Electromagnetic chuck

Abstract

The utility model relates to the technical field of grinding machines, in particular to an electromagnetic chuck which comprises a shell with a plurality of mounting lugs on the outer wall, a fixed disc is mounted in the shell, a plurality of magnetic conductive bars radially distributed towards the outside are mounted on the surface of the fixed disc, a ceramic panel is arranged above the fixed disc, and the ceramic panel is arranged on the outer wall of the shell. The ceramic panel is provided with bar penetrating holes for the magnetic conductive bars to be inserted therein, a plurality of through holes are formed in the positions, close to the edge, of the ceramic panel, fixing bolts are inserted into the through holes, and the ceramic panel is fixedly connected with the shell through the fixing bolts. According to the electromagnetic chuck, the abrasive resistance of the surface of the chuck is greatly improved while the strong adsorption capacity is achieved, the problem that a workbench is frequently trimmed due to surface abrasion is effectively avoided, and a feasible solution is provided for improving the machining precision of a grinding machine, improving the production efficiency and reducing the operation cost of an enterprise; the method has important practical significance and wide application prospects.

Description

Technical Field

[0001] This utility model relates to the field of grinding machine technology, specifically to an electromagnetic chuck. Background Technology

[0002] Electromagnetic chucks used on grinding machines primarily utilize electromagnetic force to attract and fix workpieces. Their working principle involves generating a magnetic field through an energized electromagnetic coil, which in turn magnetizes the chuck surface, firmly adhering ferromagnetic workpieces to it. During grinding, stable and reliable clamping is crucial for ensuring workpiece machining accuracy and surface quality. Traditional grinding machine electromagnetic chucks typically use metal panels. Over long-term use, metal panels are prone to wear. Once the chuck surface wears down, the workpiece becomes unevenly adhered, affecting machining accuracy and making it difficult to achieve high-precision quality. Frequent wear also necessitates frequent table maintenance, consuming significant manpower and resources, extending equipment downtime, severely impacting grinding machine efficiency, and increasing production costs for the company. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an electromagnetic chuck that solves the technical problem of easy wear on the surface of existing electromagnetic chucks.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an electromagnetic chuck, comprising a shell with multiple mounting ears on its outer wall, a fixing plate installed inside the shell, multiple magnetic rods radially distributed outward on the surface of the fixing plate, a ceramic panel above the fixing plate, through holes for inserting the magnetic rods on the ceramic panel, multiple through holes near the edge of the ceramic panel, and fixing bolts inserted into the through holes, the ceramic panel being fixedly connected to the shell by the fixing bolts; in the fixed state, the ceramic panel presses the fixing plate tightly into the shell.

[0005] Preferably, the outer shell has an internal receiving groove, and a stepped groove is provided inside the outer shell near the edge of the receiving groove. The inner side of the stepped groove has a plurality of equidistantly distributed positioning protrusions, and the positioning protrusions have threaded holes that are compatible with the fixing bolts.

[0006] Preferably, the fixed disk has multiple positioning notches near its edge that are adapted to the positioning protrusions, and the surface of the fixed disk has multiple threaded grooves for installing the magnetic rod.

[0007] Preferably, the bottom of the magnetic rod is provided with an external thread that matches the threaded groove, and the top of the magnetic rod is provided with an internal angle groove.

[0008] Preferably, an isolation ring is fixed to the bottom of the fixed disk, and the isolation ring is located in the receiving groove.

[0009] Preferably, the outer wall of the outer shell is provided with a first threading hole, and the outer wall of the isolation ring is provided with a second threading hole, and the first threading hole and the second threading hole are axially corresponding.

[0010] Preferably, the bottom of the ceramic panel is provided with a positioning groove that matches the positioning protrusion near the through hole.

[0011] Preferably, the bottom of the ceramic panel is fitted with a sealing ring located in the stepped groove.

[0012] Preferably, the top of the magnetic rod is flush with the surface of the ceramic panel.

[0013] By employing the above technical solution, this utility model provides an electromagnetic chuck, which has at least the following beneficial effects:

[0014] 1. This electromagnetic chuck innovatively replaces the metal panel with a ceramic panel, and drills holes in the ceramic panel, placing magnetic rods inside the holes. Due to the high hardness of ceramic material, its wear resistance is significantly enhanced compared to traditional metal panels. Furthermore, by strategically placing the magnetic rods on the ceramic panel, magnetism can be effectively conducted to the ceramic panel surface, allowing the electromagnetic chuck to firmly hold the workpiece. This improvement not only gives the grinding machine electromagnetic chuck strong adsorption capacity but also greatly enhances the wear resistance of the chuck surface, effectively avoiding the problem of frequent worktable dressing due to surface wear. It provides a practical solution for improving grinding machine processing accuracy, increasing production efficiency, and reducing enterprise operating costs, and has significant practical significance and broad application prospects.

[0015] 2. This electromagnetic chuck, through the combined use of positioning protrusions, positioning notches, and positioning grooves, can achieve the installation and positioning of the fixed plate and ceramic panel, thereby improving assembly efficiency.

[0016] 3. This electromagnetic chuck has the advantage of easy replacement because the magnetic rod is connected to the fixed plate by the external thread at the bottom. When a single magnetic rod is damaged, it can be removed with a wrench through the inner corner groove at the top. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0018] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0019] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0020] Figure 3This is a schematic diagram of the internal structure of the outer shell of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the bottom of the fixed plate of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the fixed disk surface of this utility model;

[0023] Figure 6 This is a schematic diagram of the bottom structure of the ceramic panel of this utility model;

[0024] Figure 7 This is a schematic diagram of the structure of the magnetic rod of this utility model.

[0025] Figure label:

[0026] 1. Outer shell; 101. Receiving groove; 102. Step groove; 103. Positioning protrusion; 1031. Threaded hole; 104. Wire hole one; 2. Fixing plate; 201. Positioning notch; 202. Threaded groove; 3. Isolation ring; 301. Wire hole two; 4. Magnetic rod; 401. External thread; 402. Internal angle groove; 5. Ceramic panel; 501. Rod hole; 502. Positioning groove; 503. Through hole; 6. Fixing bolt; 7. Sealing ring; 8. Mounting ear. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] In the field of machining, grinding machines are widely used precision machining equipment for surface grinding, profile grinding, and other processing operations on various metal and non-metal materials. Electromagnetic chucks, as important workpiece clamping components on grinding machines, play a crucial role in fixing the workpiece, ensuring machining accuracy, and improving machining efficiency.

[0029] Due to the inherent technical limitations of existing technologies, such as the ease with which the surface can wear down, please refer to... Figures 1-7This embodiment provides an electromagnetic chuck that, while possessing strong adsorption capacity, greatly improves the wear resistance of the chuck surface, effectively avoiding the problem of frequent worktable repairs due to surface wear. The electromagnetic chuck includes a housing 1 with multiple mounting ears 8 on its outer wall. A fixing plate 2 is installed inside the housing 1. Multiple magnetic rods 4 are radially distributed outwards on the surface of the fixing plate 2. A ceramic panel 5 is provided above the fixing plate 2. The ceramic panel 5 has through holes 501 for inserting the magnetic rods 4. Multiple through holes 503 are provided near the edge of the ceramic panel 5. A fixing bolt 6 is inserted into the perforation 503, and the ceramic panel 5 is fixed to the outer shell 1 by the fixing bolt 6. In the fixed state, the ceramic panel 5 presses the fixing plate 2 into the outer shell 1. The metal panel of the electromagnetic chuck is innovatively replaced with a ceramic panel 5, and a hole is drilled in the ceramic panel 5. A magnetic rod 4 is set in the hole. Due to the high hardness of the ceramic material, its wear resistance is significantly enhanced compared with the traditional metal panel. Moreover, by reasonably setting the magnetic rod 4 on the ceramic panel 5, the magnetism can be effectively conducted to the surface of the ceramic panel 5, so that the electromagnetic chuck can still firmly hold the workpiece.

[0030] When assembling the fixing plate 2 and the ceramic panel 5, in order to ensure the smooth installation of the magnetic rod 4, it is necessary to ensure that the rod hole 501 on the ceramic panel 5 is accurately aligned with the threaded groove 202 on the fixing plate 2. For this purpose, a receiving groove 101 is provided inside the outer shell 1, and a stepped groove 102 is provided inside the outer shell 1 near the edge of the receiving groove 101. Multiple equidistant positioning protrusions 103 are provided on the inner side of the stepped groove 102, and the positioning protrusions 103 are provided with threaded holes 1031 that are compatible with the fixing bolts 6. The receiving groove 101 can accommodate electromagnetic coils, etc., while the stepped groove 102 can be used to support the installation of the fixing plate 2 and the ceramic panel 5. Furthermore, the positioning protrusions 103 can provide a positioning function for the installation of the fixing plate 2 and the ceramic panel 5, so as to ensure that the fixing plate 2 and the ceramic panel 5 can be installed accurately.

[0031] Furthermore, multiple positioning notches 201 that are adapted to the positioning protrusions 103 are provided near the edge of the fixed plate 2, and multiple threaded grooves 202 for installing the magnetic rod 4 are provided on the surface of the fixed plate 2. When installing the fixed plate 2, the positioning notches 201 are aligned with the positioning protrusions 103 by means of the positioning notches 201, so that the fixed plate 2 can be accurately installed. The threaded grooves 202 facilitate the installation of the magnetic rod 4.

[0032] Since there are a large number of magnetic rods 4, some of them are prone to wear or damage during use, which affects their adsorption performance on the workpiece. To address this issue, the bottom of the magnetic rod 4 is provided with an external thread 401 that matches the threaded groove 202, and the top of the magnetic rod 4 is provided with an internal corner groove 402. The magnetic rod 4 is connected to the threaded groove 202 of the fixed plate 2 through the external thread 401, which facilitates the installation and removal of the magnetic rod 4. The magnetic rod 4 can be removed with a wrench through the internal corner groove 402 at its top, which has the advantage of replacing the magnetic rod 4 individually, and the replacement is convenient and simple.

[0033] To facilitate the isolation of the electromagnetic coil from other components, an isolation ring 3 is fixed at the bottom of the fixed plate 2, and the isolation ring 3 is located in the receiving groove 101; the electromagnetic coil can be installed inside the isolation ring 3, thus achieving the purpose of separation.

[0034] Furthermore, a wire-passing hole 104 is provided on the outer wall of the outer casing 1, and a wire-passing hole 301 is provided on the outer wall of the isolation ring 3, with the wire-passing hole 104 and the wire-passing hole 301 axially corresponding; through the setting of the wire-passing hole 104 and the wire-passing hole 301, the wire can be easily passed into the interior of the outer casing 1 and connected to the electromagnetic coil.

[0035] Furthermore, a positioning groove 502 that matches the positioning protrusion 103 is provided at the bottom of the ceramic panel 5 near the through hole 503; when installing the ceramic panel 5, the positioning groove 502 is aligned with the positioning protrusion 103 by means of the positioning groove 502, so that the ceramic panel 5 can be accurately installed.

[0036] To improve the service life of the electromagnetic chuck, a sealing ring 7 is fitted at the bottom of the ceramic panel 5, located at the stepped groove 102; the sealing ring 7 can improve dust and water resistance.

[0037] When adsorbing a workpiece, the top of the magnetic rod 4 needs to contact the bottom of the workpiece to achieve the best magnetic attraction effect. Therefore, the top of the magnetic rod 4 is made flush with the surface of the ceramic panel 5. After the workpiece is placed, the bottom surface of the workpiece directly contacts the ceramic panel 5 and the magnetic rod 4, thus achieving adsorption and fixation of the workpiece.

[0038] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic chuck comprising a housing (1) with a plurality of mounting lugs (8) on an outer wall, characterized in that: A fixing disc (2) is arranged in the shell (1), and a plurality of magnetic conducting rods (4) are arranged on the surface of the fixing disc (2) and distributed radially outward, a ceramic panel (5) is arranged above the fixing disc (2), a plurality of rod insertion holes (501) are arranged on the ceramic panel (5) and used for inserting the magnetic conducting rods (4), a plurality of through holes (503) are arranged on the ceramic panel (5) near the edges, a plurality of fixing bolts (6) are inserted into the through holes (503), and the ceramic panel (5) is fixed to the shell (1) by the fixing bolts (6); in the fixed state, the ceramic panel (5) presses the fixing disc (2) in the shell (1).

2. The electromagnetic chuck of claim 1 wherein: The shell (1) is internally provided with a containing groove (101), and the shell (1) is internally provided with a stepped groove (102) near the edge of the containing groove (101), the inner side of the stepped groove (102) is provided with a plurality of equidistantly distributed positioning protrusions (103), and the positioning protrusions (103) are provided with threaded holes (1031) matched with the fixing bolts (6).

3. The electromagnetic chuck of claim 2 wherein: The fixing disc (2) is provided with a plurality of positioning notches (201) matched with the positioning protrusions (103) near the edges, and the surface of the fixing disc (2) is provided with a plurality of threaded grooves (202) for mounting the magnetic conducting rods (4).

4. The electromagnetic chuck of claim 3 wherein: The bottom of the magnetic conducting rod (4) is provided with an external thread (401) matched with the threaded groove (202), and the top of the magnetic conducting rod (4) is provided with an internal angle groove (402).

5. The electromagnetic chuck of claim 2 wherein: The bottom of the fixing disc (2) is fixedly provided with a separation ring (3), and the separation ring (3) is arranged in the containing groove (101).

6. The electromagnetic chuck of claim 5 wherein: A first threading hole (104) is arranged on the outer wall of the shell (1), a second threading hole (301) is arranged on the outer wall of the separation ring (3), and the first threading hole (104) and the second threading hole (301) are axially corresponding.

7. The electromagnetic chuck of claim 2 wherein: The bottom of the ceramic panel (5) is provided with a positioning groove (502) matched with the positioning protrusion (103) near the through hole (503).

8. The electromagnetic chuck of claim 2 wherein: The bottom of the ceramic panel (5) is provided with a sealing ring (7) arranged in the position of the stepped groove (102).

9. The electromagnetic chuck of claim 1 wherein: The top of the magnetic conducting rod (4) is flush with the surface of the ceramic panel (5).

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