A weld defect detection device

Abstract

The application discloses a kind of weld defect detection devices, belong to ultrasonic weld flaw detection technical field, the weld defect detection device, including rack, the rack has framework;Conveying part, the conveying part includes horizontally arranged conveying belt, engine sleeve is placed on the top surface of conveying belt, the outer wall of engine sleeve upper portion is equipped with annular array arrangement fin, and weld is formed between fin and engine sleeve.The application is provided by rack, conveying part, pretreatment piece and ultrasonic flaw detection piece, before carrying out flaw detection, to ensure the flatness of weld position, using the polishing wheel of pretreatment piece to polish weld, to obtain the flat surface of weld, and using the centrifugal force of polishing wheel to throw coupling agent to weld, to coat the fine groove of weld, so that ultrasonic transceiver probe is coupled between weld during subsequent ultrasonic flaw detection, and weld groove is compensated by coupling agent, to prevent the effect of flaw detection by bubble in weld groove.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of ultrasonic weld seam flaw detection, and particularly relates to a weld seam defect detection device. BACKGROUND

[0002] Ultrasonic weld joint flaw detection is a non-destructive testing technology that uses the propagation characteristics of high-frequency sound waves in materials to detect internal defects in weld seams. Its principle is to emit sound waves from an ultrasonic probe to the weld joint. When the sound waves encounter defects such as cracks and pores, they will be reflected or scattered. By analyzing the echo signals, the position, size and nature of the defects can be determined. This method is widely used in steel structures, pressure vessels, aerospace and other fields, and has the advantages of high sensitivity, fast detection speed and no harm to the human body. In actual operation, direct or oblique sound beam methods are often used, combined with phased array, deep learning and other new technologies to improve detection accuracy and efficiency.

[0003] The existing Chinese patent with publication number CN216718301U discloses an ultrasonic weld seam flaw detection device. The sliding block is in sliding and plug-in cooperation with the sliding groove. The detection assembly is used to adhere to the cylindrical pipe weld seam and detect the weld seam. This solves the problem of small use range of the flaw detection device. In actual use, the ultrasonic wave has poor propagation ability in air, and a coupling agent is needed to fill the gap between the probe and the detected part. If there are spatters, scales and pits on the weld seam surface caused by welding work, the adhered spatters will increase the distance between the weld seam and the probe, and the application of the coupling agent may cause bubbles in the pits, affecting the flaw detection accuracy. In view of this, a weld seam defect detection device is provided. SUMMARY

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

[0005] The technical solution adopted to solve the above technical problems is:

[0006] A weld seam defect detection device comprises:

[0007] Rack, which has a skeleton; conveying part, which includes a horizontal conveying belt, the top surface of which is placed with an engine sleeve, the upper outer wall of which is provided with an annular array of fins, and a weld is formed between the fins and the engine sleeve; pretreatment part, which includes an angle adjustment assembly, a driving wheel and a grinding wheel, the circumferential outer wall of which is in contact with the circumferential outer wall of the grinding wheel, the cavity of the driving wheel is provided with a coupling agent, and the circumferential side wall of the grinding wheel is provided with an overflow hole communicating with the cavity; ultrasonic flaw detection part, which includes a vertical telescopic part, a pressing frame and an ultrasonic transceiver probe, the lower end of the vertical telescopic part is provided with a mechanical arm, the ultrasonic transceiver probe is installed at the lower end of the mechanical arm, and the pressing frame is slidably sleeved on the outside of the vertical telescopic part through a tension spring, and the free end of the pressing frame extends directly above the engine sleeve.

[0008] Before detection, the angle adjustment assembly places 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 the coupling agent to the surface of the weld, and when detecting, the vertical telescopic part drives the pressing frame to press the engine sleeve, and the mechanical arm drives the ultrasonic transceiver probe to move closely to the weld.

[0009] Further, the skeleton is provided with two driving parts for the pretreatment part, and the skeleton is provided with a transposition part for driving the rotation of the engine sleeve corresponding to the positions of the ultrasonic flaw detection part and the pretreatment part, the driving part includes a middle plate, the middle plate is connected to the skeleton through a servo cylinder one, the middle plate is connected to two horizontally symmetrical clamping parts through a servo cylinder two, and the servo cylinder one and the servo cylinder two are perpendicular to each other.

[0010] Through the above technical scheme, the engine sleeve with multiple fins needs to be continuously processed, when grinding, the servo cylinder one is elongated to drive the two clamping parts to approach the engine sleeve, the servo cylinder two drives the two clamping parts to approach each other to clamp the engine sleeve in the middle, ensuring that the engine sleeve does not deviate or tilt during grinding, after the weld of one fin is processed, the driving part drives the clamping part to displace to loosen the engine sleeve, and the transposition part drives the engine sleeve to rotate to make the adjacent fin approach the pretreatment part for processing, after the engine sleeve rotates one round, the servo cylinder one can be shortened to make the clamping part far away from the conveying part, which facilitates the horizontal movement of the engine sleeve to the position of the ultrasonic flaw detection part.

[0011] Further, the clamping part is provided with a contact arc surface towards the engine sleeve, the top surface of the clamping part is provided with a collection groove, and the lowest part of the collection groove is provided with a waste pipe.

[0012] Through the technical scheme, the contact arc surface of the clamping piece is designed as a conformal arc surface of the engine sleeve to avoid local indentation of the engine sleeve and stable contact, the collecting groove can receive the coupling agent flowing from the upper welding seam position to avoid pollution of the lower outer wall of the engine sleeve and the conveying piece, the recovered coupling agent can be collected through the waste pipe and reused after filtration and purification, thereby ensuring the cleanliness of the equipment and reducing abnormal waste of the coupling agent.

[0013] Further, the driving piece further comprises 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 piece is installed on the side of the linear module three facing the engine sleeve.

[0014] Through the technical scheme, the pretreatment piece is used for fully covering the welding seams on both sides of the fin and needs to move with multiple degrees of freedom, the linear module one can drive the pretreatment piece to approach and move away from the vertical outer wall of the engine sleeve, adapt to the radius change of the engine sleeve along the height direction, the linear module three drives the pretreatment piece to move up and down, so that the pretreatment piece polishes and applies the coupling agent to the entire welding seam from top to bottom, and the linear module two drives the pretreatment piece to move up and down, so that the pretreatment piece is transposed to process the welding seams on both sides of the fin.

[0015] Further, the angle adjusting assembly comprises a sliding seat, the sliding seat is assembled and connected with the linear module three, a swing seat is connected with the sliding seat through a swing driver in the middle of the sliding seat, a support is hingedly connected to the lower end of the swing seat, and the support is connected with the swing seat through a telescopic cylinder.

[0016] Through the technical scheme, the fin closest to the pretreatment piece is parallel to the pretreatment piece, at this time, if the grinding wheel directly approaches the engine sleeve, interference with the fin will occur, therefore, the swing driver first drives the swing seat to twist, the grinding wheel is at an angle of thirty degrees or forty-five degrees with the fin, then the grinding wheel approaches the welding seam, and the fin is not hindered, and the telescopic cylinder is elongated, so that the support is swung and inclined towards the engine sleeve, the grinding wheel is pressed on the welding seam position, and the grinding efficiency is improved.

[0017] Further, the telescopic cylinder is hingedly connected with the swing seat at the lower end, an outer sleeve is installed at the top end of the telescopic cylinder, an inner rod is inserted and connected at the top of the outer sleeve, a sensor is installed at the inner side and bottom of the inner rod, and a spring is installed between the sensor and the inner rod.

[0018] Through the technical scheme, because of the thin-wall structure of the engine sleeve, if the pressure applied by the grinding wheel on the weld joint is too large, the smoothness of the weld joint after grinding will decrease, and even the weld joint will crack, therefore, after the telescopic cylinder is elongated, the spring is compressed, and the grinding wheel is pressed against the weld joint through the spring, and the pressing force can be monitored in real time through the sensor, so that the compression degree of the spring is within the control range, and the pressure on the weld joint is more stable.

[0019] Further, the middle part of the grinding wheel is protruded to form a grinding ring, and the driving wheel is provided with contact surface one and contact surface two with opposite inclination directions corresponding to the inclined surface of the grinding wheel.

[0020] Through the technical scheme, because the angle between the fin and the engine sleeve is ninety degrees, and the weld joint is in a reentrant angle, the grinding wheel is designed as a flat shuttle shape, so as to form a small-angle annular protrusion, and the grinding ring is obtained by grinding at the position, which can quickly grind the weld joint without contacting the fin and the engine sleeve, and at the same time, the contact surface one and the contact surface two will contact and grind the inclined surface of the grinding wheel, avoiding the transmission and rotating driving force at the position of the grinding ring, which can prevent slipping and ensure the smooth rotation of the grinding wheel.

[0021] Further, the driving wheel is provided with a ring groove at the position corresponding to the grinding ring, the overflow hole port is opened at the ring groove, and the brush is installed in the middle part of the ring groove.

[0022] Through the technical scheme, during the grinding of the weld joint, the ring groove is full of coupling agent, the grinding ring is cleaned, the debris generated during grinding enters the position of the ring groove, and flows downward with the coupling agent to separate from the grinding wheel, the flowing coupling agent can also effectively cool the grinding position of the grinding ring, avoid abnormal wear of the grinding ring caused by continuous grinding, and the brush can quickly push the coupling agent to the grinding ring position and sweep the debris in the grinding ring down, so that the grinding ring remains clean, the weld joint position is efficiently ground, and the effect of the debris on the grinding of the weld joint is avoided.

[0023] Further, the free end of the pressing frame is provided with an end sleeve, a blind hole is opened at the lower end of the end sleeve, and a ball bearing matched with the top end outer wall of the engine sleeve is installed at the vertical inner wall position of the blind hole.

[0024] Through the technical scheme, in order to ensure the stability of the position of the engine sleeve during the weld joint detection, the end sleeve will always be sleeved on the top end of the engine sleeve during the detection, including when the engine sleeve is driven to rotate, the engine sleeve can be prevented from moving horizontally relative to the ultrasonic detection part, after the engine sleeve is rotated to complete the transposition of the fin, the weld joint can be detected immediately without repositioning, and the detection operation is fast.

[0025] 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.

[0026] 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.

[0027] The beneficial effects of this invention are as follows:

[0028] (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;

[0029] (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

[0030] Figure 1 This is a first-view structural diagram of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the frame of the present invention in a semi-sectional state;

[0032] Figure 3 yes Figure 2 Enlarged view of point a in the middle;

[0033] 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 ;

[0034] Figure 5 is the position between the driving member, the pretreatment member and the clamping member of the present application Figure 2 ;

[0035] Figure 6 is the structure of the pretreatment member and its connected part driving member of the present application

[0036] Figure 7 is the cut view of the pretreatment member of the present application

[0037] Figure 8 is the cut view of the telescopic cylinder and its connected parts in the pretreatment member of the present application

[0038] Figure 9 is the structure of the engine sleeve of the present application

[0039] Figure 10 is the position between the ultrasonic flaw detection member and the engine sleeve of the present application

[0040] Figure 11 is the enlarged view of b in Figure 10

[0041] Figure 12 is the exploded view of the conveying member of the present application

[0042] Reference signs: 1, frame; 11, skeleton; 2, conveying member; 21, roller; 22, conveying belt; 23, clamping strip; 24, clamping groove; 25, edge strip; 26, limiting groove; 27, supporting plate; 3, engine sleeve; 31, fin; 32, welding seam; 4, driving member; 41, cross rod; 42, mounting seat; 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 detection member; 51, vertical telescopic member; 52, mechanical arm; 521, rotary table; 522, swing joint one; 523, supporting arm; 524, swing joint two; 53, pressing frame; 531, end sleeve; 532, tension spring; 54, ultrasonic transceiver probe; 6, pretreatment member; 61, sliding seat; 62, swing driver; 63, swing seat; 64, supporting frame; 641, cover; 65, telescopic cylinder; 651, outer sleeve; 652, inner rod; 653, spring; 654, sensor; 66, driving wheel; 661, cavity; 662, ring groove; 663, contact surface one; 664, contact surface two; 665, overflow hole; 67, polishing wheel; 671, sanding ring; 68, conveying pipe; 69, brush; 7, clamping member; 71, contact arc surface; 72, collecting groove; 8, transposition member; 81, telescopic rod; 82, guide wheel; 83, driving wheel. DETAILED DESCRIPTION

[0043] ​In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0044] As shown in Figure 1 - Figure 12 The present embodiment provides a weld defect detection device. In the flaw detection of the weld 32, there are spatters, scales, pits and the like caused by welding work on the surface of the weld 32. When the coupling agent is applied before ultrasonic flaw detection, residual bubbles are easily generated at the concave position. The scales also interfere with the penetration depth of the ultrasonic wave. Therefore, in order to ensure the accuracy of the ultrasonic flaw detection, a specific configuration is provided, which comprises:

[0045] A rack 1, the rack 1 has a skeleton 11, the skeleton 11 is welded by steel pipes to provide the required installation space, and the skeleton 11 has decorative plates at the hollow positions, so that the equipment is neat and beautiful;

[0046] A conveying member 2, referring to Figure 2 and Figure 12 , the conveying member 2 comprises a horizontal conveying belt 22, the conveying belt 22 is flexible and can perform cyclic feeding. An engine sleeve 3 is placed on the top surface of the conveying belt 22, and the engine sleeve 3 can be conveyed from right to left when the conveying belt 22 rotates;

[0047] The engine sleeve 3, referring to Figure 9 , the engine sleeve 3 has a cylindrical structure with a narrow upper part and a wide lower part. The outer wall of the hollow thin-walled structure is provided with annularly arranged fins 31. The triangular fins 31 are welded on the outer wall of the engine sleeve 3 one by one by a welding device during production. Therefore, a vertical weld 32 is formed between the fins 31 and the engine sleeve 3;

[0048] A pretreatment member 6, referring to Figure 4 and Figure 7 , the pretreatment member 6 comprises an angle adjusting assembly, a driving wheel 66 and a grinding wheel 67. The angle adjusting assembly is used to change the inclination angle of the grinding wheel 67. The circumferential outer wall of the driving wheel 66 is in abutting contact with the circumferential outer wall of the grinding wheel 67. The driving wheel 66 is directly connected to a motor to provide a rotary driving force for the grinding wheel 67. The driving wheel 66 is provided with a cavity 661 in which a coupling agent is placed. The circumferential side wall of the grinding wheel 67 is provided with overflow holes 665 which are in communication with the cavity 661. The coupling agent flows out under the centrifugal force when the driving wheel 66 rotates and is applied to the position of the weld 32 when the grinding wheel 67 grinds the engine sleeve 3. The coupling agent is used to compensate for the gap between the ultrasonic transceiver probe 54 and the engine sleeve 3 in the subsequent flaw detection operation, so as to ensure the smooth progress of the flaw detection;

[0049] An ultrasonic flaw detection member 5, referring to Figure 11The ultrasonic flaw detection device 5 comprises a vertical telescopic member 51, a pressing frame 53 and an ultrasonic transceiver probe 54. The lower end of the vertical telescopic member 51 is provided with a mechanical arm 52, and the ultrasonic transceiver probe 54 is installed at the lower end of the mechanical arm 52. The mechanical arm 52 can drive the ultrasonic transceiver probe 54 to adjust the angle. The pressing frame 53 is slidably sleeved outside the vertical telescopic member 51 through a tension spring 532. The free end of the pressing frame 53 extends to the upper side of the engine sleeve 3, and can center and limit the engine sleeve 3.

[0050] The working principle of the embodiment is as follows:

[0051] Before flaw detection, the engine sleeve 3 is conveyed to face the pretreatment device 6. At this time, the engine sleeve 3 is rotated to make one fin 31 face the pretreatment device 6. The angle adjusting assembly makes the grinding wheel 67 twist to form a forty-five-degree angle with the facing fin 31. At this time, the grinding wheel 67 is centrally arranged between the outer wall of the engine sleeve 3 and the vertical side wall of the fin 31, so as to avoid interference between the fin 31 and the grinding wheel 67. The driving wheel 66 drives the grinding wheel 67 to rotate. The distance between the driving wheel 66 and the motor and the engine sleeve 3 is large, so that the thickness of the position of the grinding wheel 67 is small, and the grinding wheel 67 can be smoothly inserted into the internal 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 circumferential outer wall of the grinding wheel 67 is parallel to the weld 32. The grinding wheel 67 can directly contact the weld 32. The two pretreatment devices 6 are used for symmetrical grinding in front and back, so as to avoid overturning of the engine sleeve 3. During the grinding process, the driving wheel 66 as the rotation power source of the grinding wheel 67 continuously provides the coupling agent, and applies the coupling agent to the surface of the weld 32 during the grinding of the weld 32 by the grinding wheel 67.

[0052] During flaw detection, the vertical telescopic member 51 is elongated to drive the pressing frame 53 to press the engine sleeve 3 downward, so as to ensure that the engine sleeve 3 is centered and stable. Subsequently, the vertical telescopic member 51 is continuously elongated to reach the limit position. At this time, the rotating table 521 of the mechanical arm 52 drives the lower swing joint one 522 to rotate. The swing joint one 522 can drive the supporting arm 523 to swing up and down. The swing joint two 524 at the lower end of the supporting arm 523 can drive the ultrasonic transceiver probe 54 to swing up and down. Through the multi-joint linkage of the mechanical arm 52, the end of the ultrasonic transceiver probe 54 is avoided to directly adhere to the position of the weld 32, avoiding the fin 31 and the outer wall of the engine sleeve 3. With the ultrasonic transceiver probe 54 moving from top to bottom, the flaw detection work of the entire weld 32 can be performed. After the flaw detection of one fin 31 is completed, the engine sleeve 3 is rotated under the limiting of the pressing frame 53 to make another fin 31 align with the ultrasonic transceiver probe 54, so that continuous flaw detection operation can be performed.

[0053] In further embodiments, the engine sleeve 3 has a plurality of fins 31 which need to be continuously processed. Referring to Figure 2 and Figure 3, the skeleton 11 is provided with two driving members 4 for the pretreatment member 6, the driving member 4 comprises a middle plate 45, the middle plate 45 is connected with the skeleton 11 through a servo cylinder one 43, the servo cylinder one 43 is provided with a mounting seat 42 at the end, the mounting seat 42 is in the shape of a Chinese character and is clamped on the skeleton 11 and is pressed through bolts, and is supported through a horizontal rod 41, so that the radial force received by the servo cylinder one 43 is reduced, the middle plate 45 is connected with two clamping members 7 which are horizontally symmetrical through a servo cylinder two 44, the servo cylinder one 43 and the servo cylinder two 44 are perpendicular to each other, the servo cylinder one 43 is elongated to drive the two clamping members 7 to approach the engine sleeve 3, and then the servo cylinder two 44 drives the two clamping members 7 to approach each other to clamp the engine sleeve 3 in the middle, so that the engine sleeve 3 is not deviated or inclined during the polishing process, and after the welding seam 32 of one fin 31 is processed, the driving member 4 drives the clamping member 7 to displace to release the engine sleeve 3;

[0054] Please refer to Figure 3 , the skeleton 11 is provided with a transposition member 8 corresponding to the positions of the ultrasonic flaw detection member 5 and the pretreatment member 6, the transposition member 8 drives the rotation of the engine sleeve 3, the transposition member 8 comprises an extension rod 81, when the extension rod 81 is elongated, the driving wheel 83 can be pressed on the outer wall of the engine sleeve 3, at this time, the two guide wheels 82 on both sides will be pressed on the outer wall of the engine sleeve 3 on both sides of the driving wheel 83, so as to limit the center and prevent the engine sleeve 3 from being squeezed and horizontally moved, and the rotation of the driving wheel 83 can drive the rotation of the engine sleeve 3 to transposition the fin 31, the driving wheel 83 adopts a servo motor as a power source, so as to ensure that the rotation angle is controllable and the precision is high, so that the fin 31 can be processed one by one close to the position of the pretreatment member 6, after the engine sleeve 3 rotates one circle, the servo cylinder one 43 can be shortened to make the clamping member 7 far away from the conveying member 2, so as to completely avoid the conveying member 2, and facilitate the horizontal movement of the engine sleeve 3 to the position of the ultrasonic flaw detection member 5;

[0055] Similarly, when the welding seam 32 is detected, the transposition member 8 drives the rotation of the engine sleeve 3, so that all the fins 31 can be sequentially detected, and the degree of automation is high.

[0056] In further embodiments, because the outer wall of the engine sleeve 3 is not a perfect circle and the overall thickness is relatively thin, in order to avoid deformation under pressure, please refer to Figure 4 , the clamping member 7 is provided with 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 as a conformal arc surface of the engine sleeve 3, so that the engine sleeve 3 is not locally concave and the contact is stable, please refer to Figure 5The top surface of the clamping piece 7 is provided with a collecting groove 72, which can receive the coupling agent flowing from the upper welding seam 32 position to avoid polluting the lower outer wall of the engine sleeve 3 and the conveying piece 2. The lowest part of the collecting groove 72 is provided with a waste pipe. The recovered coupling agent can be collected through the waste pipe, filtered and purified for reuse, ensuring the cleanliness of the equipment and reducing the abnormal waste of the coupling agent.

[0057] In further embodiments, the pretreatment piece 6 is used to cover the welding seam 32 on both sides of the fin 31, which needs to be moved in multiple degrees of freedom. A driving structure is disclosed, which is described with reference to Figure 5 and Figure 6 The driving piece 4 further comprises a linear module one 46, the end of which is provided with a linear module two 47, and the vertical side wall of the linear module two 47 is provided with a linear module three 48. The pretreatment piece 6 is installed on the side of the linear module three 48 facing the engine sleeve 3. The linear module one 46 can drive the pretreatment piece 6 to approach and move away from the vertical outer wall of the engine sleeve 3, adapt to the radius change of the engine sleeve 3 along the height direction, and drive the pretreatment piece 6 to move up and down to polish and apply coupling agent to the entire welding seam 32 from top to bottom. The linear module two 47 drives the pretreatment piece 6 to move up and down, which can change the position of the pretreatment piece 6 to process the welding seam 32 on both sides of the fin 31.

[0058] In further embodiments, with reference to Figure 6 The angle adjusting assembly comprises a sliding seat 61, which is assembled and connected with the linear module three 48. The middle part of the sliding seat 61 is connected with a swing seat 63 through a swing driver 62. The lower end of the swing seat 63 is hinged with a support 64, and the support 64 is connected with the swing seat 63 through a telescopic cylinder 65. The swing driver 62 first drives the swing seat 63 to twist. After the polishing wheel 67 forms an angle of thirty degrees or forty-five degrees with the fin 31, the polishing wheel 67 is close to the welding seam 32 and is not hindered by the fin 31. Moreover, the telescopic cylinder 65 is elongated to swing and tilt the support 64 towards the engine sleeve 3, so that the polishing wheel 67 is pressed on the welding seam 32 position, improving the polishing efficiency. At this time, even if the fin 31 closest to the pretreatment piece 6 is parallel to the pretreatment piece 6, if the polishing wheel 67 twists and then approaches the engine sleeve 3, it will not interfere with the fin 31, ensuring smooth polishing.

[0059] In further embodiments, because the engine sleeve 3 has a thin-walled structure, in order to ensure lightweight, the thickness is generally between half a millimeter and one millimeter. If the polishing wheel 67 exerts excessive pressure on the weld 32, it will cause the smoothness of the polished weld 32 to decrease, and even cause the engine sleeve 3 to sag and cause the weld 32 to crack. Therefore, the lower end of the telescopic cylinder 65 is hinged to the swing seat 63, and the top end of the telescopic cylinder 65 is provided with an outer sleeve 651, the top of the outer sleeve 651 is provided with an inner rod 652, the inner side of the inner rod 652 is provided with a sensor 654, the sensor 654 and the inner rod 652 are provided with a spring 653, and the telescopic cylinder 65 is extended. After the spring 653 is compressed, the polishing wheel 67 is pressed against the weld 32, and the pressing force can be monitored in real time by the sensor 654. The sensor 654 uses a pressure sensor to control the compression of the spring 653. If the sensor 654 detects that the pressure transmitted by the spring 653 to the inner rod 652 exceeds the threshold value, the telescopic cylinder 65 can be shortened to reduce the pressure. When the sensor 654 detects that the pressure is too small and below the threshold value, the telescopic cylinder 65 can be extended to increase the pressure. The pressure of the polishing wheel 67 on the weld 32 is adjusted in real time to ensure good polishing effect.

[0060] In further embodiments, because the angle between the fin 31 and the engine sleeve 3 is ninety degrees, and the weld 32 is at the inside corner, the polishing wheel 67 is designed to be flat and shuttle-shaped, which can form a small angle annular protrusion, and the position is ground to obtain a grinding ring 671 that can quickly polish the weld 32 without contacting the fin 31 and the engine sleeve 3. Figure 6 The contact surface one 663 and the contact surface two 664 of the driving wheel 66 corresponding to the inclined surface of the polishing wheel 67 are provided with opposite inclined directions, and when the driving wheel 66 presses the polishing wheel 67, the contact surface one 663 and the contact surface two 664 will contact the inclined surface of the polishing wheel 67, which can prevent slipping and ensure smooth rotation of the polishing wheel 67, avoid the grinding ring 671 position to transmit rotary driving force, and also ensure that the grinding ring 671 will not contact the driving wheel 66, avoiding abnormal wear of the grinding ring 671.

[0061] In further embodiments, during the polishing of the weld 32, the grinding ring 671 is provided with a plurality of grinding teeth 672, and the grinding teeth 672 are arranged in a spiral shape, which can quickly polish the weld 32 and form a smooth surface. Figure 7, the active wheel 66 corresponds to the sanding ring 671 is provided with a ring groove 662, overflow hole 665 port is opened in the ring groove 662, the debris generated by sanding will enter the ring groove 662 position, ring groove 662 full coupling agent, sanding ring 671 is cleaned, with the coupling agent to flow away from the sanding wheel 67, the flow of coupling agent can also be effective on the sanding ring 671 sanding position cooling, avoid continuous sanding caused by sanding ring 671 abnormal wear, and, the ring groove 662 middle installation has bristle 69, the length of the bristle 69 is greater than the depth of the ring groove 662, the bristle 69 and sanding ring 671 abutting contact, the bristle 69 will quickly push the coupling agent in the sanding ring 671 position, and the debris in the sanding ring 671 is swept down, so that the sanding ring 671 keeps clean state, the welding seam 32 position is polished efficiently, to avoid the influence of the debris on the polishing effect of the welding seam 32, with reference to Figure 6 , the coupling agent continues to be transported to the cavity 661 by the conveying pipe 68, and continuously overflowed through the overflow hole 665. Because the outer side of the driving wheel 66 has a shell 641, the shell 641 is provided with an opening opposite the position of the sanding wheel 67, the coupling agent cannot be randomly thrown, but can only contact the sanding wheel 67 through the opening, so that the coupling agent can continuously flush the welding seam 32 through the rotation of the sanding wheel 67, and the coupling agent on the surface of the welding seam 32 after polishing can be more clean, so as to directly carry out the subsequent ultrasonic flaw detection.

[0062] In further embodiments, in order to ensure the position stability of the engine sleeve 3 in the welding seam detection stage, with reference to Figure 11 , the free end of the pressing frame 53 is provided with an end sleeve 531, a blind hole is formed in the lower end of the end sleeve 531, and a ball bearing matched with the top end outer wall of the engine sleeve 3 is installed at the vertical inner wall position of the blind hole. The end sleeve 531 will always be sleeved on the top end of the engine sleeve 3 during the detection stage, including when the engine sleeve 3 is driven to rotate, so as to ensure that the engine sleeve 3 does not move horizontally relative to the ultrasonic flaw detection piece 5, and the position of the engine sleeve 3 does not change only the displacement of the fin 31. After the engine sleeve 3 rotates to complete the displacement of the fin 31, the displacement piece 8 rotates with high precision, the new fin 31 is directly rotated to the position of the old fin 31, the ultrasonic transceiver probe 54 is directly reset without repositioning, so that the welding seam 32 of the fin 31 can be immediately detected, and the detection operation is fast.

[0063] In further embodiments, during the horizontal displacement of the engine sleeve 3, with reference to Figure 12The conveying member 2 further comprises two rollers 21, one of which is connected with the servo motor through a shaft coupling to drive the belt 22 to rotate, the belt 22 is sleeved between the two rollers 21 and is taut, and the belt 22 is provided with a clamping strip 23 perpendicular to the advancing direction of the belt 22 on the side facing the roller 21, the outer wall of the roller 21 is provided with a clamping groove 24 matched with the clamping strip 23, the clamping strip 23 can prevent the belt 22 and the roller 21 from slipping during the rotation of the belt 22, and the displacement accuracy of the engine sleeve 3 is ensured, and it should be noted that when the engine sleeve 3 is made of ferrous alloy, steel or other materials that can be magnetized and adsorbed by a permanent magnet, the clamping strip 23 is made of a permanent magnet material, which can adsorb the engine sleeve 3 above the belt 22 when the belt 22 moves, preventing the engine sleeve 3 from falling, and the belt 22 is provided with an edge strip 25 parallel to the advancing direction of the belt 22 on the side facing the roller 21, the outer wall of the roller 21 is provided with a limiting groove 26 matched with the edge strip 25, the edge strip 25 can strengthen the edge of the belt 22, reduce the sinking of the belt 22 under pressure, and ensure the stability of the engine sleeve 3, and a supporting plate 27 can be arranged below the upper layer of the belt 22, the supporting plate 27 can support the upper layer of the belt 22, and when the engine sleeve 3 presses the belt 22, the stress of the belt 22 can be dispersed to avoid sinking of the belt 22, so as to adapt to the engine sleeve 3 with large weight.

[0064] The above is only a preferred embodiment of the present application, and is not intended to limit the protection scope of the present application.

Claims

1. A weld defect detection apparatus characterized by comprising: Include: Rack (1), the rack (1) has a skeleton (11); Conveying piece (2), the conveying piece (2) includes horizontally arranged conveying belt (22), the conveying belt (22) top surface is placed with engine sleeve (3), the outer wall of the upper part of the engine sleeve (3) is installed with annular array arranged fin (31), the fin (31) and the engine sleeve (3) between weld (32) are formed; The pretreatment piece (6) includes an angle adjusting assembly, a driving wheel (66) and a grinding wheel (67), the circumferential outer wall of the driving wheel (66) is in contact with the circumferential outer wall of the grinding wheel (67), the cavity (661) of the driving wheel (66) is provided with a coupling agent, the circumferential side wall of the grinding wheel (67) is provided with an overflow hole (665) in communication with the cavity (661); Ultrasonic flaw detection piece (5), the ultrasonic flaw detection piece (5) includes a vertical telescopic piece (51), a pressing frame (53) and an ultrasonic transceiver probe (54), the lower end of the vertical telescopic piece (51) is provided with a mechanical arm (52), the ultrasonic transceiver probe (54) is installed at the lower end of the mechanical arm (52), the pressing frame (53) is slidably sleeved on the outer side of the vertical telescopic piece (51) through the tension spring (532), and the free end of the pressing frame (53) extends to the upper side of the engine sleeve (3); Wherein, the angle adjusting assembly makes the grinding wheel (67) centrally placed 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 the coupling agent on the surface of the weld (32), the vertical telescopic piece (51) drives the pressing frame (53) to descend and press the engine sleeve (3), and the mechanical arm (52) drives the ultrasonic transceiver probe (54) to move closely to the weld (32).

2. The weld defect detection apparatus according to claim 1, characterized by The skeleton (11) is provided with two driving pieces (4) for the pretreatment piece (6), the skeleton (11) is provided with a transposition piece (8) for driving the engine sleeve (3) to rotate at positions corresponding to the ultrasonic flaw detection piece (5) and the pretreatment piece (6), the driving piece (4) includes a middle plate (45), the middle plate (45) is connected with the skeleton (11) through a servo cylinder one (43), the middle plate (45) is connected with two horizontally symmetrical clamping pieces (7) through a servo cylinder two (44), and the servo cylinder one (43) and the servo cylinder two (44) are perpendicular to each other.

3. The weld defect detection apparatus according to claim 2, characterized by The clamping piece (7) is provided with a contact arc surface (71) on the side facing the engine sleeve (3), the clamping piece (7) is provided with a collecting groove (72) on the top surface, and the lowest part of the collecting groove (72) is provided with a waste pipe.

4. The weld defect detection apparatus according to claim 2, characterized by The driving piece (4) further includes a linear module one (46), the linear module one (46) is provided with a linear module two (47) at the end, the linear module two (47) is provided with a linear module three (48) on the vertical side wall, and the pretreatment piece (6) is installed on the side of the linear module three (48) facing the engine sleeve (3).

5. The weld seam defect detection apparatus according to claim 4, characterized by The angle adjusting assembly comprises a sliding seat (61) assembled with the linear module three (48), a swing seat (63) is connected to the middle part of the sliding seat (61) through a swing driver (62), a support (64) is hinged to the lower end of the swing seat (63), and the support (64) is connected with the swing seat (63) through a telescopic cylinder (65).

6. The weld seam defect detection apparatus according to claim 5, characterized by The telescopic cylinder (65) is hinged to the lower end of the swing seat (63), an outer sleeve (651) is installed at the top end of the telescopic cylinder (65), an inner rod (652) is insertedly installed at the top of the outer sleeve (651), a sensor (654) is installed at the inner side bottom of the inner rod (652), and a spring (653) is installed between the sensor (654) and the inner rod (652).

7. The weld defect detection apparatus according to claim 1, characterized by The polishing wheel (67) is protruded in the middle part to form a sanding ring (671), the driving wheel (66) is provided with a contact surface one (663) and a contact surface two (664) with opposite inclined directions corresponding to the inclined surface of the polishing wheel (67).

8. The weld seam defect detection apparatus according to claim 7, characterized by The driving wheel (66) is provided with a ring groove (662) corresponding to the sanding ring (671), the overflow hole (665) is opened at the port of the ring groove (662), the brush (69) is installed in the middle part of the ring groove (662), and the brush (69) is in abutting contact with the sanding ring (671).

9. The weld defect detection apparatus according to claim 1, characterized by The free end of the pressing frame (53) is provided with an end sleeve (531), a blind hole is opened at the lower end of the end sleeve (531), and a ball bearing matched with the top outer wall of the engine sleeve (3) is installed at the vertical inner wall position of the blind hole.

10. The weld seam defect detection apparatus according to claim 9, characterized by The conveying member (2) further comprises two rollers (21), the conveying belt (22) is sleeved between the two rollers (21), the conveying belt (22) is provided with a clamping strip (23) perpendicular to the advancing direction of the conveying belt (22) on one side of the roller (21), the roller (21) is provided with a clamping groove (24) matched with the clamping strip (23) on the circumferential outer wall, the conveying belt (22) is provided with an edge strip (25) parallel to the advancing direction of the conveying belt (22) on one side of the roller (21), and the roller (21) is provided with a limiting groove (26) matched with the edge strip (25) on the circumferential outer wall.

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