CN212872294U

CN212872294U - Precision part magnetic particle testing device

Info

Publication number: CN212872294U
Application number: CN202021716731.3U
Authority: CN
Inventors: 李卫; 李颖珊
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-04-02
Anticipated expiration: 2030-08-18

Abstract

The utility model discloses a magnetic powder testing device for precision parts, which relates to the technical field of magnetic powder testing and comprises a first coil component and a second coil component which are arranged in a box body, wherein the first end of the first coil component is connected with a screw rod which runs through the side wall of the first end of the box body; a fixed screw sleeve is arranged in the side wall of the first end of the box body, and a screw is arranged in the fixed screw sleeve; the side wall of the second end of the box body is connected with a supporting shaft, the other end of the supporting shaft is connected with the first end of the second coil assembly, an elastic piece is arranged between the second coil assembly and the side wall of the box body, and a detachable object is connected between the second end of the first coil assembly and the second end of the second coil assembly; the first binding post and the second binding post are respectively electrically connected with the second coil assembly, and the third binding post and the fourth binding post are respectively electrically connected with the first coil assembly. The utility model discloses avoid part mechanical damage and burn, also eliminated the detection blind area, convenient to use, easy operation.

Description

Precision part magnetic particle testing device

Technical Field

The utility model relates to a magnetic particle testing technical field, concretely relates to precision parts magnetic particle testing device.

Background

Magnetic particle inspection is also known as magnetic particle inspection or magnetic particle inspection. The method is one of five conventional nondestructive testing methods which are widely applied, and the nondestructive testing objects are ferromagnetic materials comprising unprocessed raw materials, processed semi-finished products, finished products and parts in use. After the ferromagnetic material is magnetized, the existence of discontinuity can make the magnetic force lines on the surface and near surface of the material produce local distortion, and make the magnetic force lines escape from the surface of the material to form leakage magnetic field to adsorb magnetic powder, and form magnetic mark which can be seen under the proper illumination, and can show the position, shape and size of discontinuity, then according to the related standard the magnetic mark display can be observed, explained and evaluated.

The magnetic powder detection is carried out according to six steps of pretreatment, magnetization, magnetic suspension application, magnetic mark display observation and evaluation, demagnetization and post-treatment. Depending on the geometry of the part, different magnetization methods can be used to magnetize the part directly or indirectly in circumferential, longitudinal, or multidirectional directions. Circumferential magnetization, wherein the circumferential magnetization mainly adopts an electrifying method, a central conductor method, an induction current method and the like; longitudinal magnetization, wherein the longitudinal magnetization mainly comprises a coil method, a magnetic yoke method and the like; and (3) multidirectional magnetization, namely, applying two magnetic fields in different directions on the part at the same time, wherein the direction of the synthesized magnetic field is continuously changed on the part, and the defects in different directions on the part can be detected by one-time magnetization.

In the circumferential magnetization method, an energization method is necessary for magnetizing a part other than the through-hole in the circumferential direction. Although the magnet yoke method can be used for carrying out repeated magnetization in all directions for carrying out supplementary inspection, parts with small volume cannot be operated, mechanical damage to the surfaces of the parts is easy to cause, the operation is inconvenient, and the efficiency is low; the existing common magnetic powder detection method comprises the steps of generating a longitudinal magnetic field by a coil method, detecting circumferential defects, putting a part into the coil to enable the axis of the part to be parallel to the axis of the coil, magnetizing the part by using the longitudinal magnetic field generated by the coil, and continuously detecting the circumferential defects of the cylindrical surface of the part under proper illumination. The method comprises the steps of generating a circumferential magnetic field by an electrifying method, checking longitudinal defects, clamping two end faces of a part by two electrodes of a magnetic powder flaw detector, then electrifying current with proper magnitude, enabling the part to generate a circumferential magnetic field perpendicular to the current direction, and checking the longitudinal defects on the outer surface of the part under proper illumination after pouring magnetic suspension; if the remanence method is adopted (after the magnetization is finished, the part is taken off to pour the magnetic suspension, and the part is parked for 1 minute and then is inspected), the radial defect of the end face can be inspected, but the circumferential defect of the end face cannot be inspected. Coated parts do not allow the use of remanence.

The electrical method is a contact magnetization method, which may cause mechanical damage to the clamping surface of the part, and burn the part due to large current and small contact surface or poor contact, and the presence of a detection blind area is detected by an electrical method magnetization continuous method. The magnetization of precision parts, especially precision parts with small volume, is always a difficult point for magnetic powder detection. Detection has blind areas, is difficult to operate due to small volume, and sometimes occurs when parts are damaged during detection. A precision part magnetic particle testing device is needed to solve the problems that a blind zone exists in precision part magnetic particle testing, mechanical damage and burning of precision parts in the testing process are caused, and the precision parts are difficult to operate due to small size.

Disclosure of Invention

The utility model provides an above-mentioned problem, a precision parts magnetic particle testing device is provided, there is the blind area in the precision parts magnetic particle testing of solution to and the precision parts mechanical damage and the problem of burn, precision parts difficulty of operation because of small in the magnetic particle testing process in the magnetization process.

The utility model adopts the technical scheme as follows: the device comprises a box body, a fixed threaded sleeve, a screw rod, a first coil assembly, a supporting shaft, an elastic piece, a second coil assembly and an object placing piece;

a first coil assembly and a second coil assembly are arranged in the box body, a first end of the first coil assembly is connected with a screw rod, and the screw rod penetrates through the side wall of the first end of the box body;

a fixed threaded sleeve is arranged in the side wall of the first end of the box body, the screw rod is arranged in the fixed threaded sleeve, and the screw rod penetrates through the fixed threaded sleeve;

the side wall of the second end of the box body is connected with a support shaft, the other end of the support shaft is connected with the first end of the second coil assembly, the support shaft is arranged in the first end of the second coil assembly in a sliding connection mode, an elastic piece is arranged between the first end of the second coil assembly and the side wall of the second end of the box body, and the elastic piece is sleeved on the support shaft;

a detachable object is connected between the second end of the first coil component and the second end of the second coil component;

a first binding post, a second binding post, a third binding post and a fourth binding post are sequentially arranged on the side wall of the third end of the box body; the first wiring terminal and the second wiring terminal are respectively and electrically connected with the second coil assembly, and the third wiring terminal and the fourth wiring terminal are respectively and electrically connected with the first coil assembly.

Further, the first coil assembly and the second coil assembly each comprise an inner housing, a cable assembly, an electrode, and an outer housing; an inner shell is arranged in the outer shell, a cable assembly is arranged between the outer shell and the inner shell, a first limiting groove is arranged in a first end of the inner shell, and an electrode and a second limiting groove are respectively arranged in a second end of the inner shell;

the screw and the support shaft are respectively arranged in first limiting grooves in the first coil assembly and the second coil assembly, the support shaft is arranged in the first limiting grooves in a sliding connection mode, and two ends of the object are respectively detachably arranged in second limiting grooves in the first coil assembly and the second coil assembly;

the first binding post and the second binding post are respectively and electrically connected with a cable assembly in the second coil assembly, and the third binding post and the fourth binding post are respectively and electrically connected with a cable assembly in the first coil assembly.

Further, the cable assembly comprises a coil and a contact head, and the contact head is electrically connected with the first binding post, the second binding post, the third binding post and the fourth binding post respectively.

Furthermore, a rolling bearing is arranged in a first limiting groove in the first coil assembly, and the screw rod is installed in the rolling bearing.

Furthermore, a rotating hand wheel is connected outside the screw rod.

Further, the object placing piece is an insulating supporting plate or an insulating chuck or a silicon steel bar or a conductive supporting plate or a conductive chuck.

Furthermore, a cooling fan is arranged on the shell.

The utility model has the advantages that:

the utility model provides an accurate part magnetic particle testing device, drive the screw rod through rotatory hand wheel and rotate in fixed swivel nut, make first coil pack remove about, realize the coarse adjustment of two coil pack relative position, operate second coil pack and outwards slide on the back shaft, make the spring compression reset, the spring that resets exerts the elastic force to second coil pack, second coil pack inwards slides on the back shaft and presss from both sides the clamping and puts the article, realize the fine setting and the clamp of two coil pack relative position, place the part that needs the detection on putting the article, to first terminal, the second terminal, the third terminal, the fourth terminal cooperates different power connection combinations, realize different functions, then spray the magnetic to the part, detect;

the coil with small diameter and multiple turns is adopted, the magnetic field intensity of the coil is greatly increased, and each direction of the longitudinal magnetized part can have higher sensitivity, so that the need of electrifying and magnetizing for detecting longitudinal defects is avoided, the mechanical damage and burning of the part are avoided, and the detection blind area is eliminated; the arrangement of the object is arranged, so that the inspection of the coil by the longitudinal magnetization continuous method becomes simple and easy; the utility model discloses convenient to use, easy operation.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of the coil assembly of the present invention;

FIG. 3 is a schematic view of the structure of the insulating support plate of the present invention in a use state;

fig. 4 is a schematic structural view of the insulating support plate of the present invention;

fig. 5 is a schematic structural view of the insulating chuck of the present invention in a use state;

fig. 6 is a schematic view of the structure of the insulating chuck of the present invention;

FIG. 7 is a schematic view of the structure of the silicon steel bar of the present invention in a use state;

fig. 8 is a schematic structural view of the conductive chuck of the present invention in a use state;

fig. 9 is a schematic view of the conductive clip structure of the present invention.

Reference numerals:

1-box body, 2-fixed thread sleeve, 3-screw rod, 4-first coil component, 5-rotary hand wheel, 6-support shaft, 7-elastic component, 8-second coil component, 9-placing object, 10-inner shell, 11-cable component, 12-electrode, 13-shell, 14-part, P1-first binding post, P2-second binding post, P3-third binding post and P4-fourth binding post.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1 to 9, a magnetic powder testing device for precision parts includes a box 1, a fixed threaded sleeve 2, a screw rod 3, a first coil component 4, a supporting shaft 6, an elastic component 7, a second coil component 8 and an object placing component 9;

a first coil component 4 and a second coil component 8 are arranged in the box body 1, a first end of the first coil component 4 is rotatably connected with a screw rod 3, the screw rod 3 can rotate around the axis of the screw rod 3, the screw rod 3 extends into the first coil component 4 to support the first coil component 4, the screw rod 3 penetrates through the side wall of the first end of the box body 1, and a rotary hand wheel 5 is fixedly connected outside the screw rod 3;

a fixed threaded sleeve 2 is fixedly arranged in the side wall of the first end of the box body 1, a screw rod 3 is arranged in the fixed threaded sleeve 2 through threads, the screw rod 3 penetrates through the fixed threaded sleeve 2 and is connected with a rotating hand wheel 5, and the first coil component 4 is driven to move by controlling the rotation of the screw rod 3;

the side wall of the second end of the box body 1 is connected with a supporting shaft 6, the other end of the supporting shaft 6 is connected with the first end of a second coil assembly 8, the supporting shaft 6 is arranged in the first end of the second coil assembly 8 in a sliding connection mode, the supporting shaft 6 extends into the second coil assembly 8 to support the second coil assembly 8, an elastic part 7 is arranged between the first end of the second coil assembly 8 and the side wall of the second end of the box body 1, the elastic part 7 is sleeved on the supporting shaft 6, the preferable elastic part 7 is a spring, the spring is sleeved on the supporting shaft 6, and a detachable object placing part 9 is connected between the second end of the first coil assembly 4 and the second end of; the spring is compressed when external force is applied to the second coil component 8, and the opposite object 9 is reset to be clamped;

a first binding post P1, a second binding post P2, a third binding post P3 and a fourth binding post P4 are sequentially arranged on the side wall of the third end of the box body 1; first terminal P1 and second terminal P2 respectively with second coil subassembly 8 electric connection, third terminal P3 and fourth terminal P4 respectively with first coil subassembly 4 electric connection, conveniently cooperate different power connection combinations, realize different functions, preferred electric connection is flexible conductor wire electric connection, can not interfere the removal of first coil subassembly 4 and second coil subassembly 8.

The utility model provides a precision part magnetic particle testing device, during the use, through rotatory hand wheel 5, drive screw rod 3 at fixed swivel nut 2 internal rotation, the side-to-side movement of screw rod 3 makes first coil pack 4 side-to-side movement, realize the coarse adjustment of two coil pack relative position, operation second coil pack 8 outwards slides on back shaft 6, make the spring compress, install article 9 between first coil pack 4 and second coil pack 8, loosen second coil pack 8 and make the spring reset, the spring that resets exerts the elastic force to second coil pack 8, second coil pack 8 slides inwards on back shaft 6 and presss from both sides tight article 9, realize the fine setting and the clamp of two coil pack relative position, place part 14 that needs the detection on article 9, to first terminal P1, second terminal P2, third terminal P3, fourth terminal P4 cooperation different power connection combinations, different functions are realized, and then the magnetic powder is sprayed on the part for detection.

In an embodiment of the present invention, each of the first coil assembly 4 and the second coil assembly 8 includes an inner housing 10, a cable assembly 11, an electrode 12, and an outer housing 13; an inner shell 10 is arranged in an outer shell 13, the vertical sections of the inner shell 10 and the outer shell 13 are both of a circular structure, a cable assembly 11 is arranged between the outer shell 13 and the inner shell 10, the cable assembly 11 comprises a coil and a contact head, the coil is wrapped on the inner shell 10 and is wound in a single layer or multiple layers, a small-diameter multi-turn coil is preferably adopted, the magnetic field intensity of the coil is greatly increased, a first limiting groove is formed in a first end of the inner shell 10, and an electrode 12 and a second limiting groove are respectively arranged in a second end of the inner shell 10;

the screw rod 3 and the supporting shaft 6 are respectively arranged in first limiting grooves in the first coil component 4 and the second coil component 8, the supporting shaft 6 is arranged in the first limiting grooves in a sliding connection mode, and two ends of a placing object 9 are respectively detachably arranged in second limiting grooves in the first coil component 4 and the second coil component 8;

the first terminal P1 and the second terminal P2 are electrically connected to the cable assembly 11 in the second coil assembly 8, respectively, and the third terminal P3 and the fourth terminal P4 are electrically connected to the cable assembly 11 in the first coil assembly 4, respectively; the contact is respectively electrically connected with the first terminal P1, the second terminal P2, the third terminal P3 and the fourth terminal P4;

the first limiting groove in the first coil component 4 is internally and fixedly provided with a rolling bearing, the screw rod 3 is fixedly arranged in the rolling bearing, the number of the preferred rolling bearings is two, and the two ends of the first limiting groove are respectively arranged, so that the screw rod 3 can rotate around the axis of the screw rod 3 and can support the first coil component 4.

The utility model discloses an in the embodiment, two coil pack carry out the heat dissipation passively through shell 13 clearance, in order to increase the radiating efficiency, can install radiator fan additional on shell 13, carry out the initiative heat dissipation.

The utility model discloses an in the embodiment, four terminals of P1, P2, P3, P4 are by manual connection control, also can adopt jack connection, and the controller carries out switching control.

In an embodiment of the present invention, the screw rod 3 can be replaced by an electric hydraulic push rod or a pneumatic hydraulic push rod.

In an embodiment of the present invention, the object placing member 9 is an insulating supporting plate or an insulating chuck or a silicon steel rod or a conductive supporting plate or a conductive chuck.

Example one:

the first binding post P1 and the fourth binding post P4 are connected to a magnetic powder inspection power supply, the second binding post P2 and the third binding post P3 are in short circuit, an insulating accessory is clamped between electrodes, and a longitudinal magnetic field is generated when the power supply is switched on.

An insulating supporting plate is clamped between electrodes, a longitudinal shallow groove and a transverse shallow groove are formed in the insulating supporting plate, a part (such as a piston rod) is placed on the longitudinal shallow groove of the insulating supporting plate, longitudinal magnetization is carried out on the part by utilizing a longitudinal magnetic field of a coil, circumferential defects on the cylindrical surface of the part are inspected, the part is rotated by 180 degrees after the inspection is finished, and the operation is repeated.

The parts can also be placed on the transverse shallow grooves of the insulating supporting plate (the method is suitable for the parts which are small in size and inconvenient to clamp), the parts are magnetized transversely by utilizing the longitudinal magnetic field of the coil, and the longitudinal defects of the visible surface on the cylindrical surface of the parts, the radial defects of the end surface and the circumferential defects are inspected. After the inspection, the above operation was repeated 3 more times, each time rotating the part 90 °.

The special insulating chuck is clamped between the electrodes, a part (such as a piston rod) is clamped in the groove of the special insulating chuck in a standing mode, the part is magnetized in the transverse direction by utilizing the longitudinal magnetic field of the coil, and the longitudinal defect of the visible surface on the cylindrical surface of the part, the radial defect of the end face and the circumferential defect are detected. And after the inspection is finished, rotating the part by 90 degrees, and repeating the operation.

Through the operation, the defects in all directions on all surfaces of the part can be checked, the special insulating chuck is made of softer material, mechanical damage to the clamping surface cannot be caused, and burn cannot be caused due to the fact that direct electrification for contacting the part is not carried out.

Example two:

first terminal P1, fourth terminal P4 is connected to the magnetic particle inspection power, second terminal P2, third terminal P3 short circuit, put annular part in the middle of two coil pack, the silicon steel bar inserts from the left hole of box, pass left coil pack and annular part and insert right coil pack, switch on alternating current power supply, utilize the magnetic flux of reversal to induce circumferential electric current on annular part, circumferential electric current induces toroidal magnetic field again, the inspection annular part is inside, the circumference defect of outer wall and terminal surface, this kind of magnetic induction current method, the part does not have direct contact with power supply unit, also do not receive mechanical pressure, avoid part burn and deformation.

Example three:

the first binding post P1 and the fourth binding post P4 are disconnected, the second binding post P2 and the third binding post P3 are connected to a magnetic powder inspection power supply, a conductive chuck is clamped between electrodes, magnetization is carried out by adopting an electrifying method or a central conductor method, and a circumferential magnetic field is generated when the power supply is switched on.

Example four:

the first binding post P1 and the fourth binding post P4 are connected to a magnetic powder inspection power supply, the second binding post P2 and the third binding post P3 are disconnected, conductive accessories or parts are clamped between the electrodes, and when the power supply is switched on, a longitudinal magnetic field and a circumferential magnetic field are generated simultaneously to carry out multidirectional magnetization.

And (3) clamping the conductive supporting plate between the electrodes, placing the part on the longitudinal shallow groove of the insulating supporting plate, simultaneously checking the defects of the surface of the part in all directions by using a longitudinal magnetic field of the coil and a multidirectional magnetic field generated by a circumferential magnetic field generated by the conductive supporting plate, repeating the operation for 3 times after the checking is finished, and rotating the part by 90 degrees every time.

The direct part between electrodes is magnetized by contact to generate multi-directional magnetic field.

Example five:

the first binding post P1 and the third binding post P3 are connected to a magnetic powder inspection power supply, the second binding post P2 and the fourth binding post P4 are connected, an insulating accessory is clamped between electrodes, and two longitudinal magnetic fields in opposite directions are generated.

The utility model provides an accurate part magnetic particle testing device, through rotatory hand wheel 5, drive screw rod 3 at 2 internal rotations of fixed swivel nut, make first coil pack 4 remove about, realize the coarse adjustment of two coil pack relative position, operation second coil pack 8 outwards slides on back shaft 6, make the spring compression reset, the spring that resets exerts the elastic force to second coil pack 8, second coil pack 8 inwards slides on back shaft 6 and presss from both sides clamping article 9, realize the fine setting and the clamp of two coil pack relative position, place the part 14 that needs the detection on putting article 9, to first terminal P1, second terminal P2, third terminal P3, fourth terminal P4 cooperates different power connection combinations, realize different functions, then spray the magnetic to the part, detect;

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A precision part magnetic powder detection device is characterized by comprising a box body (1), a fixed threaded sleeve (2), a screw rod (3), a first coil component (4), a supporting shaft (6), an elastic component (7), a second coil component (8) and an object placing component (9);

a first coil assembly (4) and a second coil assembly (8) are arranged in the box body (1), a screw rod (3) is connected to the first end of the first coil assembly (4), and the screw rod (3) penetrates through the side wall of the first end of the box body (1);

a fixed threaded sleeve (2) is installed in the side wall of the first end of the box body (1), the screw rod (3) is installed in the fixed threaded sleeve (2), and the screw rod (3) penetrates through the fixed threaded sleeve (2);

the side wall of the second end of the box body (1) is connected with a supporting shaft (6), the other end of the supporting shaft (6) is connected with the first end of a second coil assembly (8), the supporting shaft (6) is arranged in the first end of the second coil assembly (8) in a sliding connection mode, an elastic piece (7) is arranged between the first end of the second coil assembly (8) and the side wall of the second end of the box body (1), and the elastic piece (7) is sleeved on the supporting shaft (6);

a detachable object (9) is connected between the second end of the first coil component (4) and the second end of the second coil component (8);

a first wiring terminal (P1), a second wiring terminal (P2), a third wiring terminal (P3) and a fourth wiring terminal (P4) are sequentially arranged on the side wall of the third end of the box body (1); the first terminal (P1) and the second terminal (P2) are electrically connected with the second coil assembly (8) respectively, and the third terminal (P3) and the fourth terminal (P4) are electrically connected with the first coil assembly (4) respectively.

2. The precision part magnetic powder inspection device according to claim 1, wherein the first coil assembly (4) and the second coil assembly (8) each comprise an inner housing (10), a cable assembly (11), an electrode (12), and an outer housing (13); an inner shell (10) is arranged in the outer shell (13), a cable assembly (11) is arranged between the outer shell (13) and the inner shell (10), a first limiting groove is arranged in a first end of the inner shell (10), and an electrode (12) and a second limiting groove are respectively arranged in a second end of the inner shell (10);

the screw (3) and the supporting shaft (6) are respectively arranged in first limiting grooves in the first coil assembly (4) and the second coil assembly (8), the supporting shaft (6) is arranged in the first limiting grooves in a sliding connection mode, and two ends of the object (9) are respectively detachably arranged in second limiting grooves in the first coil assembly (4) and the second coil assembly (8);

the first binding post (P1) and the second binding post (P2) are respectively electrically connected with the cable assembly (11) in the second coil assembly (8), and the third binding post (P3) and the fourth binding post (P4) are respectively electrically connected with the cable assembly (11) in the first coil assembly (4).

3. The precision part magnetic powder inspection device according to claim 2, wherein the cable assembly (11) comprises a coil and a contact head, and the contact head is electrically connected with the first terminal post (P1), the second terminal post (P2), the third terminal post (P3) and the fourth terminal post (P4) respectively.

4. The precision part magnetic powder testing device according to claim 1, wherein a rolling bearing is arranged in the first limiting groove in the first coil component (4), and the screw (3) is installed in the rolling bearing.

5. The precision part magnetic powder testing device according to claim 1, wherein a rotating hand wheel (5) is connected outside the screw rod (3).

6. The magnetic powder inspection device for precision parts according to claim 1, wherein the placing member (9) is an insulating support plate or an insulating chuck or a silicon steel rod or a conductive support plate or a conductive chuck.

7. The magnetic powder testing device for precision parts according to claim 2, wherein a heat dissipation fan is provided on the housing (13).