Magnetic steel processing grinder

Abstract

The utility model relates to the technical field of magnetic steel processing equipment discloses a kind of magnetic steel processing grinding machine, including grinding machine pedestal, the upper of grinding machine pedestal is provided with protective cover, the side of protective cover is equipped with controller, the bottom of protective cover is connected with workbench, strain gauge acceleration sensor is symmetrically arranged on the workbench upper surface four corners, the strain gauge acceleration sensor is electrically connected with controller, rubber shock isolation pad is arranged between grinding machine pedestal and workbench.This magnetic steel processing grinding machine, through the active damping system of the strain gauge acceleration sensor of the four corners of workbench and electromagnetic damper, realizes the real-time monitoring and dynamic cancellation of vibration, sensor real-time capture vibration signal in processing, controller drives damper to immediately generate reverse force, effectively suppress the vibration caused by high-speed rotation and cutting of grinding wheel, avoid the vibration lines or dimensional deviation on the surface of magnetic steel, compared with traditional grinding machine, the flatness and precision of processing surface are significantly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of magnetic steel processing equipment, and in particular to a magnetic steel processing grinding machine. Background Technology

[0002] In the production and processing of magnets, grinding machines are one of the essential pieces of equipment. They are mainly used to grind the surface of magnets to achieve the required dimensional accuracy and surface quality.

[0003] The existing patent document CN221792161U discloses a magnetic steel processing grinding machine. This utility model is equipped with a cleaning component. Magnets are used to attract the debris left by grinding. The motor controls the fan to rotate, blowing the debris left on the T-shaped worktable. The debris falls into the slide table, where it is collected. This facilitates cleaning, reduces the operator's steps, and improves work efficiency.

[0004] However, existing magnetic steel machining grinding machines lack effective protection against dynamic vibration interference during use. Traditional equipment mostly uses passive damping structures such as rubber pads, which can only absorb vibrations of fixed frequencies. When the grinding wheel rotates at high speed or the cutting parameters change, the damping cannot be adjusted in real time. This results in a lack of adaptive capability to dynamic vibration sources such as grinding wheel imbalance and motor resonance, which can easily cause worktable chatter and cause vibration marks on the magnetic steel surface. When faced with sudden impact vibrations such as the grinding wheel cutting into the workpiece, the response is lagging, often leading to chipping of the machined surface or dimensional deviations. At the same time, ground vibrations (such as those from workshop equipment operation) can easily be transmitted to the worktable, causing increased dimensional deviations in precision machining, making it difficult to meet the surface roughness precision requirements of high-end applications such as new energy motor magnets. Utility Model Content

[0005] The purpose of this invention is to provide a magnetic steel processing grinding machine that solves the problem mentioned in the background art that existing magnetic steel processing grinding machines lack effective protection against dynamic vibration interference during use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a magnetic steel processing grinding machine, including a grinding machine base, a protective cover is provided above the grinding machine base, a controller is installed on one side of the protective cover, a worktable is connected to the bottom end of the protective cover, and strain-type acceleration sensors are symmetrically arranged at the four corners of the upper surface of the worktable.

[0007] The strain gauge accelerometer is electrically connected to the controller. A rubber vibration isolation pad is provided between the grinding machine base and the worktable. The rubber vibration isolation pad has through holes at its four corners with embedded electromagnetic dampers. The upper and lower ends of the electromagnetic dampers are respectively connected to the worktable and the grinding machine base. The electromagnetic dampers are electrically connected to the controller.

[0008] The positioning ring has four symmetrically distributed clamping cylinders on its inner side. The transmission end of the clamping cylinder is connected to a clamping block, and the other side of the clamping block is connected to a friction block.

[0009] The positioning ring has four symmetrically distributed clamping cylinders on its inner side. The transmission end of the clamping cylinder is connected to a clamping block, and the other side of the clamping block is connected to a friction block.

[0010] The protective cover has a linear guide rail located above the positioning ring inside, and an electric slider is installed inside the linear guide rail.

[0011] The electric slider is equipped with a hydraulic telescopic cylinder at its bottom end, and a mounting plate is fixedly connected to the transmission end of the hydraulic telescopic cylinder at its bottom end.

[0012] The mounting plate has a grinding motor installed at its bottom end, and a grinding wheel is connected to the transmission end of the grinding motor at its bottom end. A collection box is installed on the outside of the protective cover.

[0013] The collection box is equipped with a vacuum fan above it, a filter plate is installed between the vacuum fan and the collection box, and a vacuum pipe is installed on one side of the collection box, extending into the interior of the protective cover.

[0014] This utility model discloses a magnetic steel processing grinding machine. Through an active vibration reduction system composed of strain gauge accelerometers and electromagnetic dampers at the four corners of the worktable, it realizes real-time monitoring and dynamic cancellation of vibration. The sensors capture vibration signals during processing in real time, and the controller drives the dampers to immediately generate a reverse force, effectively suppressing the vibration caused by the high-speed rotation of the grinding wheel and cutting, avoiding the appearance of vibration marks or dimensional deviations on the magnetic steel surface, and significantly improving the flatness and accuracy of the processed surface compared with traditional grinding machines. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the workbench of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the rubber vibration isolation pad of this utility model;

[0019] Figure 4 This is a magnified structural diagram showing a partial detail of the positioning ring of this utility model.

[0020] In the diagram: 1. Grinding machine base; 2. Protective cover; 3. Controller; 4. Worktable; 5. Strain gauge accelerometer; 6. Rubber vibration isolation pad; 7. Electromagnetic damper; 8. Protective plate; 9. Positioning ring; 10. Support boss; 11. Clamping cylinder; 12. Clamping block; 13. Friction block; 14. Linear guide rail; 15. Electric slider; 16. Hydraulic telescopic cylinder; 17. Mounting plate; 18. Grinding motor; 19. Grinding wheel; 20. Collection box; 21. Dust extraction fan; 22. Filter plate; 23. Dust extraction pipe. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0022] Please see Figures 1-3 This utility model provides a technical solution: a magnetic steel processing grinding machine, including a grinding machine base 1, a protective cover 2 is provided above the grinding machine base 1, a controller 3 is installed on one side of the protective cover 2, a worktable 4 is connected to the bottom end of the protective cover 2, and strain-type acceleration sensors 5 are symmetrically arranged at the four corners of the upper surface of the worktable 4.

[0023] The strain gauge accelerometer 5 is electrically connected to the controller 3. A rubber vibration isolation pad 6 is provided between the grinding machine base 1 and the worktable 4. The rubber vibration isolation pad 6 has through holes at its four corners and an electromagnetic damper 7 is embedded therein. The upper and lower ends of the electromagnetic damper 7 are connected to the worktable 4 and the grinding machine base 1, respectively. The electromagnetic damper 7 is electrically connected to the controller 3.

[0024] Before the grinding machine is started, the strain gauge accelerometer 5 (model CA-YD-186T) begins operation, detecting the vibration of the upper surface of the worktable 4 in real time and transmitting the data to the controller 3. The controller 3 analyzes and judges the vibration according to the preset vibration standard. If the vibration is within the normal range, the grinding machine is started; if the vibration is abnormal, an alarm is issued to prompt the operator to troubleshoot the problem. At the same time, the rubber vibration isolation pad 6 and the electromagnetic damper 7 (model ED-400) are in standby mode. During the grinding process, the strain gauge accelerometer 5 continuously monitors the vibration of the worktable 4 and feeds back the real-time data to the controller 3. When an abnormal vibration is detected, it indicates that there may be a sudden change in grinding force, workpiece imbalance, or other interference factors. The controller 3 immediately analyzes the vibration data, calculates the required damping force, and sends a corresponding current signal to the electromagnetic damper 7. The electromagnetic damper 7 generates a damping force according to the current signal, which works together with the rubber vibration isolation pad 6 to counteract the vibration, ensuring the stability of the worktable 4 and guaranteeing the grinding accuracy.

[0025] Please see Figure 1 , Figure 2 and Figure 4The outer surface of the protective cover 2 is provided with a protective plate 8. A positioning ring 9 is provided in the middle of the upper surface of the worktable 4. A support boss 10 is provided in the middle of the positioning ring 9. The support boss 10 is set at a certain angle to the positioning ring 9. Four symmetrically distributed clamping cylinders 11 are provided inside the positioning ring 9. A clamping block 12 is connected to the transmission end of the inner side of the clamping cylinder 11. A friction block 13 is connected to the other side of the clamping block 12. A linear guide rail 14 is provided inside the protective cover 2 above the positioning ring 9. An electric motor is provided inside the linear guide rail 14. The sliding block 15 is equipped with a hydraulic telescopic cylinder 16 at its bottom end. The transmission end of the hydraulic telescopic cylinder 16 is fixedly connected to a mounting plate 17. The bottom end of the mounting plate 17 is equipped with a grinding motor 18. The transmission end of the grinding motor 18 is connected to a grinding wheel 19. A collection box 20 is installed on the outside of the protective cover 2. A dust suction fan 21 is installed above the collection box 20. A filter plate 22 is installed between the dust suction fan 21 and the collection box 20. A dust suction pipe 23 is installed on one side of the collection box 20 and extends into the interior of the protective cover 2.

[0026] When using this grinding machine for magnet processing, the operator places the magnet to be processed in the positioning ring 9 in the center of the upper surface of the worktable 4, with the bottom of the magnet in contact with the support boss 10. The controller 3 (using an industrial-grade PLC, such as a Siemens S7-1200) sends an electrical signal to drive the four symmetrically distributed clamping cylinders 11 inside the positioning ring 9. The transmission end inside the clamping cylinders 11 pushes the clamping block 12 towards the center, causing the friction block 13 connected to the other side of the clamping block 12 to tightly adhere to the magnet surface. The magnet is firmly fixed by friction and mechanical pressure, preventing damage during grinding. During the grinding process, displacement occurs. Controller 3 controls the electric slider 15 to move to the starting position on the linear guide rail 14, and simultaneously controls the hydraulic telescopic cylinder 16 to extend and retract, adjusting the grinding motor 18 and grinding wheel 19 at the bottom of the mounting plate 17 to a suitable vertical height, completing the positioning of the grinding system and preparing to cope with vibrations generated during grinding. Controller 3 sends a start command to the grinding motor 18, causing the grinding motor 18 to rotate at high speed, driving the grinding wheel 19 to rotate. Simultaneously, according to the pre-set grinding path and parameters, controller 3 coordinates the lateral movement of the electric slider 15 on the linear guide rail 14 and the hydraulic extension... The vertical extension and retraction of the cylinder 16 causes the grinding wheel 19 to grind the magnet according to the planned path. During the grinding process, the abrasive grains on the surface of the grinding wheel 19 continuously cut the surface of the magnet, removing excess material and shaping the magnet. At the same time as the grinding operation begins, the controller 3 starts the dust extraction fan 21. The dust extraction fan 21 generates negative pressure, which draws the magnet dust generated during grinding inside the protective cover 2 into the collection box 20 through the dust extraction pipe 23. When the dust passes through the filter plate 22 between the dust extraction fan 21 and the collection box 20, it is intercepted and filtered. Clean air is discharged from the fan, while the dust is deposited in the collection box 20. In this configuration, subsequent cleaning is facilitated, effectively preventing dust pollution of the working environment. Because the supporting boss and the positioning ring are set at a specific angle, a guide slope is formed, and the iron filings generated during grinding can automatically slide down the slope to the edge, avoiding accumulation under the workpiece and affecting the positioning accuracy. After the magnet completes the grinding process according to the preset program, the controller 3 controls the grinding motor 18 to stop running, and the electric slider 15 and the hydraulic telescopic cylinder 16 return to their initial positions. Then, the controller 3 sends a signal to reset the clamping cylinder 11, and the clamping block 12 releases the magnet. The operator can then take out the processed magnet and complete one processing cycle.

[0027] Working Principle: When using this grinding machine for magnet processing, the operator places the magnet to be processed in the positioning ring 9 in the middle of the upper surface of the worktable 4, with the bottom of the magnet in contact with the support boss 10. The controller 3 (using an industrial-grade PLC, such as Siemens S7-1200) sends an electrical signal to drive the four symmetrically distributed clamping cylinders 11 inside the positioning ring 9. The transmission end inside the clamping cylinder 11 pushes the clamping block 12 towards the center, so that the friction block 13 connected to the other side of the clamping block 12 is tightly attached to the surface of the magnet. The magnet is firmly fixed by friction and mechanical pressure, preventing displacement during the grinding process. The controller 3 controls the electric slider 15 to move to the starting position on the linear guide rail 14, and simultaneously controls the hydraulic telescopic cylinder 16. The extension and retraction mechanism adjusts the grinding motor 18 and grinding wheel 19 at the bottom of the mounting plate 17 to a suitable vertical height, completing the positioning of the grinding system. Before the grinding machine starts, the strain gauge accelerometer 5 (model CA-YD-186T) begins operation, monitoring the vibration of the upper surface of the worktable 4 in real time and transmitting the data to the controller 3. The controller 3 analyzes and judges the vibration according to the preset vibration standard. If the vibration is within the normal range, the grinding machine is started; if the vibration is abnormal, an alarm is issued to prompt the operator to troubleshoot the problem. At the same time, the rubber vibration isolation pad 6 and the electromagnetic damper 7 (model ED-400) are in standby mode, ready to deal with the vibration generated during the grinding process. The controller 3 sends a start command to the grinding motor 18, and the grinding motor 18 runs at high speed. The grinding wheel 19 rotates, and simultaneously, according to the pre-set grinding path and parameters, the controller 3 coordinates the lateral movement of the electric slider 15 on the linear guide rail 14 and the vertical extension and retraction of the hydraulic telescopic cylinder 16, so that the grinding wheel 19 grinds the magnet according to the planned path. During the grinding process, the abrasive grains on the surface of the grinding wheel 19 continuously cut the surface of the magnet, removing excess material and achieving the processing and shaping of the magnet. During the grinding process, the strain gauge accelerometer 5 continuously monitors the vibration of the worktable 4 and feeds back the real-time data to the controller 3. When an abnormal vibration is detected, it indicates that there may be a sudden change in grinding force, workpiece imbalance or other interference factors. The controller 3 immediately analyzes the vibration data, calculates the required damping force, and sends the corresponding damping force to the electromagnetic damper 7. The electromagnetic damper 7 generates damping force based on the current signal, which works together with the rubber vibration isolation pad 6 to counteract vibration, ensuring the stability of the worktable 4 and guaranteeing grinding accuracy. Simultaneously with the start of grinding, the controller 3 activates the dust extraction fan 21. The fan 21 generates negative pressure, drawing the magnetic dust generated during grinding inside the protective cover 2 into the collection box 20 through the suction pipe 23. The dust is filtered by the filter plate 22 between the fan 21 and the collection box 20, allowing clean air to escape from the fan while the dust settles in the collection box 20 for easy cleaning, effectively preventing dust pollution of the working environment. Because the supporting boss and the positioning ring are tilted at a specific angle, forming a guide slope, the grinding chips can automatically slide down to the edge along the slope.To avoid the magnet accumulating under the workpiece and affecting positioning accuracy, after the magnet completes the grinding process according to the preset program, the controller 3 controls the grinding motor 18 to stop, the electric slider 15 and the hydraulic telescopic cylinder 16 return to their initial positions, and then the controller 3 sends a signal to reset the clamping cylinder 11, the clamping block 12 releases the magnet, and the operator can then remove the processed magnet, completing one processing cycle.

[0028] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A magnetic steel processing grinding machine, comprising a grinding machine base (1), characterized in that: A protective cover (2) is provided above the grinding machine base (1). A controller (3) is installed on one side of the protective cover (2). A worktable (4) is connected to the bottom of the protective cover (2). Strain-type acceleration sensors (5) are symmetrically arranged at the four corners of the upper surface of the worktable (4). The strain gauge accelerometer (5) is electrically connected to the controller (3). A rubber vibration isolation pad (6) is provided between the grinding machine base (1) and the worktable (4). The rubber vibration isolation pad (6) has through holes at its four corners, in which electromagnetic dampers (7) are embedded. The upper and lower ends of the electromagnetic damper (7) are connected to the worktable (4) and the grinding machine base (1) respectively. The electromagnetic damper (7) is electrically connected to the controller (3).

2. The magnetic steel processing grinding machine according to claim 1, characterized in that: The outer surface of the protective cover (2) is provided with a protective plate (8), and a positioning ring (9) is provided in the middle of the upper surface of the workbench (4). A support boss (10) is provided in the middle of the positioning ring (9), and the support boss (10) and the positioning ring (9) are set at a certain angle.

3. The magnetic steel processing grinding machine according to claim 2, characterized in that: The positioning ring (9) has four symmetrically distributed clamping cylinders (11) on its inner side. The transmission end of the clamping cylinder (11) is connected to a clamping block (12), and the other side of the clamping block (12) is connected to a friction block (13).

4. A magnetic steel processing grinding machine according to claim 2, characterized in that: The protective cover (2) is provided with a linear guide rail (14) located above the positioning ring (9) inside, and an electric slider (15) is provided inside the linear guide rail (14).

5. A magnetic steel processing grinding machine according to claim 4, characterized in that: The bottom end of the electric slider (15) is equipped with a hydraulic telescopic cylinder (16), and the transmission end of the bottom end of the hydraulic telescopic cylinder (16) is fixedly connected to a mounting plate (17).

6. A magnetic steel processing grinding machine according to claim 5, characterized in that: A grinding motor (18) is installed at the bottom of the mounting plate (17), and a grinding wheel (19) is connected to the transmission end of the bottom of the grinding motor (18). A collection box (20) is installed on the outside of the protective cover (2).

7. A magnetic steel processing grinding machine according to claim 6, characterized in that: A vacuum fan (21) is provided above the collection box (20), and a filter plate (22) is provided between the vacuum fan (21) and the collection box (20). A vacuum pipe (23) is provided on one side of the collection box (20), and the vacuum pipe (23) extends into the interior of the protective cover (2).

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