Metal plate early crack nondestructive testing instrument based on magnetic memory effect

Abstract

The invention discloses a nondestructive testing instrument for early cracks of a metal plate based on a magnetic memory effect, and belongs to the technical field of metal plate detection, the nondestructive testing instrument comprises a workbench, and one side of the top of the workbench is fixedly connected with a first linear module. According to the feeding frame, a hydraulic cylinder drives a connecting plate to move downwards through a second linear module, a transverse plate drives a gear, a rotating shaft and a worm to rotate through a rack, a worm gear drives two first lead screw bases, a screw rod and a fixing block to synchronously and relatively move through positive and negative lead screws, and the rotating shaft continues to rotate; the positive and negative lead screws continuously drive the first lead screw seat, the screw rod and the fixing block to move towards the metal plate so as to automatically fix the metal plate, and the vertical movement of the elastic magnetic memory detection unit is automatically converted into the fixing force of the metal plate, so that the portability of the device in the use process is greatly realized; the operation convenience and functionality of the equipment are remarkably improved, and the application range and practicability of the equipment are effectively expanded.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of metal plate detection, and particularly relates to a metal plate early crack nondestructive detection instrument based on a magnetic memory effect. BACKGROUND

[0002] The metal magnetic memory detection technology is a rapid nondestructive detection method for detecting stress concentration positions of components by using the metal magnetic memory effect, overcomes the shortcomings of traditional nondestructive detection, and can diagnose stress concentration zones, i.e. micro defects and early failure and damage, in ferromagnetic metal components, to prevent sudden fatigue damage.

[0003] For example, a remanufactured part ferromagnetic coating bonding strength detector is disclosed in Chinese patent document (CN103760102A), which comprises a load driving mechanism, a control device, a detection device and a supporting mechanism. The load driving mechanism comprises a servo motor as a power device, a transmission mechanism and a pressure head assembly connected with the transmission mechanism. The servo motor is installed on one end surface of the driving mechanism shell. The transmission mechanism comprises a screw rod connected with the servo motor, a nut movable sleeve, a compression spring, a pressure ring gasket and a force sensor arranged in sequence on one side of the nut movable sleeve. The force sensor is adjacent to a pressure head seat on one side. The pressure head seat is embedded with the pressure head assembly, and the tip of the pressure head assembly is embedded with a pressure head. The nut movable sleeve and the pressure ring gasket are installed in the driving mechanism shell in a circumferential fixed and axial sliding manner. The detection device comprises the force sensor, a magnetic memory probe on the object platform and a magnetic memory signal acquisition device. The control device controls the operation of the servo motor. However, the device needs to detect the workpiece one by one during use, has low automation degree, and thus affects the overall detection efficiency of the device. Therefore, improvement is needed. SUMMARY

[0004] The purpose of the present application is to solve the problem that the prior art needs to detect the workpiece one by one during use, has low automation degree, and thus affects the overall detection efficiency of the device, and to provide a metal plate early crack nondestructive detection instrument based on a magnetic memory effect.

[0005] To achieve the above purpose, the present application adopts the following technical scheme:

[0006] A metal plate early crack nondestructive detection instrument based on a magnetic memory effect comprises a workbench, a first linear module is fixedly connected to one side of the top of the workbench, and further comprises:

[0007] A fixed block is installed on the top of the first linear module, and the cross-sectional shape of the fixed block is L-shaped. A cavity is formed in one side of the fixed block.

[0008] A hydraulic cylinder is installed on one side of the top of the fixed block, and the output shaft of the hydraulic cylinder extends to below the fixed block and is provided with a second linear module.

[0009] An elastic magnetic memory detection unit is installed at the bottom of the second linear module.

[0010] A fixing assembly is installed inside the workbench and is used to convert the vertical movement of the second linear module into automatic fixing force on the external metal plate.

[0011] An automatic feeding and discharging assembly is installed inside the workbench and is used to convert the vertical movement of the second linear module into feeding and discharging force on the metal plate.

[0012] Further description of the above technical solutions:

[0013] The fixing assembly comprises:

[0014] A connecting plate is fixedly connected to one side of the top of the second linear module, and the connecting plate is slidingly connected in a cavity formed in the fixed block. The connecting plate has an L-shaped cross section, and the bottom of the connecting plate extends into the workbench.

[0015] A cross plate is arranged at the bottom of the connecting plate and is slidingly connected in the workbench.

[0016] Two first springs are symmetrically arranged at the bottom of the cross plate, and the bottom of the first spring is fixedly connected to the inner wall of the workbench.

[0017] Further description of the above technical solutions:

[0018] The fixing assembly further comprises:

[0019] A rack is fixedly connected to one side of the bottom of the cross plate.

[0020] A gear is meshingly connected to one side of the bottom of the rack.

[0021] A rotating shaft is fixedly connected to the inner circumferential side of the gear, and both ends of the rotating shaft are rotatably connected to the workbench.

[0022] Further description of the above technical solutions:

[0023] The fixing assembly further comprises:

[0024] A worm is fixed to the outer circumferential side of the rotating shaft.

[0025] A worm wheel is meshingly connected to the top of the worm.

[0026] A connecting shaft is fixedly connected to the inner circumferential side of the worm wheel, and the connecting shaft is rotatably connected to the workbench.

[0027] The positive and negative screw is fixedly connected at one end of the connecting shaft, and the positive and negative screw is rotatably connected at the other end of the connecting shaft inside the workbench.

[0028] The two first screw rod seats are drivingly connected at two sides of the positive and negative screw, and the top of the first screw rod seat extends to the outside of the workbench, and the first screw rod seat is slidingly connected inside the workbench.

[0029] As a further description of the above technical solution:

[0030] The fixing assembly further comprises:

[0031] The two screw rods are respectively threadedly connected at the top center of the two first screw rod seats;

[0032] The two fixed blocks are arranged between the two first screw rod seats, and one end of the fixed block is rotatably connected inside the screw rod through the bearing seat, the first screw rod seat is provided with two circular through holes with the screw rod as the center, and the other end of the screw rod extends to the outside of the first screw rod seat and is fixedly connected with the handle.

[0033] The limiting rod is slidingly connected inside the circular through hole, and one end of the limiting rod is fixedly connected with the outer wall of the fixed block.

[0034] As a further description of the above technical solution:

[0035] The automatic feeding and discharging assembly comprises:

[0036] The driving wheel is fixed to the outer circumferential side of the rotating shaft;

[0037] The driven wheel is drivingly connected at one side of the top of the driving wheel through the transmission belt, and the driven wheel is arranged inside the top side of the workbench;

[0038] The fixed shaft is fixedly connected inside the driven wheel, and the fixed shaft is rotatably connected inside the workbench;

[0039] The reciprocating screw rod is fixedly connected at one end of the fixed shaft, the other end of the reciprocating screw rod is rotatably connected inside the workbench, and the pitch of the reciprocating screw rod is greater than the pitch of the positive and negative screw rod;

[0040] The second screw rod seat is drivingly connected at the outer circumferential side of the reciprocating screw rod, and the top of the second screw rod seat extends to the outside of the workbench, and the second screw rod seat is slidingly connected inside the workbench.

[0041] The feeding frame is fixedly connected at one side of the top of the second screw rod seat, and the feeding frame is arranged above the workbench.

[0042] As a further description of the above technical solution:

[0043] The automatic feeding and discharging assembly further comprises:

[0044] A plurality of fourth springs, one end of each of which is fixed to one side of the bottom of the feeding frame;

[0045] A sliding plate, one side of which is fixedly connected to the other side of the fourth spring, the sliding plate being slidingly connected inside the feeding frame;

[0046] Two first toothed plates, symmetrically fixed to the bottom of the sliding plate on both sides, and the first toothed plate being slidingly connected inside the feeding frame;

[0047] Two limiting blocks, respectively arranged on the side away from the first toothed plate, and the limiting block being fixed to the top of the workbench through the support seat.

[0048] Further description of the above technical solution:

[0049] The automatic feeding and discharging assembly further comprises:

[0050] A plurality of first telescopic sleeves, arranged between the plurality of fourth springs, and the first telescopic sleeve being arranged on the side opposite to the fourth spring;

[0051] Two groups of first rollers, respectively arranged between the two first toothed plates, each group of first rollers being composed of a plurality of first rollers;

[0052] Two groups of support plates, symmetrically arranged with the feeding frame as the center, each group of support plates being composed of a plurality of support plates, and the support plate being fixedly connected to the outer wall of the first roller on one side;

[0053] Two groups of second springs, symmetrically arranged with the feeding frame as the center, each group of second springs being composed of a plurality of second springs, the plurality of second springs being symmetrically arranged with the support plate as the center, and the second spring being fixedly connected to the first roller on one side and the inner wall of the feeding frame on the other side.

[0054] Further description of the above technical solution:

[0055] The automatic feeding and discharging assembly further comprises:

[0056] A flat plate, fixed to the side of the first toothed plate away from the sliding plate;

[0057] A first tapered block, fixed to the other side of the top of the flat plate;

[0058] A second tapered block, the inclined surface of which is fitted on the inclined surface of the first tapered block;

[0059] A connecting rod, fixedly connected to one side of the second tapered block, and the connecting rod being slidingly connected inside the feeding frame, the other end of the connecting rod being fixedly connected with the second toothed plate;

[0060] A plurality of second rollers, each being arranged on one side of the second toothed plate, and the second roller being arranged on the side opposite to the first telescopic sleeve, and the first telescopic sleeve and the second roller being on the same axis;

[0061] A second telescopic sleeve is fixedly connected to the side of the connecting rod away from the second tooth plate, and the second telescopic sleeve and the first telescopic sleeve are both slidingly connected inside the feeding frame.

[0062] A plurality of third springs are arranged on the side of the second roller, and each group of third springs is composed of two third springs, and the two third springs are symmetrically arranged with the second telescopic sleeve as the center.

[0063] Further description of the above technical solution:

[0064] Further comprising:

[0065] An air bag is arranged between the two first springs, and the air bag is fixedly connected to the bottom of the horizontal plate and the inner wall of the workbench on both sides.

[0066] A one-way air outlet pipe is in communication with the air bag at one end, and the other end of the one-way air outlet pipe is in communication with an inner cavity arranged inside the fixed block.

[0067] A plurality of air outlets are arranged on the side opposite to the center of the workbench inside the fixed block, and the other side of the air outlet is in communication with the inner cavity.

[0068] A one-way air inlet pipe is in communication with the air bag at one end.

[0069] As described above, due to the adoption of the above technical solution, the beneficial effects of the present application are:

[0070] 1、In the present application, the fixed assembly is arranged, the connecting plate is driven to move downward by the second linear module, the horizontal plate is driven to rotate by the rack, the gear, the shaft and the worm, the worm gear is driven to synchronously move the two first screw rod seats, the screw rod and the fixed block by the reversible screw rod, with the downward movement of the connecting plate, the shaft continues to rotate, and in the resetting process of the feeding frame, the reversible screw rod continuously drives the first screw rod seat, the screw rod and the fixed block to move to the direction of the metal plate, so as to automatically fix the metal plate, automatically convert the vertical movement of the elastic magnetic memory detection unit into the fixing force of the metal plate, greatly realize the portability of the device in use, significantly improve the operation convenience and functionality of the equipment, effectively expand the application range and practicality, and manually operate the handle to drive the screw rod to rotate, so as to adjust the use position of the two fixed blocks, so as to meet the fixing requirements of metal plates of different sizes.

[0071] 2. In this invention, through the automatic feeding and discharging assembly, the rotating shaft initially drives the driven wheel, fixed shaft, and reciprocating screw to rotate via the driving wheel and transmission belt, causing the second screw seat to move the feeding frame towards the limiting block. At this time, the limiting block will squeeze the first toothed plate and the fourth spring. During the movement, the first toothed plate will squeeze the first roller and the second spring. Simultaneously, the first toothed plate will drive the second cone block, connecting rod, and second toothed plate to move via the flat plate and the first cone block, causing the second roller to drive the second telescopic sleeve to move, which, in conjunction with the sliding plate, drives the first... The telescopic sleeves move synchronously, firstly clamping and fixing the second metal plate below the feeding frame with the first and second telescopic sleeves simultaneously. When the feeding frame contacts the surface of the support base, the second spring drives the first roller and the support plate to move into the feeding frame, reducing the support plate's support on the bottom metal plate. At this time, the bottom metal plate will detach from the feeding frame under the action of gravity and fall to the top of the worktable. The vertical movement of the elastic magnetic memory detection unit is automatically converted into the feeding and discharging force of the metal plate, greatly improving the portability of the device during use.

[0072] 3. In this invention, the airbag is designed so that the horizontal plate will transport the gas inside the airbag to the inner cavity inside the fixed block through the one-way air outlet, and then spray it onto the surface of the metal plate through the air outlet to help blow away the debris or dust remaining on the surface of the bottom metal plate, thereby ensuring the detection accuracy of the device. Attached Figure Description

[0073] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0074] Figure 2 In this invention Figure 1 A magnified schematic diagram of the structure at point A;

[0075] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the workbench in this invention;

[0076] Figure 4 This is a three-dimensional structural diagram of the fixed component and the automatic feeding and discharging component from another perspective in this invention.

[0077] Figure 5 This is a partial three-dimensional structural diagram of the fixing component in this invention;

[0078] Figure 6 In this invention Figure 5 A magnified schematic diagram of the structure at point B;

[0079] Figure 7 This is a three-dimensional structural diagram of the automatic feeding and discharging part of the present invention.

[0080] Explanation of reference numerals in the attached figures:

[0081] 1. Workbench; 2. First linear module; 3. Fixing block; 4. Hydraulic cylinder; 5. Second linear module; 6. Fixing assembly; 601. Connecting plate; 602. Horizontal plate; 603. First spring; 604. Rack; 605. Gear; 606. Rotating shaft; 607. Worm gear; 608. Connecting shaft; 609. Worm wheel; 610. Positive and negative lead screws; 611. First lead screw seat; 612. Screw; 613. Fixing block; 7. Automatic feeding and discharging assembly; 701. Drive wheel; 702. Driven wheel; 7 03. Fixed shaft; 704. Reciprocating lead screw; 705. Second lead screw seat; 706. Feeding frame; 707. Sliding plate; 708. First toothed plate; 709. Limiting block; 710. First telescopic sleeve; 711. First roller; 712. Support plate; 713. Second spring; 714. Flat plate; 715. First cone block; 716. Second cone block; 717. Connecting rod; 718. Second toothed plate; 719. Second roller; 720. Second telescopic sleeve; 721. Third spring; 8. Airbag. Detailed Implementation

[0082] 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.

[0083] Please see Figures 1-7 This invention provides a technical solution: a non-destructive testing instrument for early cracks in metal plates based on magnetic memory effect, comprising a worktable 1, a first linear module 2 fixedly connected to one side of the top of the worktable 1, and further comprising:

[0084] The fixing block 3 is installed on the top of the first linear module 2, and the cross-sectional shape of the fixing block 3 is set to L-shaped, with a cavity opened on one side inside the fixing block 3;

[0085] Hydraulic cylinder 4 is installed on one side of the top of fixed block 3, and one end of the output shaft of hydraulic cylinder 4 extends to the bottom of fixed block 3 and is provided with a second linear module 5;

[0086] An elastic magnetic memory detection unit is installed at the bottom of the second linear module 5;

[0087] The fixing component 6 is installed inside the workbench 1 and is used to convert the vertical movement of the second linear module 5 into an automatic fixing force on the external metal plate.

[0088] Automatic feeding and discharging assembly 7 is installed inside the workbench 1 and is used to convert the vertical movement of the second linear module 5 into the feeding and discharging force of the metal plate.

[0089] Fixing component 6 includes:

[0090] The connecting plate 601 is fixedly connected to the second linear module 5 on one side of its top, and the connecting plate 601 is slidably connected to the cavity opened inside the fixing block 3. The cross-sectional shape of the connecting plate 601 is set to L-shaped, and the bottom of the connecting plate 601 extends into the interior of the worktable 1.

[0091] A horizontal plate 602 is provided at the bottom of the connecting plate 601, and the horizontal plate 602 is slidably connected inside the worktable 1;

[0092] Two first springs 603 are symmetrically distributed on both sides of the bottom of the horizontal plate 602, and the bottom of the first springs 603 are fixedly connected to the inner wall of the worktable 1.

[0093] The top side of the rack 604 is fixedly connected to the bottom side of the cross plate 602;

[0094] Gear 605 is meshed with one side of the bottom of rack 604;

[0095] The rotating shaft 606 is fixedly connected to the inner circumference of the gear 605, and both ends of the rotating shaft 606 are rotatably connected to the inside of the worktable 1;

[0096] The worm gear 607 is fixed to the outer circumference of the rotating shaft 606;

[0097] Worm gear 609 is meshed with the top of worm 607;

[0098] The connecting shaft 608 is fixedly connected to the inner circumference of the worm gear 609, and the connecting shaft 608 is rotatably connected inside the worktable 1;

[0099] The positive and negative lead screws 610 are fixedly connected to one end of the connecting shaft 608, and the end of the positive and negative lead screws 610 away from the connecting shaft 608 is rotatably connected inside the worktable 1.

[0100] Two first lead screw seats 611 are connected to the two sides of the positive and negative lead screws 610, and the top of the first lead screw seat 611 extends to the outside of the worktable 1, and the first lead screw seat 611 is slidably connected to the inside of the worktable 1.

[0101] Two screws 612 are threadedly connected to the center of the top of the two first lead screw seats 611 respectively;

[0102] Two fixing blocks 613 are both set between two first lead screw seats 611, and one end of the fixing block 613 is rotatably connected to the inside of the screw 612 through the bearing seat. The first lead screw seat 611 has two circular through holes with the screw 612 as the center. The end of the screw 612 away from the fixing block 613 extends to the outside of the first lead screw seat 611 and is fixedly connected to the handle.

[0103] The limiting rod is slidably connected inside the circular through hole, and one end of the limiting rod is fixedly connected to the outer wall of the fixing block 613.

[0104] Detailed Implementation: First, the external metal plate to be tested is placed inside the loading frame 706. The hydraulic cylinder 4, through the second linear module 5, drives the connecting plate 601 downwards. During this downward movement, the connecting plate 601 compresses the horizontal plate 602 and the first spring 603, causing the horizontal plate 602 to drive the rack 604 downwards. Utilizing the linkage effect between the rack 604 and the gear 605, power is transmitted to the gear 605, causing the gear 605 to drive the rotating shaft 606 and the worm gear 607 to rotate. Then, utilizing the linkage effect between the worm 607 and the worm wheel 609, power is transmitted to the worm wheel 609, causing the worm wheel 609 to drive the positive and negative lead screws 610 to rotate. This causes the two first lead screw seats 611, the screw 612, and the fixed block 613 to move synchronously relative to each other. As the connecting plate 601 moves downward, the rotating shaft 606 continues to rotate, causing the reciprocating lead screw 704 to drive the second lead screw seat 705 and the feeding frame 706 to reset. At this time, the positive and negative lead screws 610 will continue to drive the first lead screw seats 611. The screw 612 and the fixing block 613 move towards the metal plate to automatically fix the metal plate. The vertical movement of the elastic magnetic memory detection unit is automatically converted into the fixing force of the metal plate, which greatly improves the portability of the device during use, significantly enhances the ease of operation and functionality of the equipment, and effectively expands its application range and practicality. The operator can manually operate the handle to drive the screw 612 to rotate, so as to adjust the position of the two fixing blocks 613 to meet the fixing needs of metal plates of different sizes. After the fixing is completed, the first linear module 2 will drive the fixing block 3 and the elastic magnetic memory detection unit to move horizontally, while the second linear module 5 will drive the elastic magnetic memory detection unit to move vertically, so that the elastic magnetic memory detection unit can perform comprehensive detection of the metal plate. Ball bearings can be set at the bottom of the connecting plate 601 to reduce the friction between the connecting plate 601 and the horizontal plate 602, and the materials of the fixing block 613 and the first lead screw seat 611 can be selected according to actual needs.

[0105] The automatic feeding and discharging assembly 7 includes:

[0106] The drive wheel 701 is fixed to the outer circumference of the rotating shaft 606;

[0107] Driven wheel 702 is connected to the top side of driving wheel 701 via a transmission belt, and driven wheel 702 is located on the top side inside the worktable 1;

[0108] The fixed shaft 703 is fixedly connected inside the driven wheel 702, and the fixed shaft 703 is rotatably connected inside the worktable 1;

[0109] The reciprocating screw 704 is fixedly connected to one end of the fixed shaft 703, and the other end of the reciprocating screw 704 is rotatably connected to the inside of the worktable 1. The pitch of the reciprocating screw 704 is greater than the pitch of the forward and reverse screws 610.

[0110] The second lead screw seat 705 is connected to the outer periphery of the reciprocating lead screw 704, and the top of the second lead screw seat 705 extends to the outside of the worktable 1. The second lead screw seat 705 is slidably connected inside the worktable 1.

[0111] The feeding frame 706 is fixedly connected to one side of the top of the second lead screw seat 705, and the feeding frame 706 is set above the worktable 1;

[0112] Multiple fourth springs, one end of which is fixed to one side of the bottom of the feeding frame 706;

[0113] The sliding plate 707 is fixedly connected to the fourth spring on one side and slidably connected inside the feeding frame 706.

[0114] Two first toothed plates 708 are symmetrically fixed on both sides of the bottom of the sliding plate 707, and the first toothed plates 708 are slidably connected inside the feeding frame 706.

[0115] Two limiting blocks 709 are respectively set on the side away from the first toothed plate 708, and the limiting blocks 709 are fixed to the top of the worktable 1 by the support base;

[0116] Multiple first telescopic sleeves 710 are disposed between multiple fourth springs, and the first telescopic sleeves 710 are disposed on the side opposite to the fourth spring;

[0117] Two sets of first rollers 711 are respectively disposed between two first toothed plates 708, and each set of first rollers 711 is composed of multiple first rollers 711;

[0118] Two sets of support plates 712 are symmetrically arranged with the feed frame 706 as the center. Each set of support plates 712 consists of multiple support plates 712, and one side of the support plate 712 is fixedly connected to the outer wall of the first roller 711.

[0119] Two sets of second springs 713 are symmetrically arranged with the feeding frame 706 as the center. Each set of second springs 713 consists of multiple second springs 713. The multiple second springs 713 are symmetrically arranged with the support plate 712 as the center. The two sides of the second springs 713 are respectively fixedly connected to one side of the first roller 711 and the inner wall of the feeding frame 706.

[0120] Flat plate 714, fixed to the side of the first toothed plate 708 away from the sliding plate 707;

[0121] The first cone block 715 is fixed to the other side of the top of the plate 714;

[0122] The second cone block 716 has its inclined surface attached to the inclined surface of the first cone block 715;

[0123] The connecting rod 717 is fixedly connected to one side of the second cone block 716, and the connecting rod 717 is slidably connected inside the feeding frame 706. The other end of the connecting rod 717 is fixedly connected to the second toothed plate 718.

[0124] Multiple second rollers 719 are all disposed on one side of the second toothed plate 718, and the second rollers 719 are disposed on the side opposite to the first telescopic sleeve 710, and the first telescopic sleeve 710 and the second rollers 719 are on the same axis.

[0125] The second telescopic sleeve 720 is fixedly connected to the side of the connecting rod 717 away from the second toothed plate 718. Both the second telescopic sleeve 720 and the first telescopic sleeve 710 are slidably connected inside the feeding frame 706.

[0126] Multiple sets of third springs 721 are respectively set on one side of the second roller 719. Each set of third springs 721 consists of two third springs 721, and the two third springs 721 are symmetrically arranged with the second telescopic sleeve 720 as the center.

[0127] Detailed Implementation: During rotation, the rotating shaft 606 drives the driving wheel 701 to rotate. Utilizing the linkage effect between the driving wheel 701, the transmission belt, and the driven wheel 702, power is transmitted to the driven wheel 702, causing it to drive the fixed shaft 703 and the reciprocating screw 704 to rotate. Then, utilizing the linkage effect between the reciprocating screw 704 and the second screw seat 705, power is transmitted to the second screw seat 705, causing it to drive the feeding frame 706 to move towards the limiting block 709. As the feeding frame 706 moves continuously, the limiting block 709 compresses the first toothed plate 708 and the fourth spring. During its movement, the first toothed plate 708 compresses the first roller 711 and the second spring 713. Simultaneously, the first toothed plate 708 drives the flat plate 714 and the first cone block 715 to move, causing the second cone block 716 to drive the connecting rod 717 and the second toothed plate 718 to move. During its movement, plate 718 compresses the second roller 719 and the third spring 721, which, together with the sliding plate 707, drives the first telescopic sleeve 710 to move synchronously. First, the first telescopic sleeve 710 and the second telescopic sleeve 720 simultaneously clamp and fix the second metal plate below the feeding frame 706. Then, the feeding frame 706 continues to move. When the feeding frame 706 contacts the surface of the support base, the second spring 713 drives the first roller 711 and the support plate 712 to move into the feeding frame 706, reducing the support of the support plate 712 on the bottom metal plate. At this time, the bottom metal plate will detach from the feeding frame 706 under the action of gravity and fall to the top of the workbench 1. The vertical movement of the elastic magnetic memory detection unit is automatically converted into the feeding and discharging force of the metal plate, greatly realizing the portability of the device during use. The first telescopic sleeve 710 and the second telescopic sleeve 720 are both composed of an outer sleeve, a fifth spring, and an inner guide block.

[0128] Airbag 8 is positioned between two first springs 603, and both sides of airbag 8 are fixedly connected to the bottom of the horizontal plate 602 and the inner wall of the worktable 1, respectively.

[0129] One-way air outlet pipe, one end of which is connected to airbag 8, and the other end of the one-way air outlet pipe is connected to an inner cavity, which is located inside the fixing block 613.

[0130] Multiple air outlets are located inside the fixed block 613 on one side relative to the center of the worktable 1, and the other side of the air outlets is connected to the inner cavity;

[0131] A one-way air intake pipe, one end of which is connected to the airbag 8.

[0132] Detailed implementation: The horizontal plate 602 will squeeze the airbag 8, and the gas inside the airbag 8 will be transported to the inner cavity inside the fixed block 613 through the one-way air outlet, and then sprayed onto the surface of the metal plate through the air outlet to assist in cleaning the surface of the bottom metal plate.

[0133] Working principle: In use, the external metal plate to be detected is first placed inside the loading frame 706, so that the hydraulic cylinder 4 drives the connecting plate 601 to move downward through the second linear module 5. During the downward movement of the connecting plate 601, it will squeeze the horizontal plate 602 and the first spring 603, so that the horizontal plate 602 drives the rack 604 to move downward. Utilizing the linkage effect between the rack 604 and the gear 605, the power is transmitted to the gear 605, so that the gear 605 drives the rotating shaft 606 and the worm 607 to rotate. Then, utilizing the linkage effect between the worm 607 and the worm wheel 609, the power is transmitted to the worm wheel 609, so that the worm wheel 609 drives the positive and negative lead screws 610 to rotate, so that the two first lead screw seats 611, the screw 612 and the fixed block 613 move synchronously relative to each other.

[0134] During rotation, the rotating shaft 606 drives the driving wheel 701 to rotate. Utilizing the linkage effect between the driving wheel 701, the transmission belt, and the driven wheel 702, power is transmitted to the driven wheel 702, causing it to drive the fixed shaft 703 and the reciprocating screw 704 to rotate. Then, utilizing the linkage effect between the reciprocating screw 704 and the second screw seat 705, power is transmitted to the second screw seat 705, causing it to move the feeding frame 706 towards the limiting block 709. As the feeding frame 706 moves, the limiting block 709 compresses the first toothed plate 708 and the fourth spring. During its movement, the first toothed plate 708 compresses the first roller 711 and the second spring 713. Simultaneously, the first toothed plate 708 drives the flat plate 714 and the first cone block 715 to move. The second cone block 716 drives the connecting rod 717 and the second toothed plate 718 to move. During the movement, the second toothed plate 718 will squeeze the second roller 719 and the third spring 721. In conjunction with the sliding plate 707, the first telescopic sleeve 710 moves synchronously. First, the first telescopic sleeve 710 and the second telescopic sleeve 720 clamp and fix the second metal plate below the loading frame 706. Then, the loading frame 706 continues to move. When the loading frame 706 contacts the surface of the support base, the second spring 713 will drive the first roller 711 and the support plate 712 to move into the loading frame 706. This will reduce the support of the support plate 712 on the bottom metal plate. At this time, the bottom metal plate will detach from the loading frame 706 under the action of gravity and fall to the top of the workbench 1, realizing the automatic loading of metal plates.

[0135] As the connecting plate 601 moves downward, the rotating shaft 606 continues to rotate, causing the reciprocating screw 704 to drive the second screw seat 705 and the feeding frame 706 to reset. At this time, the forward and reverse screws 610 will continuously drive the first screw seat 611, the screw 612 and the fixing block 613 to move towards the metal plate to automatically fix the metal plate. During this process, the horizontal plate 602 will squeeze the airbag 8, and the gas inside the airbag 8 will be transported to the inner cavity of the fixing block 613 through the one-way air outlet, and then sprayed onto the surface of the metal plate through the air outlet. The operator can manually operate the handle to drive the screw 612 to rotate, so as to adjust the position of the two fixing blocks 613. After the fixing is completed, the first linear module 2 will drive the fixing block 3 and the elastic magnetic memory detection unit to move horizontally, while the second linear module 5 will drive the elastic magnetic memory detection unit to move vertically, so that the elastic magnetic memory detection unit can perform a comprehensive inspection of the metal plate.

[0136] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A non-destructive testing instrument for early cracks in metal plates based on magnetic memory effect, comprising a worktable (1), characterized in that, The workbench (1) is fixedly connected to one side of its top with a first linear module (2), and also includes: A fixing block (3) is installed on the top of the first linear module (2), and the cross-sectional shape of the fixing block (3) is set to L-shape. A cavity is opened on one side of the fixing block (3). A hydraulic cylinder (4) is installed on one side of the top of the fixed block (3), and one end of the output shaft of the hydraulic cylinder (4) extends to the bottom of the fixed block (3) and is provided with a second linear module (5). An elastic magnetic memory detection unit is installed at the bottom of the second linear module (5); The fixing component (6) is installed inside the workbench (1) to convert the vertical movement of the second linear module (5) into an automatic fixing force on the external metal plate; Automatic feeding and discharging assembly (7) is installed inside the workbench (1) to convert the vertical movement of the second linear module (5) into the feeding and discharging force of the metal plate.

2. The non-destructive testing instrument for early cracks in metal plates based on magnetic memory effect according to claim 1, characterized in that, The fixing component (6) includes: The connecting plate (601) is fixedly connected to the second linear module (5) on one side of the top, and the connecting plate (601) is slidably connected to the cavity opened inside the fixed block (3). The cross-sectional shape of the connecting plate (601) is set to L-shape, and the bottom of the connecting plate (601) extends into the workbench (1). A horizontal plate (602) is set at the bottom of the connecting plate (601), and the horizontal plate (602) is slidably connected inside the worktable (1); Two first springs (603) are symmetrically distributed on both sides of the bottom of the horizontal plate (602), and the bottom of the first springs (603) is fixedly connected to the inner wall of the worktable (1).

3. The non-destructive testing instrument for early cracks in metal plates based on magnetic memory effect according to claim 2, characterized in that, The fixing component (6) also includes: The rack (604) is fixedly connected to the bottom side of the cross plate (602) on one side at the top. The gear (605) is meshed with the bottom side of the rack (604); The rotating shaft (606) is fixedly connected to the inner circumference of the gear (605), and both ends of the rotating shaft (606) are rotatably connected to the inside of the worktable (1).

4. The non-destructive testing instrument for early cracks in metal plates based on magnetic memory effect according to claim 3, characterized in that, The fixing component (6) also includes: The worm (607) is fixed to the outer circumference of the rotating shaft (606); The worm gear (609) is meshed with the top of the worm (607); The connecting shaft (608) is fixedly connected to the inner circumference of the worm gear (609), and the connecting shaft (608) is rotatably connected to the inside of the worktable (1); The positive and negative lead screws (610) are fixedly connected to one end of the connecting shaft (608), and the end of the positive and negative lead screws (610) away from the connecting shaft (608) is rotatably connected to the inside of the worktable (1); Two first lead screw seats (611) are connected to the positive and negative lead screws (610) on both sides, and the top of the first lead screw seat (611) extends to the outside of the worktable (1). The first lead screw seat (611) is slidably connected inside the worktable (1).

5. The non-destructive testing instrument for early cracks in metal plates based on magnetic memory effect according to claim 4, characterized in that, The fixing component (6) also includes: Two screws (612) are threadedly connected to the center of the top of the two first lead screw seats (611); Two fixing blocks (613) are both set between two first lead screw seats (611), and one end of the fixing block (613) is rotatably connected to the inside of the screw (612) through a bearing seat. The first lead screw seat (611) has two circular through holes with the screw (612) as the center. The end of the screw (612) away from the fixing block (613) extends to the outside of the first lead screw seat (611) and is fixedly connected to a rotating handle. The limiting rod is slidably connected inside the circular through hole, and one end of the limiting rod is fixedly connected to the outer wall of the fixing block (613).

6. The non-destructive testing instrument for early cracks in metal plates based on magnetic memory effect according to claim 5, characterized in that, The automatic feeding and discharging assembly (7) includes: The drive wheel (701) is fixed to the outer circumference of the rotating shaft (606); The driven wheel (702) is connected to the top side of the driving wheel (701) via a transmission belt, and the driven wheel (702) is located on the top side inside the worktable (1); A fixed shaft (703) is fixedly connected inside the driven wheel (702), and the fixed shaft (703) is rotatably connected inside the worktable (1); A reciprocating screw (704) is fixedly connected to one end of a fixed shaft (703), and the other end of the reciprocating screw (704) is rotatably connected inside the worktable (1). The pitch of the reciprocating screw (704) is greater than the pitch of the forward and reverse screw (610). The second lead screw seat (705) is connected to the outer periphery of the reciprocating lead screw (704), and the top of the second lead screw seat (705) extends to the outside of the worktable (1). The second lead screw seat (705) is slidably connected to the inside of the worktable (1). The feeding frame (706) is fixedly connected to the top side of the second lead screw seat (705), and the feeding frame (706) is set above the workbench (1).

7. The non-destructive testing instrument for early cracks in metal plates based on magnetic memory effect according to claim 6, characterized in that, The automatic feeding and discharging assembly (7) also includes: Multiple fourth springs, one end of which is fixed to one side of the bottom of the feeding frame (706); A sliding plate (707) is fixedly connected to the other side of the fourth spring on one side, and the sliding plate (707) is slidably connected inside the feeding frame (706); Two first toothed plates (708) are symmetrically fixed on both sides of the bottom of the sliding plate (707), and the first toothed plates (708) are slidably connected inside the feeding frame (706); Two limiting blocks (709) are respectively set on the side away from the first toothed plate (708), and the limiting blocks (709) are fixed to the top of the worktable (1) by the support base.

8. The non-destructive testing instrument for early cracks in metal plates based on magnetic memory effect according to claim 7, characterized in that, The automatic feeding and discharging assembly (7) also includes: Multiple first telescopic sleeves (710) are disposed between multiple fourth springs, and the first telescopic sleeves (710) are disposed on the side opposite to the fourth spring; Two sets of first rollers (711) are respectively set between two first toothed plates (708), and each set of first rollers (711) is composed of multiple first rollers (711); Two sets of support plates (712) are symmetrically arranged with the feed frame (706) as the center. Each set of support plates (712) consists of multiple support plates (712), and one side of the support plate (712) is fixedly connected to the outer wall of the first roller (711). Two sets of second springs (713) are arranged symmetrically with respect to the feed frame (706). Each set of second springs (713) consists of multiple second springs (713). The multiple second springs (713) are arranged symmetrically with respect to the support plate (712). The two sides of the second springs (713) are fixedly connected to one side of the first roller (711) and the inner wall of the feed frame (706), respectively.

9. The non-destructive testing instrument for early cracks in metal plates based on magnetic memory effect according to claim 8, characterized in that, The automatic feeding and discharging assembly (7) also includes: A flat plate (714) is fixed to the side of the first toothed plate (708) away from the sliding plate (707); The first cone block (715) is fixed to the other side of the top of the plate (714); The second cone (716) has its inclined surface attached to the inclined surface of the first cone (715); A connecting rod (717) is fixedly connected to one side of the second cone block (716), and the connecting rod (717) is slidably connected inside the feeding frame (706). The other end of the connecting rod (717) is fixedly connected to a second toothed plate (718). Multiple second rollers (719) are all disposed on one side of the second toothed plate (718), and the second rollers (719) are disposed on the side opposite to the first telescopic sleeve (710), and the first telescopic sleeve (710) and the second rollers (719) are on the same axis; The second telescopic sleeve (720) is fixedly connected to the side of the connecting rod (717) away from the second toothed plate (718). Both the second telescopic sleeve (720) and the first telescopic sleeve (710) are slidably connected inside the feeding frame (706). Multiple sets of third springs (721) are respectively set on one side of the second roller (719). Each set of third springs (721) consists of two third springs (721), and the two third springs (721) are symmetrically arranged with the second telescopic sleeve (720) as the center.

10. The non-destructive testing instrument for early cracks in metal plates based on magnetic memory effect according to claim 9, characterized in that, Also includes: An airbag (8) is set between two first springs (603), and the two sides of the airbag (8) are fixedly connected to the bottom of the horizontal plate (602) and the inner wall of the worktable (1), respectively. One-way air outlet tube, one end of which is connected to the air bag (8), and the other end of the one-way air outlet tube is connected to an inner cavity, which is set inside the fixed block (613); Multiple air outlets are located inside the fixed block (613) on one side relative to the center of the worktable (1), and the other side of the air outlets is connected to the inner cavity; One-way air intake pipe, one end of which is connected to the airbag (8).

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