Spring steel wire ultrasonic flaw detection equipment and positioning method

Abstract

The invention relates to the technical field of spring detection, and discloses a spring steel wire ultrasonic flaw detection device and a positioning method.The spring steel wire ultrasonic flaw detection device comprises two linear motors, each linear motor is provided with a moving part, each moving part is provided with a compensation part, each compensation part is provided with a cooperation part, and each cooperation part is provided with an ultrasonic flaw detection device; the moving part comprises a column A and a column B, the column A and the column B are connected with mounting sleeves and supports, each mounting sleeve is rotationally connected with a first rotating rod, technical breakthrough is achieved through a multi-probe cooperative scanning structure, ultrasonic probes are arranged on a ring A and a ring B respectively and are distributed in a circumferential array mode, the adjacent probes A and B form a detection matrix in six directions, and the detection matrix in the six directions is matched with the ultrasonic probes. The probe can form a spiral scanning path along the spiral curved surface of the spring in cooperation with reverse rotating motion driven by the rotating motor and axial movement of the linear motor, full-surface and internal defect coverage is achieved, scanning blind areas of traditional equipment are eliminated, and the defects such as tiny cracks and inclusions are effectively detected.

Description

Technical Field

[0001] The present invention relates to the technical field of spring detection, in particular to a spring steel wire ultrasonic flaw detection device and a positioning method. Background Art

[0002] In spring manufacturing, the internal quality of spring steel wire, including defects such as cracks, inclusions, and porosity, directly determines the spring's fatigue life and safety performance. Ultrasonic flaw detection, due to its sensitivity to internal defects and its non-contact detection capabilities, has become a core method for spring steel wire quality inspection. However, existing ultrasonic flaw detection equipment suffers from incomplete detection coverage.

[0003] Traditional single probes or fixed-angle probes are difficult to adapt to the spring spiral surface structure, which can easily form scanning blind areas and lead to missed detection of minor defects.

[0004] Spacing fluctuations affect detection accuracy. The height difference of the spring spiral surface and the micro-vibration during equipment operation will cause the coupling gap between the probe and the steel wire surface to be unstable, causing ultrasonic signal attenuation or reflection disorder. Springs of different diameters require replacement of special fixtures, which are cumbersome to adjust, and rigid clamping can easily cause damage to the steel wire surface or positioning deviation.

[0005] Mechanical interference from probe rotation and axial movement, as well as external vibrations, can interfere with flaw signal recognition and reduce the signal-to-noise ratio. Conventional equipment has weak anti-interference capabilities. Therefore, a spring steel wire ultrasonic flaw detection device and positioning method are proposed to address these issues. Summary of the Invention

[0006] (1) Technical problems solved In response to the shortcomings of the existing technology, the present invention provides a spring steel wire ultrasonic flaw detection equipment and positioning method, which solves the problems that the traditional single probe is difficult to adapt to the spring spiral surface structure, the height difference of the spring spiral surface and the micro-vibration during equipment operation will cause the coupling gap between the probe and the steel wire surface to be unstable, thereby reducing the detection accuracy. Springs of different diameters require replacement of special fixtures, and the traditional equipment has weak anti-interference ability.

[0007] (2) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a spring steel wire ultrasonic flaw detection device, comprising a linear motor, wherein there are two linear motors, a moving part is provided on the linear motor, a compensating part is provided on the moving part, a cooperating part is provided on the compensating part, the moving part comprises an A column and a B column, both the A column and the B column are connected with a mounting sleeve and a bracket, each mounting sleeve is rotatably connected to a rotating rod 1, each end of the rotating rod 1 is sleeved with a bevel gear 1, a rotating rod 2 is rotatably connected between the A column and the B column, a bevel gear 2 is sleeved on the rotating rod 2, the compensating part comprises a rotating motor, the rotating motor is mounted on the A column and the output end is connected to the A rod, the A rod The end is connected to an A ring, and an A ultrasonic probe slides through the A ring, and an A sliding shell is connected to the A ring, and an A block is slidably connected to the A sliding shell. An A spring is elastically connected between the A block and the inner wall of the A sliding shell, and the A block abuts against the A ultrasonic probe. A through hole is provided on the A ring, and the cooperative part includes a B rod, which is rotatably connected to the B column and connected to the B ring at the end. The B rod moves through the through hole, and the B ring is arranged in the A ring. An B ultrasonic probe slides through the B ring, and the B ring is connected to the B sliding shell, and a B block is slidably connected in the B sliding shell. A B spring is elastically connected between the B block and the inner wall of the B sliding shell, and the B block abuts against the B ultrasonic probe. A laser displacement sensor is installed on the inner wall of the B ring.

[0008] Preferably, the A rod is rotatably connected to the bracket of the A column, and the A rod is provided with an A bevel gear, which is engaged with the bevel gear 1 at one end of the rotating rod 1 of the A column, and the bevel gear 1 at the other end of the rotating rod 1 of the A column is engaged with the bevel gear 2 at one end of the rotating rod 2, and three special-shaped grooves are opened around the A ring.

[0009] Preferably, the B rod is rotatably connected to the bracket of the B pillar, and a B bevel gear is sleeved on the B rod. The B bevel gear is engaged with the bevel gear 1 at one end of the rotating rod 1 of the B pillar, and the bevel gear 1 at the other end of the rotating rod 1 of the B pillar is engaged with the bevel gear 2 at the other end of the rotating rod 2. Three rod grooves are arranged around the B ring.

[0010] Preferably, the number of the A ultrasonic probe, A sliding shell, A block and A spring is three each and they are arranged in an array on the A ring, the number of the B ultrasonic probe, B sliding shell, B block and B spring is three each and they are arranged in an array on the B ring, the angle between each two of the A ultrasonic probes is degrees, the angle between each two of the B ultrasonic probes is degrees, and the angle between each A ultrasonic probe and its adjacent B ultrasonic probe is degrees.

[0011] Preferably, the three special-shaped grooves correspond one-to-one to the three B ultrasonic probes and three B sliding shells on the B ring, the three rod grooves correspond one-to-one to the three A ultrasonic probes on the A ring, and the rotating motor is electrically connected to the laser displacement sensor.

[0012] Preferably, a working cabin is provided on the linear motor, and the two linear motors are installed in the working cabin. The A-pillar and the B-pillar are respectively installed on the mover ends of the two linear motors. A chassis is installed on the working cabin, and a microprocessor is provided in the chassis.

[0013] Preferably, a clamping portion is provided on the chassis, and the clamping portion includes a mounting platform, the mounting platform is installed on the chassis and passes through the working cabin, a support rod is fixedly connected to the mounting platform, a positioning cylinder is fixedly connected to the support rod, six sliding holes are opened on the positioning cylinder in a circular array, and clamping arms are slidably connected in the six sliding holes, and the sides of the six clamping arms that are close to each other are all inclined structures.

[0014] Preferably, an adjustment part is provided on the mounting platform, and the adjustment part includes an electric push rod, which is installed on the mounting platform and electrically connected to the microprocessor. The rotating motor is electrically connected to the microprocessor. The movable end of the electric push rod passes through the interior of the positioning cylinder and is fixedly connected to a table-shaped sliding column, and the table-shaped sliding column fits with the inclined surfaces of the six clamping arms.

[0015] Preferably, the center of the positioning cylinder is aligned with the center of the A ring, the B ring, the electric push rod and the table-shaped sliding column, and a spring body is provided on the positioning cylinder, and the spring body is abutted against the six clamping arms, and an isolation cover is connected to the working cabin by a buckle.

[0016] A positioning method for a spring steel wire ultrasonic flaw detection device, based on the above-mentioned spring steel wire ultrasonic flaw detection device, comprises the following steps: S1: After turning on the device, the microprocessor controls the rotary motor and linear motor to reset, so that the A ring and the B ring are coaxially aligned, and the A ultrasonic probe and the B ultrasonic probe are pressed into the corresponding special-shaped groove and rod groove, and the laser displacement sensor starts self-test and records the initial zero position data; S2: Insert the spring body into the positioning cylinder. The microprocessor drives the electric push rod to extend and retract, driving the table-shaped slide column to move axially along the inside of the positioning cylinder. The inclined surface of the table-shaped slide column squeezes the inclined surfaces of the six clamping arms, causing the clamping arms to expand radially along the sliding hole, thereby clamping the inner side of the spring body and ensuring that the spring axis is aligned with the center of the A and B rings. Adjust the A and B clamping blocks to force the A and B ultrasonic probes to contact the outer diameter surface of the spring body through the coupling agent. The six probes are always aligned with the six clamping arms to ensure reflection accuracy, laying a good foundation for flaw detection. S3: The linear motor drives the A-pillar and B-pillar to move synchronously. When the laser displacement sensor detects spacing fluctuations caused by the spring spiral surface or equipment vibration, the rotary motor starts, driving the A-bevel gear to rotate through the A-rod. The A-rod is then driven by the A-bevel gear 1 and the A-bevel gear 2 on the rotating rod 2, which synchronously drives the helical gear set on the B-pillar. The B-rod drives the B-ring to rotate in the opposite direction of the A-ring. The special-shaped groove of the A-ring and the rod groove of the B-ring avoid each other, ensuring that the A-probe and the B-probe are separated without interference and fine-tuning the angle. A detection matrix is ​​formed by six directions, achieving full coverage scanning and anti-interference compensation for the spring body flaw detection. S4: Ultrasonic probes A and B alternately emit high-frequency ultrasonic signals, which are transmitted to the spring steel wire through the coupling agent. When encountering internal defects, the reflected signals are received by the probes and converted into electrical signals, which are transmitted to the microprocessor for defect detection and signal acquisition.

[0017] (3) Beneficial effects Compared with the prior art, the present invention provides a spring steel wire ultrasonic flaw detection device and positioning method, which has the following beneficial effects: 1. This spring steel wire ultrasonic flaw detection equipment and positioning method achieves a technological breakthrough through a multi-probe collaborative scanning structure. An ultrasonic probe is set on the A ring and the B ring respectively, distributed in a circular array. Adjacent A and B probes form a six-position detection matrix. Combined with the reverse rotation motion driven by the rotary motor and the axial movement of the linear motor, the probe can form a spiral scanning path along the spring's spiral surface, achieving full surface and internal defect coverage, eliminating the scanning blind spots of traditional equipment, and effectively detecting defects such as tiny cracks and inclusions.

[0018] 2. This spring steel wire ultrasonic flaw detection equipment and positioning method uses a laser displacement sensor on the inner wall of the B ring to monitor the distance between the probe and the spring surface in real time. When a distance fluctuation is detected, the microprocessor immediately triggers a compensation mechanism and fine-tunes the angles of the A and B rings by rotating the motor to stabilize the distance within the optimal coupling range, avoiding signal attenuation or reflection disturbances, and significantly improving defect positioning accuracy.

[0019] 3. The spring steel wire ultrasonic flaw detection equipment and positioning method adopts a stepless adjustment clamping structure. The six clamping arms on the positioning cylinder cooperate with the table-shaped sliding column through the inclined surface. When the electric push rod drives the sliding column to move axially, the clamping arms expand radially along the sliding hole, realizing stepless clamping from the inside of the spring. It can adapt to springs of different diameters without changing the tooling. The elastic clamping method avoids damage to the steel wire surface caused by rigid extrusion, and at the same time ensures that the spring axis is aligned with the center of the probe, thereby improving positioning stability.

[0020] 4. This spring steel wire ultrasonic flaw detection equipment and positioning method uses the special-shaped groove of ring A and the rod groove of ring B to avoid each other during rotation, avoiding mechanical interference between probe rotation and axial movement. The working cabin and the isolation cover form a closed space to reduce external vibration and dust interference. The microprocessor performs noise reduction processing on the ultrasonic signal, combined with multi-probe data cross-validation, effectively distinguishes defect signals from noise, and the signal-to-noise ratio is significantly improved compared with traditional equipment.

[0021] 5. This spring steel wire ultrasonic flaw detection equipment and positioning method uses a complete process from initialization calibration, spring clamping, dynamic scanning to defect signal acquisition without manual intervention. The axial movement speed of the linear motor and the angle adjustment of the rotary motor work together to significantly shorten the inspection time of a single spring compared to traditional equipment. In addition, the inspection data is stored in real time and reports are automatically generated, facilitating quality traceability and process optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a diagram showing the internal structure of a working cabin of a spring steel wire ultrasonic flaw detection device proposed by the present invention; Figure 2 This is a connection diagram of the moving part, compensation part and coordination part of the spring steel wire ultrasonic flaw detection equipment proposed by the present invention; Figure 3 This is a schematic structural diagram of the moving part of a spring steel wire ultrasonic flaw detection device proposed by the present invention; Figure 4 This is a connection diagram of the compensation part and the coordination part of the spring steel wire ultrasonic flaw detection equipment proposed by the present invention; Figure 5 This is a schematic diagram of the structure of the compensation part of the spring steel wire ultrasonic flaw detection equipment proposed by the present invention; Figure 6 This is a schematic diagram of the structure of the collaborative part of the spring steel wire ultrasonic flaw detection equipment proposed by the present invention; Figure 7 This is a schematic diagram of the structure of the clamping part of a spring steel wire ultrasonic flaw detection device proposed by the present invention; Figure 8 This is a diagram showing the internal structure of a positioning cylinder of a spring steel wire ultrasonic flaw detection device proposed by the present invention; Figure 9 This is a schematic diagram of the overall structure of a spring steel wire ultrasonic flaw detection device proposed by the present invention.

[0023] In the figure: 1. Linear motor; 2. Moving part; 21. A-pillar; 22. B-pillar; 23. Mounting sleeve; 24. Bracket; 25. Rotating rod 1; 26. Bevel gear 1; 27. Rotating rod 2; 28. Bevel gear 2; 3. Compensating part; 31. Rotating motor; 32. A-rod; 33. A-bevel gear; 34. A-ring; 35. A-ultrasound probe; 36. A-sliding housing; 37. A-block; 38. Special-shaped groove; 39 , through hole; 4. Coordinating part; 41. B rod; 42. B bevel gear; 43. B ring; 44. B ultrasonic probe; 45. B sliding shell; 46. B block; 47. Rod groove; 5. Working cabin; 6. Chassis; 7. Clamping part; 71. Mounting table; 72. Support rod; 73. Positioning cylinder; 74. Clamping arm; 8. Adjusting part; 81. Electric push rod; 82. Table-type sliding column; 9. Spring body; 10. Isolation cover. DETAILED DESCRIPTION

[0024] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] See also Figure 1-9The present invention provides a technical solution: a spring steel wire ultrasonic flaw detection device, including a linear motor 1, the number of linear motors 1 is two, the linear motor 1 is provided with a moving part 2, the moving part 2 is provided with a compensation part 3, the compensation part 3 is provided with a coordination part 4, the moving part 2 includes an A column 21 and a B column 22, the A column 21 and the B column 22 are connected with a mounting sleeve 23 and a bracket 24, each mounting sleeve 23 is rotatably connected to a rotating rod 1 25, the end of each rotating rod 1 25 is sleeved with a bevel gear 1 26, the A column 21 and the B column 22 are rotatably connected with a rotating rod 27, the rotating rod 27 is sleeved with a bevel gear 28, the compensation part 3 includes a rotating motor 31, the rotating motor 31 is installed on the A column 21 and the output end is connected to the A rod 32, the end of the A rod 32 is connected to the A ring 34, and the A ring 34 slides on An A ultrasonic probe 35 is movably passed through the A ring 34, an A sliding shell 36 is connected to the A ring 34, an A block 37 is slidably connected in the A sliding shell 36, an A spring is elastically connected between the A block 37 and the inner wall of the A sliding shell 36, and the A block 37 abuts against the A ultrasonic probe 35. A through hole 39 is provided on the A ring 34, and the cooperative part 4 includes a B rod 41, which is rotatably connected to the B column 22 and has a B ring 43 connected at its end. The B rod 41 movably passes through the through hole 39, and the B ring 43 is arranged in the A ring 34. The B ultrasonic probe 44 is slidably passed through the B ring 43, the B sliding shell 45 is connected to the B ring 43, and the B block 46 is slidably connected in the B sliding shell 45. A B spring is elastically connected between the B block 46 and the inner wall of the B sliding shell 45, and the B block 46 abuts against the B ultrasonic probe 44. A laser displacement sensor is installed on the inner wall of the B ring 43.

[0026] In this embodiment, the A rod 32 is rotatably connected to the bracket 24 of the A column 21, and the A rod 32 is provided with an A bevel gear 33. The A bevel gear 33 meshes with the bevel gear 1 26 at one end of the rotating rod 1 25 of the A column 21, and the bevel gear 1 26 at the other end of the rotating rod 1 25 of the A column 21 meshes with the bevel gear 2 28 at one end of the rotating rod 27. Three special-shaped grooves 38 are opened around the A ring 34. The B rod 41 is rotatably connected to the bracket 24 of the B column 22, and the B rod 41 is provided with a B bevel gear 42. The B bevel gear 42 meshes with the bevel gear 1 26 at one end of the rotating rod 1 25 of the B column 22, and the bevel gear 1 26 at the other end of the rotating rod 1 25 of the B column 22 meshes with the bevel gear 2 28 at the other end of the rotating rod 27. Three rod grooves 47 are opened around the B ring 43. There are three A ultrasonic probes 35, three A sliding shells 36, three A blocks 37 and three A springs, and they are arranged in an array on the A ring 34. There are three B ultrasonic probes 44, three B sliding shells 45, three B blocks 46 and three B springs, and they are arranged in an array on the B ring 43. The angle between every two A ultrasonic probes 35 is 120 degrees, the angle between every two B ultrasonic probes 44 is 120 degrees, and the angle between each A ultrasonic probe 35 and its adjacent B ultrasonic probe 44 is 60 degrees. The three special-shaped grooves 38 correspond one-to-one to the three B ultrasonic probes 44 and the three B sliding shells 45 on the B ring 43 respectively. The three rod grooves 47 correspond one-to-one to the three A ultrasonic probes 35 on the A ring 34 respectively. The rotating motor 31 is electrically connected to the laser displacement sensor.

[0027] It is worth noting that a working cabin 5 is provided on the linear motor 1, and two linear motors 1 are installed in the working cabin 5. The A column 21 and the B column 22 are respectively installed on the mover ends of the two linear motors 1. A chassis 6 is installed on the working cabin 5, and a microprocessor is provided in the chassis 6. A clamping part 7 is provided on the chassis 6. The clamping part 7 includes a mounting platform 71. The mounting platform 71 is installed on the chassis 6 and passes through the working cabin 5. A support rod 72 is fixedly connected to the mounting platform 71. A positioning cylinder 73 is fixedly connected to the support rod 72. The positioning cylinder Six sliding holes are provided in a circular array on 73, and clamping arms 74 are slidably connected in the six sliding holes. The sides of the six clamping arms 74 that are close to each other are all inclined structures. An adjustment part 8 is provided on the mounting platform 71, and the adjustment part 8 includes an electric push rod 81. The electric push rod 81 is installed on the mounting platform 71 and is electrically connected to the microprocessor. The rotating motor 31 is electrically connected to the microprocessor. The movable end of the electric push rod 81 passes through the interior of the positioning cylinder 73 and is fixedly connected to a table-shaped sliding column 82. The table-shaped sliding column 82 fits the inclined surfaces of the six clamping arms 74.

[0028] It is worth noting that the center of the positioning cylinder 73 is aligned with the center of the A ring 34, the B ring 43, the electric push rod 81 and the stage-type slide column 82. A spring body 9 is provided on the positioning cylinder 73, and the spring body 9 is in contact with the six clamping arms 74. An isolation cover 10 is connected to the working cabin 5 by a buckle, and flaw detection operations are performed inside the working cabin 5 and the isolation cover 10 to further resist external interference and improve detection accuracy.

[0029] A positioning method for a spring steel wire ultrasonic flaw detection device, based on the above-mentioned spring steel wire ultrasonic flaw detection device, comprises the following steps: S1: After turning on the device, the microprocessor controls the rotary motor 31 and the linear motor 1 to reset, so that the A ring 34 and the B ring 43 are coaxially aligned, and the A ultrasonic probe 35 and the B ultrasonic probe 44 are pressed into the corresponding special-shaped groove 38 and rod groove 47. The laser displacement sensor starts self-test and records the initial zero position data; S2: Insert the spring body 9 into the positioning tube 73. The microprocessor drives the electric push rod 81 to extend and retract, driving the stage-shaped slide column 82 to move axially along the interior of the positioning tube 73. The inclined surface of the stage-shaped slide column 82 squeezes the inclined surfaces of the six clamping arms 74, causing the clamping arms 74 to expand radially along the sliding hole, thereby clamping the inner side of the spring body 9 and ensuring that the spring axis is aligned with the center of the A ring 34 and the B ring 43. Adjust the A clamping block 37 and the B clamping block 46 to force the A ultrasonic probe 35 and the B ultrasonic probe 44 to contact the outer diameter surface of the spring body 9 through the coupling agent. The six probes are always aligned with the six clamping arms 74 to ensure reflection accuracy, laying a good foundation for flaw detection. S3: The linear motor 1 drives the A-pillar 21 and the B-pillar 22 to move synchronously. When the laser displacement sensor detects that the spacing fluctuates due to the spring spiral surface or equipment vibration, the rotary motor 31 starts, and drives the A-bevel gear 33 to rotate through the A-rod 32. The rotation is then transmitted through the bevel gear 1 26 on the A-pillar 21 and the bevel gear 2 28 on the rotating rod 27, and the bevel gear set on the B-pillar 22 is synchronously driven, so that the B-rod 41 drives the B-ring 43 and the A-ring 34 to rotate in opposite directions. The special-shaped groove 38 of the A-ring 34 and the rod groove 47 of the B-ring 43 avoid each other, ensuring that the A-ultrasonic probe 35 and the B-ultrasonic probe 44 are separated from each other without interference and the angles are fine-tuned. A detection matrix is ​​formed by six directions to achieve full coverage scanning and anti-interference compensation for the flaw detection of the spring body 9; S4: Ultrasonic probe A 35 and ultrasonic probe B 44 alternately emit high-frequency ultrasonic signals, which are transmitted to the spring steel wire through the coupling agent. When encountering internal defects, the reflected signals are received by the probes and converted into electrical signals, which are transmitted to the microprocessor for defect detection and signal acquisition.

[0030] Working principle: The microprocessor controls the reset of the rotary motor 31 and the linear motor 1, so that the A ring 34 and the B ring 43 are coaxially aligned, the A ultrasonic probe 35 is embedded in the rod groove 47 of the B ring 43, and the B ultrasonic probe 44 is embedded in the special-shaped groove 38 of the A ring 34 to ensure that there is no interference in the initial state. The laser displacement sensor on the inner wall of the B ring 43 is started to record the initial zero position data of the probe and the center of the positioning cylinder 73 to establish a benchmark for subsequent spacing compensation.

[0031] Insert the spring body 9 into the positioning tube 73, and the microprocessor drives the electric push rod 81 to extend and retract. The stage-shaped slide column 82 squeezes the inclined surface of the clamping arm 74, so that the six clamping arms 74 radially expand and clamp the spring, ensuring that the spring axis is aligned with the center of the circle of the A ring 34 and the B ring 43. Adjust the A block 37 and the B block 46 to cancel the limit on the probe, adjust the probe distance to match the outer diameter of the current spring body 9 to be tested, and contact the outer diameter surface of the spring through the coupling agent. The six probes are aligned with the six clamping arms 74 respectively to accurately reflect the ultrasonic signal and ensure reflection accuracy.

[0032] The linear motor 1 drives the A-pillar 21 and the B-pillar 22 to move at a uniform speed along the axial direction of the spring to achieve axial coverage. At the same time, the rotary motor 31 drives the rotating rod 1 25 and the rotating rod 2 27 through the A-rod 32 and the A-bevel gear 33, and drives the B-rod 41 and the B-ring 43 to rotate in the opposite direction to the A-ring 34 through the gear transmission, so that the A-ultrasonic probe 35 and the B-ultrasonic probe 44 form a spiral scanning path.

[0033] The laser displacement sensor monitors the distance to the surface of the spring body 9 in real time. When it detects that the distance fluctuates due to the spiral surface or vibration, the microprocessor controls the rotary motor 31 to fine-tune the angles of the A ring 34 and the B ring 43 to stabilize the distance within the optimal coupling range.

[0034] The special-shaped groove 38 of the A ring 34 and the rod groove 47 of the B ring 43 avoid each other during rotation without mechanical interference, and the six probes form a detection matrix in six directions, covering the entire surface of the spring.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

Claims

1. An ultrasonic flaw detection device for spring steel wire, comprising a linear motor (1), characterized in that: There are two linear motors (1), the linear motors (1) are provided with a moving part (2), the moving part (2) is provided with a compensation part (3), the compensation part (3) is provided with a cooperation part (4), the moving part (2) includes an A column (21) and a B column (22), the A column (21) and the B column (22) are both connected with a mounting sleeve (23) and a bracket (24), each mounting sleeve (23) is rotatably connected to a rotating rod (25), the end of each rotating rod (25) is sleeved with a bevel gear (26), the A column (21) and the B column (22) are rotatably connected to a rotating rod (27), and the rotating rod (27) is sleeved with a bevel gear (28); The compensation part (3) includes a rotating motor (31), which is mounted on the A column (21) and has an output end connected to an A rod (32), an end of the A rod (32) is connected to an A ring (34), an A ultrasonic probe (35) is slidably penetrated on the A ring (34), an A sliding shell (36) is connected to the A ring (34), an A clamping block (37) is slidably connected inside the A sliding shell (36), an A spring is elastically connected between the A clamping block (37) and the inner wall of the A sliding shell (36), the A clamping block (37) is in contact with the A ultrasonic probe (35), and a through hole (39) is provided on the A ring (34); The cooperative part (4) includes a B rod (41), the B rod (41) is rotatably connected to the B column (22) and the end thereof is connected to a B ring (43), the B rod (41) movably passes through the through hole (39), the B ring (43) is arranged in the A ring (34), a B ultrasonic probe (44) is slidably passed through the B ring (43), a B sliding shell (45) is connected to the B ring (43), a B clamping block (46) is slidably connected in the B sliding shell (45), a B spring is elastically connected between the B clamping block (46) and the inner wall of the B sliding shell (45), the B clamping block (46) is in contact with the B ultrasonic probe (44), and a laser displacement sensor is installed on the inner wall of the B ring (43).

2. The spring steel wire ultrasonic flaw detection device according to claim 1, characterized in that: The A rod (32) is rotatably connected to the bracket (24) of the A column (21). The A rod (32) is provided with an A bevel gear (33). The A bevel gear (33) is engaged with the bevel gear 1 (26) at one end of the rotating rod 1 (25) of the A column (21). The bevel gear 1 (26) at the other end of the rotating rod 1 (25) of the A column (21) is engaged with the bevel gear 2 (28) at one end of the rotating rod 2 (27). Three special-shaped grooves (38) are formed around the A ring (34).

3. The spring steel wire ultrasonic flaw detection device according to claim 2, characterized in that: The B rod (41) is rotatably connected to the bracket (24) of the B column (22). The B rod (41) is provided with a B bevel gear (42). The B bevel gear (42) is engaged with the bevel gear 1 (26) at one end of the rotating rod 1 (25) of the B column (22). The bevel gear 1 (26) at the other end of the rotating rod 1 (25) of the B column (22) is engaged with the bevel gear 2 (28) at the other end of the rotating rod 2 (27). Three rod grooves (47) are formed around the B ring (43).

4. The spring steel wire ultrasonic flaw detection device according to claim 3, characterized in that: The number of each of the A ultrasonic probe (35), the A sliding shell (36), the A clamping block (37) and the A spring is three and they are arranged in an array on the A ring (34); the number of each of the B ultrasonic probe (44), the B sliding shell (45), the B clamping block (46) and the B spring is three and they are arranged in an array on the B ring (43); the angle between each two of the A ultrasonic probes (35) is 120 degrees, the angle between each two of the B ultrasonic probes (44) is 120 degrees, and the angle between each of the A ultrasonic probes (35) and its adjacent B ultrasonic probe (44) is 60 degrees.

5. The spring steel wire ultrasonic flaw detection device according to claim 4, characterized in that: The three special-shaped grooves (38) correspond one-to-one to the three B ultrasonic probes (44) and the three B sliding shells (45) on the B ring (43), respectively; the three rod grooves (47) correspond one-to-one to the three A ultrasonic probes (35) on the A ring (34), respectively; and the rotary motor (31) is electrically connected to the laser displacement sensor.

6. The spring steel wire ultrasonic flaw detection device according to claim 5, characterized in that: A working cabin (5) is provided on the linear motor (1), and the two linear motors (1) are both installed in the working cabin (5). The A-pillar (21) and the B-pillar (22) are respectively installed on the mover ends of the two linear motors (1). A chassis (6) is installed on the working cabin (5), and a microprocessor is provided in the chassis (6).

7. The spring steel wire ultrasonic flaw detection device according to claim 6, characterized in that: The chassis (6) is provided with a clamping portion (7), the clamping portion (7) includes a mounting platform (71), the mounting platform (71) is mounted on the chassis (6) and passes through the working cabin (5), the mounting platform (71) is fixedly connected to a support rod (72), the support rod (72) is fixedly connected to a positioning cylinder (73), the positioning cylinder (73) is provided with six sliding holes in a circular array, the six sliding holes are all slidably connected to a clamping arm (74), and the sides of the six clamping arms (74) that are close to each other are all inclined structures.

8. The spring steel wire ultrasonic flaw detection device according to claim 7, characterized in that: An adjusting portion (8) is provided on the mounting platform (71), and the adjusting portion (8) includes an electric push rod (81). The electric push rod (81) is mounted on the mounting platform (71) and is electrically connected to the microprocessor. The rotating motor (31) is electrically connected to the microprocessor. The movable end of the electric push rod (81) passes through the interior of the positioning cylinder (73) and is fixedly connected to a table-shaped sliding column (82). The table-shaped sliding column (82) is fitted with the inclined surfaces of the six clamping arms (74).

9. The spring steel wire ultrasonic flaw detection device according to claim 8, characterized in that: The center of the positioning cylinder (73) is aligned with the center of the A ring (34), the B ring (43), the electric push rod (81) and the platform-shaped sliding column (82). A spring body (9) is provided on the positioning cylinder (73), and the spring body (9) is in contact with the six clamping arms (74). An isolation cover (10) is connected to the working cabin (5) through a buckle.

10. A positioning method for a spring steel wire ultrasonic flaw detection device, according to the spring steel wire ultrasonic flaw detection device of claim 9, characterized in that: The following steps are involved: S1: After the device is turned on, the microprocessor controls the rotary motor (31) and the linear motor (1) to reset, so that the A ring (34) and the B ring (43) are coaxially aligned, and the A ultrasonic probe (35) and the B ultrasonic probe (44) are pressed into the corresponding special-shaped groove (38) and the rod groove (47), and the laser displacement sensor starts self-test and records the initial zero position data; S2: The spring body (9) is inserted into the positioning tube (73), and the microprocessor drives the electric push rod (81) to extend and retract, driving the table-shaped slide column (82) to move axially along the inside of the positioning tube (73). The inclined surface of the table-shaped slide column (82) squeezes the inclined surface of the six clamping arms (74), causing the clamping arms (74) to expand radially along the sliding hole, thereby clamping the inner side of the spring body (9) to ensure that the spring axis is aligned with the center of the A ring (34) and the B ring (43). The A card block (37) and the B card block (46) are adjusted to cause the A ultrasonic probe (35) and the B ultrasonic probe (44) to contact the outer diameter surface of the spring body (9) through the coupling agent. The six probes are always aligned with the six clamping arms (74) to ensure reflection accuracy, thus providing a good foundation for flaw detection. S3: The linear motor (1) drives the A column (21) and the B column (22) to move synchronously. When the laser displacement sensor detects that the spacing fluctuates due to the spring spiral surface or the vibration of the equipment, the rotary motor (31) starts, drives the A bevel gear (33) to rotate through the A rod (32), and transmits the helical gear 1 (26) on the A column (21) and the helical gear 2 (28) on the rotating rod 2 (27), and synchronously drives the helical gear set on the B column (22), so that the B rod (41) drives the B ring (43) and the A ring (34) to rotate in the opposite direction. The special-shaped groove (38) of the A ring (34) and the rod groove (47) of the B ring (43) avoid each other, ensuring that the A ultrasonic probe (35) and the B ultrasonic probe (44) are separated from each other without interference and the angle is fine-tuned. A detection matrix is ​​formed by six directions to achieve full coverage scanning and anti-interference compensation of the spring body (9) flaw detection. S4: Ultrasonic probe A (35) and ultrasonic probe B (44) alternately emit high-frequency ultrasonic signals, which are transmitted to the spring steel wire through the coupling agent. When an internal defect is encountered, the reflected signal is received by the probe and converted into an electrical signal, which is transmitted to the microprocessor for defect detection and signal acquisition.

Images