135 results about "Soft magnet" patented technology

The invention discloses a battery module active and passive combined ejection structure, an energy storage system and a method, relates to the technical field of battery energy storage safety structures, and provides an active and passive combined battery electric / thermal magnetic induction ejection structure design based on electromagnetic induction and magnetic transformation characteristics of soft magnet materials at specific temperature. The ejection safety of the battery pack is guaranteed, the active triggering monitors abnormal information such as voltage and temperature through the BMS, and the system master controller issues an instruction to execute ejection; passive triggering can be automatically triggered without a BMS instruction by utilizing the magnetic transformation characteristic of a soft magnet at a specific temperature (thermal runaway characteristic temperature), the limitation of only depending on BMS active control in the prior art is solved by utilizing an active and passive combined triggering mechanism, and the passive triggering can be automatically triggered even if BMS monitoring is not accurate or a sensor has a fault through mutual complementation of the two mechanisms. And the fault battery pack can still be isolated through passive triggering, so that the potential safety hazard is greatly reduced.

The invention relates to the technical field of soft magnetic ferrite materials, in particular to a preparation method of a high-permeability soft magnetic ferrite core material, which comprises the following steps: firstly, preparing FeSiCrBCu soft magnetic alloy powder with uniform components and controllable particle size through a single-roller quenching and hydrogen decrepitation process, and laying a structural foundation for excellent magnetic performance; and then a mechanical stirring-ultrasonic synergistic coating technology is utilized, so that the ferrite precursor uniformly coats the alloy powder, an effective core-shell structure is formed, and solid-phase reaction and crystal grain uniform growth during sintering are promoted. Besides, a multi-task deep learning model (MTL-DL) based on transfer learning is adopted to carry out multi-objective collaborative optimization on the sintering process, accurately match and dynamically adjust key parameters, and accurately regulate and control the material densification process, the grain size and the phase distribution on the microcosmic level, so that the problem that the microstructure and component uniformity are difficult to accurately control in the prior art is solved; therefore, the problems of poor material performance and high power loss are solved.

The invention discloses a cell sorting micro-fluidic chip and application, the micro-fluidic chip is obliquely arranged on an inclined plane, the micro-fluidic chip comprises a substrate, the substrate is provided with a slender groove with a triangular prism profile, and a micro-fluidic channel is embedded in the slender groove; the upper end and the lower end of the inclined surface respectively face the center and the edge of the turntable; one side of the microfluidic channel back to the substrate is parallel to the upper surface of the substrate, one end of the microfluidic channel is communicated with the fluid buffer cavity, the other end is communicated with the sorting channel, and the other end of the sorting channel is communicated with the plurality of sorting sub-channels; a soft magnet is further arranged on the microfluidic channel, and a permanent magnet is arranged on one side, back on to the microfluidic channel, of the soft magnet. According to the invention, two-parameter sorting of preferential separation of magnetic microspheres according to density and accurate positioning according to size can be realized, high-flux and high-precision two-parameter sorting is realized, the resolution is greatly improved, the energy consumption is low, and the device is suitable for portable equipment.

The utility model relates to the technical field of automobile parts, and discloses a leakproof automobile oil can cover sealing structure which comprises an oil can body, an oil can opening is formed in the upper end of the oil can body, an outer cover is installed at the upper end of the oil can opening, and an inner cover is fixedly connected to the inner side of the lower end of the outer cover. The outer wall of the inner cover is connected with the inner wall of the oil pot opening through a clamping assembly, a cavity is formed in the inner cover, a ventilation assembly is arranged in the cavity, a sealing ring is installed on the upper side of the outer wall of the inner cover, and the outer wall of the sealing ring makes contact with the inner wall of the oil pot opening. A sealing gasket is installed between the outer wall of the inner cover and the inner wall of the outer cover, and the lower end of the sealing gasket makes contact with the upper end of the oil pot opening. According to the utility model, through the cooperation of the clamping rod and the clamping groove, the cooperation of the annular soft magnet and the annular permanent magnet, and the arrangement of the sealing ring and the sealing gasket, the sealing performance can be enhanced from multiple dimensions, so that the oil leakage is effectively prevented.

The invention discloses an intelligent chess and card with magnetic ring chess pieces, and the intelligent chess and card is Chinese chess or international chess and is also suitable for other chess and card types, such as military chess. Multi-system coding is carried out on polarity combinations of magnetic ring positions of the magnetic ring chess pieces, a unique ID is given to each magnetic ring chess piece, each position of the chessboard is correspondingly provided with a magnetic induction chip, the unique ID is recognized, and recognition of the magnetic ring chess pieces is completed; and meanwhile, the magnetic induction chip at each position of the chessboard is coded through a natural sequence or is written with an address code, so that the position of the magnetic ring chess piece on the chessboard is identified. According to the invention, information is transmitted through stable magnetic pole signal combination, and the anti-interference capability is high. The soft magnets are arranged at the chess piece placing positions of the chessboard to enable the magnetic ring chess pieces to return, the problem that the chess piece placing positions are not accurate is effectively solved, and the chess playing hand feeling and the viewing comfort are improved. Identity information of the chess pieces is transmitted in a positioning mode, and operations such as eating, undoing, replaying and the like in the chess playing process are effectively handled.

The application relates to the technical field of soft magnetic ferrite cores, and particularly discloses a grinding device for soft magnetic ferrite core processing and a method thereof, which comprises a feeding frame, a processing bottom frame, a processing top frame and a discharging frame. The surfaces of the soft magnetic ferrite cores are comprehensively ground by two grinding mechanisms symmetrically arranged above and below, manual turning operations of the soft magnetic ferrite cores are not needed, the grinding efficiency of the soft magnetic ferrite cores and the consistency and stability of the grinding are significantly improved, human errors are reduced, and the production efficiency is improved. When the soft magnetic ferrite cores are ground by the two symmetrically arranged grinding mechanisms above and below, the grinding liquid is first sprayed, sufficient cooling can be maintained during the grinding process, and the performance of the cores is prevented from being damaged due to overheating. In addition, the grinding debris generated during the grinding process can be flushed by the grinding liquid, and the grinding effect is prevented from being affected by the grinding debris adsorbed on the soft magnetic ferrite cores.

The utility model relates to the related technical field of soft magnetic ferrite processing, in particular to an automatic arrangement device for soft magnetic ferrite production, which comprises a base, the surface of the base is connected with a clamping block, one side of the surface of the base is provided with a clamping mechanism, and one side of the surface of the base is provided with an adsorption mechanism. According to the automatic arrangement device for soft magnetic ferrite production, through the arrangement of the clamping and conveying mechanism, automatic clamping and placing can be rapidly carried out, soft magnetic ferrites are placed in the clamping grooves, the multiple sets of clamping grooves are formed, and therefore the multiple sets of soft magnetic ferrites can be placed, and the machining efficiency after arrangement of the soft magnetic ferrites is effectively improved; and when the soft magnetic ferrite is placed in the clamping groove, the soft magnetic ferrite can be adsorbed through the adsorption mechanism, so that the soft magnetic ferrite is prevented from falling off.

The invention discloses a material receiving device for soft magnetic ferrite core production, and relates to the field of soft magnetic ferrite production and processing.The material receiving device comprises a first conveying frame and a second conveying frame distributed at the end of the first conveying frame, the second conveying frame and the first conveying frame are perpendicularly distributed, and the end of the second conveying frame abuts against the side wall of the first conveying frame; open right-angle through grooves are formed in the top of the first conveying frame and the top of the second conveying frame, and protective skirts are further fixedly arranged on the outer edges of the upper ends of the right-angle through grooves. Various soft magnetic ferrite blanks with different appearances can be automatically transferred from the first conveying belt to the second conveying belt through the transferring unit, the application range of the soft magnetic ferrite blank conveying device is wider, and the production efficiency is improved. In addition, the first conveying belt and the second conveying belt can trigger the batch discharging unit through the driving unit in the running process, the multiple soft magnetic ferrites stacked on the second conveying belt can be synchronously discharged in batches through the batch discharging unit, the discharging speed is high, and convenience is achieved.

The automatic temperature control system comprises an equipment mounting plane, a soft magnet, a permanent magnet and a deformable heat dissipation surface, the soft magnet and the equipment mounting plane are mounted in a heat conduction manner, an elastic body and the deformable heat dissipation surface are arranged between the permanent magnet and the soft magnet, the automatic temperature control system has an unfolded state and a folded state, and a flexible heat conduction part is mounted in the automatic temperature control system; according to the temperature of the lunar surface equipment, the magnetism of the soft magnet is changed, the elastic body is converted between a compressed state and a loosened state, and the deformable heat dissipation surface is changed from a folded state to an unfolded state in a self-adaptive manner by combining the gravity of the lunar surface, so that heat of the lunar surface equipment is transferred to the deformable heat dissipation surface to radiate and dissipate heat outwards; or the deformable heat dissipation surface is changed into a folded state from an unfolded state, the lunar surface equipment is wrapped in the deformable heat dissipation surface, and heat preservation is conducted on the equipment. The method can give consideration to the energy utilization rate and the system reliability, and plays an important role in the lunar exploration task.

According to the present invention, provided are a shaped part manufactured by sintering soft magnetic iron-based powder, and a manufacturing method thereof. According to an embodiment of the present invention, provided is a shaped part manufactured by sintering soft magnetic iron-based powder, wherein 90% or more of the soft magnetic iron-based powder has an average particle size of 150 to 400 ㎛, and 10% or less of the soft magnetic iron-based powder has an average particle size of 50 ㎛ or less. The shaped part may be a stator core of a linear motor.

The utility model discloses an anti-bubble soft magnetic ferrite core mould which comprises a mounting frame, an upper mould and a lower mould are respectively mounted on the inner side of the mounting frame, a hydraulic oil cylinder connected with the upper mould is mounted at the top of the mounting frame, a supporting plate for mounting the lower mould is arranged at the bottom of the mounting frame, and a lower mould is mounted on the supporting plate. A damping spring abutting against the bottom of the supporting plate is mounted at the bottom of the mounting frame, a vibrator is mounted at the bottom of the supporting plate, and supporting strips for supporting the supporting plate are arranged on the inner side of the mounting frame. The device is simple in structure, the hydraulic oil cylinder drives the upper mold to move downwards for mold closing, the vibrator vibrates the lower mold on the supporting plate, after the mold is filled with magnetic powder, the interior of the magnetic powder is fully compacted, bubbles generated in the manufacturing process are pressed out, and the damping spring plays a role in preventing the vibration amplitude from being too large; magnetic core raw material liquid in the mold is prevented from flowing out, the production efficiency and the production quality of the soft magnetic ferrite magnetic core are guaranteed, and batch production is facilitated.

The utility model discloses a plastic steel energy-saving ultra-silence door and window structure which comprises a door and window structure body, sound absorption filling cotton and a soft magnet strip, the sound absorption filling cotton is arranged in hole channels in the bottoms of two sliding rails located in the door and window structure body, and sliding rail parts are arranged on the two sides of the top of the door and window structure body. Two pulley contact protruding strips are arranged on the surface of the sliding rail part, and the bottom of the soft magnet strip is connected and fixed in the connecting groove. The sliding rail is reasonable in structural design, the sliding rail bottom hole channels are formed and filled with the sound absorption filling cotton, the pushing and moving vibration strength of doors and windows is buffered, meanwhile, the sound absorption and noise reduction effects are achieved, the effect of ultra-silence doors and windows is achieved, the soft magnet strip is arranged between the two sliding rail parts, and the sound absorption and noise reduction effects are achieved. Metal powder generated by friction can be magnetically attracted and concentrated, and powder accumulation is avoided.

The application relates to a mechanism for field decelerator storage and a storage method thereof, which comprises a cross beam frame I fixedly installed at a certain height from the ground in a warehouse, a plurality of bottomless box bodies are arranged on the cross beam frame I at intervals, a box bottom plate can place a decelerator, a lifting frame II has a bearing plate and a lifting mechanism, the lifting mechanism can lift the bearing plate and the decelerator and then buckle the bearing plate and the decelerator with the bottomless box body, a ring of sealing air bags is arranged at the buckling position of the box bottom plate and the edge of the bottomless box body, and a ring of soft magnets capable of magnetization and demagnetization is arranged in the cavity of the sealing air bags. The application has the advantages of adjustable sealing position, good sealing effect, increased storage time of the decelerator and the like.

The invention relates to the field of soft magnetic ferrite core processing, in particular to a grinding device for soft magnetic ferrite core production. According to an existing soft magnetic ferrite core grinding device, when magnetic cores of different specifications are ground, a grinding jig needs to be detached for adjustment, the process is tedious and time-consuming, in the magnetic core grinding process, chippings generated in the process are inconvenient to clean and collect, the iron core grinding quality is affected, dust pollution is caused, and the health of workers is harmed. A grinding device for soft magnetic ferrite core production comprises a supporting frame and the like. A box body is fixedly connected to the supporting frame, and a servo motor is fixedly connected to the box body. The servo motor can drive the four movable frames to jointly support and limit a machined part, the grinding roller can grind the surface of the machined part, the position of the grinding roller can be adjusted, and therefore soft magnetic ferrite iron cores of different specifications can be ground, and the equipment is wider in applicability.

The application discloses a three-dimensional magnetic suspension structure of diamagnetic particles, comprising: permanent magnets, conical soft magnets, diamagnetic particles and non-magnetic supports; the permanent magnets are three pairs of permanent magnets installed in x, y and z orthogonal directions, wherein the magnetic pole directions of only two pairs of the permanent magnets are the same; the conical soft magnets are three pairs of conical soft magnets, which have large end faces and small end faces, the large end faces are connected with the one end of the permanent magnets which are towards the center, and the small end faces are towards the center of the three-dimensional magnetic suspension structure; the diamagnetic particles are suspended in the center of the magnetic suspension structure formed by the permanent magnets and the soft magnets; and the non-magnetic supports are used for fixing and installing the permanent magnets and the soft magnets. The application makes full use of the advantages of the permanent magnetic suspension, such as passive, low noise and strong environmental adaptability, and is compatible with a large particle size range and high magnetic trap stiffness; the application has the characteristics of non-directional suspension, and greatly widens the application of the diamagnetic particle magnetic suspension structure in the fields of mobile and rotating platforms.

The utility model relates to the technical field of power distribution cabinets, and discloses a high-low voltage power distribution cabinet convenient to overhaul, which comprises a power distribution cabinet body and a cabinet door, a fixing frame is fixedly arranged in the power distribution cabinet body, and a first fixing rod and a second fixing rod are fixedly arranged in the fixing frame. A first groove is formed in the face, away from the power distribution cabinet body, of the first fixing rod, and a sliding rod is fixedly installed in the first groove. According to the high-low voltage power distribution cabinet convenient to overhaul, through cooperation of the first soft magnet and the second soft magnet, the cabinet door and the power distribution cabinet body are connected more tightly, and in a humid environment, it is avoided that humid air enters the power distribution cabinet body through the joint of the cabinet door and the power distribution cabinet body, electrical elements are damaged, and overall normal use is affected; and through the design of the multiple guide grooves and the second threaded holes, the distance between the adjacent mounting plates can be adjusted conveniently, electrical elements of different sizes can be mounted conveniently, and adaptability is high.

The utility model discloses a kind of intelligent processing equipment with fire extinguishing function, including equipment shell and temperature-sensitive soft magnet, the water tank is fixedly connected on the side of equipment shell upper surface.The intelligent processing equipment with fire extinguishing function is set through water tank, permanent magnet and temperature-sensitive soft magnet, pull ring drives pole to overturn, to drive valve rotation and close, permanent magnet and temperature-sensitive soft magnet mutually adsorb, at this time tension spring is stretched deformation, after water is added in water tank, processing main body in equipment shell is operated to workpiece, once accidental fire appears inside equipment shell, the high temperature of combustion can increase temperature-sensitive soft magnet surface temperature, along with the increase of temperature until temperature-sensitive soft magnet loses magnetism, make permanent magnet separate after springback, drive ejector rod to make pull ring to drive pole, to make the valve of duct rotation, make the water in water tank inside to leave to fire, after first sealing cover is opened, the fine sand of sand storage tank flows down, with automatic fire extinguishing function.

To provide a soft-magnetic iron alloy sheet having a saturated magnetic flux density higher than that of an electromagnetic pure iron sheet without excessively increasing iron loses, a method for manufacturing the soft-magnetic iron alloy sheet, an iron core using the soft-magnetic iron alloy sheet, and a rotary electrical machine.SOLUTION: This soft-magnetic iron alloy sheet has a chemical composition containing N by 2-10% atoms, Co by 0-30% atoms, and V by 0-1.2% atoms and having a remaining part of Fe and impurities. In the thickness direction of the soft-magnetic iron alloy sheet, there are provided an outer nitrogen concentration transition region in which an N concentration on a main surface is 1-4% atoms and the N concentration increases from the main surface to the inside, a high nitrogen concentration region in which a maximum N concentration is higher than the N concentration on the main surface and less than 11% atoms, and the fluctuation range of the N concentration is within 1% atom, and an inner nitrogen concentration transition region in which a N concentration is reduced from the high nitrogen concentration region to the inside and a minimum N concentration is lower than the N concentration in the high nitrogen concentration region and 1% atom or more.SELECTED DRAWING: Figure 1

The utility model discloses a manganese-zinc soft magnetic ferrite inductance detection winding device which comprises an annular cylinder groove, an annular cover and a plurality of insulated thin copper wires. The size of the annular cylinder groove is based on the condition that the manganese-zinc soft magnetic ferrite sample ring is just arranged in the annular cylinder groove, and a plurality of insulated thin copper wires are embedded in the inner wall, the outer wall and the bottom of the annular cylinder groove at equal intervals; the annular cover is matched with the groove of the annular cylinder, and the outer diameter and the inner diameter are kept consistent; insulated thin copper wires are embedded between the inner ring and the outer ring of the annular cover at equal intervals, and correspond to the insulated thin copper wires in the groove of the annular cylinder in position, so that a closed ring can be formed by covering the annular cover; and the outer wall of the groove of the annular cylinder and the outer side of the annular cover are respectively provided with an insulating thin copper long wire which is connected with an inductance instrument to detect inductance data of the manganese-zinc soft magnetic ferrite. The sample ring is quickly arranged in the winding device to detect the inductance, so that the time and labor cost are saved, the problem of detection data errors caused by manual winding is effectively avoided, and the working efficiency is improved.

The invention belongs to the technical field of motor manufacturing, and discloses a motor punching sheet glue spraying method, which comprises the following steps: placing a motor punching sheet array on a punching sheet net disc at intervals, placing a soft magnet plate right below the punching sheet net disc, and fixing the position of the motor punching sheet on the punching sheet net disc through the magnetic force of the soft magnet plate. The method comprises the following steps: integrally placing a punching mesh disc and a soft magnet plate in a closed box to complete glue spraying, integrally placing the punching mesh disc and the soft magnet plate in a drying oven to be dried, then integrally turning over the punching mesh disc and the soft magnet plate, placing a standby punching mesh disc under the punching mesh disc, placing a standby soft magnet plate under the standby punching mesh disc, and placing the standby soft magnet plate under the standby punching mesh disc. And the soft magnet plate is moved upwards, so that the motor punching sheet adsorbed by the magnetic force below the punching sheet net disc falls onto the standby punching sheet net disc and is fixed by the magnetic force of the standby soft magnet plate, and the standby punching sheet net disc and the standby soft magnet plate are used for replacing the punching sheet net disc and the soft magnet plate to finish glue spraying and drying of the other surface of the motor punching sheet. The motor punching sheet turning machine can complete overall turning of motor punching sheets in batches and is high in production efficiency.

The invention discloses anti-interference NFC label equipment. The anti-interference NFC label equipment comprises a PVC panel layer, a chip function layer, an anti-metal interference panel layer and a soft magnet panel layer which are sequentially laminated from top to bottom, the PVC panel is provided with a two-dimensional code area and an NFC induction area. The anti-metal interference panel is used for resisting electromagnetic interference generated by surrounding metal equipment and structures; the soft magnet panel layer is made of soft magnets and used for being attracted to the surface of an iron object. According to the NFC processing method, on the basis of the current NFC technology, the problem of calling the app to execute the preset operation in different NFC scenes is optimized, so that non-contact point-to-point data transmission non-sensitive operation can still be performed in multiple scenes such as opening the app, running the app in the background and not running the app in the background, and page jumping or preset action execution is realized.

The present application relates to the technical field of soft magnetic ferrite production, and discloses a magnetic grinding mud recovery device, which comprises a sewage pool and a rack, a roller is arranged to rotate horizontally inside the sewage pool, a plurality of openings are formed on the surface of the roller, a closing plate is hingedly arranged at each opening, an electromagnet is arranged outside the closing plate, support plates and conductive rings are arranged on the two sides of the roller, the support plates and the conductive rings are fixedly connected with the rack, an adjusting rod is arranged on the closing plate, the adjusting rod extends to the middle of the conductive ring and the support plate, an adjusting gap is arranged above the support plate, a collecting pipe is arranged inside the roller, an opening is formed on the upper end of the collecting pipe, the opening of the collecting pipe is connected with the opening of the closing plate when the closing plate is opened downward, a conveying mechanism for conveying the grinding mud is arranged inside the collecting pipe, and a driving mechanism for driving the roller to rotate is arranged on the rack. The present application can more conveniently recover the magnetic grinding mud.

The utility model relates to a kind of soft magnetic ferrite core processing device, involve magnetic core processing technical field, including box, multiple placing plates are fixedly installed in the box inner wall transversely, two the placing plates of adjacent are fixedly connected by connecting plate, multiple through-slots are opened in the equal interval angle on the placing plate upper end face, sliding installation is carried out in the through-slot inner wall, and the moving block extending to the placing plate below, extruding block is fixedly installed on the moving block upper end face, pulling rod is vertically arranged below the placing plate, the pulling rod upper end is rotatably connected with moving block by the connecting rod of inclination arrangement, the box inner wall is connected with multiple pulling rod by pulling control mechanism, the box top is installed with link plate by lifting control mechanism, the link plate is installed with polishing device by elastic abutting mechanism, the utility model can process multiple magnetic cores simultaneously, and need not to carry out multiple adjustment, simplify operation.

Provided is a technique that can achieve both magnetic properties and machinability by cutting at a high level, which has been impossible with only the conventional techniques of improving the machinability by cutting using MnS or the like. A soft magnetic iron comprises a chemical composition containing, in mass %, C: less than 0.02%, Si: less than 0.05%, Mn: more than 0.03% and 0.50% or less, P: 0.002% or more and less than 0.006%, S: 0.013% or more and 0.050% or less, Al: 0.010% or less, N: 0.0010% or more and 0.0100% or less, and B: 0.0003% or more and 0.0065% or less, with a balance consisting of iron and inevitable impurities.

The utility model relates to the technical field of water cup structures used on vehicles, in particular to a magnetic fixing type drinking cup which comprises a cup body and a fixing seat, a permanent magnet and a rotating cylinder are arranged at the bottom of the cup body, and the rotating cylinder is fixedly connected with the bottom of the cup body. Soft magnets, non-magnetizers and rotating grooves are arranged on the fixed seat, the soft magnets and the non-magnetizers are annularly arranged at intervals, a permanent magnet is arranged in the middle of an annular structure formed by the soft magnets and the non-magnetizers, and the permanent magnet rotates along with the cup body to control the soft magnets to generate magnetic changes; the magnetic fixed drinking cup designed by the utility model not only can be adsorbed on a metal table top and is not easy to tip over, but also can be easily taken down; the water cup is firm in fixation, convenient to take and use, simple to produce and manufacture, easy to popularize, not prone to tipping over compared with an existing water cup, safe and convenient, free of influence on using habits of people on the water cup, and particularly suitable for being used on vehicles and ships.

This invention relates to the field of magnetic core processing, and more particularly to a slit-cutting processing device for the production of soft magnetic ferrite cores. Existing devices easily damage fragile magnetic cores during cutting and loading, are inconvenient for continuous cutting, and after cutting, parts of different magnetic cores are easily mixed, resulting in core mismatch. The slit-cutting processing device for the production of soft magnetic ferrite cores includes a support plate, etc.; a guide rail is fixedly connected to the support plate, an electric slider is slidably connected to the guide rail, a drive motor is fixedly connected to the upper part of the electric slider, and a cutting blade is mounted on the output shaft of the drive motor. By using a buffer wheel to cushion the magnetic cores, fragile magnetic cores are less likely to be damaged before cutting. Furthermore, by using push blocks to sequentially push one magnetic core into the placement slot for cutting, continuous cutting of multiple magnetic cores is achieved, improving processing efficiency.

This invention discloses a fine-grinding device for soft magnetic ferrite cores, relating to the field of soft magnetic ferrite processing technology. The invention includes a cabinet with two symmetrically arranged fixed columns at the top. Two support platforms are fixedly mounted through the outer walls of the tops of the fixed columns. A drive mechanism is mounted on the top of each support platform. An outer grinding wheel is located at the top edge of the cabinet. An electric slide rail is mounted on the top of the inner wall of the cabinet, and a rotating mechanism is slidably mounted inside the electric slide rail. An inner grinding wheel is fixedly mounted at the output end of the rotating mechanism. This invention, through the interaction of the inner and outer grinding wheels, enables magnetic cores of different sizes to automatically complete the grinding of their inner and outer walls during revolution, avoiding the need for multiple grinding and adjustments for a single core, effectively improving the grinding efficiency of the core. Simultaneously, the negative pressure mechanism prevents grinding debris residue and adhesion, avoiding scratches caused by debris.

The application discloses a kind of 48 hours salt fog resistant microamorphous soft magnetic powder, the microamorphous soft magnetic powder is Fe-Ni-Mo-Si-B-P-C-Cr system soft magnetic powder, its surface is successively coated with SiO2 coating and corrosion inhibitor layer, and constitutes double-layer composite coating structure.The application is directed to the amorphous powder soft magnetic characteristics, adds Ni, Mo, Cr three elements on the basis of traditional Fe-Si-B amorphous soft magnet, so that the corrosion resistance of powder itself is greatly improved, the rust prevention ability of amorphous powder is significantly improved by double-layer composite coating structure, and excellent soft magnetic performance can be maintained.

The application relates to a magnetic circuit part of a relay and a relay. The magnetic circuit part of the relay comprises a yoke assembly, a moving iron core, a static iron core, a coil and a magnetic retention assembly. The yoke assembly encloses a receiving space. The magnetic retention assembly is arranged in the receiving space. The moving iron core is movably arranged in the receiving space. The static iron core is opposite to the moving iron core in the movement direction of the moving iron core. The magnetic retention assembly and the coil are stacked along the movement direction of the moving iron core. The magnetic retention assembly is used for providing a magnetic retention force when the moving iron core is located at a first position or a second position. The magnetic retention assembly comprises a soft magnet and at least two permanent magnets. The soft magnet is used for conducting magnetic lines of force between the at least two permanent magnets. The soft magnet and the permanent magnets jointly enclose a moving space around the movement direction of the moving iron core. At least part of the structure of the moving iron core is located in the moving space when the moving iron core moves to the first position. The magnetic circuit part of the relay and the relay can reduce the cost and the assembly difficulty.

The invention provides a method for testing saturation flux density of a soft magnetic material, and belongs to the technical field of soft magnetic materials. Two cylindrical permanent magnets which are coaxial and magnetized in the same direction are oppositely placed to form a gap, a cylindrical uniform magnetic field area is obtained, a soft magnet to be measured is placed in the gap, a ferromagnetic sample is formed, the total magnetic dipole moment of the ferromagnetic sample is measured, the soft magnet to be measured is removed, a non-magnetic cushion block is placed in the gap, and the ferromagnetic sample is obtained. Measuring the overall magnetic dipole moment of the permanent magnet and the cushion block, subtracting the overall magnetic dipole moment of the permanent magnet and the cushion block from the total magnetic dipole moment of the ferromagnetic sample to obtain the magnetic dipole moment of the soft magnet to be measured, and dividing the magnetic dipole moment of the soft magnet to be measured by the volume to obtain the saturation flux density of the soft magnet. The test method provided by the invention is not only suitable for blocky soft magnetic materials such as cylinders, cuboids or circular ring bodies, but also suitable for saturation flux density test of magnetic powder and ribbon soft magnetic materials, and the defects of the existing method are improved.