A workpiece grinding machine with automatic correction

Abstract

This invention relates to the field of grinding machine technology, specifically to an automatically correcting workpiece grinding machine. The invention includes a base, with an XY dual-axis linkage machining center and a side frame fixedly connected to the top of the base. A grinding wheel body is rotatably connected to one end of the side frame, and a pressure sensor is installed at the shaft end of the grinding wheel body. A laser rangefinder for detecting changes in the diameter of the grinding wheel body is fixedly connected to one end of the side frame. This invention, through the combined use of the pressure sensor and the laser rangefinder, can set up a dual-stage correction mechanism of active and passive dressing according to different states of rough and fine grinding. Before processing, the controller drives the motor to adjust the diamond dresser according to the preset feed amount for the corresponding stage. The sliding resistor provides displacement feedback, quickly matching the grinding wheel cutting edge requirements. Then, during processing, when the grinding wheel is determined to be dull, the workpiece feed is paused, and the corresponding dressing action is repeated. This avoids frequent shutdowns and prevents excessive wear of the grinding wheel, effectively improving the processing efficiency and applicability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of grinding technology, specifically to an automatically correcting workpiece grinding machine. Background Technology

[0002] In the field of mechanical manufacturing, grinding machines are core equipment for the precision machining of cylindrical workpieces, and their machining quality and efficiency directly determine the performance stability of downstream products. With the continuous improvement of workpiece precision requirements in industries such as automotive, aerospace, and precision hydraulics, grinding machines need to be adapted to simultaneously maintain a high sharpness of the grinding wheel in the rough grinding stage to quickly remove machining allowances, and require a smooth cutting edge of the grinding wheel in the fine grinding stage to avoid over-cutting or scratching the workpiece surface. This places higher demands on the dynamic adaptability of the grinding wheel's condition.

[0003] To meet basic grinding needs, existing grinding machines have gradually incorporated some automation features. These include motor-driven grinding wheel rotation and pneumatic chucks for workpiece clamping. Some high-end models are also equipped with a single sensor to monitor grinding pressure and help determine if wheel dressing is necessary. Regarding wheel dressing, traditional solutions often use a fixed feed rate mode, meaning dressing parameters are preset based on experience, and the dresser is driven to dress the outer circumference of the grinding wheel according to the same standard regardless of the stage. For handling abnormalities, most grinding machines rely on manual inspection. When operators observe that the workpiece surface roughness exceeds tolerance or grinding efficiency decreases, they stop the machine and clean debris from the grinding wheel gap with a brush, or manually adjust the dressing parameters.

[0004] However, existing technologies still have the problem that fixed dressing parameters cannot be adapted to multiple scenarios. For example, when coarsely grinding materials, a fixed small feed rate causes the grinding wheel to become dull quickly, requiring frequent machine stops for dressing, which seriously affects the efficiency of batch processing. When finely grinding low-hardness materials, a fixed large feed rate makes the grinding wheel edge too sharp, which can easily cause scratches on the workpiece surface. Moreover, the pressure sensor alone cannot distinguish between grinding wheel dullness and grinding wheel abrasive grain gap blockage, which often leads to incorrect dressing or missed cleaning, thereby reducing processing quality and efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide an automatically correctable workpiece grinding machine to solve the problems mentioned in the background art.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A workpiece grinding machine with automatic correction, preferably, includes a base, an XY dual-axis linkage machining bed and a side frame fixedly connected to the top of the base, a grinding wheel body rotatably connected to one end of the side frame, a pressure sensor provided at the shaft end of the grinding wheel body, and a laser rangefinder for detecting changes in the diameter of the grinding wheel body fixedly connected to one end of the side frame.

[0008] A top frame is fixedly connected to the top of the side frame. A support rod is hinged to one end of the top frame. A diamond dresser is fixedly connected to one end of the support rod. A dressing component for driving the diamond dresser to feed towards the outer periphery of the grinding wheel body is installed on the top frame.

[0009] The top frame is also equipped with a cleaning component for blowing off debris embedded between the grinding wheel body and the workpiece. The top of the XY dual-axis linkage machining machine is equipped with a processing component for clamping cylindrical workpieces and driving the workpieces closer to or away from the grinding wheel body.

[0010] A controller is fixedly connected to one end of the base, and the controller is electrically connected to the pressure sensor, laser rangefinder, trimming component, cleaning component, and processing component.

[0011] Preferably, the trimming assembly includes a transmission rod hinged to the middle section of the support rod, an adjusting slider hinged to the top of the transmission rod, an adjusting screw rotatably connected to one end of the top frame, the adjusting slider being threadedly connected to the adjusting screw, a first motor fixedly connected to the top of the top frame, the output end of the first motor being fixedly connected to the adjusting screw, and the first motor being electrically connected to the controller.

[0012] Preferably, the trimming assembly further includes a sliding resistor fixedly connected to one end of the top frame, with a brush slider slidably disposed at one end of the sliding resistor. The brush slider is fixedly connected to the adjusting slider, and the sliding resistor is electrically connected to the controller.

[0013] Preferably, the cleaning assembly includes a laser roughness sensor symmetrically hinged to one end of the top frame, a connecting shaft rotatably connected to the top of the top frame, the connecting shaft being fixedly connected to the laser roughness sensor, a worm gear fixedly connected to the middle section of the connecting shaft, a worm rotatably connected to the top of the top frame, the worm meshing with the worm gear, a second motor fixedly connected to the top of the top frame, the output end of the second motor being fixedly connected to the worm, and the second motor being electrically connected to the controller.

[0014] Preferably, the cleaning assembly further includes a device slot fixedly connected to one end of the top frame, an air jet head hinged inside the device slot, an electric actuator hinged to the middle section of the air jet head, the other end of the electric actuator being rotatably connected to the inside of the device slot, an air compressor fixedly connected inside the base, the input end of the air jet head being fixedly connected to the output end of the air compressor through a pipe, and both the electric actuator and the air compressor being electrically connected to the controller.

[0015] Preferably, a reducer is fixedly connected to one end of the side frame, the output end of the reducer is fixedly connected to the grinding wheel body, a third motor is fixedly connected to the input end of the reducer, a cooling nozzle is fixedly connected to one end of the top frame, the input end of the cooling nozzle is connected to an external water pump through a pipe, and the outlet of the cooling nozzle faces the contact end between the grinding wheel body and the workpiece.

[0016] Preferably, the processing component includes symmetrically arranged positioning slides on the top of the XY dual-axis linkage processing machine, with positioning slides slidably connected inside the two positioning slides, a support platform fixedly connected to the top of the XY dual-axis linkage processing machine, a T-shaped shaft rotatably connected to one end of the support platform, and a three-jaw chuck fixedly connected to the end of the T-shaped shaft facing the positioning slide.

[0017] Preferably, the three-jaw chuck and the positioning slide are concentrically provided with top blocks on opposite sides, one top block is rotatably connected to the positioning slide, and the other top block is fixedly connected to the three-jaw chuck.

[0018] Preferably, the processing assembly further includes a first driven gear rotatably connected to the top of the XY dual-axis linkage processing bed, a first driving gear meshing with the first driven gear rotatably connected to the top of the XY dual-axis linkage processing bed, a fourth motor fixedly connected to the top of the XY dual-axis linkage processing bed, the output end of the fourth motor fixedly connected to the first driving gear, a positioning screw rotatably connected to one end of the positioning slide, one end of the positioning screw passing through the first driven gear and threadedly connected to the first driven gear, and the fourth motor electrically connected to the controller.

[0019] Preferably, the processing assembly further includes a second driven wheel fixedly connected to one end of the T-shaped shaft, a second driving wheel rotatably connected to one end of the XY dual-axis linkage processing bed, a synchronous belt sleeved on the outer periphery of the second driven wheel and the second driving wheel, a fifth motor fixedly connected to one end of the XY dual-axis linkage processing bed, the output end of the fifth motor fixedly connected to the second driving wheel, and the fifth motor electrically connected to the controller.

[0020] The beneficial effects of this invention are:

[0021] 1. This invention, through the combined use of a pressure sensor and a laser rangefinder, can set up a dual-stage correction mechanism of active dressing and passive dressing according to different states of rough grinding and fine grinding. Before processing, the controller drives the motor to link and make the diamond dresser dress according to the preset feed amount of the corresponding stage. The sliding resistor feedbacks the displacement and quickly matches the requirements of the grinding wheel cutting edge. Then, when the grinding wheel is determined to be dull during processing, the workpiece feed is paused and the corresponding dressing action is repeated. This avoids frequent machine stops and prevents excessive wear of the grinding wheel, effectively improving the processing efficiency and applicability of the equipment.

[0022] 2. This invention utilizes a laser roughness sensor in conjunction with an air compressor. When an increase in roughness is detected and the pressure is stable, it indicates blockage in the abrasive gaps of the grinding wheel body. The air jet head and air compressor are then automatically activated to blow away the debris. Conversely, when a decrease in pressure is detected without a change in diameter, it indicates passivation of the grinding wheel body. The dressing component is then automatically activated. If both blockage and passivation occur simultaneously, the process is handled sequentially according to a cleaning-then-dressing logic. This eliminates the need for manual observation or intervention throughout the entire process, effectively reducing downtime in batch processing and further improving the equipment's processing efficiency.

[0023] 3. This invention effectively reduces the coaxiality error of workpiece clamping by setting up a clamping structure with a three-jaw chuck and a concentric center block, combined with the precise feed of the positioning screw and gear transmission. At the same time, the controller can automatically synchronize parameters such as the grinding wheel body speed, workpiece rotation speed, and feed speed. During rough grinding, high speed and large feed amount improve efficiency, while during fine grinding, low feed amount and high speed ensure accuracy, effectively improving the stability of the equipment during workpiece processing. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the workpiece grinding machine in this invention;

[0026] Figure 2 This is a side view of the workpiece grinding machine in this invention;

[0027] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a three-dimensional structural diagram of the side frame in this invention;

[0029] Figure 5 This is a three-dimensional structural diagram of the top frame in this invention;

[0030] Figure 6 This is a three-dimensional structural diagram of the grinding wheel body in this invention;

[0031] Figure 7 This is a three-dimensional structural schematic diagram of the laser roughness sensor in this invention;

[0032] Figure 8 This is a three-dimensional structural diagram of the jet head in this invention;

[0033] Figure 9 This is a schematic diagram of the top structure of the XY dual-axis linkage machining bed in this invention;

[0034] Figure 10 This is a three-dimensional structural diagram of the processing component in this invention;

[0035] The attached diagram is labeled as follows: 1. Base; 2. XY dual-axis linkage machining center; 3. Side frame; 4. Grinding wheel body; 5. Pressure sensor; 6. Laser rangefinder; 7. Top frame; 8. Support rod; 9. Diamond dresser; 10. Transmission rod; 11. Adjusting slider; 12. Adjusting screw; 13. First motor; 14. Controller; 15. Sliding resistor; 16. Brush slider; 17. Laser roughness sensor; 18. Connecting shaft; 19. Worm gear; 20. Worm; 21. Second motor 22. Equipment tank; 23. Jet nozzle; 24. Electric actuator; 25. Air compressor; 26. Reducer; 27. Third motor; 28. Cooling nozzle; 29. ​​Positioning slide; 30. Positioning slide; 31. Support platform; 32. T-shaft; 33. Three-jaw chuck; 34. Center block; 35. First driven gear; 36. First driving gear; 37. Fourth motor; 38. Positioning screw; 39. Second driven wheel; 40. Second driving wheel; 41. Synchronous belt; 42. Fifth motor. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] An automatically correctable workpiece grinding machine belongs to the field of grinding machine technology and is a cylindrical workpiece processing equipment. It is specially used for the staged grinding and precise control of grinding wheel status in the production process of cylindrical workpieces such as hydraulic valve cores and bearing rings in the mechanical manufacturing field. It also integrates the functions of automatic switching of rough and fine grinding parameters and synchronous linkage processing of dual abnormalities such as grinding wheel passivation and chip blockage.

[0038] like Figures 1-6 As shown, it includes a base 1, an XY dual-axis linkage machining bed 2 and a side frame 3 fixedly connected to the top of the base 1, a grinding wheel body 4 rotatably connected to one end of the side frame 3, a pressure sensor 5 is provided on the shaft end of the grinding wheel body 4, and a laser rangefinder 6 for detecting changes in the diameter of the grinding wheel body 4 is fixedly connected to one end of the side frame 3.

[0039] A top frame 7 is fixedly connected to the top of the side frame 3. A support rod 8 is hinged to one end of the top frame 7. A diamond dresser 9 is fixedly connected to one end of the support rod 8. A dressing component for driving the diamond dresser 9 to feed towards the outer periphery of the grinding wheel body 4 is installed on the top frame 7.

[0040] The top frame 7 is also equipped with a cleaning component for blowing off the debris embedded between the grinding wheel body 4 and the workpiece. The top of the XY dual-axis linkage machining machine 2 is equipped with a processing component for clamping cylindrical workpieces and driving the workpieces closer to or away from the grinding wheel body 4.

[0041] A controller 14 is fixedly connected to one end of the base 1. The controller 14 is electrically connected to the pressure sensor 5, the laser rangefinder 6, the trimming component, the cleaning component, and the processing component.

[0042] The trimming assembly includes a transmission rod 10 hinged to the middle section of the support rod 8, an adjusting slider 11 hinged to the top of the transmission rod 10, an adjusting screw 12 rotatably connected to one end of the top frame 7, the adjusting slider 11 and the adjusting screw 12 being threadedly connected, a first motor 13 fixedly connected to the top of the top frame 7, the output end of the first motor 13 being fixedly connected to the adjusting screw 12, and the first motor 13 being electrically connected to the controller 14.

[0043] Furthermore, the trimming assembly also includes a sliding resistor 15 fixedly connected to one end of the top frame 7. A brush slider 16 is slidably disposed at one end of the sliding resistor 15. The brush slider 16 is fixedly connected to the adjusting slider 11, and the sliding resistor 15 is electrically connected to the controller 14.

[0044] Furthermore, a reducer 26 is fixedly connected to one end of the side frame 3, the output end of the reducer 26 is fixedly connected to the grinding wheel body 4, the input end of the reducer 26 is fixedly connected to a third motor 27, and a cooling nozzle 28 is fixedly connected to one end of the top frame 7. The input end of the cooling nozzle 28 is connected to an external water pump through a pipe, and the outlet of the cooling nozzle 28 faces the contact end between the grinding wheel body 4 and the workpiece.

[0045] When in use, the laser rangefinder 6 on the side frame 3 is aligned with the grinding position of the grinding wheel body 4 and the outer circumference of the grinding wheel body 4 respectively. After the controller 14 on the base 1 is powered on, it establishes a signal connection with each component. Then, according to the batch requirements of the workpiece to be processed, the grinding stage and dressing parameters of the workpiece to be processed are preset in the controller 14.

[0046] During rough grinding, the controller 14 first sends a command to the third motor 27 on the side frame 3, causing the third motor 27 to drive the grinding wheel body 4 to rotate at a low speed through the reducer 26. At the same time, it sends a drive command to the first motor 13 on the top frame 7. The first motor 13 drives the adjusting screw 12 to rotate. Since the adjusting slider 11 is threadedly connected to the adjusting screw 12, the adjusting slider 11 moves horizontally along the screw, synchronously pulling the hinged transmission rod 10.

[0047] At this time, the transmission rod 10 pushes the support rod 8 to swing slowly around the hinge point of the top frame 7, so that the diamond dresser 9 at the lower end of the support rod 8 feeds towards the outer periphery of the grinding wheel body 4. The feed amount is executed according to the preset parameters for rough grinding, ensuring that the cutting edge of the grinding wheel reaches the sharpness required for rough grinding. During this process, the sliding resistor 15 on the top frame 7 converts the displacement of the adjusting slider 11 into an electrical signal and feeds it back to the controller 14 in real time through the brush slider 16 fixed to the adjusting slider 11. When the controller 14 detects that the displacement signal reaches the preset feed amount for rough grinding, it immediately controls the first motor 13 to stop, completing the active dressing before rough grinding. Then the speed of the grinding wheel body 4 is increased to the working speed of rough grinding, and the batch rough grinding stage begins.

[0048] Next, during the grinding process, the pressure sensor 5 at the shaft end of the grinding wheel body 4 collects the cutting pressure in real time, and the laser rangefinder 6 monitors the change in the grinding wheel diameter simultaneously. When the controller 14 continuously receives feedback from the pressure sensor 5 that the pressure drop exceeds the preset threshold, and the laser rangefinder 6 detects a passivation signal that the grinding wheel diameter has no obvious wear, passive dressing is initiated. At this time, the controller 14 first controls the processing component to pause the workpiece feed to avoid scratching the workpiece during dressing, and keeps the grinding wheel body 4 rotating at a low speed. Then, the first motor 13 drives the diamond dresser 9 to feed according to the rough grinding parameters. The sliding resistor 15 feeds back the feed depth of the diamond dresser 9 and automatically stops when the feed depth is reached to complete the passivation correction. After dressing, the controller 14 controls the processing component to resume the workpiece feed and continue batch rough grinding.

[0049] When the rough grinding of the entire batch is completed and it is time to switch to the fine grinding stage, the controller 14 first controls the speed of the grinding wheel body 4 to a low speed, and the workpiece stops feeding. Then, the dressing component is actively started to perform dressing according to the fine grinding preset parameters. At this time, the first motor 13 drives the adjusting screw 12 to rotate slightly, so that the moving distance of the adjusting slider 11 is shortened. The transmission rod 10 pushes the support rod 8 to reduce the swing amplitude. The diamond dresser 9 slowly dresses the outer circumference of the grinding wheel with the small feed amount preset for fine grinding, so that the cutting edge of the grinding wheel body 4 is adjusted from the sharp state of rough grinding to the smooth state of fine grinding, avoiding the sharp cutting edge from directly fine grinding and causing the workpiece to be overcut. At the same time, after the sliding resistor 15 is in place, the first motor 13 stops. The dressing is completed, and the equipment automatically switches to the fine grinding working mode.

[0050] During fine grinding, the grinding wheel body 4 rotates at the fine grinding working speed, and the workpiece rotates and is fed at a speed adapted to the fine grinding precision. The pressure sensor 5 and the laser rangefinder 6 continuously monitor the state of the grinding wheel. When a passivation signal indicating a decrease in pressure and no change in diameter is detected, the controller 14 pauses the workpiece feed and initiates passive dressing. At this time, the first motor 13 drives the adjustment screw 12 to further reduce the rotation amplitude, the adjustment slider 11 moves a shorter distance, and the diamond dresser 9 slowly dresses the grinding wheel with a smaller feed amount than the active dressing of fine grinding. After the sliding resistor 15 is in place, the machine stops and the workpiece feed is resumed to continue fine grinding.

[0051] like Figures 4-8 As shown, the cleaning assembly includes a laser roughness sensor 17 symmetrically hinged to one end of the top frame 7. A connecting shaft 18 is rotatably connected to the top of the top frame 7. The connecting shaft 18 is fixedly connected to the laser roughness sensor 17. A worm gear 19 is fixedly connected to the middle section of the connecting shaft 18. A worm 20 is rotatably connected to the top of the top frame 7. The worm 20 meshes with the worm gear 19. A second motor 21 is fixedly connected to the top of the top frame 7. The output end of the second motor 21 is fixedly connected to the worm 20, and the second motor 21 is electrically connected to the controller 14.

[0052] The cleaning assembly also includes an equipment slot 22 fixedly connected to one end of the top frame 7. An air jet 23 is hinged inside the equipment slot 22. An electric push rod 24 is hinged to the middle section of the air jet 23. The other end of the electric push rod 24 is rotatably connected to the inside of the equipment slot 22. An air compressor 25 is fixedly connected inside the base 1. The input end of the air jet 23 is fixedly connected to the output end of the air compressor 25 through a pipe. The electric push rod 24 and the air compressor 25 are both electrically connected to the controller 14.

[0053] In use, the controller 14 first sends a command to the second motor 21 on the top frame 7. The second motor 21 drives the worm 20 to rotate. The worm 20 meshes with the worm wheel 19 in the middle section of the connecting shaft 18, thereby driving the connecting shaft 18 to rotate. At the same time, after the connecting shaft 18 rotates to the preset angle, the detection end of the laser roughness sensor 17 is precisely aligned with the workpiece grinding surface to complete the angle calibration. Then, the laser roughness sensor 17 transmits the workpiece surface roughness data to the controller 14 in real time.

[0054] Then, during the batch rough grinding process, when the controller 14 receives a signal from the laser roughness sensor 17 that the roughness value exceeds the preset threshold for rough grinding and the pressure sensor 5 reports that the cutting pressure does not fluctuate significantly, it is determined that there is debris blockage in the gap between the abrasive grains of the grinding wheel. At this time, the controller 14 first controls the processing component to pause the workpiece feed, keeps the grinding wheel body 4 rotating at a low speed, and then sends an extension command to the electric push rod 24 in the equipment slot 22. The electric push rod 24 pushes the jet head 23 to rotate around the hinge point and adjusts the jet angle to the position aligned with the gap between the abrasive grains of the grinding wheel.

[0055] At this time, the air compressor 25 in the base 1 is started. The high-pressure gas generated by the air compressor 25 is transported to the jet head 23 through the pipeline and continuously sprayed into the abrasive gap on the outer periphery of the grinding wheel body 4 to blow off the embedded debris. Then, after the laser roughness sensor 17 detects that the surface roughness of the workpiece has fallen back to the qualified range, the controller 14 controls the air compressor 25 to stop and the electric push rod 24 to reset in sequence. Then the processing component resumes the workpiece feed and continues the batch rough grinding. If no roughness error signal occurs during the entire rough grinding process, the cleaning component remains in standby state.

[0056] Then, during the batch fine grinding process, because fine grinding has higher requirements for surface quality, the detection frequency of the laser roughness sensor 17 is automatically increased. When the controller 14 detects that the roughness value exceeds the fine grinding preset threshold and the pressure sensor 5 has a stable blockage signal, the processing component is controlled to pause the workpiece feed, and the grinding wheel body 4 keeps rotating at a low speed.

[0057] Subsequently, the controller 14 controls the electric actuator 24 to finely adjust the angle of the jet head 23, and starts the air compressor 25 to spray high-pressure air at a lower pressure to continuously clean up the debris. The laser roughness sensor 17 detects again and confirms that the roughness is qualified. After that, the air compressor 25 stops, the electric actuator 24 resets, and the processing component resumes feeding to continue fine grinding.

[0058] Furthermore, during the rough grinding and fine grinding stages, if the controller 14 simultaneously receives a composite signal indicating both roughness deviation and pressure drop, it means that debris blockage and grinding wheel passivation coexist. In this case, a cleaning action should be performed first, starting the jet head 23 and air compressor 25 according to the cleaning logic of the corresponding stage, and then the passive dressing action of the corresponding stage should be performed, i.e., rough grinding should be dressed according to the rough grinding parameters, and fine grinding should be dressed according to the fine grinding parameters.

[0059] like Figure 1 and Figure 2 , Figure 9 , Figure 10 As shown, the machining assembly includes symmetrically arranged positioning slides 29 on the top of the XY dual-axis linkage machining machine 2. Positioning slides 30 are slidably connected inside the two positioning slides 29. A support table 31 is fixedly connected to the top of the XY dual-axis linkage machining machine 2. A T-shaped shaft 32 is rotatably connected to one end of the support table 31. A three-jaw chuck 33 is fixedly connected to the end of the T-shaped shaft 32 facing the positioning slide 30.

[0060] Among them, the three-jaw chuck 33 and the positioning slide 30 are concentrically provided with a top block 34 on opposite sides. One top block 34 is rotatably connected to the positioning slide 30, and the other top block 34 is fixedly connected to the three-jaw chuck 33.

[0061] Furthermore, the processing assembly also includes a first driven gear 35 rotatably connected to the top of the XY dual-axis linkage processing machine 2, a first driving gear 36 rotatably connected to the top of the XY dual-axis linkage processing machine 2 and meshing with the first driven gear 35, a fourth motor 37 fixedly connected to the top of the XY dual-axis linkage processing machine 2, the output end of the fourth motor 37 fixedly connected to the first driving gear 36, a positioning screw 38 rotatably connected to one end of the positioning slide 30, one end of the positioning screw 38 passing through the first driven gear 35 and threadedly connected to the first driven gear 35, and the fourth motor 37 electrically connected to the controller 14;

[0062] Furthermore, the processing assembly also includes a second driven wheel 39 fixedly connected to one end of the T-shaped shaft 32, a second driving wheel 40 rotatably connected to one end of the XY dual-axis linkage processing machine 2, a synchronous belt 41 sleeved on the outer periphery of the second driven wheel 39 and the second driving wheel 40, a fifth motor 42 fixedly connected to one end of the XY dual-axis linkage processing machine 2, the output end of the fifth motor 42 fixedly connected to the second driving wheel 40, and the fifth motor 42 electrically connected to the controller 14.

[0063] In use, first place one end of the cylindrical workpiece into the three-jaw chuck 33 on one side of the support table 31. The controller 14 controls the three-jaw chuck 33 to automatically center and clamp the workpiece. Then, the controller 14 sends a fine-tuning command to the fourth motor 37. The fourth motor 37 drives the first driving gear 36 to rotate. The first driving gear 36 meshes with the first driven gear 35, thereby driving the positioning screw 38 to rotate. At this time, the positioning screw 38 pushes the positioning slide 30 to slide along the positioning slide groove 29 towards the workpiece until the center block 34 on the positioning slide 30 presses against the other end of the workpiece. Since the three-jaw chuck 33 and the center block 34 on the positioning slide 30 are pre-concentric, the coaxiality error of the workpiece is controlled within the preset range after clamping, and the clamping is completed.

[0064] Then, during the batch rough grinding, the controller 14 sends a command to the fifth motor 42, which drives the second drive wheel 40 to rotate. The second drive wheel 40 drives the second driven wheel 39 to rotate through the synchronous belt 41. Since the second driven wheel 39 is fixed to the T-shaped shaft 32, the T-shaped shaft 32 drives the three-jaw chuck 33 to rotate synchronously with the workpiece. The rotation speed is executed according to the preset parameters of rough grinding.

[0065] At the same time, the controller 14 controls the XY dual-axis linkage machining bed 2 to drive the workpiece slowly close to the grinding wheel body 4 at the rough grinding feed speed to achieve rough grinding cutting. When the dressing component or cleaning component is started, the controller 14 sends a pause command to the XY dual-axis linkage machining bed 2 and the fifth motor 42. The workpiece stops feeding and rotating. After the dressing or cleaning is completed, the XY dual-axis linkage machining bed 2 and the fifth motor 42 resume operation and continue rough grinding.

[0066] During batch fine grinding, the controller 14 automatically adjusts the speed parameters of the fifth motor 42 to increase the workpiece rotation speed to the fine grinding preset value, while reducing the drive speed of the XY dual-axis linkage machining bed 2. This causes the workpiece to slowly approach the grinding wheel body 4 at the fine grinding feed speed to begin batch fine grinding. If the dressing or cleaning component is activated during the fine grinding process, the controller 14 immediately controls the XY dual-axis linkage machining bed 2 to pause the feed and the fifth motor 42 to pause the workpiece rotation. After the dressing or cleaning action is completed, the XY dual-axis linkage machining bed 2 resumes the feed at the original fine grinding feed speed, and the fifth motor 42 resumes rotation at the original fine grinding rotation speed.

[0067] After processing is completed, the controller 14 sends a release command to the three-jaw chuck 33, the three-jaw chuck 33 releases the workpiece, and at the same time controls the fourth motor 37 to rotate in the opposite direction. The positioning screw 38 drives the positioning slide 30 to move along the positioning slide groove 29 away from the three-jaw chuck 33, thus releasing the clamping of the workpiece.

[0068] The working principle of the workpiece grinding machine with automatic correction provided by this invention is as follows:

[0069] First, the laser rangefinder 6 is aligned with the outer circumferential surface of the grinding wheel body 4. The laser roughness sensor 17 is driven by the second motor 21 to calibrate the angle to align with the workpiece grinding surface. The feed rate, working speed, workpiece feed speed, and roughness qualification threshold of the grinding wheel body 4 are preset in the controller 14 for the rough grinding stage and the fine grinding stage. At the same time, the judgment criteria for grinding wheel passivation and chip blockage are set. Then, the workpiece is clamped by the three-jaw chuck 33 and pressed against the center block 34 to complete the clamping.

[0070] Then, during the rough grinding stage, the controller 14 first sends a command to the third motor 27 on the side frame 3, causing the third motor 27 to drive the grinding wheel body 4 to rotate at a low speed through the reducer 26. At the same time, it sends a drive command to the first motor 13 on the top frame 7. The first motor 13 drives the adjusting screw 12 to rotate. Since the adjusting slider 11 is threadedly connected to the adjusting screw 12, the adjusting slider 11 moves horizontally along the screw, synchronously pulling the hinged transmission rod 10.

[0071] At this time, the transmission rod 10 pushes the support rod 8 to swing slowly around the hinge point of the top frame 7, so that the diamond dresser 9 at the lower end of the support rod 8 feeds towards the outer periphery of the grinding wheel body 4. The feed amount is executed according to the preset parameters for rough grinding, ensuring that the cutting edge of the grinding wheel reaches the sharpness required for rough grinding.

[0072] During this process, the sliding resistor 15 on the top frame 7 converts the displacement of the adjusting slider 11 into an electrical signal and feeds it back to the controller 14 in real time through the brush slider 16 fixed to the adjusting slider 11. When the controller 14 detects that the displacement signal reaches the preset feed amount for coarse grinding, it immediately controls the first motor 13 to stop, thus completing the active dressing before coarse grinding.

[0073] Subsequently, the rotation speed of the grinding wheel body 4 is increased to the rough grinding working speed, while the fifth motor 42 drives the workpiece to rotate at the rough grinding speed, and the XY dual-axis linkage machining bed 2 drives the grinding wheel body 4 to approach the grinding wheel at the rough grinding feed speed to start batch rough grinding.

[0074] During the rough grinding process, the pressure sensor 5 at the shaft end of the grinding wheel body 4 collects the cutting pressure in real time, and the laser rangefinder 6 monitors the change in the grinding wheel diameter simultaneously. When the controller 14 continuously receives feedback from the pressure sensor 5 that the pressure drop exceeds the preset threshold, and the laser rangefinder 6 detects a passivation signal that the grinding wheel diameter has no obvious wear, it immediately controls the processing components to stop the workpiece feed to avoid scratching the workpiece during dressing, while keeping the grinding wheel body 4 rotating at a low speed.

[0075] Then, the first motor 13 drives the adjusting screw 12 to rotate, and the adjusting slider 11 drives the transmission rod 10 and the support rod 8 to move together, so that the diamond dresser 9 feeds according to the rough grinding parameters. The sliding resistor 15 provides real-time feedback of the displacement signal. After the displacement reaches the preset value, the controller 14 controls the first motor 13 to stop, and the passivation correction is completed. After dressing, the controller 14 controls the processing components to resume the workpiece feeding and rotation, and continues the batch rough grinding.

[0076] Next, during the fine grinding stage, the controller 14 starts the first motor 13, which drives the diamond dresser 9 to dress the grinding wheel according to the preset small feed amount for fine grinding, adjusting the cutting edge from a sharp state to a smooth state to avoid scratching the workpiece during fine grinding.

[0077] Finally, the grinding wheel body 4 is raised to the fine grinding working speed, and the XY dual-axis linkage machining bed 2 drives the workpiece close to the grinding wheel to start fine grinding according to the fine grinding feed speed. The laser roughness sensor 17 monitors the surface quality of the workpiece. When a chip blockage signal is detected, the controller 14 pauses the workpiece processing, the electric push rod 24 adjusts the angle of the jet head 23, and the air compressor 25 starts to spray high-pressure air to clean the chips. After the cleaning is qualified, fine grinding is resumed. When a grinding wheel passivation signal is detected, the workpiece processing is paused. The grinding wheel is dressed according to the fine grinding small feed amount and then fine grinding is resumed. Finally, after the processing is completed, the three-jaw chuck 33 releases the workpiece, and the positioning slide 30 is reset.

[0078] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An automatically correctable workpiece grinding machine characterized by: Including the base (1), the top of the base (1) is fixedly connected with XY double shaft linkage processing bed (2) and side frame (3), one end of side frame (3) is rotatably connected with grinding wheel body (4), the shaft end of grinding wheel body (4) is provided with pressure sensor (5), one end of side frame (3) is fixedly connected with laser range finder (6) for detecting the diameter change of grinding wheel body (4); The top of the side frame (3) is fixedly connected with the top frame (7), one end of the top frame (7) is hingedly connected with the support rod (8), one end of the support rod (8) is fixedly connected with the diamond dresser (9), the top frame (7) is provided with a dressing assembly for driving the diamond dresser (9) to feed to the outer circumferential direction of the grinding wheel body (4). The top frame (7) is also provided with a cleaning assembly for blowing off the embedded debris between the grinding wheel body (4) and the workpiece, and the top of the XY double shaft linkage processing bed (2) is provided with a machining assembly for clamping a cylindrical workpiece and driving the workpiece to approach or move away from the grinding wheel body (4). One end of the base (1) is fixedly connected with the controller (14), and the controller (14) is electrically connected with the pressure sensor (5), the laser range finder (6), the dressing assembly, the cleaning assembly and the machining assembly respectively. The dressing assembly comprises a transmission rod (10) hingedly connected to the middle segment of the support rod (8), the top of the transmission rod (10) is hingedly connected with an adjusting sliding block (11), one end of the top frame (7) is rotatably connected with an adjusting screw rod (12), the adjusting sliding block (11) is threadedly connected with the adjusting screw rod (12), the top of the top frame (7) is fixedly connected with a first motor (13), the output end of the first motor (13) is fixedly connected with the adjusting screw rod (12), and the first motor (13) is electrically connected with the controller (14). Furthermore, the dressing assembly further comprises a sliding resistor (15) fixedly connected to one end of the top frame (7), one end of the sliding resistor (15) is slidably provided with a brush sliding block (16), the brush sliding block (16) is fixedly connected with the adjusting sliding block (11), and the sliding resistor (15) is electrically connected with the controller (14).

2. The self-correcting workpiece grinder of claim 1, wherein: The cleaning assembly comprises a laser roughness sensor (17) symmetrically hingedly connected to one end of the top frame (7), the top of the top frame (7) is rotatably connected with a connecting shaft (18), the connecting shaft (18) is fixedly connected with the laser roughness sensor (17), the middle segment of the connecting shaft (18) is fixedly connected with a worm gear (19), the top of the top frame (7) is rotatably connected with a worm (20), the worm (20) is engaged with the worm gear (19), the top of the top frame (7) is fixedly connected with a second motor (21), the output end of the second motor (21) is fixedly connected with the worm (20), and the second motor (21) is electrically connected with the controller (14).

3. An automatic rectifying workpiece grinding machine as claimed in claim 2, wherein: The cleaning assembly further comprises a device groove (22) fixedly connected to one end of the top frame (7), a jet head (23) hingedly connected inside the device groove (22), a motorized push rod (24) hingedly connected to the middle section of the jet head (23), the other end of the motorized push rod (24) being rotatably connected to the inside of the device groove (22), an air compressor (25) fixedly connected inside the base (1), the input end of the jet head (23) being fixedly connected with the output end of the air compressor (25) through a pipeline, and the motorized push rod (24) and the air compressor (25) being electrically connected with the controller (14).

4. The self-correcting workpiece grinder of claim 1 wherein: One end of the side frame (3) is fixedly connected with a speed reducer (26), the output end of the speed reducer (26) is fixedly connected with the grinding wheel body (4), the input end of the speed reducer (26) is fixedly connected with a third motor (27), one end of the top frame (7) is fixedly connected with a cooling nozzle (28), the input end of the cooling nozzle (28) is externally connected with a water supply pump through a pipeline, and the water outlet of the cooling nozzle (28) faces the contact end of the grinding wheel body (4) and the workpiece.

5. The self-correcting workpiece grinder of claim 1 wherein: The machining assembly comprises positioning sliding grooves (29) symmetrically formed on the top of the XY double-shaft linkage machining bed (2), positioning sliding tables (30) slidably connected inside the two positioning sliding grooves (29), a supporting table (31) fixedly connected to the top of the XY double-shaft linkage machining bed (2), a T-shaped shaft (32) rotatably connected to one end of the supporting table (31), and a three-jaw chuck (33) fixedly connected to one end of the T-shaped shaft (32) facing the positioning sliding table (30).

6. An automatically self-correcting workpiece grinder as defined in claim 5, wherein: The three-jaw chuck (33) and the positioning sliding table (30) are concentrically provided with center blocks (34) on opposite sides thereof, one center block (34) is rotatably connected to the positioning sliding table (30), and the other center block (34) is fixedly connected to the three-jaw chuck (33).

7. An automatically self-correcting workpiece grinder as defined in claim 5 wherein: The machining assembly further comprises a first driven gear (35) rotatably connected to the top of the XY double-shaft linkage machining bed (2), a first driving gear (36) rotatably connected to the top of the XY double-shaft linkage machining bed (2) and engaged with the first driven gear (35), a fourth motor (37) fixedly connected to the top of the XY double-shaft linkage machining bed (2) and having an output end fixedly connected with the first driving gear (36), and a positioning screw rod (38) rotatably connected to one end of the positioning sliding table (30) and having one end penetrating through the first driven gear (35) and being threadedly connected with the first driven gear (35), and the fourth motor (37) being electrically connected with the controller (14).

8. The self-correcting workpiece grinder of claim 5 wherein: The machining assembly further comprises a second driven wheel (39) fixedly connected to one end of the T-shaped shaft (32), a second driving wheel (40) rotatably connected to one end of the XY double-shaft linkage machining bed (2), a synchronous belt (41) sleeved around the outer periphery of the second driven wheel (39) and the second driving wheel (40), a fifth motor (42) fixedly connected to one end of the XY double-shaft linkage machining bed (2) and having an output end fixedly connected with the second driving wheel (40), and the fifth motor (42) being electrically connected with the controller (14).

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