Eddy current detection device for square billet corner cracks

Abstract

The present invention discloses an eddy current detection device for corner cracks of square billets, comprising a protective cover, the protective cover having a through feed channel, a purge device and a probe floating device are sequentially arranged in the protective cover along the feed direction of the square billet; the probe floating device comprises a first mounting plate, a first driving member driving the first mounting plate to approach / move away from the square billet, a second mounting plate, a second driving member driving the second mounting plate to approach / move away from the square billet, at least one probe mounted on the second mounting plate, and a third driving member driving the probe to approach / move away from the square billet; the first mounting plate moves relative to the protective cover under the drive of the first driving member, and the second mounting plate moves relative to the first mounting plate under the drive of the second driving member. The present invention fully automatically realizes the detection of corner cracks of square billets, and is suitable for square billets with distortion.

Description

Technical Field

[0001] The invention belongs to the technical field of flaw detection, and in particular relates to an eddy current detection device for square billet corner cracks. Background Art

[0002] So far, there is no device for detecting corner cracks in square billets in China. In actual operation, visual inspection is performed manually online. There are too many unstable factors in manual inspection. Different manual inspections are prone to inaccurate inspection judgments, missed inspections, and inconsistent defect inspection standards, which makes the quality standards of each square billet different, thus affecting the processing quality of the next process and causing the defect rate to rise irregularly. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a square billet corner crack eddy current detection device, which can fully automatically detect the square billet corner crack and is suitable for square billets with distortion.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: a square billet corner crack eddy current detection device, comprising a protective cover, the protective cover having a through feeding channel, along the feeding direction of the square billet, the protective cover is sequentially provided with a purging device for cleaning the surface of the square billet and a probe floating device for detecting surface defects of the square billet;

[0005] The probe floating device comprises a first mounting plate, a first driving member driving the first mounting plate to approach / move away from the billet, a second mounting plate, a second driving member driving the second mounting plate to approach / move away from the billet, at least one probe mounted on the second mounting plate, and a third driving member driving the probe to approach / move away from the billet;

[0006] The first mounting plate moves relative to the protective cover when driven by the first driving member, and the second mounting plate moves relative to the first mounting plate when driven by the second driving member.

[0007] The further technical solution adopted by the present invention to solve the technical problem is:

[0008] Furthermore, it also includes a probe distance measuring device, which is connected to the probe, and the third driving member drives the probe distance measuring device and the probe to approach / move away from the square billet at the same time.

[0009] Furthermore, the probe distance measuring device includes a third mounting plate and a third roller for mounting and connecting with the probe, the third roller is located at one end of the third mounting plate close to the square billet, and there is a height difference between the lowermost end of the third roller and the lowermost end of the probe.

[0010] Furthermore, the purging device comprises a mounting frame, a plurality of mounting holes for mounting air nozzles are formed on the mounting frame, the air nozzles are connected to the vacuum pump via pipelines, and a passage is provided inside the mounting frame for the billet to pass through.

[0011] Furthermore, the probe floating device is provided with at least one group, each group of the probe floating devices is provided with two probe floating devices, and the two probe floating devices are symmetrically installed on the protective cover.

[0012] Furthermore, there are three probes, namely a first probe, a second probe and a third probe. The second probe is located between the first probe and the third probe. The installation angle between the first probe and the second probe is 22°, and the installation angle between the second probe and the third probe is 22°. The viewing angle range formed by the first probe, the second probe and the third probe matches the curvature of the square billet.

[0013] Furthermore, a first roller is installed at one end of the first mounting plate close to the billet, and a second roller is installed at one end of the second mounting plate close to the billet, and the first roller and the second roller are vertically distributed.

[0014] Furthermore, a first slide rail is disposed on the inner wall of the protective cover, a second slide rail is disposed on a side of the first mounting plate opposite to the second mounting plate, and the first slide rail and the second slide rail are vertically distributed.

[0015] Furthermore, a first group of photoelectric sensors is disposed at the inlet end of the feed channel, and a second group of photoelectric sensors is disposed at the outlet end of the feed channel.

[0016] Furthermore, the first driving member, the second driving member and the third driving member are all cylinders.

[0017] Beneficial effects of the present invention:

[0018] Since the billet itself has a degree of distortion and cannot pass straight through the feed channel, the probe floating device ensures that the probe can move with the distorted billet and adjusts the probe's posture according to the shape of the billet to ensure that the distorted billet within a certain range can pass normally and be detected.

[0019] The probe floating device is the key to ensure that the probe can move with the movement. The cylinder is installed on the first mounting plate. When the billet is distorted, the probe will twist. After twisting, the force of the probe will be transmitted to the first mounting plate along with the cylinder. The first mounting plate will float with the change of the probe, thereby ensuring that the probe is close to the billet and can be protected from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is one of the structural schematic diagrams of the present invention (including square billets);

[0021] Figure 2 This is the second structural schematic diagram of the present invention;

[0022] Figure 3 It is one of the partial structural schematic diagrams of the present invention;

[0023] Figure 4 This is the second schematic diagram of the local structure of the present invention;

[0024] Figure 5 It is one of the structural schematic diagrams of the probe floating device of the present invention;

[0025] Figure 6 This is the second structural schematic diagram of the probe floating device of the present invention;

[0026] Figure 7 This is the third structural schematic diagram of the probe floating device of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the installation frame of the present invention;

[0028] The parts in the accompanying drawings are marked as follows:

[0029] Protective cover 1, feed channel 2, purge device 3, mounting frame 31, mounting hole 32, probe floating device 4, first mounting plate 41, first driving member 42, second mounting plate 43, second driving member 44, probe 45, third driving member 46, first roller 47, second roller 48, third mounting plate 5, third roller 6, first slide rail 7, second slide rail 8, first group of photoelectric sensors 9, second group of photoelectric sensors 10, square billet 11, height difference H and mounting angle α. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] Embodiment: A square billet corner crack eddy current detection device, such as Figure 1-Figure 8 As shown, it comprises a protective cover 1, the protective cover 1 has a through feeding channel 2, and along the feeding direction of the billet, a blowing device 3 for cleaning the surface of the billet and a probe floating device 4 for detecting surface defects of the billet are sequentially arranged in the protective cover 1;

[0032] The probe floating device 4 includes a first mounting plate 41, a first driving member 42 for driving the first mounting plate 41 to approach or move away from the billet, a second mounting plate 43, a second driving member 44 for driving the second mounting plate 43 to approach or move away from the billet, at least one probe 45 mounted on the second mounting plate 43, and a third driving member 46 for driving the probe 45 to approach or move away from the billet;

[0033] The first mounting plate 41 moves relative to the protective cover 1 under the driving of the first driving member 42 , and the second mounting plate 43 moves relative to the first mounting plate 41 under the driving of the second driving member 44 .

[0034] The first driving member 42 is fixedly connected to the protective cover 1 , and the second driving member 44 is fixedly connected to the first mounting plate 41 .

[0035] It also includes a probe distance measuring device, which is connected to the probe 45. The third driving member 46 drives the probe distance measuring device and the probe 45 to approach / move away from the billet at the same time.

[0036] The probe distance measuring device includes a third mounting plate 5 and a third roller 6 for mounting and connecting with the probe 45. The third roller 6 is located at one end of the third mounting plate 5 close to the square billet. There is a height difference H between the lowermost end of the third roller 6 and the lowermost end of the probe 45, and the vertical distance is 1-1.5 mm.

[0037] The purging device 3 comprises a mounting frame 31 , on which a plurality of mounting holes 32 for mounting air nozzles are provided. The air nozzles are connected to a vacuum pump via pipelines. The interior of the mounting frame 31 has a passage for the billet to pass through.

[0038] The probe floating device 4 is provided with at least one group, each group of the probe floating devices 4 is provided with two probe floating devices 4, and the two probe floating devices 4 are symmetrically installed on the protective cover 1. In this embodiment, the two probe floating devices 4 are installed symmetrically up and down.

[0039] The probes 45 are provided with three, namely, a first probe, a second probe and a third probe. The second probe is located between the first probe and the third probe. The installation angle α between the first probe and the second probe is 22°, and the installation angle α between the second probe and the third probe is 22°. The viewing angle range formed by the first probe, the second probe and the third probe matches the curvature of the square billet.

[0040] A first roller 47 is installed at one end of the first mounting plate 41 close to the billet, and a second roller 48 is installed at one end of the second mounting plate 43 close to the billet. The first roller 47 and the second roller 48 are vertically distributed.

[0041] A first slide rail 7 is disposed on the inner wall of the protection cover 1 , and a second slide rail 8 is disposed on a side of the first mounting plate 41 opposite to the second mounting plate 43 . The first slide rail 7 and the second slide rail 8 are vertically distributed.

[0042] A first group of photoelectric sensors 9 is disposed at the inlet end of the feed channel, and a second group of photoelectric sensors 10 is disposed at the outlet end of the feed channel.

[0043] The first driving member 42 , the second driving member 44 and the third driving member 46 are all cylinders.

[0044] The working principle of the present invention is as follows:

[0045] When working, the upper and lower probe floating devices are automatically lifted before the billet is fed. When one end of the billet enters from the inlet end of the feed channel, the first group of photoelectric sensors has a signal, and the purge device starts to blow high-pressure air to the surface of the billet to remove oil stains and dust on the surface. When the second group of photoelectric sensors senses that one end of the billet has reached the outlet end of the feed channel, the first drive member drives the first mounting plate to move relative to the protective cover so that the first roller approaches the surface of the billet, and then the second drive member drives the second mounting plate to move relative to the first mounting plate so that the second roller approaches the surface of the billet (the arrangement of the first roller and the second roller is At the same time, the third driving member drives the third roller close to the surface of the billet so that the probe can perform flaw detection on the surface of the billet (there is a height difference between the third roller and the probe. When the third roller fits the surface of the billet, it can effectively avoid contact between the probe and the surface of the billet, thereby avoiding damage to the probe). The three probes detect the two sides of the corner and the center of the corner. After detecting a defect signal, the system will have an audible and visual alarm to prompt the operator that there is a defect in the corner. At the same time, the system will also store the defect distribution of the corner crack of the material. After there is no signal from the second photoelectric switch, all cylinders return to their original positions.

[0046] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A billet corner crack eddy current detection device, characterized in that: The protective cover comprises a protective cover (1), wherein the protective cover has a through-going feeding channel (2), and along the feeding direction of the billet, a blowing device (3) for cleaning the surface of the billet and a probe floating device (4) for detecting surface defects of the billet are sequentially arranged in the protective cover; The probe floating device comprises a first mounting plate (41), a first driving member (42) for driving the first mounting plate to approach or move away from the billet, a second mounting plate (43), a second driving member (44) for driving the second mounting plate to approach or move away from the billet, at least one probe (45) mounted on the second mounting plate, and a third driving member (46) for driving the probe to approach or move away from the billet; The probes are provided with three, namely, a first probe, a second probe and a third probe, the second probe is located between the first probe and the third probe, the installation angle between the first probe and the second probe is 22°, the installation angle between the second probe and the third probe is 22°, and the viewing angle range formed by the first probe, the second probe and the third probe matches the curvature of the billet; The probe floating device is provided with at least one group, each group of the probe floating devices is provided with two probe floating devices, and the two probe floating devices are symmetrically installed on the protective cover; The first mounting plate moves relative to the protective cover under the driving of the first driving member, and the second mounting plate moves relative to the first mounting plate under the driving of the second driving member; A first roller (47) is installed on one end of the first mounting plate close to the square billet, and a second roller (48) is installed on one end of the second mounting plate close to the square billet, wherein the first roller and the second roller are vertically distributed; The square billet corner crack eddy current detection device further comprises a probe distance measuring device, the probe distance measuring device is connected to the probe, and the third driving member drives the probe distance measuring device and the probe to approach / move away from the square billet at the same time; The probe distance measuring device comprises a third mounting plate (5) and a third roller (6) for mounting and connecting with the probe, the third roller being located at one end of the third mounting plate close to the square billet, and a height difference being formed between the lowermost end of the third roller and the lowermost end of the probe; A first slide rail (7) is provided on the inner wall of the protective cover, and a second slide rail (8) is provided on a side of the first mounting plate opposite to the second mounting plate, wherein the first slide rail and the second slide rail are vertically distributed.

2. The eddy current detection device for square billet corner cracks according to claim 1, characterized in that: The purging device comprises a mounting frame (31) on which a plurality of mounting holes (32) for mounting air nozzles are formed. The air nozzles are connected to a vacuum pump via a pipeline. The interior of the mounting frame has a passage for the billet to pass through.

3. The eddy current detection device for square billet corner cracks according to claim 1, characterized in that: A first group of photoelectric sensors (9) is provided at the inlet end of the feed channel, and a second group of photoelectric sensors (10) is provided at the outlet end of the feed channel.

4. The eddy current detection device for square billet corner cracks according to claim 1, characterized in that: The first driving member, the second driving member and the third driving member are all cylinders.

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