Modular and high-precision electromagnetic clamp

Abstract

The utility model relates to precise machining machinery technical field especially is involved in a kind of modularization and high-precision electromagnetic clamp, including grinder and supporting plate, the supporting plate is fixedly installed on grinder, motor is also fixedly installed on grinder, the output of motor is fixedly installed with main shaft, the inside of main shaft is embedded with magnetic ring along the axis direction, three axial supporting blocks for axial positioning are also fixedly arranged on the supporting plate, the inside of axial supporting block is located with the bearing sleeve ring corresponding to the axial position of magnetic ring. The bearing sleeve ring set by the utility model is positioned by three supporting blocks on supporting plate end face three points, the structure is simple, clamping is convenient, it is favorable to improve machining accuracy and efficiency. The magnetic ring can generate a stable magnetic field after energization, the magnetic field is enough to attract and fix workpiece, and keep a small and stable gap with the surface of magnetic ring, for example 1-3mm.

Description

Technical Field

[0001] This utility model relates to the field of precision machining technology, and in particular to a modular and high-precision electromagnetic clamp. Background Technology

[0002] In the field of machining, especially in the precision grinding of ring-shaped parts such as bearing rings, stable, rapid, and precise workpiece clamping is crucial to ensuring machining quality and efficiency. Magnetic clamps are widely used due to their advantages such as ease of operation, strong clamping force, and no damage to the workpiece surface. Their principle is based on the strong attraction force generated by a magnetic field on a ferromagnetic workpiece, achieving workpiece positioning and clamping.

[0003] However, existing magnetic clamps still have some shortcomings in practical applications:

[0004] Inadequate structural design: The magnetic circuit design of traditional fixtures may not be optimized enough, resulting in uneven distribution of magnetic lines of force and concentration of clamping force in local areas, which affects the overall stability of clamping. Especially when subjected to large machining forces, it may cause slight displacement of the workpiece, affecting the final machining accuracy.

[0005] Assembly and adjustment are complex: The assembly relationship between the components of the existing fixture may be cumbersome. When changing workpieces of different specifications, a lot of time is required for adjustment and calibration, which reduces the flexibility and production efficiency of the production line.

[0006] Poor adaptability and versatility: Many fixtures are designed for workpieces of specific sizes and shapes. When workpiece specifications change, it is often necessary to replace the entire set of fixtures, which leads to increased equipment and management costs.

[0007] Insufficient accuracy retention: The accuracy of the fixture's reference and positioning surfaces directly affects the workpiece clamping accuracy. Traditional structures may experience a decrease in accuracy due to long-term use or deformation under stress, making it difficult to meet increasingly stringent precision machining requirements.

[0008] Therefore, the market urgently needs a magnetic clamp with a more scientific structural design, more optimized magnetic circuit, more convenient assembly, and greater adaptability to meet the demands of modern manufacturing for high-precision and high-efficiency production. Summary of the Invention

[0009] The purpose of this invention is to provide a modular and high-precision electromagnetic clamp to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, this utility model provides the following technical solution: a modular and high-precision electromagnetic clamp, comprising a grinding machine and a support plate, wherein the support plate is fixedly mounted on the grinding machine, a motor is also fixedly mounted on the grinding machine, a spindle is fixedly mounted on the output end of the motor, a magnetic ring is embedded inside the spindle along the axial direction, and three axial support blocks for axial positioning are also fixedly arranged on the support plate, wherein bearing rings corresponding to the axial positions of the magnetic rings are fitted and positioned on the inner side of the axial support blocks.

[0011] Preferably, the support plate has a machining hole inside, a grinding wheel passes through the machining hole, and a radial support block for radially positioning the workpiece is installed on the support plate.

[0012] Preferably, the magnetic ring is composed of a toroidal iron core and an excitation coil, and the input end of the magnetic ring is connected to a DC control power supply.

[0013] Preferably, the DC control power supply is an adjustable voltage power supply, used to adjust the magnetic force of the magnetic ring.

[0014] Preferably, the bearing ring and the magnetic ring maintain a gap of 1-3 mm throughout the grinding process.

[0015] Preferably, the axial support block can be adapted to bearing rings of different sizes by replacing support blocks of different lengths.

[0016] Preferably, the working surface of the axial support block on the support plate that contacts the workpiece is made of tungsten steel.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention improves machining accuracy by more than 30%, avoids problems caused by wear of magnetic end face, effectively reduces micro-vibrations caused by contact friction and collision, makes workpiece rotation more stable and coaxiality higher, thereby obtaining higher dimensional accuracy, shape accuracy and better surface roughness.

[0019] The system reliability is improved by 45%. The main wear within the system is caused by the wear of the grinding wheel against the fixture block and the inner raceway of the workpiece during the process. By effectively controlling the wear of the grinding wheel, the maintenance frequency is reduced, ensuring the stable operation of the grinding machine and extending its service life.

[0020] Quick changeover is achieved through convenient assembly and adjustment. By simply changing different support blocks, it can accommodate the production of workpieces of various specifications, minimizing non-production time and reducing production costs by 40%.

[0021] From the perspective of industrial application feasibility, this fixture has a simple structure, clearly defined component functions, and is easy to standardize in production and maintenance. Furthermore, this structure can be directly modified from existing grinding machines, making it highly adaptable. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is an overall structural view of the present invention;

[0024] Figure 2 This is a schematic diagram of the motor output terminal structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the support plate of this utility model;

[0026] Figure 4 This is a schematic diagram of the connection between the bearing ring and the axial support block and the radial support block of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Grinding machine; 2. Spindle; 3. Motor; 4. Magnetic ring; 5. Grinding wheel; 6. Bearing ring; 7. Support plate; 8. Axial support block; 9. Radial support block. Detailed Implementation

[0029] 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.

[0030] This utility model provides a technical solution:

[0031] Please see Figures 1 to 4A modular and high-precision electromagnetic clamp includes a grinding machine 1 and a support plate 7. The support plate 7 is fixedly mounted on the grinding machine 1. A motor 3 is also fixedly mounted on the grinding machine 1. A spindle 2 is fixedly mounted at the output end of the motor 3. A magnetic ring 4 is embedded inside the spindle 2 along the axial direction. Three axial support blocks 8 for axial positioning are also fixedly arranged on the support plate 7. A bearing ring 6 corresponding to the axial position of the magnetic ring 4 is fitted and positioned on the inner side of the axial support block 8. A machining hole is opened inside the support plate 7. A grinding wheel 5 passes through the machining hole. The power input end of the grinding wheel 5 is connected to a grinding wheel frame and a drive device. The grinding wheel frame and the drive device are mounted on the grinding machine 1. A radial support block 9 for radial positioning of the workpiece is installed on the support plate 7. The axial support blocks 8 can be replaced with support blocks of different lengths to accommodate bearing rings 6 of different sizes. The working surface of the axial support blocks 8 on the support plate 7 that contacts the workpiece is made of tungsten steel.

[0032] The magnetic ring 4 is composed of a toroidal iron core and an excitation coil. The input end of the magnetic ring 4 is connected to a DC control power supply, which is an adjustable voltage power supply used to adjust the magnetic force of the magnetic ring 4. The bearing ring 6 and the magnetic ring 4 maintain a gap of 1-3mm throughout the grinding process.

[0033] By adopting the above technical solution, the bearing grinding system mainly consists of a drive section, a clamping and rotating section, a machining section, and a support section. The drive section is a motor 3, whose output shaft is connected to the spindle 2 to provide rotational power to the system. The machining section is a grinding wheel 5, mounted on the grinding wheel holder of the grinding machine 1, used for grinding the workpiece. The support section includes a support plate 7 and support blocks, used to maintain the positioning and stability of the workpiece. The bearing race 6 is positioned at three points on its end face by three support blocks on the support plate 7. This structure is simple, convenient to clamp, and conducive to improving machining accuracy and efficiency. After being energized, the magnetic ring 4 can generate a stable magnetic field, which is sufficient to attract and fix the workpiece, and maintain a small and stable gap of 1-3mm between the workpiece and the surface of the magnetic ring 4. At the same time, the magnetic coil rotates 180° clockwise around the spindle 2 of the grinding machine 1. The rotating magnetic field drives the suspended workpiece to rotate synchronously through the magnetic torque, thus starting the grinding process of the inner raceway of the workpiece.

[0034] Working principle: Loading and positioning: Place the bearing ring 6 to be processed in front of the spindle 2. At this time, the axial support block 8 and radial support block 9 on the support plate 7 can be used for preliminary axial and radial positioning to ensure that the workpiece is located at the center of rotation.

[0035] Magnetic levitation: When the control system is activated, a precisely controlled current is supplied to the electromagnetic coil of the magnetic ring 4. The magnetic ring 4 generates a strong axial magnetic field, which attracts the bearing ring 6 and makes it stable on the axial support block 8 on the support plate 7 and the original axial support block 8 of the grinding machine 1, forming a gap of about 2mm between the magnetic ring 4 and the surface of the magnetic ring 4.

[0036] Unloading: After grinding is completed, the grinding wheel 5 retracts. It should be noted that the grinding wheel 5 is driven by the bearing processing drive equipment, which drives the grinding wheel 5 to grind the bearing ring 6 through the machining hole. The motor 3 stops, the current to the magnetic ring 4 is cut off, the magnetic field disappears, and the bearing ring 6 is released from the suspended state under the action of gravity, and can be removed by a robot or manually.

[0037] By organically combining motor drive, magnetic levitation, synchronous rotation, and precision grinding, a complete, efficient, and high-precision bearing processing system is formed.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A modular and high-precision electromagnetic clamp, comprising a grinding machine (1) and a support plate (7), wherein the support plate (7) is fixedly mounted on the grinding machine (1), characterized in that: The grinding machine (1) is also fixedly installed with a motor (3), and a spindle (2) is fixedly installed at the output end of the motor (3). A magnetic ring (4) is embedded in the spindle (2) along the axial direction. Three axial support blocks (8) for axial positioning are also fixedly installed on the support plate (7). A bearing ring (6) corresponding to the axial position of the magnetic ring (4) is fitted and positioned on the inner side of the axial support block (8).

2. The modular and high-precision electromagnetic clamp according to claim 1, characterized in that: The support plate (7) has a machining hole inside, and a grinding wheel (5) passes through the machining hole. A radial support block (9) for radially positioning the workpiece is installed on the support plate (7).

3. The modular and high-precision electromagnetic clamp according to claim 1, characterized in that: The magnetic ring (4) is composed of a toroidal iron core and an excitation coil, and the input end of the magnetic ring (4) is connected to a DC control power supply.

4. A modular and high-precision electromagnetic clamp according to claim 3, characterized in that: The DC control power supply is an adjustable voltage power supply, used to adjust the magnetic force of the magnetic ring (4).

5. A modular and high-precision electromagnetic clamp according to claim 4, characterized in that: The bearing ring (6) and the magnetic ring (4) maintain a distance of 1-3 mm throughout the grinding process.

6. A modular and high-precision electromagnetic clamp according to claim 5, characterized in that: The axial support block (8) can be adapted to bearing rings (6) of different sizes by replacing support blocks of different lengths.

7. A modular and high-precision electromagnetic clamp according to claim 1, characterized in that: The working surface of the axial support block (8) on the support plate (7) that contacts the workpiece is made of tungsten steel.

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