CN111678995A - A standard test plate of an automatic flaw detector for a plate and a method of using the same - Google Patents

Abstract

The invention discloses a standard test board for an automatic flaw detector for plates, which relates to the technical field of ultrasonic flaw detection. Depth varies. The invention also discloses a method for using the standard test plate of the plate automatic flaw detector. The defect design on the standard test plate of the plate automatic flaw detector provided by the invention is complete, which can truly reflect the flaw detection performance of the ultrasonic flaw detector, and avoid the phenomenon of missing detection of steel plate defects.

Description

A standard test plate of an automatic flaw detector for a plate and a method of using the same

technical field

The invention relates to the technical field of ultrasonic flaw detection, in particular to a standard test plate of an automatic flaw detector for sheet metal and a method for using the same.

Background technique

Ultrasonic automatic flaw detector is an internal quality inspection of steel pipes, steel bars and steel plates required for flaw detection on the steel production line, and online automatic flaw detection is carried out according to the standards and regulations corresponding to users in different countries, different contents and properties, so as to detect the internal defects of the steel. It is an important means to accurately determine the performance. Ultrasonic flaw detection belongs to non-destructive testing. The principle is: when the ultrasonic wave propagates in the steel plate, it has the characteristics of reflection on different quality interfaces. If a defect is encountered, the ultrasonic wave is reflected back on the defect, and the flaw detector can display the reflected wave.

In order to test the performance of automatic flaw detection equipment and probes and determine the flaw detection sensitivity, an automatic flaw detector test board is generally designed, various defects are made in the test board in advance, and the performance indicators of the equipment are displayed through the detection degree of each defect. In actual operation, it is stipulated that the test board is tested every 4 hours, and the current state of the equipment is determined by the completeness of each defect on the test board displayed on the map. Due to the different designs of test boards, some test boards are not fully designed and cannot reflect the real performance status of the equipment, which will result in missed detection of steel plate defects.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art, and to provide a standard test board of an automatic flaw detector for plates and a method of using the same.

In order to solve the above technical problems, the technical scheme of the present invention is as follows:

A standard test board for an automatic flaw detector for plates comprises a board body, the board body is provided with a number of flat-bottomed holes and a number of slots, and the diameters and depths of the several of the flat-bottomed holes are different.

As a preferred solution of the standard test plate of the automatic flaw detector for plates of the present invention, wherein: the flat-bottomed holes include a first row of holes, a second row of holes and a third row of holes that are equidistantly arranged along the width direction of the plate body The diameter of the first row of holes is 5mm, the diameter of the second row of holes is 3mm, the diameter of the third row of holes is 2mm, and the first row of holes, the second row of holes and the third row of holes are all 2mm in diameter. The depths of the flat-bottomed holes in the three rows of holes are successively increased.

As a preferred solution of the standard test plate of the plate automatic flaw detector of the present invention, wherein: the flat-bottomed hole further includes a fourth row of holes and a fifth row of holes that are equidistantly arranged along the width direction of the plate body. The fourth row of holes and the fifth row of holes are respectively located at both ends of the plate body in the length direction, and the distance between them and the end of the adjacent plate body is 20mm, and the fourth row of holes and the fifth row of holes include The flat-bottomed holes with a diameter of 3mm and a diameter of 5mm, and the flat-bottomed holes with a diameter of 3mm and the flat-bottomed holes with a diameter of 5mm are arranged alternately, and the depths of the flat-bottomed holes in the fourth row of holes and the fifth row of holes are sequentially Increment.

As a preferred solution of the standard test plate of the plate automatic flaw detector of the present invention, wherein: the thickness of the plate body is 30mm, the first row of holes, the second row of holes, the third row of holes, and the fourth row of holes and the fifth row of holes both include eight flat-bottomed holes, and the depths of the eight flat-bottomed holes in any row of holes are 1.5mm, 2mm, 8mm, 14mm, 20mm, 26mm, 28mm, and 28.5mm in sequence.

As a preferred solution of the standard test plate of the plate automatic flaw detector of the present invention, the distance between the two adjacent flat-bottomed holes in any row of holes is 50 mm.

As a preferred solution of the standard test plate of the plate automatic flaw detector of the present invention, wherein: the flat-bottomed hole further includes a sixth row of holes and a seventh row of holes arranged in sequence along the length direction of the plate body. The sixth row of holes and the seventh row of holes are located on both sides of the plate body, respectively, and the distance between them and the side edges of the adjacent plate body is 10mm, and the sixth row of holes and the seventh row of holes both include a diameter of 3mm. and flat-bottom holes with a diameter of 5mm, and the flat-bottom holes with a diameter of 3mm and the flat-bottom holes with a diameter of 5mm are alternately arranged, and the depths of the flat-bottom holes in the sixth row of holes and the seventh row of holes increase sequentially.

As a preferred solution of the standard test plate of the plate automatic flaw detector of the present invention, wherein: the sixth row of holes and the seventh row of holes include six flat-bottomed holes, and the depths of the six flat-bottomed holes are sequentially 2mm, 8mm, 14mm, 20mm, 26mm, 28mm.

As a preferred solution of the standard test plate of the automatic flaw detector for plates of the present invention, wherein: the slot includes a first slot body and a second slot body arranged along the width direction of the plate body and a third slot body arranged obliquely and parallel to each other The groove body and the fourth groove body, the first groove body, the second groove body, the third groove body and the fourth groove body are all 5mm in width and 5mm in depth.

A method for using a standard test board of a plate automatic flaw detector, comprising the following steps:

S1: The two rows of probes of the ultrasonic automatic flaw detector are arranged equidistantly along the width direction of the plate body. The distance between any two adjacent probes in each row of probes is 50mm, and the two rows of probes are staggered. The two rows of probes 100% full plane inspection of the board surface;

S2: The test board moves to the left at a constant speed until the test board moves out of the detection area of the probe, and the ultrasonic flaw detector displays the detected defects on the display;

S3: Compare the defects detected by the ultrasonic flaw detector with the defects existing on the test board to evaluate the performance of the ultrasonic flaw detector.

The beneficial effects of the present invention are:

The defect design on the standard test plate of the plate automatic flaw detector provided by the invention is complete, which can truly reflect the flaw detection performance of the ultrasonic flaw detector, and avoid the phenomenon of missing detection of steel plate defects.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the defect schematic diagram of the standard test board of the plate automatic flaw detector provided by the present invention;

FIG. 2 is a schematic view of the size of each flat-bottomed hole on the standard test plate of the automatic flaw detector for plates provided by the present invention;

Figure 3 is a schematic diagram of the position of the probe on the ultrasonic flaw detector during flaw detection.

Detailed ways

In order to make the content of the present invention easier to understand clearly, the present invention will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings.

This embodiment provides a standard test plate for an automatic flaw detector for plates, including a plate body with a thickness of 30 mm, and a number of flat-bottomed holes and a number of slots are opened on the plate body as defects on the test plate. The degree of detection of these defects can reveal the performance indicators of the equipment.

Specifically, the several flat-bottomed holes include a first row of holes (ie, the D row of holes in FIG. 1 ), a second row of holes (ie, the E row of holes in FIG. 1 ), a third row of holes, and a third A row of holes (ie, the F row of holes in Figure 1), the fourth row of holes (ie, the C row of holes in Figure 1) and the fifth row of holes (ie, the L row of holes in Figure 1), each row of holes includes eight holes For flat-bottomed holes, the numbers are D1~D8, E1~E8, F1~F8, C1~C8, L1~L8 respectively.

The diameters of the flat-bottomed holes (ie D1-D8) in the first row of holes are all 5mm, the diameters of the flat-bottomed holes (ie E1-E8) in the second row of holes are all 3mm, and the flat-bottomed holes in the third row of holes are all 3mm in diameter. (ie F1 to F8) are all 2mm in diameter, and the fourth row of holes and the fifth row of holes include four flat-bottom holes with a diameter of 5mm and four flat-bottom holes with a diameter of 3mm, and the flat-bottom holes with a diameter of 5mm are the same as Flat-bottomed holes with a diameter of 3 mm are arranged staggered in sequence along the width direction of the plate body. The depths of the flat-bottomed holes in the five rows of holes are increased in sequence, and the depths of the eight flat-bottomed holes in any row of holes are 1.5mm, 2mm, 8mm, 14mm, 20mm, 26mm, 28mm, and 28.5mm from top to bottom. The spacing between two adjacent flat-bottomed holes in any row of holes is 50mm.

It should be noted that the fourth row of holes (ie, the C row of holes) is adjacent to the left end of the plate body, and the distance between the left end of the flat-bottomed hole in the fourth row of holes and the left end of the plate body is 20mm, and the fifth row of holes (ie, L The row of holes) is adjacent to the right end of the plate body, and the distance between the right end of the flat-bottomed hole in the fifth row of holes and the right end of the plate body is 20 mm. The first row of holes, the second row of holes and the third row of holes are all located between the fourth row of holes and the fifth row of holes.

In addition, the flat-bottomed holes on the plate body also include a sixth row of holes (ie, the G row of holes in FIG. 1 ) and the seventh row of holes (ie, the H row of holes in FIG. 1 ) that are not equidistantly arranged along the length of the plate body. . The sixth row of holes (ie, the G row of holes) is adjacent to the upper end of the plate body, and the distance between the upper end of the flat-bottomed hole in the sixth row of holes and the upper end of the plate body is 10 mm. The seventh row of holes (ie, the H row of holes) is adjacent to the lower end of the plate body, and the distance between the lower ends of the flat-bottomed holes in the seventh row of holes and the lower end of the plate body is 10 mm.

The sixth row of holes and the seventh row of holes both include six flat-bottomed holes, and their corresponding numbers are G1 to G6 and H1 to H6 respectively. Among them, the diameters of G1, G3 and G5 and H1, H3 and H5 are 5mm, and the diameters of G2, G4 and G6 and H2, H4 and H6 are all 3mm. The depths of the six flat-bottomed holes in the sixth row of holes and the seventh row of holes are 2mm, 8mm, 14mm, 20mm, 26mm, and 28mm from left to right.

In addition, the slots provided on the plate body include a first slot body (ie, N1 in FIG. 1 ) and a second slot body (ie, N2 in FIG. 1 ) arranged along the width direction of the plate body, and a second slot body arranged obliquely and parallel to each other. The third slot body (ie M1 in Figure 1) and the fourth slot body (ie M2 in Figure 1), the width of the first slot body, the second slot body, the third slot body and the fourth slot body are all 5mm, Depth is 5mm.

When it is necessary to evaluate the flaw detection sensitivity that the ultrasonic flaw detector actually needs to achieve, the detection rate of the flat-bottomed hole with a diameter of 3 mm on the test plate can be evaluated by the ultrasonic flaw detector, that is, the detection of the second row of holes (E row of holes) The flat-bottomed holes in the second row of holes are arranged at equal distances along the width of the test plate, which is convenient to truly reflect the sensitivity of each probe of the ultrasonic flaw detector, and the different depths of the flat-bottomed holes in the second row of holes can represent the detection of different steel plate thicknesses range capabilities.

When it is necessary to evaluate the sensitivity of the ultrasonic flaw detector to detect the highest flaw detection standards at home and abroad, the detection rate of the flat-bottom hole with a diameter of 5mm on the test plate can be evaluated by the ultrasonic flaw detector, that is, the first row of holes (D Arranging the flat-bottomed holes in the second row of holes equidistantly along the width of the test plate can easily reflect the sensitivity of each probe of the ultrasonic flaw detector, while the depths of the flat-bottomed holes in the second row of holes are different. It can represent the ability to detect different steel plate thickness ranges.

When it is necessary to evaluate the best sensitivity that the ultrasonic flaw detector can achieve, the detection rate of the flat-bottomed hole with a diameter of 2 mm on the test plate can be evaluated by the ultrasonic flaw detector, that is, the detection of the third row of holes (F row of holes) The flat-bottomed holes in the third row of holes are arranged at equal distances along the width of the test plate, which is convenient to truly reflect the sensitivity of each probe of the ultrasonic flaw detector, and the different depths of the flat-bottomed holes in the third row of holes can represent the detection of different steel plate thicknesses range capabilities.

When it is necessary to evaluate the sensitivity of the ultrasonic flaw detector to the upper and lower blind areas of the plate, it can be evaluated according to the detection rate of C1, D1, E1, F1, C8, D8, E8, and F8. Among these eight flat-bottomed holes, C1, D1, The depths of E1 and F1 are both 1.5mm, while the depths of C8, D8, E8, and F8 are all 28.5mm. Since the thickness of the plate body is 30mm, the hole bottoms of the four flat-bottomed holes C8, D8, E8, and F8 are the same as the plate. The spacing between the back of the body is also 1.5mm.

When it is necessary to evaluate the sensitivity of the ultrasonic flaw detector to the blind area of the head and tail of the board, the evaluation can be made according to the detection rate of the fourth row of holes (C row of holes) and the fifth row of holes (L row of holes).

When it is necessary to evaluate the sensitivity of the ultrasonic flaw detector to the blind area at the edge of the plate, the evaluation can be made according to the detection rate of the sixth row of holes (G row of holes) and the seventh row of holes (H row of holes).

When it is necessary to evaluate the normal operation of the length measuring wheel of the ultrasonic flaw detector and the joint degree of the probes in rows A and B, the evaluation can be made according to the detection rate of the four grooves on the test board.

Therefore, the defect design on the standard test plate of the automatic plate flaw detector provided by the present invention is complete, which can truly reflect the flaw detection performance of the ultrasonic flaw detector and avoid the phenomenon of missing detection of steel plate defects.

This embodiment also provides a method for using a standard test board of an automatic flaw detector for a plate, comprising the following steps:

S1: Arrange the two rows of probes of the ultrasonic automatic flaw detector at equal distances in turn along the width direction of the plate. The distance between any two adjacent probes in each row of probes is 50mm, and the two rows of probes are staggered. When the left end of the test plate is below the probe, the probe automatically falls to the surface of the test plate; the probe is installed in the probe box, and there is a 0.3mm water film gap between the probe and the wear plate when the probe is calibrated, and the wear plate and the steel plate direct contact;

S2: The test board moves to the left at a constant speed until the test board moves out of the detection area of the probe, and the ultrasonic flaw detector displays the detected defects on the display;

S3: Compare the defects detected by the ultrasonic flaw detector with the defects existing on the test board to evaluate the performance of the ultrasonic flaw detector.

Generally, the flaw detection requirements of ultrasonic flaw detectors are: the detection rate of flat-bottom holes with a diameter of 5mm is 100%, the detection rate of flat-bottom holes with a diameter of 3mm is greater than or equal to 98%, and the detection rate of flat-bottom holes with a diameter of 2mm is not required. .

In addition to the above-mentioned embodiments, the present invention may also have other embodiments; all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims (9)

1. The utility model provides a panel automatic flaw detector standard testing board, includes the plate body, its characterized in that: a plurality of flat bottom holes and a plurality of slots are formed in the plate body, and the diameter and the depth of the flat bottom holes are different from each other.

2. The standard test board for automatic flaw detector of plates as claimed in claim 1, wherein: the flat bottom holes comprise a first row of holes, a second row of holes and a third row of holes which are arranged at equal intervals along the width direction of the plate body,

the diameter in first round of hole is 5mm, the diameter in second round of hole is 3mm, the diameter in third round of hole is 2mm, and in first round of hole, second round of hole and the third round of hole the degree of depth in flat hole increases progressively in proper order.

3. The standard test board for automatic flaw detector of plates according to claim 2, wherein: the flat bottom holes also comprise a fourth row of holes and a fifth row of holes which are arranged at equal intervals along the width direction of the plate body, the fourth row of holes and the fifth row of holes are respectively positioned at the two ends of the plate body in the length direction, and the distance between the end parts of the plate body and the adjacent end parts of the plate body is 20mm,

fourth round and fifth round all include that the diameter is 3mm and the diameter is 5 mm's flat bottom hole, and the diameter is 3mm the flat bottom hole is 5mm with the diameter the crisscross setting of flat bottom hole, in fourth round and the fifth round the degree of depth in flat bottom hole increases gradually in proper order.

4. The standard test board for automatic flaw detector of plates as claimed in claim 3, wherein: the thickness of plate body is 30mm, first round of hole, second round of hole, third round of hole, fourth round of hole and fifth round of hole all include eight flat-bottom holes, eight in any round of hole the degree of depth in flat-bottom hole is 1.5mm, 2mm, 8mm, 14mm, 20mm, 26mm, 28mm, 28.5mm in proper order.

5. The standard test board for automatic flaw detector of plates as claimed in claim 4, wherein: the distance between two adjacent flat-bottom holes in any row of holes is 50 mm.

6. The standard test board for automatic flaw detector of plates as claimed in claim 4, wherein: the flat bottom holes also comprise a sixth row of holes and a seventh row of holes which are sequentially arranged along the length direction of the plate body, the sixth row of holes and the seventh row of holes are respectively positioned at two sides of the plate body, the distance between the sixth row of holes and the seventh row of holes and the side edge of the adjacent plate body is 10mm,

sixth round of hole and seventh round of hole all include that the diameter is 3mm and the diameter is 5 mm's flat bottom hole, and the diameter is 3mm flat bottom hole is 5mm with the diameter the crisscross setting of flat bottom hole, in sixth round of hole and the seventh round of hole the degree of depth in flat bottom hole increases progressively in proper order.

7. The standard test board for automatic flaw detector of plates as claimed in claim 6, wherein: the sixth round with the seventh round all includes six flat bottom holes, and six the degree of depth in flat bottom hole is 2mm, 8mm, 14mm, 20mm, 26mm, 28mm in proper order.

8. The standard test board for automatic flaw detector of plates as claimed in claim 1, wherein: the groove comprises a first groove body and a second groove body which are arranged along the width direction of the plate body, and a third groove body and a fourth groove body which are parallel and obliquely arranged,

the width of the first groove body, the width of the second groove body, the width of the third groove body and the width of the fourth groove body are all 5mm, and the depth of the first groove body, the width of the second groove body, the width of the third groove body and the depth of the fourth groove body are all 5 mm.

9. A method for using the automatic flaw detector standard test plate for plate materials according to any one of claims 1 to 8, wherein the method comprises the following steps: the method comprises the following steps:

s1: arranging two rows of probes of the automatic ultrasonic flaw detector at equal intervals in sequence along the width direction of the plate body, wherein the distance between any two adjacent probes in each row of probes is 50mm, and the two rows of probes are arranged in a staggered manner and are arranged at the left end of the surface of the test plate;

s2: the test board moves leftwards at a constant speed until the test board moves out of the detection area of the probe, and the ultrasonic flaw detector displays the detected flaws on the display;

s3: and comparing the defects detected by the ultrasonic flaw detector with the defects on the test board, and evaluating the performance of the ultrasonic flaw detector.

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