High-precision thread milling equipment and its application in furniture connector production

Abstract

This invention relates to the field of thread milling technology, specifically to a high-precision thread milling device and its application in the production of furniture connectors. The device includes: a frame structure and two symmetrically arranged milling heads connected by a drive assembly; a pneumatic gripper mounted on the frame structure; multiple sets of clamping assemblies mounted on the frame structure, arranged vertically in space, and cooperating with the pneumatic gripper to fix the workpiece; a coaxial wheel assembly that is rolledly connected to clearance grooves on the clamping assemblies; and a follower connected to the drive assembly, cooperating with the coaxial wheel assembly to sequentially open and close the clamping assemblies as the milling head moves along the length of the workpiece. This prevents uneven stress or bending / torsion on the workpiece during milling, improving milling accuracy.

Description

Technical Field

[0001] This invention relates to the field of thread milling technology, specifically to a high-precision thread milling device and its application in the production of furniture connectors. Background Technology

[0002] In furniture, connectors are key components used for furniture assembly and connecting hardware accessories. They make the furniture structure sturdy and easy to disassemble and install. They mainly include structures such as screws, washers, and nuts. For the connection of two large components, a longer screw is required to ensure connection stability.

[0003] In the screw machining process, thread milling devices are indispensable for achieving high-precision thread processing. However, existing thread milling devices typically use a single milling cutter for milling operations. While this method offers a relatively simple overall structure and ease of operation, the workpiece is generally fixed in a way that involves a bottom clamping fixture and a top cone. This means that when the screw to be machined is long, the middle section of the screw, lacking support, tends to bend under the unilateral pressure from the single milling cutter, resulting in lower thread machining accuracy at the bent location. Furthermore, because the single milling cutter acts circumferentially on the workpiece, the unilateral force can cause the screw to reciprocate and twist around its bottom clamping fixture and top cone position, making the workpiece prone to breakage and reducing the yield rate. Summary of the Invention

[0004] The purpose of this invention is to provide a high-precision thread milling device and its application in the production of furniture connectors, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] High-precision thread milling equipment, including:

[0007] The frame structure and two sets of symmetrically arranged milling heads are connected by a drive assembly.

[0008] Pneumatic grippers are mounted on the frame structure;

[0009] Multiple sets of clamping components are installed on the frame structure. The multiple sets of clamping components are arranged vertically in space, and the clamping components cooperate with the pneumatic grippers to fix the workpiece.

[0010] A coaxial wheel assembly is tactilely connected to a relief groove provided on the engagement assembly;

[0011] The follower is connected to the drive assembly. The follower cooperates with the coaxial wheel set and can cause multiple sets of the clamping components to open and close sequentially when the milling head moves along the length direction of the workpiece.

[0012] As a further aspect of the present invention: the drive assembly includes a cross slide adjustment structure disposed on the frame structure, and a motor is fixedly mounted on the cross slide adjustment structure;

[0013] The drive assembly also includes a connecting plate that connects to the cross slide adjustment structure. The connecting plate is provided with a rotation kit, which is connected to the milling head and is connected to the output shaft of the motor via a toothed belt.

[0014] As a further embodiment of the present invention: the self-rotating kit includes a rotating ring that rotatably engages with the connecting plate, the rotating ring being connected to the toothed belt, and the rotating ring being rotatably connected to the milling head;

[0015] The self-rotating assembly also includes a gear fixedly connected coaxially to the milling head, the gear meshing with an internal gear ring disposed on the connecting plate.

[0016] As a further embodiment of the present invention: the clamping component includes a vertical shaft fixedly installed on the frame structure, a side plate connected to the vertical shaft, a sliding connection part fixedly installed on the side plate, a telescopic shaft slidably installed in the sliding connection part, and an arc-shaped clamping member detachably installed at one end of the telescopic shaft;

[0017] The clamping assembly also includes a cylindrical spring at one end that is rotatably connected to the side plate.

[0018] As a further embodiment of the present invention: a connector is installed at the other end of the telescopic shaft, and a groove is provided on the connector, so that the slider provided on the coaxial wheel assembly can slide in the groove;

[0019] When the coaxial wheel assembly moves along the relief groove, the slider can slide relative to the groove.

[0020] As a further embodiment of the present invention: the coaxial wheel assembly includes a driven member fixedly connected to the slider, and a first convex shaft and a second convex shaft are rotatably mounted on both sides of the driven member, the second convex shaft being rotatably connected to the cylindrical spring;

[0021] The second convex shaft is capable of rolling within the relief groove.

[0022] As a further embodiment of the present invention: the clearance groove includes a vertical groove disposed on the side plate, and the two ends of the vertical groove are connected to inclined grooves that are away from the arc-shaped clamping member;

[0023] When the coaxial wheel assembly is in the vertical groove, the arc-shaped clamping member is locked in position. When the coaxial wheel assembly moves along the inclined groove, the arc-shaped clamping member can move away from the workpiece.

[0024] As a further embodiment of the present invention: the follower is provided with a vertical surface on the side away from the milling head, and each end of the vertical surface is provided with a set of inclined surfaces. The inclined surfaces are in rolling cooperation with the first cam shaft, which can drive the second cam shaft to move along the relief groove.

[0025] The application of the high-precision thread milling device described above in the production of furniture connectors.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] By using symmetrically arranged milling heads, when two sets of milling heads act on the workpiece simultaneously, the forces on both sides of the workpiece can be balanced. This avoids the workpiece bending problem caused by unilateral force on the workpiece when milling with only a single set of milling heads in traditional methods. In actual processing, workpiece bending directly affects the depth of thread milling, thus negatively impacting the thread milling accuracy. This invention effectively overcomes this problem by using symmetrically arranged milling heads, thereby fundamentally ensuring the accuracy of thread processing on the workpiece, providing a reliable guarantee for high-quality thread processing, and improving the overall quality of the product.

[0028] By using the designed clamping components and follower components, the system can first perform segmented clamping and release of long workpieces, ensuring effective support for them while providing space for the milling head to ensure proper thread milling. Secondly, the system enables the arc-shaped clamping components to maintain rigid support for the workpiece, increasing the support force. Furthermore, the system allows adjacent sets of clamping components to clamp alternately, achieving seamless connection of clamping force for long workpieces and avoiding insufficient lateral support force for long workpieces caused by simultaneous release of the workpiece by two sets of clamping components. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of one embodiment of a high-precision thread milling device.

[0030] Figure 2 This is a schematic diagram of the drive component in one embodiment of a high-precision thread milling device.

[0031] Figure 3 This is an exploded view of a partial structure of the drive component in one embodiment of a high-precision thread milling device.

[0032] Figure 4 This is a top view of the rotating ring and milling head in one embodiment of a high-precision thread milling device.

[0033] Figure 5 This is a schematic diagram of the structure of the clamping component and the coaxial wheel assembly in one embodiment of a high-precision thread milling device.

[0034] Figure 6 This is a schematic diagram of the structure of the clamping component and the coaxial wheel assembly from another angle in one embodiment of a high-precision thread milling device.

[0035] Figure 7 This is a schematic diagram of the clamping component in one embodiment of a high-precision thread milling device.

[0036] Figure 8 This is a schematic diagram of the coaxial wheel assembly in one embodiment of a high-precision thread milling device.

[0037] Figure 9 This is a schematic diagram of the structure of a coaxial wheel assembly, telescopic shaft, arc-shaped clamping component, and connecting component in one embodiment of a high-precision thread milling device.

[0038] Figure 10 This is a schematic diagram of the side plate structure in one embodiment of a high-precision thread milling device.

[0039] Figure 11 This is a structural schematic diagram of the motion state of the follower in one embodiment of a high-precision thread milling device.

[0040] In the diagram: 1. Frame structure; 2. Cross slide adjustment structure; 3. Motor; 4. Toothed belt; 5. Rotary ring; 6. Milling head; 7. Gear; 8. Connecting plate; 9. Internal toothed ring; 10. Follower; 1001. Inclined surface; 1002. Vertical surface; 11. Pneumatic gripper; 12. Vertical shaft; 13. Side plate; 1301. Inclined groove; 1302. Vertical groove; 14. Sliding connection; 15. Telescopic shaft; 16. Arc-shaped clamping component; 17. Connecting component; 1701. Slide groove; 18. Follower; 1801. Slider; 19. First convex shaft; 20. Second convex shaft; 21. Cylindrical spring. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0043] Please see Figures 1 to 11 In this embodiment of the invention, the high-precision thread milling device includes:

[0044] The frame structure 1 includes two sets of symmetrically arranged milling heads 6, pneumatic grippers 11, multiple sets of clamping components, coaxial wheel sets, and follower components 10.

[0045] The frame structure 1 and the milling head 6 are connected by a drive assembly. The drive assembly includes a cross slide adjustment structure 2 set on the frame structure 1. A motor 3 is fixedly installed on the cross slide adjustment structure 2. The cross slide adjustment structure 2 enables the motor 3 to have two motion states in the vertical direction, namely a horizontal motion state and a vertical motion state, so that it can switch position and posture in the horizontal and vertical directions, providing a flexible positioning space solution for subsequent precision machining processes.

[0046] In the specific operation process, considering the stringent requirements for initial positioning accuracy in milling operations, the horizontal movement of motor 3 is lockable. This allows the operator to adjust the position of motor 3 and milling head 6 according to predetermined process parameters before workpiece clamping. Once the workpiece is precisely positioned, the horizontal displacement freedom of motor 3 can be physically restricted by activating the locking structure (not shown in the figure), thereby ensuring the spatial positional stability of milling head 6 during the cutting process. It is worth noting that the implementation scheme of this locking structure has high engineering flexibility. Common implementation methods include, but are not limited to: utilizing the self-locking characteristics of threads (such as the precise fit between threaded sleeves and lead screws), mechanical pin and locking groove structures based on the interlocking principle, and modern drive technologies such as electromagnetic braking. These diverse locking methods can be adapted to the vibration level, load changes, and response speed requirements of the actual production environment.

[0047] Furthermore, when the motor 3 starts and drives the milling head 6 into the working state, the two can move downwards at a constant speed, so that the milling head 6 can move along the length of the workpiece at a constant speed, ensuring the normal progress of thread milling.

[0048] The drive assembly also includes a connecting plate 8 that connects to the cross slide adjustment structure 2. The connecting plate 8 is provided with a self-rotating kit, which is connected to the milling head 6. The self-rotating kit is connected to the output shaft of the motor 3 through a toothed belt 4. The self-rotating kit includes a rotating ring 5 that rotates and engages with the connecting plate 8. The rotating ring 5 is connected to the toothed belt 4 and is rotatably connected to the milling head 6.

[0049] The self-rotating kit also includes a gear 7 that is coaxially fixedly connected to the milling head 6, and the gear 7 meshes with an internal gear ring 9 disposed on the connecting plate 8.

[0050] In this embodiment, two sets of milling heads 6 are symmetrically arranged on the rotating ring 5, and the middle of the rotating ring 5 adopts a hollow design. This design cleverly provides a passage for the workpiece to pass through, facilitating subsequent machining operations. Specifically, during the milling operation, the motor 3 moves precisely in the vertical direction, driving the connecting plate 8, the rotating ring 5, and the milling heads 6 to move downwards synchronously. At the same time, the workpiece and the rotating ring 5 are coaxial, and this coaxial design plays a crucial role in ensuring machining accuracy. In this state, the output shaft of the motor 3 begins to rotate, and with the help of the toothed belt 4 as a transmission component, it drives the rotating ring 5 to rotate stably. Furthermore, the gear 7 connected to the milling head 6 will make a circular motion under the drive of the rotating ring 5. The gear 7 and the internal gear ring 9 are in a precise meshing state. When the gear 7 makes a circular motion, it also rotates itself. This motion mode allows the milling head 6 to both make a circular motion and rotate itself. Thus, with the efficient cooperation of the two sets of milling heads 6, thread milling of the workpiece can be realized, which greatly accelerates the milling speed and significantly improves the processing efficiency.

[0051] It is important to emphasize that the symmetrical arrangement of the two sets of milling heads 6 in this application has significant meaning and advantages. When the two sets of milling heads 6 act on the workpiece simultaneously, they can balance the forces on both sides of the workpiece. This balanced force design cleverly avoids the workpiece bending problem caused by unilateral force on the workpiece when milling a workpiece using only a single set of milling heads 6 in the traditional method. In actual processing, workpiece bending will directly affect the depth of thread milling, thus negatively impacting the thread milling accuracy. This design effectively overcomes this problem by using symmetrically arranged milling heads 6, thereby fundamentally ensuring the accuracy of thread processing on the workpiece, providing a reliable guarantee for high-quality thread processing, and improving the overall quality of the product.

[0052] Furthermore, the milling device is designed with excellent stability and reliability. Through the symmetrical arrangement of the milling heads 6 and a rational transmission design, the force on each component is uniform during machining, reducing wear caused by excessive localized stress and extending the equipment's service life. Simultaneously, this symmetrical layout also improves the equipment's rigidity, enabling it to maintain a stable working state during high-speed milling, further ensuring consistency in machining accuracy and efficiency.

[0053] In summary, the milling device in this application, through two symmetrically arranged milling heads 6, combined with the hollow design of the rotating ring 5 and the precise transmission between the components, not only improves the speed and efficiency of thread milling, but also effectively ensures the machining accuracy. It solves the workpiece bending problem existing in the traditional single-set milling head 6 machining, and provides a high-efficiency, precise and reliable thread milling solution for the machining field, with significant technical advantages and broad application prospects.

[0054] Please see Figures 5-8 The pneumatic gripper 11 is mounted on the frame structure 1;

[0055] Multiple sets of the clamping components are arranged on the frame structure 1, and the multiple sets of clamping components are arranged in the vertical direction of space. The clamping components cooperate with the pneumatic gripper 11 to fix the workpiece.

[0056] The clamping assembly includes a vertical shaft 12 fixedly installed on the frame structure 1, a side plate 13 connected to the vertical shaft 12, a sliding connection part 14 fixedly installed on the side plate 13, a telescopic shaft 15 slidably installed in the sliding connection part 14, and an arc-shaped clamping member 16 detachably installed at one end of the telescopic shaft 15.

[0057] The clamping assembly also includes a cylindrical spring 21 with one end rotatably connected to the side plate 13.

[0058] In this embodiment, multiple sets of clamping components cooperate with the pneumatic gripper 11 to reliably fix the workpiece and ensure that the workpiece always remains vertical. This design solves the coaxiality problem between the workpiece and the rotating ring 5 during the downward movement of the rotating ring 5, thereby significantly improving the accuracy of thread milling. The following is a detailed description of the role and advantages of this clamping component and its related parts in the milling process:

[0059] In the initial state, the cylindrical spring 21 generates a continuous and stable traction force on the telescopic shaft 15. Under the action of this force, the arc-shaped clamping members 16 located on both sides of the workpiece can move precisely toward the workpiece and fit tightly against the workpiece surface. By using two sets of arc-shaped clamping members 16 to firmly hold the workpiece, it can effectively prevent the workpiece from shifting or shaking during processing. When the milling head 6 begins to apply force to the workpiece, since the workpiece has been firmly held by the arc-shaped clamping members 16, this structure can significantly suppress the tendency of the workpiece to bend due to uneven force. This effect of suppressing bending is particularly important when processing long workpieces, and can effectively avoid thread processing errors caused by workpiece deformation, thereby ensuring that the processed threads meet the design requirements in terms of dimensional accuracy and surface quality.

[0060] Furthermore, the ingenious arrangement of the clamping components in the vertical direction of space allows multiple sets of clamping components to act evenly on the workpiece at equal intervals. This equidistant action not only ensures that the workpiece is subjected to uniform force at each clamping point, but also helps to improve the overall stability of the workpiece. With the cooperation of the follower 10 and the coaxial wheel set, the entire system can achieve intelligent dynamic adjustment. When the milling head 6 is about to act on the predetermined position of the workpiece, the two sets of arc-shaped clamping components 16 at the corresponding positions can move away from the workpiece, thereby making enough space for the milling operation of the milling head 6. This avoids interference with the normal operation of the milling head 6 due to the clamping force of the arc-shaped clamping components 16, ensuring the smooth progress of the milling process.

[0061] Crucially, although some of the arc-shaped clamping parts 16 may temporarily move away from the workpiece during milling, the remaining clamping components can still maintain a firm grip on the workpiece. This segmented release clamping method allows the workpiece to be effectively supported and fixed as a whole while being milled locally. When the milling head 6 acts on the workpiece and causes it to bend, the force can be concentrated in a specific area of ​​the workpiece, and the clamping components in other areas continue to function, significantly reducing the degree of bending of the workpiece. This combination of local release and overall fixation not only improves machining accuracy but also effectively reduces residual stress on the workpiece during machining, thereby improving the final machining quality and service life of the workpiece.

[0062] In summary, the structural design and precise action of the clamping component and pneumatic gripper 11 in this embodiment enable reliable fixation and dynamic adjustment of the workpiece, effectively suppressing bending deformation of the workpiece during processing and improving the accuracy and quality of thread milling.

[0063] In practical applications, the advantages of this clamping assembly and pneumatic gripper 11 will become even more apparent. For example, when machining high-precision threaded parts, such as key components in the aerospace field and transmission threads in precision machinery, there are extremely stringent requirements for the dimensional accuracy, surface roughness, and overall quality of the threads. Traditional workpiece clamping methods often cannot meet the needs of these high-precision machining processes. However, the clamping assembly in this design, through its unique combination of segmented release and overall fixation, can ensure that the workpiece remains stable throughout the machining process, thereby producing threaded products that meet high-quality standards.

[0064] Meanwhile, this design can also effectively extend the service life of the equipment. Because the clamping components can reasonably distribute the force on the workpiece during processing, the additional load on the equipment caused by workpiece deformation is reduced, thereby reducing the risk of wear and damage to key components of the equipment. This is of great significance for improving the reliability of the equipment and reducing maintenance costs.

[0065] Please see Figures 7-10 The other end of the telescopic shaft 15 is equipped with a connector 17, and the connector 17 is provided with a slide groove 1701. The slider 1801 provided on the coaxial wheel assembly can slide in the slide groove 1701.

[0066] When the coaxial wheel assembly moves along the relief groove, the slider 1801 can slide relative to the slide groove 1701;

[0067] The coaxial wheel assembly includes a follower 18 fixedly connected to the slider 1801. A first convex shaft 19 and a second convex shaft 20 are rotatably mounted on both sides of the follower 18. The second convex shaft 20 is rotatably connected to the other end of the cylindrical spring 21.

[0068] The second convex shaft 20 is capable of rolling within the relief groove;

[0069] The coaxial wheel assembly is tactilely connected to the clearance groove provided on the clamping assembly. The clearance groove includes a vertical groove 1302 provided on the side plate 13. The two ends of the vertical groove 1302 are connected to inclined grooves 1301 that are away from the arc-shaped clamping member 16.

[0070] When the second convex shaft 20 is in the vertical groove 1302, the arc-shaped clamping member 16 is locked in position. When the second convex shaft 20 moves along the inclined groove 1301, the arc-shaped clamping member 16 can move away from the workpiece.

[0071] In the machining system constructed in this embodiment, in the initial state, the cylindrical spring 21 plays a key role with its initial elastic potential energy. Through stable and continuous traction, it ensures that the second convex shaft 20 is accurately positioned in the predetermined position of the vertical groove 1302. This pre-positioning design lays a solid foundation for the subsequent machining process. When the workpiece tends to bend due to external forces, the workpiece will transmit the reaction force to the telescopic shaft 15 through the tight contact surface with the arc-shaped clamping member 16, and then transmit it to the driven member 18 through the connecting member 17. At this time, since the second convex shaft 20 is within the constraint range of the vertical groove 1302, when the reaction force drives it to move, the second convex shaft 20 will abut tightly against the side wall of the vertical groove 1302, forming a stable mechanical support, thereby effectively counteracting the bending reaction force of the workpiece.

[0072] This design ensures that the telescopic shaft 15 and the arc-shaped clamping member 16 are in a locked and stable state in the initial state, achieving rigid contact between the arc-shaped clamping member 16 and the workpiece. The advantage of this rigid contact is that it not only enhances the clamping effect on the workpiece, but also avoids the problem that the clamping force generated by the column spring 21 may be too small. In actual machining scenarios, if only the spring force is relied on for clamping, when the workpiece is subjected to large cutting forces or vibrations, the column spring 21 may deform, resulting in insufficient clamping force, which in turn affects the stability of the workpiece.

[0073] It is particularly important to note that the selection of the cylindrical spring 21 is crucial. In this application, a spring with high stiffness should be selected to ensure sufficient initial elastic force and stability. Simultaneously, the follower 18, the first cam 19, and the second cam 20 should preferably be made of low-density materials, such as aluminum alloy. Based on the selection of these materials, in the initial state, the second cam 20 needs to be stably positioned within the vertical groove 1302 by the pulling force of the cylindrical spring 21. If the materials of the follower 18, the first cam 19, and the second cam 20 have a high density, the vertical tension generated by their own weight may exceed the pulling force of the column spring 21, causing the second cam 20 to be unable to stably abut against the side wall of the vertical groove 1302, thereby weakening the effect of offsetting the bending reaction force of the workpiece. However, by using lightweight materials to manufacture these components, the vertical tension generated by their own weight can be significantly reduced, ensuring that the pulling force of the column spring 21 is sufficient to make the second cam 20 tightly abut against the side wall of the vertical groove 1302. This not only ensures the effective offsetting of the reaction force of the workpiece, but also improves the response sensitivity and stability of the entire engagement assembly.

[0074] Please see Figure 1 , Figure 11 The follower 10 is connected to the drive assembly. The follower 10 cooperates with the coaxial wheel set and can cause multiple sets of the clamping assembly to open and close sequentially when the milling head 6 moves along the length direction of the workpiece.

[0075] The follower 10 has a vertical surface 1002 on the side opposite to the milling head 6. Each end of the vertical surface 1002 has a set of inclined surfaces 1001. The inclined surfaces 1001 roll with the first cam 19 and can drive the second cam 20 to move along the relief groove.

[0076] During the milling operation, the motor 3 can move precisely along the length of the workpiece, thereby driving the milling head 6 to perform the corresponding cutting action. At the same time, the follower 10 also moves synchronously with the milling head 6. To facilitate a more intuitive understanding of its working principle, the following will focus on the working scenario of the follower 10 moving downwards as an example for detailed explanation.

[0077] When the follower 10 moves downward, its lower inclined surface 1001 first contacts and abuts against the first cam 19. As the follower 10 continues to move downward, the second cam 20 gradually moves downward along the guide of the vertical groove 1302. During this process, relative sliding occurs between the connector 17 and the driven member 18. When the second cam 20 moves to the bottom end of the vertical groove 1302, the inclined surface 1001 drives the second cam 20 to change its direction of movement and begin moving along the inclined groove 1301. At this time, the second cam 20 exerts a pulling effect on the telescopic shaft 15, thereby causing the arc-shaped clamping member 16 to gradually separate from the workpiece. When the second cam 20 reaches the end of the inclined groove 1301, the first cam 19 abuts against the vertical surface 1002. At this time, the arc-shaped clamping member 16 can remain separated from the workpiece, thus freeing up sufficient operating space for the milling operation of the milling head 6. Even if the upper arc-shaped clamping member 16 has separated from the workpiece at this time, the lower clamping component still maintains a stable clamping effect on the workpiece, ensuring that the workpiece still has a certain stability during the milling process and avoiding unnecessary displacement or shaking of the workpiece due to loss of support.

[0078] As the milling operation continues, the follower 10 continues to move downwards according to the preset program. At this time, the first convex shaft 19 on the upper clamping assembly slides out from the inclined surface 1001 on the upper part of the follower 10 and separates from the follower 10. The precise completion of this action will achieve the re-clamping of the workpiece. Immediately afterwards, the follower 10 will cooperate with the first convex shaft 19 on the lower clamping assembly, driving the two sets of arc-shaped clamping members 16 at the bottom to separate from the workpiece. This design makes the two adjacent sets of clamping assemblies exhibit a staggered clamping tendency for long workpieces, thus cleverly achieving a seamless connection of clamping force for long workpieces. In actual machining scenarios, this staggered clamping... The design is of paramount importance, as it effectively prevents two sets of clamping components from releasing the workpiece simultaneously. If two sets of clamping components release the workpiece at the same time, it may result in insufficient lateral support for long workpieces, causing bending deformation in the middle of the workpiece and ultimately affecting machining accuracy. This design, through the staggered action of adjacent clamping components, ensures that long workpieces always receive sufficient support during machining, maintaining their stability. This greatly improves the accuracy and quality of thread milling, meeting the requirements of high-precision machining.

[0079] As an embodiment of the present invention, the application of the high-precision thread milling device as described above in the production of furniture connectors is also proposed.

[0080] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0081] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-precision thread milling device, characterized in that, include: The frame structure and two sets of symmetrically arranged milling heads are connected by a drive assembly. Pneumatic grippers are mounted on the frame structure; Multiple sets of clamping components are installed on the frame structure. The multiple sets of clamping components are arranged vertically in space, and the clamping components cooperate with the pneumatic grippers to fix the workpiece. A coaxial wheel assembly is tactilely connected to a relief groove provided on the engagement assembly; A follower is connected to the drive assembly. The follower cooperates with the coaxial wheel set and can cause multiple sets of the clamping assemblies to open and close sequentially when the milling head moves along the length direction of the workpiece. The clamping assembly includes a vertical shaft fixedly installed on the frame structure, a side plate connected to the vertical shaft, a sliding connection part fixedly installed on the side plate, a telescopic shaft slidably installed in the sliding connection part, and an arc-shaped clamping component detachably installed at one end of the telescopic shaft; The clamping assembly also includes a cylindrical spring at one end that is rotatably connected to the side plate; The clearance groove includes a vertical groove provided on the side plate, and the two ends of the vertical groove are connected to inclined grooves that are away from the arc-shaped clamping member. When the coaxial wheel assembly is in the vertical groove, the arc-shaped clamping member is locked in position. When the coaxial wheel assembly moves along the inclined groove, the arc-shaped clamping member can move away from the workpiece. The coaxial wheel assembly includes a slider and a driven member fixedly connected to the slider. A first convex shaft and a second convex shaft are rotatably mounted on both sides of the driven member. The follower has a vertical surface on the side away from the milling head, and each end of the vertical surface has a set of inclined surfaces. The inclined surfaces roll into contact with the first cam shaft, which can drive the second cam shaft to move along the relief groove.

2. The high-precision thread milling device according to claim 1, characterized in that, The drive assembly includes a cross slide adjustment structure disposed on the frame structure, and a motor is fixedly installed on the cross slide adjustment structure. The drive assembly also includes a connecting plate that connects to the cross slide adjustment structure. The connecting plate is provided with a rotation kit, which is connected to the milling head and is connected to the output shaft of the motor via a toothed belt.

3. The high-precision thread milling device according to claim 2, characterized in that, The self-rotating assembly includes a rotating ring that rotatably engages with the connecting plate, the rotating ring being connected to the toothed belt, and the rotating ring being rotatably connected to the milling head; The self-rotating assembly also includes a gear fixedly connected coaxially to the milling head, the gear meshing with an internal gear ring disposed on the connecting plate.

4. The high-precision thread milling device according to claim 1, characterized in that, The other end of the telescopic shaft is equipped with a connector, and the connector is provided with a sliding groove, allowing the slider on the coaxial wheel assembly to slide within the sliding groove. When the coaxial wheel assembly moves along the relief groove, the slider can slide relative to the groove.

5. The high-precision thread milling device according to claim 4, characterized in that, The second convex shaft is rotatably connected to the cylindrical spring; the second convex shaft is capable of rolling within the relief groove.

6. The application of the high-precision thread milling device as described in any one of claims 1 to 5 in the production of furniture connectors.

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