Quick-change tool holder for CNC machining center

Abstract

This utility model relates to the field of machining center technology, specifically a quick-change tool chuck for CNC machining centers. It includes a spindle motor and a cutting tool. The spindle motor is mounted on the top of the spindle housing, and a Z-axis motor is fixedly connected to the back of the spindle housing. A motor is mounted on the top of the Z-axis motor, and a guide rail is mounted on the back of the Z-axis motor. The guide rail is mounted on the front of the column. This utility model significantly reduces tool runout and improves radial runout accuracy. The tapered hole design around the spindle port simplifies the mechanical structure and achieves synchronous positioning of the end face and the tapered surface, avoiding the gap problem of traditional tapers and reducing manufacturing costs. The built-in spring and pull stud assembly of the chuck can be disassembled separately, reducing maintenance costs. It overcomes the limitations of traditional chucks in terms of quick tool change, accuracy maintenance, and cost control, providing a better solution for efficient and precise machining in CNC machining centers.

Description

Technical Field

[0001] The utility model relates to the field of CNC machining equipment technology, specifically a quick-change tool chuck for CNC machining centers. Background Technology

[0002] Quick-change tool chucks for CNC machining centers are key components integrated into the machine tool spindle system. They are primarily used for the rapid and precise loading, unloading, and positioning of tools to meet the demands of frequent tool changes in automated machining. Their core function is to clamp and release the tool quickly and efficiently via a mechanical or hydraulic drive structure, while ensuring the tool's rigidity, accuracy, and stability during high-speed rotation and cutting.

[0003] However, traditional quick-change tool chucks, including spring chucks, use the radial contraction of an elastic sleeve to clamp the tool. They have a simple structure but weak rigidity. Hydraulic chucks use hydraulic oil pressure to drive a piston to generate a ring-shaped clamping force. They have higher precision but require a matching hydraulic system, which increases cost and maintenance complexity.

[0004] Based on this, the utility model provides a quick-change tool chuck for CNC machining centers to solve the aforementioned technical problems. Summary of the Invention

[0005] The purpose of this utility model is to provide a quick-change tool chuck for CNC machining centers, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the utility model provides the following technical solution: A quick-change tool chuck for CNC machining centers is provided, including a spindle box and a tool. A spindle motor is mounted on the top of the spindle box, and a Z-axis motor is fixedly connected to the back of the spindle box. A motor is mounted on the top of the Z-axis motor, and a guide rail is mounted on the back of the Z-axis motor. The guide rail is mounted on the front of the column.

[0007] Preferably, a chuck is fixedly installed on the top of the tool, and four symmetrical sliding grooves are made inside the chuck. A pull stud is slidably connected inside each sliding groove of the chuck, and a spring inside the chuck is sleeved on the outside of the end of the pull stud located inside the chuck.

[0008] Preferably, a slide control shaft is installed at the top of the column, a worktable is installed at the bottom of the column, and a worktable base is fixedly installed under the worktable.

[0009] Preferably, a spindle protective sleeve is fixedly installed at the top of the spindle motor, a spring pull rod is installed inside the spindle protective sleeve, a first spindle sleeve is fixedly installed at the bottom of the spindle box, and a second spindle sleeve is fixedly installed at the bottom of the first spindle sleeve.

[0010] Preferably, a spindle is installed inside the spindle box, an air cylinder is fixedly installed at the bottom of the spring rod, a spindle port is nested at the bottom of the spindle, and tapered holes are drilled around the spindle port.

[0011] Preferably, a disc tool magazine is installed on one side of the spindle box, and a plurality of tool head placement holes are evenly provided on the outer side of the disc tool magazine. A tool changer pull shaft is installed at the bottom of the disc tool magazine, and a tool changer support is rotatably connected to the bottom end of the tool changer pull shaft.

[0012] Compared with existing technologies, the advantages of this utility model are: This invention can significantly reduce tool runout and improve radial runout accuracy. The design of the tapered holes around the spindle port simplifies the mechanical structure and achieves synchronous positioning of the end face and the tapered surface, avoiding the gap problem of traditional tapers. At the same time, it reduces manufacturing costs. The built-in spring and pull stud assembly of the chuck can be disassembled separately without replacing the entire chuck, reducing maintenance costs. It significantly breaks through the limitations of traditional chucks in terms of quick tool change, accuracy maintenance, and cost control, providing a better solution for efficient and precise machining in CNC machining centers. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of a quick-change tool chuck for CNC machining centers is provided for utility model purposes. Figure 2 A cross-sectional structural diagram of a quick-change tool chuck for CNC machining centers is provided for utility model purposes. Figure 3 A side view of a quick-change tool chuck for CNC machining centers is provided for utility model purposes. Figure 4 This invention provides a schematic diagram of a quick-change tool chuck for CNC machining centers.

[0014] Figure 5 A top view of the tool head chuck for a quick-change tool chuck used in a CNC machining center is provided for utility model purposes.

[0015] Figure 6 A schematic diagram of the cross-sectional structure of the tool head latch of a quick-change tool holder for CNC machining centers is presented for utility model purposes.

[0016] Legend: 1. Spindle box; 2. Spindle motor; 3. Chuck with built-in spring; 4. Spindle sleeve No. 1; 5. Spindle sleeve No. 2; 6. Tool; 7. Column; 8. Worktable; 9. Spindle protective sleeve; 10. Spring pull rod; 11. Worktable base; 12. Disc tool magazine; 13. Tool head placement hole; 14. Tool changer arm pull shaft; 15. Tool changer arm support; 16. Pull pin; 17. Guide rail; 18. Motor; 19. Z-axis motor; 20. Slide rod control axis; 21. Spindle rod; 22. Air cylinder; 23. Spindle port; 24. Shaft taper hole; 25. Chuck. Detailed Implementation

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0018] Please see Figures 1 to 6 A quick-change tool chuck for CNC machining center includes a spindle box 1 and a tool 6. A spindle motor 2 is mounted on the top of the spindle box 1, and a z-axis motor 19 is fixedly connected to the back of the spindle box 1. A motor 18 is mounted on the top of the z-axis motor 19, and a guide rail 17 is mounted on the back of the z-axis motor 19. The guide rail 17 is mounted on the front of the column 7. Please see Figure 1 , Figure 3 When the tool 6 needs to work, the spindle motor 2, the Z-axis motor 19 and the motor 18 are started, which drive the spindle box 1 to operate. The required tool is selected in the tool head placement hole 13 and placed at both ends of the tool changer support 15. The tool changer pull shaft 14 moves upward, and the tool 6 is engaged with the spindle port 23. For different height requirements, it can slide to the required height on the guide rail 2 17 in front of the column 7.

[0019] It should also be noted that a collet 25 is fixedly installed on the top of the tool 6. The collet 25 has four symmetrical sliding grooves inside. Each sliding groove on the collet 25 is slidably connected to a pull stud 16. The end of the pull stud 16 located inside the collet 25 is fitted with a collet built-in spring 3. Please see Figure 1 , Figure 4 , Figure 5 and Figure 6 When the tool 6 is in normal use, the internal spring 3 of the collet 25 will be compressed due to the pressure inside the collet, forming an outward force. The pull pin 16, which is fixedly connected to the other end of the internal spring 3, will pop out to the maximum extent in the opposite direction to the corresponding slide opening inside the collet 25, and firmly engage with the tool holder.

[0020] It should also be noted that a slide control shaft 20 is installed on the top of the column 7, a worktable 8 is installed at the bottom of the column 7, and a worktable base 11 is fixedly installed under the worktable 8. Please see Figure 2 , Figure 3 When it is necessary to process items, the items can be placed on the workbench 8. If there is a requirement for width, the workbench 8 can be slid back and forth to meet the requirements, which greatly improves the precision required for the items.

[0021] It should also be noted that a spindle protective sleeve 9 is fixedly installed at the top of the spindle motor 2, a spring pull rod 10 is installed inside the spindle protective sleeve 9, a spindle sleeve No. 4 is fixedly installed at the bottom of the spindle box 1, and a spindle sleeve No. 2 5 is fixedly installed at the bottom of the spindle sleeve No. 4. Please see Figure 1 , Figure 2 When the machining center is working normally, the spindle motor 2 is started first. Under the drive of the spindle motor 2, the spindle rod 21, together with the spring pull rod 10, forms a downward force. The spindle sleeve 4 and spindle sleeve 5 connected to the spindle rod 21 also move downward together to connect with the tool 6. The automatic locking has high safety.

[0022] It should also be noted that a spindle rod 21 is installed inside the spindle box 1, an air cylinder 22 is fixedly installed at the bottom of the spring rod 10, a spindle port 23 is nested at the bottom of the spindle rod 21, and a shaft taper hole 24 is drilled around the spindle port 23.

[0023] Please refer to Figure 1. Figure 2 When tool 6 is needed to process an item, the spindle motor 2, Z-axis motor 19, and drive motor 18 first start operating. At this time, the spindle rod 21, driven by the spindle motor 2, generates a downward force. The air cylinder 22 compresses under the pressure of the spindle rod 21. Meanwhile, the tool changer arm support 15 exerts an upward force, and the spindle rod 21 presses down on the collet 25. The collet's built-in spring 3 receives an outward force, causing the pull pin 16 to pop outward and engage with the tapered holes 24 around the spindle port 23. As the air cylinder 22 controls the upward tightening, the tool changer arm support 15 rotates back to the lower end of the disc tool magazine 12. Tool 6 is clamped with the spindle port 23 for easy and quick tool change.

[0024] It should also be noted that a disc tool magazine 12 is installed on one side of the spindle box 1. Several tool head placement holes 13 are evenly provided on the outer side of the disc tool magazine 12. A tool change arm pull shaft 14 is installed at the bottom of the disc tool magazine 12. A tool change arm support 15 is rotatably connected to the bottom end of the tool change arm pull shaft 14. Please see Figure 1 , Figure 3If it is necessary to store the cutting tool, the cutting tool can be placed in the cutting tool placement hole 13. To change the cutting tool, simply take it out of the cutting tool placement hole 13 and place it at the clamping end of the cutting tool changing arm support 15. The cutting tool 6 will be installed in the appropriate position by rotating the cutting tool changing arm support 15. The storage is reasonable and the installation is convenient.

[0025] Detailed Implementation: In practical applications, when tool 6 needs to work, the spindle motor 2, Z-axis motor 19, and motor 18 are started, which drive the spindle box 1 to operate. The required tool is selected in the tool head placement hole 13 and placed at both ends of the tool changer support 15. The tool changer pull shaft 14 moves upward, and tool 6 engages with spindle port 23. For different height requirements, it can slide on guide rail 2 17 in front of column 7 to the required height. When tool 6 is in normal use, the internal spring 3 of the collet 25 is compressed due to the pressure, forming an outward force. The pull pin 16 fixedly connected to the other end of the internal spring 3 of the collet 25 will pop out to the maximum extent in the opposite direction to the corresponding sliding groove inside the collet 25, and firmly engage with the tool holder. When it is necessary to process an item, the item can be placed on the worktable 8. If there is a requirement for width, the worktable 8 can be slid back and forth to meet the requirements. The precision is greatly improved. When the machining center is working normally, the spindle motor 2 is started first. The spindle rod 21, driven by the spindle motor 2, forms a downward force together with the spring pull rod 10. The spindle sleeve 4 and spindle sleeve 5 connected to the spindle rod 21 also move downward together to connect with the tool 6. The automatic locking has high safety. When the tool 6 needs to process the workpiece, the spindle motor 2 and the Z-axis motor 19 are started first to drive the motor 18. At this time, the spindle rod 21 forms a downward force under the drive of the spindle motor 2. The air cylinder 22 will compress under the pressure of the spindle rod 21. At this time, the tool changer support 15 exerts an upward force. The spindle rod 21 presses the chuck 25 downward. The spring 3 inside the chuck is subjected to an outward force, which drives the pull pin 16 to pop out and engage with the shaft tapered hole 24 around the spindle port 23. As the air cylinder 22 controls the tightening upward, the tool changer support 15 rotates back to the lower end of the disc tool magazine 12. The tool 6 is clamped to the spindle port 23 for easy and quick replacement. If the tool needs to be stored, it can be placed in the tool head placement hole 13. To change the tool, simply take it out of the tool head placement hole 13 and place it at the clamping end of the tool changing arm support 15. The tool changing arm support 15 will rotate to install the tool 6 in the appropriate position. The storage is reasonable and the installation is convenient.

[0026] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A quick-change tool chuck for a CNC machining center, comprising a spindle box (1) and a tool (6), characterized in that, A spindle motor (2) is installed on the top of the spindle box (1), and a z-axis motor (19) is fixedly connected to the back of the spindle box (1). A motor (18) is installed on the top of the z-axis motor (19), and a guide rail (17) is installed on the back of the z-axis motor (19). The guide rail (17) is installed on the front of the column (7).

2. A quick-change tool chuck for CNC machining center according to claim 1, wherein a chuck (25) is fixedly installed on the top of the tool (6), and four sliding grooves are symmetrically opened inside the chuck (25). Each sliding groove on the chuck (25) is slidably connected with a pull stud (16), and a chuck-integrated spring (3) is sleeved on the outside of one end of the pull stud (16) located inside the chuck (25).

3. A quick-change tool chuck for a CNC machining center according to claim 2, characterized in that, The column (7) is equipped with a slide control shaft (20) at the top, and a workbench (8) is installed at the bottom of the column (7). A workbench base (11) is fixedly installed under the workbench (8).

4. A quick-change tool chuck for a CNC machining center according to claim 3, characterized in that, The top of the spindle motor (2) is fixedly installed with a spindle protective sleeve (9), and a spring pull rod (10) is installed inside the spindle protective sleeve (9). The bottom of the spindle box (1) is fixedly installed with a spindle sleeve No. 1 (4), and a spindle sleeve No. 2 (5) is fixedly installed at the bottom of the spindle sleeve No. 1 (4).

5. A quick-change tool chuck for a CNC machining center according to claim 4, characterized in that, The spindle box (1) is equipped with a spindle rod (21), and the bottom of the spring rod (10) is fixedly equipped with an air cylinder (22). The bottom of the spindle rod (21) is nested with a spindle port (23), and the spindle port (23) is drilled with shaft tapered holes (24) around its perimeter.

6. A quick-change tool chuck for a CNC machining center according to claim 5, characterized in that, A disc tool magazine (12) is installed on one side of the spindle box (1). A number of tool head placement holes (13) are evenly provided on the outer side of the disc tool magazine (12). A tool changer pull shaft (14) is installed at the bottom of the disc tool magazine (12). A tool changer support (15) is rotatably connected to the bottom end of the tool changer pull shaft (14).

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