A high-speed flaw detection device for internal defects of copper rods and its working method

Abstract

The present invention relates to the field of metal flaw detection technology, and in particular to a high-speed flaw detection device for internal defects in a copper rod and its working method. The device comprises: a cleaning mechanism for removing impurities from the surface of the copper rod; a flaw detection mechanism for flaw detection on the copper rod; two limit mechanisms arranged on both sides of the flaw detection mechanism for limiting the vibration of the copper rod; the cleaning mechanism comprises: a fixed seat, independently fixed; a rotating seat, driven by a motor to rotate on the fixed seat; a plurality of rotating blocks, all rotatably arranged on the end face of the rotating seat and distributed circumferentially along the rotating seat; a driving mechanism for driving the plurality of rotating blocks to rotate synchronously; a plurality of air knives, respectively arranged on the plurality of rotating blocks; the air knives forming a certain angle with the axial direction of the copper rod; and when in operation, the air outlets of the air knives are aligned tangentially with the outer side surface of the copper rod. The present invention can effectively solve the problem in existing flaw detection technologies that impurities are easily left on the copper rod during flaw detection, thereby affecting the accuracy of flaw detection.

Description

Technical Field

[0001] The present invention relates to the technical field of metal flaw detection, and in particular to a high-speed flaw detection device for internal defects of a copper rod and a working method thereof. Background Art

[0002] During the copper rod production process, internal flaw detection is required to ensure that there are no cracks or voids inside the copper rod. Copper rods move continuously and at high speed during production, so eddy current detection or ultrasonic detection technology is typically used to achieve high-speed flaw detection of copper rods. These technologies typically use electromagnetic induction or vibration wave changes to reflect the shape of the copper rod, thereby determining whether it has defects. In existing flaw detection operations, since copper rods undergo processing and cleaning, impurities such as copper chips and water droplets are easily retained on the surface of the copper rods, which can have a significant impact on the flaw detection of the copper rods. Summary of the Invention

[0003] The present invention provides a high-speed flaw detection device for internal defects of a copper rod and a working method thereof, which can effectively solve the problem in the background art that impurities are easily left on the copper rod, thereby affecting the accuracy of flaw detection.

[0004] The present invention provides a high-speed flaw detection device for internal defects of a copper rod, comprising:

[0005] Cleaning mechanism, used to remove impurities on the surface of the copper rod;

[0006] Flaw detection mechanism, used for flaw detection of copper rods;

[0007] Two limit mechanisms are set on both sides of the flaw detection mechanism to limit the shaking of the copper rod;

[0008] Cleaning agencies include:

[0009] Fixed seat, independent fixed setting;

[0010] The rotating seat is driven by the motor to rotate on the fixed seat;

[0011] A plurality of rotating blocks are rotatably arranged on the end surface of the rotating seat and distributed along the circumference of the rotating seat;

[0012] A driving mechanism, used to drive multiple rotating blocks to rotate synchronously;

[0013] Multiple air knives are respectively set on multiple rotating blocks; the air knives form a certain angle with the axial direction of the copper rod;

[0014] When working, the air outlet of the wind knife is aligned with the outer side of the copper rod.

[0015] Furthermore, the limiting mechanism includes two roller groups, each roller group is provided with two clamping rollers, the copper rod passes through the two clamping rollers, and the two clamping rollers in one roller group are distributed vertically, and the two clamping rollers in the other roller group are distributed horizontally.

[0016] Furthermore, a first air channel is provided on the rotating seat, a connecting groove is provided on the end surface of the rotating block, and a second air channel is also provided on the rotating block; the first air channel is connected to the connecting groove, and both ends of the second air channel are respectively connected to the connecting groove and the air knife.

[0017] Furthermore, the distance between the connecting groove and the rotating axis of the rotating block is smaller than the distance between the wind knife and the rotating axis of the rotating block.

[0018] Furthermore, the driving mechanism includes:

[0019] The sleeve is sleeved on the rotating seat; a plurality of guide grooves are provided on the end surface of the sleeve;

[0020] A plurality of guide posts, each of which passes through a corresponding guide slot, and an end portion is fixedly mounted on the rotating block.

[0021] Furthermore, a slide groove is provided on the side of the sleeve, and the slide groove forms a certain angle with the axis of the copper rod;

[0022] A sliding block is arranged on the rotating seat. The sliding block slides along the axial direction of the copper rod, and one end of the sliding block extends into the sliding groove.

[0023] Furthermore, a rotating shaft is provided on the rotating seat, a threaded section is provided on the rotating shaft; a threaded hole is provided on the sliding block; and the threaded section is engaged with the threaded hole.

[0024] Furthermore, it also includes a plurality of positioning mechanisms, each positioning mechanism including:

[0025] The connecting block is detachably connected to the rotating block and rotates synchronously;

[0026] The positioning bar is fixedly installed on the connecting block, and the side of the positioning bar facing the copper rod is aligned with the air outlet of the air knife.

[0027] Furthermore, a metal sheet is provided on the positioning bar, and a side surface of the metal sheet is flush with a side of the positioning bar facing the copper rod.

[0028] The present invention also provides a method for using a high-speed flaw detection device for internal defects of a copper rod, which is used for the above-mentioned high-speed flaw detection device for internal defects of a copper rod, comprising:

[0029] S10: The driving mechanism drives the multiple rotating blocks to rotate outward;

[0030] S20: Pass the copper rod through the cleaning mechanism and the flaw detection mechanism, and fix the copper rod with a limiting mechanism;

[0031] S30: The driving mechanism drives the multiple rotating blocks to rotate outward so that the air outlet of the air knife is aligned with the tangential direction of the outer side surface of the copper rod;

[0032] S40: Supply air into the flaw detection mechanism to make the air knife blow outward, start the motor to drive the rotating seat to rotate, so that the air knife rotates along the copper rod in a circular direction to blow off impurities on the copper rod; the copper rod moves forward, so that the flaw detection mechanism continues to perform flaw detection on the copper rod.

[0033] The technical solution of the present invention can achieve the following technical effects:

[0034] This device features an improved cleaning mechanism to ensure that no impurities remain on the copper rod, potentially affecting detection accuracy. During operation, the drive mechanism adjusts the rotating block's angle of rotation, aligning the air knife outlet tangentially with the copper rod's outer surface. This ensures that the airflow's thrust on impurities is always tangential to the rod's outer surface, effectively removing them. The motor continuously drives the rotating base, rotating the block and air knife around the copper rod. This allows the airflow to circumvent the rod's entire outer surface, ensuring rapid cleaning of the entire surface. Furthermore, the rotating block's design allows the air knife's direction to be adjusted, accommodating copper rods of various diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 Schematic diagram of the structure of the high-speed flaw detection equipment for internal defects of copper rods in the present invention;

[0037] Figure 2 Schematic diagram of the structure of the limiting mechanism of the present invention;

[0038] Figure 3 Schematic diagram of the structure of the cleaning mechanism of the present invention;

[0039] Figure 4 This is a front view of the cleaning mechanism of the present invention;

[0040] Figure 5 A side sectional view of the cleaning mechanism of the present invention;

[0041] Figure 6 This is a schematic diagram of the structure of the cleaning mechanism of the present invention after the sleeve is removed;

[0042] Figure 7 This is a schematic diagram of the structure of the cleaning mechanism of the present invention after it is disassembled as a whole;

[0043] Figure 8 This is a front structural diagram of the transfer block of the present invention;

[0044] Figure 9 This is a schematic diagram of the back structure of the transfer block of the present invention;

[0045] Figure 10 It is a structural schematic diagram of the positioning mechanism in the present invention.

[0046] Figure numerals: 1. flaw detection mechanism; 2. limiting mechanism; 21. clamping roller; 3. fixed seat; 4. rotating seat; 41. first air duct; 42. sliding block; 43. rotating shaft; 5. rotating block; 51. connecting groove; 52. second air duct; 6. driving mechanism; 61. sleeve; 61a. guide groove; 61b. slide groove; 62. guide column; 7. wind knife; 8. positioning mechanism; 81. connecting block; 82. positioning strip; 83. metal sheet. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0048] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; they may refer to mechanical or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0050] The present invention relates to a high-speed flaw detection device for internal defects of a copper rod. Figure 1 As shown, its main structure includes:

[0051] The cleaning mechanism can blow air to the surface of the copper rod to remove copper chips, residual water and other impurities on the surface of the copper rod;

[0052] The flaw detection mechanism 1 may be an ultrasonic flaw detector or an eddy current flaw detector, which can be used to detect flaws in copper rods;

[0053] Two limit mechanisms 2 are provided on both sides of the flaw detection mechanism 1 to limit the shaking of the copper rod, thereby preventing the shaking of the copper rod from affecting the detection data of the flaw detection mechanism 1 and causing misjudgment.

[0054] The specific structure of the cleaning mechanism is as follows Figures 3 to 10 Shown, including:

[0055] The fixing seat 3 is independently fixed and used to carry other components of the cleaning mechanism; a through hole is provided in the center of the fixing seat 3 for the copper rod to pass through;

[0056] The rotating seat 4 is driven by a motor to rotate on the fixed seat 3; the center of the rotating seat 4 is also provided with a through hole for the copper rod to pass through;

[0057] Multiple rotating blocks 5 are rotatably arranged on the end surface of the rotating base 4. The distance between the rotating axis of each rotating block 5 and the axis of the copper rod is equal, and the multiple rotating blocks 5 are distributed in a circumferential array along the rotating base 4;

[0058] A driving mechanism 6 is used to drive the multiple rotating blocks 5 to rotate synchronously;

[0059] A plurality of wind knives 7 are respectively arranged on a plurality of rotating blocks 5; the wind knives 7 form a certain angle with the axial direction of the copper rod, so that the air flow blown by the wind knives 7 can flow obliquely toward the copper rod.

[0060] The airflow from the traditional air blowing cleaning structure is directly facing the copper rod, and the center of the airflow is facing the axis of the copper rod. Therefore, if the impurities are in the middle of the axis, the airflow will push the copper chips and other impurities closer to the surface of the copper rod, making them difficult to blow away. When some impurities are located at the position of concave defects on the surface of the copper rod, it is difficult for the airflow to blow them out; and the area that the airflow can reach is limited. The cylindrical side of the copper rod easily blocks the airflow, and the impurities in the part that cannot be blown by the airflow are more difficult to remove.

[0061] This cleaning mechanism can better solve the above problems. Its specific working process and principle are as follows:

[0062] When the cleaning mechanism is in operation, the rotation angle of the rotating block 5 is adjusted by the driving mechanism 6, so that the air outlet of the wind knife 7 is aligned with the tangential direction of the outer side of the copper rod. The thrust of the airflow on the impurities is always in the tangential direction of the outer side of the copper rod, which can better blow away the impurities. The motor will continuously drive the rotating base 4 to rotate, so that the rotating block 5 and the wind knife 7 can rotate continuously around the copper rod, so that the airflow blown by the wind knife 7 can rotate around the copper rod and traverse the entire outer side of the copper rod in an annular direction, thereby ensuring a rapid cleaning effect on the entire outer surface of the copper rod. At the same time, the rotatable design of the rotating block 5 makes the direction of the wind knife 7 adjustable, so that it can adapt to copper rods of various diameters.

[0063] There are many existing implementation methods of the limiting mechanism 2. This device provides a relatively low-cost limiting mechanism 2, such as Figure 2 As shown, it includes two roller groups, each roller group is provided with two clamping rollers 21, the two clamping rollers 21 can move away from and approach each other, and their positions can be locked. During installation, the two clamping rollers 21 are moved away from each other, and after the copper rod passes through the two clamping rollers 21, the two clamping rollers 21 are moved closer to each other to clamp the copper rod, and then the positions of the two clamping rollers 21 are locked, thereby restricting the copper rod; when the roller groups are set, the two clamping rollers 21 in one roller group are distributed vertically, and the two clamping rollers 21 in the other roller group are distributed horizontally, so that the two roller groups can limit the shaking of the copper rod in the corresponding directions from the vertical and horizontal directions respectively.

[0064] In existing structures, the air knife 7 is usually supplied with air through a pipe. However, in this device, since the air knife 7 needs to rotate around the copper rod, the existing air supply method will cause the pipe to be entangled with the copper rod. To avoid the above problem, this device has a new design for the air supply structure. The specific structure is as follows:

[0065] A first air duct 41 is provided on the rotating seat 4, one end of the first air duct 41 moves away from the rotating block 5, and an annular groove is formed at the distal end. This only requires a through hole to be provided on the fixed seat 3 or other external equipment, and the annular groove is extended into the through hole. Then an air duct connecting the pipeline is provided on the side of the through hole. The air flow will pass through the air duct to first reach the position of the annular groove at the end of the first air duct 41, and then enter the first air duct 41, so that air can be supplied to the first air duct 41 without the pipeline moving; a connecting groove 51 is provided on the end face of the rotating block 5, and the connecting groove 51 is arc-shaped, and the center point of the arc is located on the rotating axis of the rotating block 5. The first air duct 41 is connected to the connecting groove 51, and a second air duct 52 is also provided on the rotating block 5, and the two ends of the second air duct 52 are respectively connected to the connecting groove 51 and the wind knife 7, so that during the rotation of the rotating block 5, the connecting groove 51 can be connected to the first air duct 41 to realize air supply.

[0066] It is preferred that the distance between the connecting groove 51 and the rotation axis of the rotating block 5 is smaller than the distance between the wind knife 7 and the rotation axis of the rotating block 5, that is, the distance of the arc radius of the connecting groove 51 is smaller than the rotation radius of the wind knife 7. Under this structure, even if the wind knife 7 needs to move a large distance, the arc length of the connecting groove 51 can still be relatively shortened, thereby reducing the wear on the sealing ring arranged around the connecting groove 51.

[0067] The driving mechanism 6 can be implemented in various existing forms such as connecting rods and motors. However, considering that the rotating seat 4 and the rotating block 5 need to rotate around the copper rod, the complex structure is not conducive to such rotation requirements. Therefore, a simpler driving mechanism 6 is designed for this device, including:

[0068] The sleeve 61 is sleeved on the rotating seat 4; a plurality of guide grooves 61a are provided on the end surface of the sleeve 61, and the distance between one end of the guide groove 61a and the axis of the copper rod is smaller than the distance between the other end and the axis of the copper rod;

[0069] There are multiple guide columns 62, each guide column 62 passes through a corresponding guide groove 61a, and the end is installed on the rotating block 5 by a fixing method such as threaded connection after passing through the guide groove 61a, and the connection between the guide column 62 and the rotating block 5 should be as far away from the rotating axis of the rotating block 5 as possible.

[0070] In this structure, as long as the sleeve 61 and the rotating base 4 rotate relative to each other, the guide groove 61 a will push the guide post 62 to the corresponding position, and the guide post 62 will drive the rotating block 5 to rotate.

[0071] The device also has a corresponding simple design for the structure that drives the sleeve 61 and the rotating seat 4 to rotate relative to each other. The specific structure includes:

[0072] A slide groove 61b is provided on the side of the sleeve 61, and the slide groove 61b forms a certain angle with the axis of the copper rod;

[0073] A sliding block 42 is provided on the rotating seat 4. The sliding block 42 slides along the axial direction of the copper rod, and one end of the sliding block 42 extends into the sliding groove 61b.

[0074] When the sliding block 42 moves, the side wall of the sliding block 42 will push the sliding groove 61b, thereby causing relative rotation between the sleeve 61 and the rotating seat 4. This structure can convert the rotation demand of the sleeve 61 into the sliding demand of the sliding block 42. Even if the rotation angle is small, the sliding distance of the sliding block 42 after conversion is relatively large, thereby achieving precise control of the rotation amount of the sleeve 61, and then achieving precise control of the rotation amount of the rotating block 5.

[0075] The sliding of the sliding block 42 can be achieved through the following structure: a rotating shaft 43 is set on the rotating seat 4, and a threaded section is set on the rotating shaft 43; a threaded hole is set on the sliding block 42; the threaded section is engaged with the threaded hole to form a screw slider mechanism, so that by rotating the rotating shaft 43, the sliding of the sliding block 42 can be driven, and the sliding of the sliding block 42 cannot drive the rotating shaft 43 in turn, thereby realizing self-locking of the rotation angle of the sleeve 61.

[0076] Since it is difficult to observe with the naked eye whether the air outlet of the wind knife 7 is tangent to the side of the copper rod, the present device also includes a plurality of positioning mechanisms 8 for positioning the rotation angle of the rotating block 5. Each positioning mechanism 8 includes:

[0077] The connecting block 81 needs to be detachably connected to the rotating block 5 and rotate synchronously. One implementation structure is to provide an outwardly protruding connecting block on the rotating block 5. This connecting block is coaxial with the rotation axis of the rotating block 5. The connecting block 81 is sleeved on the connecting block, and then screws or flat fitting are used to ensure that the connecting block 81 and the rotating block 5 cannot rotate relative to each other.

[0078] The positioning bar 82 is fixedly mounted on the connecting block 81 , and the side of the positioning bar 82 facing the copper rod is aligned with the air outlet of the air knife 7 .

[0079] When the position of the rotating block 5 needs to be adjusted, a positioning mechanism 8 can be installed on the device. Two or more positioning mechanisms 8 can be installed as needed. As the rotating block 5 rotates, the positioning bars 82 can also rotate together. When the positioning bars 82 stick to the side of the copper rod, the rotating block can no longer rotate. At this time, the positioning of the wind knife 7 is completed, and then the positioning mechanisms 8 can be removed.

[0080] Of course, if only the above-mentioned physical limiting form is used, then when the positioning bar 82 just sticks to the copper rod, the person may not notice it and will continue to apply force to the rotating block 5, which is easy to cause pressure damage to the surface of the copper rod. Therefore, this device has also been optimized: the connecting block 81 and the positioning bar 82 are made of non-conductive materials such as plastic, and a metal sheet 83 is set on the positioning bar 82. The side of the metal sheet 83 is flush with the side of the positioning bar 82 facing the copper rod. When working, the metal sheet 83 of one positioning mechanism 8 is connected to the electrical signal generating device, and the metal sheet 83 of the other positioning mechanism 8 is connected to the electrical signal receiving device. At the moment when each positioning bar 82 contacts the copper rod, the electrical signal can be conducted through the copper rod, so that the electrical signal receiving device receives the electrical signal, and then sends a signal in time to stop the rotation of the rotating block 5, thereby avoiding pressure damage to the surface of the copper rod.

[0081] The present invention also relates to a method for using a high-speed flaw detection device for internal defects of a copper rod, which is used for the above-mentioned high-speed flaw detection device for internal defects of a copper rod, comprising:

[0082] S10: The driving mechanism 6 drives the plurality of rotating blocks 5 to rotate outward;

[0083] S20: Pass the copper rod through the cleaning mechanism and the flaw detection mechanism 1, and fix the copper rod with the limiting mechanism 2;

[0084] S30: The driving mechanism 6 drives the multiple rotating blocks 5 to rotate outward, so that the air outlet of the wind knife 7 is aligned with the outer side surface of the copper rod;

[0085] S40: Supply air into the flaw detection mechanism 1 so that the air knife 7 can blow air outward, start the motor to drive the rotating seat 4 to rotate, so that the air knife 7 rotates circumferentially along the copper rod to blow away impurities on the copper rod; the copper rod moves forward, so that the flaw detection mechanism 1 continues to perform flaw detection on the copper rod.

[0086] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed flaw detection device for internal defects of copper rods, characterized in that: include: Cleaning mechanism, used to remove impurities on the surface of the copper rod; A flaw detection mechanism (1) is used for performing flaw detection on the copper rod; Two limiting mechanisms (2) are arranged on both sides of the flaw detection mechanism (1) and are used to limit the shaking of the copper rod; The cleaning mechanism comprises: A fixed seat (3), independently fixed; A rotating seat (4) is driven by a motor to rotate on the fixed seat (3); A plurality of rotating blocks (5) are all rotatably arranged on the end surface of the rotating seat (4) and are distributed circumferentially along the rotating seat (4); A driving mechanism (6) for driving the plurality of rotating blocks (5) to rotate synchronously; A plurality of wind knives (7) are respectively arranged on the plurality of rotating blocks (5); the wind knives (7) form a certain angle with the axial direction of the copper rod; When working, the air outlet of the wind knife (7) is aligned with the outer side surface of the copper rod; Wherein, a first air channel (41) is provided on the rotating seat (4), a connecting groove (51) is provided on the end surface of the rotating block (5), and a second air channel (52) is also provided on the rotating block (5); the first air channel (41) is connected to the connecting groove (51), and the two ends of the second air channel (52) are respectively connected to the connecting groove (51) and the air knife (7); The driving mechanism (6) comprises: A sleeve (61) is sleeved on the rotating seat (4); a plurality of guide grooves (61a) are provided on the end surface of the sleeve (61); A plurality of guide posts (62), each of the guide posts (62) passing through a corresponding guide slot (61a), and having an end portion fixedly mounted on the rotating block (5); A sliding groove (61b) is provided on the side of the sleeve (61), and the sliding groove (61b) forms a certain angle with the axis of the copper rod; A sliding block (42) is provided on the rotating seat (4), and the sliding block (42) slides axially along the copper rod, and one end of the sliding block (42) extends into the sliding groove (61b); A rotating shaft (43) is provided on the rotating seat (4), and a threaded section is provided on the rotating shaft (43); a threaded hole is provided on the sliding block (42); and the threaded section is engaged with the threaded hole.

2. The high-speed flaw detection equipment for internal defects of copper rods according to claim 1, characterized in that: The limiting mechanism (2) comprises two roller groups, each roller group is provided with two clamping rollers (21), the copper rod passes through the two clamping rollers (21), and the two clamping rollers (21) in one roller group are vertically distributed, and the two clamping rollers (21) in the other roller group are horizontally distributed.

3. The high-speed flaw detection equipment for internal defects of copper rods according to claim 1, characterized in that: The distance between the connecting groove (51) and the rotation axis of the rotating block (5) is smaller than the distance between the wind knife (7) and the rotation axis of the rotating block (5).

4. The copper rod internal defect high-speed flaw detection equipment according to claim 1, characterized in that: It also includes a plurality of positioning mechanisms (8), each positioning mechanism (8) including: A connecting block (81) is detachably connected to the rotating block (5) and rotates synchronously; A positioning bar (82) is fixedly mounted on the connecting block (81), and the side of the positioning bar (82) facing the copper rod is aligned with the air outlet of the wind knife (7).

5. The copper rod internal defect high-speed flaw detection equipment according to claim 4, characterized in that: A metal sheet (83) is provided on the positioning bar (82), and the side surface of the metal sheet (83) is flush with the side of the positioning bar (82) facing the copper rod.

6. A method for using a high-speed flaw detection device for internal defects of a copper rod, characterized in that: The high-speed flaw detection device for internal defects of a copper rod according to any one of claims 1 to 5 comprises: S10: The driving mechanism (6) drives the plurality of rotating blocks (5) to rotate outward; S20: Pass the copper rod through the cleaning mechanism and the flaw detection mechanism (1), and fix the copper rod with the limiting mechanism (2); S30: The driving mechanism (6) drives the plurality of rotating blocks (5) to rotate outwards, so that the air outlet of the wind knife (7) is aligned with the outer side surface of the copper rod; S40: Air is supplied to the flaw detection mechanism (1) to make the air knife (7) blow air outward, and the motor is started to drive the rotating seat (4) to rotate, so that the air knife (7) rotates along the copper rod in a circular direction to blow away impurities on the copper rod; the copper rod moves forward, so that the flaw detection mechanism (1) continues to perform flaw detection on the copper rod.

Images