Tightening mechanism and tightening method for ER cutter handle

Abstract

The invention provides a tightening mechanism and a tightening method for an ER knife handle. The tightening mechanism comprises a shell and a tightening mechanism, wherein the shell is provided with a containing cavity and an operation hole; the rotating wheel is arranged in the containing cavity, the rotating wheel is rotationally connected with the shell, the rotating wheel is provided with a through hole communicating with the operation hole, a tightening piece is arranged in the through hole and provided with a spline groove used for being matched with a clamping piece of the ER knife handle in an inserted mode, and a plurality of meshing teeth are distributed on the peripheral face of the rotating wheel; the stirring claw is arranged in the containing cavity, the stirring claw is movably connected with the shell, the stirring claw is provided with a first position abutting against the meshing teeth and a second position separated from the meshing teeth, and when the stirring claw is located at the second position, the driving assembly drives the rotating wheel to drive the tightening piece to rotate. According to the tightening mechanism, automatic operation is achieved through the driving assembly, and the technical problems that in the prior art, torque control is not accurate and repeatability is poor in a cutter handle tightening mode are solved.

Description

Technical Field

[0001] This invention relates to the technical field of ER tool holder assembly, and more specifically, to a tightening mechanism and tightening method for ER tool holders. Background Technology

[0002] In high-precision machining, the installation accuracy of the tool in the tool holder directly determines the quality of the machined workpiece. Traditionally, the tool holder is tightened by manual wrench, relying on the operator's experience and feel. This tightening method has problems such as inaccurate torque control and poor repeatability, which leads to large fluctuations in tool clamping force and low runout accuracy, making it difficult to meet the needs of higher precision machining.

[0003] There is currently no effective solution to the technical problems of inaccurate torque control and poor repeatability in the existing tool holder tightening methods. Summary of the Invention

[0004] The main objective of this invention is to provide a tightening mechanism and method for ER tool holders, so as to solve the technical problems of inaccurate torque control and poor repeatability in the existing tool holder tightening methods.

[0005] To achieve the above objectives, according to one aspect of the present invention, a tightening mechanism for an ER tool holder is provided, comprising: a housing having a receiving cavity and an operating hole, the operating hole communicating with the receiving cavity; a rotating wheel disposed within the receiving cavity and rotatably connected to the housing, the rotating wheel having a through hole communicating with the operating hole, a tightening member disposed within the through hole, the tightening member having a spline groove for engaging with a clamping member of the ER tool holder, and a plurality of meshing teeth distributed on the outer circumferential surface of the rotating wheel; and an actuating pawl disposed within the receiving cavity and movably connected to the housing, the actuating pawl having a first position abutting against the meshing teeth and a second position separating from the meshing teeth, wherein when the actuating pawl is in the first position, it drives the housing to rotate relative to the rotating wheel, thereby causing the actuating pawl to push the rotating wheel to rotate the tightening member; and when the actuating pawl is in the second position, a drive assembly drives the rotating wheel to rotate the tightening member.

[0006] Furthermore, the drive assembly is located inside the through hole of the rotating wheel. The fixed end of the drive assembly is connected to the housing, and the drive end of the drive assembly is connected to the rotating wheel. The drive assembly is used to drive the rotating wheel to rotate the tightening component.

[0007] Furthermore, the tightening mechanism also includes: a torque sensor connected to the drive assembly, which is used to detect the output torque of the drive assembly; and a main control module electrically connected to both the torque sensor and the drive assembly, which is used to receive torque information fed back by the torque sensor and to control the drive assembly based on the torque information.

[0008] Furthermore, the tightening mechanism also includes a human-machine interface module, which is located on the outer wall of the housing and is electrically connected to the main control module. The human-machine interface module is used to display torque information and drive information of the drive components.

[0009] Furthermore, the human-computer interaction module includes an audio-visual prompter, which is electrically connected to the main control module and is used to output audio and visual prompt information.

[0010] Furthermore, the tightening element is detachably connected to the rotating wheel.

[0011] Furthermore, a protrusion is provided on one of the outer peripheral surface of the tightening component and the inner peripheral surface of the rotating wheel, and a first groove is provided on one of the outer peripheral surface of the tightening component and the inner peripheral surface of the rotating wheel. The protrusion and the first groove are inserted and fitted along the axial direction of the through hole.

[0012] Furthermore, at least two operating handles are provided on the outer wall of the housing, and the at least two operating handles are arranged opposite each other in the radial direction of the operating hole.

[0013] Furthermore, the top of the actuating pawl is provided with a rotating shaft, part of which extends to the outside of the receiving cavity. The rotating shaft located outside the receiving cavity is connected to the adjusting rod, which drives the adjusting rod to adjust the position of the actuating pawl relative to the housing.

[0014] According to another aspect of the present invention, a tightening method for an ER tool holder is provided, wherein the tightening mechanism described above is used to tighten the ER tool holder. The tightening method includes the following steps: after adjusting the actuating pawl to a second position, the drive assembly drives the rotating wheel to rotate at a first rotational speed; after the clamping member of the ER tool holder engages with the ER tool holder nut to a preset length, the drive assembly drives the rotating wheel to rotate at a second rotational speed, the second rotational speed being greater than the first rotational speed; when the actual torque output by the drive assembly is close to the target torque, the drive assembly drives the rotating wheel to rotate at a third rotational speed until the actual torque equals the target torque, wherein the third rotational speed is less than the second rotational speed.

[0015] Applying the technical solution of this invention, the rotating wheel is rotatably connected to the housing. The outer circumferential surface of the rotating wheel is provided with meshing teeth. A tightening component is disposed within the through hole of the rotating wheel. The tightening component engages with the clamping component of the ER tool holder via a spline joint. The actuating pawl is movably connected to the housing. When the actuating pawl is in the first position, it abuts against the meshing teeth, and the housing is manually driven to rotate relative to the rotating wheel, causing the actuating pawl to push the rotating wheel and rotate the tightening component. When the actuating pawl is in the second position, it disengages from the meshing teeth, and the rotating wheel is driven by the drive assembly to rotate the tightening component. The above-mentioned tightening mechanism can be operated manually or automatically via the drive assembly. Automated operation not only ensures the consistency of each tightening process but also precisely controls the output torque of the drive assembly, achieving precise control of the rotation angle and speed of the tightening component. The drive assembly can also be combined with a torque sensor and intelligent control algorithm to achieve closed-loop torque control, ensuring the tool installation accuracy and meeting the requirements of high-end precision machining. This solves the technical problems of inaccurate torque control and poor repeatability in existing tool holder tightening methods. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 An exploded schematic diagram of the tightening mechanism in this application is shown;

[0018] Figure 2 A schematic diagram of the internal structure of the tightening mechanism in this application is shown;

[0019] Figure 3 A schematic diagram of the external structure of the tightening mechanism in this application is shown;

[0020] Figure 4 A flowchart of the tightening method in this application is shown.

[0021] The above figures include the following reference numerals:

[0022] 1. Shell;

[0023] 11. Upper shell; 12. Lower shell; 13. Operating hole; 14. Operating handle;

[0024] 2. Rotating wheel;

[0025] 21. Through hole; 22. Meshing teeth; 23. Protrusion;

[0026] 3. Tightening component; 31. Spline groove; 32. First groove;

[0027] 4. Move the claw;

[0028] 41. First claw arm; 42. Second claw arm; 43. Rotating shaft; 44. Adjusting rod;

[0029] 5. Bearings;

[0030] 51. Second groove;

[0031] 6. Knives;

[0032] 7. ER tool holder;

[0033] 8. Clamping components. Detailed Implementation

[0034] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0037] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0038] Combination Figures 1 to 3 As shown, according to a specific embodiment of this application, a tightening mechanism for an ER tool holder is provided.

[0039] Specifically, the tightening mechanism for the ER tool holder includes: a housing 1, a rotating wheel 2, an actuating pawl 4, and a drive assembly. The housing 1 has a receiving cavity and an operating hole 13, with the operating hole 13 communicating with the receiving cavity. The rotating wheel 2 is located inside the receiving cavity and is rotatably connected to the housing 1. The rotating wheel 2 has a through hole 21 communicating with the operating hole 13. A tightening member 3 is provided inside the through hole 21. The tightening member 3 has a spline groove 31 for engaging with the clamping member 8 of the ER tool holder 7. Multiple meshing teeth 22 are distributed on the outer circumferential surface of the rotating wheel 2. The actuating pawl 4 is disposed in the receiving cavity and is movably connected to the housing 1. The actuating pawl 4 has a first position that abuts against the meshing tooth 22 and a second position that is separated from the meshing tooth 22. When the actuating pawl 4 is in the first position, it drives the housing 1 to rotate relative to the rotating wheel 2, so that the actuating pawl 4 pushes the rotating wheel 2 to drive the tightening member 3 to rotate. When the actuating pawl 4 is in the second position, the drive assembly drives the rotating wheel 2 to drive the tightening member 3 to rotate.

[0040] In the embodiments of this application, the rotating wheel 2 is rotatably connected to the housing 1. The outer circumferential surface of the rotating wheel 2 is provided with meshing teeth 22. The tightening member 3 is disposed in the through hole 21 of the rotating wheel 2. The tightening member 3 is splinedly engaged with the clamping member 8 of the ER tool holder 7. The actuating pawl 4 is movably connected to the housing 1. When the actuating pawl 4 is in the first position, the actuating pawl 4 abuts against the meshing teeth 22, and the housing 1 is manually driven to rotate relative to the rotating wheel 2, so that the actuating pawl 4 pushes the rotating wheel 2 to drive the tightening member 3 to rotate. When the actuating pawl 4 is in the second position, the actuating pawl 4 separates from the meshing teeth 22, and the rotating wheel 2 is driven to drive the tightening member 3 to rotate through the de-drive assembly. The aforementioned tightening mechanism can be operated manually or automatically via a drive assembly. Automated operation not only ensures the consistency of each tightening process but also precisely controls the output torque of the drive assembly, enabling precise control of the rotation angle and speed of the tightening component 3. The drive assembly can also be combined with a torque sensor and intelligent control algorithm to achieve closed-loop control of the torque, ensuring the installation accuracy of the tool 6 and meeting the requirements of high-end precision machining. This solves the technical problems of inaccurate torque control and poor repeatability in existing tool holder tightening methods.

[0041] like Figure 1 , Figure 2 , Figure 3As shown, the housing 1 includes an upper shell 11 and a lower shell 12, which are detachably connected. The upper shell 11 and the lower shell 12 form a receiving cavity. Both the upper shell 11 and the lower shell 12 are provided with operating holes 13, which communicate with the receiving cavity. A rotating wheel 2 is disposed in the receiving cavity and is rotatably connected to the housing 1 via a bearing 5. The rotating wheel 2 is provided with a through hole 21, which is arranged through the axial direction of the rotating wheel 2 and communicates with the operating hole 13. The wall of the through hole 21 is provided with multiple protrusions 23, which are spaced apart circumferentially along the through hole 21 and extend axially along the through hole 21. The inner ring of the bearing 5 is fixedly connected to the upper shell 11, and the outer ring of the bearing 5 is provided with multiple second grooves 51, which are spaced apart circumferentially along the bearing 5. The second grooves 51 are inserted into the protrusions 23 to achieve the connection between the inner ring of the bearing 5 and the rotating wheel 2. A tightening member 3 is provided within the through hole 21 of the rotating wheel 2. The tightening member 3 has a spline groove 31 for engaging with the clamping member 8 of the ER tool holder 7. Multiple meshing teeth 22 are distributed on the outer circumferential surface of the rotating wheel 2. Two actuating claws 4 are provided within the receiving cavity, spaced apart circumferentially along the rotating wheel 2. The actuating claws 4 are movably connected to the housing 1. The position of the actuating claws 4 relative to the housing 1 is adjusted to have a first position where they abut against the meshing teeth 22 and a second position where they are separated from the meshing teeth 22. When the actuating claws 4 are in the first position, the housing 1 is manually driven to rotate relative to the rotating wheel 2, causing the actuating claws 4 to push the rotating wheel 2 and rotate the tightening member 3. When the actuating claws 4 are in the second position, the drive assembly drives the rotating wheel 2 and rotates the tightening member 3.

[0042] Furthermore, the drive assembly is located in the through hole 21 of the rotating wheel 2. The fixed end of the drive assembly is connected to the housing 1, and the drive end of the drive assembly is connected to the rotating wheel 2. The drive assembly is used to drive the rotating wheel 2 to rotate the tightening member 3.

[0043] In the embodiments of this application, the design of placing the drive component inside the through hole 21 of the rotating wheel 2 maximizes the use of the internal space of the mechanism, making the overall mechanism more compact and lightweight; the drive end of the drive component is directly connected to the rotating wheel 2, reducing the loss and delay in the power transmission process, ensuring that the energy of the drive component can be effectively and quickly converted into the rotational force of the tightening member 3, and improving the immediacy and accuracy of torque control.

[0044] For example, the drive component is a disc-type external rotor motor, which is embedded in the through hole 21 of the rotating wheel 2. The disc-type external rotor motor is located between the bearing 5 and the tightening member 3. The stator of the disc-type external rotor motor is fixedly connected to the housing 1, and the rotor of the disc-type external rotor motor is connected to the hole wall of the through hole 21. Specifically, the hole wall of the through hole 21 is provided with a plurality of protrusions 23, which are spaced apart circumferentially along the through hole 21 and extend axially along the through hole 21. The outer wall of the rotor of the disc-type external rotor motor is provided with a plurality of third grooves, which are spaced apart circumferentially along the rotor. The third grooves are inserted and engaged with the protrusions 23 to realize the connection between the rotor of the disc-type external rotor motor and the rotating wheel 2.

[0045] Furthermore, the tightening mechanism also includes a torque sensor and a main control module. The torque sensor is connected to the drive assembly and is used to detect the output torque of the drive assembly. The main control module is electrically connected to both the torque sensor and the drive assembly. The main control module is used to receive torque information fed back from the torque sensor and to control the drive assembly based on the torque information.

[0046] In the embodiments of this application, the torque sensor can monitor torque changes in real time and feed them back to the main control module. Based on the feedback torque information, the main control module can adjust the output of the drive component in real time to ensure that the torque is maintained within a preset range, avoiding over-tightening or under-tightening, and improving the accuracy and consistency of tool 6 installation. The synergistic effect of the torque sensor and the main control module ensures that the torque of each tightening operation is precisely controllable, which not only improves the stability of operation but also greatly enhances the repeatability of the tightening process.

[0047] For example, the drive component is a disc-type external rotor motor, and the torque sensor is connected to the rotor of the disc-type external rotor motor to detect the output torque of the rotor in real time. The main control module is integrated on the disc-type external rotor motor and is electrically connected to both the torque sensor and the drive component. The main control module is used to receive torque information fed back from the torque sensor and to adjust the output torque of the disc-type external rotor motor according to the torque information. The main control module can record the torque changes and final values ​​during each tightening process. This data is uploaded to the central management system via a wireless communication module (such as Bluetooth, Wi-Fi, etc.) to form a tightening process database, providing detailed data for subsequent process optimization, quality problem tracking, and product quality control.

[0048] Furthermore, the tightening mechanism also includes a human-machine interaction module, which is located on the outer wall of the housing 1. The human-machine interaction module is electrically connected to the main control module and is used to display torque information and drive information of the drive components.

[0049] In the embodiments of this application, the human-machine interaction module displays the torque data detected by the torque sensor and the operating status of the drive component in real time through the display screen. The operator can understand the torque changes and drive information during the tightening process in real time. This real-time feedback greatly improves the intuitiveness and controllability of the operation. The operator can make more precise operations based on the displayed information, avoiding misoperation caused by information opacity.

[0050] For example, the human-machine interface module is connected to the outer wall of the housing 1 and is electrically connected to the main control module. The human-machine interface module is equipped with a display screen, which displays torque information and drive information. The torque information includes the preset torque and the real-time torque received by the main control module. The human-machine interface module can also display historical operation records, including but not limited to torque curves and operation times, which helps the operator summarize lessons learned during the tightening process, optimize process parameters, and improve the accuracy and consistency of the tool 6 installation, thereby effectively controlling product quality and production efficiency.

[0051] Furthermore, the human-computer interaction module includes an audio-visual prompter, which is electrically connected to the main control module and is used to output audio and visual prompt information.

[0052] In the embodiments of this application, the audio-visual prompter is electrically connected to the main control module and can provide the operator with real-time feedback information through sound and light signals, such as tightening completion, abnormal torque, operation error, etc., so that the operator does not have to keep staring at the display screen at all times and can understand the working status and operation results of the tightening mechanism in real time.

[0053] Furthermore, the tightening component 3 is detachably connected to the rotating wheel 2.

[0054] In the embodiments of this application, the tightening member 3 is detachably connected to the rotating wheel 2, so that the tightening mechanism can be adapted to different models of ER tool holders 7, enhancing the flexibility and versatility of the tightening mechanism. The tightening member 3 has a clamping member 8 for interlocking with the ER tool holder 7. The tightening member 3 is at risk of wear or damage during use. The detachable design facilitates the replacement and maintenance of the tightening member 3, greatly reducing maintenance costs and downtime.

[0055] For example, the tightening member 3 and the rotating wheel 2 can be plugged in or screwed together.

[0056] In one exemplary embodiment of this application, a protrusion 23 is provided on one of the outer peripheral surface of the tightening member 3 and the inner peripheral surface of the rotating wheel 2, and a first groove 32 is provided on one of the outer peripheral surface of the tightening member 3 and the inner peripheral surface of the rotating wheel 2. The protrusion 23 and the first groove 32 are inserted and fitted along the axial direction of the through hole 21.

[0057] In the embodiments of this application, the protrusion 23 and the first groove 32 are inserted and engaged along the axial direction of the through hole 21, that is, the tightening member 3 is inserted and engaged with the rotating wheel 2 along the axial direction of the through hole 21, which can realize the quick replacement and precise alignment of the tightening member 3, which is simple to operate and has low operation difficulty.

[0058] like Figure 1 As shown, the through hole 21 of the rotating wheel 2 has multiple protrusions 23 on its wall. The multiple protrusions 23 are spaced apart circumferentially along the through hole 21 and extend axially along the through hole 21. The outer circumferential surface of the tightening member 3 has multiple first grooves 32, which are spaced apart circumferentially along the tightening member 3. The first grooves 32 and the protrusions 23 are inserted and engaged along the axial direction of the through hole 21 to achieve the insertion and engagement of the tightening member 3 and the rotating wheel 2.

[0059] Specifically, the wall of the through hole 21 is provided with multiple protrusions 23, which are spaced apart circumferentially along the through hole 21 and extend axially along the through hole 21. The outer wall of the rotor of the disc-type external rotor motor is provided with multiple third grooves, which are spaced apart circumferentially along the rotor. The third grooves are inserted and engaged with the protrusions 23 to realize the connection between the rotor of the disc-type external rotor motor and the rotating wheel 2.

[0060] Furthermore, at least two operating handles 14 are provided on the outer wall of the housing 1, and the at least two operating handles 14 are arranged opposite each other along the radial direction of the operating hole 13.

[0061] In the embodiments of this application, at least two operating handles 14 are arranged opposite each other along the radial direction of the operating hole 13. When the operator uses the tightening mechanism, he / she can apply a balanced force, avoiding the radial imbalance force that may be caused by single-handed operation, thereby improving the stability of the equipment during operation and helping to achieve more precise torque control.

[0062] like Figure 1 As shown, two operating handles 14 are provided on the side wall of the upper shell 11, and the two operating handles 14 are arranged opposite each other along the radial direction of the operating hole 13.

[0063] Furthermore, the top of the actuating claw 4 is provided with a rotating shaft 43, part of which extends to the outside of the receiving cavity. The rotating shaft 43 located outside the receiving cavity is connected to the adjusting rod 44, driving the adjusting rod 44 to adjust the position of the actuating claw 4 relative to the housing 1.

[0064] In the embodiments of this application, the adjusting rod 44 is connected to the rotating shaft 43 at the top of the actuating claw 4. The adjusting rod 44 is located outside the receiving cavity. The position of the actuating claw 4 is adjusted by adjusting the adjusting rod 44, which is simple to operate.

[0065] like Figure 1 , Figure 2As shown, the bottom of the actuating claw 4 is provided with a connecting shaft, and the actuating claw 4 is rotatably connected to the lower shell 12 through the connecting shaft. The top of the actuating claw 4 is provided with a rotating shaft 43, and the actuating claw 4 is connected to the upper shell 11 with damping through the rotating shaft 43. Part of the rotating shaft 43 extends out of the receiving cavity. The rotating shaft 43 located outside the receiving cavity is connected to the adjusting rod 44. That is, the adjusting rod 44 is located outside the receiving cavity and close to the upper shell 11. By turning the adjusting rod 44, the actuating claw 4 is driven to rotate relative to the shell 1. The actuating claw 4 has a first claw arm 41 and a second claw arm 42. The first claw arm 41 abuts against the meshing teeth 22 on the rotating wheel 2 to push the rotating wheel 2 to rotate clockwise. The second claw arm 42 abuts against the meshing teeth 22 on the rotating wheel 2 to push the rotating wheel 2 to rotate counterclockwise.

[0066] According to another specific embodiment of this application, a tightening method for an ER tool holder 7 is provided, wherein the tightening mechanism described in the above embodiment is used to tighten the ER tool holder 7, such as... Figure 4 As shown, the tightening method includes the following steps:

[0067] Step S1: After adjusting the toggle 4 to the second position, the drive assembly drives the rotating wheel 2 to rotate at the first speed.

[0068] Specifically, the actuating pawl 4 is adjusted to the second position to separate it from the rotating wheel 2, thereby allowing the drive assembly to drive the rotating wheel 2 to rotate. The operator holds the operating handle 14 with both hands, aligning the clamping member 8 with the tool 6 with the ER tool holder 7, and starts the tightening mechanism, causing the drive assembly to drive the rotating wheel 2 to rotate at the first speed. In the initial tightening stage, the rotating wheel 2 is driven at a low speed to ensure that the clamping member 8 of the ER tool holder 7 contacts the nut of the ER tool holder 7 slowly and smoothly, avoiding inaccurate positioning and damage to parts caused by high-speed impact.

[0069] Step S2: When the clamping member 8 of the ER tool holder 7 engages with the nut of the ER tool holder 7 to a preset length, the drive assembly drives the rotating wheel 2 to rotate at a second speed, which is greater than the first speed.

[0070] Specifically, when the clamping member 8 and the nut of the ER tool holder 7 initially engage and reach the preset length, the drive assembly drives the rotating wheel 2 at high speed to quickly increase the torque, shorten the tightening time, and improve production efficiency; at the same time, it ensures that there is sufficient torque for effective clamping after reaching the preset length.

[0071] Step S3: When the actual torque output by the drive component is close to the target torque, the drive component drives the rotating wheel 2 to rotate at a third speed until the actual torque equals the target torque, wherein the third speed is less than the second speed.

[0072] Specifically, when the actual torque approaches the target torque, the drive assembly decelerates again to perform the final fine tightening at a lower speed, avoiding the risk of over-torque and ensuring that the tightening process can end smoothly when the optimal predetermined clamping force is reached, thereby maintaining the optimal rigidity and precision between the ER tool holder 7 and the tool 6.

[0073] In the embodiments of this application, low-speed tightening is performed in the initial stage to avoid unnecessary impact, high-speed tightening is performed in the middle stage to quickly complete most of the tightening task, and the speed is reduced again in the final stage to more precisely control the torque and reduce excessive load on the system. This segmented speed control tightening method, by intelligently adjusting the different speeds of the rotating wheel 2, achieves efficient and precise tightening of the ER tool holder 7. This tightening method not only improves production efficiency but also ensures precise control of the tightening process, avoids energy loss and component wear, and enhances operational safety and equipment durability.

[0074] In one exemplary embodiment of this application, the specific steps for tightening the ER tool holder 7 using a tightening mechanism are as follows:

[0075] 1. Data Preparation Stage: The operator first measures the tool 6 to be installed on a dedicated tool 6 measuring instrument to obtain its precise geometric parameters such as length and diameter. The measurement data can be automatically transmitted via Bluetooth, or the operator can input it into the tightening mechanism's database by scanning the tool 6's QR code.

[0076] 2. Parameter Setting Stage: After receiving the measurement data of tool 6, the main control unit calls the internally stored "tool 6 parameter - tightening torque" mapping database, or dynamically calculates the optimal tightening torque value T_set most suitable for tool 6 through a built-in intelligent algorithm (such as a regression model based on the diameter and overhang length of tool 6). This torque value aims to achieve the best clamping stiffness and accuracy, while avoiding excessive torque damage to the tool holder or tool 6. The target torque value is automatically set and displayed on the display screen of the human-machine interface module.

[0077] 3. Tightening execution stage: After adjusting the actuating claw 4 to the second position, the operator holds the operating handle 14 with both hands, aligns the clamping member 8 with the cutting tool 6 with the ER tool holder 7, and inserts the front end of the ER tool holder 7 into the preset V-groove.

[0078] After pressing the start button, the device automatically executes the tightening procedure: First, the disc-type external rotor motor starts at a low speed to ensure smooth engagement of the clamping member 8 of the ER tool holder 7 with the nut of the ER tool holder 7; after the clamping member 8 of the ER tool holder 7 engages with the nut of the ER tool holder 7 for a certain length, the disc-type external rotor motor smoothly accelerates to the preset tightening speed; when the real-time torque approaches the target torque T_set (for example, reaching 90% of T_set), the disc-type external rotor motor is controlled to decelerate, entering the fine tightening stage. The main control unit continuously compares the real-time torque with T_set, and once the target value is reached, it immediately cuts off the motor power, causing the disc-type external rotor motor to stop precisely, while the audible and visual indicator issues a completion signal (such as a green light illuminating and a short buzzer sounding).

[0079] 4. Data Recording and Traceability: Throughout the tightening process, the main control unit uploads all data of the operation (including final torque, torque-time curve, operation timestamp, corresponding tool 6ID, etc.) in real time to the computer's Manufacturing Execution System (MES) or a dedicated quality management database via Bluetooth module. This data provides complete data chain support for subsequent process optimization, quality analysis, and problem traceability.

[0080] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0081] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0082] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0083] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A tightening mechanism for an ER tool shank, characterized by, The application relates to a tightening mechanism for an ER knife handle, which comprises the following parts: a shell (1) provided with a containing cavity and an operation hole (13) in communication with the containing cavity; a rotating wheel (2) arranged in the containing cavity and rotationally connected with the shell (1), the rotating wheel (2) is provided with a through hole (21) in communication with the operation hole (13), a tightening member (3) is arranged in the through hole (21), the tightening member (3) is provided with a spline groove (31) for inserting and matching with a clamping member (8) of an ER knife handle (7), and a plurality of meshing teeth (22) are distributed on the outer circumferential surface of the rotating wheel (2); a pushing claw (4) arranged in the containing cavity and movably connected with the shell (1), the pushing claw (4) has a first position for abutting against the meshing teeth (22) and a second position for separating from the meshing teeth (22), when the pushing claw (4) is located at the first position, the shell (1) is driven to rotate relative to the rotating wheel (2), so that the pushing claw (4) pushes the rotating wheel (2) to drive the tightening member (3) to rotate, when the pushing claw (4) is located at the second position, a driving assembly drives the rotating wheel (2) to drive the tightening member (3) to rotate.

2. A tightening mechanism for an ER knife handle according to claim 1, wherein, The driving assembly is arranged in the through hole (21) of the rotating wheel (2), a fixed end of the driving assembly is connected with the shell (1), and a driving end of the driving assembly is connected with the rotating wheel (2), the driving assembly is used for driving the rotating wheel (2) to drive the tightening member (3) to rotate.

3. A tightening mechanism for an ER knife handle according to claim 2, wherein, The tightening mechanism further comprises: a torque sensor connected with the driving assembly, the torque sensor is used for detecting the output torque of the driving assembly; a main control module electrically connected with the torque sensor and the driving assembly, the main control module is used for receiving torque information fed back by the torque sensor and controlling the driving assembly according to the torque information.

4. The tightening mechanism for an ER knife handle of claim 3, wherein, The tightening mechanism further comprises: a man-machine interaction module arranged on the outer wall of the shell (1) and electrically connected with the main control module, the man-machine interaction module is used for displaying torque information and driving information of the driving assembly.

5. The tightening mechanism for an ER knife handle of claim 4, wherein, The man-machine interaction module comprises an audible and visual indicator electrically connected with the main control module, the audible and visual indicator is used for outputting sound prompt information and light prompt information.

6. A tightening mechanism for an ER knife handle according to any one of claims 1-5, characterized in that, The tightening member (3) is detachably connected with the rotating wheel (2).

7. The tightening mechanism for an ER knife handle of claim 6, wherein, One of the outer circumferential surface of the tightening member (3) and the inner circumferential surface of the rotating wheel (2) is provided with a protrusion (23), and the other is provided with a first groove, the protrusion (23) and the first groove are inserted and matched along the axis direction of the through hole (21).

8. A tightening mechanism for an ER knife handle according to any one of claims 1-5, characterized in that, At least two operation handles (14) are arranged on the outer wall of the shell (1) and are oppositely arranged along the radial direction of the operation hole (13).

9. A tightening mechanism for an ER knife handle according to any one of claims 1-5, wherein, The top of the toggle claw (4) is provided with a rotating shaft (43), part of the rotating shaft (43) extends to the outside of the accommodating cavity, the rotating shaft (43) outside the accommodating cavity is connected with an adjusting rod (44), the adjusting rod (44) is driven to adjust the position of the toggle claw (4) relative to the shell (1).

10. A tightening method for an ER tool shank, characterized by, The tightening method comprises the following steps: After adjusting the toggle claw (4) to the second position, the driving assembly drives the rotating wheel (2) to rotate at a first rotating speed; When the clamping part (8) of the ER tool shank (7) is engaged with the nut of the ER tool shank (7) to a preset length, the driving assembly drives the rotating wheel (2) to rotate at a second rotating speed, and the second rotating speed is greater than the first rotating speed; When the actual torque output by the driving assembly approaches the target torque, the driving assembly drives the rotating wheel (2) to rotate at a third rotating speed until the actual torque is equal to the target torque, wherein the third rotating speed is less than the second rotating speed.

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