CN220154261U - Laser ultrasonic detection device for circumferential weld of roller wall - Google Patents
Laser ultrasonic detection device for circumferential weld of roller wall Download PDFInfo
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- CN220154261U CN220154261U CN202322768033.8U CN202322768033U CN220154261U CN 220154261 U CN220154261 U CN 220154261U CN 202322768033 U CN202322768033 U CN 202322768033U CN 220154261 U CN220154261 U CN 220154261U
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- 238000000576 coating method Methods 0.000 claims description 11
- OFNHPGDEEMZPFG-UHFFFAOYSA-N phosphanylidynenickel Chemical compound [P].[Ni] OFNHPGDEEMZPFG-UHFFFAOYSA-N 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
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- 238000009659 non-destructive testing Methods 0.000 abstract 1
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Abstract
The utility model belongs to the technical field of nondestructive testing of welding seams, and particularly relates to a laser ultrasonic testing device for circumferential welds of roller walls, which comprises a base, wherein four groups of support brackets which are symmetrical in front-back and left-right are arranged in the middle of the base, support rollers are rotatably arranged on the support brackets, a first motor for driving the support rollers to rotate is arranged on the support brackets, a laser ultrasonic testing probe is arranged between the support brackets on the left side and the right side, and a clamping mechanism is arranged at the outer side ends of the support brackets and used for clamping a tested workpiece. According to the utility model, the detected workpiece is supported by the supporting roller, the detected workpiece is clamped by the clamping roller, the detected workpiece can be driven to rotate while being supported and clamped, and meanwhile, the laser ultrasonic detection probe is arranged below the detected workpiece, so that the non-contact automatic detection of the annular welding seam defect on the detected workpiece is realized.
Description
Technical Field
The utility model belongs to the technical field of nondestructive detection of welding seams, and particularly relates to a laser ultrasonic detection device for a circular welding seam of a roller wall.
Background
Along with the rapid development of industrialization, the metal pressure vessel is widely applied to the departments of chemical industry, petroleum, machinery, metallurgy, nuclear energy, aviation, aerospace and the like, and is an essential core device in the production process. The quality of the circumferential weld of the metal pressure vessel wall is a key factor affecting its lifetime. How to accurately and conveniently detect the circumferential weld defects of the metal pressure container wall has become a key problem.
Among the methods commonly used in the industry are the radiographic method and the ultrasonic method. Radiation detection detects defects in the girth weld by transmitting radiation through the girth weld and measuring the rate and extent of absorption of the radiation by a detector. The method can rapidly and accurately detect the defects of cracks and the like in the girth weld, but has higher requirement on the stability of the instrument, high cost, and the radiation related to the radiation safety problem can cause irreversible injury to the human body to a certain extent. Ultrasonic detection evaluates the girth weld by transmitting an ultrasonic signal and receiving an echo via a receiver. As an advanced ultrasonic detection method, laser ultrasonic detection is used, a coupling agent does not need to be coated on the surface of a workpiece, a probe does not need to be contacted with the workpiece, so that the detection efficiency of the girth weld is improved to a great extent, but in the laser ultrasonic detection process of the girth weld on the roller wall, thermal deformation can occur around the girth weld on the roller wall due to the influence of thermal welding thermal deformation, in addition, welding slag or tiny pits can remain around the girth weld on the roller wall, and incident laser is reflected or scattered in the laser ultrasonic detection process, so that the detection precision and sensitivity are influenced.
Disclosure of Invention
The utility model provides a laser ultrasonic detection device for a circular weld of a roller wall aiming at the problems.
The utility model adopts the following technical scheme to achieve the aim:
the utility model provides a laser ultrasonic testing device of cylinder wall girth weld, includes the base the middle part of base is provided with four sets of support brackets of bilateral symmetry the rotation is provided with the backing roller on the support bracket be provided with the motor that is used for driving the backing roller rotation on the support bracket be provided with flexible base between the support bracket of left and right sides be provided with four fine setting telescopic cylinder on flexible base the top of flexible base is provided with flexible platform, four the piston rod of fine setting telescopic cylinder passes through ball articulated mode and is connected with flexible platform's four angles the last fixed laser ultrasonic testing probe that is provided with of flexible platform, laser ultrasonic testing probe includes continuous laser receiver and pulse laser generator the outside end of support bracket is provided with clamping mechanism, clamping mechanism is used for pressing from both sides tight work piece being detected.
Further, clamping mechanism includes the gyro wheel support, the lower extreme of gyro wheel support is articulated with the outside end of support frame the articulated department of gyro wheel support and support frame is provided with No. two motors, no. two motors and support frame fixed connection for drive the gyro wheel support and rotate the upper end of gyro wheel support rotates and is provided with the clamp roller the upper end of gyro wheel support still installs and is used for driving clamp roller rotatory No. three motors the lateral surface of gyro wheel support still butt has the pneumatic cylinder, the cylinder body and the base of pneumatic cylinder are articulated, through the pneumatic cylinder forms the support to the gyro wheel support frame, thereby reaches the purpose of pressing from both sides tight work piece of being detected.
Still further, the distance from the circle center of the clamping roller to the hinge point of the roller support and the support is equal to the distance from the circle center of the support roller to the hinge point of the roller support and the support, and the radius of the clamping roller is the same as the radius of the support roller.
Still further, the telescopic end of pneumatic cylinder rotates and is provided with rotatory gyro wheel to be convenient for change the sliding friction between pneumatic cylinder and the gyro wheel support into rolling friction.
Furthermore, a photoelectric encoder is arranged in the second motor and used for detecting the rotation angle of the roller bracket and further calculating the radius of the detected workpiece.
Still further, flexible base is fixed to be set up on the Y axle slider, Y axle slider threaded connection is on the Y axle lead screw, Y axle slider still with Y axle guide rail sliding connection, Y axle lead screw and Y axle guide rail all set up on the Y axle slip table still fixedly on the Y axle slip table be provided with the rotatory Y axle motor of drive Y axle lead screw.
Still further, all be provided with lead screw elevating system on four angles of Y axle slip table, lead screw elevating system installs on the base, lead screw elevating system is used for driving Y axle slip table and goes up and down.
Further, the continuous laser receiver is provided with a light intensity detection device, and whether the intensity of the reflected light intensity received by the continuous laser receiver is enough or not is judged through the light intensity detection device.
And furthermore, a nickel-phosphorus black light-absorbing coating nozzle is also arranged on the Y-axis sliding block and is used for spraying nickel-phosphorus black light-absorbing coating to the detected workpiece.
Compared with the prior art, the utility model has the following advantages:
according to the utility model, the detected workpiece is supported by the supporting roller, and is clamped by the clamping roller, so that the detected workpiece can be driven to rotate while being supported and clamped, and meanwhile, the laser ultrasonic detection probe is arranged below the detected workpiece, so that the non-contact automatic detection of the girth weld defect on the detected workpiece is realized, the defect that the couplant is required in the traditional piezoelectric ultrasonic detection is overcome, and the efficient detection of the girth weld defect on the roller wall is realized;
the clamping mechanism is simple in structure and small in size, and meanwhile, the photoelectric encoder is arranged in the second motor, so that the clamping precision is improved, the output parameter types are reduced, the control efficiency is effectively improved, and meanwhile, the hydraulic cylinder is used as an auxiliary supporting device, and the clamping stability is improved;
the laser ultrasonic detection probe can realize Y-direction movement through the Y-axis lead screw and Z-direction movement through the lead screw lifting mechanism, so that the detection range is effectively enlarged, the detection radius is increased, the width of a detected structure and the range of defect types are also increased, and the adaptability and the functions of the device are greatly improved;
after the continuous laser receiver with the light intensity detection device receives the laser signals, the positions of the continuous laser receiver and the pulse laser generator can be finely adjusted through the fine adjustment telescopic cylinder, so that the incident laser is perpendicular to the thermal deformation surface around the circumferential weld of the roller wall, and the received reflected light intensity is strongest;
the light intensity detection device on the continuous laser receiver can judge the received reflected light intensity, when more welding slag or small pits exist on the periphery of the circular welding seam of the roller wall, laser is reflected or refracted, and the intensity of the reflected light is judged to be insufficient, so that the laser power is increased, and the incident light quantity is increased;
the utility model sets the nickel-phosphorus black light absorption coating nozzle for spraying nickel-phosphorus black light absorption coating to the detected workpiece, so that the surface of the detected workpiece absorbs laser more effectively, stronger ultrasonic waves are excited, besides preventing surface ablation, the reflection and scattering of the edge and welding slag to the incident light of the pulse laser generator can be reduced, thereby improving the detection precision and sensitivity.
Drawings
FIG. 1 is a state diagram of the present utility model;
FIG. 2 is a schematic diagram of the structure of the present utility model;
FIG. 3 is an enlarged view of a portion of circle A of FIG. 2 in accordance with the present utility model;
FIG. 4 is a schematic diagram of the radius measurement of a workpiece being inspected in accordance with the present utility model;
in the figure, a base 1, a support bracket 2, a support roller 3, a first motor 4, a laser ultrasonic detection probe 5, a clamping mechanism 6, a Y-axis sliding block 7, a Y-axis screw rod 8, a Y-axis guide rail 9, a Y-axis sliding table 10, a Y-axis motor 11, a screw rod lifting mechanism 12, a telescopic platform 13, a telescopic base 14, a fine-tuning telescopic cylinder 15, a nickel-phosphorus black light absorption coating spray head 16, a continuous laser receiver 501, a pulse laser generator 502, a roller bracket 601, a second motor 602, a clamping roller 603, a third motor 604, a hydraulic cylinder 605 and a rotary roller 606.
Detailed Description
In order to further illustrate the technical scheme of the utility model, the utility model is further illustrated by the following examples.
As shown in fig. 1, 2 and 3, the laser ultrasonic detection device for the circumferential weld of the roller wall comprises a base 1, four groups of support brackets 2 which are symmetrical in front-back and left-right are arranged in the middle of the base 1, support rollers 3 are rotatably arranged on the support brackets 2, a first motor 4 for driving the support rollers 3 to rotate is arranged on the support brackets 2, Y-axis sliding blocks 7 are arranged between the support brackets 2 on the left side and the right side, the Y-axis sliding blocks 7 are in threaded connection with Y-axis lead screws 8, the Y-axis sliding blocks 7 are also in sliding connection with Y-axis guide rails 9, the Y-axis lead screws 8 and the Y-axis guide rails 9 are all arranged on a Y-axis sliding table 10, Y-axis motors 11 for driving the Y-axis lead screws 8 to rotate are also fixedly arranged on the Y-axis sliding table 10, lead screw lifting mechanisms 12 are arranged on four corners of the Y-axis sliding table 10, the lead screw lifting mechanisms 12 are arranged on the base 1, the screw rod lifting mechanism 12 is used for driving the Y-axis sliding table 10 to lift, the Y-axis sliding block 7 is fixedly provided with a telescopic base 14, four fine adjustment telescopic cylinders 15 are arranged on the telescopic base 14, a telescopic platform 13 is arranged above the telescopic base 14, piston rods of the four fine adjustment telescopic cylinders 15 are connected with four corners of the telescopic platform 13 in a ball hinge mode, the telescopic platform 13 is fixedly provided with a laser ultrasonic detection probe 5, the laser ultrasonic detection probe 5 comprises a continuous laser receiver 501 and a pulse laser generator 502, the continuous laser receiver 501 is provided with a light intensity detection device, whether the intensity of reflected light intensity received by the continuous laser receiver 501 is enough or not is judged by the light intensity detection device, the Y-axis sliding block 7 is also provided with a nickel-phosphorus black light absorption coating spray head 16, the device is used for spraying nickel-phosphorus black light absorption coating to a detected workpiece, a clamping mechanism 6 is arranged at the outer side end of the supporting bracket 2, and the clamping mechanism 6 is used for clamping the detected workpiece.
The clamping mechanism 6 comprises a roller support 601, the lower end of the roller support 601 is hinged to the outer side end of the support 2, a second motor 602 is arranged at the hinge joint of the roller support 601 and the support 2, the second motor 602 is fixedly connected with the support 2 and used for driving the roller support 601 to rotate, a photoelectric encoder is arranged in the second motor 602 and used for detecting the rotation angle of the roller support 601, the radius of a detected workpiece is calculated, the upper end of the roller support 601 is rotatably provided with a clamping roller 603, the distance from the center of the clamping roller 603 to the hinge joint of the roller support 601 and the support 2 is equal to the distance from the center of the support roller 3 to the hinge joint of the roller support 601 and the support 2, the radius of the clamping roller 603 is the same as the radius of the support roller 3, a third motor 604 used for driving the clamping roller 603 to rotate is further arranged at the upper end of the roller support 601, a cylinder 605 is in butt joint with a hydraulic cylinder 605, the cylinder body of the hydraulic cylinder 605 is hinged to the base 1, the roller support 601 is supported by the hydraulic cylinder 605, and accordingly the purpose of converting the detected workpiece into a rolling friction between the roller support 601 and the rotating end of the hydraulic cylinder 605 is achieved.
The calculation principle of the radius of the detected workpiece is shown in fig. 4, and the method comprises the following steps:
s1, assuming that the circle centers of the left and right sides corresponding to the supporting roller 3 are a point B and a point G respectively, placing a detected workpiece on the supporting roller 3, wherein the circle center of the detected workpiece is positioned on a vertical line where a midpoint A of a connecting line of the point B and the point G is positioned, and meanwhile, the distance between the point A and the point B is known as AB=a;
s2, presetting an included angle between the roller support 601 and the support 2 asαWhen clamping, the second motor 602 drives the roller support 601 to rotate, and when the clamping roller 603 contacts with a detected workpiece, the second motor 602 automatically stops and outputs corresponding angle change through a built-in photoelectric encoderβ；
S3, let the hinge point of the roller bracket 601 and the support bracket 2 be point C, and the center of the clamping roller 603 be point D, so as to obtain bc=cd=b, ac=ab+bc=a+b;
s4, setting the midpoint of the connecting line of the point B and the point D as a point E, enabling the extension line of the connecting line of the point E and the point C to pass through the center of the detected workpiece, and combining the vertical line of the point A in the step S1 to determine the center point O of the detected workpiece;
s5, the step S2 can be used for solving,further get->；
S6, according to the trigonometric function relation, the following steps are obtained:
s7, since the radius of the clamping roller 603 is the same as the radius of the supporting roller 3, the contact point F between the supporting roller 3 and the workpiece to be detected is necessarily located on the line between the point B and the point O, and the distance between BF is equal to the radius r of the supporting roller 3, i.e., bf=r;
s8, combining the lengths of OB and BF to obtain the radius R of the detected workpiece as
。
The working process of the utility model comprises the following steps:
when the detected workpiece is placed on the laser ultrasonic detection device of the circular weld of the roller wall, the support roller 3 carries out preliminary support and fixation on the detected workpiece, the roller support 601 clamps the detected workpiece under the drive of the motor 602 II and outputs a corresponding radius R, meanwhile, the hydraulic cylinder 605 in the clamping mechanism 6 plays a clamping and fixation role on the detected workpiece, after the radius R of the detected workpiece is detected, the position of the laser ultrasonic detection probe 5 is coarsely regulated by the lead screw lifting mechanism 12 and the Y-axis lead screw 8, the continuous laser receiver 501 and the pulse laser generator 502 are finely regulated in different directions by the fine regulating telescopic cylinder 15, so that the incident laser is perpendicular to the thermal deformation surface around the circular weld of the roller wall, the received reflected light intensity is strongest, and meanwhile, the light intensity detection device judges whether the intensity of the reflected light intensity received by the continuous laser receiver 501 is enough, if the intensity of the received reflected light reaches the intensity requirement, the nickel-phosphorus black light absorption coating nozzle 16 sprays nickel-phosphorus black light absorption coating, then the pulse laser generator 502 emits pulse laser to generate ultrasonic waves, the ultrasonic waves propagate along the detected workpiece, the detected girth weld receives echo signals through the continuous laser receiver 501, the first motor 4 and the third motor 604 respectively drive the supporting roller 3 and the clamping roller 603 to rotate according to the radius R of the detected workpiece at the required speed, further drive the detected workpiece to rotate, different girth welds generate different interference on the ultrasonic signals, and meanwhile, different ultrasonic signals generate different interference results on the laser of the laser receiver 501, and (5) finishing the detection of the girth weld of the detected workpiece.
While the principal features and advantages of the present utility model have been shown and described, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but that the utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (9)
1. A laser ultrasonic detection device for a circular weld of a roller wall is characterized in that: including base (1) the middle part of base (1) is provided with four sets of support brackets (2) of bilateral symmetry the rotation is provided with supporting roller (3) on support bracket (2) be provided with on support bracket (2) and be used for driving rotatory motor (4) of supporting roller (3), be provided with flexible base (14) between support bracket (2) of left and right sides flexible base (14) are last to be provided with four fine setting flexible jar (15) the top of flexible base (14) is provided with flexible platform (13), four the piston rod of fine setting flexible jar (15) is connected with four angles of flexible platform (13) through ball articulated mode the fixed laser ultrasonic detection probe (5) that are provided with on flexible platform (13), laser ultrasonic detection probe (5) are including continuous laser receiver (501) and pulse laser generator (502) the outside end of support bracket (2) is provided with clamping mechanism (6), clamping mechanism (6) are used for pressing from both sides tight work piece.
2. A laser ultrasonic testing device for circumferential welds on walls of a cylinder as defined in claim 1, wherein: the clamping mechanism (6) comprises a roller support (601), the lower end of the roller support (601) is hinged to the outer side end of the support frame (2), a second motor (602) is arranged at the hinged position of the roller support (601) and the support frame (2), the second motor (602) is fixedly connected with the support frame (2) and used for driving the roller support (601) to rotate, the upper end of the roller support (601) is rotatably provided with a clamping roller (603), the upper end of the roller support (601) is further provided with a third motor (604) used for driving the clamping roller (603) to rotate, a hydraulic cylinder (605) is further abutted to the outer side surface of the roller support (601), and a cylinder body of the hydraulic cylinder (605) is hinged to the base (1) and used for supporting the roller support (601) in a supporting mode, so that a workpiece to be detected is clamped.
3. A laser ultrasonic testing device for circumferential welds on walls of a cylinder as defined in claim 2, wherein: the distance from the circle center of the clamping roller (603) to the hinge point of the roller support (601) and the support bracket (2) is equal to the distance from the circle center of the support roller (3) to the hinge point of the roller support (601) and the support bracket (2), and the radius of the clamping roller (603) is the same as the radius of the support roller (3).
4. A laser ultrasonic testing device for circumferential welds on walls of a cylinder as defined in claim 2, wherein: a rotary roller (606) is rotatably arranged at the telescopic end of the hydraulic cylinder (605).
5. A laser ultrasonic testing device for circumferential welds on walls of a cylinder as defined in claim 2, wherein: and a photoelectric encoder is arranged in the second motor (602) and used for detecting the rotation angle of the roller bracket (601) and further calculating the radius of the detected workpiece.
6. A laser ultrasonic testing device for circumferential welds on walls of a cylinder as defined in claim 1, wherein: the telescopic base (14) is fixedly arranged on the Y-axis sliding block (7), the Y-axis sliding block (7) is in threaded connection with the Y-axis lead screw (8), the Y-axis sliding block (7) is also in sliding connection with the Y-axis guide rail (9), the Y-axis lead screw (8) and the Y-axis guide rail (9) are both arranged on the Y-axis sliding table (10), and the Y-axis sliding table (10) is also fixedly provided with a Y-axis motor (11) for driving the Y-axis lead screw (8) to rotate.
7. The laser ultrasonic detection device for circumferential welds on walls of a cylinder according to claim 6, wherein: four corners of the Y-axis sliding table (10) are respectively provided with a screw lifting mechanism (12), and the screw lifting mechanisms (12) are arranged on the base (1).
8. A laser ultrasonic testing device for circumferential welds on walls of a cylinder as defined in claim 1, wherein: the continuous laser receiver (501) is provided with an optical intensity detection device.
9. The laser ultrasonic detection device for circumferential welds on walls of a cylinder according to claim 6, wherein: and a nickel-phosphorus black light-absorbing coating nozzle (16) is also arranged on the Y-axis sliding block (7) and is used for spraying nickel-phosphorus black light-absorbing coating to the detected workpiece.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322768033.8U CN220154261U (en) | 2023-10-16 | 2023-10-16 | Laser ultrasonic detection device for circumferential weld of roller wall |
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| CN202322768033.8U CN220154261U (en) | 2023-10-16 | 2023-10-16 | Laser ultrasonic detection device for circumferential weld of roller wall |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118376584A (en) * | 2024-06-25 | 2024-07-23 | 常州融亿办智能科技有限公司 | Battery production welding line nondestructive testing system based on laser ultrasonic technology |
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2023
- 2023-10-16 CN CN202322768033.8U patent/CN220154261U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118376584A (en) * | 2024-06-25 | 2024-07-23 | 常州融亿办智能科技有限公司 | Battery production welding line nondestructive testing system based on laser ultrasonic technology |
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