CN111624535A

CN111624535A - Magnetic conductivity test fixture and test method thereof

Info

Publication number: CN111624535A
Application number: CN202010624115.3A
Authority: CN
Inventors: 张凯; 陈龙; 许兵兵; 杨树成; 王启龙
Original assignee: Huaian Jiedingtang Technology Co ltd
Current assignee: Huaian Jiedingtang Technology Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2020-09-04

Abstract

The invention provides a magnetic conductivity test fixture and a test method thereof, relating to the technical field of devices or instruments for measuring magnetic variables, wherein the magnetic conductivity test fixture comprises a main body frame, a feeding mechanism, a test mechanism and a dotting mechanism; the feeding mechanism comprises a material carrying plate and a Y-direction driving module; the test mechanism comprises a weak magnetic meter, a first X-direction module and a first Z-direction module, the first X-direction module can drive the weak magnetic meter to move along the X direction, and the first Z-direction module can drive the weak magnetic meter to move along the Z direction; the dotting mechanism comprises a dotting pen, a second X direction module and a second Z direction module, the second X direction module can drive the dotting pen to move along the X direction, and the second Z direction module can drive the dotting pen to move along the Z direction. The technical problems that a single fixture in the prior art is used for testing and dotting a single product, and the testing and dotting efficiency is low are solved.

Description

Magnetic conductivity test fixture and test method thereof

Technical Field

The invention relates to the technical field of devices or instruments for measuring magnetic variables, in particular to a magnetic conductivity test fixture and a test method thereof.

Background

When an FPC (Flexible Printed circuit) is produced, a steel sheet on the FPC Flexible board generates weak magnetic permeability, and when the magnetic permeability reaches a certain value, the function of the Flexible circuit board is affected.

In order to ensure that the magnetic permeability of the component does not negatively affect the function of the finished device, or that the magnetic permeability of the component is within a range that has a small negative effect on the function of the finished device, the magnetic permeability of the component is usually detected in advance mainly by using a weak magnetic meter.

In general technology, one or more connector steel sheets on the FPC soft board are used, when magnetic conductivity is tested, a single fixture is used for testing and dotting corresponding to a single product, and testing and dotting efficiency is low.

Disclosure of Invention

The invention aims to provide a magnetic conductivity test fixture and a test method thereof, so as to solve the technical problems that in the prior art, a single fixture is used for testing and dotting a single product, and the testing and dotting efficiency is low.

In a first aspect, an embodiment of the present invention provides a magnetic permeability test fixture, including: the device comprises a main body frame, a feeding mechanism, a testing mechanism and a dotting mechanism, wherein the feeding mechanism, the testing mechanism and the dotting mechanism are all arranged on the main body frame;

the feeding mechanism comprises a material carrying plate for placing a product to be tested and a Y-direction driving module for driving the material carrying plate to move along the Y direction;

the test mechanism comprises a weak magnetic meter, a first X-direction module and a first Z-direction module, the first X-direction module can drive the weak magnetic meter to move to the position above the position to be tested along the X direction, and the first Z-direction module can drive the weak magnetic meter to move to be close to or far away from the position to be tested along the Z direction;

the dotting mechanism comprises a dotting pen, a second X-direction module and a second Z-direction module, the second X-direction module can drive the dotting pen to move to the position above the dotting position of the product to be detected along the X direction, and the second Z-direction module can drive the dotting pen to move along the Z direction to be close to or far away from the dotting position;

the weak magnetic meter and the dotting pen are arranged along the Y direction.

Furthermore, the main body frame comprises an accommodating space with a front opening, the feeding mechanism, the testing mechanism and the dotting mechanism are all arranged in the accommodating space, and a product to be tested can be fed into the material carrying plate through the front opening;

the magnetic conductivity test fixture further comprises an electric cabinet, and the electric cabinet is fixedly connected to the outer side of the main body frame; the feeding mechanism, the testing mechanism and the dotting mechanism are all electrically connected with the electric cabinet.

Furthermore, the output end of the Y-direction driving module is fixedly connected with a movable carrier plate and a lower die fixing plate, and the movable carrier plate and the lower die fixing plate are arranged at intervals along the Z direction;

and the movable carrier plate is provided with a jacking driving part, and the output end of the jacking driving part penetrates through the lower die fixing plate and is fixedly connected with the material carrying plate, so that the material carrying plate is abutted to or separated from the upper surface of the lower die fixing plate.

Furthermore, the Y-direction driving module adopts a Y-direction electric cylinder;

the movable carrier plate is fixedly connected to the output end of the Y-direction electric cylinder;

an upright post is connected between the movable carrier plate and the lower die fixing plate and used for enabling an interval to be reserved between the movable carrier plate and the lower die fixing plate.

Furthermore, a positioning structure is arranged between the material carrying plate and the lower die fixing plate;

the positioning structure comprises a positioning hole arranged on the material carrying plate and a positioning pin arranged on the lower die fixing plate and matched with the positioning hole; or the positioning structure comprises a positioning pin arranged on the material loading plate and a positioning hole arranged on the lower die fixing plate and matched with the positioning pin.

Further, the first Z-direction module is fixedly connected to the output end of the first X-direction module;

the test mechanism further comprises a test fixing plate and an optical fiber amplifier, and the test fixing plate is fixedly connected to the output end of the first Z-direction module;

the optical fiber amplifier and the weak magnetic meter are both arranged on the test fixing plate, and the optical fiber amplifier is configured to collect and send the movement information of the permanent magnet rod of the weak magnetic meter.

Further, the first X-direction module comprises a first X-direction electric cylinder, and the first X-direction electric cylinder is mounted on the main body frame;

the first Z-direction module comprises a first Z-direction electric cylinder, and the first Z-direction electric cylinder is fixedly connected to the output end of the first X-direction electric cylinder;

the optical fiber amplifier is installed on the upper surface of the test fixing plate, the weak magnetic meter is fixedly installed on the lower surface of the test fixing plate, and a probe of the weak magnetic meter faces the material carrying plate.

Further, the second Z-direction module is fixedly connected to the output end of the second X-direction module;

the dotting mechanism further comprises a pen seat, the pen seat is fixedly arranged on the bottom plate of the main body frame, and the dotting pen can be driven by the second Z-direction module and the second X-direction module to be inserted into the pen seat in a non-use state.

Further, the pen holder comprises a body, a sealing ring and a gland;

the body has an upper opening;

the gland is provided with an avoiding hole, and the gland presses the sealing ring to cover the upper opening.

Has the advantages that:

according to the magnetic conductivity test fixture provided by the invention, the material carrying plate can move along the Y direction under the drive of the Y direction drive module, and the weak magnetic meter can move along the X direction and the Z direction under the drive of the first X direction module and the first Z direction module respectively, so that in the test stage, the weak magnetic meter can move to the position to be tested through the cooperation of the Y direction drive module, the first X direction module and the first Z direction module, and further move towards the direction close to the position to be tested so as to prepare for the test; to the product that awaits measuring that needs were dotted, because weak magnetic meter and the pen of dotting set up along Y to, therefore, can send the product of waiting to be dotted to the position department that the pen of dotting corresponds through Y to drive module to through the cooperation of second X to module and second Z to the module, can make the pen of dotting move to the top of the position of dotting of the product that awaits measuring, and then to the direction motion that is close to the position of dotting, for the preparation of preparing of dotting, after waiting to dot to accomplish, can make the pen of dotting move to the direction of keeping away from the position of dotting.

According to the foregoing, the weak magnetic meter and the product to be tested can be adjusted at multiple positions in three directions by matching the Y-direction driving module, the first X-direction module and the first Z-direction module, so that the test operation of multiple uncut products can be realized; similarly, the dotting pen and the product to be tested can be adjusted at multiple positions in three directions by matching with the Y-direction driving module, the second X-direction module and the second Z-direction module, so that dotting operation on a plurality of uncut products can be realized; in the testing and dotting processes, the product to be tested does not need to be repeatedly put in and taken out, so that the testing time is saved, and the testing efficiency is improved.

In a second aspect, an embodiment of the present invention provides a testing method using the foregoing magnetic permeability testing fixture, including the following steps:

conveying a product to be tested along the Y direction;

moving the weak magnetic meter along the X direction and the Z direction respectively to enable a probe of the weak magnetic meter to be abutted against a steel sheet to be tested of a product to be tested, and testing the steel sheet to be tested;

if the steel sheet to be tested is qualified, moving the weak magnetic meter along the Z direction to separate the weak magnetic meter from the steel sheet to be tested, and outputting a product to be tested along the Y direction;

and if the steel sheet to be tested is unqualified, the weak magnetic meter is moved along the Z direction to be separated from the steel sheet to be tested, the product to be tested is conveyed to the dotting mechanism along the Y direction, the dotting pens are moved along the X direction and the Z direction respectively, and the product to be tested is dotted and marked.

The technical advantages and effects achieved by the testing method of the magnetic conductivity testing jig provided by the invention are the same as those achieved by the magnetic conductivity testing jig, and are not repeated herein.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a magnetic conductivity test fixture according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a magnetic permeability test fixture according to an embodiment of the present invention, in which a partial structure of a main body frame and an electric cabinet are not shown;

fig. 3 is a schematic structural diagram of a feeding mechanism in a magnetic permeability testing fixture according to an embodiment of the present invention;

fig. 4 is a second schematic structural diagram of a feeding mechanism in a magnetic permeability testing fixture according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a testing mechanism in a magnetic permeability testing fixture according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a dotting mechanism in a magnetic permeability test fixture according to an embodiment of the present invention;

fig. 7 is a second schematic structural diagram of a dotting mechanism in the magnetic permeability test fixture according to the embodiment of the present invention, wherein a second trace tank chain is not shown;

fig. 8 is a partially enlarged view of a portion a shown in fig. 2.

Icon:

100-a body frame;

200-a feeding mechanism; 210-a material carrying plate; 220-moving the carrier plate; 230-lower die fixing plate; 240-Y direction electric cylinder; 250-upright column;

300-a testing mechanism; 310-a weak magnetometer; 320-testing the fixing plate; 330-fiber amplifier; 340-a first X-direction electric cylinder; 350-a first Z-direction electric cylinder; 360-a first walking tank chain;

400-dotting mechanism; 410-a dotting pen; 420-a second X-direction electric cylinder; 430-second Z-direction electric cylinder; 440-dotting the fixed plate; 450-dotting the connecting plate; 460-a second walking tank chain; 470-pen stand;

500-electric cabinet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

As shown in fig. 1 to 6, the magnetic permeability test fixture includes a main frame 100, a feeding mechanism 200, a testing mechanism 300, and a dotting mechanism 400, all of which are mounted on the main frame 100; the feeding mechanism 200 comprises a material carrying plate 210 for placing a product to be tested and a Y-direction driving module for driving the material carrying plate 210 to move along the Y direction; the test mechanism comprises a weak magnetic meter 310, a first X-direction module and a first Z-direction module, the first X-direction module can drive the weak magnetic meter 310 to move to the position to be tested along the X direction, and the first Z-direction module can drive the weak magnetic meter 310 to move to be close to or far away from the position to be tested along the Z direction; the dotting mechanism comprises a dotting pen 410, a second X-direction module and a second Z-direction module, the second X-direction module can drive the dotting pen 410 to move to the position above the dotting position of the product to be detected along the X direction, and the second Z-direction module can drive the dotting pen 410 to move along the Z direction to be close to or far away from the dotting position; the weak magnetic gauge 310 and the pointing pen 410 are disposed in the Y direction.

In the magnetic permeability test fixture provided by this embodiment, the material loading plate 210 can move in the Y direction under the drive of the Y direction drive module, and the weak magnetic meter 310 can move in the X direction and the Z direction respectively under the drive of the first X direction module and the first Z direction module, so that in the test stage, the weak magnetic meter 310 can move to the upper side of the position to be tested through the cooperation of the three (the Y direction drive module, the first X direction module and the first Z direction module) and further move in the direction close to the position to be tested, so as to prepare for the test, and after the test is completed, the weak magnetic meter 310 can move in the direction far from the position to be tested; for the product to be tested that needs to be dotted, weak magnetic meter 310 and dotting pen 410 are arranged along the Y direction, so the product to be dotted can be sent to the position corresponding to dotting pen 410 through the Y direction driving module, and through the cooperation of the second X direction module and the second Z direction module, dotting pen 410 can be moved to the top of the dotting position of the product to be tested, and then moved to the direction close to the dotting position, so that preparation is prepared for dotting, and after the dotting is completed, the dotting pen can be moved to the direction far away from the dotting position.

As can be seen from the foregoing, the weak magnetic meter 310 and the product to be tested can be adjusted at multiple positions in three directions by matching with the Y-direction driving module, the first X-direction module and the first Z-direction module, so that the test operation on multiple uncut products can be realized; similarly, the dotting pen 410 and the product to be tested can be adjusted at multiple positions in three directions by matching with the Y-direction driving module, the second X-direction module and the second Z-direction module, so that dotting operation on multiple uncut products can be realized; in the testing and dotting processes, the product to be tested does not need to be repeatedly put in and taken out, so that the testing time is saved, and the testing efficiency is improved.

As shown in fig. 1, the main body frame 100 includes an accommodating space with a front opening, the feeding mechanism 200, the testing mechanism 300 and the dotting mechanism 400 are all installed in the accommodating space, and a product to be tested can be fed into the material carrying plate 210 through the front opening; the magnetic conductivity test fixture further comprises an electric cabinet 500, and the electric cabinet 500 is fixedly connected to the outer side of the main body frame 100; the feeding mechanism 200, the testing mechanism 300 and the dotting mechanism 400 are all electrically connected with the electric cabinet 500.

It should be noted that the operation of controlling the feeding mechanism 200, the testing mechanism 300, and the dotting mechanism 400 by using the electric cabinet 500 is clear to those skilled in the art, and detailed description thereof is omitted here.

In this embodiment, as shown in fig. 3 and 4, the output end of the Y-direction driving module is fixedly connected with a movable carrier plate 220 and a lower mold fixing plate 230, and the movable carrier plate 220 and the lower mold fixing plate 230 are arranged at intervals along the Z-direction; the movable carrier plate 220 is provided with a jacking driving element (not shown in the drawings), and an output end of the jacking driving element penetrates through the lower mold fixing plate 230 and is fixedly connected with the material carrying plate 210, so that the material carrying plate 210 is abutted to or separated from the upper surface of the lower mold fixing plate 230.

Specifically, the jacking driving member may be an air cylinder or an electric cylinder. After the test or the dotting is finished, the material loading plate 210 is driven to ascend through the jacking driving piece, so that the material loading plate 210 is separated from the upper surface of the lower die fixing plate 230, and the unloading can be facilitated; after the discharging is completed, the driving element may drive the material loading plate 210 to descend, and the material loading plate 210 may abut against the upper surface of the lower mold fixing plate 230, so as to prepare for discharging.

In this embodiment, as shown in fig. 4, the Y-direction driving module employs a Y-direction electric cylinder 240; the movable carrier plate 220 is fixedly connected to the output end of the Y-direction electric cylinder 240; a column 250 is connected between the movable carrier plate 220 and the lower mold fixing plate 230 to provide a space therebetween.

Further, a positioning structure (not shown) is disposed between the material loading plate 210 and the lower die fixing plate 230; the positioning structure includes positioning holes provided on the material-carrying plate 210 and positioning pins provided on the lower mold fixing plate 230 to be matched with the positioning holes; alternatively, the positioning structure includes positioning pins provided on the material-carrying plate 210 and positioning holes provided on the lower mold fixing plate 230 to be engaged with the positioning pins.

Through the arrangement of the positioning structure, a certain guiding effect can be achieved on the ascending and descending movement of the material carrying plate 210, so that the material carrying plate 210 cannot be displaced in the horizontal direction relative to the lower die fixing plate 230.

The specific structure of the feeding mechanism 200 has been described above, and the specific structure of the testing mechanism 300 is described next.

As shown in fig. 5, the first Z-direction module is fixedly connected to the output end of the first X-direction module; the testing mechanism 300 further includes a testing fixing plate 320 and an optical fiber amplifier 330, wherein the testing fixing plate 320 is fixedly connected to the output end of the first Z-direction module; the optical fiber amplifier 330 and the weak magnetic meter 310 are both mounted on the test fixing plate, and the optical fiber amplifier 330 is configured to collect and transmit movement information of the permanent magnet bar of the weak magnetic meter 310.

Specifically, with reference to fig. 5, the first X-direction module includes a first X-direction electric cylinder 340, and the first X-direction electric cylinder 340 is installed on the main body frame 100; the first Z-direction module comprises a first Z-direction electric cylinder 350, and the first Z-direction electric cylinder 350 is fixedly connected to the output end of the first X-direction electric cylinder 340; the optical fiber amplifier 330 is mounted on the upper surface of the test fixing plate 320, the weak magnetic meter 310 is fixedly mounted on the lower surface of the test fixing plate 320, and the probe of the weak magnetic meter 310 is disposed toward the material carrying plate 210.

Optionally, connecting lines among components included in the testing mechanism 300 are distributed through the first routing tank chain 360; wherein, first line tank chain 360 of walking is hollow structure. So set up, not only make the wiring neatly more, not mixed and disorderly, can not make easily moreover and take place winding, knot etc. between many connecting wires.

Having described the specific structure of the testing mechanism 300, the specific structure of the dotting mechanism 400 is described next.

As shown in fig. 6 and 7, the second Z-direction module is fixedly connected to the output end of the second X-direction module, the second X-direction module includes a second X-direction electric cylinder 420, and the second Z-direction module includes a second Z-direction electric cylinder 430.

Specifically, the dotting mechanism 400 further includes a dotting fixing plate 440, and the dotting fixing plate 440 is fixedly connected to the output end of the second X-direction electric cylinder 420; the second Z-direction electric cylinder 430 is fixedly connected to the dotting fixing plate 440, wherein the dotting pen 410 is fixedly connected to the output end of the second Z-direction electric cylinder 430 through the dotting connecting plate 450, and the dotting pen 410 is slidably connected to the dotting fixing plate 440.

Illustratively, the dotting fixing plate 440 is provided with a slide rail (not shown in the drawings), and the dotting pen 410 is slidably connected to the slide rail.

As shown in fig. 7, in operation, the second Z-direction electric cylinder 430 extends to drive the dotting connecting plate 450 to move downwards, and simultaneously drive the dotting pen 410 to move downwards along the sliding rail; otherwise, the pointing pen 410 is driven to move upward along the slide rail.

Optionally, the connecting lines between the components included in the dotting mechanism 400 are routed through the second tracking tank chain 460, specifically the first tracking tank chain 360, and are not described herein again.

As shown in fig. 8, the dotting mechanism 400 further includes a pen holder 470, the pen holder 470 is fixedly disposed on the bottom plate of the main body frame 100, and the dotting pen 410 can be inserted into the pen holder 470 in a non-use state (i.e., in a state of not dotting) by being driven by the second X-direction electric cylinder 420 and the second Z-direction electric cylinder 430.

In one embodiment of the present application, the pen holder 470 includes a body, a sealing ring, and a gland; the body is provided with an upper opening; the gland is provided with an avoiding hole, and the gland presses the sealing ring to cover the upper opening. When the dotting pen 410 is not in standby use, the pen point of the dotting pen 410 is inserted into the pen holder 470 and sealed by the sealing ring, so that the influence of the water loss of the pen point on the marking can be prevented.

The embodiment also provides a testing method applying the magnetic conductivity testing jig, which comprises the following steps:

conveying a product to be tested along the Y direction;

moving the weak magnetic meter 310 along the X direction and the Z direction respectively to enable a probe of the weak magnetic meter 310 to be abutted against a steel sheet to be tested of a product to be tested, and testing the steel sheet to be tested;

if the steel sheet to be tested is qualified, moving the weak magnetic meter 310 along the Z direction to separate the steel sheet from the steel sheet to be tested, and outputting a product to be tested along the Y direction;

if the steel sheet to be tested is unqualified, the weak magnetic meter 310 is moved along the Z direction to be separated from the steel sheet to be tested, the product to be tested is conveyed to the dotting mechanism 400 along the Y direction, the dotting pen 410 is moved along the X direction and the Z direction respectively, and the product to be tested is dotted and marked.

The magnetic conductivity test fixture of the embodiment has the test principle that: the steel sheet on the FPC soft board can generate weak magnetic conductivity, and the magnetic conductivity reaching a certain value can have certain influence on the function of the soft board. The invention relates to a jig for accurately judging whether the magnetic conductivity of a steel sheet on an FPC soft board reaches the degree of influencing the use of the FPC soft board. Irradiating the optical fiber amplifier 330 to the non-testing end of the permanent magnet rod, then arranging the weak magnet meter 310 and the FPC soft board steel sheet to be tested at a close distance, if the magnetic conductivity of the FPC soft board steel sheet to be tested is larger than that of a weak magnet meter standard sample, the permanent magnet rod of the weak magnet meter 310 inclines towards the FPC soft board steel sheet to be tested, the numerical value of the optical fiber amplifier 330 changes, a signal is sent out, and the system judges that the product is unqualified; otherwise, the product is judged to be qualified.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic conductivity test fixture is characterized by comprising: the device comprises a main body frame (100), a feeding mechanism (200), a testing mechanism (300) and a dotting mechanism (400), wherein the feeding mechanism, the testing mechanism and the dotting mechanism are all arranged on the main body frame (100);

the feeding mechanism (200) comprises a material loading plate (210) for placing a product to be tested and a Y-direction driving module for driving the material loading plate (210) to move along the Y direction;

the test mechanism (300) comprises a weak magnetic meter (310), a first X-direction module and a first Z-direction module, wherein the first X-direction module can drive the weak magnetic meter (310) to move to the position to be tested along the X direction, and the first Z-direction module can drive the weak magnetic meter (310) to move to be close to or far away from the position to be tested along the Z direction;

the dotting mechanism (400) comprises a dotting pen (410), a second X-direction module and a second Z-direction module, the second X-direction module can drive the dotting pen (410) to move to the position above the dotting position of a product to be detected along the X direction, and the second Z-direction module can drive the dotting pen (410) to move along the Z direction to be close to or far away from the dotting position;

the weak magnetic meter (310) and the pointing pen (410) are arranged along the Y direction.

2. The magnetic permeability test fixture according to claim 1, wherein the main body frame (100) includes an accommodating space with a front opening, the feeding mechanism (200), the testing mechanism (300) and the dotting mechanism (400) are all installed in the accommodating space, and a product to be tested can be fed into the material carrying plate (210) through the front opening;

the magnetic conductivity test fixture further comprises an electric cabinet (500), and the electric cabinet (500) is fixedly connected to the outer side of the main body frame (100); the feeding mechanism (200), the testing mechanism (300) and the dotting mechanism (400) are electrically connected with the electric cabinet (500).

3. The magnetic permeability test fixture according to claim 1 or 2, wherein a movable carrier plate (220) and a lower die fixing plate (230) are fixedly connected to an output end of the Y-direction driving module, and the movable carrier plate (220) and the lower die fixing plate (230) are arranged at intervals along the Z-direction;

the movable carrier plate (220) is provided with a jacking driving piece, and an output end of the jacking driving piece penetrates through the lower die fixing plate (230) and is fixedly connected with the material carrying plate (210) so as to enable the material carrying plate (210) to be abutted against or separated from the upper surface of the lower die fixing plate (230).

4. The magnetic permeability test fixture of claim 3, wherein the Y-direction driving module adopts a Y-direction electric cylinder (240);

the movable carrier plate (220) is fixedly connected to the output end of the Y-direction electric cylinder (240);

an upright (250) is connected between the movable carrier plate (220) and the lower die fixing plate (230) for providing a space therebetween.

5. The magnetic permeability test fixture according to claim 3, wherein a positioning structure is arranged between the material carrying plate (210) and the lower die fixing plate (230);

the positioning structure comprises positioning holes arranged on the material carrying plate (210) and positioning pins arranged on the lower die fixing plate (230) and matched with the positioning holes; or the positioning structure comprises positioning pins arranged on the material carrying plate (210) and positioning holes arranged on the lower die fixing plate (230) and matched with the positioning pins.

6. The magnetic permeability test fixture of claim 1 or 2, wherein the first Z-direction module is fixedly connected to the output end of the first X-direction module;

the testing mechanism (300) further comprises a testing fixing plate (320) and an optical fiber amplifier (330), wherein the testing fixing plate (320) is fixedly connected to the output end of the first Z-direction module;

the optical fiber amplifier (330) and the weak magnetic meter (310) are both mounted on the test fixing plate (320), and the optical fiber amplifier (330) is configured to collect and transmit movement information of a permanent magnet rod of the weak magnetic meter (310).

7. The magnetic permeability test fixture of claim 6, wherein the first X-direction module comprises a first X-direction electric cylinder (340), and the first X-direction electric cylinder (340) is mounted on the main body frame (100);

the first Z-direction module comprises a first Z-direction electric cylinder (350), and the first Z-direction electric cylinder (350) is fixedly connected to the output end of the first X-direction electric cylinder (340);

the optical fiber amplifier (330) is mounted on the upper surface of the test fixing plate (320), the weak magnetic meter (310) is fixedly mounted on the lower surface of the test fixing plate (320), and a probe of the weak magnetic meter (310) faces the material carrying plate (210).

8. The magnetic permeability test fixture of claim 1 or 2, wherein the second Z-direction module is fixedly connected to the output end of the second X-direction module;

the dotting mechanism (400) further comprises a pen holder (470), the pen holder (470) is fixedly arranged on the bottom plate of the main body frame (100), and the dotting pen (410) can be inserted into the pen holder (470) in a non-use state under the driving of the second Z-direction module and the second X-direction module.

9. The magnetic permeability test fixture of claim 8, wherein the pen holder (470) comprises a body, a sealing ring and a gland;

the body has an upper opening;

10. A method for testing magnetic permeability of the magnetic permeability test fixture of any one of claims 1-9, comprising the following steps:

conveying a product to be tested along the Y direction;

moving the weak magnetic meter (310) along the X direction and the Z direction respectively to enable a probe of the weak magnetic meter (310) to be abutted against a steel sheet to be tested of a product to be tested, and testing the steel sheet to be tested;

if the steel sheet to be tested is qualified, moving the weak magnetic meter (310) along the Z direction to separate the weak magnetic meter from the steel sheet to be tested, and outputting a product to be tested along the Y direction;

if the steel sheet to be tested is unqualified, the weak magnetic meter (310) is moved along the Z direction to be separated from the steel sheet to be tested, the product to be tested is conveyed to the dotting mechanism (400) along the Y direction, the dotting pen (410) is moved along the X direction and the Z direction respectively, and dotting marking is carried out on the product to be tested.