Laser ultrasonic nondestructive detector for metal welding residual stress

Abstract

The utility model discloses a laser ultrasonic nondestructive detector for metal welding residual stress, which relates to the technical field of residual stress detection equipment and comprises a box body, a mounting groove is formed in the box body, and a plurality of first rotating shafts are rotatably connected in the mounting groove. The spring winding device has the advantages that the rotating roller and the first rotating shaft are driven to rotate when the two ends of a connecting wire are pulled, so that a spring is wound, meanwhile, through mutual cooperation of the first rotating shaft, a ratchet wheel, a second rotating shaft and a pawl, the connecting wire is wound, and the connecting wire is wound. After use, a push plate is pushed to slide towards the interior of a push groove, then a push rod and a second connecting plate are pushed, and then a first connecting plate and a second rotating shaft are driven to rotate, so that a pawl is driven to rotate, limiting of the pawl to a ratchet wheel is relieved, and the spring rebounds; and therefore, the first rotating shaft and the rotating roller can be driven to wind the connecting wire.

Description

Technical Field

[0001] This utility model relates to the technical field of residual stress detection equipment, specifically a laser ultrasonic non-destructive testing device for residual stress in metal welding. Background Technology

[0002] Residual stress measurement methods can be divided into two main categories: destructive testing and non-destructive testing. Destructive testing methods are stress release methods, also known as mechanical methods, with drilling being a commonly used method. Non-destructive methods are physical methods, such as X-ray diffraction, neutron diffraction, magnetic methods, and ultrasonic methods. Among these, laser ultrasonic testing systems are physical performance testing instruments used in basic sciences of physics, engineering and technology, materials science, and electronics and communication technologies. Laser ultrasonic technology uses an extremely small laser source to excite and receive ultrasound, solving the technical difficulties of traditional methods and achieving true localized stress detection.

[0003] Chinese patent application number 202323076352.9 discloses a portable residual stress detector, including a carrying case. The top of the carrying case is rotatably equipped with a lid, and a pull rod is fixedly installed on the side of the carrying case. The carrying case has a detection mechanism inside, a straight groove is opened at the bottom of the inside of the carrying case, and side grooves are spaced apart at the side ends of the straight groove. A clamping mechanism is provided inside the straight groove. Several upright plates are fixedly connected to the bottom of the inside of the carrying case. Each upright plate has a winding mechanism at its side end. The winding mechanism includes a rotating component, and a toggle component is provided at the side end of the rotating component.

[0004] After use, the portable residual stress detector requires the connecting wires to be wound up one by one. The user needs to manually rotate each wheel in sequence to wind up the connecting wires, which is inconvenient and reduces its practicality. To address this, we propose a laser ultrasonic non-destructive testing device for residual stress in metal welding. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a laser ultrasonic non-destructive testing device for residual stress in metal welding, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a laser ultrasonic non-destructive testing device for residual stress in metal welding, comprising a housing, an installation groove inside the housing, a plurality of first rotating shafts rotatably connected inside the installation groove, a rotating rod fixedly connected to the outside of the first rotating shaft and inside the installation groove, a plurality of second internal grooves inside the housing, a plurality of first internal grooves inside the housing, one end of the first rotating shaft passing through the first internal groove and the second internal groove, a spring disposed outside the first rotating shaft and inside the first internal groove, one end of the spring fixedly connected to the inner wall of the first internal groove, the other end of the spring fixedly connected to the outside of the first rotating shaft, and a limit mechanism disposed outside the first rotating shaft and inside the second internal groove.

[0007] Preferably, the limiting mechanism includes a ratchet, which is fixedly connected to the outside of the first rotating shaft and located inside the second internal groove. The second rotating shaft is rotatably connected inside the second internal groove. A pawl is fixedly connected to the outside of the second rotating shaft and located inside the second internal groove. The ratchet and the pawl cooperate with each other. Through the cooperation of the first rotating shaft, the ratchet, the second rotating shaft, and the pawl, the first rotating shaft and the mainspring can be limited to prevent the mainspring from rebounding during the detection process and driving the first rotating shaft and the rotating roller to wind up the connecting wire.

[0008] Preferably, the housing has multiple third internal slots inside, one end of the second rotating shaft extends into the interior of the third internal slot, and a first connecting plate is fixedly connected to the outside of the second rotating shaft and inside the third internal slot. A T-slot is formed inside the housing and on one side of the three third internal slots. A push rod is slidably connected inside the T-slot, and three second connecting plates are fixedly connected to the bottom of the push rod. The second connecting plates cooperate with the first connecting plates. Through the cooperation of the push rod, the second connecting plates and the first connecting plates, the second rotating shaft and the pawl can be driven to rotate, thereby releasing the ratchet from its limit.

[0009] Preferably, the interior of the housing has multiple fourth internal slots, one end of the second rotating shaft extends into the interior of the fourth internal slot, and a torsion spring is disposed outside the second rotating shaft and inside the fourth internal slot. One end of the torsion spring is fixedly connected to the inner wall of the fourth internal slot, and the other end of the second rotating shaft is fixedly connected to the outside of the second rotating shaft.

[0010] Preferably, a push groove is provided inside the box body and on one side of the T-shaped groove. A push plate is fixedly connected to one end of the T-shaped groove. The push plate is slidably connected to the inside of the push groove. A first telescopic spring is provided inside the push groove. One end of the first telescopic spring is fixedly connected to the inner wall of the push groove, and the other end of the first telescopic spring is fixedly connected to one side of the push plate.

[0011] Preferably, the interior of the housing has multiple fifth internal grooves, with one end of each fifth internal groove extending into the interior of the fifth internal groove. A first sliding groove is formed inside the housing and on the outside of the fifth internal groove. A pressure block is slidably connected inside the first sliding groove. A second sliding groove is formed inside the housing and on one side of the three first sliding grooves. A pressure rod is slidably connected inside the second sliding groove. The pressure rod is fixedly connected to multiple pressure blocks. Multiple second telescopic springs are provided inside the second sliding groove. One end of each second telescopic spring is fixedly connected to a pressure block, and the other end is fixedly connected to the inner wall of the second sliding groove. One end of the pressure rod extends to the outside of the housing and is fixedly connected to a pressure plate. Through the cooperation of the pressure block, the second telescopic springs, the pressure rod, and the pressure plate, the winding speed of the connecting wire can be controlled by the friction between the bottom of the pressure block and the first rotating shaft, thus improving the practicality of this laser ultrasonic non-destructive testing device for residual stress in metal welding.

[0012] Preferably, a rotating plate is rotatably connected to the top of the mounting slot, and multiple scrapers are fixedly connected to the top of the rotating plate. A connecting wire is wound around the outside of the rotating roller, and the connecting wire is wound from the middle to the outside of the rotating roller. Both ends of the connecting wire pass through the rotating plate and the scrapers. The scrapers and the connecting wire cooperate with each other. A laser ultrasonic testing head and a digital oscilloscope are placed inside the housing. The laser ultrasonic testing head adopts a MAGNAI sub-nanosecond pulse laser from INNOLAS, Germany, and the digital oscilloscope adopts a DPO3034 oscilloscope from Tektronix, USA.

[0013] This invention provides a laser ultrasonic non-destructive testing device for residual stress in metal welding, which has the following advantages:

[0014] 1. This laser ultrasonic non-destructive testing device for residual stress in metal welding, by pulling the two ends of the connecting wire, drives the rotating roller and the first rotating shaft to rotate, thereby winding the spring. At the same time, through the cooperation of the first rotating shaft, ratchet, second rotating shaft and pawl, the first rotating shaft and the spring can be limited to prevent the spring from rebounding during the testing process, driving the first rotating shaft and the rotating roller to wind the connecting wire. After use, the push plate is pushed to slide into the push groove, which in turn pushes the push rod and the second connecting plate, and then drives the first connecting plate and the second rotating shaft to rotate, thereby driving the pawl to rotate, releasing the ratchet from its limit, causing the spring to rebound, thus driving the first rotating shaft and the rotating roller to wind the connecting wire, thereby improving the practicality of this laser ultrasonic non-destructive testing device for residual stress in metal welding.

[0015] 2. This laser ultrasonic non-destructive testing device for residual stress in metal welding uses a pressing plate to drive a pressing rod and multiple pressing blocks to slide into the fifth internal groove, so that the bottom of the pressing block contacts the first rotating shaft. The friction generated between the pressing block and the first rotating shaft controls the winding speed of the connecting wire by the first rotating shaft and the rotating roller. The scraper can scrape off the debris adhering to the outside of the connecting wire during winding, thus improving the practicality of this laser ultrasonic non-destructive testing device for residual stress in metal welding. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural diagram of the interior of the housing of this utility model;

[0018] Figure 3 This is a schematic diagram of the limiting mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the control mechanism of this utility model.

[0020] In the diagram: 1. Housing; 2. Laser ultrasonic testing head; 3. Digital oscilloscope; 4. Mounting slot; 5. Rotating plate; 6. Rotating roller; 7. Connecting wire; 8. Scraper; 9. First internal slot; 10. First rotating shaft; 11. Spring; 12. Second internal slot; 13. Ratchet; 15. Second rotating shaft; 16. Pawl; 17. Third internal slot; 18. First connecting plate; 19. T-slot; 20. Push rod; 21. Second connecting plate; 22. Fourth internal slot; 23. Torsion spring; 24. Push groove; 25. Push plate; 26. First telescopic spring; 27. Fifth internal slot; 28. First slide groove; 29. ​​Pressure block; 30. Second slide groove; 31. Second telescopic spring; 32. Pressure rod; 33. Pressure plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Please see Figures 1 to 4This utility model provides a technical solution: a laser ultrasonic non-destructive testing device for residual stress in metal welding, including a housing 1, an installation groove 4 inside the housing 1, a plurality of first rotating shafts 10 rotatably connected inside the installation groove 4, a rotating rod 6 fixedly connected to the outside of the first rotating shafts 10 and inside the installation groove 4, a plurality of second internal grooves 12 inside the housing 1, a plurality of first internal grooves 9 inside the housing 1, one end of the first rotating shaft 10 passing through the first internal groove 9 and the second internal groove 12, a spring 11 is provided outside the first rotating shaft 10 and inside the first internal groove 9, one end of the spring 11 is fixedly connected to the inner wall of the first internal groove 9, the other end of the spring 11 is fixedly connected to the outside of the first rotating shaft 10, and a limit mechanism is provided outside the first rotating shaft 10 and inside the second internal groove 12.

[0023] The limiting mechanism includes a ratchet 13, which is fixedly connected to the outside of the first rotating shaft 10 and located inside the second internal groove 12. The second rotating shaft 15 is rotatably connected inside the second internal groove 12. A pawl 16 is fixedly connected to the outside of the second rotating shaft 15 and located inside the second internal groove 12. The ratchet 13 and the pawl 16 cooperate with each other. Through the cooperation of the first rotating shaft 10, the ratchet 13, the second rotating shaft 15 and the pawl 16, the first rotating shaft 10 and the mainspring 11 can be limited to prevent the mainspring 11 from rebounding during the detection process and driving the first rotating shaft 10 and the rotating roller 6 to wind up the connecting wire 7.

[0024] The housing 1 has multiple third internal grooves 17 inside. One end of the second rotating shaft 15 extends into the interior of the third internal groove 17. A first connecting plate 18 is fixedly connected to the outside of the second rotating shaft 15 and inside the third internal groove 17. A T-shaped groove 19 is opened inside the housing 1 and on one side of the three third internal grooves 17. A push rod 20 is slidably connected inside the T-shaped groove 19. Three second connecting plates 21 are fixedly connected to the bottom of the push rod 20. The second connecting plates 21 cooperate with the first connecting plates 18. Through the cooperation of the push rod 20, the second connecting plates 21 and the first connecting plates 18, the second rotating shaft 15 and the pawl 16 can be driven to rotate, thereby releasing the limit on the ratchet 13.

[0025] The housing 1 has multiple fourth internal grooves 22 inside. One end of the second rotating shaft 15 extends into the interior of the fourth internal groove 22. A torsion spring 23 is provided on the outside of the second rotating shaft 15 and inside the fourth internal groove 22. One end of the torsion spring 23 is fixedly connected to the inner wall of the fourth internal groove 22, and the other end of the second rotating shaft 15 is fixedly connected to the outside of the second rotating shaft 15.

[0026] Inside the housing 1, on one side of the T-slot 19, a push groove 24 is provided. One end of the T-slot 19 is fixedly connected to a push plate 25, which is slidably connected inside the push groove 24. Inside the push groove 24, a first telescopic spring 26 is provided. One end of the first telescopic spring 26 is fixedly connected to the inner wall of the push groove 24, and the other end of the first telescopic spring 26 is fixedly connected to one side of the push plate 25.

[0027] The interior of the housing 1 has multiple fifth internal grooves 27, with one end of each fifth internal groove 27 extending into its interior. A first sliding groove 28 is located inside the housing 1 and on the outer side of each fifth internal groove 27. A pressure block 29 is slidably connected inside the first sliding groove 28. A second sliding groove 30 is located inside the housing 1 and on one side of the three first sliding grooves 28. A pressure rod 32 is slidably connected inside the second sliding groove 30 and is fixedly connected to multiple pressure blocks 29. Multiple second telescopic... Spring 31, one end of the second telescopic spring 31 is fixedly connected to the pressure block 29, and the other end of the second telescopic spring 31 is fixedly connected to the inner wall of the second slide groove 30. One end of the pressure rod 32 extends to the outside of the box 1 and is fixedly connected to the pressure plate 33. Through the cooperation of the pressure block 29, the second telescopic spring 31, the pressure rod 32 and the pressure plate 33, the friction between the bottom of the pressure block 29 and the first rotating shaft 10 can be used to control the winding speed of the connecting wire 7, thereby improving the practicality of the laser ultrasonic non-destructive detector for residual stress of metal welding.

[0028] A rotating plate 5 is rotatably connected to the top of the mounting slot 4. Multiple scrapers 8 are fixedly connected to the top of the rotating plate 5. A connecting wire 7 is wound around the outside of the rotating roller 6. The connecting wire 7 is wound from the middle to the outside of the rotating roller 6. Both ends of the connecting wire 7 pass through the rotating plate 5 and the scrapers 8. The scrapers 8 and the connecting wire 7 cooperate with each other. Inside the housing 1, a laser ultrasonic testing head 2 and a digital oscilloscope 3 are placed. The laser ultrasonic testing head 2 adopts the MAGNAI sub-nanosecond pulse laser from INNOLAS, Germany. The digital oscilloscope 3 adopts the DPO3034 oscilloscope from Tektronix, USA.

[0029] In summary, this laser ultrasonic non-destructive testing device for residual stress in metal welding operates as follows: When the user pulls on both ends of the connecting wire 7, it causes the rotating roller 6 and the first rotating shaft 10 to rotate, thereby winding the spring 11. Simultaneously, the interaction of the first rotating shaft 10, ratchet 13, second rotating shaft 15, and pawl 16 limits the movement of the first rotating shaft 10 and the spring 11, preventing the spring 11 from rebounding during testing. This causes the first rotating shaft 10 and the rotating roller 6 to wind the connecting wire 7. After use, the push plate 25 is pushed into the push groove 24, which in turn pushes the push rod 20 and the second connecting plate 21, and then drives the first connecting plate... 18 and the second rotating shaft 15 rotate, thereby driving the pawl 16 to rotate, releasing it from the limit on the ratchet 13, causing the spring 11 to rebound, thereby driving the first rotating shaft 10 and the rotating roller 6 to wind up the connecting wire 7. During winding, the pressure plate 33 can be pressed to drive the pressure rod 32 and multiple pressure blocks 29 to slide into the interior of the fifth internal groove 27, so that the bottom of the pressure block 29 contacts the first rotating shaft 10. Thus, the friction generated between the pressure block 29 and the first rotating shaft 10 controls the winding speed of the first rotating shaft 10 and the rotating roller 6 on the connecting wire 7. The scraper 8 can scrape off the debris adhering to the outside of the connecting wire 7 when winding it up.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A laser ultrasonic non-destructive testing device for residual stress in metal welding, comprising a housing (1), characterized in that: The housing (1) has an installation groove (4) inside. Multiple first rotating shafts (10) are rotatably connected inside the installation groove (4). A rotating rod (6) is fixedly connected to the outside of the first rotating shaft (10) and inside the installation groove (4). Multiple second internal grooves (12) are opened inside the housing (1). Multiple first internal grooves (9) are opened inside the housing (1). One end of the first rotating shaft (10) passes through the first internal groove (9) and the second internal groove (12). A spring (11) is provided outside the first rotating shaft (10) and inside the first internal groove (9). One end of the spring (11) is fixedly connected to the inner wall of the first internal groove (9). The other end of the spring (11) is fixedly connected to the outside of the first rotating shaft (10). A limit mechanism is provided outside the first rotating shaft (10) and inside the second internal groove (12).

2. The laser ultrasonic non-destructive testing device for residual stress in metal welding according to claim 1, characterized in that: The limiting mechanism includes a ratchet (13), which is fixedly connected to the outside of the first rotating shaft (10) and located inside the second inner groove (12). The second inner groove (12) is rotatably connected to a second rotating shaft (15), and a pawl (16) is fixedly connected to the outside of the second rotating shaft (15) and located inside the second inner groove (12). The ratchet (13) and the pawl (16) cooperate with each other.

3. The laser ultrasonic non-destructive testing device for residual stress in metal welding according to claim 2, characterized in that: The box body (1) has multiple third internal grooves (17) inside. One end of the second rotating shaft (15) extends into the interior of the third internal groove (17). A first connecting plate (18) is fixedly connected to the outside of the second rotating shaft (15) and inside the third internal groove (17). A T-shaped groove (19) is opened inside the box body (1) and on one side of the three third internal grooves (17). A push rod (20) is slidably connected inside the T-shaped groove (19). Three second connecting plates (21) are fixedly connected to the bottom of the push rod (20). The second connecting plates (21) cooperate with the first connecting plates (18).

4. The laser ultrasonic non-destructive testing device for residual stress in metal welding according to claim 3, characterized in that: The box (1) has multiple fourth internal grooves (22) inside. One end of the second rotating shaft (15) extends into the interior of the fourth internal groove (22). A torsion spring (23) is provided outside the second rotating shaft (15) and inside the fourth internal groove (22). One end of the torsion spring (23) is fixedly connected to the inner wall of the fourth internal groove (22), and the other end of the second rotating shaft (15) is fixedly connected to the outside of the second rotating shaft (15).

5. A laser ultrasonic non-destructive testing device for residual stress in metal welding according to claim 3, characterized in that: Inside the housing (1) and on one side of the T-slot (19), there is a push groove (24). One end of the T-slot (19) is fixedly connected to a push plate (25). The push plate (25) is slidably connected inside the push groove (24). Inside the push groove (24), there is a first telescopic spring (26). One end of the first telescopic spring (26) is fixedly connected to the inner wall of the push groove (24), and the other end of the first telescopic spring (26) is fixedly connected to one side of the push plate (25).

6. The laser ultrasonic non-destructive testing device for residual stress in metal welding according to claim 1, characterized in that: The box body (1) has multiple fifth internal grooves (27) inside. The other end of the fifth internal groove (27) extends into the interior of the fifth internal groove (27). The box body (1) has a first sliding groove (28) inside and outside the fifth internal groove (27). A pressure block (29) is slidably connected inside the first sliding groove (28). The box body (1) has a second sliding groove (30) inside and on one side of the three first sliding grooves (28). A pressure rod (32) is slidably connected inside the second sliding groove (30). The pressure rod (32) is fixedly connected to multiple pressure blocks (29). Multiple second telescopic springs (31) are provided inside the second sliding groove (30). One end of the second telescopic spring (31) is fixedly connected to the pressure block (29). The other end of the second telescopic spring (31) is fixedly connected to the inner wall of the second sliding groove (30). One end of the pressure rod (32) extends to the outside of the box body (1) and is fixedly connected to a pressure plate (33).

7. A laser ultrasonic non-destructive testing device for residual stress in metal welding according to claim 1, characterized in that: A rotating plate (5) is rotatably connected to the top of the mounting groove (4). Multiple scrapers (8) are fixedly connected to the top of the rotating plate (5). A connecting line (7) is wound around the outside of the rotating roller (6). The connecting line (7) is wound from the middle to the outside of the rotating roller (6). Both ends of the connecting line (7) pass through the rotating plate (5) and the scrapers (8). The scrapers (8) and the connecting line (7) cooperate with each other. A laser ultrasonic detection head (2) and a digital oscilloscope (3) are placed inside the housing (1).

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