A quick-change PCD cutter clamping device

Abstract

The application belongs to the technical field of machining, and particularly relates to a quick-change PCD cutter clamping device, which comprises a fixed driving unit and a movable rotating unit, the number of the movable rotating units is at least two, the fixed driving unit comprises a first fixed shaft sleeve, a transmission shaft rod is rotationally connected in the first fixed shaft sleeve, a driving coupling is fixedly connected to the lower end of the transmission shaft rod, the lower side of the driving coupling is a first coupling part, the movable rotating unit comprises a movable shaft sleeve, a rotating shaft is rotationally connected in the movable shaft sleeve, a PCD cutter is installed on the lower end of the rotating shaft, the upper side of the rotating shaft is a second coupling part, and the first coupling part of the driving coupling can be magnetically coupled with the second coupling part of any rotating shaft. The application can reduce the process of stopping the rotating transmission shaft rod and rotating the transmission shaft rod again during tool changing, reduce the operation steps in the tool changing process, and improve the tool changing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, specifically relating to a quick-change PCD tool clamping device. Background Technology

[0002] In the field of machining, PCD (polycrystalline diamond) tools are widely used for precision and ultra-precision machining of aluminum alloys, copper alloys, composite materials, and difficult-to-machine materials due to their high hardness, high wear resistance, and excellent thermal conductivity. With the increasing demands for processing efficiency and flexibility in automated production lines and machining centers, rapid tool change technology for PCD tools has become one of the key factors affecting the overall utilization rate of equipment.

[0003] Currently, common PCD tool clamping devices mainly include two types. One type is a fixed clamping structure that uses threaded clamping or hydraulic clamping. The tool is fixed to the spindle or tool holder by screws or pull studs. When changing the tool, the machine needs to be stopped and the old tool needs to be removed and the new tool needs to be installed and the tool setting process needs to be completed in sequence. The tool changing time is long and the operation is cumbersome, which seriously affects the continuity of processing and production efficiency. Another option is a clamping system that uses a tool magazine in conjunction with a robotic arm to achieve automatic tool changing. Although it can shorten the tool changing auxiliary time to some extent, it has a complex structure, high cost, and requires the spindle drive to be turned off and the spindle to be completely stationary before it can be unlocked and disassembled, which significantly occupies the effective machining time. Summary of the Invention

[0004] The purpose of this invention is to provide a quick-change PCD tool clamping device that can reduce the process of stopping and restarting the drive shaft during tool changing, thereby reducing the number of operation steps and improving tool changing efficiency.

[0005] The specific technical solution adopted by this invention is as follows: A quick-change PCD tool clamping device includes a fixed drive unit and a movable rotary unit, wherein the number of movable rotary units is at least two. The fixed drive unit includes a first fixed bushing, a transmission shaft is rotatably connected inside the first fixed bushing, a drive coupling is fixedly connected to the lower end of the transmission shaft, and the lower side of the drive coupling is a first coupling part; The movable rotating unit includes a movable bushing, and a rotating shaft is rotatably connected inside the movable bushing. A PCD tool body is installed at the lower end of the rotating shaft. The upper side of the rotating shaft is the second coupling part, and the first coupling part of the driving coupling member can be magnetically coupled to the second coupling part of any rotating shaft.

[0006] Furthermore, it also includes a rotating bracket, which includes a second fixed bushing, a rotating rod body rotatably connected inside the second fixed bushing, a central turntable fixedly connected to the lower end of the rotating rod body, at least two connecting arms fixedly connected to the periphery of the central turntable, a U-shaped frame fixedly connected to one end of each connecting arm, and the movable bushing mounted on the U-shaped frame.

[0007] Furthermore, the U-shaped frame is hinged to the movable bushing, and the rotating bracket also includes a rotation adjustment assembly adapted to the movable bushing.

[0008] Furthermore, the connecting arm includes a guide sleeve fixedly connected to the outside of the central turntable. All guide sleeves have slide bars slidably connected inside. One end of the slide bar is fixedly connected to the U-shaped frame. A guide rod is fixedly connected to the slide bar. A guide groove is provided on the guide sleeve. The guide groove and the guide rod are slidably connected. One end of the guide rod extends to the upper side of the guide sleeve through the guide groove. A guide rail is also fixedly connected to the lower side of the second fixed bushing. The guide rod and the guide rail are slidably connected.

[0009] Furthermore, the rotation adjustment assembly includes a lower support block fixedly connected to the lower side of the guide sleeve.

[0010] Furthermore, a locking assembly adapted to the movable bushing is fixedly connected to the outer side of the first fixed bushing. The locking assembly includes a guide housing and a limiting block. The guide housing is fixedly connected to the outer side of the first fixed bushing. A slider is slidably connected inside the guide housing. A locking rod is fixedly connected to the lower end of the slider. A through hole opposite to the locking rod is opened on the lower side of the guide housing. The lower end of the locking rod extends to the lower side of the guide housing through the through hole. The limiting block is fixedly connected to the outer side of the movable bushing. A locking hole adapted to the locking rod is opened on the limiting block. The locking rod can be inserted into the inside of the locking hole. The guide housing is also fixedly connected to a linear moving assembly that is connected to the slider body for transmission.

[0011] Furthermore, the linear movement assembly includes an electromagnet fixedly connected to the upper side of the guide housing, an iron sheet fixedly connected to the upper side of the slider body, and a return spring fixedly connected between the electromagnet and the slider body.

[0012] The technical effects achieved by this invention are as follows: The present invention provides a quick-change PCD tool clamping device by setting a fixed drive unit and at least two movable rotary units, and the first coupling part of the drive coupling member can be magnetically coupled to the second coupling part of any rotary shaft. This allows the switching of PCD tools to be completed simply by moving the coupled rotary unit out and the ready-to-use rotary unit in. During this process, the drive shaft can be continuously rotated without frequent starting and stopping of the drive unit, thus enabling the PCD tool to be changed without stopping the machine. This reduces the need to stop and restart the drive shaft during tool changing, thereby reducing the number of operation steps and improving the efficiency of tool changing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a schematic diagram of the structure of the guide rod and guide rail of the present invention; Figure 4 This is a cross-sectional structural diagram of the first fixed bushing and the movable bushing of the present invention; Figure 5 This is a cross-sectional structural diagram of the movable bushing of the present invention; Figure 6 This is the present invention. Figure 1 A schematic diagram of the partial cross-sectional structure at point A in the middle.

[0014] The attached diagram lists the components represented by each number as follows: 1. First fixed bushing; 2. Transmission shaft; 3. Movable bushing; 4. Drive coupling component; 5. Rotary shaft; 6. Connecting sleeve; 7. Screw; 8. PCD tool body; 9. Second fixed bushing; 10. Rotating rod body; 11. Central turntable; 12. Guide sleeve; 13. Sliding bar; 14. U-shaped frame; 15. Guide groove; 16. Guide round rod; 17. Guide rail; 18. Lower support block; 19. Rotary wheel; 20. Guide housing; 21. Limiting block; 22. Sliding block; 23. Locking rod; 24. Locking hole; 25. Guide slope; 26. Electromagnet; 27. Return spring; 28. Iron sheet. Detailed Implementation

[0015] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0016] like Figures 1-6As shown, a quick-change PCD tool clamping device includes a fixed drive unit and a movable rotary unit, wherein the number of movable rotary units is at least two. The fixed drive unit includes a first fixed bushing 1, a transmission shaft 2 is rotatably connected inside the first fixed bushing 1, a drive coupling 4 is fixedly connected to the lower end of the transmission shaft 2, the lower side of the drive coupling 4 is the first coupling part, the first fixed bushing 1 is fixedly connected to the machine tool, and the upper end of the transmission shaft 2 is fixedly connected to the drive component of the machine tool. The drive component can be a motor or other mechanism capable of outputting rotational force.

[0017] The movable rotating unit includes a movable bushing 3, with a rotating shaft 5 rotatably connected inside the movable bushing 3. The upper side of the rotating shaft 5 is a second coupling part. The first coupling part of the drive coupling member 4 can be coupled to the second coupling part of any rotating shaft 5. The coupling method can be magnetic coupling. After the drive coupling member 4 and the rotating shaft 5 are coupled, the rotation of the drive coupling member 4 can drive the rotating shaft 5 to rotate, thus completing the rotation transmission. Since the connection method is coupling, the movable rotating unit can be moved while the transmission shaft 2 is continuously rotating. This enables the replacement of the PCD tool body 8 without stopping the machine. It can reduce the process of stopping the rotation of the transmission shaft 2 and restarting the rotation of the transmission shaft 2 during tool replacement, reducing the operation steps in the tool replacement process and improving the efficiency of tool replacement.

[0018] like Figure 5 As shown, a PCD cutter body 8 is installed at the lower end of the rotating shaft 5. The preferred fixing method is snap-fit. Specifically, a connecting sleeve 6 located outside the movable bushing 3 is fixedly connected to the lower end of the rotating shaft 5. One end of the PCD cutter body 8 can be snapped into the inside of the connecting sleeve 6. A screw 7 is threadedly connected to the outside of the connecting sleeve 6. When the screw 7 abuts against the PCD cutter body 8, the PCD cutter body 8 can be locked.

[0019] The movement of multiple movable rotating units can be linear, rotational, or other modes. In this technical solution, rotational movement is preferred. Specifically, the PCD tool clamping device also includes a rotating bracket, on which multiple movable rotating units are mounted. The rotating bracket can drive multiple movable rotating units to rotate and move the rotation axis 5 of multiple rotating units to the underside of the drive coupling member 4 to complete the coupling.

[0020] like Figures 1-3 As shown, the rotating bracket includes a second fixed bushing 9, and a rotating rod 10 is rotatably connected inside the second fixed bushing 9. The rotating rod 10 is driven by a drive unit, which can be a motor, and the motor is fixedly connected to the machine tool.

[0021] The lower end of the rotating rod body 10 is fixedly connected to a central turntable 11. At least two connecting arms are fixedly connected to the periphery of the central turntable 11. One end of each connecting arm is fixedly connected to a U-shaped frame 14. The movable bushing 3 is mounted on the U-shaped frame 14. When the central turntable 11 rotates, the connecting arms can drive the U-shaped frame 14 to rotate, thereby driving the movable bushing 3 on the U-shaped frame 14 to rotate and move.

[0022] The connection between the U-shaped bracket 14 and the movable bushing 3 can be a fixed connection or a hinged connection. In this technical solution, a hinged connection is preferred. The rotating bracket also includes a rotation adjustment group adapted to the movable bushing 3, which is used to rotate the unused movable rotating unit to a state of approximately horizontal placement, so as to reduce the impact of the unused PCD tool body 8 on the PCD tool body 8 in use.

[0023] like Figures 1-3 As shown, in some embodiments, the connecting arm is a fixed structure, while in other embodiments, the connecting arm is an adjustable length structure. For example, the connecting arm can be an electrically telescopic structure, such as an electrically telescopic rod; the connecting arm can also be a mechanically telescopic structure, such as a connecting arm including a guide sleeve 12 fixedly connected to the outside of the central turntable 11, with a slide bar 13 slidably connected inside each guide sleeve 12. One end of the slide bar 13 is fixedly connected to the U-shaped frame 14, and a guide rod 16 is fixedly connected to the slide bar 13. A guide groove 15 is provided on the guide sleeve 12, and the guide groove 15 and the guide rod 16 are slidably connected, with one end of the guide rod 16 extending through the guide groove 15 to the upper part of the guide sleeve 12. On the side, a guide rail 17 is also fixedly connected to the lower side of the second fixed bushing 9. The guide rod 16 and the guide rail 17 are slidably connected. The guide rail 17 is composed of at least two arc-shaped rails. The distance between the axis of the U-shaped frame 14 and the central turntable 11 is the center distance. When the U-shaped frame 14 moves to the other first fixed bushing 1, the guide rod 16 on the connecting arm is located inside the first arc-shaped rail, and its center distance is L1. When the guide rod 16 moves to the second arc-shaped rail, its center distance is L2. The length of L1 is greater than L2, so that when the movable bushing 3 moves away from the lower side of the first fixed bushing 1, the length of the connecting arm can be automatically reduced, so that the volume of the rotating bracket can be reduced and the space occupied can be reduced.

[0024] like Figures 1-3 As shown, the rotary adjustment assembly includes a lower support block 18 fixedly connected to the lower side of the guide sleeve 12. When the connecting arm retracts, the slide bar 13 drives the movable bushing 3 to move. During the movement, the movable bushing 3 and the lower support block 18 abut against each other and rotate under force until they reach an approximately horizontal state. Thus, the angle of the movable bushing 3 can be adjusted using a simple mechanical structure.

[0025] One end of the lower support block 18 is rotatably connected to a rotating wheel 19. The rotating wheel 19 replaces the contact between the lower support block 18 and the movable bushing 3, thereby reducing the wear between the lower support block 18 and the movable bushing 3.

[0026] It should be noted that, as Figure 1 and Figure 6 As shown, if the U-shaped frame 14 and the movable bushing 3 are hinged together, a locking group adapted to the movable bushing 3 can also be fixedly connected to the outside of the first fixed bushing 1, which is used to lock the position of the first fixed bushing 1 and the movable bushing 3, thereby improving the stability when the first fixed bushing 1 and the movable bushing 3 are connected.

[0027] The locking assembly includes a guide housing 20 and a limiting block 21. The guide housing 20 is fixedly connected to the outside of the first fixed bushing 1. A slider 22 is slidably connected inside the guide housing 20. A locking rod 23 is fixedly connected to the lower end of the slider 22. A through hole opposite to the locking rod 23 is opened on the lower side of the guide housing 20. The lower end of the locking rod 23 extends to the lower side of the guide housing 20 through the through hole. The limiting block 21 is fixedly connected to the outside of the movable bushing 3. A locking hole 24 adapted to the locking rod 23 is opened on the limiting block 21. The locking rod 23 can be inserted into the lock hole 24, thereby completing the connection and locking of the first fixed bushing 1 and the movable bushing 3.

[0028] In some embodiments, the upper side of the limiting block 21 is provided with a guide slope 25 located outside the lock hole 24, and the lower side of the locking rod 23 is a hemispherical structure. Thus, the hemispherical structure on the lower side of the locking rod 23 and the guide slope 25 can be used to guide the locking rod 23, so that the locking rod 23 and the lock hole 24 are accurately aligned.

[0029] A linear moving assembly that is connected to the guide housing 20 and is driven by the slider body 22 is also fixedly connected to the guide housing 20. The linear moving assembly can be an electric push rod or an electromagnetic moving mechanism. The electromagnetic moving mechanism includes an electromagnet 26 fixedly connected to the upper side of the guide housing 20. An iron plate 28 is fixedly connected to the upper side of the slider body 22. By activating the electromagnet 26, a pulling force can be applied to the iron plate 28, which will drive the slider body 22 to slide upward, so that the locking rod 23 moves out from the lock hole 24.

[0030] A return spring 27 can also be fixedly connected between the electromagnet 26 and the slider 22, so that a stable downward pushing force is applied to the slider 22 after the electromagnet 26 is de-energized.

[0031] The working principle of this invention is as follows: With the machine tool stopped, at least two PCD tool bodies 8 of different specifications are respectively snapped into the connecting sleeves 6 inside different movable bushings 3, and the screws 7 are tightened to lock the PCD tool bodies 8.

[0032] The machine tool drive mechanism drives the transmission shaft 2 to rotate continuously at a uniform speed, and drives the coupling component 4 to rotate synchronously; the rotating rod body 10 of the rotating bracket drives the central turntable 11 to rotate, and moves the movable bushing 3 loaded with the target PCD tool to directly below the driving coupling component 4. The first coupling part of the driving coupling component 4 is axially aligned with the second coupling part of the rotating shaft 5, forming magnetic coupling. The torque is transmitted to the lower PCD tool body 8 through the rotating shaft 5 to perform cutting.

[0033] After coupling is completed, the control electromagnet 26 is de-energized, the return spring 27 pushes the slider 22 downward, the locking rod 23 extends downward and slides into the locking hole 24 along the guide slope 25 of the limit block 21, mechanically locking the movable bushing 3, forming a mechanical limit. The magnetic coupling combined with the mechanical double limit improves the stability of high-speed machining.

[0034] When it is necessary to change to a different PCD tool, the CNC system energizes the electromagnet 26, which attracts the iron plate 28 and drives the slider 22 to move upward. The locking rod 23 disengages from the locking hole 24, releasing the mechanical lock. The rotating bracket drives the central turntable 11 to rotate, and the current coupling station moves horizontally away. The movable bushing 3 of another pre-installed PCD tool rotates to below the drive coupling component 4, and the magnetic field is recoupled, synchronously completing the mechanical lock. The transmission shaft 2 remains rotating throughout the process, without the need to stop the machine.

[0035] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A quick-change PCD tool clamping device, characterized in that: It includes a fixed drive unit and a movable rotary unit, wherein the number of the movable rotary units is at least two; The fixed drive unit includes a first fixed bushing (1), the inside of which is rotatably connected to a transmission shaft (2), the lower end of which is fixedly connected to a drive coupling member (4), and the lower side of the drive coupling member (4) is a first coupling part; The movable rotating unit includes a movable bushing (3), and a rotating shaft (5) is rotatably connected inside the movable bushing (3). A PCD tool body (8) is installed at the lower end of the rotating shaft (5). The upper side of the rotating shaft (5) is the second coupling part, and the first coupling part of the driving coupling member (4) can be magnetically coupled to the second coupling part of any rotating shaft (5).

2. The quick-change PCD tool clamping device according to claim 1, characterized in that: It also includes a rotating bracket, which includes a second fixed bushing (9), a rotating rod body (10) is rotatably connected inside the second fixed bushing (9), a central turntable (11) is fixedly connected to the lower end of the rotating rod body (10), at least two connecting arms are fixedly connected to the periphery of the central turntable (11), a U-shaped frame (14) is fixedly connected to one end of the connecting arm, and the movable bushing (3) is installed on the U-shaped frame (14).

3. The quick-change PCD tool clamping device according to claim 2, characterized in that: The U-shaped frame (14) is hinged to the movable bushing (3), and the rotating bracket also includes a rotation adjustment group adapted to the movable bushing (3).

4. The quick-change PCD tool clamping device according to claim 3, characterized in that: The connecting arm includes a guide sleeve (12) fixedly connected to the outside of the central turntable (11). All guide sleeves (12) are slidably connected to a slide bar (13). One end of the slide bar (13) is fixedly connected to the U-shaped frame (14). A guide rod (16) is fixedly connected to the slide bar (13). A guide groove (15) is provided on the guide sleeve (12). The guide groove (15) and the guide rod (16) are slidably connected. One end of the guide rod (16) extends through the guide groove (15) to the upper side of the guide sleeve (12). A guide rail (17) is also fixedly connected to the lower side of the second fixed bushing (9). The guide rod (16) and the guide rail (17) are slidably connected.

5. The quick-change PCD tool clamping device according to claim 4, characterized in that: The rotary adjustment assembly includes a lower support block (18) fixedly connected to the lower side of the guide sleeve (12).

6. The quick-change PCD tool clamping device according to claim 5, characterized in that: One end of the lower support block (18) is rotatably connected to a rotating wheel (19).

7. A quick-change PCD tool clamping device according to any one of claims 1-6, characterized in that: The first fixed bushing (1) is fixedly connected to a locking group that is compatible with the movable bushing (3). The locking group includes a guide housing (20) and a limiting block (21). The guide housing (20) is fixedly connected to the outside of the first fixed bushing (1). A slider (22) is slidably connected inside the guide housing (20). A locking rod (23) is fixedly connected to the lower end of the slider (22). A through hole opposite to the locking rod (23) is opened on the lower side of the guide housing (20). The lower end of the locking rod (23) extends to the lower side of the guide housing (20) through the through hole. The limiting block (21) is fixedly connected to the outside of the movable bushing (3). A lock hole (24) compatible with the locking rod (23) is opened on the limiting block (21). The locking rod (23) can be inserted into the lock hole (24). The guide housing (20) is also fixedly connected to a linear moving assembly that is connected to the slider (22) in a transmission manner.

8. A quick-change PCD tool clamping device according to claim 7, characterized in that: The upper side of the limiting block (21) is provided with a guide slope (25) located outside the lock hole (24), and the lower side of the locking rod (23) is a hemispherical structure.

9. A quick-change PCD tool clamping device according to claim 7, characterized in that: The linear movement assembly includes an electromagnet (26) fixedly connected to the upper side of the guide housing (20), an iron plate (28) fixedly connected to the upper side of the slider body (22), and a return spring (27) fixedly connected between the electromagnet (26) and the slider body (22).

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