Magnetic powder inspection device

Abstract

The utility model provides a magnetic powder inspection device and belongs to the technical field of magnetic powder inspection. The device comprises a circumferential magnetization assembly, the circumferential magnetization assembly comprises a circumferential power supply, a conductor copper bar and a clamping part, the clamping part clamps the two ends of the conductor copper bar, the circumferential power supply is communicated with the conductor copper bar, the conductor copper bar penetrates through an annular workpiece, the circumferential power supply powers on the conductor copper bar, and the clamping part is used for clamping the two ends of the conductor copper bar. The circumferential power supply comprises a positive electrode plate and a negative electrode plate, and the positive electrode plate and the negative electrode plate are driven by the clamping component to abut against the two ends of the conductor copper bar respectively. The two ends of the conductor copper bar are respectively provided with a ferrule, the molar hardness of the ferrule is greater than that of the conductor copper bar, the ferrule is in interference fit with the conductor copper bar, and the outer end face of the ferrule does not protrude out of the end face of the conductor copper bar. The above design solves the problem in the prior art that the service life of the copper rod is short because two ends of the conductor copper rod penetrating through the hollow workpiece are easily upset during circumferential magnetization in magnetic powder inspection.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic particle flaw detection, and particularly relates to a magnetic particle flaw detection device. Background Art

[0002] Magnetic particle flaw detection is a kind of magnetic flaw detection method. It is a non-destructive testing method that detects defects on the surface or near the surface of ferromagnetic materials by the accumulation of magnetic particles in the leakage magnetic field near the defects. A workpiece made of magnetic materials such as steel is magnetized, and the flaw detection method uses the characteristic that the leakage magnetic energy at the defect part can adsorb magnetic particles to display the surface defects and near-surface defects of the detected object according to the distribution of magnetic particles. The characteristics of this flaw detection method are simple and intuitive. Magnetic particle flaw detection is divided into circumferential magnetization, longitudinal magnetization, and multi-directional magnetization.

[0003] Circumferential magnetization in magnetic particle flaw detection means directly energizing the workpiece or passing an electric current through a conductor penetrating the hole of a hollow workpiece, aiming to establish a circumferential closed magnetic field around the workpiece and perpendicular to the workpiece axis in the workpiece, which is used to detect longitudinal defects parallel to the workpiece axis, that is, defects parallel to the current direction. Through the closed magnetic field shape of circumferential magnetization, it ensures that the magnetic force lines surround the workpiece, effectively covering the surface of the workpiece, so as to be able to detect defects parallel to the workpiece axis. This magnetization method is particularly important when detecting internal surface defects of cylindrical specimens. By using the central conductor method, it can ensure uniform current distribution and avoid burns at the electrical contact surface, thus effectively detecting defects.

[0004] In daily production, the conductor penetrating the hole of the hollow workpiece is made of copper. Because the copper rod is relatively soft, after the clamping components on both sides of the magnetic particle flaw detection device apply clamping force to the copper rod multiple times, the two ends of the copper rod are easily upset, resulting in the diameters of the two ends of the copper rod no longer meeting the requirements. At this time, the operator needs to grind the two ends of the copper rod or replace the copper rod to continue production. Summary of the Utility Model

[0005] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a magnetic particle flaw detection device, which is used to solve the problem in the prior art that when magnetic particle flaw detection is circumferentially magnetized, the two ends of the conductor copper rod penetrating the hollow workpiece are easily upset, resulting in a short service life of the copper rod.

[0006] To achieve the above and other related objectives, the present utility model provides a magnetic particle flaw detection device, which includes a circumferential magnetization assembly. The circumferential magnetization assembly includes a circumferential power supply, a conductor copper rod, and a clamping component. The clamping component clamps both ends of the conductor copper rod. The circumferential power supply is connected to the conductor copper rod. The conductor copper rod passes through an annular workpiece. The circumferential power supply includes a positive electrode plate and a negative electrode plate. Driven by the clamping component, the positive electrode plate and the negative electrode plate respectively abut against both ends of the conductor copper rod. Sleeves are installed at both ends of the conductor copper rod. The Mohs hardness of the sleeves is greater than that of the conductor copper rod. The sleeves and the conductor copper rod are in interference fit, and the outer end faces of the sleeves do not protrude from the end faces of the conductor copper rod.

[0007] Optionally, the circumferential power supply further includes a positive electrode shaft and a negative electrode shaft. The positive electrode plate is connected to the clamping component through the positive electrode shaft, and the negative electrode plate is connected to the clamping component through the negative electrode shaft.

[0008] Optionally, it further includes a supporting block, and the conductor copper rod is placed on the supporting block.

[0009] Optionally, the clamping component includes a clamping cylinder, and the clamping cylinder drives the positive electrode plate and the negative electrode plate to move towards each other.

[0010] Optionally, the diameters of the positive electrode plate and the negative electrode plate are both greater than the diameter of the conductor copper rod.

[0011] Optionally, the hardness of the sleeves is greater than or equal to 4 Mohs hardness.

[0012] Optionally, the sleeves are made of metal material.

[0013] Optionally, the sleeves are made of alloy material, and the alloy components include silicon, iron, manganese, and copper.

[0014] Optionally, it further includes a longitudinal magnetization assembly. The longitudinal magnetization assembly includes a longitudinal power supply and a longitudinal magnetization coil. The longitudinal power supply is connected to the longitudinal magnetization coil, and the longitudinal magnetization coil is located at both ends of the annular workpiece.

[0015] As described above, a magnetic particle flaw detection device of the present utility model has at least the following beneficial effects:

[0016] 1. The magnetic particle flaw detection device is designed such that the positive electrode plate and the negative electrode plate respectively press against both ends of the conductor copper rod under the drive of the clamping component. Compared with directly energizing the conductor copper rod through a power source, the two electrode plates respectively pressing against both ends of the conductor copper rod makes the stability of the magnetic particle flaw detection device better during operation. At the same time, by installing ferrules at both ends of the conductor copper rod, the Mohs hardness of the ferrule is greater than that of the conductor copper rod, and the ferrule and the conductor copper rod are in interference fit, and the outer end face of the ferrule does not protrude from the end face of the conductor copper rod. This design reduces the deformation degree of the conductor copper rod. Compared with the prior art where the conductor copper rod is directly clamped at both ends by the clamping component, the two ends of the conductor copper rod with ferrules installed in this device are not easily bulged and deformed, thus improving the service life of the conductor copper rod of this device.

[0017] 2. In this magnetic particle flaw detection device, the positive electrode plate is connected by the positive electrode shaft and the clamping component, and the negative electrode plate is connected by the negative electrode shaft and the clamping component, which improves the stability of the clamping component when clamping the two electrode plates and when clamping the conductor copper rod, that is, improves the reliability of the operation and the detection accuracy of this magnetic particle flaw detection device.

[0018] 3. The magnetic particle flaw detection device is designed by placing the conductor copper rod on the supporting block, which improves the stability of the conductor copper rod. At the same time, when the clamping component does not clamp the conductor copper rod, the copper rod can also be stably placed without falling, thus improving the reliability of this device.

[0019] 4. In this magnetic particle flaw detection device, the diameters of the positive electrode plate and the negative electrode plate are both larger than the diameter of the conductor copper rod, which enhances the stability when the two electrode plates clamp the conductor copper rod. Description of the Drawings

[0020] Figure 1 It shows a schematic diagram of a magnetic particle flaw detection device of the present utility model.

[0021] Figure 2 It shows a schematic diagram of the conductor copper rod of the present utility model.

[0022] Figure 3 It shows a schematic diagram of the comparison of the front and rear ends of the conductor copper rod in the prior art before and after use.

[0023] Description of Element Numbers

[0024] Circumferential power source 11, positive electrode plate 111, negative electrode plate 112, conductor copper rod 12, ferrule 121, clamping cylinder 131, supporting block 14, longitudinal power source 21, longitudinal magnetization coil 22, annular workpiece 3. Detailed Embodiment

[0025] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0026] Please refer to Figures 1 to 3 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present utility model can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that the present utility model can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration, and are not used to limit the scope in which the present utility model can be implemented. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope in which the present utility model can be implemented.

[0027] The following various embodiments are only for illustration. Combinations can be made between the various embodiments, and it is not limited to the content shown in the following single embodiment only.

[0028] Please refer to Figures 1 to 3 , the present utility model provides a magnetic particle flaw detection device. Just like common magnetic particle flaw detection devices, it also includes a circumferential magnetization component. The circumferential magnetization component includes a circumferential power supply 11, a conductor copper rod 12, and a clamping component. The clamping component clamps both ends of the conductor copper rod 12. The circumferential power supply 11 is connected to the conductor copper rod 12. The conductor copper rod 12 passes through the annular workpiece 3. The circumferential power supply 11 energizes the conductor copper rod 12. The difference compared with the prior art is that the circumferential power supply 11 includes a positive electrode plate 111 and a negative electrode plate 112. The positive electrode plate 111 and the negative electrode plate 112 respectively abut against both ends of the conductor copper rod 12 under the drive of the clamping component. Compared with directly energizing the conductor copper rod 12 through a power supply, the two electrode plates respectively abut against both ends of the conductor copper rod 12, making the stability of the magnetic particle flaw detection device during operation better; at the same time, both ends of the conductor copper rod 12 are provided with ferrules 121. The Mohs hardness of the ferrules 121 is greater than the Mohs hardness of the conductor copper rod 12. The ferrules 121 and the conductor copper rod 12 are in interference fit. The outer end face of the ferrules 121 does not protrude from the end face of the conductor copper rod 12. This design reduces the deformation degree of the conductor copper rod 12. Compared with the prior art where the conductor copper rod 12 is directly clamped at both ends by the clamping component, both ends of the conductor copper rod 12 with the ferrules 121 installed in this device are not easily bulged and deformed, thereby improving the service life of the conductor copper rod 12 of this device; thus solving the problem in the prior art that when magnetic particle flaw detection is circumferentially magnetized, both ends of the conductor copper rod 12 passing through the hollow workpiece are easily bulged, resulting in a shorter service life of the copper rod.

[0029] In another embodiment, please refer to Figure 1, the circumferential power supply 11 further includes a positive electrode shaft and a negative electrode shaft; the positive electrode plate 111 is connected to the clamping member through the positive electrode shaft, and the negative electrode plate 112 is connected to the clamping member through the negative electrode shaft, which improves the stability of the clamping member when clamping the two electrode plates and entering the clamped conductor copper bar 12, that is, improves the reliability of the operation of this magnetic particle flaw detection device and the accuracy of detection.

[0030] In another embodiment, please refer to Figure 1 , it further includes a support block 14, and the conductor copper bar 12 is placed on the support block 14. This embodiment improves the stability of the conductor copper bar 12. At the same time, when the clamping member does not clamp the conductor copper bar 12, the copper bar can also be stably placed without falling, thereby improving the reliability of this device.

[0031] In another embodiment, please refer to Figure 1 , the clamping member includes a clamping cylinder 131, and the clamping cylinder 131 drives the positive electrode plate 111 and the negative electrode plate 112 to move towards each other. The cylinder has low cost and reliable movement, and is a more suitable power source for the clamping member.

[0032] In another embodiment, please refer to the figure. The diameters of the positive electrode plate 111 and the negative electrode plate 112 are both larger than the diameter of the conductor copper bar 12, which further enhances the stability when the two electrode plates clamp the conductor copper bar 12.

[0033] In another embodiment, please refer to Figure 2 , the hardness of the ferrule 121 is greater than or equal to 4 Mohs hardness, and the Mohs hardness of the conductor copper bar 12 is between 2.5 - 3. Materials with a Mohs hardness greater than 4 can better resist the clamping force of the two electrode plates and prevent the deformation of the copper bar.

[0034] In another embodiment, please refer to Figure 2 , the ferrule 121 is made of metal material. Using metal material to make the ferrule 121 can better ensure the quality stability of the ferrule 121 compared with using stone materials, etc. The ferrule 121 made of metal material can not only more easily make a ferrule 121 with a Mohs hardness greater than 4, but also the ferrule 121 has better toughness.

[0035] In another embodiment, please refer to Figure 2 , the ferrule 121 is made of alloy material, and the alloy components include silicon, iron, manganese, and copper. The alloy copper of the above materials can ensure the conductivity of the conductor copper bar 12.

[0036] In other embodiments, such as Figure 1As shown, it further includes a longitudinal magnetization component, which includes a longitudinal power supply 21 and a longitudinal magnetization coil 22. The longitudinal power supply 21 is connected to the longitudinal magnetization coil 22. The longitudinal magnetization coil 22 is located at both ends of the annular workpiece 3. Through the design of the longitudinal magnetization component and in cooperation with the circumferential magnetization component, the workpiece can be detected in all directions.

[0037] In summary, in the present utility model, through the design that the positive electrode plate 111 and the negative electrode plate 112 respectively abut against both ends of the conductor copper bar 12 under the drive of the clamping component, compared with directly energizing the conductor copper bar 12 through a power supply, the two electrode plates respectively abut against both ends of the conductor copper bar 12, making the stability of the magnetic particle flaw detection device better during operation; at the same time, by installing ferrules 121 at both ends of the conductor copper bar 12, the Mohs hardness of the ferrules 121 is greater than that of the conductor copper bar 12, the ferrules 121 and the conductor copper bar 12 are in interference fit, and the outer end surface of the ferrules 121 does not protrude from the end surface of the conductor copper bar 12, the degree of deformation of the conductor copper bar 12 is reduced. Compared with the prior art where the conductor copper bar 12 is directly clamped by the clamping component from both ends, the two ends of the conductor copper bar 12 with ferrules 121 installed in this device are not easily bulged and deformed, thereby improving the service life of the conductor copper bar 12 of this device. Therefore, the present utility model effectively overcomes the shortcomings in the prior art and has high industrial utilization value.

[0038] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A magnetic particle flaw detection device, comprising a circumferential magnetization assembly, the circumferential magnetization assembly including a circumferential power supply, a conductor copper bar, and a clamping member, the clamping member clamping both ends of the conductor copper bar, the circumferential power supply being connected to the conductor copper bar, and the conductor copper bar passing through an annular workpiece, characterized in that: The circumferential power supply includes a positive electrode plate and a negative electrode plate, and the positive electrode plate and the negative electrode plate respectively abut against both ends of the conductor copper bar under the drive of the clamping member; Both ends of the conductor copper bar are provided with ferrules, the Mohs hardness of the ferrules is greater than that of the conductor copper bar, the ferrules and the conductor copper bar are in interference fit, and the outer end surface of the ferrules does not protrude from the end surface of the conductor copper bar.

2. The magnetic particle flaw detection device according to claim 1, characterized in that: The circumferential power supply further includes a positive electrode shaft and a negative electrode shaft; The positive electrode plate is connected to the clamping member through the positive electrode shaft, and the negative electrode plate is connected to the clamping member through the negative electrode shaft.

3. A magnetic particle flaw detection device according to claim 1, characterized in that: It further includes a support block, and the conductor copper bar is placed on the support block.

4. A magnetic particle flaw detection device according to claim 1, characterized in that: The clamping member includes a clamping cylinder, and the clamping cylinder drives the positive electrode plate and the negative electrode plate to move towards each other.

5. A magnetic particle flaw detection device according to claim 1, characterized in that: The diameters of the positive electrode plate and the negative electrode plate are both larger than the diameter of the conductor copper bar.

6. The magnetic particle flaw detection device according to claim 1, wherein: The hardness of the ferrule is greater than or equal to 4 Mohs hardness.

7. A magnetic particle flaw detection device according to claim 6, characterized in that: The ferrule is made of metal material.

8. A magnetic particle flaw detection device according to claim 7, characterized in that: The ferrule is made of alloy material, and the alloy components include silicon, iron, manganese, and copper.

9. A magnetic particle flaw detection device according to claim 1, characterized in that: It further includes a longitudinal magnetization assembly, the longitudinal magnetization assembly including a longitudinal power supply and a longitudinal magnetization coil, the longitudinal power supply being connected to the longitudinal magnetization coil, and the longitudinal magnetization coil being located at both ends of the annular workpiece.

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