CN110763770A - Drum-shaped test block - Google Patents
Drum-shaped test block Download PDFInfo
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- CN110763770A CN110763770A CN201911078109.6A CN201911078109A CN110763770A CN 110763770 A CN110763770 A CN 110763770A CN 201911078109 A CN201911078109 A CN 201911078109A CN 110763770 A CN110763770 A CN 110763770A
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- test block
- drum
- arc
- shaped test
- point
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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
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/30—Arrangements for calibrating or comparing, e.g. with standard objects
Abstract
The invention discloses a drum-shaped test block, the longitudinal section of which comprises a first arc (1), a second arc (2), a first line segment (3) and a third arc (4) which are sequentially connected end to end, the radius of the first arc (1) is R, the radii of the second arc (2) and the third arc (4) are R, the centers of circles of the second arc (2) and the third arc (4) are O points, the O points are positioned on the first arc (1), the center of circle of the first arc (1) is a C point, the C point is positioned below the O point, and a rectangular reticle (5) is arranged at the O point of the drum-shaped test block. The drum-shaped test block has a simple structure, can calibrate the incidence point, the sound velocity and the zero point of a circumferential oblique detection convex curved surface forging, meets the aim of accurate calibration of an instrument by using the instrument and probe parameters calibrated by the convex comparison test block, and is more favorable for ultrasonic defect positioning and flaw detection of the convex curved surface forging.
Description
Technical Field
The invention belongs to the field of precision positioning of an incident point, an angle, a horizontal direction, a vertical direction and a sound path of a hollow forging piece for ultrasonic flaw detection by oblique incidence in the circumferential surface direction, and particularly relates to a drum-shaped test block.
Background
The main standard test blocks of the ultrasonic flaw detector and the probe are a V1(IIW1) ship-shaped test block and a V2(IIW2) ox horn test block, the functions of the test blocks are mainly horizontal linearity, vertical linearity, dynamic range, sensitivity allowance, resolution, blind area, incident point of the probe, refraction angle and the like, and the detection surface of the probe is a plane. The drum-shaped test block has basically the same function as the ship-shaped test block or the ox horn test block, but the detection surface of the probe is a curved surface. The shape of the workpiece surface is generally a plane and a curved surface, the plane is used for flaw detection work of the detection surface, and instruments and probes of the workpiece surface are calibrated into a ship-shaped test block and a ox horn test block; the curved surface is used for flaw detection of a detection surface, and instruments and probes of the curved surface are calibrated without detection test blocks in the world.
The ultrasonic circumferential oblique detection defects of the curved surface forging are accurately positioned, and no standard test block is debugged internationally. How to determine the incident point, angle, scanning speed and zero point of the curved surface forging detection becomes a major problem in the field of nondestructive detection. The detection method for detecting the circumferential inclined detection defects of the oil and gas drilling and production equipment mainly comprises the steps of connecting a line between first reflected peak values obtained on inner and outer diameter gaps and establishing an amplitude reference line. However, the precision positioning of the defects cannot be guaranteed, and the existing reference blocks cannot meet the requirements of angle, speed and zero calibration.
Therefore, a new reference block is needed to solve the above problems.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the defect that the reference test block in the prior art cannot meet the calibration of an incident point, a scanning speed and a zero point, the invention provides the drum-shaped test block which can calibrate the incident point, the angle, the sound velocity and the zero point of the circumferential oblique detection curved surface forging.
The technical scheme is as follows: in order to solve the technical problem, the drum-shaped test block adopts the following technical scheme:
the longitudinal section of the drum-shaped test block comprises a first circular arc, a second circular arc, a first line segment and a third circular arc which are sequentially connected end to end, the radius of the first circular arc is R, the radii of the second circular arc and the third circular arc are R, the circle centers of the second circular arc and the third circular arc are O points, the O points are located on the first circular arc, the circle center of the first circular arc is a C point, the C point is located below the O point, and rectangular scribed lines are arranged at the O points of the drum-shaped test block.
Preferably, R ═ R.
Preferably, the length of the second line segment is less than or equal to 2 r/5.
Preferably, a straight line passing through the points O and C is perpendicular to the first line segment.
Preferably, the distance between the two end faces of the drum-shaped test block is the thickness of the drum-shaped test block, and the thickness of the drum-shaped test block is greater than or equal to 25 mm.
Preferably, the error of the thickness of the drum-shaped test block is ± 0.1 mm.
Preferably, the longitudinal sections of the drum-shaped test block are the same in size and shape.
Preferably, the rectangular scribed line is arranged at one end or two ends of the fish-shaped test block.
Preferably, arc length scribed lines are arranged on two sides of the point O.
Preferably, the drum-shaped test block comprises a plurality of test blocks with the following specifications: r is 50mm, 100mm, 150mm, 200mm or 250 mm.
Has the advantages that: the drum-shaped test block has a simple structure, can calibrate the incidence point and the zero point of the circumferential oblique detection convex curved surface forging, meets the aim of accurate calibration of an instrument by using the instrument and probe parameters calibrated by the convex comparison test block, and is more favorable for ultrasonic defect positioning and flaw detection of the convex curved surface forging.
Drawings
FIG. 1 is a front view of a drum test block of the present invention;
FIG. 2 is a left side view of the drum test block of the present invention;
FIG. 3 is a schematic representation of the use of the drum test block of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, in the drum-shaped test block of the present invention, a longitudinal section of the drum-shaped test block includes a first arc 1, a second arc 2, a first line segment 3 and a third arc 4 connected end to end in sequence, a radius of the first arc 1 is R, radii of the second arc 2 and the third arc 4 are both R, centers of circles of the second arc 2 and the third arc 4 are both O points, the O points are located on the first arc 1, a center of the first arc 1 is C point, the C point is located below the O point, and a rectangular scribed line 5 is disposed at the O point of the drum-shaped test block.
Preferably, R ═ R.
Preferably, the length of the second line segment 4 is less than or equal to 2 r/5. Ensuring a maximum refraction angle of 60 degrees.
Preferably, a straight line passing through the points O and C is perpendicular to the first line segment 3.
Preferably, the distance between the two end faces of the drum-shaped test block is the thickness of the drum-shaped test block, and the thickness of the drum-shaped test block is more than or equal to 25 mm.
Preferably, the error in the thickness of the drum test block is ± 0.1 mm.
Preferably, the longitudinal sections of the drum-shaped test block are the same in size and shape.
Preferably, the rectangular score lines 5 are provided at one or both ends of the fish-shaped test block.
Preferably, arc length scribed lines are arranged on two sides of the point O.
Preferably, the drum test block comprises a plurality of test blocks of the following specifications: r is 50mm, 100mm, 150mm, 200mm or 250 mm. The corresponding chord length AB is 20mm, 40mm, 60mm, 80mm or 100 mm. Ensuring a minimum refraction angle of 12 degrees.
The drum-shaped test block has a simple structure, can calibrate the incidence point, the sound velocity and the zero point of a circumferential oblique detection convex curved surface forging, meets the aim of accurate calibration of an instrument by using the instrument and probe parameters calibrated by the convex comparison test block, and is more favorable for ultrasonic defect positioning and flaw detection of the convex curved surface forging.
Example 1
The incidence point, sound velocity and zero point calibration reference block of the convex curved surface forging is called a drum-shaped test block, the thickness of the drum-shaped test block is equal to 1' (25mm), the width of the drum-shaped test block is the cross span of two circles, and the height of the drum-shaped test block is r minus the chord arc height. And the positions near the point O are respectively made into 25mm scribed lines at the left and the right, lines are scribed at intervals of 1mm, the long scribed lines are 0, 5, 10, 15, 20 and 25, the short scribed lines are other lines, and the scribed lines are scribed towards the center of the circle R, as shown in figure 3.
1. The probe with the radius r of the convex surface moves left and right at the point O, the reflected wave of only one point is strongest, and the corresponding position point of the reticle and the front end face of the probe is measured, namely the front edge of the probe.
2. The probe with the radius r of the convex surface moves left and right at the point O, the first reflected wave is adjusted to the strongest position (the depth is r), the second reflected wave (the depth is 2r) appears in the compression depth, and the sound velocity and the zero point calibration can be carried out.
Comparison test block material: the technical indexes of the reference block need to meet the requirements of GB/T11259 and ASTM E428 standards.
The invention principle is as follows: in order to better ensure the precision positioning of the horizontal, vertical and sound path of the oblique incidence ultrasonic flaw detection of the convex curved surface forge piece or the hollow forge piece in the circumferential direction, a drum-shaped test block is designed, and the detection precision positioning of the oblique incidence of the convex curved surface forge piece is achieved by firstly calibrating the incidence point of a probe, simultaneously calculating the ultrasonic reflection sound path S1 which is r and the ultrasonic reflection sound path S2 which is 2r, and then calibrating the speed and the zero point of the probe.
The invention obviously improves the accurate positioning of the ultrasonic circumferential oblique incidence defect, greatly improves the level of the ultrasonic circumferential oblique incidence detection of the convex curved surface forging, and can be matched with various drum-shaped test blocks with 50mm difference of arc radius to realize the accurate positioning of the ultrasonic flaw detection of the longitudinal defect of the convex curved surface forging. The instrument and probe parameters calibrated by the convex reference block meet the aim of accurate calibration of the instrument, and are more favorable for ultrasonic defect positioning and flaw detection of the convex curved surface forging.
The defects are accurately positioned by utilizing the ultrasonic circumferential oblique detection, the defect positions of the convex curved surface forging can be effectively judged, the manufacturing process of judging whether the subsequent process is processed or not or judging waste is facilitated, and the potential and the advantage of the flaw detection method are fully exerted.
Claims (10)
1. A drum test block, characterized by: the longitudinal section of the drum-shaped test block comprises a first circular arc (1), a second circular arc (2), a first line segment (3) and a third circular arc (4) which are sequentially connected end to end, the radius of the first circular arc (1) is R, the radii of the second circular arc (2) and the third circular arc (4) are R, the circle centers of the second circular arc (2) and the third circular arc (4) are O points, the O points are located on the first circular arc (1), the circle center of the first circular arc (1) is a C point, the C point is located below the O points, and rectangular scribed lines (5) are arranged at the O points of the drum-shaped test block.
2. The drum test block of claim 1, wherein: r ═ R.
3. The drum test block of claim 2, wherein: the length of the second line segment (4) is less than or equal to 2 r/5.
4. The drum test block of claim 1, wherein: a straight line passing through the points O and C is perpendicular to the first line segment (3).
5. The drum test block of claim 1, wherein: the distance between the two end faces of the drum-shaped test block is the thickness of the drum-shaped test block, and the thickness of the drum-shaped test block is larger than or equal to 25 mm.
6. The drum test block of claim 5, wherein: the error of the thickness of the drum-shaped test block is +/-0.1 mm.
7. The drum test block of claim 1, wherein: the size and the shape of the longitudinal section of each part of the drum-shaped test block are the same.
8. The drum test block of claim 1, wherein: the rectangular scribed lines (5) are arranged at one end or two ends of the fish-shaped test block.
9. The drum test block of claim 1, wherein: arc length scribed lines are arranged on two sides of the point O.
10. The drum test block of claim 1, wherein: the drum-shaped test block comprises a plurality of test blocks with the following specifications: r is 50mm, 100mm, 150mm, 200mm or 250 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911078109.6A CN110763770A (en) | 2019-11-06 | 2019-11-06 | Drum-shaped test block |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911078109.6A CN110763770A (en) | 2019-11-06 | 2019-11-06 | Drum-shaped test block |
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| Publication Number | Publication Date |
|---|---|
| CN110763770A true CN110763770A (en) | 2020-02-07 |
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| CN201911078109.6A Pending CN110763770A (en) | 2019-11-06 | 2019-11-06 | Drum-shaped test block |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138231A (en) * | 2021-04-13 | 2021-07-20 | 武汉理工大学 | Ultrasonic phased array detection device and method for aero-engine case ring forging |
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| US3933026A (en) * | 1974-07-31 | 1976-01-20 | Ham William C | Ultrasonic calibration standard |
| US5665893A (en) * | 1996-06-06 | 1997-09-09 | General Electric Company | Reference block for determining operating characteristics of ultrasonic transducer in right circular cylinder type probe |
| EP1860398A2 (en) * | 2006-05-24 | 2007-11-28 | Rolls-Royce plc | Calibration block |
| CN101806779A (en) * | 2010-04-30 | 2010-08-18 | 符丰 | Method for calibrating small-diameter probe for ultrasonic flaw detector |
| US20130180312A1 (en) * | 2012-01-13 | 2013-07-18 | Airbus Operations Limited | Calibration block and method |
| CN104297351A (en) * | 2014-10-29 | 2015-01-21 | 中广核检测技术有限公司 | Test block and method for measuring refraction angle of ultrasonic angle probe |
| CN204359756U (en) * | 2014-12-17 | 2015-05-27 | 国家电网公司 | A kind of porcelain insulator tilting probe measures Special test block |
| US20160231292A1 (en) * | 2014-04-23 | 2016-08-11 | Nanjing Develop Advanced Manufacturing Co., Ltd. | Heel test block |
| CN206038622U (en) * | 2016-09-20 | 2017-03-22 | 盘锦晨宇无损检测有限公司 | Calibration block for ultrasonic testing of interior excircle longitudinal joint |
| CN209014521U (en) * | 2018-09-26 | 2019-06-21 | 南京迪威尔高端制造股份有限公司 | Spill test block |
-
2019
- 2019-11-06 CN CN201911078109.6A patent/CN110763770A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3933026A (en) * | 1974-07-31 | 1976-01-20 | Ham William C | Ultrasonic calibration standard |
| US5665893A (en) * | 1996-06-06 | 1997-09-09 | General Electric Company | Reference block for determining operating characteristics of ultrasonic transducer in right circular cylinder type probe |
| EP1860398A2 (en) * | 2006-05-24 | 2007-11-28 | Rolls-Royce plc | Calibration block |
| CN101806779A (en) * | 2010-04-30 | 2010-08-18 | 符丰 | Method for calibrating small-diameter probe for ultrasonic flaw detector |
| US20130180312A1 (en) * | 2012-01-13 | 2013-07-18 | Airbus Operations Limited | Calibration block and method |
| US20160231292A1 (en) * | 2014-04-23 | 2016-08-11 | Nanjing Develop Advanced Manufacturing Co., Ltd. | Heel test block |
| CN104297351A (en) * | 2014-10-29 | 2015-01-21 | 中广核检测技术有限公司 | Test block and method for measuring refraction angle of ultrasonic angle probe |
| CN204359756U (en) * | 2014-12-17 | 2015-05-27 | 国家电网公司 | A kind of porcelain insulator tilting probe measures Special test block |
| CN206038622U (en) * | 2016-09-20 | 2017-03-22 | 盘锦晨宇无损检测有限公司 | Calibration block for ultrasonic testing of interior excircle longitudinal joint |
| CN209014521U (en) * | 2018-09-26 | 2019-06-21 | 南京迪威尔高端制造股份有限公司 | Spill test block |
Non-Patent Citations (1)
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| 辽宁省安全科学研究院: "《超声检测》", 30 June 2017, 辽宁大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138231A (en) * | 2021-04-13 | 2021-07-20 | 武汉理工大学 | Ultrasonic phased array detection device and method for aero-engine case ring forging |
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