Numerical control milling cutter with cutter dynamic balance rapid measuring function

Abstract

The invention relates to the technical field of numerical control milling cutters, in particular to a numerical control milling cutter with a cutter dynamic balance rapid measuring function, which comprises a dynamic balance measuring device mounted on a numerical control machine tool, and the dynamic balance measuring device comprises a moving table, an axis positioning shell, a dynamic balance detecting device, a balance adjusting device and a speed measuring detecting device; the moving table is mounted beside the numerical control machine tool; the axis positioning shell is fixedly installed at the movable end of the movable table. The dynamic balance detection device is installed in the axis positioning shell, a plurality of detection ends are arranged on the dynamic balance detection device, and the dynamic balance detection device is used for dynamic balance of the milling cutter; the balance adjusting device is installed in the axis positioning shell and used for automatically adjusting a balance screw on the cutter handle. According to the milling cutter dynamic balance measurement device, the comprehensiveness of milling cutter dynamic balance measurement is effectively improved, and meanwhile the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of CNC milling cutter technology, specifically to a CNC milling cutter with a function for rapid dynamic balance measurement of the cutting tool. Background Technology

[0002] In high-end manufacturing fields such as precision machinery, CNC machine tools are rapidly developing towards higher speeds and higher precision, placing extremely stringent demands on the dynamic performance of tooling systems. The dynamic balance of the tooling system (including the tool holder and tool head) directly determines machining accuracy, surface quality, and equipment operational safety.

[0003] Chinese Patent No. CN216502595U discloses a tool holder for connecting a disc milling cutter. This tool holder is a rotating structure, comprising a first connecting part, a balancing part, a connecting rod, and a second connecting part connected sequentially. Multiple balancing holes, centered on the axis of the tool holder and evenly spaced along the circumference of the balancing part, are provided for engaging balancing components. Because of the balancing part on the tool holder and the multiple balancing holes evenly spaced along the circumference of the balancing part, the weight of the tool holder is reduced while improving the dynamic balance between the tool holder and the cutting tool. If the dynamic balance changes due to long-term use, it can be adjusted by adding counterweights within the multiple balancing holes.

[0004] However, the aforementioned patent only achieves the basic function of "passive adjustment" of dynamic balance, lacking the core capability of "active detection" of dynamic balance status, and has significant functional limitations: it cannot detect changes in the imbalance of the tool system caused by initial manufacturing errors, wear during use, uneven coating, and chip adhesion during processing, and can only rely on traditional offline calibration methods for dynamic balance adjustment. This offline calibration mode has many insurmountable drawbacks: First, the process is cumbersome and inefficient, requiring the tool to be removed from the machine tool, installed on a dedicated dynamic balancing measuring instrument to measure the magnitude and phase of the imbalance, and then the counterweight bolts in the balancing hole to be adjusted according to the measurement results. The entire process requires interruption of normal production flow, is time-consuming, and seriously affects production efficiency; Second, the calibration accuracy is constrained by multiple factors, not only relying on the operator's experience and judgment, which is prone to human error, but also the results of offline measurement are only applicable to the environment and clamping state at the time of measurement. When the tool is re-clamped to the machine tool, factors such as differences in clamping force, slight deviations in mating surfaces, and centrifugal deformation under high-speed rotation will disrupt the original balance state, resulting in a significant reduction in the calibration effect. Summary of the Invention

[0005] To address the aforementioned issues, a CNC milling cutter with a rapid dynamic balance measurement function is provided. The dynamic balance measurement device can effectively improve the comprehensiveness of the milling cutter's dynamic balance measurement and simultaneously increase production efficiency.

[0006] To address the problems of existing technologies, this invention provides a CNC milling cutter with a rapid dynamic balance measurement function, comprising a dynamic balance measuring device mounted on a CNC machine tool. The dynamic balance measuring device includes a moving stage, a spindle positioning shell, a dynamic balance detection device, a balance adjustment device, and a speed measuring device. The moving stage is mounted beside the CNC machine tool; the spindle positioning shell is fixedly mounted on the movable end of the moving stage; the dynamic balance detection device is installed inside the spindle positioning shell and has multiple detection ends, and is used for dynamic balancing of the milling cutter; the balance adjustment device is installed inside the spindle positioning shell and is used to automatically adjust the balance screw on the tool holder; the speed measuring device is located below the balance adjustment device and is used to detect the milling cutter's rotational speed.

[0007] Preferably, the top of the spindle positioning housing is provided with multiple docking shafts, and the spindle positioning housing also includes an annular positioning frame fixedly installed on the CNC machine tool. The annular positioning frame is provided with multiple positioning docking holes and multiple straightening guide rails, and the positioning docking holes and straightening guide rails are interconnected.

[0008] Preferably, the dynamic balancing testing device includes a synchronous placement device and a vibration detector; the synchronous placement device is fixedly installed inside the shaft positioning housing, and the synchronous placement device is provided with multiple movable ends; the vibration detector is installed on the moving platform, and the vibration detector is provided with multiple detection ends, which are evenly distributed on the movable ends of the synchronous placement device.

[0009] Preferably, the synchronous placement device includes a limiting mounting plate, a movable telescopic shaft, a locking and snapping mechanism, a synchronous drive plate, and a first rotary drive device; the limiting mounting plate is fixedly mounted on the shaft positioning shell, and the limiting mounting plate is provided with multiple limiting slide rails; multiple movable telescopic shafts are provided and evenly distributed on the limiting slide rails, the movable telescopic shafts are slidably connected to the limiting slide rails, the movable telescopic shafts are provided with multiple mounting holes, and the movable telescopic shafts are also provided with multiple docking guide angles; multiple locking and snapping mechanisms are provided and evenly distributed in the mounting holes of the movable telescopic shafts, and the locking and snapping mechanisms are used to snap and fix the detection end of the vibration detector; the synchronous drive plate is rotatably mounted on the limiting mounting plate, the synchronous drive plate is provided with multiple drive inclined rails, and the drive inclined rails are connected to the movable telescopic shafts; the first rotary drive device is mounted on the outside of the shaft positioning shell, and the drive end of the first rotary drive device is connected to the synchronous drive plate.

[0010] Preferably, the locking and engaging mechanism includes a movable locking plate, a push spring, a first lifting mounting plate, a guide socket, and a first linear actuator; the movable locking plate is slidably installed in the mounting hole, and the movable locking plate is provided with a locking hook; multiple push springs are provided and are evenly distributed between the movable locking plate and the mounting hole; the first lifting mounting plate is slidably installed inside the shaft positioning housing; multiple guide sockets are provided and are evenly distributed on the first lifting mounting plate, and the guide sockets are provided with guide protrusions; the first linear actuator is fixedly installed on the outside of the shaft positioning housing, and the telescopic end of the first linear actuator is fixedly connected to the first lifting mounting plate.

[0011] Preferably, the vibration detector includes a magnetic attraction detection head and a balance analyzer; multiple magnetic attraction detection heads are provided and distributed on the movable telescopic shaft, and the magnetic attraction detection head has multiple positioning holes and multiple docking slots inside; the balance analyzer is fixedly installed on the moving platform and is connected to the magnetic attraction detection head.

[0012] Preferably, the balance adjustment device includes a rotating mounting plate, a recognition camera, a movable bracket, a second linear actuator, an adaptive connector, a second rotary drive, and a third rotary drive. The rotating mounting plate is rotatably mounted inside the shaft positioning housing. The second rotary drive is mounted on the shaft positioning housing, and its output end is connected to the rotating mounting plate. The movable bracket is slidably mounted on the rotating mounting plate. The recognition camera is fixedly mounted on the movable bracket and is used to identify the hole positions of the balance screws. The second linear actuator is fixedly mounted on the rotating mounting plate, and its output end is connected to the movable bracket. The adaptive connector is rotatably mounted on the movable bracket. The third rotary drive is fixedly mounted on the movable bracket, and its output end is connected to the adaptive connector.

[0013] Preferably, the adaptive connector includes a swivel mounting sleeve, a movable connector, and an adaptive spring; the swivel mounting sleeve is swivelly mounted on a movable bracket, and a pressure sensor is provided inside the swivel mounting sleeve; the movable connector is slidably mounted inside the swivel mounting sleeve; and the adaptive spring is disposed between the swivel mounting sleeve and the movable connector.

[0014] Preferably, the speed measuring device includes a ball screw slide, a second lifting mounting plate, and a speed sensor; the ball screw slide is mounted on the shaft positioning housing; the second lifting mounting plate is fixedly mounted on the movable end of the ball screw slide; and the speed sensor is fixedly mounted on the second lifting mounting plate.

[0015] Preferably, the moving table includes a positioning docking seat, a moving trolley, and a moving adjusting arm; the positioning docking seat is fixedly installed on the CNC machine tool; the moving trolley is located on the side of the CNC machine tool; and the moving adjusting arm is installed on the moving trolley.

[0016] The advantages of this invention compared to the prior art are: 1. This invention, through the integrated design of a dynamic balancing measuring device, achieves online active detection and dynamic precise adjustment of the dynamic balance state of the tool system. This effectively overcomes the limitations of traditional tool holders, which can only passively adjust dynamic balance, and significantly improves the stability and controllability of the tool system's dynamic performance. The moving stage and the axial positioning shell in this invention work together to quickly and precisely align the detection components with the tool holder and milling cutter, ensuring precise contact between the detection end of the dynamic balancing measuring device and the surface of the CNC machine tool spindle. Simultaneously, it maintains stable alignment between the speed measuring device and the reflective sticker on the side of the tool holder, providing reliable positioning assurance for accurate data acquisition. During the machining process, the dynamic balancing detection device can collect the vibration amplitude and frequency signals of the spindle caused by the imbalance of the milling cutter in real time, and the speed detection device simultaneously and accurately feeds back the actual speed data of the milling cutter. The two work together to quickly determine whether the dynamic balance status meets the standard. Real-time perception of dynamic balance abnormalities can be achieved without disassembling the tool. This completely solves the technical pain point that the traditional offline calibration mode cannot capture the changes in the unbalance of the tool system caused by manufacturing errors, wear, uneven coating, chip adhesion and other factors in real time, and greatly improves the timeliness and comprehensiveness of dynamic balance measurement.

[0017] 2. This invention significantly optimizes the efficiency and accuracy of dynamic balancing correction for tool systems, effectively reducing quality risks and labor costs in high-precision machining. Compared to the cumbersome process of traditional offline correction, which requires tool disassembly, offline measurement, manual adjustment, and reclamping, this invention can automatically adjust the screw depth or position of the balance screw on the tool holder based on dynamic balancing test data and speed parameters without interrupting the normal production process of the machine tool. This achieves dynamic fine-tuning of the imbalance, and the adjustment can be verified in real time by a testing device until the preset dynamic balancing standard is reached, significantly shortening the dynamic balancing correction cycle and improving production efficiency. Simultaneously, this invention eliminates reliance on operator experience, replacing manual judgment and operation with automated detection and adjustment, effectively avoiding the introduction of human error. Furthermore, detection and adjustment are performed under the actual clamping condition of the tool, avoiding the disruption of the balance state caused by differences in clamping force, mating surface deviation, and high-speed centrifugal deformation during offline measurement and reclamping. This significantly improves the accuracy of dynamic balancing correction, providing a reliable guarantee for high-speed and high-precision machining of CNC machine tools, effectively improving the surface quality of machined parts, and reducing equipment operation safety risks. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of a CNC milling cutter with a rapid dynamic balance measurement function according to the present invention. Figure 1 .

[0019] Figure 2This is a three-dimensional schematic diagram of a CNC milling cutter with a rapid dynamic balance measurement function according to the present invention. Figure 2 .

[0020] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0021] Figure 4 This is a three-dimensional schematic diagram of a dynamic balance measuring device for CNC milling cutters with a rapid dynamic balance measuring function according to the present invention.

[0022] Figure 5 This is a front view of a portion of the dynamic balancing measuring device in a CNC milling cutter with a rapid dynamic balancing function according to the present invention.

[0023] Figure 6 yes Figure 5 Planar sectional view at section BB.

[0024] Figure 7 yes Figure 5 Planar sectional perspective view of the BB section Figure 8 This is a three-dimensional schematic diagram of a dynamic balance testing device for CNC milling cutters with a rapid dynamic balance measurement function according to the present invention.

[0025] Figure 9 This is an exploded view of the movable telescopic shaft and magnetic detection head in a CNC milling cutter with rapid tool dynamic balance measurement function according to the present invention. Figure 1 .

[0026] Figure 10 This is an exploded view of the movable telescopic shaft and magnetic detection head in a CNC milling cutter with rapid tool dynamic balance measurement function according to the present invention. Figure 2 .

[0027] Figure 11 This is a three-dimensional schematic diagram of the balance adjustment device in a CNC milling cutter with a rapid dynamic balance measurement function according to the present invention.

[0028] Figure 12 yes Figure 11 A magnified view of a section at point C.

[0029] The numbers on the map are: 1. CNC machine tool; 11. Tool holder; 111. Balance screw; 12. Milling cutter; 2. Moving table; 21. Positioning docking seat; 22. Moving trolley; 23. Moving adjusting arm; 3. Shaft positioning housing; 31. Dating shaft; 32. Annular positioning frame; 321. Positioning docking hole; 322. Correction guide rail; 4. Dynamic balancing testing device; 41. Synchronous placement device; 411. Limiting mounting plate; 412. Movable telescopic shaft; 4121. Mounting hole; 4122. Dating guide angle; 4123. Locking and snapping mechanism; 4124. Movable clamping plate; 4125. Push spring; 4126. First lifting mounting plate; 4127. Guide socket; 4128. First Linear actuator; 413, Synchronous drive disk; 4131, Drive rail; 414, First rotary drive device; 42, Vibration detector; 421, Magnetic detection head; 4211, Docking slot; 4212, Positioning hole; 422, Balance analyzer; 5, Balance adjustment device; 51, Rotary mounting disk; 52, Recognition camera; 53, Movable bracket; 54, Second linear actuator; 55, Adaptive connector; 551, Rotary mounting sleeve; 552, Movable connector; 56, Second rotary drive device; 57, Third rotary drive device; 6, Speed ​​detection device; 61, Ball screw slide; 62, Second lifting mounting plate; 63, Speed ​​sensor. Detailed Implementation

[0030] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0031] See Figures 1 to 12 As shown, a CNC milling cutter with a rapid dynamic balance measurement function includes a dynamic balance measuring device mounted on a CNC machine tool 1. The dynamic balance measuring device includes a moving stage 2, a spindle positioning shell 3, a dynamic balance detection device 4, a balance adjustment device 5, and a speed measuring device 6. The moving stage 2 is mounted on the side of the CNC machine tool 1. The spindle positioning shell 3 is fixedly mounted on the movable end of the moving stage 2. The dynamic balance detection device 4 is installed inside the spindle positioning shell 3 and has multiple detection ends. The dynamic balance detection device 4 is used for dynamic balancing of the milling cutter 12. The balance adjustment device 5 is installed inside the spindle positioning shell 3 and is used to automatically adjust the balance screw 111 on the tool holder 11. The speed measuring device 6 is located below the balance adjustment device 5 and is used to detect the rotational speed of the milling cutter 12.

[0032] The working end of the CNC machine tool 1 is equipped with a tool holder 11 and a milling cutter 12, and the tool holder 11 is provided with multiple balancing screws 111.

[0033] When dynamic balancing testing is required on the milling cutter 12 on the CNC machine tool 1, the moving stage 2 first drives the axial positioning shell 3, which is fixed to its movable end, to translate until the axial positioning shell 3 is directly below the milling cutter 12, completing the rough positioning before testing. Subsequently, the moving stage 2 further drives the axial positioning shell 3 to rise vertically, so that the axial positioning shell 3 is precisely fitted onto the outside of the tool holder 11 and the milling cutter 12, realizing the coaxial alignment of the testing component and the tool system, and providing positioning assurance for the accuracy of subsequent testing and adjustment.

[0034] After the spindle positioning housing 3 is assembled, the dynamic balancing detection device 4 installed inside it is activated, which drives the multiple detection ends set on it to fit against the surface of the spindle of the CNC machine tool 1, ensuring that the detection ends can accurately collect the spindle vibration signal; at the same time, reflective stickers are pre-attached to the side of the tool holder 11, so that the detection end of the speed measuring device 6 is aligned with the reflective stickers, laying the foundation for accurate detection of the milling cutter 12 speed.

[0035] After the above preparations are completed, the CNC machine tool 1 is started, and the tool holder 11 and the milling cutter 12 are driven to rotate synchronously. During the rotation of the milling cutter 12, the speed measuring and detection device 6 detects and feeds back the actual rotation speed data of the milling cutter 12 in real time by identifying the periodic reflective signal of the reflective sticker. At the same time, if there is a dynamic imbalance problem caused by uneven mass distribution, the periodic centrifugal force generated when it rotates at high speed will be transmitted to the machine tool spindle, causing the spindle system to vibrate. The dynamic balance detection device 4 collects the core signals such as the vibration amplitude and vibration frequency of the spindle in real time through the attached detection end.

[0036] The dynamic balancing detection device 4 performs collaborative analysis on the collected spindle vibration signal and the milling cutter 12 rotation speed data fed back by the speed measuring device 6. Based on the correlation characteristics between centrifugal force, vibration amplitude, and rotation speed, it quickly determines whether the current dynamic balance state of the milling cutter 12 meets the machining requirements. If the detection determines that the dynamic balance is abnormal, i.e., the vibration amplitude exceeds the preset threshold, the balance adjustment device 5 is immediately activated. According to the magnitude and phase data of the imbalance output by the dynamic balancing detection device 4 and the rotation speed parameters fed back by the speed measuring device 6, the balance adjustment device 5 automatically adjusts the screw depth or position of the preset multiple balance screws 111 on the tool holder 11 to achieve dynamic adjustment of the mass distribution of the tool holder 11, thereby controlling the eccentric force generated when the milling cutter 12 rotates at high speed and counteracting the negative impact of the imbalance.

[0037] After the balancing device 5 completes one adjustment, the CNC machine tool 1 is restarted, driving the milling cutter 12 to rotate at high speed. The dynamic balancing detection device 4 and the speed measuring detection device 6 repeat the above detection process to verify the dynamic balance state of the adjusted milling cutter 12. If the verification result still does not meet the preset qualified standard, the balancing device 5 will continue to fine-tune according to the new round of detection data until the vibration signal collected by the dynamic balancing detection device 4 and the speed data fed back by the speed measuring detection device 6 both meet the preset requirements, that is, the milling cutter 12 achieves a qualified dynamic balance state, and the entire detection and adjustment process ends.

[0038] This device achieves rapid and precise alignment of the detection components and the tool system through the coordinated action of the moving stage 2 and the axial positioning shell 3; it enables online rapid determination of the dynamic balance state of the milling cutter 12 by means of synchronous data acquisition and analysis of the dynamic balance detection device 4 and the speed detection device 6; and it completes precise correction of the dynamic imbalance by automatically adjusting the balance screw 111 of the tool holder 11 through the balance adjustment device 5. The dynamic balance can be measured and adjusted without removing the tool from the machine tool, which effectively solves the technical problems of the traditional offline dynamic balance process being cumbersome and having repeated clamping errors. It significantly improves the efficiency and accuracy of tool dynamic balance measurement in CNC milling, while saving labor costs and ensuring the stability of high-speed and high-precision milling.

[0039] See Figures 1 to 4 As shown, the top of the shaft positioning housing 3 is provided with multiple docking shafts 31. The shaft positioning housing 3 also includes an annular positioning frame 32 fixedly installed on the CNC machine tool 1. The annular positioning frame 32 is provided with multiple positioning docking holes 321 and multiple correction guide rails 322. The positioning docking holes 321 and the correction guide rails 322 are interconnected.

[0040] When the CNC milling cutter 12 needs to undergo dynamic balancing testing, and the dynamic balancing testing device 4, balancing adjustment device 5, speed measuring device 6 and the tool system need to be coaxially aligned, the moving table 2 first provides driving power to drive the axial positioning shell 3, which is fixedly installed at its movable end, to move horizontally until the axial positioning shell 3 moves to a position directly below the milling cutter 12. This completes the rough positioning before testing and initially determines the relative position of the axial positioning shell 3 and the tool system, laying the foundation for subsequent precise alignment.

[0041] After the coarse positioning is completed, the moving stage 2 further outputs a drive signal to drive the shaft positioning shell 3 to move upward in the vertical direction. As the shaft positioning shell 3 rises, the multiple docking shafts 31 set on its top move upward synchronously and are gradually inserted into the multiple positioning docking holes 321 preset on the annular positioning frame 32, so as to realize the initial cooperation between the shaft positioning shell 3 and the annular positioning frame 32 and limit the large displacement of the shaft positioning shell 3 in the horizontal direction.

[0042] After the docking shaft 31 is inserted into the positioning docking hole 321, the moving stage 2 drives the shaft positioning shell 3 to rotate around its own axis. During the rotation, the docking shaft 31 inserted into the positioning docking hole 321 gradually enters the correction guide rail 322, which is connected to the positioning docking hole 321, under the rotational force. The correction guide rail 322 applies a limiting and guiding effect to the docking shaft 31 that has entered it through its own preset guide structure, constraining the movement trajectory of the docking shaft 31, and forcing the shaft positioning shell 3 to perform attitude correction and position fine adjustment during the rotation until the docking shaft 31 completes the limited movement along the correction guide rail 322. At this time, the shaft positioning shell 3 achieves precise positioning and remains coaxial with the axis of the tool system. This, in turn, drives the dynamic balance detection device 4, balance adjustment device 5, and speed detection device 6 installed inside it to achieve coaxial alignment with the tool system, ensuring the accuracy of subsequent dynamic balance detection signal acquisition and balance screw 111 adjustment.

[0043] See Figures 4 to 6 As shown, the dynamic balancing testing device 4 includes a synchronous placement device 41 and a vibration detector 42. The synchronous placement device 41 is fixedly installed inside the shaft positioning shell 3 and has multiple movable ends. The vibration detector 42 is installed on the moving stage 2 and has multiple detection ends, which are evenly distributed on the movable ends of the synchronous placement device 41.

[0044] The synchronous placement device 41 is fixedly installed inside the shaft positioning shell 3. Its structure is provided with multiple movable ends, which serve as the mounting and driving carrier for the vibration detector 42. The vibration detector 42 is installed on the moving stage 2. It is equipped with multiple detection ends, and each detection end is evenly distributed on the multiple movable ends of the synchronous placement device 41 to ensure that the detection ends can achieve synchronous action and omnidirectional signal acquisition.

[0045] When the CNC milling cutter 12 enters the dynamic balancing test process, and the spindle positioning shell 3, through the coordinated action of the moving table 2 and the ring positioning frame 32, completes the coaxial alignment with the tool system, the dynamic balancing test device 4 is activated and enters the vibration signal acquisition preparation stage. At this time, the synchronous placement device 41 receives the drive command and drives its movable end to perform synchronous action. Since the multiple detection ends of the vibration detector 42 are all fixed to the movable end of the synchronous placement device 41, each detection end moves synchronously with the movable end until all detection ends are precisely in contact with the outer wall of the CNC machine tool 1 spindle and maintain a stable contact state, avoiding distortion of vibration signal acquisition due to poor contact.

[0046] After the detection end is properly attached to the outer wall of the spindle, the CNC machine tool 1 is started, driving the tool holder 11 and the milling cutter 12 to rotate synchronously at high speed. If there is a dynamic imbalance problem caused by uneven mass distribution, periodic centrifugal force will be generated during its high-speed rotation. This centrifugal force is transmitted to the spindle of the CNC machine tool 1, causing the spindle system to vibrate. At this time, the vibration detector 42 synchronously and in real time collects the core data of the spindle vibration through multiple detection ends attached to the outer wall of the spindle, including key parameters such as vibration amplitude and vibration frequency.

[0047] The vibration detector 42 integrates and processes the collected vibration data, and combines it with the milling cutter 12 rotation speed data synchronously fed back by the speed measuring device 6. Based on the correlation characteristics between centrifugal force, vibration amplitude, and rotation speed, it accurately determines the dynamic balance state of the milling cutter 12. If the integrated vibration data does not exceed the preset threshold, the dynamic balance state of the milling cutter 12 is deemed qualified; if the vibration data exceeds the preset threshold, the milling cutter 12 is deemed to have a dynamic imbalance problem.

[0048] See Figures 6 to 10 As shown, the synchronous placement device 41 includes a limiting mounting plate 411, a movable telescopic shaft 412, a locking and engaging mechanism 4123, a synchronous drive plate 413, and a first rotary drive device 414. The limiting mounting plate 411 is fixedly mounted on the shaft positioning shell 3, and the limiting mounting plate 411 is provided with multiple limiting slide rails. The movable telescopic shaft 412 is provided with multiple shafts and is evenly distributed on the limiting slide rails. The movable telescopic shaft 412 is slidably connected to the limiting slide rails. The movable telescopic shaft 412 is provided with multiple mounting holes 4121 and multiple docking guide angles 412. 2; Multiple locking and snapping mechanisms 4123 are provided and evenly distributed in the mounting holes 4121 of the movable telescopic shaft 412. The locking and snapping mechanisms 4123 are used to snap and fix the detection end of the vibration detector 42; The synchronous drive disk 413 is rotatably mounted on the limiting mounting disk 411. The synchronous drive disk 413 is provided with multiple drive rails 4131, and the drive rails 4131 are connected to the movable telescopic shaft 412; The first rotary drive device 414 is mounted on the outside of the shaft positioning shell 3, and the drive end of the first rotary drive device 414 is connected to the synchronous drive disk 413.

[0049] The limiting mounting plate 411 is fixedly installed on the inner wall of the shaft positioning shell 3, serving as the installation reference for the entire synchronous placement device 41. Multiple limiting slide rails are evenly distributed on its surface, providing guidance and limiting support for the movable telescopic shaft 412. Multiple movable telescopic shafts 412 are provided, each corresponding to one of the limiting slide rails and slidably connected, allowing radial telescopic movement along the limiting slide rails. Multiple mounting holes 4121 are pre-set on the movable telescopic shaft 412 for assembling locking and engaging mechanisms 4123. Each shaft has a docking guide angle 4122 at its end for precise guidance and docking with the detection end of the vibration detector 42. Multiple locking and engaging mechanisms 4123 are correspondingly arranged and respectively embedded... The mounting holes 4121 of each movable telescopic shaft 412 are installed, and their core function is to achieve detachable snap-fit ​​fixation of the detection end of the vibration detector 42. The synchronous drive disk 413 is rotatably mounted on the limiting mounting disk 411. Its disk surface is provided with multiple drive inclined rails 4131 adapted to the movable telescopic shaft 412. The drive inclined rails 4131 are driven and connected to the end of the movable telescopic shaft 412 to convert their own rotational motion into the radial extension and retraction motion of the movable telescopic shaft 412. The first rotary drive device 414 is fixedly installed on the outside of the shaft positioning shell 3. Its drive end is driven and connected to the synchronous drive disk 413 to provide power for the rotation of the synchronous drive disk 413. The detection end of the vibration detector 42 is detachably fixedly connected to the movable telescopic shaft 412 through the locking snap-fit ​​mechanism 4123 on each movable telescopic shaft 412.

[0050] When the CNC milling cutter 12 enters the dynamic balancing test process, and the axial positioning shell 3 completes coaxial alignment with the tool system, the synchronous placement device 41 is activated, entering the contact drive stage of the vibration detector 42 detection end. At this time, the first rotary drive device 414 receives the drive command, outputs rotational power and transmits it to the synchronous drive disk 413, driving the synchronous drive disk 413 to rotate uniformly around its own axis; during the rotation of the synchronous drive disk 413, multiple drive inclined rails 4131 on its disk surface rotate synchronously. Since the drive inclined rails 4131 are connected to the movable telescopic shaft 412, the rotating drive inclined rails 4131 apply radial driving force to the movable telescopic shaft 412, forcing multiple movable telescopic shafts 412 to synchronously extend radially along the limiting slide rail on the limiting mounting disk 411.

[0051] When the movable telescopic shaft 412 extends synchronously, the detection end of the vibration detector 42 fixed at its end moves radially along with it until all detection ends are precisely in contact with the outer wall of the CNC machine tool 1 spindle; after the detection ends are in contact with the outer wall of the spindle, they are adsorbed and fixed to the outer wall of the spindle through the adsorption structure to ensure stable contact during the detection process. Subsequently, the locking mechanism 4123 receives an unlocking command, releasing the locking and fixing of the detection end of the vibration detector 42, thus separating the detection end from the movable telescopic shaft 412. Immediately afterwards, the first rotary drive device 414 outputs power in the reverse direction, driving the synchronous drive disk 413 to rotate in the reverse direction, driving the inclined rail 4131 to act synchronously and in the reverse direction on the movable telescopic shaft 412, causing multiple movable telescopic shafts 412 to synchronously and radially reset along the limit slide rail until the movable telescopic shaft 412 is completely detached from the detection end of the vibration detector 42. At this time, the detection end of the vibration detector 42 is independently attached to the outer wall of the spindle of the CNC machine tool 1, avoiding interference from the vibration of the movable telescopic shaft 412 and other components of the device on the detection end, effectively improving the accuracy and reliability of vibration signal acquisition, and providing a guarantee for the accurate determination of the dynamic balance state of the milling cutter 12.

[0052] After the vibration detector 42 completes vibration signal acquisition and dynamic balance testing, the synchronous placement device 41 enters the reset and retraction stage of the detection end. At this time, the first rotary drive device 414 drives the synchronous drive disk 413 to rotate in the forward direction again, causing multiple movable telescopic shafts 412 to extend radially synchronously along the limit slide rail. The docking guide angle 4122 at the end of the movable telescopic shaft 412 first contacts the detection end of the vibration detector 42. Through the guiding effect of the guide angle, the movable telescopic shaft 412 and the detection end are accurately guided and positioned to ensure that the two are aligned and docked. After docking, the locking and clamping mechanism 4123 receives the locking command and clamps and fixes the detection end of the vibration detector 42 again, realizing a stable connection between the detection end and the movable telescopic shaft 412. Subsequently, the first rotary drive device 414 drives the synchronous drive disk 413 to rotate in the reverse direction, causing the movable telescopic shaft 412 to synchronously and radially reset. The movable telescopic shaft 412 synchronously drives the detection end of the vibration detector 42 to detach from the outer wall of the CNC machine tool 1 spindle, completing the retraction and reset of the detection end, and preparing for the next dynamic balance test.

[0053] See Figures 6 to 10As shown, the locking and engaging mechanism 4123 includes a movable locking plate 4124, a push spring 4125, a first lifting mounting plate 4126, a guide socket 4127, and a first linear actuator 4128. The movable locking plate 4124 is slidably installed in the mounting hole 4121, and a hook is provided on the movable locking plate 4124. Multiple push springs 4125 are provided and are evenly distributed between the movable locking plate 4124 and the mounting hole 4121. The first lifting mounting plate 4126 is slidably installed inside the shaft positioning housing 3. Multiple guide sockets 4127 are provided and are evenly distributed on the first lifting mounting plate 4126, and a guide protrusion is provided on the guide socket 4127. The first linear actuator 4128 is fixedly installed on the outside of the shaft positioning housing 3, and the telescopic end of the first linear actuator 4128 is fixedly connected to the first lifting mounting plate 4126.

[0054] The movable locking plate 4124 is slidably fitted into the mounting hole 4121 of the movable telescopic shaft 412, and its end is provided with a hook structure for engaging with the detection end of the vibration detector 42; multiple push springs 4125 are provided and evenly distributed between the movable locking plate 4124 and the inner wall of the mounting hole 4121, and apply continuous pushing force to the movable locking plate 4124 in its natural state, providing power support for the locking action of the movable locking plate 4124; the first lifting mounting plate 4126 is slidably fitted into the shaft positioning shell 3, and can move along the shaft. The inner wall of the positioning shell 3 moves vertically up and down; multiple guide sockets 4127 are provided and evenly distributed on the first lifting mounting plate 4126, corresponding one-to-one with the movable telescopic shaft 412 and the movable locking plate 4124. The guide sockets 4127 are provided with guide protrusions to apply pressure to the movable locking plate 4124 to unlock; the first linear actuator 4128 is fixedly installed on the outside of the shaft positioning shell 3, and its telescopic end is fixedly connected to the first lifting mounting plate 4126 to provide power for the lifting movement of the first lifting mounting plate 4126.

[0055] After the synchronous placement device 41 completes the guiding docking of the vibration detector 42's detection end, the locking and snapping mechanism 4123 enters the locking state, achieving a fixed connection between the vibration detector 42's detection end and the movable telescopic shaft 412. At this time, the push spring 4125 is in a naturally extended state, causing the movable locking plate 4124 to slide along the mounting hole 4121 until the snapping end of the movable locking plate 4124 is inserted into the corresponding slot of the vibration detector 42's detection end. The hook on the movable locking plate 4124 precisely engages with the vibration detector 42's detection end, thereby achieving a detachable locking and fixing of the vibration detector 42's detection end and the movable telescopic shaft 412, ensuring that when the movable telescopic shaft 412 drives the detection end to extend and retract, the connection between the two is stable and there is no relative displacement.

[0056] When the synchronous placement device 41 drives the vibration detector 42 to precisely adhere to and fix the detection end of the CNC machine tool 1 spindle, the locking and latching mechanism 4123 receives the unlocking command and enters the unlocking state to release the fixation of the detection end. At this time, the first linear driver 4128 receives the drive signal, its telescopic end extends and drives the first lifting mounting plate 4126 to rise vertically along the inner wall of the axial positioning shell 3. The first lifting mounting plate 4126 synchronously drives the multiple guide sockets 4127 arranged on it to move upward together until the guide protrusions on each guide socket 4127 precisely contact the end of the corresponding movable latch plate 4124 and apply pressure.

[0057] The guiding protrusion's resistance to the movable plate 4124 overcomes the pushing force of the push spring 4125, forcing the movable plate 4124 to slide inward along the mounting hole 4121. At the same time, it compresses the push spring 4125, causing the push spring 4125 to undergo elastic deformation and store elastic potential energy. During the inward sliding process of the movable plate 4124, the hook at its end simultaneously disengages from the detection end of the vibration detector 42, thereby canceling the locking and fixing of the detection end and realizing the separation of the detection end from the movable telescopic shaft 412. This provides conditions for the movable telescopic shaft 412 to reset and for the detection end to independently adhere to the outer wall of the main shaft, avoiding the vibration of the movable telescopic shaft 412 and other components of the device from interfering with the vibration signal acquisition of the detection end.

[0058] See Figures 4 to 10 As shown, the vibration detector 42 includes a magnetic attraction detection head 421 and a balance analyzer 422; multiple magnetic attraction detection heads 421 are provided and distributed on the movable telescopic shaft 412, and multiple positioning holes 4212 and multiple docking slots 4211 are provided inside the magnetic attraction detection head 421; the balance analyzer 422 is fixedly installed on the moving stage 2 and is connected to the magnetic attraction detection head 421.

[0059] Multiple magnetic attraction detection heads 421 are provided, all of which are detachably assembled onto the movable telescopic shaft 412 via the locking and snapping mechanism 4123 of the synchronous placement device 41. Each head has multiple pre-set positioning holes 4212 and multiple docking slots 4211, and externally integrates an electromagnetic adsorption structure and a vibration collector. The positioning holes 4212 are used to precisely mate with the docking guide angle 4122 at the end of the movable telescopic shaft 412, achieving guided docking between the magnetic attraction detection head 421 and the movable telescopic shaft 412. The docking slots 4211 are used to adapt to the hooks of the movable plate 4124 of the locking and snapping mechanism 4123 on the movable telescopic shaft 412, achieving detachable snap-fit ​​fixing between the magnetic attraction detection head 421 and the movable telescopic shaft 412. The electromagnetic adsorption structure is used to adsorb and fix the magnetic attraction detection head 421 to the outer wall of the CNC machine tool 1 spindle, ensuring stable contact during vibration acquisition. The vibration collector is used to collect the core parameters of the spindle vibration in real time. The balance analyzer 422 is fixedly installed on the moving stage 2 and establishes signal communication with multiple magnetic attraction detection heads 421. It is used to receive, integrate and analyze the vibration data transmitted by each magnetic attraction detection head 421 and analyze the dynamic balance when the milling cutter 12 rotates.

[0060] See Figures 4 to 11 As shown, the balance adjustment device 5 includes a rotating mounting plate 51, a recognition camera 52, a movable bracket 53, a second linear actuator 54, an adaptive connector 55, a second rotary drive device 56, and a third rotary drive device 57. The rotating mounting plate 51 is rotatably mounted inside the shaft positioning housing 3. The second rotary drive device 56 is mounted on the shaft positioning housing 3, and its output end is connected to the rotating mounting plate 51. The movable bracket 53 is slidably mounted on the rotating mounting plate 51. The recognition camera 52 is fixedly mounted on the movable bracket 53 and is used to identify the hole position of the balance screw 111. The second linear actuator 54 is fixedly mounted on the rotating mounting plate 51, and its output end is connected to the movable bracket 53. The adaptive connector 55 is rotatably mounted on the movable bracket 53. The third rotary drive device 57 is fixedly mounted on the movable bracket 53, and its output end is connected to the adaptive connector 55.

[0061] When the dynamic balancing detection device 4 and the speed measuring detection device 6 complete their collaborative detection, analyze the dynamic balance data of the milling cutter 12, and determine that the milling cutter 12 has a dynamic imbalance problem, the balancing adjustment device 5 is activated, entering the adjustment process of the balancing screw 111. At this time, the balancing adjustment device 5 receives the magnitude and phase data of the imbalance output by the dynamic balancing detection device 4, as well as the speed parameters of the milling cutter 12 fed back by the speed measuring detection device 6. Combining this with the preset control logic, it determines the position and adjustment amount of the balancing screw 111 that needs to be adjusted, and then sends a drive command to the second rotary drive device 56.

[0062] After receiving the command, the second rotary drive device 56 outputs rotational power and transmits it to the rotating mounting plate 51, causing the rotating mounting plate 51 to rotate uniformly around its own axis. Simultaneously, the rotating mounting plate 51 drives the identification camera 52, the movable bracket 53, the second linear actuator 54, the adaptive connector 55, and the third rotary drive device 57 to rotate circumferentially. During rotation, the identification camera 52 continuously collects image information from the surface of the tool holder 11, identifies and positions the hole position of the balance screw 111 in real time, and feeds back the position signal to the control unit. The control unit adjusts the operating state of the second rotary drive device 56 according to the feedback signal until the rotating mounting plate 51 stops rotating. The adaptive connector 55 maintains coaxial alignment with the target balance screw 111, ensuring accurate subsequent docking.

[0063] After the adaptive connector 55 and the balance screw 111 are aligned, the second linear actuator 54 receives the drive command, outputs axial drive force and pushes the movable bracket 53 to slide horizontally along the surface of the rotating mounting plate 51. The movable bracket 53 simultaneously drives the adaptive connector 55 and the third rotary drive device 57 to move together toward the balance screw 111 until the adaptive connector 55 is precisely inserted into the balance screw 111, achieving a firm fit between the two and providing a guarantee for subsequent power transmission.

[0064] After the adaptive connector 55 is inserted and engaged with the balance screw 111, the third rotary drive device 57 receives the adjustment command sent by the control unit, outputs rotational power and transmits it to the adaptive connector 55, causing the adaptive connector 55 to rotate around its own axis; the adaptive connector 55 transmits rotational power to the balance screw 111 through the insertion and engagement with the balance screw 111, causing the balance screw 111 to rotate synchronously, so that the balance screw 111 is screwed in or out.

[0065] Adjusting the horizontal displacement of the balance screw 111 changes the mass distribution of the tool holder 11, thereby regulating the eccentric force generated when the end mill 12 rotates at high speed, gradually offsetting the dynamic imbalance caused by uneven mass distribution. When the balance screw 111 is adjusted to the preset position, the third rotary drive device 57 stops operating, and the second linear drive 54 reverses its movement, driving the movable bracket 53 and the adaptive connector 55 to reset, causing the adaptive connector 55 to disengage from the balance screw 111. If multiple balance screws 111 need to be adjusted, the above positioning, docking, and adjustment process is repeated until all target balance screws 111 are adjusted.

[0066] See Figure 11 and Figure 12As shown, the adaptive connector 55 includes a rotating mounting sleeve 551, a movable connector 552, and an adaptive spring; the rotating mounting sleeve 551 is rotatably mounted on the movable bracket 53, and a pressure sensor is provided inside the rotating mounting sleeve 551; the movable connector 552 is slidably mounted inside the rotating mounting sleeve 551; the adaptive spring is disposed between the rotating mounting sleeve 551 and the movable connector 552.

[0067] Once the balancing adjustment device 5 has completed the positioning of the balancing screw 111 and the adaptive connector 55 is coaxially aligned with the target balancing screw 111, the second linear actuator 54 is activated, pushing the movable bracket 53 to move the adaptive connector 55 horizontally towards the balancing screw 111, entering the docking stage. At this time, the adaptive spring is in its natural extended state, applying a pushing force towards the balancing screw 111 to the movable connector 552, pushing the movable connector 552 out of the rotating mounting sleeve 551 until the end of the movable connector 552 contacts the docking part of the balancing screw 111.

[0068] If the movable connector 552 and the balance screw 111 are precisely aligned, the movable connector 552 will be smoothly inserted into the corresponding mounting slot of the balance screw 111 under the pushing force of the adaptive spring, thus achieving precise alignment. At this time, the pressure of the adaptive spring remains stable, and the pressure value detected by the pressure sensor inside the rotating mounting sleeve 551 is within the preset normal threshold range, indicating that the alignment is qualified, laying the foundation for subsequent power transmission.

[0069] If a misalignment exists, the end of the movable connector 552 cannot be smoothly inserted into the balance screw 111. The movable connector 552 will be subjected to a reverse pressure from the balance screw 111. This pressure overcomes the pushing force of the adaptive spring, forcing the movable connector 552 to retract into the rotating mounting sleeve 551 and compressing the adaptive spring, causing it to elastically deform and gradually increase the pressure. When the pressure sensor inside the rotating mounting sleeve 551 detects that the pressure value of the adaptive spring exceeds the preset normal threshold, it immediately determines that the movable connector 552 and the balance screw 111 are not accurately aligned and feeds back the deviation signal to the control unit.

[0070] After receiving the deviation signal, the control unit controls the second linear driver 54 to stop feeding and simultaneously starts the third rotary drive device 57. The third rotary drive device 57 outputs rotational power and transmits it to the rotating mounting sleeve 551, causing the rotating mounting sleeve 551 to rotate around its own axis. The rotating mounting sleeve 551 synchronously drives the internal movable joint 552 and the adaptive spring to rotate together, and finely adjusts the docking angle of the movable joint 552.

[0071] During the rotation of the movable coupling 552, the adaptive spring continuously applies a pushing force to the movable coupling 552, ensuring that the end of the movable coupling 552 remains in contact with the balance screw 111. When the movable coupling 552 rotates to an angle suitable for mating with the balance screw 111, the mating deviation is eliminated. Under the pushing force of the adaptive spring, the movable coupling 552 quickly extends out of the rotating mounting sleeve 551 and inserts into the balance screw 111, completing the precise mating. At this point, the pressure of the adaptive spring returns to the normal threshold range, the pressure sensor detects a normal pressure signal, and sends back a mating pass signal. The third rotary drive device 57 stops rotating, and the mating process is complete.

[0072] After the docking is successful, the third rotary drive device 57 is started again, outputting rotational power and transmitting it to the movable coupling 552 through the rotating mounting sleeve 551, causing the movable coupling 552 to rotate synchronously; the movable coupling 552 transmits rotational power to the balance screw 111 through the insertion and engagement with the balance screw 111, causing the balance screw 111 to rotate synchronously, realizing the adjustment of the balance screw 111 by screwing it in or out, thereby changing the mass distribution of the tool holder 11 and completing the correction of the dynamic imbalance of the milling cutter 12.

[0073] See Figures 5 to 7 As shown, the speed measuring device 6 includes a ball screw slide 61, a second lifting mounting plate 62, and a speed sensor 63; the ball screw slide 61 is mounted on the shaft positioning housing 3; the second lifting mounting plate 62 is fixedly mounted on the movable end of the ball screw slide 61; and the speed sensor 63 is fixedly mounted on the second lifting mounting plate 62.

[0074] When the CNC milling cutter 12 enters the dynamic balancing test process, and the spindle positioning housing 3, through its cooperation with the moving stage 2, completes coaxial alignment with the tool system and is precisely fitted onto the outside of the tool holder 11 and the milling cutter 12, the speed measurement device 6 is activated, entering the speed measurement preparation stage. At this time, the operator pre-affixes reflective identification stickers to the rotation area of ​​the milling cutter 12. These reflective stickers serve as signal markers for speed measurement, used in conjunction with the speed sensor 63 to achieve accurate speed identification.

[0075] After the reflective sticker is pasted, the ball screw slide 61 receives the drive command, starts and drives its movable end to make vertical lifting and lowering movements. Since the second lifting mounting plate 62 is fixedly connected to the movable end of the ball screw slide 61, the speed sensor 63 makes vertical displacement adjustment synchronously with the second lifting mounting plate 62. Through the precise drive of the ball screw slide 61, the height position of the speed sensor 63 is gradually adjusted until the detection end of the speed sensor 63 is relatively aligned with the identification reflective sticker on the side of the tool holder 11, and the distance between the detection end and the reflective sticker is within the optimal detection range of the speed sensor 63, ensuring the accuracy of speed signal acquisition and avoiding speed detection distortion due to position deviation.

[0076] After the speed sensor 63 is positioned correctly, the CNC machine tool 1 is started, driving the tool holder 11 and the milling cutter 12 to rotate synchronously at high speed. During the rotation of the milling cutter 12, the reflective sticker on the side of the tool holder 11 moves in a circular motion along with the tool holder 11, forming a periodic reflective signal. The speed sensor 63 captures the periodic reflective signal reflected by the reflective sticker in real time, converts the reflective signal into an electrical signal through the built-in signal processing module, and calculates the actual rotational speed of the milling cutter 12 based on the length of the period of the reflective signal.

[0077] The speed sensor 63 collects the real-time speed data of the milling cutter 12 and synchronously feeds it back to the balance analyzer 422 of the dynamic balance detection device 4, and integrates it with the spindle vibration signal collected by the dynamic balance detection device 4. Based on the correlation characteristics between centrifugal force, vibration amplitude, and speed, the dynamic balance detection device 4 combines the speed data and vibration data to accurately determine the dynamic balance state of the milling cutter 12.

[0078] See Figures 2 to 4 As shown, the mobile stage 2 includes a positioning docking seat 21, a mobile trolley 22, and a mobile adjusting arm 23; the positioning docking seat 21 is fixedly installed on the CNC machine tool 1; the mobile trolley 22 is located on the side of the CNC machine tool 1; and the mobile adjusting arm 23 is installed on the mobile trolley 22.

[0079] The positioning docking seat 21 is fixedly installed on the CNC machine tool 1, serving as a precise positioning reference for the moving trolley 22. It is used to achieve rigid docking between the moving trolley 22 and the CNC machine tool 1, ensuring the overall stability of the moving table 2 after positioning. The moving trolley 22 is set on the side of the CNC machine tool 1, serving as the carrier and moving platform for the moving adjusting arm 23, the shaft positioning shell 3, and the entire dynamic balancing measuring device, and has movable characteristics. The moving adjusting arm 23 is fixedly installed on the moving trolley 22, and its movable end is fixedly connected to the shaft positioning shell 3. Its core function is to precisely adjust the spatial position of the shaft positioning shell 3, realizing the coarse positioning and coaxial alignment of the shaft positioning shell 3 and the tool system.

[0080] When dynamic balancing of milling cutter 12 needs to be performed on CNC machine tools 1 in different areas, the moving table 2 initiates the overall movement process. At this time, the moving trolley 22 moves horizontally by relying on its own movable structure, simultaneously driving the moving adjusting arm 23, the axis positioning shell 3, and the dynamic balancing detection device 4, the balance adjustment device 5, and the speed measuring detection device 6 installed on it to move together until it moves to the side of the target CNC machine tool 1, realizing the initial alignment of the dynamic balancing measuring device with the target inspection machine tool, adapting to the inspection needs of CNC machine tools 1 in different areas, and improving the versatility of the device.

[0081] After the mobile trolley 22 moves to the side of the target CNC machine tool 1, it enters the precision positioning process. By adjusting the posture of the mobile trolley 22, it achieves precise docking with the preset positioning docking seat 21 on the CNC machine tool 1. After docking, a locking structure is used to fix the two together, completing the rigid positioning of the mobile trolley 22. After the mobile trolley 22 is positioned and fixed, its overall position remains stable, thereby ensuring the stability of the position of the movable adjusting arm 23, the shaft positioning shell 3, and various detection and adjustment components carried on it, providing structural guarantee for the accurate implementation of subsequent dynamic balancing detection and adjustment work.

[0082] After the mobile trolley 22 completes its positioning, the mobile stage 2 enters the position adjustment process of the spindle positioning shell 3, with the mobile adjusting arm 23 performing the specific adjustment actions. According to the position requirements of the dynamic balance test, the mobile adjusting arm 23 receives the drive command and, through its extension, retraction, and translational movements, precisely adjusts the spatial position of the spindle positioning shell 3: first, it moves the spindle positioning shell 3 horizontally until it is directly below the target milling cutter 12, completing the rough positioning before testing and initially determining the relative position of the spindle positioning shell 3 and the tool system; subsequently, the mobile adjusting arm 23 further drives the spindle positioning shell 3 to rise vertically, precisely fitting the spindle positioning shell 3 onto the outside of the tool holder 11 and the milling cutter 12, achieving coaxial alignment between the testing component and the tool system, providing positioning support for the subsequent precise operation of the dynamic balance testing device 4, the balance adjustment device 5, and the speed measuring device 6.

[0083] After the dynamic balance test and adjustment of the milling cutter 12 of the target CNC machine tool 1 is completed, the fixed connection between the moving trolley 22 and the positioning docking seat 21 is released. The moving trolley 22 can then move again, driving the entire dynamic balance measuring device to other CNC machine tools 1 in other areas, repeating the above "movement-positioning-adjustment" process to achieve dynamic balance test and adaptation of the milling cutter 12 of multiple CNC machine tools 1 in multiple areas.

[0084] Specific working principle: When dynamic balancing testing is required on the milling cutter 12 on the CNC machine tool 1, the moving stage 2 first drives the axial positioning shell 3, which is fixed to its movable end, to translate until the axial positioning shell 3 is directly below the milling cutter 12, completing the rough positioning before testing. Subsequently, the moving stage 2 further drives the axial positioning shell 3 to rise vertically, so that the axial positioning shell 3 is precisely fitted onto the outside of the tool holder 11 and the milling cutter 12, realizing the coaxial alignment of the testing component and the tool system, and providing positioning assurance for the accuracy of subsequent testing and adjustment.

[0085] After the spindle positioning housing 3 is assembled, the dynamic balancing detection device 4 installed inside it is activated, which drives the multiple detection ends set on it to fit against the surface of the spindle of the CNC machine tool 1, ensuring that the detection ends can accurately collect the spindle vibration signal; at the same time, reflective stickers are pre-attached to the side of the tool holder 11, so that the detection end of the speed measuring device 6 is aligned with the reflective stickers, laying the foundation for accurate detection of the milling cutter 12 speed.

[0086] After the above preparations are completed, the CNC machine tool 1 is started, and the tool holder 11 and the milling cutter 12 are driven to rotate synchronously. During the rotation of the milling cutter 12, the speed measuring and detection device 6 detects and feeds back the actual rotation speed data of the milling cutter 12 in real time by identifying the periodic reflective signal of the reflective sticker. At the same time, if there is a dynamic imbalance problem caused by uneven mass distribution, the periodic centrifugal force generated when it rotates at high speed will be transmitted to the machine tool spindle, causing the spindle system to vibrate. The dynamic balance detection device 4 collects the core signals such as the vibration amplitude and vibration frequency of the spindle in real time through the attached detection end.

[0087] The dynamic balancing detection device 4 performs collaborative analysis on the collected spindle vibration signal and the milling cutter 12 rotation speed data fed back by the speed measuring device 6. Based on the correlation characteristics between centrifugal force, vibration amplitude, and rotation speed, it quickly determines whether the current dynamic balance state of the milling cutter 12 meets the machining requirements. If the detection determines that the dynamic balance is abnormal, i.e., the vibration amplitude exceeds the preset threshold, the balance adjustment device 5 is immediately activated. According to the magnitude and phase data of the imbalance output by the dynamic balancing detection device 4 and the rotation speed parameters fed back by the speed measuring device 6, the balance adjustment device 5 automatically adjusts the screw depth or position of the preset multiple balance screws 111 on the tool holder 11 to achieve dynamic adjustment of the mass distribution of the tool holder 11, thereby controlling the eccentric force generated when the milling cutter 12 rotates at high speed and counteracting the negative impact of the imbalance.

[0088] After the balancing device 5 completes one adjustment, the CNC machine tool 1 is restarted, driving the milling cutter 12 to rotate at high speed. The dynamic balancing detection device 4 and the speed measuring detection device 6 repeat the above detection process to verify the dynamic balance state of the adjusted milling cutter 12. If the verification result still does not meet the preset qualified standard, the balancing device 5 will continue to fine-tune according to the new round of detection data until the vibration signal collected by the dynamic balancing detection device 4 and the speed data fed back by the speed measuring detection device 6 both meet the preset requirements, that is, the milling cutter 12 achieves a qualified dynamic balance state, and the entire detection and adjustment process ends.

[0089] This device achieves rapid and precise alignment of the detection components and the tool system through the coordinated action of the moving stage 2 and the axial positioning shell 3; it enables online rapid determination of the dynamic balance state of the milling cutter 12 by means of synchronous data acquisition and analysis of the dynamic balance detection device 4 and the speed detection device 6; and it completes precise correction of the dynamic imbalance by automatically adjusting the balance screw 111 of the tool holder 11 through the balance adjustment device 5. The dynamic balance can be measured and adjusted without removing the tool from the machine tool, which effectively solves the technical problems of the traditional offline dynamic balance process being cumbersome and having repeated clamping errors. It significantly improves the efficiency and accuracy of tool dynamic balance measurement in CNC milling, while saving labor costs and ensuring the stability of high-speed and high-precision milling.

[0090] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A CNC milling cutter with a rapid dynamic balance measurement function, comprising a dynamic balance measuring device mounted on a CNC machine tool (1), characterized in that, The dynamic balancing measuring device includes a moving stage (2), a shaft positioning shell (3), a dynamic balancing detection device (4), a balancing adjustment device (5), and a speed measuring detection device (6). The movable stage (2) is installed beside the CNC machine tool (1); The axial positioning housing (3) is fixedly installed on the movable end of the moving platform (2); The dynamic balancing test device (4) is installed inside the shaft positioning shell (3). The dynamic balancing test device (4) is provided with multiple test ends. The dynamic balancing test device (4) is used for dynamic balancing of the milling cutter (12). The balance adjustment device (5) is installed inside the shaft positioning housing (3). The balance adjustment device (5) is used to automatically adjust the balance screw (111) on the tool holder (11). The speed measuring device (6) is located below the balance adjustment device (5) and is used to detect the rotational speed of the milling cutter (12).

2. A CNC milling cutter with rapid dynamic balance measurement function according to claim 1, characterized in that, The top of the axial positioning housing (3) is provided with multiple docking shafts (31). The axial positioning housing (3) also includes an annular positioning frame (32) fixedly installed on the CNC machine tool (1). The annular positioning frame (32) is provided with multiple positioning docking holes (321) and multiple correction guide rails (322). The positioning docking holes (321) and the correction guide rails (322) are interconnected.

3. A CNC milling cutter with rapid dynamic balance measurement function according to claim 2, characterized in that, The dynamic balancing detection device (4) includes a synchronous placement device (41) and a vibration detector (42). The synchronous placement device (41) is fixedly installed inside the shaft positioning shell (3), and the synchronous placement device (41) is provided with multiple movable ends; The vibration detector (42) is installed on the moving platform (2). The detection end of the vibration detector (42) is provided with multiple points and is evenly distributed on the moving end of the synchronous placement device (41).

4. A CNC milling cutter with rapid dynamic balance measurement function according to claim 3, characterized in that, The synchronous placement device (41) includes a limiting mounting plate (411), a movable telescopic shaft (412), a locking and snapping mechanism (4123), a synchronous drive plate (413), and a first rotary drive device (414). The limiting mounting plate (411) is fixedly mounted on the shaft positioning shell (3), and the limiting mounting plate (411) is provided with multiple limiting slide rails; Multiple movable telescopic shafts (412) are provided and evenly distributed on the limiting slide rail. The movable telescopic shafts (412) are slidably connected to the limiting slide rail. Multiple mounting holes (4121) are provided on the movable telescopic shafts (412). Multiple docking guide angles (4122) are also provided on the movable telescopic shafts (412). Multiple locking and snapping mechanisms (4123) are provided and are evenly distributed in the mounting holes (4121) of the movable telescopic shaft (412). The locking and snapping mechanisms (4123) are used to snap and fix the detection end of the vibration detector (42). The synchronous drive disk (413) is rotatably mounted on the limit mounting disk (411). The synchronous drive disk (413) is provided with multiple drive rails (4131), and the drive rails (4131) are connected to the movable telescopic shaft (412). The first rotary drive device (414) is installed on the outside of the shaft positioning shell (3), and the drive end of the first rotary drive device (414) is connected to the synchronous drive disk (413) for transmission.

5. A CNC milling cutter with rapid dynamic balance measurement function according to claim 4, characterized in that, The locking mechanism (4123) includes a movable locking plate (4124), a push spring (4125), a first lifting mounting plate (4126), a guide socket (4127), and a first linear actuator (4128). The movable plate (4124) is slidably installed in the mounting hole (4121), and the movable plate (4124) is provided with a hook; Multiple push springs (4125) are provided and are evenly distributed between the movable retaining plate (4124) and the mounting hole (4121); The first lifting mounting plate (4126) is slidably mounted inside the shaft positioning shell (3); Multiple guide sockets (4127) are provided and are evenly distributed on the first lifting mounting plate (4126). Guide protrusions are provided on the guide sockets (4127). The first linear actuator (4128) is fixedly installed on the outside of the shaft positioning housing (3), and the telescopic end of the first linear actuator (4128) is fixedly connected to the first lifting mounting plate (4126).

6. A CNC milling cutter with rapid dynamic balance measurement function according to claim 4, characterized in that, The vibration detector (42) includes a magnetic detection head (421) and a balance analyzer (422). Multiple magnetic suction detection heads (421) are provided and distributed on the movable telescopic shaft (412). Multiple positioning holes (4212) and multiple docking slots (4211) are provided inside the magnetic suction detection head (421). The balance analyzer (422) is fixedly installed on the mobile stage (2), and the balance analyzer (422) is connected to the magnetic detection head (421).

7. A CNC milling cutter with rapid dynamic balance measurement function according to claim 1, characterized in that, The balance adjustment device (5) includes a rotating mounting plate (51), an identification camera (52), a movable bracket (53), a second linear actuator (54), an adaptive connector (55), a second rotary drive (56), and a third rotary drive (57). The rotating mounting plate (51) is rotatably mounted inside the shaft positioning housing (3); The second rotary drive device (56) is mounted on the shaft positioning housing (3), and the output end of the second rotary drive device (56) is connected to the rotating mounting plate (51) for transmission. The movable bracket (53) is slidably mounted on the rotating mounting plate (51); The identification camera (52) is fixedly mounted on the movable bracket (53). The identification camera (52) is used to identify the hole position of the detection balance screw (111). The second linear actuator (54) is fixedly mounted on the rotating mounting plate (51), and the output end of the second linear actuator (54) is connected to the movable bracket (53); The adaptive connector (55) is rotatably mounted on the movable bracket (53); The third rotary drive device (57) is fixedly mounted on the movable bracket (53), and the output end of the third rotary drive device (57) is connected to the adaptive connector (55) for transmission.

8. A CNC milling cutter with rapid dynamic balance measurement function according to claim 7, characterized in that, The adaptive connector (55) includes a swivel mounting sleeve (551), a movable connector (552), and an adaptive spring; The rotating mounting sleeve (551) is rotatably mounted on the movable bracket (53), and a pressure sensor is provided inside the rotating mounting sleeve (551); The movable connector (552) is slidably mounted inside the rotating mounting sleeve (551); An adaptive spring is disposed between the rotating mounting sleeve (551) and the movable coupling (552).

9. A CNC milling cutter with rapid dynamic balance measurement function according to claim 1, characterized in that, The speed measuring device (6) includes a ball screw slide (61), a second lifting mounting plate (62), and a speed sensor (63). The ball screw slide (61) is mounted on the shaft positioning housing (3); The second lifting mounting plate (62) is fixedly installed on the movable end of the ball screw slide (61); The speed sensor (63) is fixedly mounted on the second lifting mounting plate (62).

10. A CNC milling cutter with rapid dynamic balance measurement function according to claim 1, characterized in that, The mobile platform (2) includes a positioning docking seat (21), a mobile trolley (22), and a mobile adjusting arm (23); The positioning docking seat (21) is fixedly installed on the CNC machine tool (1); A mobile trolley (22) is positioned beside the CNC machine tool (1); The movable adjustment arm (23) is mounted on the movable trolley (22).

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