Steel structure welding seam residual stress detection device and use method

Abstract

The invention discloses a steel structure welding seam residual stress detection device and a using method, the steel structure welding seam residual stress detection device comprises a roller, a mounting seat and a working unit, the working unit comprises an infrared feedback device, a stress detection device, a detection marking device and a telescopic device, the working unit rotates along with the roller, and the infrared feedback device is connected with the mounting seat. And simultaneously carrying out infrared detection, stress detection and detection marking on the steel structure welding seam. The problems that when the steel material is too large or is not prone to overturning, the steel material needs to be manually overturned and then detected again, inconvenience is brought, when multiple welding seams are detected, the position of the steel material needs to be adjusted again, the positions of the welding seams cannot be captured, and the positions of the welding seams with detected overstress cannot be visually observed are solved. And stress detection can be carried out on irregular welding seams.

Description

Technical Field

[0001] The invention relates to the field of weld residual stress detection, in particular to a steel structure weld residual stress detection device and a use method. Background Art

[0002] Welding is a commonly used metal connection method. It heats two or more metal parts to the melting point, melts them and forms a connection during the cooling process. However, due to the uneven distribution of heat and the difference in thermal expansion coefficients of different materials, residual stress will remain at the weld after welding, which is the weld residual stress. Weld residual stress has an important influence on the performance and life of the welded joint. It will cause the welded joint to deform, crack and even cause damage to the welded joint during use. Therefore, accurate detection of welding residual stress is crucial to ensure the quality of the welded joint.

[0003] A search of CN118209631A discloses a flipping tool for detecting residual stress in steel structure welding, which can flip the detection unit, thus avoiding the problem caused by the difficulty in flipping large steel structures.

[0004] However, it was found through exploration that this technical solution still has at least the following defects:

[0005] In actual use, although the above-mentioned equipment can flip the detection unit, there are some special steel materials with irregular welds. It is inconvenient for the above-mentioned equipment to perform stress detection on irregular welds, and the position of the working unit cannot be adjusted. When detecting multiple welds, the position of the steel material needs to be readjusted. At the same time, the weld position cannot be accurately captured, and it is impossible to intuitively observe which weld positions have been detected, which brings inconvenience to the detection. Summary of the invention

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0007] A steel structure weld residual stress detection device comprises a roller, a mounting seat and a working unit, wherein the roller is arranged above the mounting seat, the working unit comprises an infrared feedback device, a stress detection device, a detection marking device and a telescopic device, the telescopic device comprises a telescopic rod and a telescopic sleeve, the bottom end of the telescopic sleeve is connected to the inside of the roller, the telescopic rod is arranged inside the telescopic sleeve, the telescopic rod and the telescopic sleeve are slidably connected, the stress detection device is arranged inside the telescopic rod, the infrared feedback device is fixedly arranged on one side of the stress detection device, and the detection marking device is arranged on the other side of the stress detection device, the design of the roller and the mounting seat enables the roller to rotate circumferentially along the mounting seat, the working unit rotates circumferentially with the roller, and can detect different positions of the weld, the design of the telescopic device enables the working unit to adjust the distance between the working unit and the weld, so that the detection is more accurate and reliable, and the error is reduced, the working unit comprises an infrared feedback device, a stress detection device and a detection marking device, so that the steel structure weld residual stress detection device can simultaneously locate and detect the weld and mark the detected weld.

[0008] Furthermore, a slide groove is provided inside the drum, a lead screw is provided in the slide groove, a lead screw motor is provided at one end of the lead screw, the lead screw and the rotating shaft of the lead screw motor are fixedly connected, the bottom end of the telescopic sleeve is hinged to the lead screw, and an annular rack is provided on the outside of the drum. The design of the lead screw in the slide groove and the lead screw motor at one end of the lead screw enables the working unit to slide along the slide groove and change its position along the axial position of the drum. The design of the hinged connection between the bottom end of the telescopic sleeve and the lead screw enables the working unit to rotate along the vertical direction of the lead screw, which is convenient for aligning the weld position. At the same time, when detecting multiple welds, there is no need to adjust the position of the material to be tested.

[0009] Furthermore, it also includes a mounting seat and a bevel gear, a motor is arranged on the side of the mounting seat, the arc bottom surface of the mounting seat is open, the bevel gear is arranged on the end face of the rotating shaft of the motor, the annular rack is meshed with the rotating shaft of the motor through the bevel gear, the arc bottom surface of the mounting seat is open, and the annular rack is meshed with the rotating shaft of the motor through the bevel gear, so that the rotation of the drum along the mounting seat becomes controllable, and the rotation angle of the drum is controlled by the motor, thereby controlling the position of the working unit.

[0010] Furthermore, the infrared feedback device includes an infrared probe and a feedback system. The feedback system is arranged above the infrared probe. The feedback system and the infrared probe are fixedly connected. The design of the infrared feedback device enables the device to capture the weld position before detection and feed it back to the feedback system.

[0011] Furthermore, the stress detection device includes a detection probe and a protective plate, wherein the protective plate is arranged below the detection probe, and the protective plate and the detection probe are fixedly connected. The design of the protective plate maintains a constant distance between the stress detection probe and the weld, thereby making the detection result more accurate and reducing the detection error caused by the change of the detection distance.

[0012] Furthermore, the detection marking device includes a marking probe and a paint box, wherein the paint box is arranged above the marking probe, and the paint box and the marking probe are fixedly connected. The design of the detection marking device enables the welds that have been inspected to be marked during the process of inspecting the welds, thereby avoiding detection errors caused by repeated detection and missed detection.

[0013] Furthermore, the marking probe protrudes from the infrared probe and the detection probe. The design of the marking probe protruding from the infrared probe and the detection probe makes the detection position more accurate and reduces the detection error caused by the detection position deviation.

[0014] Furthermore, it also includes a supporting unit, which includes a base and a supporting block, the supporting block is fixedly arranged above the base, the mounting seat is arranged above the base, and the mounting seat is arranged on the inner side of the supporting block. The design of the supporting unit enables the steel material to be reasonably placed at the position to be detected, thereby preventing unnecessary detection errors caused by unreasonable placement of the steel material.

[0015] Furthermore, it also includes a clamping unit, which includes a fixing block, a fixing screw, a fixing nut, a fixing piece and a screw, the fixing piece is L-shaped, one end of the fixing piece extends into the interior of the fixing block, one end of the fixing screw is fixedly connected to the side of the support block, the other end of the fixing screw passes through the fixing block, the fixing nut is arranged on the outside of the fixing block, the fixing nut and the fixing screw are threadedly connected, the screw passes through the fixing piece, and one end of the screw extends into the interior of the fixing block. The design of the clamping unit enables the steel material to be fixed at the position to be tested, thereby avoiding the position displacement of the steel material during the detection process. The design of the fixing screw and the fixing nut ensures the stability of the steel material in the horizontal direction, and the design of the screw ensures the stability of the steel material in the vertical direction.

[0016] Furthermore, it also includes a spring, one end of which is fixedly connected to the telescopic rod, and the other end of which is fixedly connected to the bottom of the telescopic sleeve. A hinge is provided at the bottom end of the telescopic sleeve, and a deflection motor is provided on the side of the hinge. The design of the spring enables the working unit to fit the weld, thereby ensuring a constant distance between the working unit and the weld, and avoiding measurement errors caused by changes in the distance between the working unit and the weld. The design of the hinge enables the working unit to rotate relative to the slide slot as the hinge is rotated. The design of the deflection motor enables the working unit to rotate around the lead screw during operation, so that the working unit always remains perpendicular to the part to be measured.

[0017] A steel structure weld residual stress detection device and a method for using the device include the following specific steps:

[0018] S1. Place the steel material on top of the support block and adjust it to a suitable position. Adjust the fixing nuts at both ends. The fixing screw and the fixing nut work together to limit the horizontal movement of the steel material. Adjust the screw to limit the vertical movement of the steel material, thereby fixing the steel material.

[0019] S2. Adjust the motor, the motor drives the helical gear on the end face of the motor rotating shaft to rotate, the helical gear and the annular rack are meshed, thereby driving the roller to rotate along the mounting seat, moving the working unit to a suitable longitudinal position, adjusting the lead screw motor, the lead screw motor rotating shaft rotates, driving the working unit to move along the direction of the slide slot, moving the working unit to a suitable horizontal position, until the infrared probe is aligned with the starting position of the weld, ensuring that the feedback system can capture the accurate position of the weld, and completing the preliminary adjustment;

[0020] S3. Adjust the positions of the spring and the telescopic rod to ensure that the infrared probe and the detection probe are aligned with the weld and the marking probe fits the weld;

[0021] S4, simultaneously starting the infrared feedback device, the stress detection device and the detection marking device, wherein the infrared feedback device accurately locates the position of the weld, the feedback system receives the feedback signal, the stress detection device starts to move along the weld path fed back by the infrared feedback device, and performs stress detection on the weld, and the detection marking device marks the position of the weld that has been detected;

[0022] S5. After the detection is completed, turn off the infrared feedback device, stress detection device and detection marking device, and adjust the spring and telescopic rod at the same time to make the infrared probe, detection probe and marking probe separate from the weld, adjust the fixing nut and screw to make the steel material separate from the clamping unit, and finally remove the steel material.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention can flip the working unit, avoiding the difficulty of flipping the steel material for detection, and can capture the weld position and mark the weld position where stress has been detected, and can perform stress detection on irregular welds. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a stereogram of the detection device;

[0026] Figure 2 It is a structural schematic diagram of the clamping unit;

[0027] Figure 3 It is a schematic diagram of the structure of the drum, the mounting base and the detection unit;

[0028] Figure 4 It is the front view of the structural diagram of the cooperation between the chute and the detection unit;

[0029] Figure 5 It is a side view of the structural schematic diagram of the cooperation between the chute and the detection unit;

[0030] Figure 6 It is a front view of the structural schematic diagram of the detection unit;

[0031] Figure 7 It is the front view of the structural diagram of the detection unit.

[0032] Wherein: 1. base, 2. support block, 3. fixing block, 4. fixing screw, 5. fixing nut, 6. fixing part, 7. screw, 8. roller, 9. ring rack, 10. mounting seat, 11. motor, 12. bevel gear, 13. slideway, 14. lead screw, 15. lead screw motor, 16. infrared feedback device, 161. infrared probe, 162. feedback system, 17. stress detection device, 171. detection probe, 172. protection plate, 18. detection marking device, 181. marking probe, 182. paint box, 19. spring, 20. telescopic rod, 21. telescopic sleeve, 211. hinge, 212. deflection motor, 22. steel material, 23. weld. DETAILED DESCRIPTION

[0033] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0034] Embodiment 1

[0035] like Figures 1 to 7As shown, a residual stress detection device for a steel structure weld includes a roller 8, a mounting seat 10 and a working unit, wherein the roller 8 is arranged above the mounting seat 10, and the working unit includes an infrared feedback device 16, a stress detection device 17, a detection mark device 18 and a telescopic device, wherein the telescopic device includes a telescopic rod 20 and a telescopic sleeve 21, wherein the bottom end of the telescopic sleeve 21 is connected to the inside of the roller 8, the telescopic rod 20 is arranged inside the telescopic sleeve 21, and the telescopic rod 20 and the telescopic sleeve 21 are slidably connected, the stress detection device 17 is arranged inside the telescopic rod 20, the infrared feedback device 16 is fixedly arranged on one side of the stress detection device 17, the detection mark device 18 is arranged on the other side of the stress detection device, and the infrared feedback device 16 is fixedly arranged on one side of the stress detection device 17, and the detection mark device 18 is arranged on the other side of the stress detection device. The device 16 and the detection mark device 18 are symmetrically arranged relative to the stress detection device 17. A slide groove 13 is arranged inside the drum 8, and a screw 14 is arranged inside the slide groove 13. A screw motor 15 is arranged at one end of the screw 14. The screw 14 and the rotating shaft of the screw motor 15 are fixedly connected. The bottom end of the telescopic sleeve 21 is hinged to the screw 14. An annular rack 9 is arranged on the outside of the drum 8, and also includes a mounting seat 10 and a bevel gear 12. A motor 11 is arranged on the side of the mounting seat 10. The arc bottom surface of the mounting seat 10 is open. The bevel gear 12 is arranged on the end face of the rotating shaft of the motor 11. The annular rack 9 is meshed with the rotating shaft of the motor 11 through the bevel gear 12. The infrared feedback device 16 includes an infrared probe 161 and a feedback The system 162, the feedback system 162 is arranged above the infrared probe 161, the feedback system 162 and the infrared probe 161 are fixedly connected, the stress detection device 17 includes a detection probe 171 and a protection plate 172, the protection plate 172 is arranged below the detection probe 171, the protection plate 172 and the detection probe 171 are fixedly connected, the detection mark device 18 includes a mark probe 181 and a paint box 182, the paint box 182 is arranged above the mark probe 181, the paint box 182 and the mark probe 181 are fixedly connected, the mark probe 181 protrudes from the infrared probe 161 and the detection probe 171, and also includes a support unit, the support unit includes a base 1 and a support block 2, the support block 2 The mounting base 10 is fixedly arranged above the base 1, and the mounting base 10 is arranged above the base 1. The mounting base 10 is arranged on the inner side of the support block 2, and also includes a clamping unit, and the clamping unit includes a fixing block 3, a fixing screw 4, a fixing nut 5, a fixing piece 6 and a screw 7. The fixing piece 6 is L-shaped, and one end of the fixing piece 6 extends into the interior of the fixing block 3. One end of the fixing screw 4 is fixedly connected to the side of the support block 2, and the other end of the fixing screw 4 passes through the fixing block 3. The fixing nut 5 is arranged on the outer side of the fixing block 3. The fixing nut 5 is threadedly connected to the fixing screw 4. The screw 7 passes through the fixing piece 6, and one end of the screw 7 extends into the interior of the fixing block 3. It also includes a spring 19, and one end of the spring 19 is fixedly connected to the telescopic rod 20.The other end of the spring 19 is fixedly connected to the bottom of the telescopic sleeve 21. The bottom of the telescopic sleeve 21 is provided with a hinge 211, and a deflection motor is provided on the side of the hinge 211.

[0036] Embodiment 2

[0037] like Figures 1 to 7 As shown, a steel structure weld residual stress detection device and a method for using the device include the following specific steps:

[0038] S1. Place the steel material 22 on the top of the support block 2 and adjust it to a suitable position. Adjust the fixing nuts 5 at both ends. The fixing screw 4 and the fixing nut 5 work together to limit the horizontal movement of the steel material 22. Adjust the screw 7 to limit the vertical movement of the steel material 22, thereby fixing the steel material 22.

[0039] S2, adjusting the motor 11, the motor 11 drives the bevel gear 12 on the end face of the rotating shaft of the motor 11 to rotate, the bevel gear 12 and the annular rack 9 are meshed, thereby driving the roller 8 to rotate along the mounting seat 10, and moving the working unit to a suitable longitudinal position, adjusting the screw motor 15, the rotating shaft of the screw motor 15 rotates, driving the working unit to move along the direction of the slide slot 13, and moving the working unit to a suitable horizontal position, until the infrared probe 161 is aligned with the starting position of the weld 23, ensuring that the feedback system 162 can capture the accurate position of the weld 23, and completing the preliminary adjustment;

[0040] S3, adjusting the positions of the spring 19 and the telescopic rod 20 to ensure that the infrared probe 161 and the detection probe 171 are aligned with the weld 23, and the marking probe 181 is in contact with the weld 23;

[0041] S4, simultaneously starting the infrared feedback device 16, the stress detection device 17 and the detection marking device 18, the infrared feedback device 16 accurately locates the position of the weld 23, the feedback system 162 receives the feedback signal, the stress detection device 17 starts to move along the path of the weld 23 fed back by the infrared feedback device 16, and performs stress detection on the weld 23, and the detection marking device 18 marks the position of the weld 23 that has been detected;

[0042] S5. After the detection is completed, turn off the infrared feedback device 16, the stress detection device 17 and the detection marking device 18, and adjust the spring 19 and the telescopic rod 20 at the same time to make the infrared probe 161, the detection probe 171 and the marking probe 181 separate from the weld 23, adjust the fixing nut 5 and the screw 7 to make the steel material 22 separate from the clamping unit, and finally remove the steel material 22.

[0043] Embodiment 3

[0044] like Figures 1 to 7As shown, a steel structure weld residual stress detection device is different from the first embodiment in that there are irregular welds 23. In this case, during the detection work, the motor 11 and the screw motor 15 are adjusted at the same time, thereby changing the position of the working unit, and the infrared probe 161, the detection probe 171 and the marking probe 181 in the working unit are aligned in real time with the position of the weld 23 to be detected, thereby meeting the stress detection requirements for the irregular weld 23; when detecting multiple welds 23, the screw motor 15 and the motor 11 are adjusted, so that the position of the working unit can be adjusted without changing the position of the steel material 22, and aligned with other welds 23, and then the other welds 23 are detected.

Claims

1. A steel structure weld residual stress detection device, characterized in that: The invention comprises a roller (8), a mounting seat (10) and a working unit, wherein the roller (8) is arranged above the mounting seat (10), the working unit comprises an infrared feedback device (16), a stress detection device (17), a detection mark device (18) and a telescopic device, the telescopic device comprises a telescopic rod (20) and a telescopic sleeve (21), the bottom end of the telescopic sleeve (21) is connected to the inside of the roller (8), the telescopic rod (20) is arranged inside the telescopic sleeve (21), the telescopic rod (20) and the telescopic sleeve (21) are slidably connected, the stress detection device (17) is arranged inside the telescopic rod (20), the infrared feedback device (16) is fixedly arranged on one side of the stress detection device (17), and the detection mark device (18) is arranged on the other side of the stress detection device.

2. A steel structure weld residual stress detection device according to claim 1, characterized in that: The roller (8) is provided with a slide groove (13) inside, a lead screw (14) is provided inside the slide groove (13), a lead screw motor (15) is provided at one end of the lead screw (14), the lead screw (14) and the rotating shaft of the lead screw motor (15) are fixedly connected, the bottom end of the telescopic sleeve (21) is hinged to the lead screw (14), and an annular rack (9) is provided on the outside of the roller (8).

3. A steel structure weld residual stress detection device according to claim 1, characterized in that: It also includes a mounting seat (10) and a bevel gear (12); a motor (11) is arranged on the side of the mounting seat (10); the arc bottom surface of the mounting seat (10) is open; the bevel gear (12) is arranged on the end surface of the rotating shaft of the motor (11); and the annular rack (9) is meshed with the rotating shaft of the motor (11) through the bevel gear (12).

4. The device for detecting residual stress in a steel structure weld according to claim 1, characterized in that: The infrared feedback device (16) comprises an infrared probe (161) and a feedback system (162); the feedback system (162) is arranged above the infrared probe (161); and the feedback system (162) and the infrared probe (161) are fixedly connected.

5. The device for detecting residual stress of a steel structure weld according to claim 1, characterized in that: The stress detection device (17) comprises a detection probe (171) and a protection plate (172); the protection plate (172) is arranged below the detection probe (171); and the protection plate (172) and the detection probe (171) are fixedly connected.

6. A steel structure weld residual stress detection device according to claim 1, characterized in that: The marking detection device (18) comprises a marking probe (181) and a paint box (182); the paint box (182) is arranged above the marking probe (181); the paint box (182) and the marking probe (181) are fixedly connected; and the marking probe (181) protrudes from the infrared probe (161) and the detection probe (171).

7. A steel structure weld residual stress detection device according to claim 1, characterized in that: The invention also comprises a support unit, the support unit comprising a base (1) and a support block (2), the support block (2) being fixedly arranged above the base (1), the mounting seat (10) being arranged above the base (1), and the mounting seat (10) being arranged on the inner side of the support block (2).

8. A steel structure weld residual stress detection device according to claim 1, characterized in that: The invention also comprises a clamping unit, which comprises a fixing block (3), a fixing screw (4), a fixing nut (5), a fixing piece (6) and a screw (7); the fixing piece (6) is L-shaped, one end of the fixing piece (6) extends into the interior of the fixing block (3); one end of the fixing screw (4) is fixedly connected to the side of the support block (2); the other end of the fixing screw (4) passes through the fixing block (3); the fixing nut (5) is arranged on the outside of the fixing block (3); the fixing nut (5) and the fixing screw (4) are threadedly connected; the screw (7) passes through the fixing piece (6); and one end of the screw (7) extends into the interior of the fixing block (3).

9. A steel structure weld residual stress detection device according to claim 1, characterized in that: It also comprises a spring (19), one end of the spring (19) being fixedly connected to the telescopic rod (20), and the other end of the spring (19) being fixedly connected to the bottom of the telescopic sleeve (21), a hinge (211) being provided at the bottom of the telescopic sleeve (21), and a deflection motor (212) being provided on the side of the hinge (211).

10. A steel structure weld residual stress detection device and use method according to any one of claims 1 to 9, characterized in that: The specific steps include: S1. Place the steel material (22) above the support block (5), adjust it to a suitable position, and adjust the fixing nut (5) and the screw (7) to fix the steel material (22); S2, adjusting the motor (11) and the lead screw motor (15), aligning the infrared probe (161) with the starting position of the weld (23), and ensuring that the feedback system (162) can capture the accurate position of the weld (23); S3, adjusting the positions of the spring (19) and the telescopic rod (20) to ensure that the infrared probe (161) is aligned with the weld (23) and the marking probe (181) is in contact with the weld; S4, simultaneously starting the infrared feedback device (16), the stress detection device (17) and the detection marking device (18), wherein the infrared feedback device (16) accurately locates the position of the weld (23), the feedback system (162) receives the feedback signal, the stress detection device (17) starts to move along the weld (23) path fed back by the infrared feedback device (16), and performs stress detection on the weld (23), and the detection marking device (18) marks the position of the detected weld (23); S5. After the detection is completed, turn off the infrared feedback device (16), the stress detection device (17) and the detection marking device (18), and adjust the spring (19) and the telescopic rod (20) at the same time to make the infrared probe (161), the detection probe (171) and the marking probe (181) separate from the weld (23), adjust the fixing nut (5) and the screw (7) to make the steel material (22) separate from the clamping unit, and finally remove the steel material (22).

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