A method for grinding double end face of magnetic shoe

Abstract

The application discloses a kind of magnetic shoe double-end face grinding methods, the method includes: feeding, multi-stage composite grinding, on-line detection and signal generation, compensation judgment and execution, and post-processing steps.The device includes corresponding function feeding mechanism, grinding mechanism, automatic detection mechanism, automatic compensation mechanism, ultrasonic cleaning mechanism and drying mechanism.The core of the present application is that the overall composite grinding wheel composed of outer ring resin grinding part and inner ring bronze grinding part is used to realize the continuous performance of preliminary grinding, high-precision grinding and finishing grinding;At the same time, the workpiece thickness and parallelism are directly detected in real time by using three-point pneumatic measurement layout, and the servo motor is driven to automatically compensate the grinding wheel based on the detection signal through the closed-loop control system.The present application integrates grinding, detection, compensation, cleaning and drying, and realizes high-precision and fully-automatic grinding processing of magnetic shoe.

Description

Technical Field

[0001] This invention relates to the field of magnetic material processing technology, and in particular to a method for grinding the double-end faces of magnetic tiles. Background Technology

[0002] As a core component of permanent magnet motors, the dimensional accuracy and consistency of the magnetic tiles directly determine the motor's performance and efficiency. A double-end grinding machine is a key piece of equipment for ensuring the thickness and parallelism accuracy of the magnetic tiles.

[0003] However, existing grinding technology has the following drawbacks:

[0004] First, the grinding wheel has limited performance and cannot simultaneously prevent chipping and achieve high-precision grinding. Furthermore, it requires manual intervention to adjust after wear, resulting in unstable accuracy and low efficiency.

[0005] Secondly, online inspection methods are insufficient. Traditional measurement methods are easily affected by workpiece offset, and cannot achieve synchronous and reliable feedback of thickness and parallelism, resulting in poor accuracy and low reliability of the automatic compensation system.

[0006] Furthermore, the existing production lines lack sufficient automation, with grinding, cleaning, and drying processes being scattered, resulting in high efficiency losses and risks of product collisions during the transfer process. Summary of the Invention

[0007] The purpose of this invention is to provide a method for grinding the double-end face of magnetic tiles, overcoming the shortcomings of the prior art, and achieving high-precision grinding, reliable online detection and automatic compensation, and full-process automation.

[0008] To achieve the above objectives, the solution of the present invention is: a method for grinding the double-end faces of magnetic tiles, the method comprising the following steps:

[0009] S1. Loading: The loading mechanism transports the workpiece in an orderly manner, and the guiding mechanism guides it to the grinding station;

[0010] S2, Multi-stage composite grinding:

[0011] When the workpiece passes through the grinding station, its two end faces are ground by a grinding wheel set. The grinding process includes at least the following three stages:

[0012] a) Initial grinding at the entry point: Initial grinding is performed by the grinding section of the outer ring of the grinding wheel;

[0013] b) High-precision grinding: Non-continuous high-precision grinding is performed by the bronze grinding section of the inner ring of the grinding wheel;

[0014] c) Export dressing grinding: Dressing is performed again by the resin grinding section of the outer ring of the grinding wheel;

[0015] S3. Online detection and signal generation:

[0016] At the discharge end of the grinding station, a three-point pneumatic measurement layout is used to perform real-time detection on the ground workpiece. The three-point pneumatic measurement layout consists of three pneumatic measuring instruments arranged in a triangle in space. These three pneumatic measuring instruments are used to acquire the position signal of the upper end of the workpiece, the position signal of the lower end of the workpiece, and the position signal of another measuring point on the upper end of the workpiece, respectively. The position signals of the upper and lower end faces generate detection signals corresponding to the thickness of the magnetic tile, and the position signals of the two measuring points on the upper end face generate detection signals corresponding to the parallelism of the magnetic tile.

[0017] S4. Compensation Judgment and Execution:

[0018] The detection signal generated in step S3 is transmitted to the control system and compared and logically judged in real time with the preset tolerance range;

[0019] If the detection signal is within the preset tolerance range, the workpiece is deemed qualified.

[0020] If the detected signal exceeds the preset tolerance range, a compensation signal is generated and the servo motor is driven to adjust the feed amount of the double-end grinding wheel, forming a closed-loop control to perform compensatory grinding.

[0021] S5. Post-processing: The qualified workpieces are subjected to a two-stage ultrasonic cleaning process of "pre-wash + fine wash" and then dried.

[0022] Furthermore, in step S1, the feeding mechanism includes a vibratory feeder and a feeding track. The inner wall of the vibratory feeder is lined with a wear-resistant rubber pad to prevent scratches on the workpiece. The outlet of the feeding track is provided with a guide and limiting structure to ensure uniform workpiece posture. In addition, the workpiece reaches the auxiliary wheel assembly via the feeding guide rail and then enters the guide channel.

[0023] Furthermore, in step S2, the grinding wheel is an integral composite grinding wheel with its grinding end face arranged in annular partitions; the grinding wheel includes a base, on which a resin grinding part located on the outer ring and a bronze grinding part located on the inner ring are concentrically spaced, with a chip removal groove between them. This chip removal groove is the first chip removal groove, which is used to collect the chips generated when grinding the workpiece; a number of liquid outlets are evenly distributed in the chip removal groove, which are used to continuously discharge coolant to cool the grinding wheel and the workpiece simultaneously.

[0024] Furthermore, the bronze grinding section on the grinding wheel includes a third chip removal groove, a second region, a second chip removal groove, and a first region, which are concentrically distributed from the inside to the outside. The second chip removal groove also has several liquid outlets evenly spaced within it.

[0025] Furthermore, a transition layer is provided on the substrate, and the bronze grinding part, the first chip removal groove and the resin grinding part are disposed on the transition layer.

[0026] Furthermore, the bronze grinding section accounts for 40%-45% of the total area of ​​the resin grinding section, the bronze grinding section, and the chip removal groove.

[0027] Furthermore, in step S3,

[0028] The first pneumatic measuring instrument is located above the discharge end, and its detection direction is parallel to the grinding surface of the grinding wheel and perpendicular to the workpiece conveying direction;

[0029] The second pneumatic measuring instrument is located below the discharge end, and its detection direction is perpendicular to the workpiece conveying direction;

[0030] The third pneumatic measuring instrument is located on the side of the discharge end, and its detection direction is parallel to that of the first pneumatic measuring instrument.

[0031] Furthermore, in step S4, the specific process of compensation judgment and execution includes:

[0032] The pneumatic measuring instrument detects changes in the workpiece size, causing changes in the internal air pressure; the pressure sensor senses the pressure change and converts it into an electrical signal; the signal amplifier amplifies the electrical signal and processes it into a standard analog signal; the control system receives the standard analog signal and compares and performs logical operations with it against an internally preset tolerance range.

[0033] If the signal exceeds the tolerance, the control system outputs a compensation command to the spindle servo motor; the spindle servo motor drives the grinding wheel to perform precise feed compensation according to the compensation command.

[0034] When the control system receives more than a preset number of out-of-tolerance signals consecutively, it determines that the equipment is abnormal and outputs an alarm signal.

[0035] Furthermore, in step S5, the pre-washing is a preliminary cleaning performed in an ultrasonic cleaning tank; the fine washing is achieved by using high-frequency vibrations generated by an ultrasonic nozzle to drive tiny particles in the cleaning fluid to impact the surface of the workpiece.

[0036] Furthermore, in step S5, the cleaned workpiece is sent into the drying device via a conveyor track. The workpiece first passes through the heating tube area, where the surface moisture is quickly evaporated; then it enters the strong air zone composed of hot air blowers, where the remaining moisture is completely blown away, ultimately ensuring that the surface of the workpiece is completely dry.

[0037] After adopting the above solution, the beneficial effects of the present invention are as follows:

[0038] 1. It has a high-precision and high-efficiency grinding effect:

[0039] The grinding wheel structure layout with an outer resin layer and an inner bronze layer enables three-stage grinding of the workpiece, completing the entire process from roughing to finishing and then to dressing in one operation, which protects the workpiece and ensures dimensional accuracy.

[0040] 2. Ensures long-term stability and consistency of machining accuracy:

[0041] By employing a "three-point online detection + closed-loop automatic compensation" system, the system can detect precision degradation caused by grinding wheel wear in real time and immediately correct it automatically. This allows the equipment to operate unattended for extended periods, while maintaining a high degree of consistency in the precision of each processed workpiece, significantly reducing the scrap rate.

[0042] 3. Improved the dimensions and reliability of quality control:

[0043] The three-point measurement network can not only detect thickness but also simultaneously detect parallelism, providing more comprehensive quality monitoring. Its three-dimensional layout can effectively offset the detection errors caused by workpiece offset, making the detection signal more realistic and reliable, thereby making more accurate compensation judgments.

[0044] 4. Full-process automation has been achieved, significantly improving production efficiency:

[0045] By integrating feeding, grinding, inspection, compensation, cleaning, and drying into a continuous production line, the process of transferring, waiting, and re-clamping between processes is greatly reduced, the production cycle is shortened, labor costs are reduced, and damage from bumps during transportation is avoided. Attached Figure Description

[0046] Figure 1 This is a side view of the magnetic tile double-end face grinding device of the present invention;

[0047] Figure 2 This is a perspective view of the magnetic tile double-end grinding device of the present invention;

[0048] Figure 3 This is a schematic diagram of the feed end portion of the magnetic tile double-end grinding device of the present invention;

[0049] Figure 4 This is a cross-sectional view of the magnetic tile double-end grinding device of the present invention;

[0050] Figure 5 This is a view of the discharge end of the magnetic tile double-end grinding device of the present invention;

[0051] Figure 6 This is a perspective view of the grinding wheel of the present invention (grinding end face view);

[0052] Figure 7 This is a cross-sectional view of the grinding wheel of the present invention;

[0053] Figure 8 This is a perspective view of the discharge end of the magnetic tile double-end grinding device of the present invention;

[0054] Figure 9 yes Figure 8 Enlarged view of a section at point B in the middle;

[0055] Figure 10 This is a top view of the ultrasonic cleaning mechanism of the present invention;

[0056] Figure 11 This is a side view of the ultrasonic cleaning mechanism of the present invention.

[0057] Label Explanation:

[0058] 1. Base;

[0059] 2. Feeding mechanism; 21. Feeding track; 22. Rubber pressure roller; 23. Horizontal adjustment mechanism;

[0060] 3. Guiding mechanism; 31. Upper pressure guide plate; 32. Lower pressure guide plate; 33. Guiding channel;

[0061] 4. Height adjustment mechanism; 41. Fixing plate; 42. Lead screw; 43. Handwheel; 44. Upper slider; 45. Lower slider;

[0062] 5. Grinding mechanism; 51. Grinding wheel; 511. Matrix; 512. Bronze grinding section; 5121. Third chip removal groove; 5122. Second region; 5123. Second chip removal groove; 5124. First region; 513. First chip removal groove; 514. Resin grinding section; 515. Liquid outlet; 516. Transition layer; 52. Drive mechanism;

[0063] 6. Automatic detection mechanism; 61. First pneumatic measuring instrument; 62. Second pneumatic measuring instrument; 63. Third pneumatic measuring instrument; 64. Fixed base;

[0064] 7. Automatic compensation mechanism; 8. Ultrasonic cleaning mechanism; 81. Ultrasonic cleaning water tank; 82. Ultrasonic nozzle; 9. Control system; 10. Workpiece. Detailed Implementation

[0065] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0066] This invention provides a method for grinding the double-end faces of magnetic tiles, and the grinding equipment used is, for example... Figures 1 to 11 As shown, it includes a base 1 and a feeding mechanism 2, a guiding mechanism 3, a grinding mechanism 5, an automatic detection mechanism 6 and an automatic compensation mechanism 7 disposed on the base 1, as well as an ultrasonic cleaning mechanism 8 and a drying mechanism.

[0067] The feeding mechanism 2 employs a combination of an electromagnetic pulse vibratory feeder and a feeding track 21 to achieve automatic and orderly feeding of the magnetic tile workpieces 10. The vibratory feeder is an existing design and not an improvement in this application; therefore, its specific structure is not shown in the accompanying drawings. By adjusting its pulse frequency, the electromagnetic pulse vibratory feeder can drive the hopper to generate a composite vibration combining vertical and torsional oscillations, thereby forcing the magnetic tiles to climb along the built-in spiral track and complete directional sorting. To protect the surface of the magnetic tiles from scratches, the inner wall of the vibratory feeder is lined with wear-resistant rubber pads.

[0068] like Figure 1 As shown, the magnetic tile workpiece 10, initially oriented by the vibratory feeder, enters the feeding track 21 connected to it. At the track exit, a guide and limiting structure is provided, which performs final calibration and constraint on the posture of the magnetic tile to ensure that it enters the subsequent process in a uniform and predetermined posture.

[0069] To ensure a smooth transition of material from the conveying track to the grinding guide mechanism 3, an auxiliary wheel assembly is added between the outlet of the feeding track 21 and the inlet of the guide mechanism 3. For example... Figure 3 As shown, the assembly consists of two symmetrically arranged rubber pressure rollers 22. After the magnetic tile workpiece 10 is removed from the feeding rail, it is first guided between the two rubber pressure rollers 22. The rubber material provides the necessary friction and cushioning, effectively preventing damage to the workpiece 10 that may be caused by rigid impact while guiding the magnetic tile smoothly into the guide channel 33 formed by the upper pressure guide plate 31 and the lower pressure guide plate 32. A horizontal adjustment mechanism 23 is connected to the bottom of the auxiliary wheel assembly to adjust the distance between the two rubber pressure rollers 22.

[0070] like Figure 3 and Figure 4 As shown, the guiding mechanism 3 mainly consists of an upper pressure guide plate 31 and a lower pressure guide plate 32 arranged in parallel, forming a guiding channel 33 between them. After being guided by the rubber pressure roller 22, the workpiece 10 is fed into this guiding channel 33 and is finally transported to the grinding station of the grinding mechanism 5.

[0071] This application also includes a height adjustment mechanism 4 for adjusting the height of the guide mechanism 3. For example... Figure 3 , Figure 8 and Figure 9 As shown, the mechanism includes a fixed plate 41 vertically fixed to the machine base, on which a vertical lead screw 42 is mounted. A handwheel 43 is connected to the top of the lead screw 42 for operation. An upper slider 44 and a lower slider 45, which can move along its height direction, are mounted on the lead screw 42. The two sliders are fixedly connected to the upper pressure guide plate 31 and the lower pressure guide plate 32, respectively.

[0072] A set of height adjustment mechanisms 4 is provided at both the front and rear ends of the guide plate. When it is necessary to adjust the height of the guide channel 33, the operator only needs to rotate the handwheel 43, and the upper pressure guide plate 31 and the lower pressure guide plate 32 can be driven to move synchronously in opposite directions or in opposite directions by rotating the screw 42 in the forward or reverse direction, thereby realizing the adjustment of the channel height.

[0073] In addition, to reduce friction and wear during the conveying process, the working surfaces of the upper and lower pressure guide plates 32 that contact the magnetic tile workpiece 10 are all made of polytetrafluoroethylene (PTFE). This material has a low coefficient of friction and excellent wear resistance, which not only ensures that the magnetic tile workpiece 10 passes smoothly without being scratched, but also effectively ensures that the magnetic tile maintains precise parallelism with the grinding surface of the grinding wheel 51 during its movement.

[0074] The grinding mechanism 5 includes two integral composite grinding wheels 51 symmetrically arranged on both sides of the guide channel 33 and a drive mechanism 52 for driving the grinding wheels 51 to rotate.

[0075] like Figure 5 and Figure 6 As shown, the grinding wheel 51 includes a base 511. On the inner end face of the base 511, an annular bronze grinding section 512 and a resin grinding section 514 are concentrically arranged from the inside to the outside, with the center of the base 511 as the center. This arrangement divides the inner end face of the grinding wheel 51 base 511 radially from the inlet to the outlet into the following three grinding zones:

[0076] a) Inlet grinding zone: Corresponding to the above-mentioned resin grinding section 514, the resin grinding section 514 is made of resin binder material. This area has high sharpness and low grinding resistance, which can reduce the impact force when the workpiece 10 initially contacts.

[0077] b) Fine grinding zone: Corresponding to the bronze grinding section 512 mentioned above, it uses a bronze binder material composed of Cu (80%-85%), Sn (12%-15%), and Co (3%-5%), with a hardness of 90-92 HRA. This zone has strong wear resistance and good dimensional stability, and is used to achieve high-precision dimensional control of workpiece 10;

[0078] c) Exit finishing area: Corresponding to the resin grinding section 514, the surface of the workpiece 10 that has been finely ground is slightly finished to ensure the machining accuracy of the workpiece 10.

[0079] Compared to the traditional "split grinding wheel 51 + intermediate water pan" design, the outer ring resin + inner ring bronze design of this invention can reduce the problem of manual adjustment of the intermediate water pan, and at the same time solve the problem of insufficient linear speed and weak grinding ability in the intermediate area.

[0080] A first chip removal groove 513 is provided between the bronze grinding part 512 and the resin grinding part 514. That is, the bronze grinding part 512 and the resin grinding part 514 are protruding annular protrusions, and the first chip removal groove 513 is a recessed annular groove. Several liquid outlets 515 are evenly distributed in the first chip removal groove 513.

[0081] In use, the grinding wheel 51 rotates along a concentric axis, and the workpiece 10 feeds along the edge of the grinding wheel 51. The resin grinding section 514 first grinds the workpiece 10. The resin grinding section 514 has a certain elasticity and can produce a slight yield under grinding pressure, which can reduce the impact force when the workpiece 10 initially contacts and prevent the workpiece 10 from breaking. The workpiece 10 continues to feed, and the bronze grinding section 512 then grinds the workpiece 10. The bronze grinding section 512 has good stability and can maintain its shape under huge grinding pressure. It also has good thermal conductivity and can quickly dissipate grinding heat, thereby achieving high-precision grinding of the workpiece 10 and ensuring the consistency of the size and shape of the workpiece 10. The workpiece 10 continues to feed, and the resin grinding section 514 grinds the workpiece 10 last. The workpiece 10, which has been finely ground by the bronze grinding section 512, is slightly dressed by the resin grinding section 514 and finally withdraws from the grinding wheel 51.

[0082] During the grinding process of workpiece 10, the first chip removal groove 513 can accommodate the chips generated during grinding of workpiece 10, preventing the chips from affecting the grinding accuracy. In addition, the coolant outlet 515 in the first chip removal groove 513 continuously discharges coolant, which cools the grinding wheel 51 and workpiece 10 at the same time, preventing the grinding heat from causing the grinding wheel 51 and workpiece 10 to expand, resulting in higher machining accuracy of workpiece 10.

[0083] Because the bronze grinding section 512, which is near the center of rotation, has the highest linear velocity, the workpiece 10 experiences the greatest grinding resistance. To reduce this resistance, a technical solution is adopted that reduces the contact area between the workpiece 10 and the bronze grinding section 512. For example... Figure 1 As shown, the bronze grinding section 512 includes a third chip removal groove 5121, a second region 5122, a second chip removal groove 5123, and a first region 5124. With the center of the base 511 as the center, the third chip removal groove 5121, the second region 5122, the second chip removal groove 5123, and the first region 5124 are arranged in concentric circles from the inside to the outside. The second chip removal groove 5123 has a number of liquid outlets 515 evenly spaced in it for discharging coolant.

[0084] In operation, the grinding wheel 51 rotates along a concentric axis, and the workpiece 10 feeds along the edge of the grinding wheel 51. The workpiece 10 is first ground by the resin grinding section 514, then pauses grinding at the first chip removal groove 513, then grinds at the first area 5124, then pauses grinding at the second chip removal groove 5123, then grinds at the second area 5122, then pauses grinding at the third chip removal groove 5121, then grinds at the second area 5122, then pauses grinding at the second chip removal groove 5123, then grinds at the first area 5124, then pauses grinding at the first chip removal groove 513, and finally passes through the resin grinding section 514 and exits the grinding wheel 51. This discontinuous contact grinding effectively disperses grinding heat and grinding force, improving the machining accuracy of the workpiece 10. During the grinding process of workpiece 10, the first chip removal groove 513, the second chip removal groove 5123, and the third chip removal groove 5121 not only accommodate the chips generated during grinding of workpiece 10, but also ensure that workpiece 10 is ground in a non-continuous contact manner. In addition, the coolant outlets 515 in the first chip removal groove 513 and the second chip removal groove 5123 continuously discharge coolant, which simultaneously cools the grinding wheel 51 and the workpiece 10, preventing the grinding heat from causing the grinding wheel 51 and the workpiece 10 to expand, resulting in higher machining accuracy of workpiece 10.

[0085] The substrate 511 is made of a different material than the bronze grinding part 512 and the resin grinding part 514. In order to avoid stress concentration at the junction of different materials and damage to the grinding wheel 51, a transition layer 516 is provided on the substrate 511. The bronze grinding part 512, the first chip removal groove 513 and the resin grinding part 514 are then provided on the transition layer 516.

[0086] To ensure the precision of grinding workpiece 10, the parallelism of the end face of grinding wheel 51 is less than 0.01.

[0087] The bronze grinding section 512 accounts for 40%-45% of the total area of ​​the resin grinding section 514, the bronze grinding section 512 and the chip removal groove. This ratio is the optimal ratio for grinding efficiency, chip containment and heat dissipation of the workpiece 10.

[0088] like Figure 8 and Figure 9 As shown, the automatic detection mechanism 6 includes three pneumatic measuring instruments arranged in a triangular pattern in space. Wherein:

[0089] The first pneumatic measuring instrument 61 is installed above the fixed base 64, above the discharge end. Its detection direction is parallel to the grinding surface of the grinding wheel 51 and perpendicular to the conveying direction of the workpiece 10, and is used to obtain the position signal of the upper end of the workpiece 10.

[0090] The second pneumatic measuring instrument 62 is installed below the fixed base 64, located below the discharge end, and its detection direction is perpendicular to the conveying direction of the workpiece 10. It is used to obtain the position signal of the lower end of the workpiece 10.

[0091] The third pneumatic measuring instrument 63 is installed on the side of the fixed base 64, located on the side of the discharge end. Its detection direction is parallel to that of the first pneumatic measuring instrument 61, and it is used to obtain the position signal of another measuring point on the upper end of the workpiece 10.

[0092] The position signals of the upper and lower end faces generate detection signals corresponding to the thickness of the magnetic tile, and the position signals of the two measuring points on the upper end face generate detection signals corresponding to the parallelism of the magnetic tile.

[0093] This three-point pneumatic measurement layout can eliminate the detection error caused by the workpiece 10 conveying offset, making the detection signal more real and reliable, thereby making a more accurate compensation judgment.

[0094] The automatic compensation mechanism 7 is a closed-loop position control system 9 based on detection feedback. Its core function is to adjust the feed of the grinding wheel 51 in real time and automatically according to the online detection results to compensate for the wear of the grinding wheel 51 generated during the grinding process, thereby ensuring the long-term stability of the machining accuracy.

[0095] This mechanism is electrically connected to the automatic inspection mechanism 6. The specific workflow is as follows: The pneumatic measuring instrument in the automatic inspection mechanism 6 detects the size signal of the workpiece 10, causing a change in the internal air pressure. The pressure sensor senses the pressure change and converts it into an electrical signal. The signal amplifier amplifies and processes the electrical signal into a standard analog signal. This standard analog signal is then transmitted to the PLC control system 9. The PLC compares the received signal with its internally preset tolerance range in real time and performs logical operations. If the signal is determined to be out of tolerance, the PLC immediately sends a precise compensation command to the spindle servo motor, which is the core actuator. The servo motor drives the grinding wheel 51 according to the command, generating an axial feed motion, thereby completing the automatic compensation for the wear of the grinding wheel 51.

[0096] like Figure 2 , Figure 10 and Figure 11 As shown, the ultrasonic cleaning mechanism 8 mainly includes an ultrasonic cleaning water tank 81 and an ultrasonic nozzle 82.

[0097] The cleaning process is as follows: The inspected and qualified magnetic tile workpiece 10 first enters the ultrasonic cleaning water tank 81. The tank is filled with cleaning fluid, and high-frequency vibrations are generated by the built-in transducer to perform a comprehensive preliminary cleaning (pre-wash) of the workpiece 10, removing most of the adhering substances. Then, the high-frequency vibrations generated by the ultrasonic nozzle 82 drive the microparticles in the solution to impact the surface of the workpiece 10 at high speed, thoroughly removing stubborn adhering substances without damaging the product, achieving a fine cleaning effect.

[0098] <Drying Mechanism>

[0099] The drying mechanism is used to quickly dry the cleaned magnetic tile workpiece 10 with water stains to avoid watermarks or corrosion on the surface. The drying mechanism adopts existing commercial drying equipment, and its specific structure will not be described in detail in this application.

[0100] This device employs a drying principle combining hot air and conduction. Specifically, the cleaned workpiece 10, driven by the conveyor track, first passes through a heating zone composed of heating tubes, where most of the moisture on and inside the workpiece 10 is rapidly evaporated. Subsequently, the workpiece 10 enters a strong air zone composed of a high-flow-rate hot air blower, where any remaining trace amounts of moisture on its surface are completely blown away and carried away, ultimately ensuring that the workpiece 10 is completely dry before flowing out.

[0101] The method for grinding the double-end face of magnetic tiles according to the present invention includes the following steps:

[0102] S1. Loading materials:

[0103] The feeding mechanism 2 transports the magnetic tile workpiece 10 upward in an orderly manner, and guides it precisely through the guiding mechanism 3 so that it enters the grinding station in a predetermined posture.

[0104] S2, Multi-stage composite grinding:

[0105] When the magnetic tile workpiece 10 passes through the grinding station, its two end faces are simultaneously ground by two opposing integral composite grinding wheels 51. Based on the unique radial partition structure of the grinding wheels 51, the grinding process sequentially goes through the following three stages:

[0106] a) Initial grinding at the entrance: First, the resin grinding part 514 of the outer ring of the grinding wheel 51 performs initial grinding, which utilizes its good toughness to buffer the contact impact and effectively prevent the edge of the magnetic tile from chipping.

[0107] b) High-precision grinding: Subsequently, high-precision grinding is performed by the bronze grinding part 512 of the inner ring of the grinding wheel 51. Utilizing its high wear resistance, high rigidity and excellent thermal conductivity, the dimensional accuracy and shape consistency of the magnetic tile are ensured, and grinding heat is dissipated efficiently.

[0108] c) Finishing grinding: Finally, the resin grinding section 514 on the outer ring of the grinding wheel 51 is used for finishing again to improve the final surface quality of the magnetic tile end face.

[0109] S3. Online detection and signal generation:

[0110] At the discharge end of the grinding station, a three-point pneumatic measurement layout is used to directly detect the ground magnetic tile workpiece 10 in real time. This layout consists of three pneumatic measuring instruments 63 arranged in a triangular pattern in space: a first, a second, and a third. Through measurement, the first pneumatic measuring instrument 61 acquires a first position signal from the upper surface of the magnetic tile, the second pneumatic measuring instrument 62 acquires a second position signal from the lower surface, and the third pneumatic measuring instrument 63 acquires a third position signal from another measuring point on the upper surface. The first and second position signals generate a detection signal corresponding to the thickness of the magnetic tile, and the difference between the first and third position signals generates a detection signal corresponding to the parallelism of the upper surface of the magnetic tile.

[0111] S4. Compensation Judgment and Execution:

[0112] The thickness and parallelism detection signals generated in step S3 are transmitted to the PLC control system 9. This system performs real-time comparison and logical judgment between the signals and the internally preset tolerance ranges.

[0113] If all detection signals are within the tolerance range, workpiece 10 is deemed qualified and its flow into the next process is controlled.

[0114] If any detection signal is found to be out of tolerance, a compensation signal is immediately generated and the spindle servo motor is driven to perform precise axial feed compensation and adjust the grinding position of the grinding wheel 51.

[0115] If the system detects that out-of-tolerance signals continue to appear after compensation, it determines that the equipment is abnormal and triggers an alarm signal, which is then displayed on the human-machine interface.

[0116] S5, Ultrasonic Cleaning:

[0117] The qualified magnetic tile workpiece 10 is cleaned in a two-stage process of "pre-washing + fine washing" to thoroughly remove the dust and oil residue left by grinding.

[0118] Workpiece 10 enters the ultrasonic cleaning water tank 81 via a conveyor belt. The high-frequency vibration generated in the water tank peels off and removes most of the grinding dust and oil. Subsequently, the high-frequency vibration generated by the ultrasonic nozzle 82 drives the tiny particles added to the cleaning fluid to impact the surface of workpiece 10 with high intensity, thoroughly removing the remaining stubborn deposits, thereby obtaining a clean surface.

[0119] S6. Drying treatment:

[0120] After cleaning, the workpiece 10 is fed into the drying device via a conveyor track. The workpiece 10 first passes through the heating tube area, where the surface moisture is quickly evaporated; then it enters the strong air zone composed of hot air blowers, where the remaining moisture is completely blown away, ultimately ensuring that the surface of the workpiece 10 is completely dry.

[0121] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0122] Furthermore, the directions such as front, back, left, and right mentioned in this embodiment are only for reference and do not represent the actual directions in use. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0123] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. All equivalent changes made based on the key design features of this case shall fall within the protection scope of this case.

Claims

1. A method for grinding the double-end faces of magnetic tiles, characterized in that, The method includes the following steps: S1. Loading: The loading mechanism transports the workpiece in an orderly manner, and the guiding mechanism guides it to the grinding station; S2, Multi-stage composite grinding: When the workpiece passes through the grinding station, its two end faces are ground by a grinding wheel set. The grinding process includes at least the following three stages: a) Initial grinding at the entry point: Initial grinding is performed by the grinding section of the outer ring of the grinding wheel; b) High-precision grinding: Non-continuous high-precision grinding is performed by the bronze grinding section of the inner ring of the grinding wheel; c) Export dressing grinding: Dressing is performed again by the resin grinding section of the outer ring of the grinding wheel; S3. Online detection and signal generation: At the discharge end of the grinding station, a three-point pneumatic measurement layout is used to perform real-time detection on the ground workpiece. The three-point pneumatic measurement layout consists of three pneumatic measuring instruments arranged in a triangle in space. These three pneumatic measuring instruments are used to acquire the position signal of the upper end of the workpiece, the position signal of the lower end of the workpiece, and the position signal of another measuring point on the upper end of the workpiece, respectively. The position signals of the upper and lower end faces generate detection signals corresponding to the thickness of the magnetic tile, and the position signals of the two measuring points on the upper end face generate detection signals corresponding to the parallelism of the magnetic tile. S4. Compensation Judgment and Execution: The detection signal generated in step S3 is transmitted to the control system and compared and logically judged in real time with the preset tolerance range; If the detection signal is within the preset tolerance range, the workpiece is deemed qualified. If the detected signal exceeds the preset tolerance range, a compensation signal is generated and the servo motor is driven to adjust the feed amount of the double-end grinding wheel, forming a closed-loop control to perform compensatory grinding. S5. Post-processing: The qualified workpieces are subjected to a two-stage ultrasonic cleaning process of "pre-wash + fine wash" and then dried.

2. The method for grinding the double-end face of magnetic tiles as described in claim 1, characterized in that: In step S1, the feeding mechanism includes a vibratory feeder and a feeding track. The inner wall of the vibratory feeder is lined with a wear-resistant rubber pad to prevent scratches on the workpiece. The outlet of the feeding track is equipped with a guide and limiting structure to ensure uniform workpiece posture. In addition, the workpiece reaches the auxiliary wheel assembly via the feeding guide rail and then enters the guide channel.

3. The method for grinding the double-end face of magnetic tiles as described in claim 1, characterized in that: In step S2, the grinding wheel is an integral composite grinding wheel with its grinding end face arranged in annular partitions. The grinding wheel includes a base, on which a resin grinding part located on the outer ring and a bronze grinding part located on the inner ring are concentrically spaced. A chip removal groove is provided between the two parts. This chip removal groove is the first chip removal groove and is used to collect the chips generated when grinding the workpiece. Several liquid outlets are evenly distributed in the chip removal groove. The liquid outlets are used to continuously discharge coolant to cool the grinding wheel and the workpiece simultaneously.

4. The method for grinding the double-end face of magnetic tiles as described in claim 3, characterized in that: The bronze grinding section on the grinding wheel includes a third chip removal groove, a second region, a second chip removal groove, and a first region, which are concentrically distributed from the inside to the outside. The second chip removal groove also has several liquid outlets evenly spaced within it.

5. The method for grinding the double-end face of magnetic tiles as described in claim 3, characterized in that: A transition layer is provided on the substrate, and the bronze grinding part, the first chip removal groove and the resin grinding part are disposed on the transition layer.

6. The method for grinding the double-end face of magnetic tiles as described in claim 3, characterized in that: The bronze grinding section accounts for 40%-45% of the total area of ​​the resin grinding section, the bronze grinding section, and the chip removal groove.

7. The method for grinding the double-end face of magnetic tiles as described in claim 1, characterized in that: In step S3, The first pneumatic measuring instrument is located above the discharge end, and its detection direction is parallel to the grinding surface of the grinding wheel and perpendicular to the workpiece conveying direction. The second pneumatic measuring instrument is located below the discharge end, and its detection direction is perpendicular to the workpiece conveying direction; The third pneumatic measuring instrument is located on the side of the discharge end, and its detection direction is parallel to that of the first pneumatic measuring instrument.

8. The method for grinding the double-end face of magnetic tiles as described in claim 1, characterized in that: The specific process of compensation judgment and execution in step S4 includes: The pneumatic measuring instrument detects changes in the workpiece size, causing changes in the internal air pressure; the pressure sensor senses the pressure change and converts it into an electrical signal; the signal amplifier amplifies the electrical signal and processes it into a standard analog signal; the control system receives the standard analog signal and compares and performs logical operations with it against an internally preset tolerance range. If the signal exceeds the tolerance, the control system outputs a compensation command to the spindle servo motor; the spindle servo motor drives the grinding wheel to perform precise feed compensation according to the compensation command. When the control system receives more than a preset number of out-of-tolerance signals consecutively, it determines that the equipment is abnormal and outputs an alarm signal.

9. The method for grinding the double-end face of a magnetic tile as described in claim 1, characterized in that: In step S5, the pre-washing is a preliminary cleaning performed in an ultrasonic cleaning tank; the fine washing is a process in which the high-frequency vibration generated by the ultrasonic nozzle drives tiny particles in the cleaning solution to impact the surface of the workpiece.

10. The method for grinding the double-end face of a magnetic tile as described in claim 1, characterized in that: In step S5, the cleaned workpiece is sent into the drying device via a conveyor track. The workpiece first passes through the heating tube area, where the surface moisture is quickly evaporated. Then it enters the strong air zone composed of hot air blowers, where the remaining water vapor is completely blown away, ultimately ensuring that the surface of the workpiece is completely dry.

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