Motor shaft rod outer circle precision machining device

Abstract

The application discloses a motor shaft rod outer circle precision machining device, which comprises a bed body, a main shaft box, a tailstock, a workbench, a grinding mechanism and a measuring mechanism. The measuring mechanism comprises a sliding table slidably arranged on the top of the bed body, an arc-shaped frame arranged on the sliding table and a measuring assembly arranged on the arc-shaped frame. The measuring assembly at least comprises an optical profile sensor and a confocal probe. The sliding table is connected with the workbench through a flexible blocking strip to realize vibration isolation of measurement and machining. A protection assembly composed of a protective cover and a jet pipe is arranged at the lens of the measuring assembly. The jet pipe sprays airflow to form an air curtain wall to prevent dust and cutting fluid from polluting the lens. The arc-shaped frame and the sliding table are detachably connected through a plug-in part and a plug-in hole. A fine adjustment assembly is arranged between the mounting seat and the supporting seat. The motor shaft outer circle precision machining device can effectively isolate grinding vibration, protect the measuring lens from pollution and realize accurate calibration of the measuring angle, thereby improving the precision and consistency of motor shaft outer circle machining.

Description

Technical Field

[0001] This invention relates to the field of precision machining technology for motor shafts, and in particular to a precision machining device for the outer diameter of a motor shaft. Background Technology

[0002] The motor shaft is the core transmission component of the motor, and its outer diameter machining accuracy directly affects the motor's operating efficiency, vibration and noise (NVH) performance, and service life. As the electric drive systems of new energy vehicles evolve towards higher power density and higher speed, the requirements for the roundness, cylindricity, and coaxiality errors of the motor shaft are being compressed to the micrometer level.

[0003] Traditional machining of motor shaft outer diameters often employs ordinary cylindrical grinding machines. During machining, dimensional control relies on operator experience, and the workpiece is unloaded and sent to an inspection room for random sampling after machining. This method has the following problems: 1. Separation of machining and inspection makes it impossible to know dimensional deviations in real time, resulting in a high scrap rate; 2. Continuing machining after unloading the workpiece for inspection introduces secondary positioning errors, which are particularly serious for high-precision motor shafts; 3. Low inspection efficiency, making full inspection impossible and posing certain quality risks.

[0004] Therefore, how to provide a precision machining device for the outer diameter of a motor shaft is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] One objective of this invention is to provide a precision machining device for the outer diameter of a motor shaft. This invention achieves vibration isolation between measurement and machining by independently mounting an online measurement component on a slide on the bed rail and softly connecting it to the worktable, thereby improving the accuracy, consistency, and production efficiency of the outer diameter machining of the motor shaft.

[0006] A precision machining device for the outer diameter of a motor shaft according to an embodiment of the present invention includes a machine bed, a spindle box at one end of the machine bed, a rotary spindle installed in the spindle box, and a chuck installed at one end of the rotary spindle; a tailstock at the other end of the machine bed, with a center mounted on the tailstock; a worktable mounted on the machine bed and driven by a Z-axis feed mechanism and an X-axis feed mechanism; a grinding mechanism disposed on the worktable for grinding the outer diameter of the motor shaft workpiece; and a measuring mechanism including a slide table slidably mounted on the top of the machine bed, an arc-shaped frame mounted on the slide table, and a measuring component mounted on the arc-shaped frame, the measuring component being used to collect data from the motor shaft workpiece. The dimensions and contour data of the component; a flexible barrier is provided between the slide and the worktable, and the slide is flexibly connected to the worktable through the flexible barrier; a protective component is provided at the lens of the measuring component, the protective component includes a protective cover located in front of the lens and a jet pipe installed on the protective cover, the jet pipe is connected to a high-pressure air source and sprays airflow to form an air curtain; a mounting base is fixed on the arc frame, and a support base for fixing the measuring component is movably installed in the mounting base, and an adjustment component for adjusting the measuring angle of the measuring component is provided between the mounting base and the support base; the arc frame and the slide are detachably connected.

[0007] Preferably, the measurement component includes at least one of an optical profile sensor, a confocal probe, and a laser displacement sensor.

[0008] Preferably, the measuring components are provided in two parts, symmetrically arranged on both sides of the motor shaft workpiece, forming a diameter measuring structure.

[0009] Preferably, the jet pipe is annular, with an exhaust slit on its inner side, and the jet direction of the exhaust slit is inclined inward relative to the radial direction of the jet pipe.

[0010] Preferably, the adjustment assembly includes an adjustment screw rotatably mounted on the mounting base and a connecting block slidably mounted on the mounting base, wherein the adjustment screw is threadedly connected to the connecting block; the connecting block has a slot, and a connecting rod is fixed on the support base, wherein the connecting rod is embedded in the slot.

[0011] Preferably, a gasket is fixed in the slot, and the connecting rod is inserted into the slot to press the gasket.

[0012] Preferably, the bottom of the connecting block is equipped with an anti-slip pad.

[0013] Preferably, a connecting part is provided on one side of the slide, and a magnet is fixed on the connecting part. The slide is attracted to the side of the worktable through the magnet. The flexible barrier is a flexible barrier strip disposed between the magnet and the worktable.

[0014] Preferably, the bottom of the arc-shaped frame is fixed with a plug-in part, and the top of the slide table is provided with a plug-in hole. The plug-in part is inserted into the plug-in hole and fixed by fasteners.

[0015] Preferably, the top of the slide table is provided with a positioning groove, and a positioning column is fixed on the arc-shaped frame, with the positioning column inserted into the positioning groove.

[0016] Preferably, the diameter of the arc-shaped frame is larger than the rotation diameter of the chuck.

[0017] The beneficial effects of this invention are:

[0018] This invention features a measuring mechanism that is independently mounted on the bed rail via a slide table and is softly connected to the worktable via a magnet block and a flexible barrier strip. This effectively isolates the vibrations generated during the grinding process from being transmitted to the measuring components, thereby improving measurement accuracy and stability.

[0019] This invention, by setting up a measurement component including an optical profile sensor, a confocal probe, and a laser displacement sensor, can simultaneously measure multiple geometric feature parameters of the motor shaft, such as diameter, roundness, chamfer, undercut groove, and keyway, thereby facilitating a comprehensive assessment of the motor shaft's production quality.

[0020] This invention constructs a diameter measurement structure by symmetrically arranging two measuring components on both sides of the motor shaft. Through differential calculation, it effectively eliminates the influence of workpiece radial runout on the measurement results, thereby further improving measurement accuracy.

[0021] This invention, by setting up a protective cover and an air jet pipe, forms an air curtain wall through high-pressure airflow, effectively preventing grinding fluid and metal dust from contaminating the measuring lens, which is beneficial for the long-term stable operation of the measuring system in the harsh environment of grinding.

[0022] This invention achieves fine-tuning of the pitch angle of the measuring component by adjusting the screw to drive the connecting block to move, which in turn drives the support base to rotate via the connecting rod. The calibration operation is convenient and highly accurate. By placing rubber pads in the slots and anti-slip pads on the bottom of the connecting block, movement gaps are effectively eliminated, improving adjustment stability.

[0023] This invention enables quick assembly and disassembly by setting up an arc-shaped frame and connecting the plug-in part with the plug-in hole, which facilitates the installation and disassembly of the arc-shaped frame. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0025] Figure 1This is a schematic diagram of the structure of a precision machining device for the outer circle of a motor shaft proposed in this invention.

[0026] Figure 2 This is a schematic diagram of the grinding mechanism in a precision machining device for the outer diameter of a motor shaft proposed in this invention.

[0027] Figure 3 This is a schematic diagram of the measuring mechanism in a precision machining device for the outer diameter of a motor shaft proposed in this invention.

[0028] Figure 4 This is a schematic diagram showing the installation position of the measuring component in a precision machining device for the outer diameter of a motor shaft proposed in this invention.

[0029] Figure 5 This is a schematic diagram of the installation structure of the protective component in a precision machining device for the outer circle of a motor shaft proposed in this invention.

[0030] Figure 6 This is a schematic diagram of an embodiment of the jet pipe in a precision machining device for the outer circle of a motor shaft proposed in this invention.

[0031] Figure 7 This is a schematic diagram of the protective cover in the precision machining device for the outer circle of a motor shaft proposed in this invention when it is not in use.

[0032] Figure 8 This is a schematic diagram of the micro-adjustment component in a precision machining device for the outer diameter of a motor shaft proposed in this invention.

[0033] Figure 9 This is a schematic diagram of the connecting block in a precision machining device for the outer diameter of a motor shaft proposed in this invention.

[0034] Figure 10 This is a schematic diagram of the slide table in a precision machining device for the outer diameter of a motor shaft proposed in this invention.

[0035] Figure 11 This is a schematic diagram of the flexible connection structure between the slide and the worktable in a precision machining device for the outer diameter of a motor shaft proposed in this invention.

[0036] Figure 12 This is a schematic diagram of an embodiment of the arc-shaped frame in a precision machining device for the outer circle of a motor shaft proposed in this invention.

[0037] Figure 13 This is a schematic diagram of the positioning groove and positioning column mating and insertion structure in a precision machining device for the outer circle of a motor shaft proposed in this invention.

[0038] Figure 14 This is a schematic diagram of the slide position after the arc frame is removed from the precision machining device for the outer circle of a motor shaft proposed in this invention.

[0039] In the diagram: 1. Bed; 2. Spindle box; 3. Rotary spindle; 4. Chuck; 5. Motor shaft workpiece; 6. Tailstock; 7. Center; 8. Worktable; 9. Z-axis feed mechanism; 10. X-axis feed mechanism; 11. Rotary shaft; 12. Grinding wheel; 13. Slide table; 14. Arc frame; 15. Measuring assembly; 16. Mounting base; 17. Support base; 18. Protective cover; 19. Air jet pipe; 20. Exhaust slit; 21. Adjusting screw; 22. Connecting pipe; 23. Sealing cover; 24. Connecting rod; 25. Connecting block; 26. Slot; 27. Gasket; 28. Anti-slip pad; 29. ​​Insertion part; 30. Insertion hole; 31. Positioning groove; 32. Connecting part; 33. Magnet block; 34. Flexible barrier strip; 35. Positioning column. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0041] Example 1

[0042] refer to Figures 1-3 The present invention provides a precision machining device for the outer circle of a motor shaft, comprising a bed 1, a spindle box 2, a tailstock 6, a worktable 8, a grinding mechanism, and a measuring mechanism.

[0043] The spindle box 2 is located at one end of the bed 1, and a rotary spindle 3 is installed inside the spindle box 2. A chuck 4 is installed at one end of the rotary spindle 3. The tailstock 6 is installed at the other end of the bed 1, and a center 7 is installed on it. One end of the motor shaft workpiece 5, which has been machined on the lathe, is clamped and fixed by the chuck 4, and the other end is held by the center 7. The rotary spindle 3 drives the workpiece 5 to rotate.

[0044] The worktable 8 is mounted on the bed 1 and driven by the Z-axis feed mechanism 9 and the X-axis feed mechanism 10, allowing it to move along the Z-axis (axial) and X-axis (radial) directions. The grinding mechanism is located on the worktable 8 and includes a rotating shaft 11 rotatably mounted on the worktable 8 and a grinding wheel 12 mounted on the rotating shaft 11. The rotating shaft 11 is driven by a motor on the worktable 8, and the motor's output shaft is connected and fixed to one end of the rotating shaft 11 via a coupling, thereby driving the grinding wheel 12 to rotate.

[0045] The measuring mechanism includes a slide table 13 mounted on the bed 1 and capable of sliding along a track on the top of the bed 1. An arc-shaped frame 14 is mounted on the slide table 13, and a measuring assembly 15 is mounted on the arc-shaped frame 14. The measuring assembly 15 includes at least an optical profile sensor and a confocal probe. The optical profile sensor is used to measure the diameter and roundness of the motor shaft, and the confocal probe is used to capture microscopic profile features such as chamfers, undercuts, and keyways on the motor shaft. Furthermore, the measuring assembly 15 also includes a laser displacement sensor for measuring its distance from the surface of the workpiece 5.

[0046] Driven by a spindle servo motor, the rotary spindle 3 rotates, which in turn rotates the workpiece 5 clamped by the chuck 4. Simultaneously, the CNC system, through its built-in program, controls the Z-axis feed mechanism 9 and the X-axis feed mechanism 10 to drive the worktable 8, causing the rotating grinding wheel 12 to approach and contact the workpiece 5, performing fine grinding on the outer diameter of the workpiece 5. The Z-axis feed mechanism 9 and the X-axis feed mechanism 10 adopt existing CNC grinding machine designs, which will not be described in detail here.

[0047] During the grinding process, due to factors such as grinding force, grinding wheel wear, and thermal deformation, the actual dimensions of workpiece 5 will gradually approach but with uncertain deviations. In order to monitor the processing status in real time, when workpiece 5 is close to its final dimensions (i.e., after rough grinding and during the fine grinding stage), the CNC system issues a measurement command. At this time, the worktable 8 pushes the slide 13 along the track of the bed 1 towards the side closer to the chuck 4 through the soft connection structure until the measuring component 15 on the arc frame 14 reaches the position of the section to be measured on workpiece 5.

[0048] The measurement component 15 begins operation: the optical profile sensor emits structured light or a laser beam to illuminate the surface of workpiece 5, and calculates the diameter and roundness data of workpiece 5 at that cross-section by receiving the reflected light signal; the confocal probe, through the principle of confocal optics, performs high-precision capture of micro-profile features such as chamfers, undercut grooves, and keyways on the surface of workpiece 5; the laser displacement sensor measures its distance from the surface of workpiece 5 in real time as auxiliary reference data. The data collected by each sensor is transmitted to the data acquisition card via lines, converted into digital signals by the data acquisition card, and then transmitted to the industrial controller. The industrial controller performs comprehensive processing and analysis of the data, and transmits the analysis results to the CNC system via the data bus.

[0049] Based on the received measurement data, the CNC system determines whether the current workpiece size has reached the preset target value. If not, the CNC system automatically adjusts the feed parameters of the grinding mechanism (such as feed speed and grinding depth) to control the grinding wheel 12 to continue micro-grinding the workpiece 5; if the target value has been reached, grinding is stopped or the process transitions to the finishing grinding stage. This cycle repeats, achieving closed-loop precision machining of "measurement, feedback, and compensation".

[0050] It is worth noting that after installation, the measuring component 15 must be calibrated using a standard gauge bar to ensure the accuracy of the measurement data. The calibration process will not be described in detail here.

[0051] Furthermore, such as Figure 3 As shown, there are two measuring components 15, symmetrically arranged on both sides of the workpiece 5 on the motor shaft, forming a diameter measurement structure. When the workpiece 5 rotates, due to the eccentric clamping of the chuck 4 or the bending of the workpiece 5 itself, the workpiece 5 will generate radial runout during rotation. If only a single-sided sensor is used for measurement, the runout will be directly superimposed on the measurement result, causing errors. However, with the diameter measurement structure, both sensors simultaneously measure the distance between the two surfaces of the workpiece 5, and the influence of the radial runout of the workpiece 5 on the measurement result is eliminated through differential calculation (i.e., the sum / difference of the two sensor readings), thereby obtaining more accurate diameter data and further improving measurement accuracy.

[0052] Example 2

[0053] like Figures 4-7 As shown, mounting bases 16 are fixed at both ends of the arc-shaped frame 14. A support base 17 for fixing the measuring component 15 is installed inside the mounting base 16. The measuring component 15 is inserted and fixed on the support base 17 and fastened by screws on the top of the support base 17. A protective component is provided at the front end of the measuring component 15, i.e., at the lens, to protect the lens of the measuring component 15 from contamination by dust or cutting fluid.

[0054] Specifically, the protective assembly includes a protective cover 18 fixed to the support base 17, which surrounds the lens of the measuring assembly 15. An air jet pipe 19 is mounted on the protective cover 18 and connected to an external high-pressure dry air source via a connecting pipe 22. The air jet pipe 19 sprays air to form an air curtain at the front of the protective cover 18, preventing external dust or cutting fluid from entering the inside of the protective cover 18.

[0055] Furthermore, the jet pipe 19 is annular, and an exhaust slit 20 is provided on its inner side, which is inclined outward at 30-60 degrees. The high-pressure airflow is ejected through the exhaust slit 20 to the center of the front side of the protective cover 18, forming a cone-shaped air curtain wall, which prevents external debris from entering the inner side of the protective cover 18.

[0056] Furthermore, the jet pipe 19 can also be configured as an arc shape, with the internal airflow being sprayed diagonally downwards towards the front of the protective cover 18 through the inclined exhaust slit 20, preventing external debris from entering the inside of the protective cover 18.

[0057] It is worth noting that when not in use, a sealing cap 23 is installed on the protective cover 18 for sealing.

[0058] An external high-pressure dry air source provides clean compressed air, which is delivered to the jet pipe 19 through the connecting pipe 22. The exhaust slit 20 on the jet pipe 19 ejects the high-pressure airflow at a specific angle.

[0059] When the jet pipe 19 adopts a ring structure, the exhaust slit 20 is arranged around the circumference and tilted outward at 30-60 degrees. The airflows injected from all directions converge in the central area in front of the protective cover 18, forming a cone-shaped air curtain. This air curtain physically isolates the lens from the external environment. When air carrying dust or cutting fluid attempts to enter the inside of the protective cover 18, it will be blown away or deflected by the high-speed airflow and will not reach the lens surface.

[0060] When the jet pipe 19 adopts an arc-shaped structure, the exhaust slit 20 is a continuous narrow slit. High-pressure airflow is ejected diagonally downward from the slit, forming a flat air curtain in front of the protective cover 18. The bottom of this air curtain extends to the bottom of the protective cover 18, covering the lens inlet from above and in front in all directions, effectively preventing external debris from entering.

[0061] The two jet pipe structures can be flexibly selected according to the actual installation space and protection requirements.

[0062] Example 3

[0063] like Figure 5 , Figure 7 and Figure 8 As shown, a fine-tuning component is provided between the mounting base 16 and the support base 17 for fine-tuning the pitch angle of the measuring component.

[0064] Specifically, the fine-tuning component includes an adjusting screw 21 rotatably mounted on the mounting base 16, and a connecting block 25 slidably mounted on the top of the mounting base 16. The adjusting screw 21 is threadedly connected to the connecting block 25. A slot 26 is formed on the top of the connecting block 25, and a cylindrical connecting rod 24 is fixed to the bottom of the support base 17. The diameter of the connecting rod 24 is adapted to the width of the slot 26, so that it can be perfectly embedded in the slot and can slide up and down relative to it along the slot.

[0065] Furthermore, a rubber pad 27 is fixed inside the slot 26. After the connecting rod 24 is embedded in the slot 26, it squeezes the pad 27, which increases the resistance when the two move relative to each other, eliminates the movement gap, and improves stability.

[0066] Furthermore, an anti-slip pad 28 is installed at the bottom of the connecting block 25. Since the adjusting screw 21 passes through the connecting block 25, it restricts the distance between the connecting block 25 and the mounting base 16, thereby squeezing the anti-slip pad 28, increasing the moving resistance of the connecting block 25, which is beneficial to improving stability.

[0067] After the measuring component 15 is installed on the arc frame 14, an angular deviation inevitably exists between its laser beam or optical axis and the axis of the workpiece 5. If this deviation is not corrected, it will lead to systematic errors in the measurement results and affect the machining accuracy.

[0068] The operator first uses a standard gauge bar to perform preliminary measurements on the measuring component 15. The standard gauge bar is clamped between the chuck 4 and the center 7, and the slide 13 is moved to align the measuring component 15 with the gauge bar, acquiring a set of measurement data. The industrial controller compares the measurement data with the actual diameter of the standard gauge bar to calculate the angular deviation.

[0069] Based on the calculated deviation, the operator rotates the adjusting screw 21. Since the adjusting screw 21 is threadedly connected to the connecting block 25 and is rotatably mounted on the mounting base 16, the connecting block 25 slides along the top of the mounting base 16 when the adjusting screw 21 rotates. As the connecting block 25 moves, it drives the connecting rod 24 to move through the slot 26 on its top. Because the connecting rod 24 is fixed to the bottom of the support base 17, and the support base 17 is mounted on the mounting base 16 via a hinge shaft on its side, the movement of the connecting rod 24 drives the support base 17 to rotate around the hinge shaft, thereby causing the measuring component 15 fixed to the support base 17 to pitch and swing, achieving fine adjustment of the laser beam or optical axis angle.

[0070] After adjusting the angle, use the standard gauge bar again for measurement verification. If the deviation between the measured data and the true value still exceeds the allowable range, continue fine-tuning until the deviation between the measured data and the true value of the standard gauge bar is within the error range.

[0071] During this process, the rubber pad 27 fixed inside the slot 26 is squeezed by the connecting rod 24, resulting in elastic deformation. This increases the friction between the connecting rod 24 and the slot 26, eliminating the clearance between them and preventing angle drift caused by the clearance during measurement. Simultaneously, the anti-slip pad 28 at the bottom of the connecting block 25 is pressed against the surface of the mounting base 16 after the adjusting screw 21 is tightened, further restricting the free movement of the connecting block 25. This helps maintain the stability of the calibrated angle in the grinding vibration environment.

[0072] Example 4

[0073] like Figure 4 , Figure 10 , Figure 11 As shown, in this embodiment, a connector 29 is fixed to the bottom of the arc-shaped frame 14, and a connector hole 30 is provided on the top of the slide table 13. The connector hole 30 is preferably countersunk. The connector 29 is inserted into the connector hole 30 until its bottom end abuts against the step. The screws on the side of the slide table 13 are then used to secure it in the hole, thereby connecting the arc-shaped frame 14 to the slide table 13. When measurement is not required, such as... Figure 14As shown, remove the arc-shaped frame 14 and push the slide table 13 to the side closer to the chuck 4. The slide table 13 is located outside the rotation range of the chuck 4 to avoid interference.

[0074] A connecting part 32 is integrally provided on one side of the slide table 13 for flexible connection with the worktable 8, so that the worktable 8 will not drive the slide table 13 to move radially when it moves radially.

[0075] Specifically, a magnet 33 is embedded and fixed on the side of the connecting part 32 facing the worktable 8 (i.e., the tail end of the bed 1), and a soft connection is achieved by the attraction between the magnet 33 and the side of the worktable 8.

[0076] Furthermore, a flexible barrier strip 34 with a sponge structure is fixed to the connecting part 32. When the magnet 33 attracts the worktable 8, it will compress the flexible barrier strip 34, so that the magnet 33 will not directly contact the worktable 8. And when the worktable 8 pushes the slide 13 to move, the magnet 33 will not directly contact the worktable 8.

[0077] It is worth noting that the diameter of the arc-shaped bracket 14 is large enough, larger than the rotation diameter of the chuck 4, so that the arc-shaped bracket 14 can be placed below the chuck 4, reducing the impact on the machining process.

[0078] When the grinding mechanism is working, the grinding wheel 12 rotates at high speed to cut the workpiece 5, generating significant cutting force and vibration. This vibration is transmitted to the bed 1 through the worktable 8 and also through the air. If the measuring component 15 is rigidly connected to the worktable 8, the grinding vibration will be directly transmitted to the measuring component 15, causing sensor jitter and severely affecting measurement accuracy.

[0079] When the grinding mechanism is working, the vibration generated on the worktable 8 is transmitted to the connecting part 32. When the vibration wave passes through the sponge structure, the high damping characteristics of the porous structure of the sponge can convert the mechanical vibration energy into internal energy and dissipate it, thereby significantly attenuating the vibration energy transmitted to the slide table 13. At the same time, since the magnet block 33 is not in direct rigid contact with the worktable 8, the vibration energy cannot be transmitted through a rigid path, further blocking the vibration transmission.

[0080] In addition, during measurement, the grinding mechanism usually stops feeding or is in the finishing stage, at which time the grinding vibration is relatively small. Combined with the vibration isolation structure of this embodiment, it is beneficial to improve the measurement accuracy.

[0081] Working principle: One end of the motor shaft workpiece 5 is clamped on the chuck 4, and the other end is held and fixed by the center 7. The protective component of the measuring component 15 is activated, and the high-pressure dry airflow forms an air curtain in front of the protective cover 18 through the jet pipe 19.

[0082] The rotating spindle 3 drives the workpiece 5 to rotate, and the worktable 8 drives the grinding wheel 12 to approach the workpiece 5 for grinding. At this time, the measuring mechanism is in standby mode, and the slide table 13 is located on the side close to the chuck 4, so as not to interfere with the grinding operation.

[0083] When workpiece 5 approaches its final size, the worktable 8 moves the slide table 13 by the magnetic attraction of the magnet block 33 until the measuring component 15 on the arc frame 14 reaches the position of the measured section. The optical profile sensor, confocal probe, and laser displacement sensor simultaneously collect data on the surface of workpiece 5, acquiring profile feature data such as diameter, roundness, chamfer, undercut groove, and keyway.

[0084] The collected data is transmitted to the industrial controller via a data acquisition card. After processing and analysis, the industrial controller transmits the results to the CNC system. If the measured value reaches the preset target, grinding stops; if the deviation exceeds the tolerance, the feed parameters are automatically adjusted for compensation based on the deviation.

[0085] For multi-step motor shafts, the Z-axis feed mechanism 9 drives the worktable 8 to gradually advance the slide 13, so that the measuring component 15 is aligned with each step position to measure and obtain the dimensional data of the outer circle of each step.

[0086] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A precision machining device for the outer diameter of a motor shaft, comprising a bed (1), a spindle box (2), a chuck (4), a tailstock (6), a center (7), a worktable (8), a Z-axis feed mechanism (9), an X-axis feed mechanism (10), and a grinding mechanism, characterized in that: It also includes a measuring mechanism, which includes a slide table (13) slidably mounted on the top of the bed (1), an arc frame (14) mounted on the slide table (13), and a measuring component (15) mounted on the arc frame (14). The measuring component (15) is used to collect the size and contour data of the motor shaft workpiece. A flexible barrier is provided between the slide (13) and the worktable (8), and the slide (13) is flexibly connected to the worktable (8) through the flexible barrier; A protective component is provided at the lens of the measuring component (15), and the protective component is used to form an air curtain on the front side of the measuring component (15). An mounting base (16) is fixed on the arc-shaped frame (14), a support base (17) is installed inside the mounting base (16), and an adjustment component is provided between the mounting base (16) and the support base (17).

2. The precision machining device for the outer diameter of a motor shaft according to claim 1, characterized in that, The measurement component (15) includes at least one of an optical profile sensor, a confocal probe, and a laser displacement sensor.

3. The precision machining device for the outer diameter of a motor shaft according to claim 1, characterized in that, Two measuring components (15) are provided, symmetrically arranged on both sides of the motor shaft workpiece (5).

4. The precision machining device for the outer diameter of a motor shaft according to claim 1, characterized in that, The protective assembly includes a protective cover (18) disposed in front of the lens and a jet pipe (19) mounted on the protective cover (18). An exhaust slit (20) is provided on the inner side of the jet pipe (19), and the jet direction of the exhaust slit (20) is inclined inward relative to the radial direction of the jet pipe (19).

5. The precision machining device for the outer diameter of a motor shaft according to claim 1, characterized in that, The adjustment assembly includes an adjustment screw (21) rotatably mounted on the mounting base (16) and a connecting block (25) slidably mounted on the mounting base (16). The adjustment screw (21) and the connecting block (25) are threadedly connected. A slot (26) is provided on the connecting block (25). A connecting rod (24) is fixed on the support base (17). The connecting rod (24) is embedded in the slot (26).

6. The precision machining device for the outer diameter of a motor shaft according to claim 5, characterized in that, A gasket (27) is fixed inside the slot (26).

7. The precision machining device for the outer diameter of a motor shaft according to claim 5, characterized in that, The bottom of the connecting block (25) is fitted with an anti-slip pad (28).

8. The precision machining device for the outer diameter of a motor shaft according to claim 1, characterized in that, A connecting part (32) is provided on one side of the slide (13), and a magnet block (33) is fixed on the connecting part (32). The flexible barrier is a flexible barrier strip (34) disposed between the magnet block (33) and the worktable (8).

9. The precision machining device for the outer diameter of a motor shaft according to claim 1, characterized in that, The bottom of the arc frame (14) is fixed with a plug-in part (29), and the top of the slide (13) is provided with a plug-in hole (30).

10. The precision machining device for the outer diameter of a motor shaft according to claim 1, characterized in that, The slide (13) has two positioning slots (31) on its top, and two positioning posts (35) are fixed on the arc frame (14). The positioning posts (35) are inserted into the positioning slots (31).

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