Curved surface angle probe performance measurement test block

Abstract

The utility model discloses a test block for measuring the performance of a curved surface angle probe. The cross section of the test block is defined by a first arc section and a second arc section which are connected end to end; the curvature of the first arc section is smaller than that of the second arc section, and the circle center of the second arc section is located on the first arc section. A plurality of transverse through holes are formed in the test block in the thickness direction of the test block. The test block disclosed by the utility model can be used for conveniently measuring the angle of the curved surface angle probe with the refraction angle of 35-70 degrees.

Description

Technical Field

[0001] The utility model relates to a curved surface oblique probe performance measurement test block, belonging to the field of ultrasonic testing. Background Art

[0002] In ultrasonic testing, when using an oblique probe for testing, in order to locate the position of the detected defect, some performance parameters of the probe, such as the incident point, refraction angle, scanning speed and correction zero point, must be measured, otherwise the position of the defect cannot be accurately determined. When testing workpieces with circular surfaces such as rods and shafts from the outer cylindrical surface, in order to ensure that the ultrasonic wave can be effectively transmitted to the workpiece on the interface, it may be necessary to grind the probe so that the wedge can match the outer cylindrical surface of the workpiece. At this time, the contact surface of the probe changes from a flat surface to a curved surface, and the incident angle and refraction angle of the ultrasonic wave also change accordingly. Retesting is required during testing, but the current test blocks and test methods are blank.

[0003] Moreover, the parameters such as the incident point and refraction angle of the probe under different grinding conditions and the probe used for different time periods after grinding may also change, and need to be measured at any time.

[0004] Traditional test blocks for measuring parameters such as incident angle and refraction angle are IIW and IIW2 test blocks, but both are for flat probes and are not applicable to polished probes. There is currently no standard test block for measuring polished probes. Utility Model Content

[0005] The utility model aims to provide a test block for measuring the performance of a curved surface oblique probe, which can solve the problem in current ultrasonic testing that, when testing the outer circumferential surface of a rod-like, shaft-like workpiece or the like, the probe cannot be measured when parameters such as the incident point and the refraction angle are changed after being polished and are different from the nominal values.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A curved surface oblique probe performance measurement test block, the structural feature of which is that its cross section is formed by a first arc segment and a second arc segment connected end to end; the curvature of the first arc segment is smaller than the curvature of the second arc segment, and the center of the second arc segment is located on the first arc segment;

[0008] The test block is provided with a plurality of transverse through holes along the thickness direction thereof.

[0009] The cross section defined in the present invention is a cross section perpendicular to the thickness direction of the test block.

[0010] Therefore, by opening a plurality of transverse through holes in the thickness direction of the test block, probes with refraction angles in different ranges can be conveniently measured.

[0011] According to the embodiments of the present invention, the present invention can be further optimized. The following is the technical solution formed after optimization:

[0012] In one preferred embodiment, the first arc segment is provided with scale lines, and the scale lines can be provided to facilitate measurement.

[0013] In one preferred embodiment, there are three transverse through holes from top to bottom, namely, a first transverse through hole, a second transverse through hole and a third transverse through hole. Further, the spacing between the first transverse through hole and the second transverse through hole is smaller than the spacing between the second transverse through hole and the third transverse through hole.

[0014] In one preferred embodiment, the first transverse through hole, the second transverse through hole and the third transverse through hole have the same aperture. Generally speaking, the apertures of the first transverse through hole, the second transverse through hole and the third transverse through hole are 3 mm, 4 mm or 5 mm.

[0015] In one preferred embodiment, the test block is made of the same material as the workpiece to be tested, and the radius of the first arc segment is the same as the radius of the workpiece to be tested.

[0016] In one preferred embodiment, the radius of the second arc segment is 100 mm, 200 mm or 300 mm.

[0017] The thickness of the test block is greater than the thickness of the probe. Generally speaking, the thickness of the test block is 20 mm or 25 mm.

[0018] Compared with the prior art, the utility model has the beneficial effect that the test block of the utility model can conveniently measure the angle of the curved surface oblique probe with a refraction angle between 35° and 70°. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram (front view) of an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 Rear view of

[0021] Figure 3 yes Figure 1 Side view of

[0022] Figure 4 It is a schematic diagram of the first step when the utility model is used for testing;

[0023] Figure 5 It is a schematic diagram of the second step when the utility model is used for testing;

[0024] Figure 6 This is a schematic diagram of probe placement when the utility model is used for testing;

[0025] Figure 7 It is a schematic diagram of waveform display of the ultrasonic flaw detector when the utility model is tested. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0027] The material of the test block used for grinding the angle probe for measurement in this embodiment is the same as the material and heat treatment state of the inspected workpiece.

[0028] like Figure 1-3 As shown, the test block is composed of two first arc segments 1 and second arc segments 2 connected end to end. The radius of the first arc segment 1 is R1, and the radius of the second arc segment 2 is R2. The center of the second arc segment 2 is point 0, which is located on the first arc segment 1. A rectangular engraved line is provided at point 0.

[0029] There are three transverse through holes on one side of the test block, which are the first transverse through hole 3, the second transverse through hole 4 and the third transverse through hole 5 from top to bottom. The diameters of the three transverse through holes are fixed values, such as 3mm, 4mm or 5mm. Among them, the first transverse through hole 3 is used to measure the probe with a refraction angle of 65° to 70°, and there are corresponding rectangular engraved lines on the first arc segment 1; the second transverse through hole 4 is used to measure the probe with a refraction angle of 50° to 65°, and there are corresponding rectangular engraved lines on the first arc segment 1; the third transverse through hole 5 is used to measure the probe with a refraction angle of 35° to 50°, and there are corresponding rectangular engraved lines on the back of the first arc segment 1.

[0030] The radius R1 of the first arc segment 1 is the same as the outer diameter of the workpiece under inspection.

[0031] The radius R2 of the second arc segment 2 takes a fixed value, such as 100 mm, 200 mm or 300 mm.

[0032] The thickness of the test block must be greater than the thickness of the detection probe. Generally speaking, the thickness of the test block is a fixed value, such as 20mm or 25mm.

[0033] When the test block of this embodiment is used for testing, the specific operation steps are as follows:

[0034] S1. Place the polished probe on the first arc segment 1, with the front end of the probe pointing to the side without the first transverse through hole 3, the second transverse through hole 4, and the third transverse through hole 5. Because the first arc segment 1 is the same as the actual test workpiece, the two must fit together. Adjust the instrument so that the reflected wave of the second arc segment 2 is displayed on the instrument. Move the probe around 0, and there will be only one point with the strongest reflected wave. At this time, the position where the test block corresponding to the 0 scale line contacts the probe is the incident point of the oblique probe. Note this point. Figure 4 As shown, the distance between this point and the front end of the probe is the leading edge length of the probe.

[0035] S2. Place the polished probe on the first arc segment 1, with the front end of the probe pointing to the side with the first transverse through hole 3, the second transverse through hole 4, and the third transverse through hole 5. Figure 5 As shown, move the probe back and forth to find the highest waves of the probe in the first transverse through hole 3, the second transverse through hole 4, and the third transverse through hole 5 respectively. Among them, the hole corresponding to the highest wave among the three waves, and the scale corresponding to the position of the probe incident point, is the refraction angle of the probe.

[0036] S3, place the polished probe on the first arc segment 1, with the front end of the probe pointing to the side without the first transverse through hole 3, the second transverse through hole 4, and the third transverse through hole 5. Figure 6 and 7 As shown, adjust the instrument and make the primary and secondary bottom surface waves of the arc surface correspond to the corresponding multiple scales of the instrument respectively. The position corresponding to the zero point of the instrument scale is the calibration zero point. The actual sound path corresponding to each grid of the instrument can also be calculated.

[0037] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the embodiments by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A curved surface angle probe performance measurement test block, characterized in that: Its cross section is formed by a first arc segment (1) and a second arc segment (2) connected end to end; the curvature of the first arc segment (1) is smaller than the curvature of the second arc segment (2), and the center of the second arc segment (2) is located on the first arc segment (1); The test block is provided with a plurality of transverse through holes along its thickness direction; the transverse through holes are three in number from top to bottom, namely a first transverse through hole (3), a second transverse through hole (4) and a third transverse through hole (5); the spacing between the first transverse through hole (3) and the second transverse through hole (4) is smaller than the spacing between the second transverse through hole (4) and the third transverse through hole (5); The test block is made of the same material as the workpiece being tested, and the radius of the first arc segment (1) is the same as the radius of the workpiece being tested.

2. The curved surface angle probe performance measurement test block according to claim 1, characterized in that: The first arc segment (1) is provided with scale lines.

3. The curved surface angle probe performance measurement test block according to claim 1, characterized in that: The first transverse through hole (3), the second transverse through hole (4) and the third transverse through hole (5) have the same hole diameter.

4. The curved surface angle probe performance measurement test block according to claim 1, characterized in that: The diameters of the first transverse through hole (3), the second transverse through hole (4) and the third transverse through hole (5) are 3 mm, 4 mm or 5 mm.

5. The curved surface angle probe performance measurement test block according to any one of claims 1 to 4, characterized in that: The radius of the second circular arc segment (2) is 100 mm, 200 mm or 300 mm.

6. The curved surface angle probe performance measurement test block according to any one of claims 1 to 4, characterized in that: The thickness of the test block is greater than the thickness of the probe.

7. The curved surface angle probe performance measurement test block according to any one of claims 1 to 4, characterized in that: The thickness of the test block is 20 mm or 25 mm.

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