Nondestructive testing system and quality control method for high-end carbon spring steel wire production

Abstract

The invention discloses a nondestructive testing system for high-end carbon spring steel wire production and a quality control method.The nondestructive testing system comprises a bottom plate, a box body is installed at the top of the bottom plate, a detection cavity is formed in the side face of the box body, and a real-time detection mechanism is installed in the detection cavity; at least two sets of cleaning mechanisms used for cleaning the surfaces of steel wires are installed at the top of the bottom plate, a guide mechanism is arranged on the side, close to the cleaning mechanisms, of the box body and used for guiding conveying of the steel wires, and a connecting rod is installed on the side, away from the guide mechanism, of the box body and provided with a position detection mechanism. The position detection mechanism is used for positioning the position of the steel wire, a protruding block is installed at one end of the connecting rod, and a marking mechanism used for marking the defect position of the steel wire is installed on one side of the protruding block. The real-time detection mechanism is integrated in front of the take-up station of the production line, so that 100% on-line full detection and accurate positioning of defects are realized, the risks of missing detection and false detection are reduced, and a detection blind area is avoided.

Description

Technical Field

[0001] This invention relates to the field of spring steel wire production technology, specifically to a non-destructive testing system and quality control method for the production of high-end carbon spring steel wire. Background Technology

[0002] As a key basic material in the automotive industry, the quality and reliability of high-end carbon spring steel wire directly determine the performance and safety of end products. During the production process of high-end carbon spring steel wire, defects such as micro-cracks, folds, and peeling on its surface are difficult to detect reliably. These defects are not easily exposed during the subsequent spring winding process, but they can become crack sources under long-term high-stress fatigue conditions, leading to premature spring failure and causing serious automotive safety risks or even large-scale recalls. Therefore, integrating advanced non-destructive testing systems into the production line and implementing full-process quality control has become a key measure to ensure the reliability and service life of high-end spring steel wire.

[0003] Traditional methods for inspecting high-end carbon spring steel wire typically involve sampling inspection and manual visual inspection. Manual visual inspection relies on inspectors observing the wire surface under specific lighting conditions; this method is highly subjective, inefficient, and has virtually no detection capability for micron-level surface defects (such as hairline cracks). Offline sampling inspection involves taking samples from finished products and inspecting them in a laboratory using methods such as microscopy, magnetic particle testing, or eddy current testing. This is a destructive and incomplete inspection, unable to guarantee the quality of every coil or section of wire. Therefore, these inspection methods have blind spots, leading to a high rate of missed defects. These undetected defective wires flow into downstream customers and are used to manufacture spring assemblies; the defects will then develop into fatigue cracks during use, causing component failure. Summary of the Invention

[0004] The purpose of this invention is to provide a non-destructive testing system and quality control method for the production of high-end carbon spring steel wire, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a non-destructive testing system and quality control method for the production of high-end carbon spring steel wire, comprising a base plate, a box body mounted on the top of the base plate, a detection cavity for steel wire to pass through on the side of the box body, a real-time detection mechanism for detecting defects in the steel wire installed in the detection cavity, at least two sets of cleaning mechanisms for cleaning the surface of the steel wire mounted on the top of the base plate, a guide mechanism for guiding the steel wire conveying on the side of the box body close to the cleaning mechanism, a connecting rod mounted on the side of the box body away from the guide mechanism, a position detection mechanism for positioning the position of the steel wire, a protrusion mounted on one end of the connecting rod, and a marking mechanism for marking defects in the steel wire mounted on one side of the protrusion.

[0006] Preferably, the cleaning mechanism includes a mounting block, a rotating block, a lifting plate, and a drive assembly. The mounting block is mounted on the top of the base plate, and two ear blocks are mounted on the top of the mounting block. Two symmetrically arranged rotating blocks are rotatably connected between the two ear blocks. A first arc-shaped scraper is mounted on the side of each of the two rotating blocks that is close to each other. The drive assembly is mounted on the base plate. The lifting plate is located above the rotating blocks and is driven by the drive assembly. A fixing block is mounted on the bottom of the lifting plate, and a second arc-shaped scraper is mounted on the bottom of the fixing block.

[0007] Preferably, a pressure block is installed on the side of the rotating block away from the first arc-shaped scraper, a return spring is installed on the top of the base plate, and a post connected to the return spring is installed on the bottom of the pressure block.

[0008] Preferably, the drive assembly includes a first electric actuator, which is mounted on the top of the base plate. The output shaft of the first electric actuator is connected to a lifting plate. A guide rod is mounted on the top of the base plate, and one end of the lifting plate is movably sleeved on the guide rod.

[0009] Preferably, the guiding mechanism includes a frame, an upper guide wheel, and a lower guide wheel. An mounting plate is installed on one side of the frame, and the mounting plate is installed on the side of the box. The lower guide wheel is rotatably connected to one side of the frame, and the upper guide wheel is movably mounted on the frame.

[0010] Preferably, a sliding groove is provided on the front side of the frame, a slider is slidably connected in the sliding groove, the upper guide wheel is rotatably connected to the slider, and an adjusting bolt with its end extending into the sliding groove is threadedly connected to the top of the frame, the bottom end of the adjusting bolt being rotatably connected to the slider through a bearing.

[0011] Preferably, the position detection mechanism includes a swing arm, a roller, and an encoder. The middle part of the swing arm is rotatably connected to a connecting rod, and a connecting block is hinged to the top of the swing arm. The connecting block is connected to a protrusion through a telescopic spring. A U-shaped block is installed at the bottom of the swing arm, and an encoder is installed on the outer wall of the U-shaped block. The encoder is connected to an encoding shaft that rotates within the cavity of the U-shaped block, and the roller is installed on a surface shaft.

[0012] Preferably, the marking mechanism includes a pigment cylinder and a pressing plate. An assembly block is installed on one side of the protrusion, and the pigment cylinder is mounted on the assembly block. The pigment cylinder has a built-in piston and piston rod. A nozzle communicating with its inner cavity is installed at the bottom end of the pigment cylinder. The pressing plate is rotatably connected to the pigment cylinder and movably connected to the piston rod. A second electric actuator is hinged to one side of the protrusion, and the output shaft of the second electric actuator is movably connected to the pressing plate.

[0013] Preferably, the real-time detection mechanism includes a cylindrical permanent magnet and a magnetically sensitive detection probe, both of which are installed inside the detection cavity, with the magnetically sensitive detection probe located on the side of the permanent magnet away from the cleaning mechanism.

[0014] Another aspect of the present invention provides a quality control method for a non-destructive testing system used in the production of high-end carbon spring steel wire, comprising the following steps:

[0015] Step 1: Before defect detection, the steel wire is passed through a cleaning mechanism, which can scrape off iron filings, magnetic shavings and other adhering substances from the surface of the steel wire.

[0016] Step 2: Pass the steel wire through the detection chamber at a constant speed of 300 meters per minute. The magnetic detection probe scans the surface of the steel wire to detect linear defects such as cracks and folds on and near the surface of the steel wire, and acquires signals in real time.

[0017] Step 3: The acquired signal is fed back to the host computer. The host computer compares the acquired signal with the preset defect threshold. When the signal strength or characteristics exceed the threshold, the system determines that there is a harmful defect at that location.

[0018] Step 4: When a defect is detected, the encoder locates the position of the steel wire, records the distance of the defect from the beginning or end of the roll, and feeds it back to the host computer. After the defect point passes the encoder, the host computer controls the marking mechanism to start and marks a red mark after the defect point.

[0019] Step 5: In subsequent processes, defective sections are removed based on the markings, or the production line is guided to isolate defective rolls separately after winding.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This invention integrates a real-time detection mechanism before the production line take-up station, achieving 100% online full inspection and precise positioning of defects, reducing the risk of missed and false detections, and enabling the discovery of hidden dangers such as cracks that are difficult to detect by manual inspection and some optical inspections, thus avoiding blind spots in the detection.

[0022] 2. This invention introduces a real-time detection mechanism at the end of the production process and automatically locates and marks the detected defects, thereby physically sorting or tracing defective steel wire segments. This achieves integrated automatic completion of "detection-location-marking" without the need for machine downtime or manual intervention, significantly improving production efficiency.

[0023] 3. This invention seamlessly integrates quality monitoring into a high-speed, continuous production line, ensuring uninterrupted production and continuous testing, reducing reliance on extensive manual inspection and saving labor costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the lifting plate of the present invention;

[0026] Figure 3 This is a schematic diagram of the rotating block of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the box body of the present invention;

[0028] Figure 5 This is a cross-sectional structural diagram of the box body of the present invention;

[0029] Figure 6 This is a schematic diagram of the guiding mechanism of the present invention;

[0030] Figure 7 This is a schematic diagram of the connecting rod of the present invention;

[0031] In the diagram: 1. Base plate; 2. Box body; 201. Detection chamber; 3. Cleaning mechanism; 301. Mounting block; 302. Ear block; 303. Rotating block; 304. First arc-shaped scraper; 305. Lifting plate; 306. Fixing block; 307. Second arc-shaped scraper; 308. Pressure block; 309. Return spring; 310. Insert post; 311. First electric push rod; 312. Guide rod; 4. Guide mechanism; 401. Frame; 402. Mounting plate; 403. Upper guide wheel; 404. Lower guide wheel; 4 05. Slide rail; 406. Slider; 407. Adjusting bolt; 408. Fixing plate; 409. Sleeve; 5. Connecting rod; 501. Protrusion; 502. Assembly block; 6. Position detection mechanism; 601. Swing rod; 602. U-shaped block; 603. Roller; 604. Encoder; 605. Connecting block; 606. Telescopic spring; 7. Marking mechanism; 701. Pigment cylinder; 702. Nozzle; 703. Pressing plate; 704. Second electric push rod; 8. Permanent magnet; 9. Magnetic detection probe. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1 - Figure 7 This invention provides a technical solution: a non-destructive testing system and quality control method for the production of high-end carbon spring steel wire, comprising a base plate 1, a box 2 mounted on the top of the base plate 1, a detection cavity 201 for steel wire to pass through on the side of the box 2, a real-time detection mechanism for detecting defects in the steel wire installed in the detection cavity 201, at least two sets of cleaning mechanisms 3 for cleaning the surface of the steel wire mounted on the top of the base plate 1, a guide mechanism 4 for guiding the steel wire conveying on the side of the box 2 close to the cleaning mechanism 3, a connecting rod 5 mounted on the side of the box 2 away from the guide mechanism 4, a position detection mechanism 6 for positioning the position of the steel wire, a protrusion 501 mounted on one end of the connecting rod 5, and a marking mechanism 7 for marking defects in the steel wire mounted on one side of the protrusion 501.

[0034] The detection mechanism, cleaning mechanism 3, position detection mechanism 6, and marking mechanism 7 are all controlled by the same controller.

[0035] In the finished product section of the steel wire production line, the steel wire passes through the detection cavity 201 opened on the box 2 and is wound up by the corresponding winding machine. During the winding process, the steel wire passes through the position real-time detection mechanism at a constant speed.

[0036] Before the steel wire passes through the detection chamber 201, the cleaning mechanism 3 can remove iron filings, magnetic shavings and other adhering substances from the surface of the steel wire to ensure the accuracy of the real-time detection mechanism and create a clean starting point for the detection system.

[0037] When the steel wire is being inspected by the inspection agency, the position detection agency 6 can locate the position of the steel wire in real time. If the steel wire is found to have a defect, the marking agency 7 can mark the defective part of the steel wire. In subsequent processes, the defective section can be removed according to the marking, or the production line can be guided to isolate the defective roll separately after winding.

[0038] The cleaning mechanism 3 includes a mounting block 301, a rotating block 303, a lifting plate 305, and a drive assembly. The mounting block 301 is mounted on the top of the base plate 1. Two ear blocks 302 are mounted on the top of the mounting block 301. Two symmetrically arranged rotating blocks 303 are rotatably connected between the two ear blocks 302. A first arc-shaped scraper 304 is mounted on the side of the two rotating blocks 303 that are close to each other. The drive assembly is mounted on the base plate 1. The lifting plate 305 is located above the rotating blocks 303 and is driven by the drive assembly. A fixing block 306 is mounted on the bottom of the lifting plate 305. A second arc-shaped scraper 307 is mounted on the bottom of the fixing block 306.

[0039] The cleaning mechanism 3 is equipped with at least 2 sets, which can effectively clean the iron filings and other attachments on the surface of the steel wire. It can also be used in rotation when cleaning the steel wire, that is, when one set is in use, the other set can be used for maintenance.

[0040] The rotating block 303 is C-shaped, and the first arc-shaped scraper 304 and the second arc-shaped scraper 307 can be made of sponge.

[0041] The steel wire can pass through the area between the two first arc-shaped scrapers 304. By driving the lifting plate 305 to move down, the second arc-shaped scraper 307 can extend into the inner cavity of the two rotating blocks 303. When the bottom of the lifting plate 305 contacts and presses the two rotating blocks 303, the two rotating blocks 303 can rotate to the side that is close to each other, so that the two first arc-shaped scrapers 304 can hold the steel wire. At the same time, the bottom of the second arc-shaped scraper 307 can also contact the steel wire. When the steel wire is conveyed to the box 2, the surface of the steel wire can be cleaned by the first arc-shaped scraper 304 and the second arc-shaped scraper 307 to ensure a smooth surface.

[0042] A pressure block 308 is installed on the side of the rotating block 303 away from the first arc-shaped scraper 304. A reset spring 309 is installed on the top of the base plate 1. A plug 310 connected to the reset spring 309 is installed on the bottom of the pressure block 308.

[0043] The top end of the reset spring 309 is sleeved on the insert post 310. When the two rotating blocks 303 rotate toward the side that is close to each other, the reset spring 309 is stretched inward. When the lifting plate 305 moves upward and away from the two rotating blocks 303, the reset spring 309 can drive the rotating blocks 303 to reset, so that the two first arc-shaped scrapers 304 no longer contact the steel wire.

[0044] The drive assembly includes a first electric actuator 311, which is mounted on the top of the base plate 1. The output shaft of the first electric actuator 311 is connected to the lifting plate 305. A guide rod 312 is mounted on the top of the base plate 1, and one end of the lifting plate 305 is movably sleeved on the guide rod 312.

[0045] The first electric actuator 311 is used to drive the lifting plate 305 to move up and down along the guide rod 312. When the lifting plate 305 drives the second arc-shaped scraper 307 away from the rotating block 303, the first arc-shaped scraper 304 and the second arc-shaped scraper 307 do not contact the steel wire.

[0046] The guiding mechanism 4 includes a frame 401, an upper guide wheel 403 and a lower guide wheel 404. An mounting plate 402 is installed on one side of the frame 401. The mounting plate 402 is installed on the side of the box 2. The lower guide wheel 404 is rotatably connected to one side of the frame 401. The upper guide wheel 403 is movably mounted on the frame 401.

[0047] Before the steel wire enters the detection chamber 201, the steel wire can pass through the area between the upper guide wheel 403 and the lower guide wheel 404. At the same time, the lower guide wheel 404 contacts the steel wire and can guide the conveying of the steel wire.

[0048] A fixing plate 408 with a through hole is installed on the side of the frame 401 away from the detection chamber 201. A sleeve 409 with an inner cavity communicating with the through hole is installed on the fixing plate 408. A cleaning sponge that contacts the steel wire can be fitted on the inner wall of the sleeve 409. When the steel wire passes through the sleeve 409, the cleaning sponge can play a second cleaning role, further ensuring that the surface of the steel wire is clean.

[0049] The front side of the frame 401 is provided with a sliding groove 405, and a slider 406 is slidably connected in the sliding groove 405. The upper guide wheel 403 is rotatably connected to the slider 406. The top of the frame 401 is threadedly connected with an adjusting bolt 407 whose end extends into the sliding groove 405. The bottom end of the adjusting bolt 407 is rotatably connected to the slider 406 through a bearing.

[0050] By turning the adjusting bolt 407, the slider 406 can slide in the groove 405. At this time, the upper guide wheel 403 can adjust its height relative to the lower guide wheel 404. When the upper guide wheel 403 contacts the steel wire, the upper guide wheel 403 and the lower guide wheel 404 cooperate to straighten the steel wire, which is beneficial for subsequent defect detection of the steel wire.

[0051] The position detection mechanism 6 includes a swing arm 601, a roller 603, and an encoder 604. The middle part of the swing arm 601 is rotatably connected to the connecting rod 5. The top end of the swing arm 601 is hinged to a connecting block 605. The connecting block 605 is connected to a protrusion 501 through a telescopic spring 606. A U-shaped block 602 is installed at the bottom end of the swing arm 601. An encoder 604 is installed on the outer wall of the U-shaped block 602. The encoder 604 is connected to an encoding shaft that rotates within the cavity of the U-shaped block 602. The roller 603 is mounted on a surface shaft.

[0052] Because the connecting block 605 is connected to the protrusion 501 through the telescopic spring 606, the swing rod 601 will be subjected to the force of the telescopic spring 606. After the steel wire passes through the detection cavity 201, the bottom of the roller 603 can contact the steel wire, and the encoder 604 can accurately position the position of the steel wire.

[0053] The marking mechanism 7 includes a pigment cylinder 701 and a pressing plate 703. An assembly block 502 is installed on one side of the protrusion 501. The pigment cylinder 701 is mounted on the assembly block 502. The pigment cylinder 701 has a built-in piston and piston rod. A nozzle 702 communicating with its inner cavity is installed at the bottom end of the pigment cylinder 701. The pressing plate 703 is rotatably connected to the pigment cylinder 701. The pressing plate 703 is movably connected to the piston rod. A second electric actuator 704 is hinged to one side of the protrusion 501. The output shaft of the second electric actuator 704 is movably connected to the pressing plate 703.

[0054] The piston rod is hinged to the bottom end and the pressing plate 703 is hinged to the top end. The inner cavity of the pigment cylinder 701 stores red pigment. The pressure inside the pigment cylinder 701 is less than the external pressure, that is, the pigment in the pigment cylinder 701 will not drip through the nozzle 702 when it is not subjected to the force of the piston.

[0055] When defects such as cracks are detected in the steel wire, the second electric actuator 704 drives the pressing plate 703 to move. The pressing plate 703 can drive the piston rod and piston to move, so as to squeeze out the pigment in the pigment cylinder 701 and spray it onto the defective part of the steel wire through the nozzle 702.

[0056] The real-time detection mechanism includes a cylindrical permanent magnet 8 and a magnetic detection probe 9. Both the permanent magnet 8 and the magnetic detection probe 9 are installed in the detection cavity 201. The magnetic detection probe 9 is located on the side of the permanent magnet 8 away from the cleaning mechanism 3.

[0057] The magnetic detection probe 9 can be a Hall sensor or other magnetic detection element. When the steel wire passes through the cylindrical permanent magnet 8, the steel wire is magnetized to near saturation. If the steel wire material is uniform and continuous, the magnetic lines of force will be basically confined inside the steel wire. If there are defects in the steel wire, the magnetic permeability at the defect location will be much lower than that at the normal location, resulting in increased magnetic resistance. Some magnetic lines of force will "leak" out from the defect location, forming a detectable leakage magnetic field. The magnetic detection probe 9 can capture the leakage magnetic field of the steel wire.

[0058] The permanent magnet 8 and the magnetically sensitive detection probe 9 can perform non-destructive testing on the steel wire.

[0059] An audible and visual alarm that works with the magnetic detection probe 9 can be installed on the housing 2. When a defect in the steel wire is detected, the audible and visual alarm will be activated to alert the operator.

[0060] Another aspect of the present invention provides a quality control method for a non-destructive testing system used in the production of high-end carbon spring steel wire, comprising the following steps:

[0061] Step 1: Before defect detection, the steel wire is passed through the cleaning mechanism 3. The cleaning mechanism 3 can scrape off iron filings, magnetic shavings and other adhering substances from the surface of the steel wire.

[0062] Step 2: Pass the steel wire through the detection chamber 201 at a constant speed of 300 meters per minute. The magnetic detection probe 9 scans the surface of the steel wire to detect linear defects such as cracks and folds on and near the surface of the steel wire, and acquires signals in real time.

[0063] Step 3: The acquired signal is fed back to the host computer. The host computer compares the acquired signal with the preset defect threshold. When the signal strength or characteristics exceed the threshold, the system determines that there is a harmful defect at that location.

[0064] Step 4: When a defect is detected, encoder 604 locates the position of the steel wire, records the distance of the defect from the beginning or end of the roll, and feeds it back to the host computer. After the defect point passes encoder 604, the host computer controls the marking mechanism 7 to start and mark a red mark behind the defect point.

[0065] Step 5: In subsequent processes, defective sections are removed based on the markings, or the production line is guided to isolate defective rolls separately after winding.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-destructive testing system for the production of high-end carbon spring steel wire, comprising a base plate (1), characterized in that: A box (2) is installed on the top of the base plate (1). A detection cavity (201) for steel wire to pass through is opened on the side of the box (2). A real-time detection mechanism for detecting defects in the steel wire is installed in the detection cavity (201). At least two cleaning mechanisms (3) for cleaning the surface of the steel wire are installed on the top of the base plate (1). A guide mechanism (4) is provided on the side of the box (2) close to the cleaning mechanism (3). The guide mechanism (4) is used to guide the steel wire to be transported. A connecting rod (5) is installed on the side of the box (2) away from the guide mechanism (4). A position detection mechanism (6) is provided on the connecting rod (5). The position detection mechanism (6) is used to locate the position of the steel wire. A protrusion (501) is installed at one end of the connecting rod (5). A marking mechanism (7) for marking the defect of the steel wire is installed on one side of the protrusion (501).

2. The non-destructive testing system for the production of high-end carbon spring steel wire according to claim 1, characterized in that: The cleaning mechanism (3) includes a mounting block (301), a rotating block (303), a lifting plate (305), and a drive assembly. The mounting block (301) is mounted on the top of the base plate (1). Two ear blocks (302) are mounted on the top of the mounting block (301). Two symmetrically arranged rotating blocks (303) are rotatably connected between the two ear blocks (302). A first arc-shaped scraper (304) is mounted on the side of the two rotating blocks (303) that are close to each other. The drive assembly is mounted on the base plate (1). The lifting plate (305) is located above the rotating block (303) and is driven by the drive assembly. A fixing block (306) is mounted on the bottom of the lifting plate (305). A second arc-shaped scraper (307) is mounted on the bottom of the fixing block (306).

3. The non-destructive testing system for the production of high-end carbon spring steel wire according to claim 2, characterized in that: A pressure block (308) is installed on the side of the rotating block (303) away from the first arc-shaped scraper (304). A reset spring (309) is installed on the top of the base plate (1). A plug (310) connected to the reset spring (309) is installed on the bottom of the pressure block (308).

4. The non-destructive testing system for the production of high-end carbon spring steel wire according to claim 2, characterized in that: The drive assembly includes a first electric actuator (311), which is mounted on the top of the base plate (1). The output shaft of the first electric actuator (311) is connected to the lifting plate (305). A guide rod (312) is mounted on the top of the base plate (1), and one end of the lifting plate (305) is movably sleeved on the guide rod (312).

5. The non-destructive testing system for the production of high-end carbon spring steel wire according to claim 1, characterized in that: The guiding mechanism (4) includes a frame (401), an upper guide wheel (403) and a lower guide wheel (404). A mounting plate (402) is installed on one side of the frame (401). The mounting plate (402) is installed on the side of the box (2). The lower guide wheel (404) is rotatably connected to one side of the frame (401). The upper guide wheel (403) is movably mounted on the frame (401).

6. The non-destructive testing system for the production of high-end carbon spring steel wire according to claim 5, characterized in that: The front side of the frame (401) is provided with a slide groove (405), and a slider (406) is slidably connected in the slide groove (405). The upper guide wheel (403) is rotatably connected to the slider (406). The top of the frame (401) is threadedly connected with an adjusting bolt (407) whose end extends into the slide groove (405). The bottom end of the adjusting bolt (407) is rotatably connected to the slider (406) through a bearing.

7. The non-destructive testing system for the production of high-end carbon spring steel wire according to claim 1, characterized in that: The position detection mechanism (6) includes a swing rod (601), a roller (603) and an encoder (604). The middle part of the swing rod (601) is rotatably connected to the connecting rod (5). The top end of the swing rod (601) is hinged to a connecting block (605). The connecting block (605) is connected to a protrusion (501) through a telescopic spring (606). A U-shaped block (602) is installed at the bottom end of the swing rod (601). An encoder (604) is installed on the outer wall of the U-shaped block (602). The encoder (604) is connected to an encoding shaft that rotates in the inner cavity of the U-shaped block (602). The roller (603) is installed on the surface shaft.

8. The non-destructive testing system for the production of high-end carbon spring steel wire according to claim 1, characterized in that: The marking mechanism (7) includes a pigment cylinder (701) and a pressing plate (703). An assembly block (502) is installed on one side of the protrusion (501). The pigment cylinder (701) is mounted on the assembly block (502). The pigment cylinder (701) has a built-in piston and piston rod. A nozzle (702) communicating with its inner cavity is installed at the bottom end of the pigment cylinder (701). The pressing plate (703) is rotatably connected to the pigment cylinder (701). The pressing plate (703) is movably connected to the piston rod. A second electric push rod (704) is hinged to one side of the protrusion (501). The output shaft of the second electric push rod (704) is movably connected to the pressing plate (703).

9. A non-destructive testing system for the production of high-end carbon spring steel wire according to claim 1, characterized in that: The real-time detection mechanism includes a cylindrical permanent magnet (8) and a magnetic detection probe (9). Both the permanent magnet (8) and the magnetic detection probe (9) are installed in the detection cavity (201). The magnetic detection probe (9) is located on the side of the permanent magnet (8) away from the cleaning mechanism (3).

10. A quality control method based on the non-destructive testing system for the production of high-end carbon spring steel wire according to any one of claims 1 to 9, characterized in that: Includes the following steps: Step 1: Before defect detection, the steel wire is passed through the cleaning mechanism (3). The cleaning mechanism (3) can scrape off iron filings, magnetic shavings and other adhering substances on the surface of the steel wire. Step 2: Pass the steel wire through the detection chamber (201) at a constant speed of 300 m / min. The magnetic detection probe (9) scans the surface of the steel wire to detect linear defects such as cracks and folds on and near the surface of the steel wire and collects signals in real time. Step 3: The collected signal is fed back to the host computer. The host computer compares the collected signal with the preset defect threshold. When the signal strength or characteristics exceed the threshold, the system determines that there is a harmful defect at that location. Step 4: When a defect is detected, the encoder (604) locates the position of the steel wire, records the distance of the defect from the beginning or end of the roll, and feeds it back to the host computer. After the defect point passes the encoder (604), the host computer controls the marking mechanism (7) to start and mark a red mark after the defect point. Step 5: In subsequent processes, defective sections are removed based on the markings, or the production line is guided to isolate defective rolls separately after winding.

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