Method and device for quality control of blade linear friction welding joints

A technology of linear friction welding and control device, applied in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve the problems of welding defects, waste of precious metals, non-welding, etc., to achieve uniform heat generation and reduce waste.

Active Publication Date: 2021-03-05
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to avoid defects affecting the quality of welded joints, it is necessary to leave a large margin to ensure the removal of unwelded defects, resulting in waste of precious metals
[0003] In addition, in linear friction welding, a rectangular or leaf-shaped cross-section that can accommodate the size of the blade is usually used. When a rectangular cross-section is used for welding, the above-mentioned unwelded defects are prone to occur at the corners of the rectangle.
When the leaf-shaped section is selected, it is not specified how to optimize the profile to ensure that the welding area is reduced and the quality of the welded joint is ensured. Waste of metal, increase the friction pressure of the welding process; or the welding section is too small, resulting in insufficient local heat generation of the welding section, resulting in welding defects, affecting the quality of the joint

Method used

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  • Method and device for quality control of blade linear friction welding joints
  • Method and device for quality control of blade linear friction welding joints

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Experimental program
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Effect test

Embodiment 1

[0029] Such as figure 1 As shown, this embodiment proposes a method for quality control of blade linear friction welding joints, the method comprising:

[0030] S101. Intercepting the section of the blade at the height of the welding position, and offsetting the two sides of the position where the thickness of the section of the blade is the largest.

[0031] Specifically, in this embodiment, a certain welding allowance can be reserved by offsetting the two sides of the position where the thickness of the blade section is the largest. If you choose a position with a smaller thickness, it is easy to have no margin in other positions, resulting in poor welding. However, if the margin is too large, it will affect the frictional pressure of the welding process and also cause welding defects. Therefore, in this embodiment, the margin is set between 2 mm and 5 mm, that is, the distance between the two sides after the shift and the original position is 2 mm to 5 mm.

[0032] S102....

Embodiment 2

[0039] This embodiment proposes a quality control device for linear friction welding joints of blades, the device includes a processor, and the processor is embedded with operational instructions executable by the processor, and has performed the following operations:

[0040] Obtain the blade section at the height of the welding position;

[0041] offsetting the two sides of the position where the section thickness of the blade is the largest;

[0042] Draw a circle with the maximum distance between the two sides after the offset as the diameter, and the center of the circle is the midpoint of the maximum distance line segment between the two sides after the offset;

[0043] moving the center of the circle along the centerline of the blade section to form a contour track;

[0044] Connect the farthest points of all the circles in the contour trajectory located on both sides of the blade section, and the area enclosed by the two line segments after the connection and the circ...

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Abstract

The invention proposes a quality control method for linear friction welding joints of blades. The method includes: intercepting the blade section at the height of the welding position; offsetting the two sides of the position with the largest thickness of the blade section; The maximum distance is the diameter to draw a circle, and the center of the circle is the midpoint of the maximum distance line segment between the two sides after the offset; the center of the circle is moved along the centerline of the blade section to form a contour track; All circles are connected at the farthest points on both sides of the blade section, and the area enclosed by the two line segments after the connection and the circles at both ends of the blade section is the welded section area. The invention also provides a quality control device for blade linear friction welding joints. The invention overcomes the problem that the traditional rectangular and rhombus cross-sections tend to produce unwelded defects at the corners. Effectively reduce the welding area of ​​components and ensure the quality of welded joints, and greatly reduce the waste of precious metals.

Description

technical field [0001] The present application relates to the field of welding, in particular to a method and device for quality control of blade linear friction welding joints. Background technique [0002] Linear friction welding technology is a solid phase welding technology, which has unique advantages in titanium alloy welding, and has excellent joint performance. The use of linear friction welding technology to manufacture the blisk has many other advantages, such as the self-cleaning effect in the welding process, the joint is forged structure, the welding process is stable and reliable, and the quality of the welded joint can be well guaranteed. At the same time, it can realize the connection of dissimilar materials or heterogeneous organizations, hollow blades and discs, and automatic control of the welding process. It has been used in the manufacture of titanium alloy blisks for multiple types of engines. When using linear friction welding technology to weld blade...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
CPCB23K20/123
Inventor 季亚娟张田仓李辉金俊龙
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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