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Friction-stir welding spindle constant displacement control method and device

A technology of friction stir and displacement control, which is applied in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve the problems such as the difficulty in guaranteeing the quality of joints, avoid weak bonding defects, reduce the workload of post-weld processing, and achieve consistent quality high effect

Active Publication Date: 2017-12-15
CAPITAL AEROSPACE MACHINERY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a constant displacement control method and device for the friction stir welding spindle to solve the problem in the prior art that the quality of the joint is difficult to guarantee due to the deformation of the welding spindle support mechanism and / or the workpiece support mechanism

Method used

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  • Friction-stir welding spindle constant displacement control method and device
  • Friction-stir welding spindle constant displacement control method and device
  • Friction-stir welding spindle constant displacement control method and device

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Embodiment 1

[0121] This embodiment provides a vertical longitudinal seam friction stir welding equipment, such as Figure 4 As shown, the main body of the welding main frame mechanism 3 has strong rigidity and no deformation occurs during welding, while the rigidity of the welding back support plate 4 is weak, and outward deflection occurs under the axial upsetting force of the welding main shaft 2 The deformation will cause the distance between the end of the stirring head and the support mechanism 4 of the welding back to change during the welding process. When the welding spindle 2 is close to the upper and lower ends, the amount of deflection is small, and when it is close to the middle of the support mechanism, the deflection The largest amount of curvature;

[0122] a. In the no-load state, the running frame mechanism 3 of the main engine, the welding back support mechanism 4 and the follow-up measuring device 5 are parallel to each other, and the follow-up measuring device 5 and th...

Embodiment 2

[0126] This embodiment provides a horizontal longitudinal seam friction stir welding equipment, such as Figure 5 As shown, the welding main machine running frame mechanism 3 has weak rigidity and is prone to deformation during welding, while the back supporting mechanism 4 has strong rigidity and does not deform during welding.

[0127] a. Place the follow-up measuring device 5 on one side of the main engine running frame mechanism 3, the main engine running frame mechanism 3, the welding back support mechanism 4 and the follow-up measuring device 5 are parallel under no-load state, but follow-up under loading state The dynamic measuring device 5 is also parallel to the welding back supporting mechanism 4;

[0128] b. When welding starts, that is, in the loading state, the follow-up measuring device 5 and the welding main shaft 2 move synchronously, in the same direction, and at a constant speed in the vertical direction; Measure the deformation δ1, and feed back the signal ...

Embodiment 3

[0131] This embodiment provides a kind of friction stir welding equipment, such as Figure 6 As shown, the rigidity of the main engine running frame mechanism 3 and the welding back support mechanism 4 are relatively weak, and deformation will occur during the welding process.

[0132] a. Set the first follow-up measuring device 5a outside the main machine running frame mechanism 3, and set the second follow-up measuring device 5b outside the welding back supporting mechanism 4. The main machine running frame mechanism 3, the welding back support mechanism 4, the first follow-up measuring device 5a and the second follow-up measuring device 5b are in a parallel state under no-load state, and the first follow-up measuring device 5a and the second follow-up measuring device 5b are in a loaded state. The second follow-up measuring device 5b is in a parallel state;

[0133] b. When welding starts, that is, under the loading state, the first follow-up measuring device 5a, the secon...

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Abstract

The invention provides a friction-stir welding spindle constant displacement control method and device and belongs to the technical field of welding. The control method comprises the steps of (1) controlling the constant displacement of a welding spindle so as to conduct friction-stir welding when receiving a welding control instruction; (2) acquiring the deformation displacement of the position, opposite to the welding spindle, of a welding spindle supporting mechanism and / or a workpiece supporting mechanism; (3) determining the axial follow-up interpolation displacement of the welding spindle according to the deformation displacement; and (4) controlling the axial interpolation displacement of the welding spindle according to the axial follow-up interpolation displacement. According to the method, the problem that the actual distance from the tail end of a stirring head to the workpiece supporting mechanism cannot be kept consistent due to deformation of the welding spindle supporting mechanism and / or the workpiece supporting mechanism is effectively avoided by acquiring the deformation displacement of the welding spindle supporting mechanism and / or the workpiece supporting mechanism and controlling the axial interpolation displacement of the welding spindle according to the deformation displacement; and the welding quality of roots of joints is guaranteed.

Description

technical field [0001] The invention relates to a constant displacement control method, device and system of a friction stir welding spindle for ensuring welding quality, and belongs to the field of welding technology. Background technique [0002] Friction stir welding technology is a new solid-phase joining technology invented by the British Welding Institute in 1991. Its basic principle is as follows: figure 1 shown. When the friction stir welding instruction is received, the controller controls the stirring head 1 figure 1 The direction of rotation shown is high-speed rotation into the workpiece and then along the welding direction ( figure 1 The straight line arrow direction) constant displacement, frictional heat is generated at the contact part between the stirring head 1 and the workpiece, so that the nearby metal forms a plastic softening layer, and the softening layer fills the cavity formed behind the stirring head under the action of the stirring head 1 rotatio...

Claims

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Application Information

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IPC IPC(8): B23K20/12
CPCB23K20/123
Inventor 王国庆杜岩峰郝云飞周庆刘政李迎张玉芝许春芳
Owner CAPITAL AEROSPACE MACHINERY
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