An automatic tool changer for a CNC milling machine

Abstract

This utility model provides an automatic tool changer for CNC milling machines, belonging to the field of CNC milling machine tool changing technology. It includes a frame, a sliding module mounted on the frame, and a CNC module mounted on the sliding module. It also includes a tool changing component mounted on the CNC module, with a detachable tool head inside; a bracket mounted on the frame, with a moving component mounted on the bracket, and a rotating component mounted on the moving component. The rotating component assists the tool changing component in changing the tool head. This utility model features a moving component and a rotating component. A servo motor can quickly drive the moving and rotating components, and an electric push rod can quickly clamp and release the tool head, greatly shortening the tool changing time, improving machine tool production efficiency, eliminating the need for manual tool changing by operators, and simultaneously improving safety during the production process.

Description

Technical Field

[0001] This utility model relates to the field of CNC milling machine tool changing technology, and in particular to an automatic tool changing device for CNC milling machines. Background Technology

[0002] CNC milling machines, also known as Computer Numerical Control (CNC) milling machines, are milling machines controlled by electronic digital signals. They are automated machining equipment developed from general milling machines, sharing similar machining processes and structures. With the development of microelectronics and computer technology, the performance of CNC systems has become increasingly sophisticated, and the application fields of CNC technology are expanding daily.

[0003] During the milling process, drilling and milling operations are required to process the workpiece. Therefore, various different cutting tools are needed to process the end face of the workpiece. When the cutting tools need to be changed during the processing, the operator has to manually disassemble and replace them. The cutting end of the cutting tool can easily cut the operator, thereby reducing the operator's work efficiency, extending the processing cycle of the workpiece, and increasing the processing cost of the workpiece. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing an automatic tool changer for CNC milling machines. Through the coordinated structure of rotating components, moving components, and tool changing components, it solves the problem of the need for manual tool changing in existing technologies.

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

[0006] An automatic tool changer for a CNC milling machine includes a frame, a sliding module mounted on the frame, a CNC module mounted on the sliding module, and a tool changing component mounted on the CNC module, wherein a tool head is detachably disposed within the tool changing component; a bracket mounted on the frame, a moving component mounted on the bracket, and a rotating component mounted on the moving component, the rotating component assisting the tool changing component in changing the tool head.

[0007] Preferably, the moving component includes a limiting frame mounted on a bracket, a servo motor is mounted on the outside of the limiting frame, the output end of the servo motor is fixedly connected to a lead screw through the limiting frame, and the end of the lead screw away from the servo motor is rotatably connected to the inner wall of the limiting frame.

[0008] Preferably, the lead screw is externally threaded with a slider, the bottom of the slider is slidably connected to the inner wall of the limiting frame, the limiting frame is provided with a through groove, and the slider is fixedly connected to a special-shaped frame through the through groove.

[0009] Preferably, the rotating component includes a rotary motor mounted on a shaped frame, a fixed plate mounted on the shaped frame, and a disc fixedly connected to the output end of the rotary motor through the fixed plate via a coupling. An arc-shaped disc is provided above the disc, and a guide rod is provided on one side of the arc-shaped disc.

[0010] Preferably, a shaped disk is rotatably connected above the fixed plate, and the surface of the shaped disk is uniformly provided with arc-shaped grooves corresponding to the arc-shaped disk, and guide grooves corresponding to the guide rods are uniformly provided between the multiple arc-shaped grooves.

[0011] Preferably, a rotating seat is fixedly connected to the top of the irregularly shaped disk, and clamping frames are evenly installed on the outside of the rotating seat, the clamping frames being used to clamp the cutting head.

[0012] Preferably, the tool changing component includes a cladding fixedly installed at the bottom of the CNC module. The cladding has a cladding groove inside, and electric push rods are symmetrically installed inside the cladding groove. The output end of the electric push rod is fixedly connected to a clamp, and the clamp has an anti-slip pad inside. The clamp is used to fix the tool head.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention features a moving component and a rotating component. When tool replacement is required, the moving component drives the rotating component closer to the CNC module. Simultaneously, the rotating component moves the clamping frame below the CNC module, placing the old tool head inside the clamping frame. Then, the rotating component clamps and replaces the new tool head, thus achieving automated tool changing. The servo motor can quickly drive the moving and rotating components, and the electric push rod can quickly clamp and release the tool head, greatly shortening the tool changing time, improving the machine tool's production efficiency, eliminating the need for manual tool changing by operators, and improving safety during the production process. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a side view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the moving component of this utility model;

[0019] Figure 4 This is a schematic diagram of the rotating component structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the tool changing component of this utility model;

[0021] Figure 6 for Figure 4 Enlarged schematic diagram of the structure of region A in the middle;

[0022] Drawing number descriptions: 1. Frame; 2. Sliding module; 3. CNC module; 4. Support; 5. Moving part; 6. Rotating part; 7. Tool changing part; 8. Servo motor; 9. Limit frame; 10. Lead screw; 11. Slider; 12. Irregular frame; 13. Rotary motor; 14. Fixing plate; 15. Disc; 16. Arc disc; 17. Guide rod; 18. Irregular disc; 19. Arc groove; 20. Guide groove; 21. Rotating seat; 22. Clamping frame; 23. Tool head; 24. Card seat; 25. Card slot; 26. Electric push rod; 27. Jacket; 28. Anti-slip pad; 29. ​​Through groove. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0025] Example 1: Please refer to Figure 1 - Figure 6 An automatic tool changer for a CNC milling machine includes a frame 1, a sliding module 2 mounted on the frame 1, and a CNC module 3 mounted on the sliding module 2. Both the sliding module 2 and the CNC module 3 are existing technologies. The device also includes: a tool changing component 7 mounted on the CNC module 3, with a detachable tool head 23 inside the tool changing component 7; and a bracket 4 mounted on the frame 1, with a moving component 5 mounted on the bracket 4 and a rotating component 6 mounted on the moving component 5. The rotating component 6 assists the tool changing component 7 in changing the tool head 23.

[0026] For further details, please refer to Figure 5The moving part 5 includes a limiting frame 9 mounted on the bracket 4. The limiting frame 9 is made of high-strength aluminum alloy, which is lightweight, high-strength, and corrosion-resistant, effectively reducing the overall weight of the device. A servo motor 8 is mounted on the outside of the limiting frame 9. The servo motor 8 provides a power source for the moving part 5, ensuring stable power output and accurate positioning. The output end of the servo motor 8 passes through the limiting frame 9 and is fixedly connected to a lead screw 10. The end of the lead screw 10 away from the servo motor 8 is rotatably connected to the inner wall of the limiting frame 9.

[0027] Furthermore, the lead screw 10 is externally threaded to a slider 11. The slider 11 is a linear ball slider with multiple rows of high-precision balls installed inside. It cooperates with the linear guide rail on the inner wall of the limit frame 9 to achieve smooth and stable sliding. The bottom of the slider 11 is also equipped with a self-lubricating device to reduce the frequency of maintenance. The bottom of the slider 11 is slidably connected to the inner wall of the limit frame 9. The limit frame 9 has a through groove 29 on its outside. The slider 11 is fixedly connected to a special-shaped frame 12 through the through groove 29. The special-shaped frame 12 is forged from alloy steel and has been precision machined and heat-treated. It has good rigidity and toughness and can withstand a large load.

[0028] For details, please refer to Figure 4 and Figure 6 The rotating component 6 includes a rotary motor 13 mounted on the irregular frame 12. The rotary motor 13 is a high-performance servo motor with fast response and high speed capability, which can achieve precise angle control. A fixing plate 14 is mounted on the irregular frame 12. The output end of the rotary motor 13 is fixedly connected to a disc 15 through the fixing plate 14 via a coupling. An arc-shaped disc 16 is provided above the disc 15. Both the disc 15 and the arc-shaped disc 16 are made of stainless steel and have a mirror-polished surface. A guide rod 17 is provided on one side of the arc-shaped disc 16. The guide rod 17 is made of hard alloy material, which has high hardness and good wear resistance, ensuring that it is not easily worn during frequent rotation.

[0029] Specifically, a shaped disk 18 is rotatably connected above the fixed plate 14. The shaped disk 18 is made of high-strength engineering plastic, which is lightweight and has good insulation and corrosion resistance. The surface of the shaped disk 18 is evenly provided with arc-shaped grooves 19 corresponding to the arc-shaped disk 16. Guide grooves 20 corresponding to the guide rod 17 are evenly provided between the multiple arc-shaped grooves 19. When the rotary motor 13 drives the disk 15 to rotate, it synchronously drives the arc-shaped disk 16 and the guide rod 17 to rotate synchronously, and then drives the shaped disk 18 to rotate intermittently through the arc-shaped disk 16 and the guide rod 17.

[0030] Example 2: Based on Example 1, according to Figure 4 - Figure 6As shown, it is worth noting that a rotating base 21 is fixedly connected to the top of the irregularly shaped disk 18. The rotating base 21 is made of high-quality carbon steel and has undergone heat treatment, giving it high strength and toughness. Clamping frames 22 are evenly installed on the outside of the rotating base 21. The clamping frames 22 are used to clamp the cutter head 23. The clamping frames 22 are made of spring steel and have anti-slip rubber pads inside, which can firmly clamp the cutter head 23, preventing it from falling off during cutter changes, extending the service life of the device, and reducing equipment maintenance costs and replacement frequency.

[0031] The tool changing component 7 includes a chuck 24 fixedly installed at the bottom of the CNC module 3. The chuck 24 is made of high-quality cast iron and has undergone aging treatment to eliminate internal stress, giving it good rigidity and stability, and enabling it to withstand the impact force during tool changing. The chuck 24 has a slot 25 inside, and electric push rods 26 are symmetrically installed inside the slot 25. The electric push rods 26 are high-precision electric push rods with a stroke control accuracy of ±0.01mm, enabling rapid and stable extension and retraction. A clamp is fixedly connected to the output end of the electric push rod 26. 27. The collet 27 is made of high-strength alloy steel. The collet 27 has an anti-slip pad 28 inside. The anti-slip pad 28 is made of nitrile rubber, which has good wear resistance and anti-slip performance. It can effectively increase the friction between the collet 27 and the cutter head 23, ensuring that the cutter head 23 is firmly fixed. The collet 27 is used to fix the cutter head 23. The servo motor 8 can quickly drive the moving part 5 and the rotating part 6 to move. The electric push rod 26 can quickly complete the clamping and loosening of the cutter head 23, which greatly shortens the tool changing time and improves the production efficiency of the machine tool.

[0032] The working principle of this solution is as follows:

[0033] When the CNC milling machine needs to change the cutter head 23, firstly, the servo motor 8 starts, driving the lead screw 10 to rotate. The lead screw 10 drives the slider 11 to slide along the linear guide rail within the limit frame 9 through thread transmission, thereby driving the irregular frame 12 to move to the designated position.

[0034] Next, the rotary motor 13 starts and drives the disc 15 to rotate through the coupling. The disc 15 synchronously drives the arc-shaped disc 16 and the guide rod 17 to rotate. When the guide rod 17 slides into the guide groove 20 on the surface of the irregular disc 18, it drives the irregular disc 18 to rotate at a certain angle, so that the tool head 23 held by the clamping frame 22 rotates to the position corresponding to the tool changing component 7.

[0035] At this time, the electric push rod 26 in the tool changing component 7 extends, and the collet 27 opens under the push of the electric push rod 26, releasing the old tool head 23. Then, the moving component 5 continues to operate, moving the new tool head 23 on the irregular frame 12 to below the tool changing component 7, the electric push rod 26 retracts, and the collet 27 clamps the new tool head 23.

[0036] Finally, the moving part 5 and the rotating part 6 are reset, completing one tool change process.

[0037] The servo motor 8, rotary motor 13, and electric linear actuator 26 can all be purchased commercially. The servo motor 8, rotary motor 13, and electric linear actuator 26 are all equipped with power supplies. These are mature technologies in the field and have been fully disclosed, so they will not be repeated in the specification.

[0038] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. An automatic tool changer for a CNC milling machine, comprising a frame (1), a sliding module (2) mounted on the frame (1), and a CNC module (3) mounted on the sliding module (2). characterized in that Also includes: A tool changing component (7) is installed on the CNC module (3), and a tool head (23) is detachably provided inside the tool changing component (7). A bracket (4) is mounted on the frame (1), a moving part (5) is mounted on the bracket (4), and a rotating part (6) is mounted on the moving part (5). The rotating part (6) is used to assist the tool changing part (7) in changing the tool head (23).

2. The automatic tool changer for a CNC milling machine according to claim 1, wherein, The moving part (5) includes a limiting frame (9) mounted on a bracket (4). A servo motor (8) is mounted on the outside of the limiting frame (9). The output end of the servo motor (8) is fixedly connected to a lead screw (10) through the limiting frame (9). The end of the lead screw (10) away from the servo motor (8) is rotatably connected to the inner wall of the limiting frame (9).

3. The automatic tool changer for a CNC milling machine according to claim 2, characterized in that, The lead screw (10) is connected to a slider (11) by an external thread. The bottom of the slider (11) is slidably connected to the inner wall of the limiting frame (9). The limiting frame (9) has a through groove (29) on its outside. The slider (11) is fixedly connected to a special-shaped frame (12) through the through groove (29).

4. The automatic tool changer for a CNC milling machine according to claim 3, characterized in that, The rotating component (6) includes a rotary motor (13) mounted on a shaped frame (12). A fixed plate (14) is mounted on the shaped frame (12). The output end of the rotary motor (13) is fixedly connected to a disc (15) through the fixed plate (14) via a coupling. An arc-shaped disc (16) is provided above the disc (15). A guide rod (17) is provided on one side of the arc-shaped disc (16).

5. The automatic tool changer for a CNC milling machine according to claim 4, characterized in that, A shaped disk (18) is rotatably connected above the fixed plate (14). The surface of the shaped disk (18) is evenly provided with arc grooves (19) corresponding to the arc disk (16), and guide grooves (20) corresponding to the guide rod (17) are evenly provided between the multiple arc grooves (19).

6. The automatic tool changer for a CNC milling machine according to claim 5, characterized in that, The top of the irregular disc (18) is fixedly connected to a rotating seat (21), and a clamping frame (22) is evenly installed on the outside of the rotating seat (21). The clamping frame (22) is used to clamp the cutter head (23).

7. The automatic tool changer for a CNC milling machine according to claim 1, characterized in that, The tool changing component (7) includes a card holder (24) fixedly installed at the bottom of the CNC module (3). The card holder (24) has a card slot (25) inside. Electric push rods (26) are symmetrically installed inside the card slot (25). A sleeve (27) is fixedly connected to the output end of the electric push rod (26). An anti-slip pad (28) is provided inside the sleeve (27). The sleeve (27) is used to fix the tool head (23).

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