CN212060079U - Calibration test block for roll surface wave detection - Google Patents

Abstract

The utility model discloses a roll surface wave detects uses calibration test block belongs to roll detection technology field. The utility model discloses the calibration test block is taken from because of the condemned roll of accident to including the test block body, the radial central point of test block body puts the mark defect region, and the defect region is along the axial extension of test block body, and the length of defect region keeps unanimous with the axial length of test block body, and from the top down has marked many scale marks in proper order on the arc surface of the radial one side of test block body, and the other correspondence of every scale mark has marked the distance number between this scale mark and the defect region. The utility model aims to overcome current calibration test block can not satisfy the not enough of roll surface wave sensitivity inspection effect, not only can avoid not only can avoiding because the different sensitivity that arouses of the decay coefficient that causes of test block surface material is unable correct adjustment, can also avoid causing the not enough or too big error that arouses of sensitivity because the coupling difference that detects the contact surface.

Description

Calibration test block for roll surface wave detection

Technical Field

The utility model relates to a roll detects technical field, more specifically says, relates to roll surface wave detects uses calibration test block.

Background

The roller is an important steel rolling production tool, and plays a decisive role in the deformation of steel to a finished product in the steel rolling process. Because of direct contact with the rolled piece, the condition of the roll in operation directly affects the surface quality and production stability of the steel product. The most common roll defects and failure problems are the generation of various cracks on the surface and a series of failure problems of roll surface peeling, breakage and the like caused by the cracks.

During the manufacturing and using process of the roller, the near-surface defect of the roller body is a common but not allowed dangerous defect, because the defect easily causes roller burst during the manufacturing process, and the defect easily causes rolling accidents such as peeling during the using process. Therefore, the defect size and depth are detected and determined in advance, and the method has great significance for manufacturing and using the roller. At present, the roller is generally detected by adopting nondestructive ultrasonic wave to carry out surface wave detection, a calibration test block is generally required to be used for detecting and adjusting the sensitivity of a detection probe before detection, but most of the calibration test blocks for the roller surface wave detection are flat plates, the coupling between the detection probe and a test block contact surface during calibration is different from the coupling between the detection probe and the roller surface during actual use, and the test blocks are generally made of wear-resistant materials and have larger attenuation, so the existing calibration test blocks cannot meet the detection effect on the sensitivity of the roller surface wave.

Through retrieval, a large number of patents have been published on roll detection, such as chinese patent application No.: 2018114226302, the name of invention creation is: the application discloses a method for measuring the radial depth of the near surface defect of the cylindrical curved surface and a test block adopted by the method, wherein the test block is a cylinder consisting of a plane and an arc surface; three transverse through holes with the diameter of 2mm are axially arranged on the column body. The measurement method is as follows: firstly, making a test block; adjusting a time base line and sensitivity on a test block by adopting an inclined probe; determining reference sensitivity, scanning sensitivity, a quantitative line and an evaluation line; thirdly, defect detection is carried out on the curved surface of the cylinder to be detected by adopting an inclined probe in a sound path of 1: 1, and the radial depth of the near-surface defect is calculated according to a calculation formula. The method of the scheme combines an inclined probe and a sound path method, selects the inclined probe with a refraction angle of 60 degrees, utilizes the test block to adjust the time base line and the sensitivity, and determines the depth calculation formula, thereby being capable of measuring the small near-surface defect with the radial depth of less than or equal to 5mm, avoiding the omission of the small near-surface defect and providing convenience and safety for the manufacture and the use of the roller. The scheme is a good exploration for roll detection, but the exploration for roll detection in the industry is never stopped.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome current calibration test block can not satisfy the not enough of roll surface wave sensitivity inspection effect, thereby a roll surface wave detects uses calibration test block is provided, thereby not only can avoid because the different decay coefficient that causes of test block surface material leads to the not enough and hourglass of arousing of test probe sensitivity to examine, can also avoid because the coupling difference that detects the contact surface causes the not enough or too big and error that arouses of sensitivity, there is more objective clear inspection to detectivity, the accuracy and the efficiency that improve roll detection.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a roll surface wave detects uses calibration test block, calibration test block is taken from the condemned roll because of the accident, and including the test block body that is half hollow cylinder structure, the radial central point of test block body puts the mark defect region, the axial extension of test block body is followed to the defect region, and the length of defect region keeps unanimous with the axial length of test block body, from the top down has marked many scale marks in proper order on the arc surface of the radial one side of test block body, many scale marks are located the tip position of test block body axial one side, and every other correspondence of scale mark has marked the distance digit between this scale mark and the defect region.

As a further improvement, the test block body is provided with the roughness region on the side arc surface of the scale mark, and the top of the roughness region extends over the first scale mark at the top of the side arc surface, and the bottom of the roughness region extends over the last scale mark at the bottom of the side arc surface.

As a further improvement, the axial uniform interval along the test block body on this side arc surface that sets up the scale mark on the test block body is provided with a plurality of roughness regions, and the roughness numerical value that every roughness region corresponds is inequality.

As a further improvement, the roughness values corresponding to a plurality of roughness regions are gradually increased along the axial direction of the test block body.

As a further improvement, the roughness values corresponding to a plurality of roughness regions are gradually reduced along the axial direction of the test block body.

As a further improvement of the present invention, the defects in the defect area include transverse cracks, longitudinal cracks and holes.

As a further improvement, the calibration test block is a set of test block, and this set of test block is taken from a set of condemned roll because of the accident, and the material of this group condemned roll is the same, but the size is different.

As a further improvement, the calibration test block is a set of test block, and this set of test block is taken from a set of condemned roll because of the accident, and the material of this group condemned roll is different, but the size is the same.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) the utility model discloses a roll surface wave detects uses calibration test block, calibration test block is taken from the condemned roll because of the accident, adopt and process the calibration test block because of the condemned roll of accident, the inspection site has been restoreed, thereby be equivalent to concrete problem concrete analysis, thereby can effectively avoid leading to the missing of arousing that the decay coefficient is different because calibration test block and roll surface material are different to cause the detection probe sensitivity to examine, secondly can avoid causing the not enough or too big detection error that arouses of sensitivity because the coupling difference that detects the contact surface. Utilize the roller that has scrapped to undercut inside and form the test block body of half hollow cylinder structure, its inside is undercut and is convenient for place and carry, and appearance, the material of this test block body are the same with waiting to detect the roller, not only can carry out reutilization with scrapped roller, can also have more clear objective inspection to the roller detection.

(2) The utility model discloses a roll surface wave detects uses calibration test block, the distance between the side mark of test block body and the defective area is convenient for more digital and accurate when the sensitivity of calibration test probe. The defects in the defect area comprise transverse cracks, longitudinal cracks and holes, the defects in the defect area are formed naturally on the surface of the scrapped roll, and the transverse cracks, the longitudinal cracks and the holes are three defects which are often found in the actual detection of the defects of the roll, so that the reflected waves of the three defects can be known more intuitively by using the scrapped roll as a calibration test block, the wave height of the reflected waves is what the reflected wave height of each defect is at various distances, and the method is favorable for distinguishing the harmful defects in the actual detection of the defects of the roll. And the defect type on original flat calibration test block is fixed aperture usually, the calibration test block of this scheme adopts the accident to scrap the roll, and simulate out the defect (such as horizontal crack, vertical crackle and hole) that roll surface and shallow surface probably appear in the actual production above that, through the different defects of different degree of depth, distance, it is suitable that fully inspect test probe's sensitivity, the pertinence is stronger when actually detecting, the testing result is more accurate, can in time discover the harmfulness defect on the roll, thereby avoid the emergence of accident.

(3) The utility model discloses a roll surface wave detects uses calibration test block, the even interval of axial along the test block body is provided with a plurality of roughness regions on this side cambered surface that sets up the scale mark on the test block body, and the roughness numerical value that every roughness region corresponds is inequality, can correspond the different roughness of same distance, different apart from the same roughness. Because the main influence variables of the sensitivity of the detection probe comprise three variables of distance, defect type and roughness, the test block body is divided into a plurality of different areas, one variable is changed, and the other two variables are kept unchanged, so that the influence variable of the detection probe is controlled, the influence degree of the variables is quantized, data collection is facilitated, and data and technical support are provided for realizing automatic detection in the future.

(4) The utility model discloses a roll surface wave detects uses calibration test block, calibration test block are a set of test block, and this group of test block is taken from a set of condemned roll because of the accident, and the material of this group condemned roll is different, but the size is the same. Because the surface attenuation of the rollers made of different materials is different, a group of test blocks can be manufactured by using the scrapped rollers made of different materials, and before the rollers made of different materials are detected, the sensitivity of the detection probe can be adjusted by using the calibration test block matched with the scrapped rollers, so that the sensitivity adjustment of the detection probe has pertinence and reliability.

Drawings

Fig. 1 is a schematic view of a calibration block for roll surface wave test according to the present invention;

fig. 2 is a schematic structural view of a calibration block for roll surface wave test according to the present invention;

fig. 3 is a left side view of the structure of fig. 2.

The reference numerals in the schematic drawings illustrate:

100. a test block body; 110. a defective region; 120. a roughness area; 130. scale lines; 200. and (6) detecting the probe.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be further described with reference to the following examples.

Example 1

At present, the calibration test block for roll surface wave detection adopted in the industry is a flat plate type test block, and the surface attenuation of the flat plate type calibration test block is smaller relative to the rough surface of the roll, so that when an operator adjusts the sensitivity of the detection probe 200 on the flat plate type calibration test block and uses the detection probe 200 with the adjusted sensitivity to actually detect the roll defect, the sensitivity of the detection probe 200 cannot meet the requirement of actual detection. The sensitivity is the ability of ultrasonic wave to detect defects, and since the sensitivity of surface wave varies with the distance, the ability of surface wave to detect defects is weaker when the distance is longer, the ability of surface wave to detect defects is weaker when the surface is rougher, and the energy of surface wave is attenuated both in the long-distance transmission and the transmission of rough surface of roll, the requirement of detection on roll can not be satisfied when the sensitivity of the detection probe 200 is verified by using a flat plate type test block with smaller surface roughness. Secondly, because the shape of the roller is circular, and the detection probe 200 is plane square, the coupling of the contact surface is different during detection, which also has great influence on the detection, and the original flat test block can not meet the detection requirement on the surface wave sensitivity of the roller aiming at the current situation.

With reference to fig. 1 to 3, the calibration block for roll surface wave detection in this embodiment is obtained from a roll scrapped due to an accident, and the roll scrapped due to the accident is used to process the calibration block, so as to restore the detection field, which is equivalent to the specific problem analysis, thereby effectively avoiding missed detection caused by insufficient sensitivity of the detection probe due to different attenuation coefficients caused by different materials of the calibration block and the roll surface, and secondly avoiding detection errors caused by insufficient or excessive sensitivity due to different couplings of the detection contact surfaces. This embodiment is including the test block body 100 that is half hollow cylinder structure, utilizes the roller that has scrapped to undercut inside test block body 100 that forms half hollow cylinder structure, and its inside is undercut and is convenient for place and carry, and this test block body 100's appearance, material and wait to detect the roller the same, not only can carry out reutilization with condemned roller, can also have more clear objective inspection to the roller detection.

With reference to fig. 1-3, in the present embodiment, the radial center position of the test block body 100 is marked with the defective region 110, that is, as shown in the orientation shown in fig. 1, the top center position of the test block body 100 is provided with the defective region 110, the defective region 110 extends along the axial direction of the test block body 100, and the length of the defective region 110 is consistent with the axial length of the test block body 100, that is, as shown in the orientation shown in fig. 3, the defective region 110 extends along the length direction of the test block body 100, and both ends of the defective region 110 in the length direction are consistent with both ends of the test block body 100 in the length direction. In this embodiment, a plurality of scale marks 130 are sequentially marked on the arc surface on one radial side of the test block body 100 from top to bottom, the plurality of scale marks 130 are located at the end position on one axial side of the test block body 100, and distance numbers between the scale marks 130 and the defect area 110 are correspondingly marked beside each scale mark 130. As shown in the orientation of fig. 3, a plurality of scale marks 130 are sequentially marked on the front arc surface of the test block body 100 from top to bottom, the scale marks 130 are located at the left end of the test block body 100, and numbers of arc length distances between the scale marks 130 and the defect area 110 are correspondingly marked beside each scale mark 130, such as the arc length distances shown in fig. 3 of 100mm, 300mm, 700mm, and the like. The distance between the lateral marking of the test block body 100 and the defect region 110 facilitates greater digitization and accuracy in calibrating the sensitivity of the inspection probe 200. The defects in the defect area 110 comprise transverse cracks, longitudinal cracks and holes, the defects in the defect area 110 are formed naturally on the surface of the scrapped roll, and the transverse cracks, the longitudinal cracks and the holes are three defects which are often found in actual detection of the defects of the roll, so that the reflected waves of the three defects can be known more intuitively by using the scrapped roll as a calibration test block, the wave height of the reflected waves is what, and the reflected wave height of each defect at various distances is what, which is helpful for distinguishing the harmful defects in actual detection of the defects of the roll. And the defect type on original flat calibration test block is fixed aperture usually, the calibration test block of this embodiment adopts the accident to scrap the roll to simulate out the defect (such as horizontal crack, vertical crackle and hole) that roll surface and shallow surface probably appear in the actual production above that, through the different defect of different degree of depth, different distances, whether the sensitivity of fully examining test probe 200 is suitable, the pertinence is stronger during the actual detection, the testing result is more accurate, can in time discover the harmfulness defect on the roll, thereby avoid the emergence of accident.

As shown in fig. 3, in this embodiment, a roughness area 120 is disposed on the side arc surface of the test block body 100 on which the scale marks 130 are disposed, the top of the roughness area 120 extends beyond the first scale mark 130 at the top of the side arc surface, and the bottom of the roughness area 120 extends beyond the last scale mark 130 at the bottom of the side arc surface, specifically, in this embodiment, a roughness area 120 is disposed on the front side arc surface of the test block body 100, the top of the roughness area 120 extends to the bottom edge of the defect area 110, the bottom of the roughness area 120 extends to the bottom edge of the front side arc surface of the test block body 100, and the roughness area 120 has a certain width along the axial extension of the test block body 100. As shown in fig. 3, in this embodiment, a plurality of roughness regions 120 are uniformly arranged on the arc surface of the side of the test block body 100, on which the scale mark 130 is arranged, at intervals along the axial direction of the test block body 100, and the roughness value corresponding to each roughness region 120 is different, and can correspond to different roughnesses at the same distance and different roughnesses at the same distance. Because the main influence variables of the sensitivity of the detection probe 200 comprise three variables of distance, defect type and roughness, the test block body 100 is divided into a plurality of different areas, one variable is changed, and the other two variables are kept unchanged, so that the influence variables of the detection probe 200 are controlled, the influence degree of the variables is quantized, data collection is facilitated, and data and technical support are provided for realizing automatic detection in the future. Specifically, in the present embodiment, the roughness values corresponding to the plurality of roughness areas 120 gradually increase along the axial direction of the test block body 100, so as to facilitate data analysis and collection.

The calibration test block in this embodiment is a set of test blocks, the set of test blocks is taken from a set of rollers scrapped due to accidents, and the set of scrapped rollers are made of different materials and have the same size. Because the roll surfaces made of different materials are attenuated differently, a group of test blocks can be manufactured by using the scrapped rolls made of different materials, and before the rolls made of different materials are detected, the sensitivity of the detection probe 200 can be adjusted by using the calibration test block matched with the scrapped rolls, so that the sensitivity adjustment of the detection probe 200 has higher pertinence and reliability.

Example 2

The roll surface wave test calibration block of the present embodiment has basically the same structure as that of embodiment 1, but differs therefrom in that the roughness values corresponding to the plurality of roughness regions 120 are gradually reduced in the axial direction of the block body 100 as shown in fig. 3.

The calibration test block is a group of test blocks in the embodiment, the group of test blocks is taken from a group of rollers scrapped due to accidents, the group of scrapped rollers are the same in material, but different in size, the rollers with the same material and different sizes are conveniently subjected to targeted sensitivity adjustment on the detection probe 200 before detection, so that the detection probe is more consistent with an actual detection environment, and the detection result is more accurate.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (8)

1. The roll surface wave detects and uses calibration test block, its characterized in that: the calibration test block is taken from a roller scrapped due to an accident and comprises a test block body (100) of a semi-hollow cylinder structure, wherein a defective area (110) is marked at the radial center position of the test block body (100), the defective area (110) extends along the axial direction of the test block body (100), the length of the defective area (110) is consistent with the axial length of the test block body (100), a plurality of scale marks (130) are sequentially marked on the arc surface of one radial side of the test block body (100) from top to bottom, the plurality of scale marks (130) are located at the end position of one axial side of the test block body (100), and distance numbers between the scale marks (130) and the defective area (110) are correspondingly marked beside each scale mark (130).

2. The calibration block for roll surface wave test according to claim 1, wherein: the side arc surface provided with the scale marks (130) on the test block body (100) is provided with a roughness area (120), the top of the roughness area (120) extends over the first scale mark (130) at the top of the side arc surface, and the bottom of the roughness area (120) extends over the last scale mark (130) at the bottom of the side arc surface.

3. The calibration block for roll surface wave test according to claim 2, wherein: the side arc surface that sets up scale mark (130) on test block body (100) is provided with a plurality of roughness region (120) along the even interval of the axial of test block body (100), and the roughness numerical value that every roughness region (120) correspond is inequality.

4. The calibration block for roll surface wave test according to claim 3, wherein: the roughness values corresponding to the plurality of roughness regions (120) gradually increase along the axial direction of the test block body (100).

5. The calibration block for roll surface wave test according to claim 3, wherein: the roughness values corresponding to the plurality of roughness regions (120) gradually decrease along the axial direction of the test block body (100).

6. The calibration block for roll surface wave test as set forth in any one of claims 1 to 5, wherein: defects within the defect region (110) include transverse cracks, longitudinal cracks, and holes.

7. The calibration block for roll surface wave test according to claim 1, wherein: the calibration test block is a group of test blocks, the group of test blocks are taken from a group of rollers scrapped due to accidents, and the group of scrapped rollers are made of the same material but have different sizes.

8. The calibration block for roll surface wave test according to claim 1, wherein: the calibration test block is a group of test blocks, the group of test blocks are taken from a group of rollers scrapped due to accidents, and the group of scrapped rollers are different in material and same in size.

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