CN113720911A - Positioning tool for detecting weld defects of air inlet casing and judging method - Google Patents
Positioning tool for detecting weld defects of air inlet casing and judging method Download PDFInfo
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- CN113720911A CN113720911A CN202111018924.0A CN202111018924A CN113720911A CN 113720911 A CN113720911 A CN 113720911A CN 202111018924 A CN202111018924 A CN 202111018924A CN 113720911 A CN113720911 A CN 113720911A
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- 230000007547 defect Effects 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003466 welding Methods 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000004313 glare Effects 0.000 claims description 3
- 230000002285 radioactive effect Effects 0.000 claims description 3
- 230000008719 thickening Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 8
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
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Abstract
The invention relates to a positioning tool for detecting a weld defect of an air inlet casing and a judging method, wherein the positioning tool comprises a fan-shaped supporting plate and a supporting plate sheet, wherein one side of the fan-shaped supporting plate is arc-shaped and is tightly attached to the inner arc of an inner ring of the air inlet casing; the supporting plate sheet is fixed on the fan-shaped supporting plate through a pin, and the lower bottom edge of the supporting bottom sheet is a straight edge and is overlapped with the symmetrical center of the arc-shaped edge; the side of the lower bottom of the supporting plate is provided with two U-shaped grooves in parallel, the central line of one U-shaped groove close to the fan-shaped supporting plate is superposed with the inner ring weld joint, the other U-shaped groove is far away from the fan-shaped supporting plate and is 10-30mm away from the other U-shaped groove, a cross laser is arranged in the U-shaped grooves, and cross light spot horizontal lines of the cross lasers in the two U-shaped grooves are superposed; and a power supply, a switch and a power amplifier are fixed on the supporting plate, and the cross laser and the power amplifier are electrically connected with the power supply and the switch through leads. The invention realizes accurate positioning of the defects on the premise of ensuring reliable detection results and not reducing the detection efficiency.
Description
Technical Field
The invention belongs to the technical field of weld defect detection, and particularly relates to a positioning tool and a judgment method for detecting weld defects of an air inlet casing.
Background
The air inlet casing is an important part at the front end of an engine, the air inlet casing is in an inner-outer ring layout and is formed by welding an inner ring, an outer ring and more than ten support plates, the inner ring and the outer ring are radially and uniformly connected by the more than ten support plates, the support plates are connected with the protruding blade-shaped parts on the inner ring in a welding mode, and the support plates are of cavity structures, and the inner cavities of the support plates are of two sizes (the support plate with the large inner cavity is a wide support plate, and the support plate with the small inner cavity is a narrow support plate), so that the gap between the two support plates is unequal and is about 45-65 mm. The cross section of the support plate is in a sharp isosceles triangle shape, two sides of the triangle are in a slightly convex arc shape, the bottom edges are very short (the bottom edges of the narrow support plate are about 8mm, and the bottom edges of the wide support plate are about 13mm), and the detected welding lines respectively occupy two sides of the triangle. At present, the weld defect detection generally adopts film ray detection, but is limited by the narrow inner cavity of the support plate and the reason that the weld distance on two sides of the support plate is small, and the defect that the air hole and the incomplete penetration in the weld are generated on the weld on which side of the specific support plate is not easy to judge.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a positioning tool for detecting the weld defects of an air inlet casing and a judging method.
A positioning tool for detecting weld defects of an air inlet casing comprises a fan-shaped supporting plate and a supporting plate piece, wherein one side of the fan-shaped supporting plate is arc-shaped, and the arc-shaped end of the fan-shaped supporting plate is tightly attached to the inner arc of an inner ring of the air inlet casing; the supporting plate sheet is fixed on the fan-shaped supporting plate through a pin, and the lower bottom edge of the supporting bottom sheet is a straight edge and is overlapped with the symmetrical center of the arc-shaped edge; the edge side of the lower bottom of the supporting plate is provided with two U-shaped grooves in parallel, the central line of one U-shaped groove close to the fan-shaped supporting plate is superposed with the inner ring weld joint, the other U-shaped groove is far away from the fan-shaped supporting plate and is 10-30mm away from the other U-shaped groove, a cross laser is arranged in the U-shaped groove, and cross light spot horizontal lines of the cross lasers in the two U-shaped grooves are superposed; and a power supply, a switch and a power amplifier are fixed on the supporting plate, and the cross laser and the power amplifier are electrically connected with the power supply and the switch through leads.
The fan-shaped supporting plate is of a multilayer sheet structure and is assembled by adopting multilayer pins according to the requirements of actual parts, so that the fan-shaped supporting plate is convenient to match with the inner circle of the inner ring of the air inlet casing.
In order to achieve the purpose of thickening without increasing weight, a plurality of gaskets are arranged among the multiple layers of sheets of the fan-shaped supporting plate.
And a wire protective cover is arranged outside a wire for connecting the cross laser with the power supply and the switch.
The method for judging the weld defects by using the positioning tool for detecting the weld defects of the air inlet casing comprises the following steps:
the method comprises the following steps: moving the position of the positioning tool to enable the arc-shaped side of the fan-shaped supporting plate to be tightly attached to the inner circular arc of the inner ring of the air inlet casing;
step two: sliding the positioning tool along the inner circumference of the inner ring of the air inlet casing to enable the straight side of the supporting plate with the cross laser to be aligned with one side of a supporting plate to be detected of the air inlet casing;
step three: turning on a power supply and a switch, and enabling the two cross lasers to emit cross light spots, wherein horizontal lines of the two cross light spots are overlapped, and the two vertical light spots are parallel;
step four: moving the machine head of the ray machine to enable the pipe head at the end part of the machine head of the ray machine to reach a position right above the interval of two adjacent support plates of the air inlet casing, wherein the two support plates are one support plate to be detected in the second step and one support plate which is adjacent to the support plate and far away from the positioning tool; then adjusting the tube head of the ray machine to enable the symmetrical central plane of the tube head of the ray machine to be positioned in the middle of two vertical light spots of the cross laser;
step five: reversely adjusting the power amplifier according to the brightness degree of the vertical laser spot of the cross laser on the tube head of the ray machine, so that the vertical laser spot on the tube head is soft and does not make a glare;
step six: the tube head of the ray machine is lowered to reach a transillumination position, namely the position where the ray bundle emitted by the tube head can cover the welding line, then the positioning tool is disassembled, the film is tightly attached to one side of the support plate to be detected, which is far away from the tube head of the ray machine, namely the film and the radioactive source of the ray machine are positioned on two sides of the support plate to be detected, the welding line is covered, and transillumination is started;
step seven: carrying out darkroom processing on the transilluminated film;
step eight: and observing from the film image, wherein two welding lines of the support plate of the air inlet casing are distributed in a V shape, if the defect image is close to the inner ring, the defect is indicated to be on the side of the support plate, which is pasted with the film, and if the defect is far away from the inner ring, the defect is indicated to be on the side of the support plate, on which the ray source is placed.
The invention has the beneficial effects that: the invention provides a positioning tool and a judgment method for detecting a weld defect of an air inlet casing, which can realize accurate positioning of the defect, reduce repair welding times and reduce the internal stress and deformation of parts on the premise of ensuring the reliability of a detection result and not reducing the detection efficiency. The method is simple, convenient to operate and accurate in positioning, and does not influence the detection of the defects.
Drawings
FIG. 1 is a schematic view of a positioning tool for detecting weld defects of an inlet casing according to the present invention;
FIG. 2 is a schematic view of a working state of the positioning tool for determining weld defects (wherein, a diagram (a) is a schematic view of the positioning tool and a support plate of an air inlet casing, a diagram (b) is a schematic view of a machine head of an X-ray machine, and a diagram (c) is a schematic view after a film is pasted);
wherein,
1-pin, 2-fan-shaped supporting plate, 3-supporting plate, 4-cross laser, 5-power amplifier, 6-power supply and switch, 7-lead, 8-lead protective cover, 9-U-shaped groove, 10-straight edge, 11-supporting plate, 12-ray machine head and 13-film.
Detailed Description
For better understanding of the present invention, the technical solutions and effects of the present invention will be described in detail by the following embodiments with reference to the accompanying drawings.
As shown in fig. 1, the positioning tool for detecting the weld defects of the air inlet casing comprises a fan-shaped supporting plate 2 and a supporting plate 3, wherein one side of the fan-shaped supporting plate 2 is arc-shaped, the arc-shaped end of the fan-shaped supporting plate 2 is tightly attached to the inner arc of the inner ring of the air inlet casing, the fan-shaped supporting plate 2 is of a multilayer sheet structure, and the fan-shaped supporting plate is assembled by adopting multilayer pins 1 according to the requirements of actual parts so as to be conveniently matched with the inner circle of the inner ring of the air inlet casing. In order to achieve the purpose of thickening without increasing weight, a plurality of gaskets are arranged among the multiple layers of sheets of the fan-shaped supporting plate 2. The supporting plate 3 is fixed on the fan-shaped supporting plate 2 through a pin 1, and the lower bottom edge of the supporting bottom plate is a straight edge 10 which is overlapped with the symmetrical center of the arc-shaped edge. Two U-shaped grooves 9 are formed in the side of the lower bottom of the supporting plate 3 in parallel, so that the cross laser 4 can be conveniently placed and fixed; the central line of one U-shaped groove 9 close to the fan-shaped support plate 2 is superposed with the inner ring weld, the other U-shaped groove 9 is far away from the fan-shaped support plate 2 and is separated from the other U-shaped groove by 910-30 mm, and the other U-shaped groove 9 is far away from the fan-shaped support plate 2 and is separated from the other U-shaped groove by 920 mm in the embodiment. The cross laser 4 is arranged in the U-shaped groove 9, the cross light spots of the cross laser 4 in the two U-shaped grooves 9 are overlapped horizontally, the machine head of the ray machine is moved, two vertical laser light spots are made to hit the machine head of the ray machine, and the area indicated by the two vertical light spots is the position of the machine head of the ray machine, where the defect position of a welding seam can be distinguished. The supporting plate 3 is fixed with a power supply and switch 6 and a power amplifier 5, and the supporting plate 3 plays a role in bearing the power supply and switch 6 and the power amplifier 5. The cross laser 4 and the power amplifier 5 are electrically connected with a power supply and a switch 6 through a lead 7. And a lead protective cover 8 is arranged outside a lead 7 connected with the power supply and switch 6 of the cross laser 4.
The spot brightness of the cross laser 4 is adjusted by the power amplifier 5, so that the spot is suitable for human eyes to observe.
The method for judging the weld defects of the air inlet casing by adopting the positioning tool for detecting the weld defects of the air inlet casing specifically comprises the following steps:
the method comprises the following steps: moving the position of the positioning tool to enable the arc-shaped side of the fan-shaped supporting plate 2 to be tightly attached to the inner circular arc of the inner ring of the air inlet casing;
step two: sliding the positioning tool along the inner circumference of the inner ring of the air inlet casing to align the straight edge 10 side of the support plate 3 with the cross laser 4 with one side of a support plate to be detected of the air inlet casing, as shown in fig. 2 (a);
step three: the power supply and the switch 6 are turned on, the two cross lasers 4 emit cross light spots, the horizontal lines of the two cross light spots are overlapped, and the two vertical light spots are parallel;
step four: moving the machine head of the ray machine to enable the pipe head at the end part of the machine head of the ray machine to reach a position right above the interval of two adjacent support plates of the air inlet casing, wherein the two support plates are one support plate to be detected in the second step and one support plate which is adjacent to the support plate and far away from the positioning tool; then, adjusting the tube head of the ray machine to enable the symmetrical center plane of the tube head of the ray machine to be positioned in the middle of two vertical light spots of the cross laser 4;
step five: reversely adjusting the power amplifier 5 according to the brightness degree of the vertical laser spot of the cross laser 4 on the tube head of the ray machine, so that the vertical laser spot on the tube head is soft and does not make a glare;
step six: lowering the tube head of the ray machine to reach a transillumination position, namely a position where the ray bundle emitted by the tube head can cover a welding line, as shown in fig. 2(b), then detaching the positioning tool, tightly attaching the film to one side of the support plate to be detected, which is far away from the tube head of the ray machine, namely the film and the radioactive source of the ray machine are positioned at two sides of the support plate to be detected, covering the welding line, as shown in fig. 2(c), and starting transillumination;
step seven: carrying out darkroom processing on the transilluminated film;
step eight: and observing from the film image, wherein two welding lines of the support plate of the air inlet casing are distributed in a V shape, if the defect image is close to the inner ring, the defect is indicated to be on the side of the support plate, which is pasted with the film, and if the defect is far away from the inner ring, the defect is indicated to be on the side of the support plate, on which the ray source is placed.
Claims (5)
1. The utility model provides an air inlet machine casket welding seam defect detecting is with location frock which characterized in that: the air inlet casing structure comprises a fan-shaped supporting plate and a supporting plate sheet, wherein one side of the fan-shaped supporting plate is arc-shaped, and the arc-shaped end of the fan-shaped supporting plate is tightly attached to the inner arc of the inner ring of the air inlet casing; the supporting plate sheet is fixed on the fan-shaped supporting plate through a pin, and the lower bottom edge of the supporting bottom sheet is a straight edge and is overlapped with the symmetrical center of the arc-shaped edge; the edge side of the lower bottom of the supporting plate is provided with two U-shaped grooves in parallel, the central line of one U-shaped groove close to the fan-shaped supporting plate is superposed with the inner ring weld joint, the other U-shaped groove is far away from the fan-shaped supporting plate and is 10-30mm away from the other U-shaped groove, a cross laser is arranged in the U-shaped groove, and cross light spot horizontal lines of the cross lasers in the two U-shaped grooves are superposed; and a power supply, a switch and a power amplifier are fixed on the supporting plate, and the cross laser and the power amplifier are electrically connected with the power supply and the switch through leads.
2. The positioning tool for detecting the weld defects of the air inlet casing according to claim 1, characterized in that: the fan-shaped supporting plate is of a multilayer sheet structure and is assembled by adopting multilayer pins according to the requirements of actual parts, so that the fan-shaped supporting plate is convenient to match with the inner circle of the inner ring of the air inlet casing.
3. The positioning tool for detecting the weld defects of the air inlet casing according to claim 2, characterized in that: in order to achieve the purpose of thickening without increasing weight, a plurality of gaskets are arranged among the multiple layers of sheets of the fan-shaped supporting plate.
4. The positioning tool for detecting the weld defects of the air inlet casing according to claim 1, characterized in that: and a wire protective cover is arranged outside a wire for connecting the cross laser with the power supply and the switch.
5. The method for determining the weld defect of the positioning tool for detecting the weld defect of the air inlet casing according to any one of claims 1 to 4, is characterized by comprising the following steps of:
the method comprises the following steps: moving the position of the positioning tool to enable the arc-shaped side of the fan-shaped supporting plate to be tightly attached to the inner circular arc of the inner ring of the air inlet casing;
step two: sliding the positioning tool along the inner circumference of the inner ring of the air inlet casing to enable the straight side of the supporting plate with the cross laser to be aligned with one side of a supporting plate to be detected of the air inlet casing;
step three: turning on a power supply and a switch, and enabling the two cross lasers to emit cross light spots, wherein horizontal lines of the two cross light spots are overlapped, and the two vertical light spots are parallel;
step four: moving the machine head of the ray machine to enable the pipe head at the end part of the machine head of the ray machine to reach a position right above the interval of two adjacent support plates of the air inlet casing, wherein the two support plates are one support plate to be detected in the second step and one support plate which is adjacent to the support plate and far away from the positioning tool; then adjusting the tube head of the ray machine to enable the symmetrical central plane of the tube head of the ray machine to be positioned in the middle of two vertical light spots of the cross laser;
step five: reversely adjusting the power amplifier according to the brightness degree of the vertical laser spot of the cross laser on the tube head of the ray machine, so that the vertical laser spot on the tube head is soft and does not make a glare;
step six: the tube head of the ray machine is lowered to reach a transillumination position, namely the position where the ray bundle emitted by the tube head can cover the welding line, then the positioning tool is disassembled, the film is tightly attached to one side of the support plate to be detected, which is far away from the tube head of the ray machine, namely the film and the radioactive source of the ray machine are positioned on two sides of the support plate to be detected, the welding line is covered, and transillumination is started;
step seven: carrying out darkroom processing on the transilluminated film;
step eight: and observing from the film image, wherein two welding lines of the support plate of the air inlet casing are distributed in a V shape, if the defect image is close to the inner ring, the defect is indicated to be on the side of the support plate, which is pasted with the film, and if the defect is far away from the inner ring, the defect is indicated to be on the side of the support plate, on which the ray source is placed.
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| CN202111018924.0A CN113720911B (en) | 2021-09-01 | 2021-09-01 | Positioning tool and judging method for detecting weld defects of air inlet casing |
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| CN113720911B CN113720911B (en) | 2024-02-06 |
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| CN113720911B (en) | 2024-02-06 |
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