CN112362213B - Magnet drawing force testing device - Google Patents
Magnet drawing force testing device Download PDFInfo
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- CN112362213B CN112362213B CN202011432117.9A CN202011432117A CN112362213B CN 112362213 B CN112362213 B CN 112362213B CN 202011432117 A CN202011432117 A CN 202011432117A CN 112362213 B CN112362213 B CN 112362213B
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- magnet
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- rotating shaft
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0028—Force sensors associated with force applying means
- G01L5/0033—Force sensors associated with force applying means applying a pulling force
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- General Physics & Mathematics (AREA)
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Abstract
The invention relates to the field of TWS terminal test, and discloses a magnet drawing force testing device, which comprises: the steering mechanism comprises a rotating shaft, and the rotating shaft can rotate around the axis of the rotating shaft; the base is in transmission connection with the rotating shaft and comprises a working surface for placing a piece to be tested; the locking assembly is arranged on the base and used for fixing the piece to be detected on the working surface; the magnet is used for being magnetically connected with the piece to be detected; the pull rod, the pull rod and the magnet are of an integrated structure. In the magnet drawing force testing device, the base is in transmission connection with the rotating shaft of the steering mechanism, so that a to-be-tested piece fixed on the base can rotate 360 degrees according to the actual required angle, and the stress direction of the to-be-tested piece and the to-be-tested piece are kept in a vertical optimal testing state in the testing process; magnet and test pull rod design formula structure as an organic whole, avoid in the past because of magnet and pulling force piece separately design lead to the condition that pulling force piece and magnet come unstuck appearing in the test procedure.
Description
Technical Field
The invention relates to the technical field of TWS terminal testing, in particular to a magnet drawing force testing device.
Background
In the existing TWS industry, 2 test methods exist at present in the magnet drawing force test:
the first method comprises the following steps: the mode of gluing on magnet and adding the pulling force piece is done the drawing force test, and this kind of scheme can lead to 2 problems to appear: 1. glue is dispensed on the surface of the magnet, and the glue easily permeates into the circumferential gap between the magnet and the piece to be tested from the surface, so that the test data is inaccurate; 2. after the glue is dispensed on the surface of the magnet, the tension block is added, so that the situation that the tension block and the magnet are degummed under the condition that the tension of the magnet is not measured can occur, and the test fails;
and the second method comprises the following steps: punch at a point of awaiting measuring a point glue face bottom, await measuring a point with magnet point after, test magnet and awaiting measuring the adhesion between the piece with the form that thrust conversion is the drawing force, this kind of scheme can lead to 2 problems to appear: 1. punching a hole on the piece to be tested, so that the effective dispensing area between the piece to be tested and the magnet is damaged, and the drawing force test result is influenced; 2. the part to be tested and the magnet are stressed in a point-like manner during the drawing force measurement, and the stress direction and the actual test direction cannot keep the vertical direction, so that the drawing force test result is influenced.
Therefore, how to solve the problem of inaccurate drawing force test is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention discloses a magnet drawing force testing device which is used for relieving the problems of long waiting time of drawing force testing and inaccurate drawing force testing.
In order to achieve the purpose, the invention provides the following technical scheme:
a magnet drawing force testing device, comprising:
the steering mechanism comprises a rotating shaft, and the rotating shaft can rotate around the axis of the rotating shaft;
the base is in transmission connection with the rotating shaft and comprises a working surface for placing a piece to be tested;
the locking assembly is arranged on the base and used for fixing the piece to be detected on the working surface;
the magnet is used for being magnetically connected with the piece to be detected;
the pull rod and the magnet are of an integrated structure.
In the magnet drawing force testing device, the base for fixing the piece to be tested is in transmission connection with the rotating shaft of the steering mechanism, so that the base can rotate around the axis of the rotating shaft under the driving of the steering mechanism, for example, the piece to be tested fixed on the base can rotate 360 degrees according to the actual required angle, and the stress direction of the piece to be tested and the piece to be tested are kept in a vertical optimal testing state in the testing process; specifically, the piece to be tested is fixed on the working face of the base by the locking assembly on the base, and the magnet and the test pull rod which are connected with the piece to be tested in a magnetic mode are designed into an integrated structure, so that the condition that the tensile block and the magnet are degummed in the test process due to the fact that the magnet and the tensile block are designed separately in the past is avoided. Through the comprehensive structural design, the problem that the drawing force test is long in waiting time and inaccurate can be solved, and effective guarantee is provided for quality control of the subsequent quantity of the workpiece to be tested.
Optionally, the pull rod is welded to the magnet.
Optionally, the steering mechanism comprises a servo motor.
Optionally, the locking assembly comprises a pressure plate and a locking member; the retaining member penetrates through the pressing plate and is connected with the base.
Optionally, the retaining member is a bolt.
Optionally, the locking assembly further includes a limiting member, the limiting member is mounted on the base, and is located on one side of the pressing plate facing the base, and is used for limiting a limit position between the pressing plate and the working surface.
Optionally, the stopper and the base are of an integral structure.
Optionally, the number of locking assemblies is two.
Optionally, the magnet drawing force testing device further comprises a force measuring assembly, wherein the force measuring assembly is connected with the pull rod and used for measuring the acting force between the magnet and the piece to be tested.
Optionally, the force-measuring assembly comprises a force-measuring device.
Drawings
Fig. 1 is a schematic structural diagram of a magnet drawing force testing apparatus according to an embodiment of the present invention;
fig. 2 is a sectional view taken along line a-a of fig. 1.
Icon: 1-a steering mechanism; 2-a base; 3-a locking assembly; 4-a magnet; 5-a pull rod; 6-a force measuring assembly; 7-a piece to be detected; 11-a rotating shaft; 21-a working surface; 31-a platen; 32-a locking member; 33-a stop; 51-pull ring.
Detailed Description
The TWS structure design generally designs a scheme of dispensing a magnet and a piece to be measured, namely the piece to be measured, and the corresponding piece to be measured structure plays a good role in positioning and protecting TWS charging and protection; the piece to be measured and the magnet can be well fixed together only by being bonded by glue. The previous drawing force test scheme is as follows: the mode of gluing on magnet and adding the pulling force piece is done the drawing force test, and this kind of scheme can lead to 2 problems to appear: 1. glue is dispensed on the surface of the magnet, and the glue easily permeates into the circumferential gap between the magnet and the piece to be tested from the surface, so that the test data is inaccurate; 2. the magnet surface is glued the back and is added the pulling force piece, can appear under the condition that the magnet pulling force was not measured, the condition that pulling force piece and magnet come unstuck leads to the test failure. The design principle of the embodiment of the invention is that the base is fixed on the steering mechanism, the piece to be tested can rotate 360 degrees on the base according to the actual requirement, so that the stress direction of the piece to be tested and the piece to be tested are kept in a vertical optimal test state in the test process, the magnet and the test pull block are designed into a whole, and the condition that the pull block and the magnet are degummed in the test process due to the separate design of the magnet and the pull block in the prior art is avoided.
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
As shown in fig. 1 to 2, an embodiment of the present invention provides a device for testing a drawing force of a magnet 4, including:
the steering mechanism 1, the steering mechanism 1 includes the spindle 11, the spindle 11 can rotate around its axis;
the base 2 is in transmission connection with the rotating shaft 11, and the base 2 comprises a working surface 21 for placing the piece to be detected 7;
the locking assembly 3 is arranged on the base 2, and the locking assembly 3 is used for fixing the piece to be detected 7 on the working surface 21;
a magnet 4 for magnetically connecting with a member to be measured 7;
the pull rod 5, the pull rod 5 and the magnet 4 are of an integrated structure.
In the magnet 4 drawing force testing device, the base 2 for fixing the piece to be tested 7 is in transmission connection with the rotating shaft 11 of the steering mechanism 1, so that the base 2 can rotate around the axis of the rotating shaft 11 under the driving of the steering mechanism 1, for example, the piece to be tested 7 fixed on the base 2 can rotate 360 degrees according to actual required angles, so as to ensure that the stress direction of the piece to be tested 7 and the piece to be tested 7 are kept in a vertical optimal testing state in the testing process; specifically, the piece to be tested 7 is fixed on the working surface 21 of the base 2 through the locking component 3 on the base 2, the magnet 4 magnetically connected with the piece to be tested 7 and the test pull rod 5 are designed into an integrated structure, and the situation that the tensile block and the magnet 4 are degummed in the test process due to the fact that the magnet 4 and the tensile block are separately designed in the prior art is avoided. Through the comprehensive structural design, the problem that the drawing force test is long in waiting time and inaccurate can be solved, and effective guarantee is provided for quality control of the subsequent quantity of the to-be-tested piece 7.
Optionally, the pull rod 5 is welded to the magnet 4.
In a possible way, the pull rod 5 and the magnet 4 are welded into a one-piece structure. Compare cast integral type structure, the welding can more adapt to the different condition of magnet 4 and pull rod 5 material, and easy operation.
It should be noted that, alternatively, the steering mechanism 1 includes a servo motor. The servo motor can control the speed and position accuracy accurately, and can convert the voltage signal into torque and rotating speed to drive a control object. The servo motor has rotor speed controlled by the input signal and fast response, and may be used as the executing element in automatic control system, and has the features of small electromechanical time constant, high linearity, etc. the servo motor can convert the received electric signal into angular displacement or angular speed of the motor shaft for output.
Optionally, the locking assembly 3 comprises a pressure plate 31 and a locking member 32; the locking member 32 is coupled to the base 2 through the pressing plate 31.
It should be noted that the main function of the locking member 32 is to fix the device under test 7 on the working surface 21 of the base 2 through the pressing plate 31, and thus any structure capable of achieving the above function can be referred to as the locking member 32 according to the embodiment of the present invention, such as a clip or a bolt. As shown in fig. 1 and 2, the locking member 32 is a bolt, and the base 2 is provided with a threaded hole for engaging with the bolt.
In order to prevent the excessive acting force of the locking assembly 3 from damaging the to-be-tested part 7, the locking assembly 3 further comprises a limiting part 33, and the limiting part 33 is installed on the base 2 and located on one side of the pressing plate 31 facing the base 2, and is used for limiting the limiting position between the pressing plate 31 and the working surface 21.
Referring to fig. 1, the bolt is located in the middle of the pressing plate 31, and the to-be-tested piece 7 and the limiting piece 33 are located on two sides of the bolt respectively. The height of the limiting piece 33 protruding out of the working surface 21 is matched with the piece to be measured 7. As the bolt is tightened, the pressure plate 31 moves toward the working surface 21, and finally, the pressure plate 31 side abuts against the stopper 33, and at this time, the tightening of the bolt is stopped. Therefore, the locking assembly 3 can prevent the object 7 from being crushed by the pressing plate 31 while fixing the object 7.
Optionally, the limiting member 33 is integrated with the base 2. A protrusion is formed on the base 2 as a stopper 33 to be engaged with the pressing plate 31.
Optionally, there are two locking assemblies 3. Two locking assemblies 3 are used for fixing two ends of the piece to be measured 7.
Optionally, the magnet 4 pulling force testing device further comprises a force measuring assembly 6, and the force measuring assembly 6 is connected with the pull rod 5 and is used for measuring the acting force between the magnet 4 and the piece to be tested 7.
The force measuring unit 6 may be a pressure sensor or a force measuring device.
Optionally, the force-measuring assembly 6 comprises a force-measuring device.
Referring to fig. 1, a pull ring 51 is arranged at one end of the pull rod 5, which is far away from the magnet 4, and a pull hook of the dynamometer is matched with the pull ring 51 to complete the pull-out force test. The test result can be read by the dynamometer.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A magnet drawing force testing device is characterized by comprising:
the steering mechanism comprises a rotating shaft, and the rotating shaft can rotate around the axis of the rotating shaft;
the base is in transmission connection with the rotating shaft and comprises a working surface for placing a piece to be tested;
the locking assembly is arranged on the base and used for fixing the piece to be detected on the working surface;
the magnet is used for being magnetically connected with the piece to be detected;
the pull rod and the magnet are of an integrated structure;
the pull rod is welded with the magnet;
the locking assembly comprises a pressure plate and a locking piece; the locking piece penetrates through the pressing plate and is connected with the base;
the magnet drawing force testing device further comprises a force measuring assembly, wherein the force measuring assembly is connected with the pull rod and used for measuring acting force between the magnet and the piece to be tested.
2. The magnet drawing force testing device according to claim 1, wherein the steering mechanism includes a servo motor.
3. The magnet pulling force testing device according to claim 1, wherein the locking member is a bolt.
4. The magnet pull force testing device of claim 1, wherein the locking assembly further comprises a limiting member mounted on the base and located on a side of the pressing plate facing the base for limiting a limit position between the pressing plate and the working surface.
5. The device for testing magnet drawing force according to claim 4, wherein the stopper is integrally formed with the base.
6. The magnet pull force testing device of claim 1, wherein there are two of said locking assemblies.
7. The magnet pull force testing device of claim 1, wherein the force measuring assembly comprises a force measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011432117.9A CN112362213B (en) | 2020-12-07 | 2020-12-07 | Magnet drawing force testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011432117.9A CN112362213B (en) | 2020-12-07 | 2020-12-07 | Magnet drawing force testing device |
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| Publication Number | Publication Date |
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| CN112362213A CN112362213A (en) | 2021-02-12 |
| CN112362213B true CN112362213B (en) | 2022-06-07 |
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| CN202011432117.9A Active CN112362213B (en) | 2020-12-07 | 2020-12-07 | Magnet drawing force testing device |
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