CN110911231A - Magnetizing and demagnetizing method and device for magnetic latching relay with built-in three-pole magnetic steel - Google Patents
Magnetizing and demagnetizing method and device for magnetic latching relay with built-in three-pole magnetic steel Download PDFInfo
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- CN110911231A CN110911231A CN201911333879.0A CN201911333879A CN110911231A CN 110911231 A CN110911231 A CN 110911231A CN 201911333879 A CN201911333879 A CN 201911333879A CN 110911231 A CN110911231 A CN 110911231A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H49/00—Apparatus or processes specially adapted to the manufacture of relays or parts thereof
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- H—ELECTRICITY
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
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- H01F13/003—Methods and devices for magnetising permanent magnets
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Abstract
The invention discloses a magnetizing and demagnetizing method and device for a magnetic latching relay with built-in tripolar magnetic steel. The tripolar magnetic steel changes the original disordered magnetic domain direction in the tripolar magnetic steel under the instantaneous strong magnetic field of the tripolar magnetic field (the magnetic pole direction is opposite) so that the tripolar magnetic steel is magnetized in a permanent way by the remanence arranged from the center plane of the magnetizing magnetic field in a bidirectional symmetrical way, the tripolar magnetic steel shows the tripolar characteristic, and under the condition that the center line of the tripolar magnetic steel is positioned on the center symmetrical plane of the magnetizing and demagnetizing magnetic field at the two sides and the magnetic field intensity of the magnetizing magnetic field is the same, the middle magnetic pole of the charging and discharging effect is positioned on the center plane of the tripo.
Description
Technical Field
The invention relates to a magnetizing and demagnetizing method and device for a magnetic latching relay with built-in three-pole magnetic steel.
Background
The magnetic latching relay is a new type relay developed in recent years, is an automatic switch, and has the same function of automatically switching on and off a circuit as other electromagnetic relays. The magnetic latching relay has the advantages that the normally closed state or the normally open state of the magnetic latching relay completely depends on the action of permanent magnetic steel, and the switching state of the magnetic latching relay is triggered by pulse electric signals with certain width to complete the switching.
The magnetic steel is used as one of important components in the magnetic latching relay, when the magnetic latching relay is assembled by the magnetic steel, the magnetizing and demagnetizing operation needs to be carried out on the magnetic steel, when the existing magnetizing and demagnetizing device is used for magnetizing and demagnetizing the magnetic steel, the difference of the magnetic induction intensity of the end of the magnetic steel is large, the difference of the holding force at two sides is large, the difference of the voltage of front excitation action and back excitation action is large, the magnetic steel in the state is arranged on the magnetic circuit part of the magnetic latching relay, so that the holding force at two ends of the magnetic circuit part is unbalanced, and the consistency of the environmental resistance and the.
When the magnetic latching relay is subjected to electric service life or vibration and impact tests, because the difference causes test failure, a contact on one side is seriously ablated and fails while the other side is normal during the electric service life test, and the side with small holding force in the vibration and impact test process is disordered and fails.
Disclosure of Invention
One object of the present invention is to provide a magnetizing and demagnetizing method for a magnetic latching relay with built-in three-pole magnetic steel. The method has the advantages that the operation process is simple and convenient, the tripolar magnetic force characteristic is displayed after the tripolar magnetic steel is magnetized, the magnetic force stability is strong, the middle magnetic pole of the tripolar magnetic steel is just on the central line of the tripolar magnetic steel, the magnetic induction intensity consistency of the magnetic poles at the two ends is good, the magnetic poles are fixed on the magnetic latching relay through riveting, the loop holding force balance at the two sides of the relay is good, and the difference of the holding force of the magnetic latching relay under the front excitation state and the back excitation state is small.
The implementation method of the invention comprises the following steps:
step S01: magnetizing the tripolar magnetic steel through the tripolar magnetic field;
step S02: magnetizing and demagnetizing the three-pole magnetic steel under a certain magnetizing and demagnetizing voltage condition, testing the magnetic induction intensity of the magnetic poles at the two ends and the south poles of the three-pole magnetic steel after magnetizing and demagnetizing, and executing a step S03 if the magnetic induction intensity is measured to reach 260-300 Gs and the difference between the two sides is less than 20Gs, otherwise executing a step S05;
step S03: the three-pole magnetic steel is aged, the three-pole magnetic steel is taken out after the aging is finished, magnetic induction intensity rechecking is carried out on the three-pole magnetic steel, and if the magnetic induction intensity meets a specified value, the three-pole magnetic steel is installed on a magnetic circuit part of the magnetic latching relay;
step S04: after the armature is installed, the holding force of the armature end is tested, and one of the following steps is executed according to the test result:
1) if the holding force has larger deviation with the preset index parameter of the product, judging whether the riveting clearance is too large or the armature working surface has the reason of redundancy, if so, adjusting the riveting clearance or processing the armature working surface; if not, the installed tripolar magnetic steel is taken down, and the steps S01 to S04 are repeated;
2) if the retention force is within the preset index parameter range of the product but the difference between the two ends is more than 0.5N, the installed three-pole magnetic steel needs to be subjected to single-side two-pole demagnetization, and the side with large retention force is demagnetized;
step S05: performing magnetizing and demagnetizing on the three-pole magnetic steel for more than two times, then testing the magnetic induction intensity of the south-pole magnetic poles at two ends of the three-pole magnetic steel, and executing the step S03 if the magnetic induction intensity is measured to reach 260-300 Gs and the difference between the two sides is less than 20 Gs; otherwise, rejecting.
Further, before the step S01 magnetizes the magnetic steel with three poles, the magnetic steel with three poles is not allowed to be magnetized.
Further, the step S03 is carried out for 10-36 h at the temperature of 160-300 ℃.
Further, in step S04, 2), when single-sided two-pole demagnetization is performed on the three-pole magnetic steel, the demagnetization voltage gradually increases from 200 vd.c. The demagnetization voltage is gradually increased from 200Vd.c according to the first demagnetization effect, so that the situation that the retention force is reversely different again due to too low magnetic induction on the demagnetization side caused by too large demagnetization quantity, namely the situation that the magnetic retention force of the demagnetization surface is small is avoided.
The invention also aims to provide a magnetizing and demagnetizing device of a magnetic latching relay with built-in three-pole magnetic steel, which comprises a magnetizing and demagnetizing machine and a three-pole magnetizing and demagnetizing clamp for fixing the three-pole magnetic steel, wherein the magnetizing and demagnetizing machine comprises three-pole magnetizing and demagnetizing coils, the three-pole magnetizing and demagnetizing coils are arranged in a three-pole magnetizing and demagnetizing coil shell, and a three-pole magnetizing and demagnetizing cavity is formed in the three-pole magnetizing and demagnetizing coil shell.
Furthermore, the three-pole magnetizing and demagnetizing coil is of a double-coil structure, and the winding directions of the double coils are opposite; the difference of the number of winding turns of the double coils under the same winding wire diameter is not more than 8%. When the power is loaded in the forward discharge of the three-pole magnetizing and demagnetizing coil, the double coils generate strong magnetic fields with opposite instantaneous directions and symmetry to realize three-pole magnetizing of magnetic three-pole steel, three-pole demagnetization is realized by reverse discharge, and the magnetic induction intensity and the direction of the three-pole demagnetizing field and the magnetizing field are the same under the same magnetizing and demagnetizing voltage.
Further, the demagnetization machine still includes two pole demagnetization coils, two pole demagnetization coils install in two pole demagnetization coil shells, two pole demagnetization chamber is formed in two pole demagnetization coil shells. When a power supply is loaded on the two-pole demagnetization coil, the two-pole demagnetization coil generates an instantaneous strong magnetic field, the direction of the instantaneous strong magnetic field is opposite to that of the original magnetic field of the three-pole magnetic steel, and the side, which is the same as the original magnetic field of the three-pole magnetic steel, is not changed under the condition that the demagnetization magnetic field is smaller than the original magnetic field of the three-pole magnetic steel, so that two-pole demagnetization is realized; and (4) carrying out secondary demagnetization on the tripolar magnetic steel in the direction of the demagnetization magnetic field by 180 degrees, thus realizing tripolar demagnetization.
Furthermore, the magnetizing and demagnetizing device provided by the invention further comprises a switch, and a power supply is loaded on the three-pole magnetizing and demagnetizing coil or the two-pole demagnetizing coil through the switch. The three-pole magnetizing and demagnetizing coil and the two-pole demagnetizing coil are switched through the change-over switch, and the three-pole magnetizing and demagnetizing coil and the two-pole demagnetizing coil are prevented from being in a working state at the same time.
Furthermore, when the two-pole demagnetization coil demagnetizes the three-pole magnetic steel, the three-pole magnetic steel is demagnetized outside the two-pole demagnetization coil, and the demagnetization voltage is less than or equal to 900Vd.c.
Furthermore, a regulating device is installed on the three-pole magnetizing and demagnetizing coil shell.
The principle of the invention is as follows: the tripolar magnetic steel is aged at high temperature, the remanence stability of the tripolar magnetic steel under the high-temperature condition is ensured, and the magnetic pole offset possibly occurring in the middle magnetic pole of the tripolar magnetic steel pole under the high-temperature state is reduced.
The tripolar magnetic steel changes the original disordered magnetic domain direction in the tripolar magnetic steel under the instantaneous strong magnetic field of the tripolar magnetic field (the magnetic pole direction is opposite) so that the tripolar magnetic steel is magnetized in a permanent way by the remanence arranged from the center plane of the magnetizing magnetic field in a bidirectional symmetrical way, the tripolar magnetic steel shows the tripolar characteristic, and under the condition that the center line of the tripolar magnetic steel is positioned on the center symmetrical plane of the magnetizing and demagnetizing magnetic field at the two sides and the magnetic field intensity of the magnetizing magnetic field is the same, the middle magnetic pole of the charging and discharging effect is positioned on the center plane of the tripo.
The tripolar magnetic steel is demagnetized in the tripolar demagnetization coil, receive the tripolar demagnetization magnetic field opposite to inside remanence direction of itself, and break up the direction of its inside partial magnetic domain originally arranging the direction and make it offset each other and demagnetize, if the tripolar demagnetization magnetic field is too big can break up all magnetic domain arrangement directions completely and make the tripolar magnetic steel lose magnetism, if the control that the magnetic domain arrangement direction symmetrical center line of the tripolar magnetic steel originally passes through demagnetization anchor clamps is on the demagnetization magnetic field center line of tripolar demagnetization coil, and the both sides demagnetization magnetic field intensity line of demagnetization coil is the same and the volume of breaking up the magnetic domain arrangement direction is the same, make the magnetic field demagnetization volume the same, the magnetic steel demagnetization effect both sides magnetic induction intensity difference is very little under the little or the same condition of tripolar magnetic steel both sides magnetic induction intensity difference before the demagnetization.
The three-pole magnetic steel is demagnetized in the two-pole demagnetization coil, the demagnetization position is carried out by an external magnetic field of the demagnetization coil, and the internal magnetic field cannot effectively adjust the demagnetization voltage due to overlarge magnetic induction intensity; the demagnetized side faces downwards, under the action of the instantaneous strong magnetic field of the demagnetization coil, the magnetic domain arrangement direction in the three-pole magnetic steel is demagnetized on the side opposite to the direction of the demagnetization field, the demagnetization principle is the same as the three-pole demagnetization principle, and the magnetic domain arrangement direction is the same as the demagnetization magnetic field, so that the demagnetization magnetic field is far smaller than the magnetic field of the three-pole magnetic steel, and the three-pole magnetic steel cannot be magnetized. The three-pole magnetic steel is rotated by 180 degrees, demagnetization can be performed on the other side under the condition of the same demagnetization magnetic field, and three-pole demagnetization is realized.
Demagnetization does not allow magnet steel to be demagnetized under the condition that demagnetization and demagnetization voltage set up to exceed more than 900Vd.c. in the two-pole demagnetization coil, otherwise tripolar magnet steel can be too big because of the opposite one side demagnetization volume in demagnetization magnetic field, and magnetize with the same one side of demagnetization magnetic field direction, and the central symmetry of magnetic pole is destroyed, can make the tripolar magnet steel magnetic pole become two when serious, loses its due effect in the relay.
The invention has the beneficial effects that: the invention solves the problems that the magnetic induction intensity consistency of the magnetic poles at the end is poor due to the fact that the middle magnetic pole is not on the central line of the magnetic steel when the original three-pole magnetic steel is magnetized and demagnetized, the magnetic induction intensity difference of the magnetic poles at two sides is large and the like due to the fact that the middle magnetic pole is deviated when the three-pole magnetic steel is demagnetized. Repeated demagnetization and complicated operations of the demagnetization are achieved, and if the consistency of product assembly is well controlled, repeated demagnetization and magnetization of the same product are not needed.
By using the method for magnetizing and demagnetizing, the difference of the magnetic holding force in the front excitation state, the rear excitation state and the action voltage state is effectively controlled to be below 0.4N, and the difference of the action voltage is controlled to be below 8% of the rated voltage. The consistency of the action voltage and the magnetic holding force is well controlled, the consistency adjustment of other parameters of the product such as contact pressure and over travel is facilitated, and the consistency of the environmental adaptation resistance and the load resistance of the product is obviously improved.
The magnetizing and demagnetizing device provided by the invention utilizes the tripolar magnetizing and demagnetizing coil to magnetize and demagnetize the tripolar magnetic steel, so that the magnetic poles in the middle of the tripolar magnetic steel are ensured to be positioned on the central line of the magnetic steel, and the magnetic induction intensity of the magnetic poles at the ends is consistent.
Utilize two pole demagnetization coils to realize under the inconsistent condition of tripolar magnet steel both ends magnetic pole intensity, demagnetize to that one side that intensity is big, can not influence that one side that intensity is low, avoided because of need demagnetizing the tripolar magnet steel one side and lead to adjusting the loaded down with trivial details operation that tripolar demagnetization anchor clamps demagnetize repeatedly.
The configuration two-pole demagnetization coil has still realized redundancy, and when the unable during operation of tripolar demagnetization coil, two-pole demagnetization coil can realize tripolar demagnetization.
The two-pole demagnetization fixture is used for fixing the three-pole magnetic steel when two poles are demagnetized, and consistency of the three-pole magnetic steel when one side is demagnetized is guaranteed.
The adjustment of the magnetizing and demagnetizing positions is realized through the adjusting device, so that the symmetrical center plane of the magnetizing magnetic field is just positioned on the symmetrical center line of the magnetic steel to be magnetized and demagnetized, and the magnetizing consistency is further ensured; after the adjustment is completed, a batch of magnetic steel to be magnetized and demagnetized is magnetized and demagnetized, and the magnetization at the same position is ensured, so that the consistency of the magnetizing effect of the whole batch of products is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate examples consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic structural diagram of a magnetization and demagnetization device according to an example of the present invention;
fig. 2 is a cross-sectional view illustrating a structure of a magnetizing and demagnetizing device according to an exemplary embodiment of the present invention;
fig. 3 is a cross-sectional view illustrating magnetization of a magnetization and demagnetization device according to an exemplary embodiment of the present invention;
FIG. 4 is a schematic diagram of the polarity of three poles after the magnetic steel of three poles is magnetized;
fig. 5 is a cross-sectional view illustrating demagnetization of a magnetization and demagnetization device according to an exemplary embodiment of the present invention;
fig. 6 is a schematic structural diagram of a magnetizing and demagnetizing device according to a second embodiment of the present invention;
fig. 7 is a cross-sectional view of the demagnetization of the three-pole magnetic steel on the two-pole demagnetization coil;
fig. 8 is a schematic structural diagram of a magnetizing and demagnetizing device according to a third example of the present invention;
fig. 9 is a schematic structural diagram of a two-pole demagnetization fixture provided by the present invention;
fig. 10 is a schematic structural diagram of a three-pole magnetizing and demagnetizing fixture provided by the present invention;
fig. 11 is a schematic structural diagram of a three-pole magnetizing and demagnetizing coil provided by the present invention;
in the drawings: 1-magnetizing and demagnetizing machine, 2-three pole magnetizing and demagnetizing fixture, 3-three pole magnetizing and demagnetizing coil casing, 4-two pole demagnetizing coil casing, 5-change-over switch, 6-two pole demagnetizing fixture, 7-adjusting device, 8-three pole magnetic steel, 11-three pole magnetizing and demagnetizing coil, 12-two pole demagnetizing coil, 13-operation interface, 14-change-over knob, 21-second fixture body, 22-positioning block, 31-three pole magnetizing and demagnetizing cavity, 41-two pole demagnetizing cavity, 61-fixed slot, 62-first fixture body, 71-adjusting screw, 72-nut, 211-magnetic steel slot.
Detailed Description
Illustrative examples will now be described more fully with reference to the accompanying drawings. The illustrative examples, however, may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. In the drawings, the size of some of the elements may be exaggerated or distorted for clarity. The same reference numerals denote the same or similar structures in the drawings, and thus detailed descriptions thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more examples. In the following description, numerous specific details are provided to give a thorough understanding of examples of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, etc. In other instances, well-known structures, methods, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
The invention provides a magnetizing and demagnetizing method for a magnetic latching relay with built-in three-pole magnetic steel, which comprises the following steps:
step S01: magnetizing the tripolar magnetic steel through the tripolar magnetic field;
step S02: magnetizing and demagnetizing the three-pole magnetic steel under a certain magnetizing and demagnetizing voltage condition, testing the magnetic induction intensity of the magnetic poles at the two ends and the south poles of the three-pole magnetic steel after magnetizing and demagnetizing, and executing a step S03 if the magnetic induction intensity is measured to reach 260-300 Gs and the difference between the two sides is less than 20Gs, otherwise executing a step S05;
step S03: the three-pole magnetic steel is aged, the three-pole magnetic steel is taken out after the aging is finished, magnetic induction intensity rechecking is carried out on the three-pole magnetic steel, and if the magnetic induction intensity meets a specified value, the three-pole magnetic steel is installed on a magnetic circuit part of the magnetic latching relay;
step S04: after the armature is installed, the holding force of the armature end is tested, and one of the following steps is executed according to the test result:
1) if the holding force has larger deviation with the preset index parameter of the product, judging whether the riveting clearance is too large or the armature working surface has the reason of redundancy, if so, adjusting the riveting clearance or processing the armature working surface; if not, the installed tripolar magnetic steel is taken down, and the steps S01 to S04 are repeated;
2) if the retention force is within the preset index parameter range of the product but the difference between the two ends is more than 0.5N, the installed three-pole magnetic steel needs to be subjected to single-side two-pole demagnetization, and the side with large retention force is demagnetized;
step S05: performing magnetizing and demagnetizing on the three-pole magnetic steel for more than two times, then testing the magnetic induction intensity of the south-pole magnetic poles at two ends of the three-pole magnetic steel, and executing the step S03 if the magnetic induction intensity is measured to reach 260-300 Gs and the difference between the two sides is less than 20 Gs; otherwise, rejecting.
The magnetizing and demagnetizing method for the magnetic latching relay with built-in three-pole magnetic steel provided by the invention is described by taking the three-pole magnetic steel as a rectangular symmetrical structure with two central shafts provided with raised heads as an example, and it can be understood that the shape of the three-pole magnetic steel 8 is not a limitation to the technical scheme claimed by the invention, and the method belongs to the protection scope of the invention within the comprehensible scope of the skilled person.
Magnetizing through a three-pole magnetic field of the three-pole magnetizing and demagnetizing coil 11 to enable two salient ends of the three-pole magnetic steel 8 to be electromagnetic north poles and the central line to be electromagnetic south poles, as shown in fig. 4; the method does not allow magnetism to be attached before magnetizing the three-pole magnetic steel 8 so as to avoid causing the performance difference of the three-pole magnetic steel 8 after magnetizing, and needs to be stabilized and aged before being installed in a magnetic circuit part, and comprises the following steps: the three-pole magnetic steel 8 is fixed for magnetization and demagnetization in a magnetization and demagnetization coil of a three-pole magnetization and demagnetization machine by a magnetization and demagnetization clamp, the magnetization and demagnetization voltage is (200-300) Vd.c., gauss meters are used for sampling to test the magnetic induction intensity at the positions of two magnetic poles (N) of the three-pole magnetic steel 8, the measured magnetic induction intensity is required to reach (260-300) Gs, the difference between the two sides is not required to be more than 20Gs, if the magnetic induction intensity difference of the individual three-pole magnetic steel 8 in a batch for magnetization and demagnetization under the same magnetization and demagnetization condition is more than 20Gs, the magnetization and demagnetization are required to be carried out again for more than two times, and if the required elimination is not required; putting the qualified product into a preset high-temperature oven, setting the temperature to be 160-300 ℃, aging for 10-36 h, taking out, rechecking the magnetic induction intensity, and if the magnetic induction intensity is smaller than or larger than a specified value, performing magnetizing and demagnetizing and magnetic stabilization aging again, and riveting and fixing the qualified product on a magnetic circuit part through tiny clearance fit of a raised head and a pole shoe; in the practical operation process of the magnetization and demagnetization test, because the magnetic induction intensity of the three-pole magnetic steel is large in difference of test values in different directions, the reading jumping frequency is fast and sensitive, and the HOLD key of a gaussmeter needs to be pressed to obtain the maximum value during the test; after the armature is loaded, a dynamometer is used for testing the holding force of the armature end, if the holding force has larger deviation with the preset index parameters of the product, the product needs to be adjusted, whether riveting clearance is too large or whether redundant reasons exist on the working surface of the armature, if the factors do not influence the factors, the abnormal product needs to be re-magnetized and demagnetized, the specific magnetizing and demagnetizing voltage index is adjusted according to the actual difference condition of the product until reaching the specified range of the holding force, if the holding force of individual product is in the range but the difference between two ends is more than 0.5N, the product needs to be demagnetized on one side, for large-scale demagnetization, the demagnetization voltage starts from 200Vd.c, and gradually increases according to the first demagnetization effect, so as to avoid the situation that the magnetic induction on the demagnetization side is too low due to too large demagnetization quantity, namely the situation that the magnetic retention force on the demagnetization surface is too small, and the situation of the reversed difference of the retention force is caused again.
The above magnetization and demagnetization methods can be implemented by any device, and the following magnetization and demagnetization devices capable of implementing the above magnetization and demagnetization methods are provided.
Example 1
This example provides a built-in tripolar magnet steel's magnetic latching relay magnetization and demagnetization device has included magnetization and demagnetization machine 1 and has been used for the tripolar magnetization and demagnetization anchor clamps 2 of fixed tripolar magnet steel 8, and magnetization and demagnetization machine 1 includes tripolar magnetization and demagnetization coil 11, and tripolar magnetization and demagnetization coil 11 is installed in tripolar magnetization and demagnetization coil casing 3, forms tripolar magnetization and demagnetization chamber 31 in the tripolar magnetization and demagnetization coil casing 3, as shown in fig. 1, fig. 2.
When the magnetizing and demagnetizing device provided by the example is used for magnetizing and demagnetizing, the three-pole magnetic steel 8 is placed in the three-pole magnetizing and demagnetizing cavity 31, the three-pole magnetizing and demagnetizing coil 11 is loaded with power, and the magnetic field of the three-pole magnetizing and demagnetizing coil 11 is as shown in fig. 3; the three-pole magnetizing and demagnetizing coil 11 generates an instantaneous strong magnetic field with opposite directions and symmetry to realize three-pole magnetizing of the three-pole magnetic steel 8, so that the magnetizing is completed, and the three-pole polarity of the magnetized three-pole magnetic steel 8 is shown in fig. 4; when the three-pole magnetizing and demagnetizing device is used for demagnetizing, the three-pole magnetic steel 8 is arranged in the three-pole magnetizing and demagnetizing cavity 31, and a power supply is loaded on the three-pole magnetizing and demagnetizing coil 11, as shown in fig. 5, the three-pole magnetizing and demagnetizing coil 11 generates an instantaneous symmetrical strong magnetic field which is opposite to the original magnetic field of the three-pole magnetic steel 8, and the reverse magnetization is realized to realize three-pole demagnetization.
The demagnetization principle of the magnetization and demagnetization device provided by the example is as follows: the three-pole magnetic steel 8 is demagnetized in the three-pole demagnetization coil 11, and receives a three-pole demagnetization magnetic field opposite to the internal remanence direction of the three-pole magnetic steel, and breaks up the original arrangement direction of partial magnetic domains inside the three-pole demagnetization magnetic field to be offset and demagnetized, if the three-pole demagnetization magnetic field is too large, all the magnetic domain arrangement directions can be completely broken up to make the three-pole magnetic steel 8 lose magnetism, if the original magnetic domain arrangement direction symmetrical center line of the three-pole magnetic steel 8 is controlled on the demagnetization magnetic field center line of the three-pole demagnetization coil 11 through a demagnetization clamp, and the two-side demagnetization magnetic field intensity lines of the demagnetization coil are the same, and the quantity of the broken up magnetic domain arrangement directions is the same, so that the magnetic field demagnetization quantity is the same, and the magnetic induction intensity difference of the two sides of the three-pole magnetic steel 8 is not large or the same is.
Example two
The magnetic latching relay magnetizing and demagnetizing device with built-in three-pole magnetic steel provided by the example comprises all technical characteristics of the magnetic latching relay magnetizing and demagnetizing device with built-in three-pole magnetic steel provided by the example, the magnetizing and demagnetizing machine 1 further comprises a two-pole demagnetizing coil 12, the two-pole demagnetizing coil 12 is installed in the two-pole demagnetizing coil shell 4, and a two-pole demagnetizing cavity 41 is formed in the two-pole demagnetizing coil shell 4, as shown in fig. 6 and 7.
The two-pole demagnetizing coil 12 provided in this example is a general two-pole demagnetizing coil having a single coil structure inside.
As shown in fig. 7, the demagnetization principle of the two-pole demagnetization coil 12 is: at two pole demagnetization coils 12 loading power, two pole demagnetization coils 12 produce instantaneous strong magnetic field and three pole magnet steel 8 original magnetic field opposite side realize the demagnetization and with three pole magnet steel 8 original magnetic field direction the same one side under the original magnetic field condition that the demagnetization magnetic field is less than three pole magnet steel 8 unchanged to realize two pole demagnetization, as long as carry out the second demagnetization to three pole magnet steel 8 in the 180 conversion of demagnetization magnetic field direction, can realize three pole demagnetization.
When the magnetizing and demagnetizing device provided by the invention is adopted to carry out magnetizing and demagnetizing on the whole batch of three-pole magnetic steel, when the magnetic pole strength at two ends of individual three-pole magnetic steel is inconsistent, for the condition that the magnetic pole strength at two ends of individual three-pole magnetic steel is inconsistent, the strength of the three-pole magnetic steel is consistent or has small difference only by utilizing the two-pole demagnetizing coil 12 to carry out two-pole demagnetization, the surface with large demagnetization is combined with the regulating amplitude of the demagnetizing voltage during actual operation, and the amplitude is smaller when the three-pole magnetic steel is closer to a target.
The three-pole magnetic steel 8 is demagnetized in the two-pole demagnetization coil 12, the demagnetization position is carried out by an external magnetic field of the demagnetization coil, and the internal magnetic field cannot effectively adjust the demagnetization voltage due to overlarge magnetic induction intensity; the demagnetized side faces downwards, under the action of the instantaneous strong magnetic field of the demagnetization coil, the magnetic domain arrangement direction in the three-pole magnetic steel is demagnetized on the side opposite to the direction of the demagnetization field, the demagnetization principle is the same as the three-pole demagnetization principle, and the magnetic domain arrangement direction is the same as the demagnetization magnetic field, so that the demagnetization magnetic field is far smaller than the magnetic field of the magnetic steel, and the magnetic steel cannot be magnetized.
Demagnetization does not allow the tripolar magnet steel to demagnetize under the condition that demagnetization and demagnetization voltage set up and exceed more than 900Vd.c. in two poles demagnetization coil 12, otherwise the tripolar magnet steel can be too big because of the opposite one side demagnetization volume in demagnetization magnetic field, and magnetize with the same one side in demagnetization magnetic field direction, the central symmetry of magnetic pole is destroyed, can make the tripolar magnet steel magnetic pole become two poles when serious, loses its due effect in the relay.
Example three
The magnetic latching relay magnetizing and demagnetizing device with built-in three-pole magnetic steel provided by the present example includes all technical features of the magnetic latching relay magnetizing and demagnetizing device with built-in three-pole magnetic steel provided by the second example, and further includes a switch 5, and a power supply is loaded on the three-pole magnetizing and demagnetizing coil 11 or the two-pole demagnetizing coil 12 through the switch 5, as shown in fig. 8.
The change-over switch 5 can adopt any one of the existing switches, a single-pole double-throw switch is adopted, the power supply is loaded on the three-pole magnetizing and demagnetizing coil 11 or the two-pole demagnetizing coil 12 through the single-pole double-throw switch, the condition that the three-pole magnetizing and demagnetizing coil 11 and the two-pole demagnetizing coil 12 are in the working state at the same time is avoided, and the service life of the magnetizing and demagnetizing device is prolonged.
In order to guarantee that the magnet steel to be magnetized and demagnetized in the process of the two-pole magnetization and demagnetization can be stable, the magnet steel magnetizing and demagnetizing device further comprises a two-pole demagnetization clamp 6 on the basis of the second example and the third example, and the two-pole demagnetization clamp 6 is utilized to fix the three-pole magnet steel 8 which needs to be magnetized and demagnetized in two poles.
The two-pole demagnetization jig 6 may be any one of those known in the art, and the two-pole demagnetization jig 6 used herein includes a first jig body 62 having a fixing groove 61, as shown in fig. 9.
As shown in fig. 7, the two-pole demagnetization fixture 6 is used on the two-pole demagnetization coil 12, and the two-pole demagnetization fixture is completely fixed at the position outside the coil magnetic field, demagnetizes the single-sided magnetic pole of the three-pole magnetic steel 8, and fixes the magnetic pole at the same position to ensure the consistency of the demagnetization magnetic field intensity when the demagnetization voltages are the same; when the method is used for magnetizing and demagnetizing the batch of magnetic steels, the action voltage of individual products is large and small after correction, and the single-sided demagnetization is carried out on the large action voltage.
Example four
The magnetizing and demagnetizing device for the magnetic latching relay with built-in three-pole magnetic steel provided by the present example includes all technical features of the magnetizing and demagnetizing device for the magnetic latching relay with built-in three-pole magnetic steel provided by the first example, the second example and the third example, and the adjusting device 7 is installed on the three-pole magnetizing and demagnetizing coil housing 3, as shown in fig. 2.
The adjusting device 7 may be any one of those known in the art, and includes an adjusting screw 71 and a nut 72, as shown in fig. 2. The magnetizing and demagnetizing positions are adjusted through the adjusting screw rods 71, so that the symmetrical center plane of the magnetizing and demagnetizing magnetic field is just on the symmetrical center line of the three-pole magnetic steel 8, and the consistency of the magnetizing effect is ensured by fixing the nuts 72. When the magnetizing device is used for magnetizing and demagnetizing the whole batch of magnetic steel, the whole batch of magnetic steel is magnetized and demagnetized at the same position due to the fixed magnetizing position.
The three-pole magnetizing and demagnetizing fixture 2 described in the first to fourth examples includes a second fixture body 21 and a positioning block 22, and the second fixture body 21 is provided with a magnetic steel groove 211 for fixing three-pole magnetic steel, as shown in fig. 10.
As shown in fig. 2 and 10, the positioning block 22 and the magnetic steel groove 211 in the three-pole magnetizing and demagnetizing fixture 2 are matched to completely position the product in all directions, and the three-pole magnetizing and demagnetizing process does not need manual positioning and avoids middle magnetic pole offset or end magnetic pole magnetic induction difference caused by the fact that the three-pole magnetic steel 8 jumps out of the range of the central plane of the magnetizing and demagnetizing magnetic field due to the residual magnetic reaction force of the three-pole magnetic steel 8 when magnetizing and demagnetizing are performed.
As shown in fig. 11, in the first to fourth examples, the three-pole magnetizing and demagnetizing coil 11 is described as a double-coil structure, the winding directions of the double coils are opposite, and the difference between the number of winding turns of the double coils is not greater than 8% in the same winding diameter. Of course any other configuration of demagnetization coil is possible.
The magnetizing and demagnetizing machine 1 disclosed herein may be any one, such as GM29200 magnetizing and demagnetizing machine, which includes an operation interface 13, wherein three-pole magnetizing and demagnetizing are switched by a switching knob 14 on the operation interface 13 of the magnetizing machine. By adjusting the current magnitude loaded on the three-pole magnetizing and demagnetizing coil 11 and the two-pole demagnetizing coil 12, stepping magnetizing and demagnetizing can be realized.
The present disclosure has been described by way of the above-described related examples, which are, however, merely examples for practicing the present disclosure. It must be noted that the disclosed examples do not limit the scope of the disclosure. Rather, variations and modifications are possible within the spirit and scope of the disclosure, and these are all within the scope of the disclosure.
Claims (10)
1. A magnetizing and demagnetizing method for a magnetic latching relay with built-in three-pole magnetic steel is characterized by comprising the following steps: the method comprises the following steps:
step S01: magnetizing the magnetic steel through a tripolar magnetic field to enable the magnetic steel to show tripolar characteristics;
step S02: magnetizing and demagnetizing the three-pole magnetic steel under a certain magnetizing and demagnetizing voltage condition, testing the magnetic induction intensity of the magnetic poles at the two ends and the south poles of the three-pole magnetic steel after magnetizing and demagnetizing, and executing a step S03 if the magnetic induction intensity is measured to reach 260-300 Gs and the difference between the two sides is less than 20Gs, otherwise executing a step S05;
step S03: the three-pole magnetic steel is aged, the three-pole magnetic steel is taken out after the aging is finished, magnetic induction intensity rechecking is carried out on the three-pole magnetic steel, and if the magnetic induction intensity meets a specified value, the three-pole magnetic steel is installed on a magnetic circuit part of the magnetic latching relay;
step S04: after the armature is installed, the holding force of the armature end is tested, and one of the following steps is executed according to the test result:
1) if the holding force has larger deviation with the preset index parameter of the product, judging whether the riveting clearance is too large or the armature working surface has the reason of redundancy, if so, adjusting the riveting clearance or processing the armature working surface; if not, the installed tripolar magnetic steel is taken down, and the steps S01 to S04 are repeated;
2) if the retention force is within the preset index parameter range of the product but the difference between the two ends is more than 0.5N, the installed three-pole magnetic steel needs to be subjected to single-side two-pole demagnetization, and the side with large retention force is demagnetized;
step S05: performing magnetizing and demagnetizing on the three-pole magnetic steel for more than two times, then testing the magnetic induction intensity of the south-pole magnetic poles at two ends of the three-pole magnetic steel, and executing the step S03 if the magnetic induction intensity is measured to reach 260-300 Gs and the difference between the two sides is less than 20 Gs; otherwise, rejecting.
2. The method for magnetizing and demagnetizing a magnetic latching relay with built-in three-pole magnetic steel according to claim 1, wherein: and before the step S01 is performed on the three-pole magnetic steel, the three-pole magnetic steel is not allowed to be magnetized.
3. The magnetizing and demagnetizing method for the magnetic latching relay with built-in three-pole magnetic steel according to claim 1 or 2, wherein: and S03, aging for 10-36 h at 160-300 ℃.
4. The magnetizing and demagnetizing method for the magnetic latching relay with built-in three-pole magnetic steel according to claim 1 or 2, wherein: and 2) in the step S04, when single-sided two-pole demagnetization is performed on the three-pole magnetic steel, the demagnetization voltage gradually increases from 200 vd.c.
5. The utility model provides a built-in tripolar magnet steel's magnetic latching relay magnetization and demagnetization device which characterized in that: the device includes magnetization and demagnetization machine (1) and tripolar magnetization and demagnetization anchor clamps (2) that are used for fixed tripolar magnet steel, magnetization and demagnetization machine (1) is including tripolar magnetization and demagnetization coil (11), tripolar magnetization and demagnetization coil (11) are installed in tripolar magnetization and demagnetization coil casing (3), tripolar magnetization and demagnetization coil casing (3) are formed the tripolar magnetization and demagnetization chamber (31).
6. The magnetizing and demagnetizing device for the magnetic latching relay with built-in three-pole magnetic steel according to claim 5, wherein: the magnetizing and demagnetizing machine (1) further comprises a two-pole demagnetizing coil (12) used for demagnetizing three-pole magnetic steel, the two-pole demagnetizing coil (12) is installed in the two-pole demagnetizing coil shell (4), and a two-pole demagnetizing cavity (41) is formed in the two-pole demagnetizing coil shell (4).
7. The magnetizing and demagnetizing device for the magnetic latching relay with built-in three-pole magnetic steel according to claim 6, wherein: still include change over switch (5), the power warp change over switch (5) load in tripolar demagnetization coil (11) or on dipolar demagnetization coil (12).
8. The magnetizing and demagnetizing device for the magnetic latching relay with built-in three-pole magnetic steel according to claim 6 or 7, wherein: when two pole demagnetization coils (12) demagnetize three-pole magnetic steel, three-pole magnetic steel is in the outside demagnetization of two pole demagnetization coils (12), demagnetization voltage is less than or equal to 900Vd.c.
9. The magnetizing and demagnetizing device for the magnetic latching relay with built-in three-pole magnetic steel according to claim 6 or 7, wherein: the device also comprises a dipolar demagnetization clamp (6).
10. The magnetizing and demagnetizing device for the magnetic latching relay with built-in three-pole magnetic steel according to claim 5, 6 or 7, wherein: and the three-pole magnetizing and demagnetizing coil shell (3) is provided with an adjusting device (7).
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| CN201911333879.0A CN110911231A (en) | 2019-12-23 | 2019-12-23 | Magnetizing and demagnetizing method and device for magnetic latching relay with built-in three-pole magnetic steel |
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| CN201911333879.0A CN110911231A (en) | 2019-12-23 | 2019-12-23 | Magnetizing and demagnetizing method and device for magnetic latching relay with built-in three-pole magnetic steel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112802653A (en) * | 2021-04-06 | 2021-05-14 | 宁波兴隆磁性技术有限公司 | Magnetizing and demagnetizing method, magnetizing and demagnetizing magnetic head and magnetizing and demagnetizing machine |
| CN112837705A (en) * | 2021-02-25 | 2021-05-25 | 精密电产(北京)科技有限公司 | Demagnetizing method with magnetic field capable of being inverted |
| CN113161103A (en) * | 2021-03-01 | 2021-07-23 | 江苏大学 | Device and method for quantitatively magnetizing and demagnetizing permanent magnet |
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2019
- 2019-12-23 CN CN201911333879.0A patent/CN110911231A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112837705A (en) * | 2021-02-25 | 2021-05-25 | 精密电产(北京)科技有限公司 | Demagnetizing method with magnetic field capable of being inverted |
| CN112837705B (en) * | 2021-02-25 | 2022-05-17 | 精密电产(北京)科技有限公司 | Demagnetizing method with magnetic field capable of being inverted |
| CN113161103A (en) * | 2021-03-01 | 2021-07-23 | 江苏大学 | Device and method for quantitatively magnetizing and demagnetizing permanent magnet |
| CN113161103B (en) * | 2021-03-01 | 2022-12-16 | 江苏大学 | Device and method for quantitatively magnetizing and demagnetizing permanent magnet |
| CN112802653A (en) * | 2021-04-06 | 2021-05-14 | 宁波兴隆磁性技术有限公司 | Magnetizing and demagnetizing method, magnetizing and demagnetizing magnetic head and magnetizing and demagnetizing machine |
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