CN220873340U - Parallel U-shaped iron core is last tiling neodymium iron boron magnetic steel and takes air gap to lead magnet formula magnetic disk - Google Patents

Abstract

The parallel U-shaped iron cores are flatly paved with neodymium iron boron magnetic steel and the N.S main magnetic pole magnetic conduction plates with fixed polarity of the magnetic disk panel of the air gap magnetic conduction type magnetic disk, the transition magnetic pole strip magnetic conduction plates without fixed polarity are arranged between the N.S main magnetic pole magnetic conduction plates, and the neodymium iron boron magnetic steel sheets are respectively and vertically inserted between all the magnetic conduction plates to form a dense magnetic type uniform magnetic field magnetic circuit, so that the passing height of magnetic force lines of the magnetic disk is obviously reduced, and the magnetic disk is suitable for positioning and processing of thin precise parts. Meanwhile, neodymium iron boron plane magnetic steel and a high-band air gap magnet conductor with the same height as the plane of the magnetic steel are horizontally laid on a magnetic source parallel U-shaped iron core of the magnetic disk, so that magnetic force lines in the vertical direction are formed, and the combined magnetic force of the permanent magnets is enhanced. Under the condition of power failure of a magnetic disk, the magnetic disk is completely positioned by the permanent magnetic force generated by magnetic steel without temperature rise; different from the traditional electric control permanent magnetic disk, the electric control permanent magnetic disk is that: it can also continuously pass forward current to make electromagnetic magnetic force lines and permanent magnetic force lines mutually extrude, and can make magnetic disk produce super strong synthetic magnetic force when not large current is passed.

Description

NdFeB magnets and magnetic disks with air gaps on parallel U-shaped cores

Technical Field

The utility model relates to a NdFeB magnet paved flat on a parallel U-shaped iron core and a magnetic disk with an air gap conductive magnet, which is used as a positioning and fixing magnetic tool in the machinery manufacturing industry.

Background technique

Traditional electric controlled magnetic fixing devices or disks are divided into two categories, one is ordinary electromagnetic disks, and the other is electric controlled permanent disks. Their shortcomings are:

1. Ordinary electromagnetic disks must be continuously powered on during operation, and the temperature rises continuously. In addition, the temperature rise of each disk component varies greatly, causing uneven thermal deformation and affecting the disk positioning processing accuracy.

2. Ordinary electric-controlled permanent magnet disks have poor ability to penetrate the air gap and are not suitable for rough machining and heavy cutting operations.

Summary of the invention

The utility model, firstly, improves the density of magnetic poles and uniformity of magnetic force of magnetic disk by adding a strip transition magnetic pole conductive plate with no fixed polarity in the permanent magnetic circuit component of magnetic disk; secondly, the electromagnetic magnetic circuit component of magnetic disk continuously passes a positive maintaining current, so that the magnetic force lines of permanent magnetic disk and electromagnetic magnetic force lines are mutually squeezed, thereby the magnetic force of magnetic disk combination rises to a super strong state; thirdly, when the electromagnetic component is powered off, the magnetic force lines of NdFeB magnets in the permanent magnetic component and the NdFeB magnets in the magnetic isolation layer are flatly laid under the strip conductive plate with fixed polarity in the permanent magnetic component. The magnetic force lines of the iron boron magnets are superimposed and gathered on the workpiece being attracted, which can form a medium-strength permanent magnetic force; fourth, the electromagnetic component is continuously passed with a constant small reverse current, so that the reverse current passes through multiple groups of thin-plate transition magnetic poles and multiple groups of unidirectional neodymium iron boron magnets, forming a closure between the electromagnetic magnetic force lines and the permanent magnetic force lines, and the disk is in a demagnetized state; fifth, the electromagnetic component is continuously passed with a constant positive and reverse current, and the charging and demagnetization currents pass through the air-gap magnetic conductor in the magnetic isolation layer, which can produce a high-efficiency electromagnetic magnetization or demagnetization effect.

The utility model is realized through the following technical scheme: it comprises a permanent magnetic circuit component, an electromagnetic magnetic circuit component and a magnetic isolation layer between the two components.

The permanent magnetic circuit component, i.e. the disk panel, is composed of a fixed polarity strip outer magnetic conductive plate, a fixed polarity strip magnetic conductive plate, a non-fixed polarity strip transition magnetic pole magnetic conductive plate, and a polarity irreversible NdFeB magnet sandwiched between each magnetic conductive plate. The magnets are arranged in the same magnetic pole direction to form a short magnetic circuit constant permanent magnetic field. The electromagnetic magnetic circuit component is composed of an excitation coil and a parallel U-shaped iron core. A magnetic isolation layer is provided between the two components, which is composed of NdFeB magnets laid flat on a parallel U-shaped iron core and a magnetic conductive magnet with an air gap.

The power-off of the exciting coil current of the electromagnetic magnetic circuit component and the control of the forward and reverse currents form a medium-strong magnetic force generated by the superposition of multiple permanent magnetic circuits; the super-strong magnetic force generated by the electromagnetic plus permanent magnet and the electromagnetic magnetic lines of force generated by the reverse current are in a closed demagnetization state within the multiple series-connected neodymium iron boron magnetic lines of force.

The first is a medium-strong magnetic force working state with no temperature rise in the permanent magnetic force. At this time, the excitation coil is powered off, and multiple sets of permanent magnetic field lines are superimposed in the workpiece. It is a medium-strong magnetic force working state with pure permanent magnetic force and no temperature rise.

The second is a super-strong magnetic working state in which electromagnetic magnetic lines of force and multiple sets of permanent magnetic lines of force are totally superimposed in the workpiece. At this time, the excitation coil passes a positive current, and the directions of multiple sets of permanent magnetic circuit magnetic lines of force and electromagnetic circuit magnetic lines of force are all consistent and fully superimposed in the workpiece. This is a super-strong magnetic working state with temperature rise.

The third is the demagnetization magnetic circuit state of the disk. The magnetic source excitation coil is passed through a continuous reverse constant excitation current. The electromagnetic magnetic lines of force are closed within the magnetic lines of force of multiple groups of permanent magnetic steels. No magnetic lines of force pass through the workpiece, and the disk is in a demagnetized state.

Compared with the traditional magnetic disk, the utility model has the remarkable advantages of large magnetic force, uniform magnetism, adjustable magnetic force, safety and reliability, and realization of super-finishing operation without temperature rise.

BRIEF DESCRIPTION OF THE DRAWINGS

Figures 1 and 2 are schematic diagrams of the structure of a NdFeB magnet laid flat on a parallel U-shaped core and a magnetic disk with an air gap.

Figures 3 to 5 are schematic diagrams of the magnetic circuit.

1-Fixed polarity strip outer magnetic plate 2-Aluminum frame

3- Strip transition magnetic plate with no fixed polarity 4- Strip magnetic plate with fixed polarity

5-Excitation coil 6-Vertical polarity irreversible NdFeB magnet

7-magnetic conductor with air gap 8-small copper plate for magnetic isolation 9-parallel U-shaped iron core

10-Workpiece 11-Horizontally laid polarity irreversible NdFeB magnet

Detailed ways

Figures 1 and 2 are schematic diagrams of a magnetic disk structure with NdFeB magnets laid flat on a parallel U-shaped core and an air-gap magnetic permeable magnet, with Figure 1 being a front view and Figure 2 being a top view. Its main components are a permanent magnetic circuit component (disk panel), an electromagnetic magnetic circuit component (magnetic source) and a magnetic isolation layer in the two magnetic circuit components, which can be placed in the disk panel or the magnetic source magnetic circuit component.

The permanent magnetic circuit component, i.e., the disk panel, is composed of a strip-shaped outer magnetic conductive plate 1 with fixed polarity, a strip-shaped magnetic conductive plate 4 with fixed magnetic poles, a strip-shaped transition magnetic pole magnetic conductive plate 3 without fixed polarity, and a vertical vertical polarity irreversible changeable NdFeB magnet 6 and a small magnetic isolation copper plate 8 sandwiched between the magnetic conductive plates. They are all flat and close to each other, and the NdFeB magnet is placed inside the small magnetic isolation copper plate. The electromagnetic magnetic circuit component is composed of an excitation coil 5, a parallel U-shaped iron core 9 and an aluminum frame 2. A magnetic isolation layer is provided between the two components. The magnetic isolation layer is composed of a thin copper plate or a horizontally laid polarity irreversible changeable NdFeB magnet 11 and a magnetic conductive magnet with an air gap 7, which are laid flat at the same height and assembled together. The magnetic isolation layer plays the role of connecting and controlling the direction of the magnetic lines of force of the two magnetic circuit components.

Figure 3-5 is the schematic diagram of the magnetic circuit.

FIG3 is a schematic diagram of a permanent magnetic force superposition magnetic circuit. In the figure, the electromagnetic component is powered off, and the magnetic force lines of the NdFeB magnets in the permanent magnetic component are superimposed on the magnetic isolation layer and the magnetic force lines of the NdFeB magnets under the strip-shaped magnetic conductive plate with fixed polarity of the permanent magnetic component, and are gathered on the workpiece to be held, forming a superposition of permanent magnetic force lines in the workpiece 10, which is a medium-strong magnetic state:

Figure 4 is a diagram of the working principle of full superposition of electromagnetic force and permanent magnetic force. In the figure, the electromagnetic magnetic circuit component is passed through a positive excitation current, which is consistent with the polarity direction of the NdFeB magnet with irreversible polarity. The directions of the permanent magnetic lines of force and the electromagnetic magnetic lines of force are the same, and the three groups of magnetic lines of force are fully superimposed in the workpiece, which is a strong magnetic state.

FIG5 is a diagram of the working principle of the demagnetization state. In the diagram, the electromagnetic magnetic circuit component is passed through a reverse constant excitation current through the air-gap magnet to efficiently transmit the magnetic lines of force, so that the reverse current passes through multiple groups of strip transition magnetic poles with no fixed polarity and multiple groups of unidirectional NdFeB magnets, forming a closed electromagnetic magnetic line of force and a permanent magnetic line of force. There will be no magnetic lines of force passing through the workpiece and the total magnetic force will be zero.

Claims (4)

1. NdFeB magnets and magnetic disks with air gaps are laid flat on a parallel U-shaped core, which is characterized in that permanent magnetic circuit components are on the upper layer, electromagnetic magnetic circuit components are on the lower layer, and a magnetic isolation layer is between the two components, which are all stacked in a flat and close manner. 2. The NdFeB magnets laid flat on the parallel U-shaped core and the magnetic disk with air gap magnet according to claim 1 are characterized in that: the permanent magnetic circuit component, i.e. the disk panel, is composed of a strip-shaped magnetic conductive plate with fixed polarity, a strip-shaped transition magnetic conductive plate with no fixed polarity, and polarity irreversibly changeable NdFeB magnets sandwiched between the two magnetic conductive plates; the magnetic pole directions of the magnets sandwiched on both sides of the strip-shaped transition magnetic conductive plate with no fixed polarity are required to be the same, and the magnetic pole directions of the magnets sandwiched on both sides of the strip-shaped magnetic conductive plate with fixed polarity are required to be opposite. 3. The NdFeB magnets laid flat on parallel U-shaped cores and the magnetic disk with air gap magnetism according to claim 1 are characterized in that the electromagnetic magnetic circuit component, i.e. the magnetic source, is composed of a plurality of parallel U-shaped cores and an excitation coil sleeved on the cores. 4. The NdFeB magnets and air-gap magnetic disk paved on the parallel U-shaped core according to claim 1 are characterized in that: the magnetic isolation layer between the electromagnetic magnetic circuit component and the permanent magnetic circuit component is a polarity irreversible NdFeB planar magnet and an air-gap magnetic disk of the same height as the magnetic steel plane paved on the parallel U-shaped core, and the magnetic pole direction of the magnetic steel is the same as the direction of the magnetic field generated by the forward excitation current on the parallel U-shaped core; the magnetic isolation layer can be set in the magnetic source of the magnetic disk or in the magnetic disk panel.