Ultrasonic vibration assisted friction welding method

A technology of ultrasonic vibration and friction welding, used in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve problems such as poor strength of welded joints, and achieve the effect of improving strength, effective connection, and promoting plastic deformation.

Inactive Publication Date: 2021-01-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the deficiency of poor strength of welded joints in the existing assisted friction welding method, the present invention provides an ultrasonic vibration assisted friction welding method

Method used

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  • Ultrasonic vibration assisted friction welding method
  • Ultrasonic vibration assisted friction welding method
  • Ultrasonic vibration assisted friction welding method

Examples

Experimental program
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Effect test

Embodiment 1

[0024]Example 1: Referencefigure 1 The specific steps of the ultrasonic vibration assisted friction welding method of this embodiment are as follows:

[0025]Step 1. Clamp the rotating end work piece 1 and the moving end work piece 2 respectively on the rotating fixture and the moving fixture of the rotary friction welding machine;

[0026]Step 2. The rotary friction welding machine drives the rotating end workpiece 1 to rotate through the spindle motor and the rotating fixture, and the mobile end hydraulic system drives the mobile end workpiece 2 through the sliding table and the mobile fixture to gradually approach and press on the high-speed rotating rotating end workpiece 1, friction The pressure is 50~350MPa, the friction deformation is 1.0~3.0mm, and the friction time is 3~12s. At the same time, the ultrasonic transducer output head 3 is pressed on the mobile end workpiece 2, and ultrasonic vibration is applied to the mobile end workpiece 2. The frequency is 20-100kHz; when any para...

Embodiment 2

[0027]Example 2: ReferenceFigure 2-3On the basis of embodiment 1, the mobile end workpiece 2 is restricted, and the remaining welding methods are the same. The specific steps of the ultrasonic vibration assisted friction welding method of this embodiment are as follows:

[0028]Step 1. Clamp the rotating end work piece 1 and the moving end work 2 on the rotating fixture and the moving fixture of the rotary friction welding machine respectively, and put the restraint sleeve 4 on the moving end work piece 2, the restraining sleeve 4 and the moving end work piece 2 The gap is 0.2~0.5mm, and the welding surface of the workpiece 2 at the moving end extends out of the restraint sleeve 4 by 4.0~4.2mm;

[0029]Step 2. The rotary friction welding machine drives the rotating end workpiece 1 to rotate through the spindle motor and the rotating fixture, and the mobile end hydraulic system drives the mobile end workpiece 2 through the sliding table and the mobile fixture to gradually approach and pres...

Embodiment 3

[0030]Example 3: ReferenceFigure 4 On the basis of Example 1, the rotary friction welding machine was replaced with a linear friction welding machine, and the rotary clamp was replaced with a vibration clamp. The specific steps of the ultrasonic vibration assisted friction welding method of this embodiment are as follows:

[0031]Step 1. Clamp the vibrating end workpiece 5 and the mobile end workpiece 2 on the vibrating fixture and the mobile fixture of the linear friction welding machine respectively;

[0032]Step 2. The linear friction welding machine drives the workpiece 5 at the vibrating end to vibrate up and down with high frequency and small amplitude through the vibrating end hydraulic system and the vibrating fixture. The vibration frequency is 20-60 Hz and the amplitude is 1 to 3 mm; the mobile end hydraulic system passes through the sliding table and The mobile fixture drives the mobile end workpiece 2 to gradually approach and press on the reciprocating vibration end workpiece...

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Abstract

The invention discloses an ultrasonic vibration auxiliary friction welding method, which is used for solving the technical problem of poor strength of a welding joint of the existing auxiliary friction welding method. The technical scheme is that in the process of rotating or linear friction welding, in addition to applying positive pressure and friction shearing force on the friction interface togenerate friction heat and plastic deformation, ultrasonic vibration is applied on the workpiece at the moving end, and the ultrasonic vibration transmitted to the friction interface can reduce the deformation resistance of high-temperature metal on the friction interface and promote the plastic deformation thereof, so that a larger plastic deformation amount can be generated even under a smallerfriction pressure, and finally the effective connection of workpieces at two sides is realized, and the strength of the friction welding joint is improved.

Description

Technical field[0001]The invention relates to an auxiliary friction welding method, in particular to an ultrasonic vibration auxiliary friction welding method.Background technique[0002]Ultrasound is a sound wave with a frequency higher than 20kHz, which has the characteristics of high power, strong directionality and strong penetration. It has the functions of breaking the oxide film, breaking the continuous brittle phase, promoting metal flow, improving the plasticity of the material, and refining the weld grain, and has a wide range of applications in the welding field.[0003]Document 1 "Application Publication Number is CN106238901A Chinese Invention Patent" discloses an ultrasonic assisted friction stir welding welding tool and welding method. The method fixes the ultrasonic processing tool at the non-rotating part of the main machine head. During the welding process, the end surface of the ultrasonic processing tool contacts the surface of the welded material. It can effectively...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
CPCB23K20/122
Inventor 杜随更王松林李文采李志远
Owner NORTHWESTERN POLYTECHNICAL UNIV
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