation, high joint quality and green energy saving. However, the "funnel-shaped" temperature distribution inside the weld is an inherent feature of friction stir welding, which makes the root temperature of the weld lower and the plastic metal flow is insufficient, which easily leads to defects such as weak connections at the root of the weld, thereby reducing the mechanical properties of the joint . [0003] In the friction stir welding process, the external ultrasonic vibration energy is introduced into the weld, which can not only reduce the metal flow stress, promote the metal flow,...

Claims

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Application Information

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IPC IPC(8): B23K20/12B23K20/10
CPCB23K20/122B23K20/10
Inventor 刘会杰胡琰莹曾凡勇王欢李继超
Owner HARBIN INST OF TECH
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