Numerical control turning tool with tool bit convenient to replace

Abstract

The utility model discloses a numerical control turning tool with a tool bit convenient to replace, which relates to the technical field of numerical control turning tools and comprises a clamping groove arranged on the inner wall of a connecting end of a tool bit body, and a guide dip angle is arranged at a notch of the clamping groove. A clamping assembly matched with the clamping groove is fixedly arranged at the connecting end of the cutter handle, and the cutter head body and the cutter handle are detachably connected through cooperation of the clamping assembly and the clamping groove; the external inclination angle of the clamping block is matched with the guide inclination angle of the clamping groove, bidirectional constraint of radial clamping and axial pre-tightening is achieved, the blade is pre-assembled in advance, the stability of a tool bit in the machining process is guaranteed, the convenience in the tool changing process is improved, the machining precision is improved, and the machining efficiency is improved. The problems that a tool bit and a clamping end of a tool handle of an existing tool are connected in a single sliding mode, a limiting device and a locking device are not matched, and the clamping position is located in the middle of the tool handle, so that the tool bit can generate large tool swing when being vibrated during machining, and the machining error is increased are solved.

Description

Technical Field

[0001] This utility model relates to the field of CNC turning tool technology, specifically a CNC turning tool with an easy-to-change tool head. Background Technology

[0002] A CNC turning tool is a cutting tool with a cutting part used for turning. CNC turning tools are one of the most widely used cutting tools in machining. The working part of the turning tool is the part that generates and processes chips, including the cutting edge, the structure that breaks or rolls the chips, the space for chip removal or storage, and the channel for cutting fluid.

[0003] For example, utility model patent CN221817353U discloses an adjustable cutting tool for CNC machine tools, including a fixing component, a first adjusting component, a second adjusting component, and a limiting component. This utility model, by setting up a rotation adjustment mechanism and an adjustment limiting mechanism, allows the user to rotate the cutting tool without removing and reinstalling it, and eliminates the need to repeatedly turn the screws when fixing the rotated cutting tool, thus simplifying the manual rotation process.

[0004] However, the cutting head and the clamping end of this tool are connected by a single sliding method without any limiting or locking devices. Furthermore, the clamping point is located in the middle of the tool holder. This causes the cutting head to wobble significantly when subjected to vibration during machining, resulting in increased machining errors. In addition, because the cutting head and the tool holder are connected by a sliding method, the cutting head must be completely pulled out before tool changing can be performed, requiring a large space for tool changing. In some cases, the tool must be reset before tool changing can be performed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a CNC turning tool that facilitates tool head replacement. It solves the problems of existing devices where the tool head and tool holder are connected by a single sliding mechanism without any limiting or locking devices, and the clamping point is located in the middle of the tool holder. This causes significant tool wobble during machining due to vibration, leading to increased machining errors. Furthermore, because the tool head and tool holder are connected by a sliding mechanism, the tool head must be completely pulled out before tool replacement, requiring a large tool replacement space and, in some cases, necessitating tool resetting before replacement.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A CNC turning tool with an easily replaceable cutting head includes a cutting head body, cutting inserts, and a pressure plate. The cutting inserts and the pressure plate are respectively threaded to the cutting head body. The tool also includes:

[0008] A snap-fit ​​groove is formed on the inner wall of the connecting end of the cutter head body, and a guide angle is provided at the opening of the snap-fit ​​groove;

[0009] The handle has a snap-fit ​​component that is adapted to the snap-fit ​​groove fixedly installed at its connecting end. The cutter head body and the handle are detached and connected through the cooperation of the snap-fit ​​component and the snap-fit ​​groove.

[0010] An adjusting rod has an adjusting sliding hole extending along its length at its tail end. Several evenly distributed keyways are provided on the side wall of the adjusting sliding hole. The adjusting rod is slidably connected to the inner wall of the tool holder. An adjusting tilt angle is provided at its top end. The adjusting tilt angle is slidably adapted to the locking assembly.

[0011] A drive motor is fixedly installed on the inner wall of the tool holder. A guide rod is fixedly installed on its drive end. The connecting end of the guide rod is slidably adapted to the adjusting slide hole. Several guide flat keys that are slidably adapted to the keyway and interlocked are fixedly installed on the side wall of the guide rod.

[0012] A stepped slide groove is formed on the inner wall of the tool holder, and a threaded adjusting sleeve is fixedly installed on the outer wall of the adjusting rod. The threaded adjusting sleeve is threadedly connected to the large groove end of the stepped slide groove.

[0013] Preferably, the snap-fit ​​assembly includes a mounting base and several guide holes. The mounting base is fixedly installed at the center of the connecting end face of the tool holder, and the several guide holes are evenly opened on its side wall along the circumference of the mounting base. A positioning platform is fixedly installed on the top wall inside the mounting base, and several snap-fit ​​blocks are elastically connected to the side wall of the positioning platform. The several snap-fit ​​blocks correspond one-to-one with the several guide holes and are slidably adapted.

[0014] Preferably, a plurality of spring fixing rods are fixedly installed on the side wall of the positioning platform, and the plurality of spring fixing rods correspond one-to-one with a plurality of guide holes; a spring connecting seat is fixedly installed on the upper wall of the snap-fit ​​block, and a tension spring is connected between the positioning platform and the snap-fit ​​block, with one end of the tension spring fixed on the spring fixing rod and the other end fixed on the spring connecting seat.

[0015] Preferably, the outer wall surface of the snap-fit ​​block is provided with an external tilt angle, which is slidably adapted to the guide tilt angle of the snap-fit ​​groove; the inner wall surface of the snap-fit ​​block is provided with an internal tilt angle, which is slidably adapted to the adjustment tilt angle of the adjustment rod.

[0016] Preferably, the inner wall of the connecting end of the cutter head body is provided with an annular limiting groove, and the outer wall of the connecting end of the cutter handle is fixedly installed with a guide ring, and the guide ring and the limiting groove are coaxially inserted and adapted to each other.

[0017] Preferably, the insertion end of the limiting ring groove has an assembly chamfer.

[0018] Preferably, the tail end of the tool holder is provided with an electrical connection groove, and a power supply module is fixedly installed in the electrical connection groove. The power supply module is electrically connected to the drive motor.

[0019] Beneficial effects

[0020] This utility model provides a CNC turning tool with an easy-to-change cutting head, which has the following advantages:

[0021] By matching the outer tilt angle of the locking block with the guide tilt angle of the locking groove, a two-way constraint of radial clamping and axial pre-tightening is achieved. Combined with the pre-installation of the cutting tool, it not only ensures the stability of the cutting head during machining, but also improves the convenience of tool changing and improves machining accuracy. This solves the problem that the existing cutting tool head and tool holder clamping end uses a single sliding connection without a limit device or locking device, and the clamping point is located in the middle of the tool holder. As a result, the cutting head will generate a large tool wobble when subjected to vibration during machining, which will lead to increased machining errors.

[0022] By using a drive motor to adjust the rod and locking / unlocking the locking block, the tool head body can be quickly disassembled and installed. This reduces the space required for tool changing and minimizes the limitations of tool changing. It solves the problem that existing tools require the tool head to be completely pulled out before tool changing can be performed because the tool head and tool holder are connected in a sliding manner. This also requires a large space for tool changing and, in some cases, the tool needs to be reset before tool changing can be performed. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the knife handle structure of this utility model;

[0025] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0026] Figure 4 This is a schematic diagram of the adjusting rod structure of this utility model;

[0027] Figure 5 This is a schematic diagram of the cutter head body structure of this utility model;

[0028] Figure 6 This is a cross-sectional view of the overall structure of this utility model.

[0029] In the diagram: 1. Cutter head body; 2. Blade; 3. Pressure plate; 4. Snap-fit ​​groove; 5. Guide tilt angle; 6. Tool holder; 7. Adjusting rod; 8. Adjusting slide hole; 9. Keyway; 10. Adjusting tilt angle; 11. Drive motor; 12. Guide rod; 13. Guide key; 14. Stepped slide groove; 15. Threaded adjusting sleeve; 16. Mounting bracket; 17. Guide hole; 18. Positioning platform; 19. Snap-fit ​​block; 20. Spring fixing rod; 21. Spring connecting seat; 22. Tension spring; 23. External tilt angle; 24. Internal tilt angle; 25. Limiting ring groove; 26. Guide ring; 27. Electrical connection groove; 28. Power supply module. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] Please see Figures 1-6 A CNC turning tool with an easily replaceable tool head includes: a tool head body 1, a cutting insert 2, and a pressure plate 3, wherein the cutting insert 2 and the pressure plate 3 are respectively threaded to the tool head body 1, and further includes:

[0032] A snap-fit ​​groove 4 is formed on the inner wall of the connecting end of the cutter head body 1, and a guide angle 5 is provided at the groove opening of the snap-fit ​​groove 4;

[0033] The handle 6 has a snap-fit ​​component that is compatible with the snap-fit ​​groove 4 fixedly installed at its connecting end. The cutter head body 1 and the handle 6 are connected and disassembled through the cooperation of the snap-fit ​​component and the snap-fit ​​groove 4.

[0034] The adjusting rod 7 has an adjusting sliding hole 8 extending along its length at its tail end. The side wall of the adjusting sliding hole 8 has several evenly distributed keyways 9. The adjusting rod 7 is slidably connected to the inner wall of the tool holder 6. The top of the rod is provided with an adjusting tilt angle 10, which is slidably adapted to the snap-fit ​​assembly.

[0035] The drive motor 11 is fixedly installed on the inner wall of the tool holder 6. A guide rod 12 is fixedly installed on its drive end. The connecting end of the guide rod 12 is slidably adapted to the adjusting slide hole 8. Several guide flat keys 13 that are slidably adapted to and plugged into the keyway 9 are fixedly installed on the side wall of the guide rod 12.

[0036] A stepped slide groove 14 is formed on the inner wall of the tool holder 6. A threaded adjusting sleeve 15 is fixedly installed on the outer wall of the adjusting rod 7. The threaded adjusting sleeve 15 is threadedly connected to the large groove end of the stepped slide groove 14.

[0037] When in use, when the locking block 19 is pressed against the guide angle 5, the guide angle 5 can make the cutter head body 1 and the cutter shank 6 contact more tightly and achieve preliminary positioning and calibration, laying the foundation for the subsequent locking structure, while reducing the wear of components during the docking process.

[0038] Please see Figure 3 The snap-fit ​​assembly includes a mounting base 16 and several guide holes 17. The mounting base 16 is fixedly installed at the center of the connecting end face of the tool holder 6. Several guide holes 17 are evenly opened on the side wall of the mounting base 16 along its circumference. A positioning platform 18 is fixedly installed on the top wall inside the mounting base 16. Several snap-fit ​​blocks 19 are elastically connected to the side wall of the positioning platform 18. Several snap-fit ​​blocks 19 correspond one-to-one with several guide holes 17 and are slidably adapted.

[0039] Please see Figure 3 A number of spring fixing rods 20 are fixedly installed on the side wall of the positioning platform 18, and the number of spring fixing rods 20 corresponds one-to-one with a number of guide holes 17; a spring connecting seat 21 is fixedly installed on the upper wall of the snap-fit ​​block 19, and a tension spring 22 is connected between the positioning platform 18 and the snap-fit ​​block 19. One end of the tension spring 22 is fixed on the spring fixing rod 20, and the other end is fixed on the spring connecting seat 21.

[0040] Please see Figure 3 The outer wall of the snap-fit ​​block 19 is provided with an external tilt angle 23, which is slidably adapted to the guide tilt angle 5 of the snap-fit ​​groove 4; the inner wall of the snap-fit ​​block 19 is provided with an internal tilt angle 24, which is slidably adapted to the adjustment tilt angle 10 of the adjustment rod 7.

[0041] In use, the drive motor 11 drives the guide rod 12 to rotate, and the guide key 13 and the keyway 9 work together to drive the adjusting rod 7 to rotate synchronously. The threaded adjustment sleeve 15 and the stepped slide 14 work together to make the adjusting rod 7 move axially. The adjusting tilt angle 10 at the top pushes the locking block 19 to extend outward along the guide hole 17 and lock into the locking groove 4 to achieve locking. Reversing the motor will reset the adjusting rod 7, and the tension spring 22 will pull the locking block 19 back to complete the removal of the cutter head. No additional tools are required, and the replacement is efficient and convenient.

[0042] Please see Figures 2-5 The inner wall of the connecting end of the cutter head body 1 is provided with an annular limiting ring groove 25, and the outer wall of the connecting end of the cutter handle 6 is fixedly installed with a guide ring 26. The guide ring 26 and the limiting ring groove 25 are coaxially inserted and adapted to each other.

[0043] Please see Figure 5 The insertion end of the limiting ring groove 25 has an assembly chamfer.

[0044] In use, the cooperation between the guide ring 26 and the limiting ring groove 25 further improves the coaxiality of the cutter head body 1 and the tool holder 6, avoids eccentric vibration during cutting, and ensures machining accuracy; the chamfering guide ring 26 is smoothly inserted, reducing the difficulty of docking, while protecting the edges of the parts from wear and extending their service life.

[0045] Please see Figure 2The tail end of the tool holder 6 is provided with a power connection groove 27, and a power supply module 28 is fixedly installed in the power connection groove 27. The power supply module 28 is electrically connected to the drive motor 11.

[0046] When in use, the power supply module 28 provides power support to the drive motor 11, making the cutting tool structure more compact and adaptable to different CNC equipment installation and usage scenarios, especially suitable for narrow machining spaces; the power connection slot 27 is equipped with a sealing cover to prevent cutting fluid or iron filings from entering, ensuring the stable operation of the power supply module 28.

[0047] Example 1: In this example, the adjustment rod 7 and the locking block 19 are elastically locked and unlocked by the drive motor 11, so as to realize the quick disassembly and installation of the cutter head body 1, which solves the problem of cumbersome and time-consuming tool changing in traditional threaded connection, and adapts to the high-efficiency tool changing requirements of batch processing scenarios.

[0048] Specifically, when replacing the cutter head, the power supply module 28 in the electrical slot 27 at the tail end of the cutter handle 6 is activated to supply power to the drive motor 11. The drive motor 11 drives the guide rod 12 to reverse, and the guide key 13 on the side wall of the guide rod 12 cooperates with the keyway 9 of the adjusting rod 7, driving the adjusting rod 7 to reverse synchronously. The threaded adjusting sleeve 15 on the outer wall of the adjusting rod 7 moves axially backward along the stepped slide groove 14 of the cutter handle 6, and the adjusting tilt angle 10 at the top of the adjusting rod 7 disengages from the inner tilt angle 24 of the locking block 19. The tension spring 22 between the positioning table 18 and the locking block 19 retracts, pulling the locking block 19 inward along the guide hole 17 through the spring connecting seat 21, disengaging it from the locking groove 4 of the cutter head body 1, thus completing the unlocking. At this time, the cutter head body 1 can be directly pulled out, and its limiting ring groove 25 separates from the guide ring 26 of the cutter handle 6, completing the disassembly.

[0049] When installing a new cutter head, align the limiting ring groove 25 of the new cutter head body 1 with the guide ring 26 of the cutter shank 6, and guide it smoothly with the help of the assembly chamfer to achieve initial coaxial positioning. Start the drive motor 11 to rotate forward, the guide rod 12 drives the adjusting rod 7 to rotate forward, the threaded adjusting sleeve 15 moves forward along the stepped slide groove 14, and the adjusting angle 10 pushes the inner angle 24 of the snap-fit ​​block 19, so that the snap-fit ​​block 19 extends outward along the guide hole 17. The outer angle 23 of the outer wall of the snap-fit ​​block 19 slides and matches the guide angle 5 of the snap-fit ​​groove 4, guiding the snap-fit ​​block 19 to accurately snap into the snap-fit ​​groove 4. The tension spring 22 is in a stretched state, providing a continuous locking force for the snap-fit ​​block 19, completing the cutter head fixing. No additional tools are required throughout the process, making cutter changing highly efficient.

[0050] In Example 2, the external tilt angle 23 of the locking block 19 cooperates with the guide tilt angle 5 of the locking groove 4 to achieve two-way constraint of radial clamping and axial pre-tightening. Combined with the pre-installation of the blade 2, it not only ensures the stability of the tool head body 1 during processing, but also improves the convenience of tool changing, while reducing the tool changing space requirement and reducing the limitations of tool changing.

[0051] Specifically, the cutting tool is pre-installed before machining: the cutting tool 2 is placed in the mounting groove of the tool head body 1, and the cutting tool 2 is pressed and fixed by the threaded connection of the pressure plate 3. This allows for flexible replacement of the cutting tool required for the next machining step if the previous step is not completed, based on the actual machining situation. When installing the tool head, the pre-installed tool head body 1 is aligned with the tool holder 6. The limiting ring groove 25 is guided by the assembly chamfer and coaxially inserted with the guide ring 26, initially ensuring the coaxiality of the tool head and the tool holder, laying the foundation for high-precision machining.

[0052] The drive motor 11 is activated, driving the adjusting rod 7 forward. The adjusting angle 10 pushes the locking block 19 outward along the guide hole 17, and the outer angle 23 of the locking block 19 fits tightly with the guide angle 5 of the locking groove 4. As the locking block 19 continues to extend, the angle engagement generates a bidirectional force: on the one hand, it clamps the cutter head body 1 radially, restricting its circumferential rotation; on the other hand, it decomposes the axial preload towards the tool holder 6, firmly pressing the cutter head body 1 against the tool holder connection end, eliminating gap vibration during machining. At the same time, multiple circumferentially evenly distributed locking blocks 19 are simultaneously subjected to force, and the locking force is evenly transmitted. Combined with the positioning constraint of the guide ring 26 and the limiting ring groove 25, it further prevents the cutter head from deviating or jumping during cutting.

[0053] During machining, the pre-fixed insert 2 and the cutter head body 1 have no relative displacement. The two-way clamping structure ensures the overall rigidity of the cutter head, and can maintain stable machining accuracy even when facing high-intensity cutting loads. It is especially suitable for continuous machining scenarios of precision parts.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A CNC turning tool with an easily replaceable cutting head, comprising a cutting head body (1), a cutting insert (2), and a pressure plate (3), wherein the cutting insert (2) and the pressure plate (3) are respectively threadedly connected to the cutting head body (1), characterized in that, Also includes: A snap-fit ​​groove (4) is formed on the inner wall of the connecting end of the cutter head body (1), and a guide angle (5) is provided at the opening of the snap-fit ​​groove (4). The handle (6) has a snap-fit ​​component that is adapted to the snap-fit ​​groove (4) fixedly installed at its connecting end. The cutter head body (1) and the handle (6) are disassembled and connected through the cooperation of the snap-fit ​​component and the snap-fit ​​groove (4). The adjusting rod (7) has an adjusting sliding hole (8) extending along the length direction at its tail end. The side wall of the adjusting sliding hole (8) has several evenly distributed keyways (9). The adjusting rod (7) is slidably connected to the inner wall of the tool holder (6). The top of the rod has an adjusting tilt angle (10). The adjusting tilt angle (10) is slidably adapted to the snap-fit ​​assembly. A drive motor (11) is fixedly installed on the inner wall of the tool holder (6). A guide rod (12) is fixedly installed on its drive end. The connecting end of the guide rod (12) is slidably adapted to the adjusting slide hole (8). Several guide flat keys (13) that are slidably adapted to and plugged into the keyway (9) are fixedly installed on the side wall of the guide rod (12). A stepped slide groove (14) is formed on the inner wall of the tool holder (6). A threaded adjusting sleeve (15) is fixedly installed on the outer wall of the adjusting rod (7). The threaded adjusting sleeve (15) is threadedly connected to the large groove end of the stepped slide groove (14).

2. The CNC turning tool with an easily replaceable cutting head according to claim 1, characterized in that, The snap-fit ​​assembly includes a mounting base (16) and several guide holes (17). The mounting base (16) is fixedly installed at the center of the connecting end face of the tool holder (6). Several guide holes (17) are evenly opened on the side wall of the mounting base (16) along the circumference. A positioning platform (18) is fixedly installed on the top wall inside the mounting base (16). Several snap-fit ​​blocks (19) are elastically connected to the side wall of the positioning platform (18). Several snap-fit ​​blocks (19) correspond one-to-one with several guide holes (17) and slide to fit.

3. A CNC turning tool with an easily replaceable cutting head according to claim 2, characterized in that, The side wall of the positioning platform (18) is fixedly equipped with several spring fixing rods (20), and the several spring fixing rods (20) correspond one-to-one with several guide holes (17); the upper wall of the snap-fit ​​block (19) is fixedly equipped with a spring connecting seat (21), and a tension spring (22) is connected between the positioning platform (18) and the snap-fit ​​block (19). One end of the tension spring (22) is fixed on the spring fixing rod (20), and the other end is fixed on the spring connecting seat (21).

4. A CNC turning tool with an easily replaceable cutting head according to claim 2, characterized in that, The outer wall of the snap-fit ​​block (19) is provided with an external tilt angle (23), which is slidably adapted to the guide tilt angle (5) of the snap-fit ​​groove (4); the inner wall of the snap-fit ​​block (19) is provided with an internal tilt angle (24), which is slidably adapted to the adjustment tilt angle (10) of the adjustment rod (7).

5. A CNC turning tool with an easily replaceable cutting head according to claim 1, characterized in that, The inner wall of the connecting end of the cutter head body (1) is provided with an annular limiting ring groove (25), and the outer wall of the connecting end of the cutter handle (6) is fixedly installed with a guide ring (26). The guide ring (26) and the limiting ring groove (25) are coaxially inserted and adapted.

6. A CNC turning tool with an easily replaceable tool head according to claim 5, characterized in that, The insertion end of the limiting ring groove (25) is provided with an assembly chamfer.

7. A CNC turning tool with an easily replaceable tool head according to claim 1, characterized in that, The tail end of the handle (6) is provided with an electrical connection groove (27), and a power supply module (28) is fixedly installed in the electrical connection groove (27). The power supply module (28) is electrically connected to the drive motor (11).

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