High-precision thread milling device and application thereof in furniture connecting piece production

Abstract

The invention relates to the technical field of thread milling, in particular to a high-precision thread milling device and application thereof in furniture connecting piece production, the high-precision thread milling device comprises a frame body structure and two groups of milling heads which are symmetrically arranged, and the frame body structure and the two groups of milling heads are connected through a driving assembly; the pneumatic clamping jaw is arranged on the frame body structure; the multiple sets of cohesion assemblies are arranged on the frame body structure, the multiple sets of cohesion assemblies are arranged in the vertical direction of the space, and the cohesion assemblies are matched with the pneumatic clamping jaws and can fix workpieces; the coaxial wheel set is in rolling connection with a receding groove formed in the cohesion assembly; and the follow-up piece is connected with the driving assembly, the follow-up piece is matched with the coaxial wheel set, and when the milling head moves in the length direction of the workpiece, the multiple sets of cohesion assemblies can be sequentially opened and closed, so that in the process of milling the workpiece, the phenomenon that the workpiece is stressed unevenly or is bent and twisted is prevented, and the milling precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of thread milling, and particularly to a high-precision thread milling device and its application in the production of furniture connectors. Background Art

[0002] In furniture, connectors are key components used for furniture assembly and connecting hardware fittings, which can make the furniture structure firm and facilitate disassembly and installation. They mainly include structures such as screws, washers, nuts, etc. Among them, for the connection of two large components, longer screws are required to meet the connection stability.

[0003] In the process of screw processing, the thread milling device is an important equipment indispensable for realizing high-precision thread processing. However, the existing thread milling devices usually use a single milling cutter for milling operations. Although the overall structure of the device is relatively simple and easy to control in this mode, during the milling process, the workpiece to be processed generally adopts a fixed method that combines a bottom clamping tooling and a top cone. This makes it that when the length of the screw to be processed is relatively long, the middle part of the screw will lack support and tend to bend to a certain extent when receiving the unilateral pressure from the single milling cutter, resulting in a relatively low thread processing accuracy at the bending position of the screw. In addition, since the single milling cutter acts on the workpiece in a circular motion, the unilateral force will also cause the screw to reciprocally twist around the positions of its bottom clamping tooling and top cone, easily causing the workpiece to break, thereby reducing the yield rate. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-precision thread milling device and its application in the production of furniture connectors to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A high-precision thread milling device, comprising:

[0007] A frame structure and two sets of symmetrically arranged milling heads, which are connected by a driving component;

[0008] A pneumatic gripper, arranged on the frame structure;

[0009] Multiple sets of clamping components, arranged on the frame structure. The multiple sets of clamping components are arranged along the vertical direction of the space, and the clamping components cooperate with the pneumatic gripper to be able to fix the workpiece;

[0010] A coaxial wheel set, which is in rolling connection with a relief groove arranged on the clamping component;

[0011] A follower is connected to the driving assembly, and the follower cooperates with the coaxial wheel set to enable multiple groups of the engaging assemblies to be opened and closed in sequence when the milling head moves along the length direction of the workpiece.

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

[0013] The driving assembly also includes a connecting plate connected to the cross slide adjustment structure, and a self-rotating kit is arranged on the connecting plate. The self-rotating kit is connected to the milling head, and the self-rotating kit is connected to the output shaft of the motor through a toothed belt.

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

[0015] The self-rotating kit also includes a gear coaxially fixedly connected to the milling head, and the gear is meshed with an internal gear ring arranged on the connecting plate.

[0016] As a further solution of the present invention: the embracing assembly comprises a vertical shaft fixedly mounted on the frame structure, the vertical shaft is connected to a side plate, a sliding connection portion is fixedly mounted on the side plate, a telescopic shaft is slidably mounted in the sliding connection portion, and an arc-shaped clamp is detachably mounted on one end of the telescopic shaft;

[0017] The embracing assembly also includes a columnar spring with one end rotatably connected to the side plate.

[0018] As a further solution of the present invention: a connecting piece is installed at the other end of the telescopic shaft, and a sliding groove is provided on the connecting piece, and a sliding block provided on the coaxial wheel set can slide in the sliding groove;

[0019] When the coaxial wheel set moves along the clearance groove, the sliding block can slide relative to the sliding groove.

[0020] As a further solution of the present invention: the coaxial wheel set includes a follower fixedly connected to the slider, a first convex shaft and a second convex shaft are rotatably mounted on both sides of the follower, and the second convex shaft is rotatably connected to the cylindrical spring;

[0021] The second protruding shaft can roll in the clearance groove.

[0022] As a further solution of the present invention: the said giving way groove comprises a vertical groove arranged on the said side plate, and the two ends of the said vertical groove are connected with inclined grooves which are away from the said arc-shaped clamping member;

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

[0024] As a further solution of the present invention: a vertical surface is arranged on the side of the follower away from the milling head, and a group of inclined surfaces are arranged at both ends of the vertical surface. The inclined surfaces roll with the first cam shaft to drive the second cam shaft to move along the clearance groove.

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

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The symmetrically arranged milling heads enable the forces on both sides of the workpiece to reach a balanced state when the two sets of milling heads act on the workpiece at the same time, thereby avoiding the bending problem of the workpiece caused by the force on one side of the workpiece when only a single set of milling heads is used to mill the workpiece in the traditional way. In the actual processing process, the bending of the workpiece will directly affect the depth of thread milling, thereby having a negative impact on the thread milling accuracy. The symmetrically arranged milling heads of the present invention effectively overcome this problem, 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 setting the engaging components and followers, firstly, the workpiece with a long length can be engaged and released in sections, thereby ensuring the supporting effect for the workpiece with a long length, and at the same time making room for the milling head to ensure the normal progress of thread milling. Secondly, the arc-shaped clamping part can maintain hard support for the workpiece and improve the supporting force. Furthermore, the two adjacent groups of engaging components can be staggered and engaged, thereby achieving seamless connection of the engaging force for the workpiece with a long length, and avoiding the problem of insufficient lateral support force for the workpiece with a long length caused by the two groups of engaging components releasing the workpiece at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The figure is a schematic structural diagram of an embodiment of a high-precision thread milling device.

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

[0031] Figure 3 An exploded view of the local structure of a driving assembly in an embodiment of a high-precision thread milling device.

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

[0033] Figure 5 Schematic structural diagram of the clamping assembly and the coaxial wheel set in an embodiment of a high-precision thread milling device.

[0034] Figure 6 Schematic structural diagram of the clamping assembly and the coaxial wheel set in another angle in an embodiment of a high-precision thread milling device.

[0035] Figure 7 Schematic structural diagram of the clamping assembly in an embodiment of a high-precision thread milling device.

[0036] Figure 8 Schematic structural diagram of the coaxial wheel set in an embodiment of a high-precision thread milling device.

[0037] Figure 9 Schematic structural diagram of the coaxial wheel set, the telescopic shaft, the arc-shaped clamping member, and the connecting member in an embodiment of a high-precision thread milling device.

[0038] Figure 10 Schematic structural diagram of the side plate in an embodiment of a high-precision thread milling device.

[0039] Figure 11 Schematic structural diagram of the motion state of the follower in an embodiment of a high-precision thread milling device.

[0040] In the figure: 1. Frame structure; 2. Cross slide adjustment structure; 3. Motor; 4. Toothed belt; 5. Rotating ring; 6. Milling head; 7. Gear; 8. Link plate; 9. Internal gear 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 part; 15. Telescopic shaft; 16. Arc-shaped clamping member; 17. Connecting member; 1701. Sliding groove; 18. Driven member; 1801. Slide block; 19. First convex shaft; 20. Second convex shaft; 21. Cylindrical spring. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] In addition, an element in the present invention is referred to as "fixed to" or "disposed on" another element, and it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0043] Please refer to Figures 1 to 11 , in an embodiment of the present invention, a high-precision thread milling device includes:

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

[0045] The frame structure 1 is connected to the milling head 6 through a drive assembly. The drive assembly includes a cross slide adjustment structure 2 provided on the frame structure 1. A motor 3 is fixedly installed on the cross slide adjustment structure 2. Among them, the cross slide adjustment structure 2 can enable the motor 3 to have two motion states in the vertical direction, namely a horizontal motion state and a vertical motion state, enabling it to switch the position and attitude 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 strict requirements of milling operations for the initial positioning accuracy, the horizontal motion state of the motor 3 is lockable, which allows the operator to adjust the positions of the motor 3 and the milling head 6 according to the established process parameters before the workpiece is clamped. When the workpiece is accurately positioned, by activating the locking structure (not shown in the figure), the horizontal displacement freedom of the motor 3 can be physically restricted, thereby ensuring the spatial position stability of the milling head 6 during the cutting process. It should be noted that the implementation scheme of this locking structure has a high degree of engineering flexibility. Common implementation methods include, but are not limited to: utilizing the self-locking characteristics of threads (such as the precise fit of a threaded sleeve and a lead screw), a mechanical plug and locking groove structure based on the interlocking principle, and modern drive technologies such as electromagnetic braking. These diverse locking means can be adaptively selected according to the vibration level, load change, 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 downward evenly, enabling the milling head 6 to move along the length direction of the workpiece at a constant rate, ensuring the normal progress of thread milling.

[0048] The driving assembly further includes a connecting plate 8 connecting the cross slide adjusting structure 2. A self-rotating kit is arranged on the connecting plate 8. The self-rotating kit is connected to the milling head 6, and 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 rotatably sleeved on 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 further includes a gear 7 fixedly connected coaxially with the milling head 6. The gear 7 meshes with an internal gear ring 9 arranged on the connecting plate 8.

[0050] In this embodiment, two sets of milling heads 6 are arranged on the rotating ring 5 symmetrically, and the middle part of the rotating ring 5 is designed with a hollow, which ingeniously provides a passage for the workpiece to pass through, providing convenient conditions for subsequent processing operations. Specifically, during the execution of the milling operation, the motor 3 moves precisely along the vertical direction, driving the connecting plate 8, the rotating ring 5 and the milling head 6 to move downward synchronously. At the same time, the workpiece is coaxial with the rotating ring 5. This coaxial design is crucial for ensuring the machining accuracy. In this state, the output shaft of the motor 3 starts to rotate, and drives the rotating ring 5 to rotate stably through the transmission component of the toothed belt 4. Further, the gear 7 connected to the milling head 6 will perform a circular motion driven by the rotating ring 5. The gear 7 and the internal gear ring 9 are in an accurate meshing state. When the gear 7 performs a circular motion, it also rotates itself. This motion mode enables the milling head 6 to not only perform a circular motion but also rotate itself. Thus, with the efficient cooperation of the two sets of milling heads 6, the thread milling of the workpiece is realized, greatly accelerating the milling speed and significantly improving the machining efficiency.

[0051] It should be emphasized that in this application, the symmetrical arrangement of the two sets of milling heads 6 has important significance and obvious advantages. When the two sets of milling heads 6 act on the workpiece simultaneously, they can make the forces on both sides of the workpiece reach a balanced state. This design of balanced force ingeniously avoids the problem of workpiece bending caused by unilateral force on the workpiece when using only a single set of milling head 6 to mill the workpiece in the traditional way. In the actual machining process, workpiece bending will directly affect the depth of thread milling, and further have a negative impact on the thread milling accuracy. However, this design effectively overcomes this problem through the symmetrically arranged milling heads 6, thus fundamentally ensuring the accuracy of thread machining of the workpiece, providing a reliable guarantee for high-quality thread machining, and improving the overall quality of the product.

[0052] In addition, the milling device is designed with good stability and reliability. Through the symmetrically arranged milling heads 6 and a reasonable transmission design, during the machining process, the forces on each component are evenly distributed, reducing component wear caused by excessive local stress, and extending the service life of the equipment. At the same time, this symmetric layout is also beneficial to improving the rigidity of the equipment, enabling it to maintain a stable working state during high-speed milling, and further ensuring the consistency of machining accuracy and efficiency.

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

[0054] Please refer to Figures 5 to 8 , the pneumatic gripper 11 is arranged on the frame structure 1;

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

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

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

[0058] In this embodiment, multiple groups of clamping components cooperate with the pneumatic gripper 11 to be able to achieve reliable fixation of the workpiece and ensure that the workpiece always maintains a vertical state. 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 machining. The following is a detailed elaboration on the functions and advantages of the clamping component and its related components during the milling process:

[0059] In the initial state, the cylindrical spring 21 can generate 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 accurately move towards the workpiece and closely fit the surface of the workpiece. By firmly clamping the workpiece with two sets of arc-shaped clamping members 16, it can effectively prevent the workpiece from shifting or shaking during the machining process. When the milling head 6 starts to apply a force to the workpiece, since the workpiece has been firmly clamped by the arc-shaped clamping members 16, this structure can significantly inhibit the tendency of the workpiece to bend due to uneven force. Especially when machining a long workpiece, this effect of inhibiting bending is particularly important, which can effectively avoid thread machining errors caused by workpiece deformation, thereby ensuring that the machined threads can 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 enables multiple sets of clamping components to act on the workpiece evenly at equal intervals. This equal-interval action method can not only ensure that the workpiece is evenly stressed 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 a predetermined position of the workpiece, the two arc-shaped clamping members 16 at the corresponding position can move away from the workpiece, thus leaving enough space for the milling operation of the milling head 6. This avoids interfering with the normal operation of the milling head 6 due to the clamping force of the arc-shaped clamping members 16 and ensures the smooth progress of the milling process.

[0061] Particularly crucial is that although some of the arc-shaped clamping members 16 will temporarily move away from the workpiece during the milling operation, the remaining clamping components can still firmly clamp the workpiece. This segmented-release clamping method enables the workpiece to be effectively supported and fixed as a whole while being locally milled. When the milling head 6 acts on the workpiece and causes the workpiece to tend to bend, since the force can be more concentrated on a specific area of the workpiece and the clamping components in other areas continue to function, the degree of bending of the workpiece due to the force is significantly reduced. This combination of local release and overall fixation not only improves the machining accuracy but also effectively reduces the residual stress in the workpiece during the machining process, thereby improving the final machining quality and service life of the workpiece.

[0062] In summary, the structural design and precise coordinated actions of the clamping components and the pneumatic chuck 11 in this embodiment achieve reliable fixation and dynamic adjustment of the workpiece, effectively inhibit the bending deformation of the workpiece during the machining process, and improve the accuracy and quality of thread milling.

[0063] In practical applications, the advantages of the clamping assembly and the pneumatic clamp 11 will be more obvious. For example, when processing high-precision threaded parts, such as key parts in the aerospace field, transmission threads in precision machinery, etc., there are extremely strict requirements on the dimensional accuracy, surface roughness and overall quality of the threads. Traditional workpiece clamping methods are often difficult to meet these high-precision processing requirements. The clamping assembly in this design can ensure that the workpiece always remains in a stable state during the processing process through its unique combination of segmented release and overall fixation, thereby processing threaded products that meet high quality standards.

[0064] At the same time, this design can also effectively extend the service life of the equipment. Since the clutch assembly can reasonably distribute the force on the workpiece during the processing process and reduce the additional load on the equipment caused by the deformation of the workpiece, the wear and damage risk of key components of the equipment is reduced, which is of great significance for improving the reliability of the equipment and reducing maintenance costs.

[0065] See also Figures 7 to 10 The other end of the telescopic shaft 15 is provided with a connecting member 17, and the connecting member 17 is provided with a slide groove 1701, and a slider 1801 provided on the coaxial wheel set can slide in the slide groove 1701;

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

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

[0068] The second convex shaft 20 can roll in the clearance groove;

[0069] The coaxial wheel set is rollingly connected to the clearance groove arranged on the embracing assembly, and the clearance groove includes a vertical groove 1302 arranged on the side plate 13, and the two ends of the vertical groove 1302 are connected to the inclined groove 1301 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, and 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 processing 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 pulling, it ensures that the second convex shaft 20 is accurately positioned at the predetermined position in the vertical groove 1302. Such a pre-positioning design lays a solid foundation for the subsequent processing process. When the workpiece has a bending tendency due to external forces, the workpiece will transfer the reaction force to the telescopic shaft 15 through the close contact surface with the arc-shaped clamping member 16, and then conduct 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 its movement, the second convex shaft 20 will closely abut against the side wall of the vertical groove 1302, forming a stable mechanical support, thereby effectively offsetting the bending reaction force of the workpiece.

[0072] This design makes the telescopic shaft 15 and the arc-shaped clamping member 16 in a locked and stable state in the initial state, realizing the hard abutment between the arc-shaped clamping member 16 and the workpiece. The advantage of this hard abutment is that it not only enhances the clamping effect on the workpiece but also avoids the problem that the clamping force generated solely by the cylindrical spring 21 may be too small. In an actual processing scenario, if only relying on the spring force for clamping, when the workpiece is subjected to a large cutting force or vibration, the cylindrical spring 21 may deform, resulting in insufficient clamping force and affecting the stability of the workpiece.

[0073] It should be particularly noted that the selection of the cylindrical spring 21 is crucial. In this application, a spring with a larger stiffness should be selected to ensure that it has sufficient initial elastic force and stability. At the same time, the driven member 18, the first convex shaft 19, and the second convex shaft 20 should be made of materials with a smaller density, such as aluminum alloy. Based on the selection of the above materials, in the initial state, the second convex shaft 20 needs to be stably located in the vertical groove 1302 by the pulling force of the cylindrical spring 21. If the material density of the driven member 18, the first convex shaft 19, and the second convex shaft 20 is large, the vertical pulling force generated by their own gravity may exceed the pulling force of the cylindrical spring 21, resulting in the second convex shaft 20 being 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. By using lightweight materials to manufacture these components, the vertical pulling force generated by their own gravity can be significantly reduced, ensuring that the pulling force of the cylindrical spring 21 is sufficient to make the second convex shaft 20 closely abut against the side wall of the vertical groove 1302. This not only ensures the effective offset of the reaction force of the workpiece but also improves the response sensitivity and stability of the entire clamping assembly.

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

[0075] A vertical surface 1002 is provided on the side of the follower 10 away from the milling head 6, and a group of inclined surfaces 1001 are respectively provided at both ends of the vertical surface 1002. The inclined surfaces 1001 are rollingly matched with the first cam 19 to drive the second cam 20 to move along the clearance groove.

[0076] During the milling operation, the motor 3 can move precisely along the length direction of the workpiece, thereby driving the milling head 6 to perform corresponding cutting actions. At the same time, the follower 10 also keeps synchronous movement with the milling head 6. In order to facilitate a more intuitive understanding of its working principle, the following will focus on the working scene where the follower 10 moves downward as an example for detailed description.

[0077] When the follower 10 moves downward, the inclined surface 1001 at the lower part thereof will first contact and abut against the first convex shaft 19. As the follower 10 continues to move downward, the second convex shaft 20 will gradually move downward along the guide of the vertical groove 1302. In this process, relative sliding will occur between the connecting member 17 and the follower 18. When the second convex shaft 20 moves to the bottom end position of the vertical groove 1302, the inclined surface 1001 will drive the second convex shaft 20 to change the direction of movement and start to move along the inclined groove 1301. At this time, the second convex shaft 20 will have a pulling effect on the telescopic shaft 15, thereby gradually separating the arc-shaped clamping member 16 from the workpiece. When the second convex shaft 20 reaches the end of the inclined groove 1301, the first convex shaft 19 will abut against the vertical surface 1002. At this time, the arc-shaped clamping member 16 can remain separated from the workpiece, thereby freeing up sufficient operating space for the milling operation of the milling head 6. Even if the upper arc-shaped clamping member 16 has been separated from the workpiece at this time, the lower engaging assembly still maintains a stable engaging 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 downward according to a preset program. At this time, the first convex shaft 19 on the upper clamping assembly will slide out from the inclined surface 1001 on the upper part of the follower 10 and separate 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 to drive the two groups of arc-shaped clamping members 16 at the lower part to separate from the workpiece. This design enables the adjacent two groups of clamping assemblies to show a tendency of staggered clamping of the workpiece with a longer length, thus cleverly realizing the seamless connection of the clamping force on the workpiece with a longer length. In an actual machining scenario, this staggered clamping design is of crucial significance. It can effectively prevent the situation where two groups of clamping assemblies simultaneously release the workpiece at the same moment. If two groups of clamping assemblies release the workpiece simultaneously, it may lead to insufficient lateral support force for the workpiece with a longer length, thereby causing the middle part of the workpiece to be stressed and bent, ultimately affecting the machining accuracy. However, through the staggered actions of the adjacent clamping assemblies in this design, it is ensured that the workpiece with a longer length always receives sufficient support force during the machining process and maintains its stable state, thus greatly improving the accuracy and quality of the thread milling process and meeting the requirements of high-precision machining.

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

[0080] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0081] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard 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: A frame structure and two sets of symmetrically arranged milling heads, which are connected by a drive assembly; A pneumatic clamping jaw is arranged on the frame structure; A plurality of groups of embracing components are arranged on the frame structure, the plurality of groups of embracing components are arranged along the vertical direction of the space, and the embracing components cooperate with the pneumatic clamps to fix the workpiece; A coaxial wheel set is rollingly connected with a clearance groove arranged on the engaging assembly; A follower is connected to the driving assembly, and the follower cooperates with the coaxial wheel set to enable multiple groups of the engaging assemblies to be opened and closed in sequence when the milling head moves along the length direction of the workpiece.

2. The high-precision thread milling device according to claim 1, wherein The driving assembly comprises a cross slide adjustment structure arranged on the frame structure, and a motor is fixedly mounted on the cross slide adjustment structure; The driving assembly also includes a connecting plate connected to the cross slide adjustment structure, and a self-rotating kit is arranged on the connecting plate. The self-rotating kit is connected to the milling head, and the self-rotating kit is connected to the output shaft of the motor through a toothed belt.

3. The high-precision thread milling device according to claim 2, wherein The self-rotating kit includes a rotating ring rotatably sleeved with the connecting plate, the rotating ring is connected to the toothed belt, and the rotating ring is rotatably connected to the milling head; The self-rotating kit also includes a gear coaxially fixedly connected to the milling head, and the gear is meshed with an internal gear ring arranged on the connecting plate.

4. The high-precision thread milling device according to claim 1, characterized in that, The embracing assembly comprises a vertical shaft fixedly mounted on the frame structure, the vertical shaft is connected to a side plate, a sliding connection portion is fixedly mounted on the side plate, a telescopic shaft is slidably mounted in the sliding connection portion, and an arc-shaped clamp is detachably mounted on one end of the telescopic shaft; The embracing assembly also includes a columnar spring with one end rotatably connected to the side plate.

5. The high-precision thread milling device according to claim 4, characterized in that, The other end of the telescopic shaft is provided with a connecting piece, the connecting piece is provided with a sliding groove, and the sliding block provided on the coaxial wheel set can slide in the sliding groove; When the coaxial wheel set moves along the clearance groove, the sliding block can slide relative to the sliding groove.

6. The high-precision thread milling device according to claim 5, characterized in that, The coaxial wheel set comprises a follower fixedly connected to the slider, a first convex shaft and a second convex shaft are rotatably mounted on both sides of the follower, and the second convex shaft is rotatably connected to the cylindrical spring; The second protruding shaft can roll in the clearance groove.

7. The high-precision thread milling device according to claim 4, characterized in that The give-way groove comprises a vertical groove arranged on the side plate, and both ends of the vertical groove are connected with inclined grooves away from the arc-shaped clamping member; When the coaxial wheel set is in the vertical groove, the arc-shaped clamping member is locked in position, and when the coaxial wheel set moves along the inclined groove, the arc-shaped clamping member can move away from the workpiece.

8. The high-precision thread milling device according to claim 6, characterized in that, A vertical surface is arranged on the side of the follower away from the milling head, and a group of inclined surfaces are arranged at both ends of the vertical surface. The inclined surfaces are in rolling cooperation with the first convex shaft to drive the second convex shaft to move along the clearance groove.

9. Application of the high-precision thread milling device as claimed in any one of claims 1 to 8 in the production of furniture connectors.

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