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Friction stir welding (FSW) machine and control method thereof

A friction stir welding machine technology, applied in the control field of friction stir welding machine and friction stir welding machine, can solve problems such as poor control accuracy, and achieve the effect of solving precise control and fast dynamic response speed

Active Publication Date: 2017-02-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of poor control accuracy of existing friction stir welding machines, the present invention provides a friction stir welding machine and its control method

Method used

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  • Friction stir welding (FSW) machine and control method thereof
  • Friction stir welding (FSW) machine and control method thereof
  • Friction stir welding (FSW) machine and control method thereof

Examples

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Effect test

Embodiment 1

[0033] Embodiment 1: refer to Figure 1-4 , the friction stir welding machine and its displacement and pressure control method of the present invention comprise a stirring head 10, a spindle box 7, a beam 20, a column 21, and a base 28, and the stirring head 10 is installed on the bottom of the stirring shaft 15, and the stirring shaft 15 is two A linear rotary bushing 17 and a thrust bearing 16 are provided at the end; a rotating mover iron core 8 is fixed outside the stirring shaft 15, and a rotating mover winding 9 is arranged at both ends of the rotating mover iron core 8; The sub iron core 8 is correspondingly provided with a rotating stator iron core 2, and the two ends of the rotating stator iron core 2 are provided with a rotating stator winding 1; the stirring shaft 15 is also fixedly provided with a linear mover iron core 12 (secondary iron core), The linear mover iron core 12 is provided with an outer notch, and is embedded with a copper linear mover guide bar 11 (s...

Embodiment 2

[0046] Embodiment 2: refer to Figure 5 , On the basis of Embodiment 1, the internal structure and control method of the headstock 7 are different, and the rest of the structure and control method are the same. The stirring shaft 15 in the embodiment 1 is divided into a first stirring shaft 43 and a second stirring shaft 44, the first stirring shaft 43 only performs a rotating motion and does not perform an axial linear motion, and the second stirring shaft 44 not only performs a rotating motion but also performs a rotating motion. Axial linear motion. The friction stir welding machine and its displacement and pressure control method of the present invention include a stirring head 10, a spindle box 7, a beam 20, a column 21, and a base 28, and the stirring head 10 is installed on the bottom of the second stirring shaft 44, and the second stirring shaft The upper and lower ends of 44 are provided with linear rotary bushings 17 and thrust bearings 16; the second stirring shaft...

Embodiment 3

[0058] Embodiment 3: refer to Figure 6-9 , the friction stir welding machine and its displacement and pressure control method of the present invention comprise a stirring head 10, a spindle box 7, a beam 20, a column 21, and a base 28, and the stirring head 10 is installed on the bottom of the stirring shaft 15, and the stirring shaft 15 is two A linear rotary bushing 17 and a thrust bearing 16 are provided at the end; a rotating mover iron core 8 is fixed outside the stirring shaft 15, and a rotating mover winding 9 is arranged at both ends of the rotating mover iron core 8; The sub-iron core 8 is correspondingly provided with a rotating stator iron core 2, and the two ends of the rotating stator iron core 2 are provided with a rotating stator winding 1; an air gap 19 is left between the rotating stator iron core 8 and the rotating stator iron core 2; The rotating stator core 2 is provided with a cooling pipe 4, and the two ends of the cooling pipe 4 are connected with a coo...

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Abstract

The invention discloses a friction stir welding (FSW) machine and a control method thereof and is used for solving the technical problem of poor control precision of existing FSW machines. According to the technical scheme, the rotary and linear driving force is directly applied to a stir shaft, and a stir head is driven to move. A rotary rotor and a linear rotor are fixed on the stir shaft, a rotary stator drives the rotary rotor to drive the stir shaft to rotate after being electrified, and a linear stator drives the linear rotor to drive the stir shaft to reciprocate up and down after being electrified. The displacement and the pressure of the stir shaft are directly controlled by the linear stator and the linear rotor, and the mass and the inertia of the stir shaft are much smaller than those of a spindle box, so that a control system has the high dynamic response speed. The height of the spindle box is roughly adjusted through a ball screw firstly in the Z-axis displacement direction, the height of the stir shaft is fine adjusted through the linear stator and the linear rotor in the Z'-axis displacement direction, and problems about precise control on the displacement and the pressure of the stir head are solved.

Description

technical field [0001] The invention relates to a friction welding machine, in particular to a friction stir welding machine, and also to a control method of the friction stirring welding machine. Background technique [0002] Friction Stir Welding (Friction Stir Welding, FSW) is a solid phase connection technology invented by the British Welding Institute in 1991 based on the principle of friction welding technology. The high-speed rotating stirring head presses into the workpiece to be welded. The shaft shoulder of the stirring head and the stirring pin rub against the surrounding metal materials to generate frictional heat. Proceeding along the welding direction, the thermoplastic metal is transferred from the front to the rear with the agitation of the stirring head, and the solid phase connection between the metals to be welded is realized under the forging action of the stirring head shoulder. In the prior art, there are two ways to drive the stirring head to insert i...

Claims

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Application Information

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IPC IPC(8): B23K20/12
CPCB23K20/125
Inventor 杜随更王松林张建飞
Owner NORTHWESTERN POLYTECHNICAL UNIV
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