Weld defect detection device

Abstract

The invention discloses a welding seam defect detection device, and belongs to the technical field of ultrasonic welding seam flaw detection, the welding seam defect detection device comprises a rack, the rack is provided with a framework; the conveying part comprises a horizontally-arranged conveying belt, an engine sleeve is placed on the top face of the conveying belt, fins arranged in an annular array mode are installed on the outer wall of the upper portion of the engine sleeve, and welding seams are formed between the fins and the engine sleeve. Through the arrangement of the rack, the conveying piece, the pretreatment piece and the ultrasonic flaw detection piece, before flaw detection, in order to ensure the flatness of the position of a welding seam, the grinding wheel of the pretreatment piece is used for grinding the welding seam to obtain a flat welding seam surface, and a coupling agent is thrown to the welding seam and fully coated with tiny grooves of the welding seam through centrifugal force of the grinding wheel; therefore, during subsequent ultrasonic flaw detection, the ultrasonic transceiving probe and the weld joint are compensated by a coupling agent, and bubbles in a weld joint groove are prevented from influencing the flaw detection effect.

Description

Technical Field

[0001] This invention belongs to the field of ultrasonic weld flaw detection technology, and specifically relates to a weld defect detection device. Background Technology

[0002] Ultrasonic weld flaw detection is a non-destructive testing technique that utilizes the propagation characteristics of high-frequency sound waves in materials to detect internal defects in welds. Its principle involves emitting sound waves into the weldment using an ultrasonic probe. When these sound waves encounter defects such as cracks or pores, they are reflected or scattered. By analyzing the echo signals, the location, size, and nature of the defects can be determined. This method is widely used in steel structures, pressure vessels, aerospace, and other fields, offering advantages such as high sensitivity, fast detection speed, and harmlessness to humans. In practice, direct or oblique beam methods are often employed, combined with new technologies such as phased arrays and deep learning to improve detection accuracy and efficiency.

[0003] Chinese Patent CN216718301U discloses an ultrasonic weld flaw detection device. A slider is slidably inserted into a groove, and the detection component is used to contact and inspect the weld seam of a cylindrical pipe. This addresses the problem of the limited application range of flaw detection devices. In practical use, ultrasonic waves have poor air propagation ability, requiring the use of a coupling agent to fill the gap between the probe and the workpiece. If the weld surface has spatter, scale, pits, etc., caused by welding work, the adhering spatter will increase the distance between the weld and the probe. Applying coupling agent may cause air bubbles in the pits, affecting the flaw detection accuracy. Therefore, this invention provides a weld defect detection device. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a weld defect detection device.

[0005] The technical solution adopted to solve the above technical problems is: A weld defect detection device, comprising: The system comprises: a frame having a skeleton; a conveyor comprising a horizontally arranged conveyor belt, on the top surface of which an engine sleeve is placed, and annular arrayed fins arranged on the upper outer wall of the engine sleeve, with welds forming between the fins and the engine sleeve; a pretreatment component comprising an angle adjustment assembly, a drive wheel, and a grinding wheel, wherein the outer circumferential wall of the drive wheel abuts against the outer circumferential wall of the grinding wheel, a coupling agent is embedded in the cavity of the drive wheel, and an overflow hole communicating with the cavity is opened on the circumferential side wall of the grinding wheel; and an ultrasonic flaw detection component comprising a vertical telescopic component, a pressure frame, and an ultrasonic transceiver probe, wherein a robotic arm is mounted at the lower end of the vertical telescopic component, the ultrasonic transceiver probe is mounted at the lower end of the robotic arm, and the pressure frame is slidably sleeved on the outside of the vertical telescopic component by a tension spring, with the free end of the pressure frame extending directly above the engine sleeve; Before flaw detection, the angle adjustment component centers the grinding wheel between the outer wall of the engine sleeve and the vertical side wall of the fin. The grinding wheel grinds the weld and applies coupling agent to the weld surface. During flaw detection, the vertical telescopic component drives the pressure frame to descend and press the engine sleeve, and the robotic arm drives the ultrasonic transceiver probe to move close to the weld.

[0006] Furthermore, the frame is equipped with two driving components for the pre-processed part. The frame is equipped with a shifting component that drives the engine sleeve to rotate, corresponding to the positions of the ultrasonic flaw detector and the pre-processed part. The driving component includes a middle plate, which is connected to the frame through a servo electric cylinder one. The middle plate is connected to two horizontally symmetrical clamping components through a servo electric cylinder two. The servo electric cylinder one and the servo electric cylinder two are perpendicular to each other.

[0007] Through the above technical solution, the engine sleeve has multiple fins that need to be processed continuously. During grinding, servo cylinder one extends to drive two clamping parts closer to the engine sleeve, and servo cylinder two then drives the two clamping parts closer to each other to clamp the engine sleeve in the center, ensuring that the engine sleeve will not shift or tilt under pressure during the grinding process. After the weld seam of one fin is processed, the drive component drives the clamping parts to move and loosen the engine sleeve, while the shifting component drives the engine sleeve to rotate, so that the adjacent fins are close to the pre-processing part for processing. After the engine sleeve rotates one revolution, servo cylinder one can shorten to move the clamping parts far away from the conveying component, making it convenient for the engine sleeve to move horizontally to the ultrasonic flaw detection part.

[0008] Furthermore, the clamping member has a contact arc surface on the side facing the engine sleeve, and a collection groove is opened on the top surface of the clamping member, with a waste discharge pipe installed at the lowest point of the collection groove.

[0009] Through the above technical solution, since the outer wall of the engine sleeve is not perfectly round and its overall thickness is relatively thin, in order to avoid deformation under pressure, the contact arc surface of the clamping part is designed to conform to the arc surface of the engine sleeve. This will not cause local dents in the engine sleeve and ensure stable contact. The collection tank can receive the coupling agent flowing down from the upper weld position, avoiding contamination of the lower outer wall of the engine sleeve and the transmission parts. After recycling, it can be collected centrally through the waste pipe, filtered and purified, and then reused, ensuring the cleanliness of the equipment itself and reducing abnormal waste of coupling agent.

[0010] Furthermore, the drive unit also includes a linear module one, a linear module two is installed at one end of the linear module one, a linear module three is installed on the vertical side wall of the linear module two, and the pretreatment component is installed on the side of the linear module three facing the engine sleeve.

[0011] Through the above technical solution, the pretreatment component needs to move with multiple degrees of freedom to fully cover the weld seams on both sides of the fin. Linear module one can move the pretreatment component closer to and away from the vertical outer wall of the engine sleeve to adapt to the radius change of the engine sleeve along the height direction. Linear module three moves the pretreatment component up and down so that the pretreatment component can grind and apply coupling agent to the entire weld seam from top to bottom. Linear module two moves the pretreatment component up and down and can reposition the pretreatment component to process the weld seams on the left and right sides of the fin.

[0012] Furthermore, the angle adjustment component includes a slide block, which is assembled and connected to the linear module three. A swing seat is connected to the middle of the slide block through a swing driver. A bracket is hinged to the lower end of the swing seat, and the bracket is connected to the swing seat through a telescopic cylinder.

[0013] With the above technical solution, the fins closest to the pre-treated part will be parallel to the pre-treated part. At this time, if the grinding wheel is directly close to the engine sleeve, it will interfere with the fins. Therefore, the swing drive first drives the swing seat to rotate. After the grinding wheel and the fins are at a 30-degree or 45-degree angle, the grinding wheel will not be obstructed when it approaches the weld. In addition, the extension of the telescopic cylinder can swing and tilt the bracket towards the engine sleeve, so that the grinding wheel is pressed against the weld position, improving the grinding efficiency.

[0014] Furthermore, the lower end of the telescopic cylinder is hinged to the swing seat, the top of the telescopic cylinder is fitted with an outer sleeve, an inner rod is inserted into the top of the outer sleeve, a sensor is installed on the bottom inner side of the inner rod, and a spring is installed between the sensor and the inner rod.

[0015] Through the above technical solution, because of the thin-walled structure of the engine sleeve, if the grinding wheel applies too much pressure to the weld, it will lead to a decrease in the smoothness of the weld after grinding, or even cause the weld to crack. Therefore, after the telescopic cylinder extends, it will compress the spring, and the spring will cause the grinding wheel to press the weld tightly. The pressing force can be monitored in real time by a sensor so that the compression degree of the spring is within the control range, and the pressure on the weld is more stable.

[0016] Furthermore, the grinding wheel has a protruding abrasive ring in the middle, and the drive wheel has two contact surfaces with opposite inclination directions on the inclined surface of the grinding wheel.

[0017] With the above technical solution, since the angle between the fin and the engine sleeve is 90 degrees and the weld is located at the inside corner, the grinding wheel is designed as a flat spindle shape, which can form a small-angle annular protrusion. The grinding is then performed at this position to obtain a grinding ring that can quickly grind the weld without contacting the fin and the engine sleeve. At the same time, the first contact surface and the second contact surface will clamp the inclined surface of the grinding wheel, avoiding the transmission of rotational driving force at the position of the grinding ring, which can prevent slippage and ensure the smooth rotation of the grinding wheel.

[0018] Furthermore, the drive wheel is provided with an annular groove corresponding to the abrasive ring, the overflow port is opened in the annular groove, and a brush is installed in the middle of the annular groove, the brush being in abutting contact with the abrasive ring.

[0019] Through the above technical solution, during the grinding of the weld, the annular groove is filled with coupling agent to clean the grinding ring. The debris generated during grinding will enter the annular groove and flow downward with the coupling agent to detach from the grinding wheel. The flowing coupling agent can also effectively cool the grinding area of ​​the grinding ring, avoiding abnormal wear of the grinding ring caused by continuous grinding. Moreover, the brush bristles will quickly push the coupling agent onto the grinding ring and sweep away the debris in the grinding ring, keeping the grinding ring clean and efficiently grinding the weld, avoiding debris affecting the grinding effect of the weld.

[0020] Furthermore, an end sleeve is installed on the free end of the pressure frame, and a blind hole is opened at the lower end of the end sleeve. A ball bearing that mates with the outer wall of the top end of the engine sleeve is installed on the end sleeve at the vertical inner wall position of the blind hole.

[0021] With the above technical solution, in order to ensure the stability of the engine sleeve position during the weld flaw detection stage, the end sleeve will always be fitted on the top of the engine sleeve during the flaw detection stage, including when the engine sleeve is driven to rotate. This ensures that the engine sleeve will not move laterally relative to the ultrasonic flaw detection part. After the engine sleeve rotates and completes the fin repositioning, the weld can be flaw detected immediately without repositioning, and the flaw detection operation speed is fast.

[0022] Furthermore, the conveyor also includes two rollers, the conveyor belt is sleeved between the two rollers, the conveyor belt has a retaining strip installed on the side facing the rollers that is perpendicular to the forward direction of the conveyor belt, the outer circumference of the rollers has a retaining groove that cooperates with the retaining strip, the conveyor belt has a side strip installed on the side facing the rollers that is parallel to the forward direction of the conveyor belt, and the outer circumference of the rollers has a limiting groove that cooperates with the side strip.

[0023] With the above technical solution, when the engine sleeve is horizontally repositioned, the roller drives the conveyor belt to rotate. During the rotation of the conveyor belt, the clamping strip can prevent the roller and the conveyor belt from slipping, ensuring high displacement accuracy of the engine sleeve. When the engine sleeve is made of steel or other magnetic materials, the clamping strip uses permanent magnets, which can attract the engine sleeve above and prevent the engine sleeve from tipping over. At the same time, the side strip can strengthen the edge of the conveyor belt, reduce the sinking of the conveyor belt under pressure, and ensure the stability of the engine sleeve.

[0024] The beneficial effects of this invention are as follows: (1) The present invention, through the setting of frame, conveyor, pretreatment component and ultrasonic flaw detection component, before flaw detection, in order to ensure the flatness of the weld position, uses the grinding wheel of the pretreatment component to grind the weld to obtain a flat weld surface, and uses the centrifugal force of the grinding wheel to throw the coupling agent onto the weld to fill the fine grooves of the weld, so that when ultrasonic flaw detection is performed later, the ultrasonic transceiver probe and the weld are compensated by the coupling agent, and the air bubbles in the weld grooves affect the flaw detection effect; (2) Through the optimization of the pretreatment components, the active wheel power source drives the grinding wheel to rotate. The grinding wheel extends horizontally and can be inserted into the inside corner between the engine sleeve and the fin. The grinding wheel is parallel to the weld. When the grinding wheel is grinding, it prevents the fin from interfering with each other. During grinding, the coupling agent can clean the debris on the surface of the grinding wheel and cool it down. Moreover, the coupling agent that continuously washes the weld can ensure the cleanliness of the weld and the weld surface and prevent solid residues in the coupling agent from affecting the flaw detection accuracy. Attached Figure Description

[0025] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the frame of the present invention in a semi-sectional state; Figure 3 yes Figure 2 Enlarged view of point a in the middle; Figure 4 This is a schematic diagram showing the positions of the driving component, pretreatment component, and clamping component of the present invention. Figure 1 ; Figure 5 This is a schematic diagram showing the positions of the driving component, pretreatment component, and clamping component of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the pretreatment component and its connected driving component of the present invention. Figure 7 This is a schematic diagram of the cut of the pre-processed component of the present invention; Figure 8 This is a cross-sectional schematic diagram of the telescopic cylinder and its connected components in the pretreatment part of the present invention; Figure 9 This is a schematic diagram of the structure of the engine sleeve of the present invention; Figure 10 This is a schematic diagram showing the position between the ultrasonic flaw detector and the engine sleeve of the present invention; Figure 11 yes Figure 10 Enlarged view of point b in the middle; Figure 12 This is a schematic diagram showing the disassembled transmission component of the present invention.

[0026] Reference numerals: 1. Frame; 11. Skeleton; 2. Conveying component; 21. Roller; 22. Conveyor belt; 23. Clip; 24. Slot; 25. Side strip; 26. Limiting slot; 27. Support plate; 3. Engine sleeve; 31. Fin; 32. Weld; 4. Driving component; 41. Crossbar; 42. Mounting base; 43. Servo cylinder one; 44. Servo cylinder two; 45. Middle plate; 46. Linear module one; 47. Linear module two; 48. Linear module three; 5. Ultrasonic flaw detector; 51. Vertical telescopic component; 52. Robotic arm; 521. Turntable; 522. Swing joint one; 523. Support arm; 524. Swing joint two; 53. Press frame; 53 1. End sleeve; 532. Tension spring; 54. Ultrasonic transceiver probe; 6. Pre-treatment component; 61. Slide; 62. Swing driver; 63. Swing seat; 64. Bracket; 641. Cover; 65. Telescopic cylinder; 651. Outer sleeve; 652. Inner rod; 653. Spring; 654. Sensor; 66. Drive wheel; 661. Cavity; 662. Ring groove; 663. Contact surface one; 664. Contact surface two; 665. Overflow hole; 67. Grinding wheel; 671. Frosted ring; 68. Conveying pipe; 69. Brush bristles; 7. Clamping component; 71. Contact arc surface; 72. Collection groove; 8. Positioning component; 81. Telescopic rod; 82. Guide wheel; 83. Drive wheel. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0028] like Figure 1 - Figure 12As shown, this embodiment provides a weld defect detection device. During the inspection of weld 32, the surface of weld 32 contains spatter, oxide scale, pits, etc., caused by welding work. When applying coupling agent before ultrasonic testing, residual air bubbles are easily generated in the recessed areas. Oxide scale also interferes with the ultrasonic penetration depth. Therefore, to ensure the accuracy of ultrasonic testing, a specific configuration is provided, including: A frame 1 has a skeleton 11, which is constructed of welded steel pipes to provide the required installation space. The hollowed-out parts of the skeleton 11 are decorated with decorative panels, making the equipment neat and beautiful. One delivery item 2, see reference Figure 2 and Figure 12 The conveyor 2 includes a horizontally arranged conveyor belt 22. The conveyor belt 22 is made of a flexible chain plate and can be used for cyclic feeding. An engine sleeve 3 is placed on the top surface of the conveyor belt 22. When the conveyor belt 22 rotates, it can transport the engine sleeve 3 from right to left. Engine sleeve 3, refer to Figure 9 The engine sleeve 3 is a cylindrical structure that is narrow at the top and wide at the bottom. On the outer wall of the hollow thin-walled structure, there are fins 31 arranged in a ring array. During production, the triangular fins 31 are welded one by one to the outer wall of the engine sleeve 3 using welding equipment. Therefore, a vertical weld 32 is formed between the fins 31 and the engine sleeve 3. Pre-treatment component 6, refer to Figure 4 and Figure 7 The pretreatment component 6 includes an angle adjustment assembly, a drive wheel 66, and a grinding wheel 67. The angle adjustment assembly is used to change the tilt angle of the grinding wheel 67. The outer circumferential wall of the drive wheel 66 is in abutting contact with the outer circumferential wall of the grinding wheel 67. The drive wheel 66 is directly connected to a motor to provide rotational driving force for the grinding wheel 67. The cavity 661 of the drive wheel 66 contains a coupling agent. The circumferential side wall of the grinding wheel 67 has an overflow hole 665 that communicates with the cavity 661. The coupling agent flows out through centrifugal force when the drive wheel 66 rotates and is applied to the weld 32 position when the grinding wheel 67 grinds the engine sleeve 3. This is used to compensate for the gap between the ultrasonic transceiver probe 54 and the engine sleeve 3 in subsequent flaw detection operations, ensuring smooth flaw detection. An ultrasonic flaw detector part 5, as referenced Figure 11 The ultrasonic flaw detection component 5 includes a vertical telescopic component 51, a pressure frame 53, and an ultrasonic transceiver probe 54. A robotic arm 52 is installed at the lower end of the vertical telescopic component 51, and the ultrasonic transceiver probe 54 is installed at the lower end of the robotic arm 52. The robotic arm 52 can drive the ultrasonic transceiver probe 54 to adjust its angle. The pressure frame 53 is slidably sleeved on the outside of the vertical telescopic component 51 through a tension spring 532. The free end of the pressure frame 53 extends to the top of the engine sleeve 3, which can center and limit the engine sleeve 3.

[0029] The working principle of this embodiment is as follows: Before flaw detection, the engine sleeve 3 is transported to the pre-treatment component 6 for alignment. At this time, the engine sleeve 3 is rotated so that one fin 31 faces the pre-treatment component 6. The angle adjustment assembly causes the grinding wheel 67 to rotate, forming a 45-degree angle with the facing fin 31. At this point, the grinding wheel 67 is centered between the outer wall of the engine sleeve 3 and the vertical side wall of the fin 31, avoiding interference between the fin 31 and the grinding wheel 67. The drive wheel 66 drives the grinding wheel 67 to rotate. The drive wheel 66 and the motor are relatively far from the engine sleeve 3, ensuring that the thickness at the position of the grinding wheel 67 is small. The grinding wheel 67 is smoothly inserted into the inside corner between the fin 31 and the engine sleeve 3. The rotation plane of the grinding wheel 67 coincides with the straight line where the weld 32 is located. That is, the tangent of the outer circumference of the grinding wheel 67 is parallel to the weld 32. The grinding wheel 67 can directly contact the weld 32. The two pre-treatment parts 6 are used for symmetrical grinding from front to back, which can prevent the engine sleeve 3 from overturning. During the grinding process, the drive wheel 66, which is the power source for the rotation of the grinding wheel 67, will continuously provide coupling agent and apply the coupling agent to the surface of the weld 32 during the grinding process of the grinding wheel 67 on the weld 32. During flaw detection, the vertical telescopic component 51 extends, driving the pressure frame 53 downward to press the engine sleeve 3, ensuring the engine sleeve 3 is centered and stable. Subsequently, the vertical telescopic component 51 continues to extend to its limit position. At this time, the turntable 521 of the robotic arm 52 drives the lower swing joint 522 to rotate. The swing joint 522 can drive the support arm 523 to swing up and down. The swing joint 524 at the lower end of the support arm 523 can drive the ultrasonic transceiver probe 54 to swing up and down. Through the multi-joint linkage of the robotic arm 52, the end of the ultrasonic transceiver probe 54 is driven to avoid the fins 31 and the outer wall of the engine sleeve 3 and directly press against the weld 32. As the ultrasonic transceiver probe 54 moves from top to bottom, the flaw detection work of the entire weld 32 can be carried out. After the flaw detection of one fin 31 is completed, the engine sleeve 3 rotates under the limit of the pressure frame 53, so that the other fin 31 is aligned with the ultrasonic transceiver probe 54, and continuous flaw detection operations can be carried out.

[0030] In a further embodiment, the engine sleeve 3 has multiple fins 31 that require continuous processing, referring to... Figure 2 and Figure 3The frame 11 is equipped with two driving components 4 for the pre-processed part 6. The driving component 4 includes a middle plate 45. The middle plate 45 is connected to the frame 11 through a servo electric cylinder 43. The end of the servo electric cylinder 43 is provided with a mounting seat 42. The mounting seat 42 is U-shaped and is clamped on the frame 11 and tightened by bolts. It is supported by a crossbar 41 to reduce the radial force on the servo electric cylinder 43. The middle plate 45 is connected to two horizontally symmetrical clamping components 7 through a servo electric cylinder 44. The servo electric cylinder 43 and the servo electric cylinder 44 are perpendicular to each other. The servo electric cylinder 43 extends and drives the two clamping components 7 to approach the engine sleeve 3. The servo electric cylinder 44 then drives the two clamping components 7 to approach each other and clamp the engine sleeve 3 in the center, ensuring that the engine sleeve 3 will not shift or tilt under pressure during the grinding process. After the weld 32 of one fin 31 is processed, the driving component 4 drives the clamping component 7 to move and release the engine sleeve 3. Please refer to Figure 3 The frame 11 is equipped with a shifting component 8 for driving the rotation of the engine sleeve 3 at the positions corresponding to the ultrasonic flaw detection component 5 and the pretreatment component 6. The shifting component 8 includes a telescopic rod 81. When the telescopic rod 81 is extended, the drive wheel 83 can be pressed against the outer wall of the engine sleeve 3. At this time, the two guide wheels 82 on both sides will press against the outer wall of the engine sleeve 3 on both sides of the drive wheel 83 to center and limit the movement to prevent the engine sleeve 3 from being squeezed and moved laterally. The rotation of the drive wheel 83 can drive the engine sleeve 3 to rotate and shift the fins 31. The drive wheel 83 uses a servo motor as a power source to ensure that the rotation angle is controllable and highly accurate, so that the fins 31 can approach the position of the pretreatment component 6 one by one for processing. After the engine sleeve 3 rotates one revolution, the servo cylinder 43 can shorten so that the clamping component 7 is significantly away from the conveyor 2, completely avoiding the conveyor 2, so that the engine sleeve 3 can move horizontally to the position of the ultrasonic flaw detection component 5. Similarly, when inspecting weld 32, the shifting component 8 drives the engine sleeve 3 to rotate, which allows for sequential inspection of all fins 31, resulting in a high degree of automation.

[0031] In a further embodiment, because the outer wall of the engine sleeve 3 is not perfectly circular and its overall thickness is relatively thin, in order to avoid deformation under pressure, refer to Figure 4 The clamping member 7 has a contact arc surface 71 on the side facing the engine sleeve 3. The contact arc surface 71 of the clamping member 7 is designed to conform to the arc surface of the engine sleeve 3, preventing localized concavity of the engine sleeve 3 and ensuring stable contact. (Refer to...) Figure 5 The clamping member 7 has a collection groove 72 on its top surface. The collection groove 72 can receive the coupling agent flowing down from the upper weld 32 position, avoiding contamination of the lower outer wall of the engine sleeve 3 and the transmission member 2. A waste discharge pipe is installed at the lowest point of the collection groove 72. After recycling, it can be collected in a centralized manner through the waste discharge pipe, filtered and purified, and then reused to ensure the cleanliness of the equipment itself and reduce abnormal waste of coupling agent.

[0032] In a further embodiment, the pretreatment component 6 needs to fully cover the weld seams 32 on both sides of the fin 31 and requires multi-degree-of-freedom movement. A driving structure is disclosed, referring to... Figure 5 and Figure 6 The drive unit 4 also includes a linear module 1 46, a linear module 2 47 installed at the end of the linear module 1 46, and a linear module 3 48 installed on the vertical side wall of the linear module 2 47. The pretreatment component 6 is installed on the side of the linear module 3 48 facing the engine sleeve 3. The linear module 1 46 can drive the pretreatment component 6 to move closer to and away from the vertical outer wall of the engine sleeve 3 to adapt to the radius change of the engine sleeve 3 along the height direction. The linear module 3 48 drives the pretreatment component 6 to move up and down so that the pretreatment component 6 can grind and apply coupling agent to the entire weld 32 from top to bottom. The linear module 2 47 drives the pretreatment component 6 to move up and down, which can reposition the pretreatment component 6 so as to process the weld 32 on the left and right sides of the fin 31.

[0033] In a further embodiment, refer to Figure 6 The angle adjustment component includes a slide block 61, which is assembled and connected to the linear module 3 48. A swing block 63 is connected to the middle of the slide block 61 via a swing driver 62. A bracket 64 is hinged to the lower end of the swing block 63. The bracket 64 and the swing block 63 are connected via a telescopic cylinder 65. The swing driver 62 first drives the swing block 63 to rotate. After the grinding wheel 67 and the fin 31 form a 30-degree or 45-degree angle, the grinding wheel 67 will not be obstructed when it approaches the weld seam 32. Furthermore, the telescopic cylinder 65 extends, which can swing and tilt the bracket 64 towards the engine sleeve 3, so that the grinding wheel 67 is pressed against the weld seam 32, improving the grinding efficiency. At this time, even if the fin 31 closest to the pre-treatment part 6 is parallel to the pre-treatment part 6, if the grinding wheel 67 rotates and then approaches the engine sleeve 3, it will not interfere with the fin 31, ensuring smooth grinding.

[0034] In a further embodiment, because of the thin-walled structure of the engine sleeve 3, to ensure lightweighting, it is generally between half a millimeter and one millimeter thick. If the grinding wheel 67 applies too much pressure to the weld 32, it will cause the smoothness of the weld 32 to decrease after grinding, and may even cause the engine sleeve 3 to dent and crack the weld 32. Therefore, the lower end of the telescopic cylinder 65 is hinged to the swing seat 63, the top of the telescopic cylinder 65 is equipped with an outer sleeve 651, the top of the outer sleeve 651 is inserted with an inner rod 652, the bottom of the inner side of the inner rod 652 is equipped with a sensor 654, and a spring 653 is installed between the sensor 654 and the inner rod 652. When cylinder 65 extends, it compresses spring 653, which in turn causes grinding wheel 67 to press against weld 32. The pressing force can be monitored in real time by sensor 654, which is a pressure sensor, to ensure that the compression of spring 653 is within a controlled range. If sensor 654 detects that the pressure transmitted from spring 653 to inner rod 652 is too high and exceeds a threshold, telescopic cylinder 65 can shorten to reduce the pressure. Conversely, if sensor 654 detects that the pressure is too low and below the threshold, telescopic cylinder 65 can extend to increase the pressure. This real-time adjustment of the pressure of grinding wheel 67 on weld 32 ensures a good grinding effect.

[0035] In a further embodiment, because the angle between the fin 31 and the engine sleeve 3 is ninety degrees, and the weld 32 is located at an inside corner, therefore, referring to... Figure 6 By designing the grinding wheel 67 into a flat, spindle-shaped form, a small-angle annular protrusion can be created. A sanding treatment is then applied to this position to obtain a sanding ring 671 that can quickly grind the weld seam 32 without contacting the fins 31 and the engine sleeve 3. The drive wheel 66 has two contact surfaces, 663 and 664, with opposite inclination directions on the inclined surface of the grinding wheel 67. When the drive wheel 66 presses against the grinding wheel 67, the contact surfaces 663 and 664 will clamp and contact the inclined surface of the grinding wheel 67, preventing slippage and ensuring the smooth rotation of the grinding wheel 67. This avoids transmitting rotational driving force to the position of the sanding ring 671 and also ensures that the sanding ring 671 will not contact the drive wheel 66, thus preventing abnormal wear of the sanding ring 671.

[0036] In a further embodiment, during the grinding of weld 32, refer to Figure 7The drive wheel 66 has an annular groove 662 corresponding to the grinding ring 671. An overflow hole 665 is located in the annular groove 662. Grinding debris enters the annular groove 662, which is filled with a coupling agent to clean the grinding ring 671. The debris flows downwards with the coupling agent and detaches from the grinding wheel 67. The flowing coupling agent also effectively cools the grinding area of ​​the grinding ring 671, preventing abnormal wear caused by continuous grinding. Furthermore, a brush bristle 69 is installed in the middle of the annular groove 662. The length of the brush bristle 69 is greater than the depth of the annular groove 662. The brush bristle 69 presses against the grinding ring 671, quickly pushing the coupling agent onto the grinding ring 671 and sweeping away debris, keeping the grinding ring 671 clean. This allows for efficient grinding of the weld 32, preventing debris from affecting the grinding effect of the weld 32. (Refer to...) Figure 6 The coupling agent is continuously delivered to the cavity 661 through the delivery pipe 68 and continuously overflows through the overflow hole 665. Because there is a cover 641 on the outside of the drive wheel 66, and the cover 641 has an opening facing the grinding wheel 67, the coupling agent will not be thrown around randomly. It can only contact the grinding wheel 67 through the opening, so that the coupling agent can continuously wash the weld 32 through the rotation of the grinding wheel 67. This can ensure that the weld 32 and the coupling agent on the surface are cleaner after grinding, so that subsequent ultrasonic flaw detection can be performed directly.

[0037] In a further embodiment, to ensure the stability of the engine sleeve 3 position during the weld inspection stage, refer to Figure 11 An end sleeve 531 is installed on the free end of the pressure frame 53. A blind hole is opened at the lower end of the end sleeve 531. A ball bearing that mates with the outer wall of the top of the engine sleeve 3 is installed on the vertical inner wall of the blind hole. The end sleeve 531 will always be fitted on the top of the engine sleeve 3 during the flaw detection stage, including when the engine sleeve 3 is driven to rotate. This ensures that the engine sleeve 3 will not move laterally relative to the ultrasonic flaw detection component 5. The position of the engine sleeve 3 remains unchanged, and only the fins 31 are displaced. After the engine sleeve 3 rotates and completes the replacement of the fins 31, the replacement component 8 has high rotation accuracy. The new fins 31 are directly rotated to the position of the old fins 31. The ultrasonic transceiver probe 54 can be directly reset without repositioning. Flaw detection of the weld 32 of the fin 31 can be performed immediately. The flaw detection operation is fast.

[0038] In a further embodiment, when performing the horizontal transposition of the engine sleeve 3, refer to Figure 12The conveyor 2 also includes two rollers 21, one of which is connected to a servo motor via a coupling to drive the conveyor belt 22 to rotate. The conveyor belt 22 is fitted between the two rollers 21, keeping it taut. Simultaneously, a retaining strip 23 perpendicular to the forward direction of the conveyor belt 22 is installed on the side of the conveyor belt 22 facing the rollers 21. A groove 24 is formed on the outer circumference of the roller 21 to mate with the retaining strip 23. During the rotation of the conveyor belt 22, the retaining strip 23 prevents slippage between the rollers 21 and the conveyor belt 22, ensuring high displacement accuracy of the engine sleeve 3. It should be noted that when the engine sleeve 3 is made of iron alloy, steel, or other materials that can be magnetized and attracted by permanent magnets, the retaining strip 23 should be made of a permanent magnet material. The conveyor belt 22 is designed to hold the engine sleeve 3 above it as it moves, preventing it from tipping over. Furthermore, the conveyor belt 22 has a side strip 25 parallel to its forward direction installed on the side facing the roller 21. The roller 21 has a limiting groove 26 on its outer circumference that mates with the side strip 25. The side strip 25 strengthens the edge of the conveyor belt 22, reducing pressure and ensuring the stability of the engine sleeve 3. A support plate 27 can be installed below the upper layer of the conveyor belt 22 to support it. When the engine sleeve 3 presses down on the conveyor belt 22, the force on the conveyor belt 22 is distributed to prevent it from sinking, thus accommodating the heavier engine sleeve 3.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A weld defect detection device, characterized in that, include: The frame (1) has a skeleton (11). The conveyor (2) includes a horizontally arranged conveyor belt (22), an engine sleeve (3) is placed on the top surface of the conveyor belt (22), and fins (31) arranged in an annular array are installed on the upper outer wall of the engine sleeve (3), and a weld (32) is formed between the fins (31) and the engine sleeve (3). The pretreatment component (6) includes an angle adjustment assembly, a drive wheel (66) and a grinding wheel (67). The outer circumferential wall of the drive wheel (66) is in abutting contact with the outer circumferential wall of the grinding wheel (67). The cavity (661) of the drive wheel (66) contains a coupling agent. The circumferential sidewall of the grinding wheel (67) is provided with an overflow hole (665) communicating with the cavity (661). The ultrasonic flaw detector (5) includes a vertical telescopic component (51), a pressure frame (53) and an ultrasonic transceiver probe (54). A robotic arm (52) is installed at the lower end of the vertical telescopic component (51), and the ultrasonic transceiver probe (54) is installed at the lower end of the robotic arm (52). The pressure frame (53) is slidably sleeved on the outside of the vertical telescopic component (51) by a tension spring (532). The free end of the pressure frame (53) extends to the top of the engine sleeve (3). The angle adjustment component places the grinding wheel (67) in the center between the outer wall of the engine sleeve (3) and the vertical side wall of the fin (31). The grinding wheel (67) grinds the weld (32) and applies coupling agent to the surface of the weld (32). The vertical telescopic component (51) drives the pressure frame (53) to descend and press the engine sleeve (3). The robotic arm (52) drives the ultrasonic transceiver probe (54) to move close to the weld (32).

2. The weld defect detection device according to claim 1, characterized in that, The frame (11) has two driving components (4) installed on the pre-treatment component (6). The frame (11) has a shifting component (8) for driving the engine sleeve (3) to rotate, respectively, at the positions corresponding to the ultrasonic flaw detector (5) and the pre-treatment component (6). The driving component (4) includes a middle plate (45). The middle plate (45) is connected to the frame (11) through a servo electric cylinder one (43). The middle plate (45) is connected to two horizontally symmetrical clamping components (7) through a servo electric cylinder two (44). The servo electric cylinder one (43) and the servo electric cylinder two (44) are perpendicular to each other.

3. The weld defect detection device according to claim 2, characterized in that, The clamping member (7) has a contact arc surface (71) on the side facing the engine sleeve (3), and a collection groove (72) is opened on the top surface of the clamping member (7). A waste discharge pipe is installed at the lowest point of the collection groove (72).

4. The weld defect detection device according to claim 2, characterized in that, The drive unit (4) also includes a linear module one (46), a linear module two (47) is installed at the end of the linear module one (46), a linear module three (48) is installed on the vertical side wall of the linear module two (47), and the pretreatment unit (6) is installed on the side of the linear module three (48) facing the engine sleeve (3).

5. The weld defect detection device according to claim 4, characterized in that, The angle adjustment component includes a slide (61), which is assembled and connected to the linear module three (48). The middle part of the slide (61) is connected to a swing seat (63) through a swing driver (62). The lower end of the swing seat (63) is hinged to a bracket (64), and the bracket (64) and the swing seat (63) are connected through a telescopic cylinder (65).

6. The weld defect detection device according to claim 5, characterized in that, The lower end of the telescopic cylinder (65) is hinged to the swing seat (63). The top of the telescopic cylinder (65) is fitted with an outer sleeve (651). An inner rod (652) is inserted into the top of the outer sleeve (651). A sensor (654) is installed on the bottom inner side of the inner rod (652). A spring (653) is installed between the sensor (654) and the inner rod (652).

7. The weld defect detection device according to claim 1, characterized in that, The grinding wheel (67) has a protruding abrasive ring (671) in the middle. The drive wheel (66) has a contact surface one (663) and a contact surface two (664) with opposite inclination directions on the inclined surface of the grinding wheel (67).

8. The weld defect detection device according to claim 7, characterized in that, The drive wheel (66) is provided with an annular groove (662) corresponding to the abrasive ring (671), the overflow hole (665) is opened at the annular groove (662), and a brush bristle (69) is installed in the middle of the annular groove (662), and the brush bristle (69) is in abutting contact with the abrasive ring (671).

9. The weld defect detection device according to claim 1, characterized in that, The pressure frame (53) has an end sleeve (531) installed at its free end. The end sleeve (531) has a blind hole at its lower end. The end sleeve (531) is equipped with a ball bearing that mates with the outer wall of the top end of the engine sleeve (3) at the vertical inner wall of the blind hole.

10. The weld defect detection device according to claim 9, characterized in that, The conveyor (2) also includes two rollers (21), and the conveyor belt (22) is sleeved between the two rollers (21). A retaining strip (23) perpendicular to the forward direction of the conveyor belt (22) is installed on the side of the conveyor belt (22) facing the rollers (21). A groove (24) that cooperates with the retaining strip (23) is opened on the outer circumference of the rollers (21). A side strip (25) parallel to the forward direction of the conveyor belt (22) is installed on the side of the conveyor belt (22) facing the rollers (21). A limiting groove (26) that cooperates with the side strip (25) is opened on the outer circumference of the rollers (21).

Images