A method of ultrasonically detecting the location of a preassembled weldment

Abstract

The application relates to the technical field of welding positioning, and discloses a method for detecting the position of a welded structure by ultrasonic waves, when the thickness detected by a straight ultrasonic probe suddenly and greatly increases, the center position of the straight ultrasonic probe is judged to correspond to the position of one side of the welded structure; when the flat plate and the welded structure are non-penetration welding connection, the thickness detected by the straight ultrasonic probe again suddenly and greatly increases, the center position of the straight ultrasonic probe is judged to correspond to the position of one side of the welded structure; when the flat plate and the welded structure are full-penetration welding connection, the thickness detected by the straight ultrasonic probe suddenly and greatly decreases, the center position of the straight ultrasonic probe is judged to correspond to the position of one side of the welded structure; thereby the positions of two sides of the welded structure are determined, holes need not to be formed, the operation is simple, and the detection is accurate and high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding positioning, in particular to a method for detecting the position of a welded structure by ultrasonic waves. BACKGROUND

[0002] When one side of a thin flat plate (less than 20 mm) is pre-installed and welded with a structure, due to the effect of welding stress, the flat plate will have obvious angular deformation at the corresponding position of the welded structure (the other side), i.e. the welded structure position protrudes and the adjacent position is concave (i.e. the so-called thin horse deformation), at which time the accurate position of the welded structure on the back of the flat plate can be determined intuitively. However, when one side of a thick flat plate (greater than or equal to 20 mm) is pre-installed and welded with a structure, due to the limited deformation effect of the welding stress on the thick plate, the flat thick plate will not have obvious angular deformation at the corresponding position of the welded structure, and the accurate position of the welded structure on the back of the flat plate cannot be determined intuitively. If a structure needs to be installed at the corresponding position of the welded structure of the thick plate, it is difficult to ensure that the to-be-installed structure is aligned with the installed structure at the corresponding position, i.e. the structure is misaligned, which does not meet the design requirements and causes adverse consequences. In order to determine the position of the welded structure, the inspection line method or the temporary opening inspection method is generally used.

[0003] The inspection line method is to draw installation inspection lines of all structure positions on both sides of the flat plate in advance, and then install all structures according to the positions of the inspection lines and the thickness direction of the plate. However, the lines are drawn during the blanking stage of the flat plate, and there is a certain degree of welding shrinkage deformation during the splicing process of multiple plates in the later stage, which reduces the accuracy of part of the drawn lines. When multiple plate splicing seams exist at the same time, the accumulated error will increase. In the later construction links, especially in the welding and fire adjustment and other hot work links, the drawn inspection lines are easily damaged accidentally, which leads to the fact that the original drawn line positions cannot be found or seen clearly in the subsequent processes.

[0004] The temporary opening inspection method is to preliminarily determine the approximate position and direction of the welded structure according to the drawings and the site conditions, and then temporarily open a detection hole at a proper distance position. The distance (L1) from the edge of the temporary detection hole to the welded structure is measured, and the corresponding position of the center line of the welded structure on the other side of the flat plate is determined according to the thickness of the welded structure (see Figure 1The center line is drawn. Then, the drawn center line of the welded structure is taken as the center line of the to-be-welded structure, and the installation inspection line of the to-be-welded structure is determined according to the thickness of the to-be-welded structure. Finally, the temporary detection hole is welded and sealed back. However, this method needs to open a temporary detection hole in the originally intact flat plate, which is a destructive testing method. The verticality of the opening hole greatly affects the accuracy of the line drawing. Before the hole sealing welding, the temporary detection hole needs to be opened and polished according to the welding process requirements, and the stress in the hole sealing welding construction area is not easy to release, which is easy to produce welding cracks and other defects. Special materials also need to increase the post-welding treatment process, the construction period is long, and after the hole sealing welding is completed, the hole sealing welding area needs to be ground and 100% nondestructive testing, which has welding quality risks. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a method for detecting the position of a welded structure by ultrasonic detection of thickness, which is simple to operate and has high detection accuracy.

[0006] In order to achieve the above-mentioned purpose, the present application provides a method for detecting the position of a welded structure by ultrasonic detection, comprising the following steps:

[0007] S1: placing an ultrasonic straight probe on a flat plate, and ensuring that the ultrasonic straight probe is located on one side of the welded structure, at this time, the thickness detected by the ultrasonic straight probe is the thickness of the flat plate;

[0008] S2: moving the ultrasonic straight probe along the length direction of the flat plate to approach the welded structure, when the thickness detected by the ultrasonic straight probe starts to increase, at this time, the center position of the ultrasonic straight probe corresponds to the edge position of the outer leakage weld leg area of one side of the welded structure;

[0009] S3: continuing to move the ultrasonic straight probe in the original direction, when the thickness detected by the ultrasonic straight probe suddenly increases greatly, at this time, the center position of the ultrasonic straight probe corresponds to the edge position of the fillet weld penetration area of the welded structure, and the center position of the ultrasonic straight probe is marked as a first side mark point on the flat plate;

[0010] S4: when the flat plate and the welded structure are non-penetration connected, continuing to move the ultrasonic straight probe in the original direction, at this time, the thickness detected by the ultrasonic straight probe becomes the thickness of the flat plate, the ultrasonic straight probe keeps moving, when the thickness detected by the ultrasonic straight probe suddenly increases again greatly, at this time, the center position of the ultrasonic straight probe corresponds to the edge position of the fillet weld penetration area of the other side of the welded structure, and the center position of the ultrasonic straight probe is marked as a second side mark point on the flat plate.

[0011] When the plane plate and the assembled welding structure are full penetration connection, the straight ultrasonic probe is continuously moved in the original direction, at this time, the thickness detected by the straight ultrasonic probe remains unchanged, the straight ultrasonic probe keeps moving, when the thickness detected by the straight ultrasonic probe suddenly decreases greatly, at this time, the center position of the straight ultrasonic probe corresponds to the edge position of the fillet weld penetration area on the other side of the assembled welding structure, and the center position of the straight ultrasonic probe is marked as a second side mark point on the plane plate;

[0012] S5: repeating S1-S4, marking another first side mark point and another second side mark point on the plane plate, connecting two first side mark points to form a first side mark line, and connecting two second side mark points to form a second side mark line.

[0013] As a preferred scheme of the present application, a first vertical line and a second vertical line are drawn on the plane plate, the first vertical line is perpendicular to the first side mark line, one end of the first vertical line is connected with the first side mark line, the other end of the first vertical line is connected with the second side mark line, the second vertical line is perpendicular to the second side mark line, one end of the second vertical line is connected with the first side mark line, and the other end of the second vertical line is connected with the second side mark line, and then a perpendicular bisector of the first vertical line and a perpendicular bisector of the second vertical line are drawn respectively.

[0014] As a preferred scheme of the present application, a test line parallel to the perpendicular bisector of the first vertical line is drawn on the plane plate, and multiple dot punch points are punched along the test line.

[0015] As a preferred scheme of the present application, after S4, the straight ultrasonic probe is continuously moved in the original direction, and it is confirmed whether the thickness detected by the straight ultrasonic probe gradually decreases and finally is the thickness of the plane plate.

[0016] Meanwhile, the present application also provides a method for detecting the position of an assembled welding structure, comprising the following steps:

[0017] S1: a straight ultrasonic probe is arranged on a plane plate, and it is ensured that the straight ultrasonic probe is located on one side of an assembled welding structure, at this time, the thickness detected by the straight ultrasonic probe is the thickness of the plane plate;

[0018] S2: the straight ultrasonic probe is moved along the length direction of the plane plate to approach the assembled welding structure, when the thickness detected by the straight ultrasonic probe starts to increase, at this time, the center position of the straight ultrasonic probe corresponds to the edge position of the outer leakage weld leg area of the assembled welding structure;

[0019] S3: the ultrasonic straight probe continues to move in the original direction, when the thickness detected by the ultrasonic straight probe suddenly increases greatly, at this time, the center position of the ultrasonic straight probe corresponds to the edge position of one side of the fusion depth area of the fillet weld of the welded structure, and the center position of the ultrasonic straight probe is marked as a first side mark point on the flat plate;

[0020] S4: the operations of S1-S3 are repeated, another first side mark point is marked on the flat plate, and then two first side mark points are connected to form a first side mark line.

[0021] As a preferred scheme of the present application, after S3, the ultrasonic straight probe continues to move in the original direction, and it is confirmed whether the back detected by the ultrasonic straight probe gradually decreases and finally is the thickness of the flat plate.

[0022] The method for detecting the position of the welded structure by ultrasonic waves in the embodiment of the present application has the following beneficial effects compared with the prior art: the position of the welded structure is determined by detecting the thickness by the ultrasonic straight probe, when the thickness detected by the ultrasonic straight probe suddenly increases greatly, it is determined that the center position of the ultrasonic straight probe corresponds to the position of one side of the welded structure; when the flat plate and the welded structure are non-penetration connection, when the thickness detected by the ultrasonic straight probe suddenly increases greatly again, it is determined that the center position of the ultrasonic straight probe corresponds to the position of one side of the welded structure; when the flat plate and the welded structure are full-penetration connection, when the thickness detected by the ultrasonic straight probe suddenly decreases greatly, it is determined that the center position of the ultrasonic straight probe corresponds to the position of one side of the welded structure; thus, the positions of two sides of the welded structure are determined, without the need of opening holes, the operation is simple, and the detection is accurate. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of the temporary opening inspection method in the prior art;

[0024] Figure 2 is a schematic diagram of the case where the ultrasonic straight probe does not reach the welded structure area in the present application;

[0025] Figure 3 is a schematic diagram of the case where the ultrasonic straight probe reaches the edge of the outer leakage leg area of one side of the welded structure in the present application;

[0026] Figure 4 is a schematic diagram of the case where the ultrasonic straight probe reaches the edge of the fusion depth area of the fillet weld of the welded structure in the present application;

[0027] Figure 5 is a structural diagram of the first side mark point in the present application;

[0028] Figure 6is a schematic diagram of the ultrasonic straight probe of the present application reaching a non-penetration area of the welded structure;

[0029] Figure 7 is a schematic diagram of the ultrasonic straight probe of the present application reaching an edge of a fillet weld penetration area on the other side of the welded structure;

[0030] Figure 8 is a schematic diagram of the ultrasonic straight probe of the present application reaching a full penetration area on one side of the welded structure;

[0031] Figure 9 is a structural diagram of the second side marking point of the present application;

[0032] Figure 10 is a schematic diagram of the ultrasonic straight probe of the present application reaching an outer leakage lug area on the other side of the welded structure;

[0033] Figure 11 is a schematic diagram of the first side marking line and the second side marking line of the present application;

[0034] Figure 12 is a schematic diagram of the inspection line of the present application;

[0035] Figure 13 is a schematic diagram of the installation of the plate to be installed of the second embodiment of the present application;

[0036] In the figure, 1 is an ultrasonic straight probe; 2 is a flat plate; 21 is a first side marking point; 211 is a first side marking line; 212 is a first vertical line; 22 is a second side marking point; 221 is a second side marking line; 222 is a second vertical line; 23 is an inspection line; 3 is a welded structure; 4 is a plate to be installed. DETAILED DESCRIPTION

[0037] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0038] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like in the present application are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] As Figure 2- 12, embodiment one of the present application.

[0040] A method for detecting the position of the filled welding structure 3 by ultrasonic waves, comprising the following steps:

[0041] S1: Place the ultrasonic straight probe 1 on the plane plate 2, and ensure that the ultrasonic straight probe 1 is located on one side of the filled welding structure 3, at this time, the thickness detected by the ultrasonic straight probe 1 is the thickness of the plane plate 2; Specifically, place the ultrasonic straight probe 1 on one side of the filled welding structure 3 at a certain distance (judged according to the drawing information and the on-site situation), when the ultrasonic waves emitted by the ultrasonic straight probe 1 vertically pass through the plane plate 2 from one side to the other side, the other side of the plane plate 2 will almost vertically reflect all the ultrasonic waves, at this time, the display screen of the ultrasonic plate thickness detector receives strong reflected wave signals and displays the plate thickness (i.e. the thickness of the plane plate 2), the position diagram of the ultrasonic straight probe 1 is shown in Figure 2 .

[0042] S2: Move the ultrasonic straight probe 1 along the length direction of the plane plate 2 to approach the filled welding structure 3, when the thickness detected by the ultrasonic straight probe 1 begins to increase, at this time, the center position of the ultrasonic straight probe 1 corresponds to the edge position of the outer leakage fillet area on one side of the filled welding structure 3; Specifically, gradually move the ultrasonic straight probe 1 to the position of the filled welding structure 3, when it reaches the edge of the outer leakage fillet area on one side of the filled welding structure 3 (far away from the edge of the filled welding structure 3), the ultrasonic waves emitted by the ultrasonic straight probe 1 begin to be reflected by the surface of the fillet weld gradually, since the surface of the fillet weld is in an inclined state, and as the probe gradually approaches the filled welding structure 3 (equivalent to increasing the thickness of the plane plate 2), most of the reflected ultrasonic waves cannot be reflected back to the ultrasonic straight probe 1, at this time, the reflected wave signals received on the display screen of the ultrasonic plate thickness detector are weaker and weaker, and the detected thickness is larger and larger, the position diagram of the ultrasonic straight probe 1 reaching the outer leakage fillet area of the filled welding structure 3 is shown in Figure 3 .

[0043] S3: the ultrasonic straight probe 1 continues to move in the original direction (moves gradually close to the welded structure 3 along the length direction of the flat plate 2), when the thickness detected by the ultrasonic straight probe 1 suddenly increases greatly, at this time, the center position of the ultrasonic straight probe 1 corresponds to the edge position of the fillet weld penetration area of the welded structure 3, mark the center position of the ultrasonic straight probe 1 on the flat plate 2 as a first side mark point 21; specifically: continue to move the ultrasonic straight probe 1 to the position of the welded structure 3, when it reaches the edge of the fillet weld penetration area on one side of the welded structure 3, the ultrasonic wave emitted by the ultrasonic straight probe 1 extends through the flat plate 2, the fillet weld penetration area, the welded structure 3 and reaches the end of the welded structure 3, which is equivalent to that the thickness of the flat plate 2 suddenly increases sharply, resulting in that the ultrasonic wave emitted by the ultrasonic straight probe 1 is almost completely consumed (absorbed by the welded structure), the reflection wave signal detected by the ultrasonic thickness detector almost disappears, the detected thickness suddenly increases greatly, at this time, mark the center position of the ultrasonic straight probe 1 (on the surface of the flat plate 2) as the first side mark point 21 (see Figure 4 and Figure 5 ).

[0044] S4: when the flat plate 2 and the welded structure 3 are non-penetration welded, continue to move the ultrasonic straight probe 1 in the original direction, at this time, the thickness detected by the ultrasonic straight probe 1 becomes the thickness of the flat plate 2, the ultrasonic straight probe 1 keeps moving, when the thickness detected by the ultrasonic straight probe 1 suddenly increases again, at this time, the center position of the ultrasonic straight probe 1 corresponds to the edge position of the fillet weld penetration area on the other side of the welded structure 3, mark the center position of the ultrasonic straight probe 1 on the flat plate 2 as a second side mark point 22; specifically: continue to move the ultrasonic straight probe 1 to the other side of the welded structure 3, when it reaches the non-penetration area of the welded structure 3 (i.e. there is a gap between the flat plate 2 and the welded structure 3), when the ultrasonic wave emitted by the ultrasonic straight probe 1 reaches the other side of the flat plate 2, the other side of the flat plate 2 will almost vertically reflect all the ultrasonic waves, at this time, the display screen of the ultrasonic thickness detector receives strong reflection wave signals and displays the thickness (i.e. the thickness of the flat plate 2), see Figure 6 for the schematic diagram of the ultrasonic straight probe 1 reaching the non-penetration area of the welded structure 3; continue to move the ultrasonic straight probe 1, when it reaches the edge of the fillet weld penetration area on the other side of the welded structure 3 (close to the edge of the welded structure 3) (see Figure 7As shown, the ultrasonic waves emitted by the ultrasonic straight probe 1 pass through the flat plate 2, the weld penetration area, and the welded structure 3, extending all the way to the end of the welded structure 3. This is equivalent to a sudden and drastic increase in the thickness of the flat plate 2, causing the ultrasonic signal emitted by the ultrasonic straight probe 1 to be almost completely consumed. The ultrasonic plate thickness detector receives almost no reflected wave signal, and the plate thickness display suddenly increases significantly. At this time, a second side marker point 22 is drawn at the center position of the ultrasonic straight probe 1 (on the surface of the flat plate 2). See [reference needed]. Figure 9 .

[0045] When the flat plate 2 and the welded structure 3 are fully penetrated, continue moving the ultrasonic straight probe 1 in the original direction. When the ultrasonic straight probe 1 reaches one edge of the fully penetrated area of ​​the welded structure 3, refer to... Figure 8 The ultrasonic waves emitted by the ultrasonic straight probe 1 extend through the flat plate 2, the full-penetration weld area, and the welded structure 3 to the end of the welded structure 3. Therefore, the thickness detected by the ultrasonic straight probe 1 remains unchanged (consistent with the thickness detected when the ultrasonic straight probe 1 reaches the edge of the fillet weld penetration area on one side of the welded structure 3). The ultrasonic straight probe 1 continues to move. When the thickness detected by the ultrasonic straight probe 1 suddenly decreases significantly, the ultrasonic straight probe 1 reaches the other edge of the full-penetration weld area of ​​the welded structure 3. This also indicates that the center position of the ultrasonic straight probe 1 corresponds to the edge of the exposed weld area on the other side of the welded structure 3 (near the edge of the welded structure 3). The center position of the ultrasonic straight probe 1 is marked on the flat plate 2 as the second side mark point 22. See [link to documentation]. Figure 9 .

[0046] S5: Repeat S1-S4 to mark another first side marker 21 and another second side marker 22 on the flat plate 2. Connect the two first side markers 21 to form a first side marker line 211, and connect the two second side markers 22 to form a second side marker line 221. The first side marker line 211 is the edge line of one side of the welded structure 3, and the second side marker line 221 is the edge line of the other side of the welded structure 3, thus determining the position of the welded structure 3. When one side of the plate 4 to be installed needs to be aligned with one side of the welded structure 3, simply align one side of the plate 4 to be installed with the first side marker line 211 or the second side marker line 221 to complete the positioning of the plate 4 to be installed. See [link to documentation]. Figure 11 .

[0047] The embodiment detects the thickness by the ultrasonic straight probe 1 to determine the position of the installed welding structure 3. When the thickness detected by the ultrasonic straight probe 1 suddenly increases greatly, it is determined that the center position of the ultrasonic straight probe 1 corresponds to the position of one side of the installed welding structure 3. When the flat plate 2 and the installed welding structure 3 are non-penetration welding connection, the thickness detected by the ultrasonic straight probe 1 suddenly increases greatly again, it is determined that the center position of the ultrasonic straight probe 1 corresponds to the position of one side of the installed welding structure 3. When the flat plate 2 and the installed welding structure 3 are full penetration welding connection, the thickness detected by the ultrasonic straight probe 1 suddenly decreases greatly, it is determined that the center position of the ultrasonic straight probe 1 corresponds to the position of one side of the installed welding structure 3. Thus, the positions of two sides of the installed welding structure 3 are determined, without the need to open holes, the operation is simple, and the detection is accurate.

[0048] Exemplarily, the first vertical line 212 and the second vertical line 222 are drawn on the flat plate 2. The first vertical line 212 is perpendicular to the first side marking line 211, one end of the first vertical line 212 is connected with the first side marking line 211, and the other end of the first vertical line 212 is connected with the second side marking line 221. The second vertical line 222 is perpendicular to the second side marking line 221, one end of the second vertical line 222 is connected with the first side marking line 211, and the other end of the second vertical line 222 is connected with the second side marking line 221. Then, the perpendicular bisector of the first vertical line 212 and the perpendicular bisector of the second vertical line 222 are drawn. Generally, the two sides of the installed welding structure 3 are parallel, that is, the first side marking line 211 and the second side marking line 221 are parallel. Therefore, the perpendicular bisector of the first vertical line 212 and the perpendicular bisector of the second vertical line 222 should theoretically coincide (within the allowable error range). If the two do not coincide in actual operation, it means that the detection is not accurate and needs to be re-detected. The perpendicular bisector of the first vertical line 212 and the perpendicular bisector of the second vertical line 222 drawn are the center line of the installed welding structure 3. When the center line of the to-be-installed plate 4 needs to be aligned with the center line of the installed welding structure 3, the center line of the to-be-installed plate 4 is drawn, and then the center line of the to-be-installed plate 4 is aligned with the perpendicular bisector of the first vertical line 212 or the perpendicular bisector of the second vertical line 222, see Figure 11 .

[0049] Exemplarily, the test line 23 parallel to the perpendicular bisector of the first vertical line 212 is drawn on the flat plate 2, and multiple punch points are punched along the test line 23. When the test line 23 is accidentally damaged, the punch points can be used to restore it. After the to-be-installed plate 4 is welded with the flat plate 2, the distance between the test line 23 and the to-be-installed plate 4 can be measured to determine whether the installation is in place. Generally, the test line 23 and the perpendicular bisector of the first vertical line 212 have a certain interval to ensure that there is a certain interval between the test line 23 and the to-be-installed plate 4, see Figure 12 .

[0050] For example, after S4, the ultrasonic straight probe 1 continues to move in the original direction, and it is confirmed whether the thickness detected by the ultrasonic straight probe 1 gradually decreases and finally reaches the thickness of the flat plate 2, so as to determine whether the detection is operated normally; specifically, the ultrasonic straight probe 1 continues to move to the other side of the assembled welding structure 3, when it reaches the outer leakage welding leg area of the other side of the assembled welding structure 3, the ultrasonic wave emitted by the ultrasonic straight probe 1 begins to be reflected by the surface of the fillet weld gradually, since the surface of the fillet weld is in an inclined state, and as the probe gradually moves away from the assembled welding structure 3 (equivalent to reducing the detection thickness until the original thickness of the flat plate 2 is reached), most of the reflected ultrasonic waves cannot be reflected back to the ultrasonic straight probe 1, at this time, the reflected wave signal received on the display screen of the ultrasonic plate thickness detector changes from weak to strong, and the plate thickness size becomes smaller and smaller until the original thickness of the flat plate 2 is reached, see Figure 10 Therefore, if the detected thickness does not change as described above, there may be an operation error during the detection.

[0051] As shown in FIG. 2, an embodiment of the present application is shown. Figure 13 As shown in FIG. 2, an embodiment of the present application is shown.

[0052] A method for detecting the position of the assembled welding structure 3, comprising the following steps:

[0053] S1: The ultrasonic straight probe 1 is arranged on the flat plate 2, and it is ensured that the ultrasonic straight probe 1 is located on one side of the assembled welding structure 3, at this time, the thickness detected by the ultrasonic straight probe 1 is the thickness of the flat plate 2;

[0054] S2: The ultrasonic straight probe 1 is moved along the length direction of the flat plate 2 to approach the assembled welding structure 3, when the thickness detected by the ultrasonic straight probe 1 begins to increase, at this time, the center position of the ultrasonic straight probe 1 corresponds to the edge position of the outer leakage welding leg area of the assembled welding structure 3;

[0055] S3: The ultrasonic straight probe 1 continues to move in the original direction, when the thickness detected by the ultrasonic straight probe 1 suddenly increases greatly, at this time, the center position of the ultrasonic straight probe 1 corresponds to the edge position of one side of the fillet weld penetration area of the assembled welding structure 3, and the center position of the ultrasonic straight probe 1 on the flat plate 2 is marked as a first side mark point 21;

[0056] S4: The operations of S1-S3 are repeated, another first side mark point 21 is marked on the flat plate 2, and then the two first side mark points 21 are connected to form a first side mark line 211.

[0057] The embodiment is suitable for the case that one side of the to-be-installed plate 4 needs to be aligned with one side of the assembled welding structure 3, at this time, only the position of one side of the assembled welding structure 3 needs to be detected, without the need to respectively detect the positions of the two sides of the assembled welding structure 3, thereby saving steps and helping to improve the construction efficiency.

[0058] After S3, the ultrasonic straight probe 1 is moved in the original direction continuously, and it is confirmed whether the number of the back detected by the ultrasonic straight probe 1 is gradually reduced and finally the thickness of the flat panel 2.

[0059] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should be considered as the protection scope of the present application.

Claims

1. A method of ultrasonically detecting the location of a filled weld, comprising: The method comprises the following steps: S1: placing an ultrasonic straight probe on a flat plate and ensuring that the ultrasonic straight probe is located on one side of a structure to be welded, at this time, the thickness detected by the ultrasonic straight probe is the thickness of the flat plate; S2: moving the ultrasonic straight probe along the length direction of the flat plate to approach the structure to be welded, when the thickness detected by the ultrasonic straight probe starts to increase, at this time, the center position of the ultrasonic straight probe corresponds to the edge position of the outer leakage fillet area of one side of the structure to be welded; S3: continuing to move the ultrasonic straight probe in the original direction, when the thickness detected by the ultrasonic straight probe suddenly and greatly increases, at this time, the center position of the ultrasonic straight probe corresponds to the edge position of the corner weld penetration area of the structure to be welded, marking the center position of the ultrasonic straight probe on the flat plate as a first side mark point; S4: when the flat plate and the structure to be welded are non-penetration connection, continuing to move the ultrasonic straight probe in the original direction, at this time, the thickness detected by the ultrasonic straight probe becomes the thickness of the flat plate, the ultrasonic straight probe keeps moving, when the thickness detected by the ultrasonic straight probe again suddenly and greatly increases, at this time, the center position of the ultrasonic straight probe corresponds to the edge position of the corner weld penetration area of the other side of the structure to be welded, marking the center position of the ultrasonic straight probe on the flat plate as a second side mark point; When the flat plate and the structure to be welded are full-penetration connection, continuing to move the ultrasonic straight probe in the original direction, at this time, the thickness detected by the ultrasonic straight probe keeps unchanged, the ultrasonic straight probe keeps moving, when the thickness detected by the ultrasonic straight probe suddenly and greatly decreases, at this time, the center position of the ultrasonic straight probe corresponds to the edge position of the corner weld penetration area of the other side of the structure to be welded, marking the center position of the ultrasonic straight probe on the flat plate as a second side mark point; S5: repeating S1-S4, marking another first side mark point and another second side mark point on the flat plate, connecting two first side mark points to form a first side mark line, and connecting two second side mark points to form a second side mark line.

2. The method of claim 1, wherein: Drawing a first vertical line and a second vertical line on the flat plate, the first vertical line is perpendicular to the first side mark line, one end of the first vertical line is connected with the first side mark line, the other end of the first vertical line is connected with the second side mark line, the second vertical line is perpendicular to the second side mark line, one end of the second vertical line is connected with the first side mark line, the other end of the second vertical line is connected with the second side mark line, then drawing a perpendicular bisector of the first vertical line and a perpendicular bisector of the second vertical line respectively.

3. The method of claim 2 wherein: Drawing an inspection line parallel to the perpendicular bisector of the first vertical line on the flat plate, and punching multiple dot punch points along the inspection line.

4. The method of claim 1, wherein: After S4, continuing to move the ultrasonic straight probe in the original direction, confirming whether the thickness detected by the ultrasonic straight probe gradually decreases and finally becomes the thickness of the flat plate.

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