A high-precision weld defect detection device

Abstract

The present invention relates to a high-precision weld defect detection device, comprising an ultrasonic detection component, a fixed frame, and a screw drive component, a rolling component and a scale component on the fixed frame, wherein the ultrasonic detection component comprises two groups of symmetrically arranged ultrasonic detection units, each group of ultrasonic detection units comprises a clamping block and an ultrasonic probe, and the ultrasonic probe is arranged on the clamping block, the screw drive component comprises two groups of symmetrically arranged screw drive units, the scale component comprises two groups of symmetrically arranged scale units, the two groups of ultrasonic detection units are respectively movably arranged on the two groups of screw drive units and are respectively connected to the two groups of scale units, and the rolling component comprises two groups of symmetrically arranged rolling units, each group of rolling units comprises a roller arranged on the fixed frame, and the lowest point of the roller is located on the same plane as the lower end surface of the clamping block. Compared with the prior art, the present invention can perform precise detection on weld workpieces except for flat-plate butt welds and welds with a certain inclination angle, has a simple structure, is light in weight, and is easy to carry.

Description

Technical Field

[0001] The invention relates to the field of ultrasonic nondestructive testing, and in particular to a high-precision weld defect detection device. Background Art

[0002] The principle of ultrasonic diffraction time-of-flight technique (TOFD) is based on classical acoustic theory, that is, the depth and height of the defect are measured by using the arrival time of the diffracted wave formed when the defect tip encounters the incident sound wave. During the detection process, two longitudinal wave oblique ultrasonic probes are placed opposite to each other, one transmitting and the other receiving. The characteristic waveforms received by the ultrasonic probes include lateral waves, defect diffraction waves and bottom waves. The time difference of the above characteristic waveforms can be calculated to determine the depth and size of the defect. Welding is a method of joining two independent workpieces to form a durable integral component by high-temperature heating or high-pressure. As an important material processing technology, welding is widely used in modern manufacturing. However, due to the limitations of the welding process itself, various defects may occur in the weld. In order to ensure the safety of welded structures, non-destructive testing of welds is necessary. Due to the advantages of ultrasonic diffraction time-of-flight technique for weld detection, such as high reliability, high detection efficiency, high detection accuracy (the length quantitative error of defects such as cracks is less than 1 mm) and real-time imaging, it has been widely used in the detection of weld components.

[0003] However, existing weld detection devices usually have the following two problems:

[0004] The relative position between the ultrasonic probe and the workpiece cannot remain stable, especially for welds with a certain inclination (such as Fig.10 The connection between the rail bottom 16 and the rail waist 15 is an inclined surface, so there is an inclination angle in the weld between the two sections of rails), which is more obvious, resulting in poor coupling between the probe and the workpiece, reduced sound wave intensity and unstable signals. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a high-precision weld defect detection device, which can perform precise detection on flat-plate butt welds and weld workpieces with a certain inclination angle. It has a simple structure, is light in weight, and is easy to carry.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A high-precision weld defect detection device, comprising an ultrasonic detection component, a fixed frame, and a screw drive component, a rolling component and a ruler component on the fixed frame, wherein the ultrasonic detection component comprises two groups of symmetrically arranged ultrasonic detection units, each group of ultrasonic detection units comprises a clamping block and an ultrasonic probe, and the ultrasonic probe is arranged on the clamping block, the screw drive component comprises two groups of symmetrically arranged screw drive units, the ruler component comprises two groups of symmetrically arranged ruler units, the two groups of ultrasonic detection units are respectively movably arranged on the two groups of screw drive units and are respectively connected to the two groups of ruler units, the rolling component comprises two groups of symmetrically arranged rolling units, each group of rolling units comprises a roller arranged on the fixed frame, and the lowest point of the roller is located on the same plane as the lower end surface of the clamping block;

[0008] The distance between the ultrasonic probes of the two groups of ultrasonic detection units is adjusted by the screw transmission unit. When the weld defect detection is performed on the inspected workpiece, the roller is attached to the inspected workpiece. Since the lowest point of the roller and the lower end surface of the clamp are located on the same plane, the clamp is tightly attached to the inspected workpiece with a certain coupling pressure, thereby avoiding poor coupling between the clamp and the workpiece, which leads to reduced sound wave intensity and unstable signals. The invention is suitable for various welds and connecting joints, and is suitable for the detection of flat-plate key components with high requirements on joint quality.

[0009] Furthermore, the fixed frame includes two end plates, two side plates, two positioning sockets and an insert plate. The two end plates are arranged in parallel, the two side plates are arranged in parallel between the two end plates, the two positioning sockets are respectively arranged at corresponding positions of the two side plates, the positioning sockets are provided with slots, and the insert plate is inserted into the slots of the two positioning sockets, one of the screw transmission units is arranged between the insert plate and one of the end plates, and the other screw transmission unit is arranged between the insert plate and the other end plate, which is easy to disassemble and assemble.

[0010] Furthermore, the screw transmission unit includes a transmission screw and a nut and a transmission block sleeved on the transmission screw.

[0011] Furthermore, one end of the transmission screw is fixed on the plug plate, and the other end passes through the end plate and is connected with a coupling, and the nut is fixedly connected to the transmission block.

[0012] Furthermore, the transmission block is connected to the ultrasonic detection unit via a first connecting plate.

[0013] Furthermore, the ruler unit includes a ruler and a display screen for displaying scale values, and the display screen is slidably arranged on the ruler.

[0014] Furthermore, the display screen is connected to the clamping block via a second connecting plate;

[0015] The transmission screw is driven to rotate by rotating the coupling. Since the nut is fixedly connected to the transmission block, and the transmission block is fixed to the first connecting plate, the nut cannot rotate with the transmission screw, but rotates relative to the transmission screw. At this time, the nut moves along the axial direction of the transmission screw, and indirectly drives the clamping block to move through the transmission block and the first connecting plate. The clamping block drives the display screen to move on the scale through the second connecting plate, and the scale value is displayed on the display screen, thereby realizing precise control of the ultrasonic probe with high precision and easy operation.

[0016] Furthermore, the rolling unit also includes a fixing plate and a fixing plug, the fixing plate is provided with an insert sleeve, the roller is sleeved on the insert sleeve, the fixing plug is inserted into the insert sleeve, and the roller is clamped between the fixing plug and the fixing plate, which is easy to disassemble and assemble.

[0017] Furthermore, the material of the roller is a magnet, and the roller can be automatically attached to the workpiece to be measured without manual pressing, thereby ensuring the stability of the detection process and easy operation.

[0018] Furthermore, the clamping block includes a fixed block and a wedge block on the fixed block, and the ultrasonic probe is arranged on the wedge block so that the ultrasonic probe is arranged tilted relative to the wedge block.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention adjusts the distance between the ultrasonic probes of the two groups of ultrasonic detection units through the screw transmission unit. When the weld defect detection is performed on the workpiece to be inspected, the roller is attached to the workpiece to be inspected. Since the lowest point of the roller and the lower end surface of the clamp block are located on the same plane, the clamp block is tightly attached to the workpiece to be inspected with a certain coupling pressure, and the roller can slide along the surface of the workpiece to be inspected. Therefore, whether it is applied to a flat-type workpiece to be inspected or a workpiece to be inspected with a certain inclination angle on the surface, the detection device can ensure that its relative position with the workpiece to be inspected remains stable, avoiding poor coupling between the clamp block and the workpiece, resulting in reduced sound wave intensity and unstable signals. The detection device is suitable for various welds and connecting joints, and is suitable for the detection of flat-type key components with high joint quality requirements. The detection device has a simple structure, is light in weight, and is easy to carry;

[0021] (2) The present invention drives the transmission screw to rotate through a rotating coupling. Since the nut is fixedly connected to the transmission block, and the transmission block is fixed to the first connecting plate, the nut cannot rotate along with the transmission screw, but rotates relative to the transmission screw. At this time, the nut moves along the axial direction of the transmission screw, and indirectly drives the clamping block to move through the transmission block and the first connecting plate. The clamping block drives the display screen to move on the scale through the second connecting plate, and the scale value is displayed on the display screen, thereby realizing precise control of the ultrasonic probe, with high precision and easy operation;

[0022] (3) The material of the roller of the present invention is magnet, and the roller can be automatically attached to the workpiece to be tested without manual pressing, thereby ensuring the stability of the testing process and being easy to operate;

[0023] (4) The fixed frame of the present invention comprises two end plates, two side plates, two positioning clamps and an inserting plate. The two end plates are arranged in parallel, the two side plates are arranged in parallel between the two end plates, the two positioning clamps are arranged at corresponding positions of the two side plates, the positioning clamps are provided with slots, the inserting plate is inserted into the slots of the two positioning clamps, one of the screw transmission units is arranged between the inserting plate and one of the end plates, and the other screw transmission unit is arranged between the inserting plate and the other end plate, so that the assembly and disassembly are simple.

[0024] (5) The rolling unit of the present invention further comprises a fixing plate and a fixing plug. The fixing plate is provided with an inserting sleeve. The roller is sleeved on the inserting sleeve. The fixing plug is inserted into the inserting sleeve. The roller is clamped between the fixing plug and the fixing plate, and the assembly and disassembly is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the upper three-dimensional structure of the present invention;

[0026] Figure 2 The bottom three-dimensional structure schematic diagram of the present invention

[0027] Figure 3 It is a front view of the present invention;

[0028] Figure 4 is a schematic diagram of the three-dimensional structure of the fixed frame;

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure of the positioning card seat;

[0030] Figure 6 is a schematic diagram of the three-dimensional structure of the rolling unit;

[0031] Figure 7 It is a schematic diagram of the assembly structure of the first connecting plate, the second connecting plate and the ultrasonic detection component;

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the ultrasonic detection component;

[0033] Fig. 9 It is a three-dimensional structural schematic diagram of the screw transmission unit;

[0034] Fig.10 is a schematic diagram of the three-dimensional structure of the rail;

[0035] Description of the numbers in the figure:

[0036] 1. Fixed frame, 2. Screw transmission assembly, 3. Rolling assembly, 4. Coupling, 5. Ruler assembly, 6. Ultrasonic detection assembly, 7. Bracket, 8. First connecting plate, 9. Second connecting plate, 11. End plate, 12. Side plate, 13. Positioning card seat, 14. Insert plate, 15. Rail waist, 16. Rail bottom, 21. Transmission screw, 22. Nut, 23. Transmission block, 31. Fixed plate, 32. Insert cylinder, 33. Roller, 34. Fixed plug, 51. Ruler, 52. Display screen, 61. Fixed block, 62. Wedge block, 63. Ultrasonic probe, 131. Slot. DETAILED DESCRIPTION

[0037] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0038] A high-precision weld defect detection device, such as Figure 1 , Figure 2 and Figure 3 , including an ultrasonic detection component 6, a fixed frame 1, and a screw transmission component 2, a rolling component 3 and a scale component 5 on the fixed frame 1, the ultrasonic detection component 6 includes two groups of symmetrically arranged ultrasonic detection units, each group of ultrasonic detection units includes a clamping block and an ultrasonic probe 63, and the ultrasonic probe 63 is arranged on the clamping block, the screw transmission component 2 includes two groups of symmetrically arranged screw transmission units, and the scale component 5 includes two groups of symmetrically arranged scale units. The two groups of ultrasonic detection units are movably arranged on the two groups of screw transmission units and are respectively connected to the two groups of scale units. The rolling component 3 includes two groups of symmetrically arranged rolling units, each group of rolling units includes a roller 33 arranged on the fixed frame 1, and the lowest point of the roller 33 is located on the same plane as the lower end surface of the clamping block;

[0039] The distance between the ultrasonic probes 63 of the two groups of ultrasonic detection units is adjusted by the screw transmission unit. When the weld defect detection is performed on the inspected workpiece, the roller 33 is attached to the inspected workpiece. Since the lowest point of the roller 33 and the lower end surface of the clamp are located on the same plane, the clamp is tightly attached to the inspected workpiece with a certain coupling pressure, avoiding poor coupling between the clamp and the workpiece resulting in reduced sound wave intensity and unstable signals. The invention is suitable for various welds and connecting joints, and is suitable for the detection of flat-plate key components with high requirements on joint quality.

[0040] like Figure 8 The clamping block includes a fixed block 61 and a wedge block 62 on the fixed block 61 , and the ultrasonic probe 63 is arranged on the wedge block 62 , so that the ultrasonic probe 63 is inclined relative to the wedge block 62 .

[0041] like Figure 4The fixed frame 1 includes two end plates 11, two side plates 12, two positioning seats 13 and an insert plate 14. The two end plates 11 are arranged in parallel, and the two side plates 12 are arranged in parallel between the two end plates 11. The side plates 12 are rectangular, and the two positioning seats 13 are respectively arranged at corresponding positions of the two side plates 12. Figure 5 A slot 131 is provided on the positioning card seat 13, and the plug board 14 is inserted into the slots 131 of the two positioning card seats 13. One of the screw transmission units is arranged between the plug board 14 and one of the end plates 11, and the other screw transmission unit is arranged between the plug board 14 and the other end plate 11, which is easy to disassemble and assemble.

[0042] like Fig. 9 The screw transmission unit includes a transmission screw 21 and a nut 22 and a transmission block 23 which are sleeved on the transmission screw 21 .

[0043] like Figure 7 , one end of the transmission screw 21 is fixed on the plug plate 14, and the other end passes through the end plate 11 and is connected to the coupling 4, the nut 22 is fixedly connected to the transmission block 23, the transmission block 23 is connected to the fixed block 61 through the first connecting plate 8, the scale unit includes a scale 51 and a display screen 52 for displaying the scale value, the display screen 52 is slidably arranged on the scale 51, and the display screen 52 is connected to the fixed block 61 through the second connecting plate 9;

[0044] The transmission screw 21 is driven to rotate by rotating the coupling 4. Since the nut 22 is fixedly connected to the transmission block 23, and the transmission block 23 is fixed to the first connecting plate 8, the nut 22 cannot rotate with the transmission screw 21, but rotates relative to the transmission screw 21. At this time, the nut 22 moves along the axial direction of the transmission screw 21, and indirectly drives the clamping block to move along the length direction of the side plate 12 through the transmission block 23 and the first connecting plate 8. The clamping block drives the display screen 52 to move on the ruler 51 through the second connecting plate 9, and the scale value is displayed on the display screen 52, so as to accurately adjust the distance between the two ultrasonic probes 63 with high precision and easy operation.

[0045] like Figure 6 The rolling unit also includes a fixing plate 31 and a fixing plug 34 . The fixing plate 31 is provided with an insert sleeve 32 . The roller 33 is sleeved on the insert sleeve 32 . The fixing plug 34 is inserted into the insert sleeve 32 . The roller 33 is clamped between the fixing plug 34 and the fixing plate 31 .

[0046] The material of the roller 33 is a magnet, and the roller 33 can be automatically attached to the workpiece to be measured without manual pressing, thereby ensuring the stability of the detection process and easy operation.

[0047] This embodiment proposes a high-precision weld defect detection device, which can realize ultrasonic TOFD precision detection of welds. In addition to precise detection of flat-plate butt welds, it can also perform precise detection of weld workpieces with a certain inclination angle. It can meet the needs of ultrasonic TOFD to detect defects of different types, sizes, positions and orientations in welds, and is particularly suitable for the detection of flat-plate key components with high requirements on joint quality. At the same time, the device has a simple structure, is lightweight, and is easy to carry.

[0048] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A high-precision weld defect detection device, characterized in that: The invention comprises an ultrasonic detection component (6), a fixed frame (1), and a screw drive component (2), a rolling component (3) and a scale component (5) on the fixed frame (1); the fixed frame (1) comprises two end plates (11), two side plates (12), two positioning card seats (13) and an insert plate (14); the two end plates (11) are arranged in parallel; the two side plates (12) are arranged in parallel between the two end plates (11); the two positioning card seats (13) are arranged at corresponding positions of the two side plates (12) respectively; the positioning card seats (13) are provided with slots (131); the insert plate (14) is inserted into the slots (131) of the two positioning card seats (13); and one screw drive unit is arranged between the insert plate (14) and one of the end plates (11). Another screw transmission unit is arranged between the plug plate (14) and the other end plate (11); the ultrasonic detection assembly (6) comprises two groups of symmetrically arranged ultrasonic detection units, each group of ultrasonic detection units comprises a clamping block and an ultrasonic probe (63), and the ultrasonic probe (63) is arranged on the clamping block; the screw transmission assembly (2) comprises two groups of symmetrically arranged screw transmission units; the scale assembly (5) comprises two groups of symmetrically arranged scale units, the two groups of ultrasonic detection units are respectively movably arranged on the two groups of screw transmission units and are respectively connected to the two groups of scale units; the rolling assembly (3) comprises two groups of symmetrically arranged rolling units, each group of rolling units comprises a roller (33) arranged on the fixed frame (1), and the lowest point of the roller (33) is located on the same plane as the lower end surface of the clamping block; The clamping block comprises a fixing plate (31) and a fixing plug (34); the fixing plate (31) is provided with an inserting sleeve (32); the roller (33) is sleeved on the inserting sleeve (32); the fixing plug (34) is inserted into the inserting sleeve (32); and the roller (33) is clamped between the fixing plug (34) and the fixing plate (31).

2. A high-precision weld defect detection device according to claim 1, characterized in that: The screw transmission unit comprises a transmission screw (21), a nut (22) sleeved on the transmission screw (21), and a transmission block (23).

3. A high-precision weld defect detection device according to claim 2, characterized in that: One end of the transmission screw rod (21) is fixed on the plug plate (14), and the other end passes through the end plate (11) and is connected to the coupling (4). The nut (22) is fixedly connected to the transmission block (23).

4. A high-precision weld defect detection device according to claim 2, characterized in that: The transmission block (23) is connected to the ultrasonic detection unit via a first connecting plate (8).

5. The high-precision weld defect detection device according to claim 1, characterized in that: The scale unit comprises a scale (51) and a display screen (52) for displaying scale values, and the display screen (52) is slidably arranged on the scale (51).

6. A high-precision weld defect detection device according to claim 5, characterized in that: The display screen (52) is connected to the clamping block via a second connecting plate (9).

7. A high-precision weld defect detection device according to claim 1, characterized in that: The material of the roller (33) is a magnet.

8. A high-precision weld defect detection device according to claim 1, characterized in that: The ultrasonic detection unit further comprises a fixed block (61) and a wedge block (62) on the fixed block (61), and the ultrasonic probe (63) is arranged on the wedge block (62).

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