Electromagnetic acoustic emission nondestructive testing device for metal parts

Abstract

The invention discloses an electromagnetic acoustic emission nondestructive testing device for metal parts. The electromagnetic acoustic emission nondestructive testing device comprises a part testing unit and a part moving unit, the part detection unit comprises a box body which has a first direction and a second direction which are perpendicular to each other and is internally provided with a sliding groove extending in the first direction; the driving unit is arranged in the box body, and a PC is further arranged on the driving unit; one end of the mechanical arm is connected to the driving unit and is driven by the driving unit, and the other end of the mechanical arm is connected with the pulse vortex generator, the piezoelectric sensor and the pre-amplifier; the lifting unit is arranged in the box body and at least comprises a part detection workbench with a second direction adjusting freedom degree and a first conveying mechanism; the two part moving units have the degree of freedom of adjustment in the second direction, the two part moving units can move to be in butt joint with the two ends of the first conveying mechanism respectively, one part moving unit is used for conveying the borne to-be-detected parts to the first conveying mechanism, and the other part moving unit is used for collecting the detected parts on the first conveying mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of metal parts detection devices, and in particular to an electromagnetic acoustic emission nondestructive detection device for metal parts. Background Art

[0002] Acoustic emission nondestructive testing is a testing technology based on the acoustic emission phenomenon. It detects transient ultrasonic waves generated by the deformation of materials or structures due to external or internal forces. Acoustic emission nondestructive testing can detect whether there are internal structural abnormalities or defects in internal parts without disassembling external parts.

[0003] In the development of modern industry, determining the integrity of parts before they enter service is a necessary process for factory delivery. The advantage of acoustic emission testing is that it can perform non-destructive testing without damaging the object (part) being tested, and can achieve full coverage of the entire object being tested, which can significantly reduce industrial costs. However, most current non-destructive testing devices lack a relatively complete industrial design, which requires operators to perform excessive operations during the testing process, resulting in a low degree of automation and low testing efficiency, making them unable to meet the high automation requirements of modern industry. Summary of the Invention

[0004] The purpose of the present invention is to design an electromagnetic acoustic emission nondestructive testing device for metal parts to solve the problem that the existing nondestructive testing devices for parts have a high degree of reliance on manual operation, resulting in low automation and detection efficiency.

[0005] To achieve the above object, the present invention is achieved through the following technical solutions:

[0006] The present invention designs a nondestructive testing device for electromagnetic acoustic emission of metal parts, which includes: a part detection unit and two freely movable part moving units;

[0007] Wherein, the parts detection unit includes the following structural settings:

[0008] The box has a first direction and a second direction (height direction) perpendicular to each other, and a sliding groove extending in the first direction is provided inside the box;

[0009] The drive unit is arranged in the box and a PC is also arranged on the box;

[0010] a robotic arm, one end of which is connected to the driving unit and driven thereby to move in a first direction, and the other end of which is connected to a pulsed eddy current generator, a piezoelectric sensor, and a preamplifier electrically connected to the PC;

[0011] a lifting unit disposed inside the box and below the robotic arm, the lifting unit comprising at least a parts inspection workbench having a second degree of freedom of adjustment and a first conveying mechanism disposed on the parts inspection workbench and capable of conveying metal parts in a first direction;

[0012] In which, the part moving unit has the freedom of adjustment in the second direction, and the two part moving units can be moved respectively to dock with the two ends of the first direction of the first conveying mechanism. One of the part moving units is used to transfer the carried metal parts to be inspected to the first conveying mechanism, and the other part moving unit is used to collect the metal parts that have been inspected on the first conveying mechanism.

[0013] Specifically, the nondestructive testing device designed by the present invention is an electromagnetic acoustic emission nondestructive testing device for metal parts based on multi-physical field coupling. The technical problem it aims to solve is that in the existing nondestructive testing process of parts, operators need to perform too many operations in the testing process, which cannot meet the process requirements of modern industry. Now, an electromagnetic acoustic emission nondestructive testing device for metal parts is provided, which can meet the process requirements of (automated) metal parts testing.

[0014] Furthermore, a nondestructive testing device for electromagnetic acoustic emission of metal parts is provided: the box body is provided with a front door and a rear door on both sides of the first direction; the two part moving units are docked with the two ends of the first conveying mechanism from the front door and the rear door of the box body respectively.

[0015] Furthermore, a device for electromagnetic acoustic emission nondestructive testing of metal parts: the driving unit includes the following structural arrangement:

[0016] a first driving motor, which is arranged on the box body;

[0017] a first screw rod, which is arranged inside the box and rotates along a first direction and is driven to rotate by the first driving motor;

[0018] and a moving block, which is threadedly connected to the first screw rod and is slidably disposed in the sliding groove;

[0019] The mechanical arm and the PC are connected to the moving block.

[0020] Furthermore, a device for electromagnetic acoustic emission nondestructive testing of metal parts: the drive unit also includes a first bearing and a first mounting plate respectively arranged inside and outside the box; one end of the first screw rod is connected to the first bearing, and the first drive motor is arranged on the first mounting plate.

[0021] Furthermore, a nondestructive testing device for electromagnetic acoustic emission of metal parts: the lifting unit includes the following structural settings:

[0022] A parts inspection workbench, which is configured as a hollow structure and is disposed inside the box along a first direction;

[0023] a first conveying mechanism, which is provided on the part inspection workbench and is used to convey the metal part in a first direction;

[0024] a second driving motor, which is arranged on the parts detection workbench;

[0025] A second screw rod is arranged inside the part detection workbench and rotates along the first direction and is driven to rotate by the second drive motor;

[0026] a plurality of first threaded sleeves fixedly disposed inside the box;

[0027] a plurality of first bevel gears fixedly sleeved on the outside of the second screw rod;

[0028] a plurality of first threaded rods, which are rotatably disposed on the part inspection workbench along the second direction and have one end extending into the interior thereof and the other end being threadedly connected to the first threaded sleeve to form a screw structure;

[0029] A plurality of second bevel gears are fixedly disposed on the end of the first threaded rod and meshed with the first bevel gears.

[0030] Furthermore, a metal part electromagnetic acoustic emission nondestructive testing device: the lifting unit also includes a second bearing and a second mounting plate respectively arranged inside and outside the part detection workbench; the second screw rod is connected to the second bearing, and the second drive motor is arranged on the second mounting plate.

[0031] Furthermore, a metal parts electromagnetic acoustic emission nondestructive testing device: the lifting unit also includes a plurality of third bearings, which are fixedly arranged on the parts detection workbench; one end of the first threaded rod is passed through the third bearing and extends to the interior of the parts detection workbench.

[0032] Furthermore, a nondestructive testing device for electromagnetic acoustic emission of metal parts: the surface of the part detection workbench is also provided with a part slot.

[0033] Furthermore, a nondestructive testing device for electromagnetic acoustic emission of metal parts: the part moving unit includes the following structural arrangement:

[0034] base;

[0035] a handle disposed on the base;

[0036] a second threaded sleeve, which is fixedly mounted on the base;

[0037] A second threaded rod, one end of which is threadedly connected to the second threaded sleeve along the second direction to form a screw structure, and the other end of which is naturally extended;

[0038] a parts conveying platform, rotatably connected to one end of the naturally extended second threaded rod;

[0039] a third driving motor, which is fixedly disposed in the parts conveying platform and is used to drive the second threaded rod to rotate;

[0040] a baffle, which is provided on the base and / or the handle and extends to the parts conveying platform to limit the rotation of the parts conveying platform;

[0041] a second conveying mechanism, which is disposed on the parts conveying platform and can be docked with the first conveying mechanism;

[0042] and a plurality of rollers which are arranged on the base, wherein the rollers are provided with brake plates.

[0043] Furthermore, a device for electromagnetic acoustic emission nondestructive testing of metal parts: the part moving unit also includes a fourth bearing and a guardrail; the fourth bearing is fixedly arranged on the part conveying platform, and one end of the second threaded rod is passed through the fourth bearing and extends to the interior of the part conveying platform; the guardrail is arranged on the part conveying platform to prevent metal parts from falling.

[0044] Beneficial effects of the present invention:

[0045] The electromagnetic acoustic emission nondestructive testing device for metal parts designed by the present invention can adjust the height of the part inspection workbench, thereby allowing for flexible adjustments based on the height requirements of different operators, making it more suitable. The nondestructive testing device designed by the present invention can directly place multiple metal parts on the part conveying platform (part moving unit), which are then transferred to the first conveying mechanism via the second conveying mechanism. The operator then places the parts into the part slot in the middle of the part inspection workbench. The drive unit and the robotic arm then move the parts according to the corresponding part area. The pulsed eddy current generator, piezoelectric sensor, preamplifier, and PC on the parts are used to perform nondestructive testing on the parts. After inspection, the metal parts are placed back on the first conveying mechanism and transferred to another part moving unit via the second conveying mechanism for collection, thus achieving a streamlined operation.

[0046] It can be seen that the non-destructive testing device designed by the present invention requires less manual operation during the metal parts inspection process, has a high degree of automation, can greatly improve the inspection efficiency, and solves the problems of existing parts non-destructive testing devices that are highly dependent on manual operation, have low inspection efficiency, and cannot meet the high automation (process) requirements of modern industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0048] Figure 1 Schematic diagram of the structure of the electromagnetic acoustic emission nondestructive testing device for metal parts designed for Example 1 of the present invention.

[0049] The following are marked in the figure:

[0050] 1-Box, 2-Drive unit, 3-Robot arm, 4-Lifting unit, 5-Pulse eddy current generator, 6-Piezoelectric sensor, 7-Preamplifier, 8-PC, 9-Part moving unit, 11-Slide, 12-Box front door, 13-Box rear door, 21-First drive motor, 22-First screw rod, 23-Moving block, 24-First bearing, 25-First mounting plate, 40-Second mounting plate, 41-Parts detection workbench, 42-First transmission mechanism, 43-Second drive motor , 44-second screw rod, 45-first threaded sleeve, 46-first bevel gear, 47-first threaded rod, 48-second bevel gear, 49-second bearing, 50-third bearing, 411-parts slot, 90-base, 91-handle, 92-second threaded sleeve, 93-second threaded rod, 94-parts conveying platform, 95-third drive motor, 96-baffle, 97-second conveying mechanism, 98-roller, 99-brake plate, 100-fourth bearing, 101-guardrail. DETAILED DESCRIPTION

[0051] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0053] Example 1

[0054] like Figure 1 As shown, a metal part electromagnetic acoustic emission nondestructive testing device includes: a part detection unit and two freely movable part moving units 9;

[0055] Wherein, the parts detection unit includes the following structural settings:

[0056] The box body 1 has a first direction and a second direction perpendicular to each other, and is provided with a slide groove 11 extending in the first direction. The box body 1 is also provided with a front door 12 and a rear door 13 on both sides of the first direction respectively;

[0057] The drive unit 2 includes a first drive motor 21 (servo motor), a first screw rod 22, a moving block 23, a first bearing 24 and a first mounting plate 25. The first mounting plate 25 is fixedly arranged on the outside of the box body 1, the first drive motor 21 is fixedly arranged on the first mounting plate 25, the first bearing 24 is fixedly arranged inside the box body 1, the first screw rod 22 is rotatably arranged in the first bearing 24 along a first direction and is driven to rotate by the first drive motor 21, the moving block 23 is threadedly connected to the first screw rod 22 to form a screw structure, the moving block 23 is also slidably arranged in the slide groove 11, and the slide groove 11 is used to limit the moving block 23 to move back and forth in the first direction. The PC 8 is also provided on the moving block 23;

[0058] a robotic arm 3, one end of which is connected to the moving block 23 and driven thereby to move in a first direction, and the other end of which is connected to a pulsed eddy current generator 5, a piezoelectric sensor 6, and a preamplifier 7, wherein the preamplifier 7 is electrically connected to a PC 8;

[0059] The lifting unit 4 is arranged inside the box 1 and below the robotic arm 3. The lifting unit 4 includes the following structural settings:

[0060] The parts inspection workbench 41 is a hollow structure, which is arranged inside the box 1 along the first direction, and a parts slot 411 is provided on its surface;

[0061] a first conveying mechanism 42 , which is disposed on the part inspection workbench 41 and is used to convey the metal part in a first direction;

[0062] A second mounting plate 40 is fixedly mounted on the outside of the part detection workbench 41 , and the second drive motor 43 (servo motor) is fixedly mounted on the second mounting plate 40 ;

[0063] A second bearing 49 is fixedly disposed inside the part inspection workbench 41 , and the second screw rod 44 is rotatably disposed in the second bearing 49 along a first direction and is driven to rotate by the second drive motor 43 ;

[0064] Two first threaded sleeves 45, which are fixedly arranged inside the box body 1;

[0065] Two first bevel gears 46 , which are fixedly sleeved on the outside of the second screw rod 44 ;

[0066] Two third bearings 50 are fixedly mounted on the part inspection workbench 41. One end of two first threaded rods 47 passes through the third bearings 50 and extends into the interior of the part inspection workbench 41. The other end is threadedly connected to the first threaded sleeve 45 to form a screw structure. The first threaded rods 47 are arranged along the second direction.

[0067] Two second bevel gears 48 , which are fixedly disposed on the ends of the first threaded rod 47 and mesh with the first bevel gear 46 ;

[0068] The part moving unit 9 has a second degree of freedom of adjustment in the second direction. The two part moving units 9 can be moved to dock with the two ends of the first conveying mechanism 42 in the first direction, respectively. One of the part moving units 9 is used to transfer the metal parts to be inspected to the first conveying mechanism 42, and the other part moving unit 9 is used to collect the inspected metal parts on the first conveying mechanism 42.

[0069] Wherein, the part moving unit includes the following structural settings:

[0070] Base 90;

[0071] A handle 91 is provided on the base 90 and can be made of rubber;

[0072] A second threaded sleeve 92 , which is fixedly mounted on the base 90 ;

[0073] A second threaded rod 93 , one end of which is threadedly connected to the second threaded sleeve 92 along the second direction to form a screw structure, and the other end of which is naturally extended;

[0074] The parts conveying platform 94 is provided with a fourth bearing 100. One end of the second threaded rod 93 extends naturally through the fourth bearing 100 and extends into the interior of the parts conveying platform 94. The parts conveying platform 94 is also provided with a guardrail 101 to prevent the loaded metal parts from falling.

[0075] a third drive motor (servo motor) 95 , which is fixedly disposed in the parts conveying platform 94 and is used to drive the second threaded rod 93 to rotate;

[0076] a baffle 96 disposed on the base 90 and extending to the parts conveying platform 94 to limit the rotation of the parts conveying platform 94;

[0077] A second conveying mechanism 97 is provided on the parts conveying platform 94 and can be docked with the first conveying mechanism 42;

[0078] And a plurality of rollers 98 are arranged on the base 90, and a brake plate 99 is also arranged on the rollers 98.

[0079] Specifically, the electromagnetic acoustic emission nondestructive testing device for metal parts designed in Example 1 can be provided with handles on the front door 12 and the rear door 13 of the box body, respectively. A first conveying mechanism 41 is provided on the part inspection workbench 41, which is connected to the outside of the box body 1 for transporting metal parts. A driving unit 2 is provided above the part inspection workbench 41. The nondestructive testing device of Example 1 can control the movement of the robotic arm 3 to the surface of the metal part to be inspected through a screw structure, and the pulse eddy current generator 5 sends a pulse current, which is loaded onto the metal part to be inspected. If there is a crack in the metal part to be inspected, an acoustic emission signal will be stimulated. The acoustic emission signal is detected by the piezoelectric sensor 6 and input into the preamplifier 7 through the signal line. The preamplifier 7 amplifies the acoustic emission signal and inputs it into the PC 8. The PC 8 performs two-dimensional time difference positioning based on the collected acoustic emission signal to locate and detect the crack defect in the metal part to be inspected.

[0080] In Example 1, a part slot 411 is set in the center of the part inspection workbench 41, which can be used to fix the metal parts transmitted through the first conveying structure 42. A circular groove can also be set around the part slot 411 to facilitate placing the parts into the slot and fixing them. The excitation coil in the pulse eddy current generator 5 is moved above the part slot 411.

[0081] Specifically, in Example 1, the front door 12 and the rear door 13 of the box body can be set as double doors, and rubber handles can be set thereon. The front door 12 and the rear door 13 of the box body can be fixed by setting magnetic suction at the corners.

[0082] In Example 1, the second drive motor 43 drives the second screw rod 44 to rotate, thereby driving the two first bevel gears 46 on the second screw rod 44 to rotate. The two first bevel gears 46 respectively drive the two second bevel gears 48 meshing therewith to rotate, and then the two second bevel gears 48 continue to drive the first threaded rod 47 to rotate in the third bearing 50 and the first threaded sleeve 45, and a screw structure can be formed between the first threaded rod 47 and the first threaded sleeve 45. Therefore, after the first threaded rod 47 rotates, the height of the part inspection workbench 41 can be adjusted, specifically according to the height operation requirements of the operator. Then, the operator takes the metal parts conveyed by the second conveying mechanism 97 and the first conveying mechanism 42 and places them in the part slot 411 of the part inspection workbench 41, and then turns on the pulse eddy current generator 5 (flaw detector) through the operation button, and then performs non-destructive flaw detection on the metal parts through the piezoelectric sensor 6, and then moves through the drive unit 2, and then enables the pulse eddy current generator 5 to perform non-destructive flaw detection on other locations of the metal parts, thereby improving practicality.

[0083] The first and second conveying mechanisms mentioned in the present invention are common structural settings, which at least include conveying rollers, conveyor belts, and motors that drive the conveying rollers to rotate. The automated first and second conveying mechanisms can facilitate operators to repeatedly detect multiple parts, thereby improving convenience. In addition, the part moving unit 9 in the present invention has the function of lifting and lowering (i.e., it has the freedom of adjustment in the second direction). In Example 1, a structure is provided that uses a screw structure formed between the second threaded rod 93 and the second threaded sleeve 92 to perform lifting and lowering adjustment. It can also be provided with a device with a telescopic function to connect the base 90 and the part conveying platform 94 to achieve the adjustment of the lifting and lowering of the part conveying platform 94. Specifically, as long as the purpose of adjusting the height of the part conveying platform 94 in the second direction can be met, it will be sufficient.

[0084] Specifically, in Example 1, the second conveying mechanism 97 can be arranged at an angle to facilitate smooth transfer of metal parts to the first conveying mechanism 42. The lowest point of the inclined second conveying mechanism 97 should not be lower than the height of the first conveying mechanism 42. The purpose of providing the part moving unit 9 with a second degree of freedom of adjustment in the second direction is that after the height of the lifting unit 4 (first conveying mechanism 42) is changed, the height of the part moving unit 9 can be adjusted synchronously so that the second conveying mechanism 97 can be smoothly docked with the first conveying mechanism 42, ensuring that the height of the second conveying mechanism 97 in the part moving unit 9 is not lower than the first conveying mechanism 42, thereby facilitating the transfer of the metal parts to be inspected on the second conveying mechanism 97 to the first conveying mechanism 42, and then the metal parts are further transported by the first conveying mechanism 42. Then, the operator takes the metal parts from the first conveying mechanism 42 and places them in the part slot 411. Then, the pulsed eddy current generator 5, the piezoelectric sensor 6, the preamplifier 7 and the PC 8 complete the non-destructive testing of the metal parts. After the inspection is completed, the metal parts in the parts slot 411 are removed and then sequentially transported to another parts moving unit 9 by the first conveying mechanism 42 and the second conveying mechanism 97. Preferably, a robotic arm can be additionally provided to replace the operator to grab the metal parts on the first conveying mechanism 42 and place them in the parts slot 411, further improving the degree of automation and improving the inspection efficiency.

[0085] The first conveying mechanism 42, the second conveying mechanism 97, the robotic arm 3, the first drive motor 21, the second drive motor 43, the pulsed eddy current generator 5, the piezoelectric sensor 6, the preamplifier 7, and the PC 8 in Example 1 can be automatically controlled by a control system (not shown). Furthermore, after docking with the first conveying mechanism 42, the part moving unit 9 can also be connected to the control system and controlled by the control system.

[0086] The above preferred embodiments of the present invention are only used to explain the present invention and are not used to limit the present invention. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A nondestructive testing device for electromagnetic acoustic emission of metal parts, characterized in that: The device comprises: a parts detection unit and two freely movable parts moving units (9); Wherein, the parts detection unit includes the following structural settings: The box body (1) has a first direction and a second direction perpendicular to each other, and a sliding groove (11) extending in the first direction is provided inside the box body; A drive unit (2) is arranged in the housing (1) and a PC (8) is also arranged thereon; A robotic arm (3), one end of which is connected to the driving unit (2) and driven thereby to move in a first direction, and the other end of which is connected to a pulsed eddy current generator (5), a piezoelectric sensor (6), and a preamplifier (7) electrically connected to the PC (8); A lifting unit (4) is arranged inside the box (1) and below the robotic arm (3), the lifting unit (4) comprising at least a part detection workbench (41) having a second direction adjustment degree of freedom and a first conveying mechanism (42) arranged on the part detection workbench (41) and capable of conveying metal parts in a first direction; The part moving unit (9) has a second degree of freedom of adjustment in the second direction, and the two part moving units (9) can be respectively moved to dock with the two ends of the first direction of the first conveying mechanism (42), one of the part moving units (9) is used to convey the carried metal parts to be inspected to the first conveying mechanism (42), and the other part moving unit (9) is used to collect the metal parts that have been inspected on the first conveying mechanism (42).

2. The electromagnetic acoustic emission nondestructive testing device for metal parts according to claim 1, characterized in that: The box body (1) is provided with a box body front door (12) and a box body rear door (13) on both sides in a first direction; two parts moving units (9) are docked with two ends of the first conveying mechanism (42) from the box body front door (12) and the box body rear door (13) respectively.

3. The electromagnetic acoustic emission nondestructive testing device for metal parts according to claim 1, characterized in that: The driving unit (2) includes the following structural configuration: a first driving motor (21), which is arranged on the box (1); a first screw rod (22) which is arranged inside the box (1) and rotates along a first direction and is driven to rotate by the first drive motor (21); and a moving block (23) threadedly connected to the first screw rod (22) and slidably disposed in the sliding groove (11); The mechanical arm (3) and the PC (8) are connected to the moving block (23).

4. The electromagnetic acoustic emission nondestructive testing device for metal parts according to claim 3, characterized in that: The drive unit (2) further includes a first bearing (24) and a first mounting plate (25) respectively arranged inside and outside the housing (1); One end of the first screw rod (22) is connected to the first bearing (24), and the first drive motor (21) is arranged on the first mounting plate (25).

5. The electromagnetic acoustic emission nondestructive testing device for metal parts according to claim 1, characterized in that: The lifting unit (4) includes the following structural configuration: A parts inspection workbench (41) is configured as a hollow structure and is disposed inside the box (1) along a first direction; a first conveying mechanism (42) disposed on the part detection workbench (41) for conveying metal parts in a first direction; a second driving motor (43), which is arranged on the parts detection workbench (41); a second screw rod (44) which is arranged inside the part detection workbench (41) and rotates along a first direction and is driven to rotate by the second drive motor (43); A plurality of first threaded sleeves (45) fixedly disposed inside the box (1); a plurality of first bevel gears (46) fixedly sleeved on the outside of the second screw rod (44); a plurality of first threaded rods (47) rotatably disposed on the part inspection workbench (41) along a second direction, one end of which extends into the interior thereof and the other end of which is threadably connected to the first threaded sleeve (45) to form a screw structure; A plurality of second bevel gears (48) are fixedly arranged at the end of the first threaded rod (47) and meshed with the first bevel gear (46).

6. The electromagnetic acoustic emission nondestructive testing device for metal parts according to claim 5, characterized in that: The lifting unit (4) further includes a second bearing (49) and a second mounting plate (40) respectively arranged inside and outside the part detection workbench (41); The second screw rod (44) is connected to the second bearing (49), and the second drive motor (43) is arranged on the second mounting plate (40).

7. The electromagnetic acoustic emission nondestructive testing device for metal parts according to claim 5, characterized in that: The lifting unit (4) further includes a plurality of third bearings (50) fixedly arranged on the part detection workbench (41); one end of the first threaded rod (47) is passed through the third bearings (50) and extends to the interior of the part detection workbench (41).

8. The electromagnetic acoustic emission nondestructive testing device for metal parts according to claim 5, characterized in that: The surface of the parts detection workbench (41) is also provided with a parts clamping groove (411).

9. The electromagnetic acoustic emission nondestructive testing device for metal parts according to claim 1, characterized in that: The part moving unit (9) includes the following structural arrangement: base (90); a handle (91) disposed on the base (90); a second threaded sleeve (92) fixedly mounted on the base (90); A second threaded rod (93), one end of which is threadedly connected to the second threaded sleeve (92) along the second direction to form a screw structure, and the other end of which is naturally extended; a parts conveying platform (94) rotatably connected to one end of the naturally extended second threaded rod (93); a third driving motor (95), which is fixedly disposed in the parts conveying platform (94) and is used to drive the second threaded rod (93) to rotate; a baffle (96) disposed on the base (90) and / or the handle (91) and extending to the parts conveying platform (94) to limit the rotation of the parts conveying platform (94); a second conveying mechanism (97), which is disposed on the parts conveying platform (94) and can be docked with the first conveying mechanism (42); and a plurality of rollers (98) which are arranged on the base (90), wherein the rollers (98) are further provided with brake plates (99).

10. The electromagnetic acoustic emission nondestructive testing device for metal parts according to claim 9, characterized in that: The part moving unit further includes a fourth bearing (100) and a guardrail (101); the fourth bearing (100) is fixedly arranged on the part conveying platform (94), and one end of the second threaded rod (93) is passed through the fourth bearing (100) and extends to the interior of the part conveying platform (94); the guardrail (101) is arranged on the part conveying platform (94) to prevent metal parts from falling.

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