Self-centering electro-permanent magnetic chuck

Abstract

The self-centering electro-permanent magnetic chuck comprises a chuck body, a plurality of electro-permanent magnetic assemblies are arranged in the chuck body, magnetic conductive blocks are arranged on the upper portion of the chuck body, the number of the magnetic conductive blocks is the same as that of the electro-permanent magnetic assemblies, the magnetic conductive blocks are arranged on the upper portion of each electro-permanent magnetic assembly, and a sliding groove is formed in each magnetic conductive block. A rack is arranged in the sliding groove, the direction of the sliding groove points to the circle center, a gear ring is further arranged on the upper portion of the chuck body, a gear is arranged in each magnetic conductive block and meshed with the rack and the gear ring, a supporting block is arranged on the upper portion of each rack, and a plurality of supporting blocks moving synchronously are arranged on the circular electric permanent magnetic chuck. The electro-permanent magnetic chuck can be used for automatically determining the circle center and quickly determining a part in the center of the electro-permanent magnetic chuck, and can ensure that the supporting blocks are arranged at equal angles and the distances between the supporting blocks and the center are the same when a sheet type workpiece is machined, so that the gravity center does not deviate to one side, and the stability during rotation is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electric permanent magnetic chucks, in particular to a self-centering electric permanent magnetic chuck. Background Art

[0002] A circular permanent magnetic chuck is a device used to hold workpieces on grinders, lathes, benchwork, and other applications. It's particularly effective when machining cylindrical or annular workpieces. The part is placed in the center of the chuck, and a roundness ruler is used to confirm its center position. The chuck then rotates the part, allowing the turning tool to mill the part.

[0003] It is not difficult to see from the above description of the processing process that there are areas for improvement in the traditional circular permanent magnetic chuck. That is, when circular parts need to be processed, the parts generally need to be placed in the middle position of the electric permanent magnetic chuck. The original method is to measure with a roundness meter. At the same time, when processing thin-sheet parts, in order to facilitate tool retraction and prevent the turning tool from contacting the chuck, it is necessary to install pads. The arrangement of the pads will also affect the stability of the chuck during rotation. If the center of gravity is not in the middle, the risk of falling off during rotation will increase. Utility Model Content

[0004] (1) Technical solution

[0005] In order to solve the above technical problems, the utility model provides a self-centering electro-permanent magnetic chuck.

[0006] The specific technical solutions are:

[0007] A self-centering electro-permanent magnetic chuck comprises a disk body, which is circular and has a plurality of electro-permanent magnetic assemblies disposed therein. The electro-permanent magnetic assemblies are used to generate magnetic poles, and the magnetic poles generated by two adjacent electro-permanent magnetic assemblies are in opposite directions. The plurality of electro-permanent magnetic assemblies are arranged in a ring at equal angles. A magnetic conductive block is disposed on the upper portion of the disk body. The number of the magnetic conductive blocks is the same as that of the electro-permanent magnetic assemblies, and each electro-permanent magnetic assembly is provided with a magnetic conductive block on the upper portion. A slide groove is disposed inside the slide groove, and a rack is disposed inside the slide groove, with the slide groove pointing to the center of the circle. A gear ring is also disposed on the upper portion of the disk body, and a gear is disposed inside each of the magnetic conductive blocks. The gears are respectively engaged with the rack and the gear ring. A support block is disposed on the upper portion of the rack. When the gear ring rotates clockwise or counterclockwise, all the racks are driven to move in a centripetal or centrifugal direction.

[0008] Furthermore, an arc groove is provided at the bottom of each magnetic conductive block, and a plurality of arc grooves form an annular channel, and the gear ring is arranged inside the annular channel.

[0009] Furthermore, the outer diameter of the annular channel is the same as the diameter of the disc body, the outer wall of the annular channel is open, the gear ring tooth groove is provided on the inner wall, and the outer wall of the gear ring is provided with a handle.

[0010] Furthermore, plane bearings are provided on both sides of the gear ring at the contact surfaces with the disk body and the magnetic conductive block.

[0011] Furthermore, a plurality of bolt holes are provided on the upper portion of the rack, and the support block is connected to the rack via bolts.

[0012] Furthermore, the support block is fan-shaped, and is provided with an arc-shaped protrusion, which is connected to the support block by bolts.

[0013] Furthermore, the electro-permanent magnet assembly includes a reversible magnet, a coil, a permanent magnet and a pole block, the coil is wound on the side of the reversible magnet, the pole block is arranged on the upper part of the reversible magnet, the permanent magnet is located on the side of the pole block, and the upper part of the pole block is arranged corresponding to the magnetic conductive block.

[0014] (2) Beneficial effects

[0015] Compared with the prior art, the present invention arranges multiple synchronously moving support blocks on a circular electro-permanent magnetic chuck. On the one hand, it can be used to automatically determine the center of the circle and quickly locate the part at the center of the electro-permanent magnetic chuck. At the same time, when processing thin-sheet workpieces, it can also ensure that each support block is set at an equal angle and at the same distance from the center, ensuring that the center of gravity will not deviate to one side and ensuring stability during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of the utility model.

[0018] Figure 2 It is a top view of the utility model.

[0019] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0020] Figure 4 Schematic diagram of the structure of the electro-permanent magnet component. DETAILED DESCRIPTION

[0021] The following is a clear and complete description of the technical solutions in the embodiments of the utility model, in conjunction with the accompanying drawings. The described embodiments are only part of the embodiments of the utility model, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making any creative efforts are within the scope of protection of the utility model.

[0022] In the relevant existing technologies, there are areas for improvement in traditional circular permanent magnetic suction cups. That is, when circular parts need to be processed, the parts generally need to be placed in the middle position of the electric permanent magnetic suction cup. The original method is to measure them using a roundness meter. At the same time, when processing thin-sheet parts, in order to facilitate tool retraction and prevent the turning tool from contacting the suction cup, it is necessary to install pads. The arrangement of the pads will also affect the stability of the suction cup during rotation. If the center of gravity is not in the middle, the risk of falling off will increase during rotation.

[0023] In order to solve the problems existing in the related prior art, the present invention proposes a self-centering electro-permanent magnetic chuck. The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0024] See also Figures 1 to 4 The utility model proposes a self-centering electro-permanent magnetic chuck, comprising a disc body 1, the disc body 1 is circular, a plurality of electro-permanent magnetic components 2 are arranged inside the disc body 1, the electro-permanent magnetic components 2 are used to generate magnetic poles, the magnetic poles generated by two adjacent electro-permanent magnetic components 2 are in opposite directions, and the plurality of electro-permanent magnetic components 2 are arranged in an equi-angled ring, a magnetic conductive block 3 is provided on the upper part of the disc body 1, the number of the magnetic conductive blocks 3 is the same as that of the electro-permanent magnetic components 2, and each electro-permanent magnetic component 2 is provided with a magnetic conductive block 3 on the upper part, each magnetic conductive block 3 is provided with a slide groove inside, a rack 4 is provided inside the slide groove, and the slide groove direction points to the circle A gear ring 5 is further provided on the upper part of the disk body 1, and a gear 6 is provided in each magnetic conductive block 3. The gear 6 is respectively engaged with the rack 4 and the gear ring 5. A support block 7 is provided on the upper part of the rack 4. When the gear ring 5 rotates clockwise or counterclockwise, it drives all the racks 4 to move in the centripetal or centrifugal direction. Specifically, when a rack 4 slides in the slide groove, it drives the gear 5 to rotate, and the rotation of the gear 5 drives the gear ring 5 to rotate. Finally, the gear ring 5 drives other racks 4 to slide in the corresponding slide groove, thereby realizing the synchronous centripetal or centrifugal movement of multiple racks 4.

[0025] Specifically, the support block 7 is fan-shaped, and an arc-shaped protrusion 10 is provided on the support block 7. The protrusion 10 is connected to the support block 7 by bolts. A plurality of bolt holes are provided on the upper portion of the rack 4, and the support block 7 and the rack 4 are connected by bolts.

[0026] When a part needs to be fixed by magnetic attraction, the part is first placed on the support block 7, and then one of the support blocks is pushed to slide in its corresponding slide groove. When one support block moves, the other support blocks 7 move synchronously under the action of the gear ring 5 and the gear 6. This allows the part to be in the middle of the disk body 1. After the protrusion 10 clamps the part, tighten the bolts connecting the support block 7 and the rack 4. In this way, the support block 7 and the rack 4 are clamped on the magnetic block 3. At this time, the rack 4 and the support block 7 are fixed, and finally magnetized and adsorbed by the electropermanent magnet component 2. At the same time, the center of the circle of multiple support blocks 7 to the disk body 1 is the same during the process. In this way, when the disk body 1 rotates, the rotation stability can be effectively improved.

[0027] Specifically, an arc groove is provided at the bottom of each magnetic block 3, and multiple arc grooves form an annular channel. The gear ring 5 is arranged inside the annular channel. In this way, the gear ring 5 is arranged in the middle position between the magnetic block 3 and the disk body 1. On the one hand, the safety of the gear ring 5 is ensured, and on the other hand, this position will not affect the placement and installation of parts.

[0028] The outer diameter of the annular channel is the same as the diameter of the disc body 1. The outer wall of the annular channel is open, and the gear ring 5 has teeth grooves on the inner wall. The outer wall of the gear ring 5 is provided with a handle 8, so that the gear ring 5 can be extended to the outside of the disc body 1 to install the handle 8. During operation, the gear ring 5 can be rotated by rotating the handle 8, and ultimately the support block 7, which is more labor-saving and convenient. In addition, flat bearings 9 are provided on both sides of the gear ring 5 at the contact surfaces with the disc body 1 and the magnetic conductive block 3. The flat bearings can reduce friction, improve the convenience of operation, and further save labor.

[0029] The electro-permanent magnet assembly 2 includes a reversible magnet 2a, a coil 2b, a permanent magnet 2c, and a pole piece 2d. The coil 2b is wound around the side of the reversible magnet 2a, the pole piece 2d is located on the top of the reversible magnet 2a, the permanent magnet 2c is located on the side of the pole piece 2d, and the top of the pole piece 2d is arranged corresponding to the magnetic conductive block 3. When magnetizing, the coil is energized, and the magnetic field generated by the coil is superimposed with the magnetic field of the magnet 2c. The magnetic field is finally transmitted to the part through the magnetic conductive block 3, the support block 7, and the protrusion 10. The magnetic poles generated by the lower parts of two adjacent magnetic conductive blocks 3 are opposite, completing the fixing of the part. When demagnetization is required, the magnetic field generated by the coil and the magnetic poles generated by the corresponding permanent magnet are ensured to cancel each other out, at which time the part is released.

[0030] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A self-centering permanent magnetic chuck, characterized by: The invention comprises a disk body (1), wherein the disk body (1) is circular, and a plurality of electro-permanent magnet components (2) are provided inside the disk body (1), wherein the electro-permanent magnet components (2) are used to generate magnetic poles, and the magnetic poles generated by two adjacent electro-permanent magnet components (2) are in opposite directions, and the plurality of electro-permanent magnet components (2) are arranged in an equiangular ring, and a magnetic conductive block (3) is provided on the upper part of the disk body (1), and the number of the magnetic conductive blocks (3) is the same as that of the electro-permanent magnet components (2), and each electro-permanent magnet component (2) is provided with the magnetic conductive block (3) on the upper part. Each of the magnetic conductive blocks (3) is provided with a slide groove inside, and a rack (4) is provided inside the slide groove, and the slide groove direction points to the center of the circle. A gear ring (5) is also provided on the upper part of the disk body (1). Each of the magnetic conductive blocks (3) is provided with a gear (6), and the gear (6) is respectively engaged with the rack (4) and the gear ring (5). A support block (7) is provided on the upper part of the rack (4). When the gear ring (5) rotates clockwise or counterclockwise, it drives all the racks (4) to move in the centripetal or centrifugal direction.

2. The self-centering electro-permanent magnetic chuck according to claim 1, characterized in that: An arcuate groove is provided at the bottom of each magnetic conductive block (3), and a plurality of arcuate grooves form an annular channel. The gear ring (5) is provided inside the annular channel.

3. The self-centering electro-permanent magnetic chuck according to claim 2, characterized in that: The outer diameter of the annular channel is the same as the diameter of the disc body (1); the outer wall of the annular channel is open; the tooth groove of the gear ring (5) is provided on the inner wall; and the outer wall of the gear ring (5) is provided with a handle (8).

4. A self-centering electro-permanent magnetic chuck according to claim 1 or 2, characterized in that: Plane bearings (9) are provided on both sides of the gear ring (5) at the contact surfaces with the disk body (1) and the magnetic conductive block (3).

5. The self-centering electro-permanent magnetic chuck according to claim 1, characterized in that: A plurality of bolt holes are provided on the upper portion of the rack (4), and the support block (7) is connected to the rack (4) via bolts.

6. The self-centering electro-permanent magnetic chuck according to claim 1, characterized in that: The support block (7) is fan-shaped, and an arc-shaped protrusion (10) is further provided on the support block (7). The protrusion (10) is connected to the support block (7) by bolts.

7. The self-centering electro-permanent magnetic chuck according to claim 1, characterized in that: The electro-permanent magnet assembly (2) comprises a reversible magnetic steel (2a), a coil (2b), a permanent magnetic steel (2c) and a pole block (2d), wherein the coil (2b) is wound around the side of the reversible magnetic steel (2a), the pole block (2d) is arranged on the upper part of the reversible magnetic steel (2a), the permanent magnetic steel (2c) is located on the side of the pole block (2d), and the upper part of the pole block (2d) is arranged corresponding to the magnetic conductive block (3).

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