Tool changing assembly based on engraving and milling machine

Abstract

The utility model relates to the technical field of tool changing assemblies, in particular to a tool changing assembly based on an engraving and milling machine, which comprises a guide rail pair guide rail, at least two groups of guide rail pair sliding seats are mounted on the surface of the guide rail pair guide rail in a sliding manner, a first air cylinder is mounted above the guide rail pair sliding seats, and a first piston rod for stretching is arranged in the first air cylinder. A first base is fixedly installed at the end of the first piston rod and is of a U-shaped structure. According to the scheme, through the synergistic effect of the guide rail pair sliding seats and the first air cylinder, height and position adjustment of the tool bit is achieved, it is ensured that the tool bit can be accurately conveyed to the tool bit position of the engraving and milling machine, one guide rail pair sliding seat is used for taking down an old tool bit, the other guide rail pair sliding seat is used for installing a new tool bit, and the tool changing efficiency is remarkably improved; and through cooperation of a servo motor and a position sensor, the accuracy and stability of front-back inclination angle adjustment of the tool bit are further guaranteed, manual intervention is reduced, and the automation degree is improved.

Description

Technical Field

[0001] This utility model relates to the field of tool changing components, and in particular to a tool changing component based on a precision engraving machine. Background Technology

[0002] A precision engraving machine, also known as a CNC engraving machine, is a high-precision machine tool widely used for the fine processing of various materials. It is mainly used for engraving, cutting, drilling, milling, and other operations, and is suitable for various fields such as woodworking, metal processing, plastic processing, stone processing, advertising production, and mold making.

[0003] In the machining process of a CNC engraving machine, tool replacement is an unavoidable step. According to the authorization announcement number "CN222755032U", a tool setting assembly based on a CNC engraving machine is disclosed, including a mounting plate. A mounting chamber is fixedly connected to the top of the mounting plate, and a threaded cylinder is movably sleeved on the rear side of the mounting chamber. A threaded rod engages within the inner cavity of the threaded cylinder. A movable protective frame is fixedly connected to the top of the threaded rod, and a support rod is fixedly connected to the bottom of the movable protective frame. Support cylinders are fixedly connected to both sides of the mounting plate. Through the engagement of the threaded cylinder and the threaded rod, the threaded rod moves along the axis of the support rod and the threaded cylinder, thereby changing the position of the movable protective frame. This allows the position of the movable protective frame to be changed after replacing different models of the tool setting assembly or adjusting the distance between the tool and the tool setting assembly, improving the versatility of the movable protective frame and enabling it to provide comprehensive protection for the tool setting assembly in different scenarios.

[0004] Currently, when the cutting head of a CNC engraving machine needs to be replaced after a certain period of use or when the engraved text requires a corresponding cutting head replacement, the cutting head of the CNC engraving machine needs to be reinstalled and disassembled stably. In some production environments, this is done manually by workers. When manually changing tools, operators need to directly contact the high-speed rotating spindle and the sharp cutting tool, which poses certain safety hazards. If not handled carefully, it may lead to accidental injury. Frequent manual tool changes increase the labor intensity of operators, especially under long working hours, which can easily lead to fatigue and operational errors. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a tool changing component based on a precision engraving machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a tool changing assembly based on a precision engraving machine, including a guide rail sub-guide rail, at least two sets of guide rail sub-slide seats are slidably installed on the surface of the guide rail sub-guide rail, a cylinder is mounted on the top of the guide rail sub-slide seats, a piston rod for extension and retraction is provided inside the cylinder, and a base is fixedly installed at the end of the piston rod, the base being a U-shaped structure;

[0007] Both sides of the base are provided with bushings, and a shaft is installed inside the bushing. A support sleeve is fixedly sleeved at the middle of the shaft, and a connecting plate is fixedly installed on the upper end of the outer ring wall of the support sleeve.

[0008] One end of the shaft is provided with a motor. The outer ring wall of the motor is fixedly installed on the surface of the base through a bracket. The motor is provided with a drive shaft. The end of the drive shaft is fixedly connected to the end face of the shaft through a coupling.

[0009] An extension plate is fixedly installed on the end face of the guide rail slide, and a position sensor is mounted on the upper end of the extension plate.

[0010] In detail, a base two is erected on the upper end of the connecting plate, and positioning plates are symmetrically fixed on both sides of the lower end of the base two. The positioning plates are tightly attached to the connecting plate, and the connection position of the two is fixed by screws.

[0011] In detail, bushings 2 are fixed through both sides of the connecting plate, and shafts 2 are rotatably installed inside the bushings 2 distributed along both sides.

[0012] In detail, a motor is provided at one end of the shaft two, the outer wall of the motor two is fixed to the surface of the base two through a bracket, and a rotating shaft two for driving is provided inside the motor two. The end of the rotating shaft two is fixedly connected to the end face of the shaft two through a coupling.

[0013] In detail, a support sleeve is fixedly sleeved on the surface of the shaft two, and a connecting rod is fixed on the outer ring wall of the support sleeve two.

[0014] In detail, the upper end of the connecting rod is slidably sleeved with a rod sleeve, and a disc is fixedly installed on the upper end of the rod sleeve. Several side plates are distributed on the upper end of the disc.

[0015] In detail, a cylinder 2 is installed through the inside of the side plate. The outer wall of the cylinder 2 is fixed to the surface of the side plate by a bracket. A piston rod 2 for extension and retraction is installed inside the cylinder 2. A clamp is fixed to the end of the piston rod 2.

[0016] In detail, the connecting rod has a pin groove inside, and a locking pin is slidably sleeved inside the pin groove. The end of the locking pin has a curved structure, and a spring is installed inside the pin groove. The two ends of the spring are fixedly installed to the inner wall of the pin groove and the surface of the locking pin, respectively.

[0017] In detail, the inner wall of the sleeve is provided with an arc-shaped groove, the inner wall surface of the arc-shaped groove is an arc surface structure, and the end curved surface of the locking pin is slidably abutted against the inner arc surface of the arc-shaped groove.

[0018] The design scheme proposed in this utility model has the following beneficial effects in application:

[0019] 1. This solution achieves the adjustment of the height and position of the cutter head through the coordinated action of the guide rail slide and cylinder one, ensuring that the cutter head can be accurately delivered to the cutter head position of the engraving machine. The design of two sets of guide rail slides allows one to be used to remove the old cutter head and the other to install the new cutter head, which significantly improves the tool changing efficiency. The cooperation of the servo motor and position sensor further ensures the accuracy and stability of the cutter head tilt angle adjustment, reduces manual intervention, and improves the degree of automation.

[0020] 2. As described in 1, through the linkage design of shaft one, shaft two, and support sleeve, this component can flexibly adjust the front-back and left-right tilt angles during the tool head replacement process to adapt to different processing requirements. Motor two drives shaft two to rotate, which drives support sleeve two and connecting rod to adjust the left-right tilt angle of the tool head. The cooperation between cylinder two and clamp ensures the stability of tool head clamping. This multi-degree-of-freedom adjustment capability enables the tool changing component to adapt to various tool head specifications and complex processing scenarios, enhancing the versatility of the equipment.

[0021] 3. As described in 2, the sleeve and connecting rod adopt a quick-connect structure of pin and spring, which allows the disc and clamping parts to be quickly replaced according to the specifications of the cutter head. The curved groove and the curved surface of the pin ensure the stability of the connection and simplify the disassembly process. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a front structural diagram of base one and base two of this utility model;

[0024] Figure 3 This is a top view of the cylinder 2 and the clamping seat of this utility model;

[0025] Figure 4 This is a disassembly diagram of the locking pin, spring, and pin groove of this utility model;

[0026] Figure 5 This is a schematic diagram showing the position of the arc-shaped groove of this utility model on the rod sleeve.

[0027] In the diagram: 1. Guide rail pair; 11. Guide rail pair slide; 12. Cylinder 1; 13. Base 1; 14. Bushing 1; 15. Shaft 1; 16. Support sleeve 1; 17. Motor 1; 18. Connecting plate; 19. Extension plate; 110. Position sensor; 2. Base 2; 21. Positioning plate; 22. Bushing 2; 23. Shaft 2; 24. Motor 2; 25. Support sleeve 2; 26. Connecting rod; 3. Rod sleeve; 30. Disc; 31. Side plate; 32. Cylinder 2; 33. Clamp; 3001. Pin groove; 3002. Locking pin; 3003. Spring; 3004. Arc groove. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Example 1

[0030] Reference Figures 1-5 A tool changing assembly based on a CNC engraving machine includes a guide rail sub-rail 1. At least two sets of guide rail sub-slide seats 11 are slidably mounted on the surface of the guide rail sub-rail 1. A cylinder 12 is mounted above the guide rail sub-slide seats 11. The cylinder 12 contains a piston rod for extension and retraction. A base 13 with a U-shaped structure is fixedly mounted at the end of the piston rod. The movement of the tool changing component is ensured by the sliding of the guide rail sub-slide seats 11 on the guide rail sub-rail 1. At least two sets of these components are provided. One method involves removing the cutter head that needs to be replaced, while the other method involves installing a new cutter head. This solution is based on a CNC engraving machine, whose cutter head position has the ability to automatically lock or release the cutter head after insertion. This includes electric chucks, pneumatic chucks, and hydraulic chucks, which are existing technologies and are not described in detail in the attached drawings. The main purpose of this solution is to accurately align the cutter head with the cutter head position of the CNC engraving machine. Cylinder 12 can replace the cutter head and can adjust the height of the cutter head during the conveying process.

[0031] Both sides of the base 13 are provided with bushings 14. The bushings 14 rotate and are connected to a shaft 15. A support sleeve 16 is fixedly sleeved in the middle of the shaft 15. A connecting plate 18 is fixedly installed on the upper end of the outer ring wall of the support sleeve 16. The support sleeve 16 can be linked by the shaft 15 rotating based on the bushings 14. When the cutter head is replaced, the tilt angle of the front and rear positions can be adjusted.

[0032] A motor 17 is installed at one end of the shaft 15. The outer ring wall of the motor 17 is fixedly mounted to the surface of the base 13 via a bracket. The motor 17 has a drive shaft inside. The end of the drive shaft is fixedly connected to the end face of the shaft 15 via a coupling. The motor 17 is a servo motor. When the shaft 15 rotates, the rotation parameters can be set by PLC programming, thereby ensuring the stability of the angle adjustment of the cutter head before and after feeding.

[0033] An extension plate 19 is fixedly mounted on the end face of the guide rail slide 11. A position sensor 110 is mounted on the upper end of the extension plate 19. The position sensor 110 is a magnetic sensor that can provide position feedback. The magnetic position calibration sensor uses the change of magnetic field to detect the position of an object. Common types include Hall effect sensors and magnetoresistive sensors. When a magnetic object approaches the sensor, the change of magnetic field will cause the sensor output signal to change, thereby determining the position of the object.

[0034] It should be further explained that a base 2 is erected on the upper end of the connecting plate 18, and a positioning plate 21 is symmetrically fixed on both sides of the lower end of the base 2. The positioning plate 21 is tightly attached to the connecting plate 18, and the connection position of the two is fixed by screws. The installation of the positioning plate 21 and the connecting plate 18 can ensure the stable connection between the base 2 and the base 13.

[0035] It should be further explained that bushings 22 are fixed through both sides of the connecting plate 18. The bushings 22 distributed along both sides are rotatable and have shafts 23 installed through them. The stable linkage of the support sleeve 25 can be achieved by the shafts 23 rotating based on the bushings 22.

[0036] It should be further noted that a motor 24 is provided at one end of shaft 23. The outer wall of motor 24 is fixed to the surface of base 22 by a bracket. A rotating shaft 2 for driving is provided inside motor 24. The end of rotating shaft 2 is fixedly connected to the end face of shaft 23 by a coupling. Motor 24 is also a servo motor, and its operation process is the same as that of motor 17.

[0037] It should be further explained that a support sleeve 25 is fixedly sleeved on the surface of shaft 23, and a connecting rod 26 is fixed on the outer ring wall of the support sleeve 25. The rotation of the support sleeve 25 can adjust the tilt angle of the left and right positions when the cutter head is docked, and the connecting rod 26 can play a transitional connection role.

[0038] It should be further explained that the upper end of the connecting rod 26 is slidably sleeved with a rod sleeve 3, and the upper end of the rod sleeve 3 is fixedly installed with a disc 30. Several side plates 31 are distributed on the upper end of the disc 30. The multiple positions of the side plates 31 allow the clamps of the cutting head to be distributed in multiple positions during installation, which can ensure the stable gripping of the cutting head during installation or disassembly.

[0039] It should be further explained that a second cylinder 32 is installed through the inside of the side plate 31. The outer wall of the second cylinder 32 is fixed to the surface of the side plate 31 by a bracket. The second cylinder 32 is equipped with a second piston rod for extension and retraction. The end of the second piston rod is fixed with a clamp 33. By extending and retracting the second piston rod of the second cylinder 32, the clamp 33 can be moved back and forth. By attaching the clamps 33 at multiple positions to the cutter head to be clamped, the position of the cutter head can be stabilized during operation.

[0040] It should be further explained that the connecting rod 26 has a pin groove 3001 inside, and a retaining pin 3002 is slidably sleeved inside the pin groove 3001. The end of the retaining pin 3002 has a curved surface structure. A spring 3003 is installed inside the pin groove 3001. The two ends of the spring 3003 are fixedly installed to the inner wall of the pin groove 3001 and the surface of the retaining pin 3002, respectively. Due to the different specifications and shapes of the cutting head, the distribution of the second cylinder 32 used for clamping and the shape of the clamping seat 33 are non-standard parts, which need to be replaced according to the actual size of the cutting head and the required clamping points. The spring 3003 can ensure the stable extension and resetting of the retaining pin 3002.

[0041] It should be further explained that an arc-shaped groove 3004 is provided on the inner wall of the sleeve 3. The inner wall surface of the arc-shaped groove 3004 is an arc surface structure. The end curved surface of the locking pin 3002 slides and abuts against the inner arc surface of the arc-shaped groove 3004. When the disc 30 needs to be installed, the disc 30 is inserted and connected to the connecting rod 26 through the sleeve 3. At this time, the end face of the sleeve 3 will press against the end curved surface of the locking pin 3002, causing the locking pin 3002 to compress the spring 3003 into the pin groove 3001. Internally, after the sleeve 3 is fully engaged with the connecting rod 26, the spring 3003 resets the locking pin 3002, causing it to spring in and press into the arc groove 3004, thus stabilizing the engagement between the sleeve 3 and the connecting rod 26. During disassembly, external force pulls the locking pin 3002, causing the end curved surface to press against the inner arc surface of the arc groove 3004, which in turn compresses the spring 3003 and pushes it into the pin groove 3001, thus separating the sleeve 3 from the connecting rod 26.

[0042] In practice

[0043] This solution primarily focuses on precisely delivering the cutting head to the cutting head locking position on the CNC engraving machine. First, the guide rail slide 11 slides on the guide rail 1, driving the cylinder 12 and base 13 to move, ensuring the horizontal position adjustment during cutting head replacement. The piston rod of cylinder 12 can extend and retract to adjust the height of the cutting head, aligning it with the cutting head mounting position on the CNC engraving machine. Simultaneously, motor 17 drives shaft 15 to rotate, which in turn drives connecting plate 18 to adjust its tilt angle via support sleeve 16, ensuring that the angle of the cutting head matches the cutting head mounting position on the CNC engraving machine during delivery. Position sensor 110 monitors the slide position in real time to ensure movement accuracy. This multi-axis collaborative system, combining horizontal movement, height adjustment, and angle adjustment with PLC programming control, achieves precise positioning and delivery of the cutting head.

[0044] During the replacement process, the cutter head needs to be adjusted in multiple degrees of freedom to ensure precise alignment with the cutter head mounting position of the engraving machine. The base 2 is linked to the motor 24 via the shaft 23. The support sleeve 25 drives the connecting rod 26 to swing left and right, adjusting the horizontal deflection angle of the cutter head. At the same time, the clamping mechanism cylinder 32 and clamp 33 on the disc 30 can adapt to different specifications of cutter heads and ensure stability through multi-point clamping. The sleeve 3 and the connecting rod 26 adopt an elastic locking structure of the pin 3002 and the spring 3003, which allows for quick replacement of the fixtures that are compatible with different cutter heads. The arc groove 3004 and the curved surface of the pin ensure convenient disassembly and assembly and reliable locking. This system achieves precise angle adjustment of the cutter head in three-dimensional space through the coordinated action of the motor, cylinder and mechanical structure, meeting the needs of complex tool changing.

[0045] The sleeve 3 and the connecting rod 26 are connected by an elastic locking pin mechanism. During installation, the locking pin 3002 is compressed back by the inner wall of the sleeve. After the arc groove 3004 is aligned, the spring 3003 pops it out and locks it. During disassembly, the external force pulls the locking pin back, realizing rapid separation. The side plate 31 on the disc 30 can be equipped with cylinders 32 and clamps 33 of different specifications. The tool head is ensured to be stable by multi-point pneumatic clamping. The position sensor 110 provides real-time feedback on the slide position. Combined with the PLC control of the motor and cylinder action, the automated tool changing process is realized. This design takes into account both rigidity and flexibility, which can ensure the tool changing accuracy and adapt to diverse processing needs.

[0046] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A tool changing assembly based on a CNC engraving machine, comprising a guide rail sub-rail (1), characterized in that: At least two sets of guide rail slide blocks (11) are slidably installed on the surface of the guide rail (1). A cylinder (12) is mounted on the top of the guide rail slide block (11). A piston rod for extension and retraction is provided inside the cylinder (12). A base (13) is fixedly installed at the end of the piston rod. The base (13) has a U-shaped structure. Both sides of the base (13) are provided with bushings (14), and the bushings (14) are rotated and installed with shafts (15). A support sleeve (16) is fixedly sleeved at the middle position of the shaft (15), and a connecting plate (18) is fixedly installed on the upper end of the outer ring wall of the support sleeve (16). One end of the shaft (15) is provided with a motor (17). The outer ring wall of the motor (17) is fixedly installed on the surface of the base (13) by a bracket. The motor (17) is provided with a rotating shaft for driving inside. The end of the rotating shaft is fixedly connected to the end face of the shaft (15) by a coupling. An extension plate (19) is fixedly installed on the end face of the guide rail slide (11), and a position sensor (110) is mounted on the upper end of the extension plate (19).

2. The tool changing assembly based on a precision engraving machine according to claim 1, characterized in that: The upper end of the connecting plate (18) is supported by a base two (2), and the lower end of the base two (2) is symmetrically fixed with positioning plates (21) on both sides. The positioning plates (21) and the connecting plate (18) are closely attached to each other, and the connection position of the two is fixed by screws.

3. The tool changing assembly based on a precision engraving machine according to claim 2, characterized in that: Both sides of the connecting plate (18) are fixed with bushings (22), and the bushings (22) distributed on both sides are rotated and have shafts (23) installed inside.

4. The tool changing assembly based on a precision engraving machine according to claim 3, characterized in that: One end of the shaft two (23) is provided with a motor two (24). The outer wall of the motor two (24) is fixed to the surface of the base two (2) by a bracket. The motor two (24) is provided with a rotating shaft two for driving. The end of the rotating shaft two is fixedly connected to the end face of the shaft two (23) by a coupling.

5. A tool changing assembly based on a precision engraving machine according to claim 4, characterized in that: The surface of the shaft two (23) is fixedly sleeved with the support sleeve two (25), and the outer ring wall of the support sleeve two (25) is fixed with the connecting rod (26).

6. A tool changing assembly based on a precision engraving machine according to claim 5, characterized in that: The upper end of the connecting rod (26) is slidably sleeved with a rod sleeve (3), and a disc (30) is fixedly installed on the upper end of the rod sleeve (3). Several side plates (31) are distributed on the upper end of the disc (30).

7. A tool changing assembly based on a precision engraving machine according to claim 6, characterized in that: A cylinder 2 (32) is installed inside the side plate (31). The outer wall of the cylinder 2 (32) is fixed to the surface of the side plate (31) by a bracket. A piston rod 2 for extension and retraction is installed inside the cylinder 2 (32). A clamp (33) is fixed to the end of the piston rod 2.

8. A tool changing assembly based on a precision engraving machine according to claim 7, characterized in that: The connecting rod (26) has a pin groove (3001) inside, and a locking pin (3002) is slidably sleeved inside the pin groove (3001). The end of the locking pin (3002) is a curved structure. A spring (3003) is provided inside the pin groove (3001). The two ends of the spring (3003) are fixedly installed to the inner wall of the pin groove (3001) and the surface of the locking pin (3002), respectively.

9. A tool changing assembly based on a precision engraving machine according to claim 8, characterized in that: The inner wall of the sleeve (3) is provided with an arc groove (3004), the inner wall surface of the arc groove (3004) is an arc surface structure, and the end curved surface of the locking pin (3002) slides and abuts against the inner arc surface of the arc groove (3004).

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