CN109175673B - Quality control method and device for linear friction welding joint of blade - Google Patents
Quality control method and device for linear friction welding joint of blade Download PDFInfo
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- CN109175673B CN109175673B CN201811311708.3A CN201811311708A CN109175673B CN 109175673 B CN109175673 B CN 109175673B CN 201811311708 A CN201811311708 A CN 201811311708A CN 109175673 B CN109175673 B CN 109175673B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/123—Controlling or monitoring the welding process
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Abstract
The invention provides a quality control method for a linear friction welding joint of a blade, which comprises the following steps: cutting the section of the blade at the height of the welding position; offsetting two sides of the position with the largest blade section thickness; drawing a circle by taking the maximum distance between the two shifted sides as a diameter, wherein the center of the circle is the midpoint of a maximum distance line segment between the two shifted sides; moving the circle center along the center line of the blade section to form a contour track; and connecting the farthest points of all circles on the two sides of the blade section in the contour locus, wherein the area enclosed by the two line segments after the connection and the circles on the two ends of the blade section is a welded section area. The invention also provides a quality control device for the linear friction welding joint of the blade. The invention overcomes the defect that the traditional rectangular and rhombic sections are easy to generate non-welding at the corners. The welding area of the component is effectively reduced, the quality of a welding joint is guaranteed, and the waste of precious metal is reduced to a great extent.
Description
Technical Field
The application relates to the field of welding, in particular to a method and a device for controlling the quality of a linear friction welding joint of a blade.
Background
The linear friction welding technology is a solid phase welding technology, has unique advantages in the aspect of titanium alloy welding, and has excellent joint performance. The blisk manufactured by the linear friction welding technology has many other advantages, such as self-cleaning function in the welding process, forged joint structure in the welding process, stable and reliable welding process, and good welding joint quality guarantee. Meanwhile, the method can realize the connection of dissimilar materials or dissimilar tissues, the hollow blade and the wheel disc, the automatic control of the welding process and the like, and is already used for manufacturing titanium alloy blisks of engines of various models. When the linear friction welding technology is adopted for welding the blade and the wheel disc, the traditional welding section is rectangular or rhombic, and defects are easily generated at right angles or acute angles in the welding process. In order to avoid the defect from affecting the quality of the welding joint, a larger margin is required to be reserved so as to ensure the removal of the unwelded defect and cause the waste of precious metal.
In addition, when linear friction welding is performed, a rectangular or bladed cross section shape capable of accommodating the size of the blade is generally adopted, and when rectangular cross section welding is selected, the defect that the unwelded part is easily generated at the corner of the rectangle occurs. When the cross section of the following blade shape is selected, how to optimize the profile to ensure that the welding area is reduced and the quality of the welding joint is ensured is not described in detail, so that when the cross section is too large or the shape is not proper, the welding joint is not formed well, welding defects are generated, precious metal is wasted, and the friction pressure in the welding process is increased; or the welding section is too small, so that the local heat generation of the welding section is insufficient, the welding defect is generated, and the quality of the joint is influenced.
Disclosure of Invention
In order to solve one of the above technical problems, the present invention provides a method and a device for controlling the quality of a linear friction welding joint of a blade.
The first aspect of the embodiments of the present invention provides a method for controlling quality of a linear friction welding joint of a blade, where the method includes:
cutting the section of the blade at the height of the welding position;
offsetting two sides of the position with the largest blade section thickness;
drawing a circle by taking the maximum distance between the two shifted sides as a diameter, wherein the center of the circle is the midpoint of a maximum distance line segment between the two shifted sides;
moving the circle center along the center line of the blade section to form a contour track;
and connecting the farthest points of all circles in the contour locus on the two sides of the blade section, wherein the area defined by the two line segments after the connection and the circles on the two ends of the blade section is a welded section area.
Preferably, the offset amount for offsetting both sides of the position where the sectional thickness of the blade is the largest is 3 mm.
Preferably, the distance between the outermost side of the circle at the two ends of the blade section and the two ends of the blade section is 3mm respectively.
Preferably, one of the two ends of the section of the blade is an air inlet end, and the other end of the section of the blade is an air outlet end.
In a second aspect, the present invention provides a quality control apparatus for a blade linear friction welding joint, where the apparatus includes a processor, and operating instructions executable by the processor are embedded in the processor, and the following operations are performed:
acquiring the section of the blade at the height of the welding position;
offsetting two sides of the position with the largest blade section thickness;
drawing a circle by taking the maximum distance between the two shifted sides as a diameter, wherein the center of the circle is the midpoint of a maximum distance line segment between the two shifted sides;
moving the circle center along the center line of the blade section to form a contour track;
and connecting the farthest points of all circles in the contour locus on the two sides of the blade section, wherein the area defined by the two line segments after the connection and the circles on the two ends of the blade section is a welded section area.
Preferably, the offset amount for offsetting both sides of the position where the sectional thickness of the blade is the largest is 3 mm.
Preferably, the distance between the outermost side of the circle at the two ends of the blade section and the two ends of the blade section is 3mm respectively.
Preferably, one of the two ends of the section of the blade is an air inlet end, and the other end of the section of the blade is an air outlet end.
The invention has the following beneficial effects: the welding quality of the joint is ensured by keeping the welding section shape of the blade consistent with the blade profile and simultaneously reserving a certain welding allowance. Meanwhile, the welding area with uniform thickness is formed by drawing the contour curve, so that the whole heat generation of the welding area is more uniform, and the problem that the traditional rectangular and rhombic sections are easy to generate the defect of non-welding at the corner is solved. The welding area of the component can be effectively reduced, the quality of a welding joint is ensured, and the waste of precious metal is reduced to a great extent.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a flow chart of a method for controlling the quality of a blade linear friction weld joint according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an embodiment of a method for controlling the quality of a blade linear friction welded joint according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example 1
As shown in fig. 1, the present embodiment proposes a blade linear friction welding joint quality control method, which includes:
s101, cutting the section of the blade at the height of the welding position, and offsetting two sides of the position with the largest thickness of the section of the blade.
Specifically, the present embodiment may leave a certain welding margin by offsetting both sides of the position where the sectional thickness of the blade is the largest. If the position with smaller thickness is selected, the other positions are easy to have no allowance, and poor welding is caused. However, if the margin is too large, the friction pressure of the welding process may be affected, also causing welding defects. Therefore, the present embodiment sets the margin to be between 2mm and 5mm, that is, the distance between the shifted both sides from the original position to be 2mm to 5 mm.
S102, drawing a circle by taking the maximum distance between the two deviated sides as a diameter, and moving the circle center of the circle along the center line of the blade section to form a contour track.
Specifically, the center of the circle is the midpoint of the maximum distance line segment between the two shifted sides. The formation of the profile track is made in order to finally generate a welded section. The blade section can be completely surrounded in the contour track through the contour track formed by the movement of the circle on the blade section, the thickness of a finally formed welding area can be more uniform, and the force and heat parameters generated by the welding area with uniform thickness are relatively uniform, so that the welding is more facilitated.
S103, connecting the farthest points of all circles in the contour locus on two sides of the blade section.
Specifically, the cross-sectional area finally formed in this embodiment is defined by two line segments after connection and circles at two ends of the blade cross-section. Wherein, the two ends of the section of the blade are respectively an air inlet end and an air outlet end. Because both ends of the blade section also need to be welded in the welding process, welding allowances also need to be reserved at the positions of both ends of the blade section, and the selection of the welding allowances can be the same as or similar to the welding allowances at both sides of the blade section.
As shown in fig. 2, which is an example of the implementation process of the method of this embodiment, first, a blade section is cut, and then, two sides of the maximum thickness of the blade section are shifted outward by an offset amount of 3 mm. And drawing a circle in the middle of the two shifted sides, wherein the center of the circle is the midpoint of the maximum distance line segment between the two shifted sides, the center of the circle is also fixed on the central line of the section of the blade, and the diameter of the circle is the maximum distance between the two shifted sides. And finally, moving the center of the circle along the central line of the section of the blade to form a moving area of the circle, connecting the two sides of the moving area, and defining the area surrounded by the circles at the two ends as a welding area. The welding margin left by the circles at both ends may be set to 3 mm.
The welding quality of the joint is ensured by keeping the welding section shape of the blade consistent with the blade profile and simultaneously reserving certain welding allowance. Meanwhile, a welding area with uniform thickness is formed by drawing a contour curve, so that the whole heat generation of the welding area is more uniform, and the problem that the traditional rectangular and rhombic sections are easy to generate the defect of non-welding at corners is solved. The welding area of the component can be effectively reduced, the quality of a welding joint is ensured, and the waste of precious metal is reduced to a great extent.
Example 2
The embodiment provides a quality control device for a blade linear friction welding joint, which comprises a processor, wherein the processor is embedded with operating instructions executable by the processor, and the following operations are performed:
acquiring the section of the blade at the height of the welding position;
offsetting two sides of the position with the largest blade section thickness;
drawing a circle by taking the maximum distance between the two shifted sides as a diameter, wherein the center of the circle is the midpoint of a maximum distance line segment between the two shifted sides;
moving the circle center along the center line of the blade section to form a contour track;
and connecting the farthest points of all circles in the contour locus on the two sides of the blade section, wherein the area defined by the two line segments after the connection and the circles on the two ends of the blade section is a welded section area.
Specifically, the present embodiment may leave a certain welding margin by offsetting both sides of the position where the sectional thickness of the blade is the largest. If the position with smaller thickness is selected, the other positions are easy to have no allowance, and poor welding is caused. However, if the margin is too large, the friction pressure of the welding process may be affected, also causing welding defects. Therefore, the present embodiment sets the margin to be between 2mm and 5mm, that is, the distance between the shifted both sides from the original position to be 2mm to 5 mm.
In this embodiment, the center of the circle is the midpoint of the maximum distance line segment between the two shifted sides. The formation of the profile track is made in order to finally generate a welded section. The blade section can be completely surrounded in the contour track through the contour track formed by the movement of the circle on the blade section, the thickness of a finally formed welding area can be more uniform, and the force and heat parameters generated by the welding area with uniform thickness are relatively uniform, so that the welding is more facilitated.
The cross-sectional area finally formed in this embodiment is defined by two line segments after the connection and circles at both ends of the blade cross-section. Wherein, the two ends of the section of the blade are respectively an air inlet end and an air outlet end. Because both ends of the blade section also need to be welded in the welding process, welding allowances also need to be reserved at the positions of both ends of the blade section, and the selection of the welding allowances can be the same as or similar to the welding allowances at both sides of the blade section.
The embodiment keeps the welding section shape of the blade consistent with the blade profile, and meanwhile, a certain welding allowance is reserved to guarantee the welding quality of the joint. Meanwhile, the embodiment forms the welding area with uniform thickness by drawing the contour curve, so that the whole heat generation of the welding area is more uniform, and the problem that the traditional rectangular and rhombic sections are easy to generate the defect of non-welding at the corner is solved. The welding area of the component can be effectively reduced, the quality of a welding joint is ensured, and the waste of precious metal is reduced to a great extent.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (8)
1. A method of quality control of a blade linear friction weld joint, the method comprising:
cutting the section of the blade at the height of the welding position;
offsetting two sides of the position with the largest blade section thickness;
drawing a circle by taking the maximum distance between the two shifted sides as a diameter, wherein the center of the circle is the midpoint of a maximum distance line segment between the two shifted sides;
moving the center of the circle along the center line of the blade section to enable the circle to form a contour track;
and connecting the farthest points of all circles in the contour locus on the two sides of the blade section, wherein the area defined by the two line segments after the connection and the circles on the two ends of the blade section is a welded section area.
2. A method according to claim 1, characterized in that the offset is 3mm to both sides of the position where the blade cross-sectional thickness is greatest.
3. A method according to claim 1 or 2, characterised in that the outermost of the circles at the two ends of the blade section are each 3mm from the two ends of the blade section.
4. The method of claim 1, wherein one of the two ends of the blade cross section is an inlet end and the other end is an outlet end.
5. A blade linear friction weld joint quality control device, characterized in that the device comprises a processor, wherein the processor is embedded with operating instructions executable by the processor, and the following operations are executed:
acquiring the section of the blade at the height of the welding position;
offsetting two sides of the position with the largest blade section thickness;
drawing a circle by taking the maximum distance between the two shifted sides as a diameter, wherein the center of the circle is the midpoint of a maximum distance line segment between the two shifted sides;
moving the center of the circle along the center line of the blade section to enable the circle to form a contour track;
and connecting the farthest points of all circles in the contour locus on the two sides of the blade section, wherein the area defined by the two line segments after the connection and the circles on the two ends of the blade section is a welded section area.
6. The blade linear friction weld joint quality control device of claim 5, wherein the offset amount that offsets both sides of the position where the blade section thickness is largest is 3 mm.
7. The blade linear friction weld joint quality control device according to claim 5 or 6, wherein the distances between the outermost sides of the circles at both ends of the blade section and both ends of the blade section are respectively 3 mm.
8. The apparatus of claim 5, wherein one of the two ends of the blade cross section is an air inlet end and the other end is an air outlet end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811311708.3A CN109175673B (en) | 2018-11-06 | 2018-11-06 | Quality control method and device for linear friction welding joint of blade |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811311708.3A CN109175673B (en) | 2018-11-06 | 2018-11-06 | Quality control method and device for linear friction welding joint of blade |
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| CN109175673A CN109175673A (en) | 2019-01-11 |
| CN109175673B true CN109175673B (en) | 2021-03-05 |
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| CN201811311708.3A Active CN109175673B (en) | 2018-11-06 | 2018-11-06 | Quality control method and device for linear friction welding joint of blade |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113770654B (en) * | 2020-05-14 | 2023-06-02 | 中国兵器工业第五九研究所 | Welding method of multi-blade member |
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| DE102009030042A1 (en) * | 2009-06-23 | 2011-01-05 | Continental Automotive Gmbh | Turbine rotor for a turbocharger and method for producing a turbine rotor |
| GB0913655D0 (en) * | 2009-08-06 | 2009-09-16 | Rolls Royce Plc | A method of friction welding |
| FR2998499B1 (en) * | 2012-11-28 | 2014-11-21 | Snecma | METHOD FOR FRICTIONALLY WELDING A BLADE ON A ROTOR DISC OF A TURBOMACHINE |
| CN105303588B (en) * | 2015-09-18 | 2018-11-13 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of X-Y scheme silhouette rendering method |
| CN108372386B (en) * | 2016-12-21 | 2020-03-17 | 中国航空制造技术研究院 | Blisk linear friction welding repair method |
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