Modular direct-drive numerical control milling head quick-change interface device

Abstract

The utility model relates to numerical control milling head technical field, and disclose a kind of modular direct-drive numerical control milling head quick-change interface device, including machine tool spindle unit and milling head, the machine tool spindle unit bottom end is fixedly connected with spindle joint, the milling head top end is fixedly connected with milling head joint, the spindle joint lower surface is fixedly connected with locking plate, locking hole is set up on the locking plate, the milling head joint upper surface is set up with the multiple installation slot of annular array, the utility model adopts the multiple hydraulic cylinder synchronous drive piston rod of annular array distribution and carries out locking, locking force distribution is uniform and can be accurately controlled by system oil pressure, more stable and consistent, effectively avoid the risk of loosening caused by vibration or force fluctuation in processing process, compared with pure friction type or magnetic locking mode, anti-overload capacity is stronger, and safety is higher.

Description

Technical Field

[0001] This utility model relates to the field of CNC milling head technology, and more specifically to a modular direct-drive CNC milling head quick-change interface device. Background Technology

[0002] In the field of CNC machine tools, especially multi-axis linkage machining centers, modular interchangeable milling head technology has become an important development direction in order to achieve efficient and flexible machining of complex workpieces. Its core lies in the quick-change interface device that connects the machine tool spindle and the milling head. The performance of this device, especially the reliability, rigidity and accuracy retention of the locking mechanism, directly determines the machining capacity, efficiency and safety of the entire machine tool.

[0003] Traditional connections are typically made by locking with mechanical bolts. While this method is simple and low-cost, the replacement process is extremely time-consuming and labor-intensive. The consistency of the locking force depends entirely on the operator's experience, and uneven preload can easily lead to an imbalance of forces on the mating surfaces, resulting in loss of precision or loosening under high cutting torque, thus compromising safety. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a modular direct-drive CNC milling head quick-change interface device to solve the problems existing in the background art.

[0005] This utility model provides the following technical solution: a modular direct-drive CNC milling head quick-change interface device, including a machine tool spindle unit and a milling head. The bottom end of the machine tool spindle unit is fixedly connected to a spindle connector, and the top end of the milling head is fixedly connected to a milling head connector. A locking plate is fixedly connected to the lower surface of the spindle connector, and a locking hole is provided on the locking plate. The upper surface of the milling head connector has multiple mounting slots arranged in a circular array. The upper surface of the milling head connector, located beside the mounting slots, has clearance slots that cooperate with the locking plate. A circular hole is provided on one side of the clearance slot to connect the clearance slot with the mounting slot. A hydraulic cylinder is provided in the mounting slot, and a piston rod is slidably connected in the hydraulic cylinder. The end of the piston rod passes through the circular hole and is inserted into the locking hole.

[0006] As a further embodiment of this utility model, a circular plate is fixedly connected to the lower surface of the spindle connector, and two square blocks are fixedly connected to the lower surface of the circular plate. A circular groove for cooperating with the circular plate is opened on the upper surface of the milling head connector, and a square groove for cooperating with the square blocks is opened on the bottom inner wall of the circular groove.

[0007] As a further embodiment of this utility model, positioning posts are fixedly connected to the lower surfaces of both blocks, and positioning grooves that cooperate with the positioning posts are provided on the bottom inner wall of the square groove.

[0008] As a further embodiment of this invention, the diameter of the piston rod end, the diameter of the circular hole, and the diameter of the locking hole are all equal.

[0009] As a further embodiment of this utility model, both the bottom edge of the positioning post and the bottom edge of the locking plate are chamfered.

[0010] As a further embodiment of this utility model, a plurality of cylinder joints for use with hydraulic cylinders are fixedly connected to the outer circumferential wall of the milling head joint.

[0011] As a further embodiment of this utility model, all of the aforementioned cylinder joints are connected to the end joints of the oil delivery pipes in the external hydraulic system.

[0012] As a further embodiment of this invention, the spindle connector is provided with a medium channel for connecting power, coolant, etc. after docking.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model uses multiple hydraulic cylinders arranged in a ring array to synchronously drive the piston rod for locking. The locking force is evenly distributed and can be precisely controlled by the system oil pressure, making it more stable and consistent. This effectively avoids the risk of loosening caused by vibration or force fluctuations during processing. Compared with pure friction or magnetic locking methods, mechanical locking has stronger overload resistance and higher safety.

[0015] 2. This utility model forms a multi-level progressive positioning system through the primary guidance of the circular plate and circular groove, the circumferential positioning of the symmetrical block and square groove, and the final precise positioning of the positioning post and positioning slot. This eliminates all degrees of freedom and ensures extremely high repeatability positioning accuracy between the milling head and the spindle.

[0016] 3. The docking, locking and separation processes of this utility model are fully automated by the machine tool's hydraulic control system, eliminating the tedious manual alignment and bolt tightening steps, greatly reducing auxiliary time, and improving machine tool utilization and production efficiency. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention.

[0018] Figure 2 This is a schematic diagram of the bottom of the spindle connector of this utility model.

[0019] Figure 3 This is a structural diagram of the milling head connector of this utility model.

[0020] The attached figures are labeled as follows: 1. Machine tool spindle unit; 2. Milling head connector; 3. Spindle connector; 4. Locking plate; 5. Locking hole; 6. Medium channel; 7. Mounting groove; 8. Alternating groove; 9. Hydraulic cylinder; 10. Cylinder connector; 11. Round hole; 12. Piston rod; 13. Round groove; 14. Round plate; 15. Square block; 16. Positioning pin; 17. Square groove; 18. Positioning groove. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. This utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Reference Figures 1-3 This utility model provides a modular direct-drive CNC milling head quick-change interface device, including a machine tool spindle unit 1 and a milling head. The bottom end of the machine tool spindle unit 1 is fixedly connected to a spindle connector 3 by bolts, and the top end of the milling head is fixedly connected to a milling head connector 2 by bolts. The lower surface of the spindle connector 3 is fixedly connected to a locking plate 4 by bolts. The locking plate 4 has a locking hole 5. The upper surface of the milling head connector 2 has multiple mounting grooves 7 arranged in a ring array. The upper surface of the milling head connector 2 and the position next to the mounting grooves 7 are all provided with clearance grooves 8 that cooperate with the locking plate 4. A circular hole 11 is provided on one side of the clearance groove 8 to connect the clearance groove 8 with the mounting groove 7. A hydraulic cylinder 9 is provided in the mounting groove 7. A piston rod 12 is slidably connected in the hydraulic cylinder 9. The end of the piston rod 12 passes through the circular hole 11 and is inserted into the locking hole 5.

[0023] In use, the machine tool spindle unit 1 carries the spindle connector 3 to the tool change position. The machine tool spindle unit 1 moves downward along the Z-axis inside the milling machine, so that the spindle connector 3 is aligned with and close to the milling head connector 2. The locking plate 4 at the bottom of the spindle connector 3 falls into the clearance groove 8 on the upper surface of the milling head connector 2, preparing for the final locking action.

[0024] Subsequently, the machine tool's hydraulic system supplies oil to the cylinder joint 10 through oil pipes. The pressurized oil enters the hydraulic cylinder 9, pushing the piston rod 12 outward. The piston rod 12 passes through the round hole 11 and is precisely inserted into the locking hole 5 on the locking plate 4. Due to the synchronous operation of multiple hydraulic cylinders 9, all piston rods 12 are inserted into the locking hole 5 at the same time, generating a huge vertical tension force, which firmly pulls the spindle joint 3 and the milling head joint 2 together, forming a high-rigidity and high-reliability connection, thus completing the installation operation. Disassembly can be performed by reversing the operation.

[0025] Multiple hydraulic cylinders 9 arranged in a ring array synchronously drive the piston rod 12 for locking. The locking force is evenly distributed and can be precisely controlled by the system oil pressure, making it more stable and consistent. This effectively avoids the risk of loosening caused by vibration or force fluctuations during processing. Compared with pure friction or magnetic locking methods, mechanical locking has stronger overload resistance and higher safety.

[0026] In this utility model, a circular plate 14 is fixedly connected to the lower surface of the spindle connector 3 by bolts, and two square blocks 15 are fixedly connected to the lower surface of the circular plate 14 by bolts. A circular groove 13 that cooperates with the circular plate 14 is opened on the upper surface of the milling head connector 2, and a square groove 17 that cooperates with the square blocks 15 is opened on the bottom inner wall of the circular groove 13.

[0027] As the spindle connector 3 moves downward, the circular plate 14 fixed at its bottom is first guided into the circular groove 13 of the milling head connector 2. This process achieves initial radial coarse positioning of the interface, prevents collisions, and guides subsequent precision components to dock smoothly. The two square blocks 15 at the bottom of the circular plate 14 are then guided into the square groove 17. This asymmetrical square design constitutes circumferential positioning, ensuring that the spindle and the milling head are completely aligned in the rotation direction, and ensuring accurate angular phase of power transmission and signal interface.

[0028] Through the primary guidance of the circular plate 14 and the circular groove 13, the circumferential positioning of the two square blocks 15 and the square groove 17, and the final precise positioning of the positioning post 16 and the positioning groove 18, a multi-level progressive positioning system is formed, eliminating all degrees of freedom and ensuring extremely high repeatability positioning accuracy between the milling head and the spindle.

[0029] Furthermore, the lower surfaces of both blocks 15 are fixedly connected with positioning posts 16 by bolts, and the bottom inner wall of the square groove 17 is provided with positioning grooves 18 that cooperate with the positioning posts 16. The bottom edge of the positioning posts 16 and the bottom edge of the locking plate 4 are both chamfered.

[0030] As block 15 is inserted into slot 17, positioning post 16 at the bottom of block 15 is inserted into positioning slot 18, and precise positioning eliminates all degrees of freedom.

[0031] In this invention, the diameter of the piston rod 12 end, the diameter of the circular hole 11, and the diameter of the locking hole 5 are all equal.

[0032] In this utility model, multiple cylinder joints 10 for use with hydraulic cylinders 9 are fixedly connected to the outer circumference of the milling head joint 2 by bolts.

[0033] Furthermore, multiple cylinder joints 10 are connected to the end joints of the oil delivery pipes in the external hydraulic system.

[0034] The docking, locking, and separation processes are all automatically completed by the machine tool's hydraulic control system, eliminating tedious manual alignment and bolt tightening steps, greatly reducing auxiliary time, and improving machine tool utilization and production efficiency.

[0035] In this invention, a medium channel 6 is provided on the spindle connector 3 for connecting electricity, coolant, etc. after docking.

[0036] While the interface is fully locked, the medium channel 6 integrated inside the spindle connector 3 is precisely connected to the corresponding channel inside the milling head, providing power to the direct drive motor and supporting various operations of the milling head.

[0037] The use of this utility model involves the following steps:

[0038] S1: During use, the machine tool spindle unit 1 carries the spindle connector 3 to the tool change position. The machine tool spindle unit 1 moves downward along the Z-axis inside the milling machine, so that the spindle connector 3 is aligned with and close to the milling head connector 2. As the spindle connector 3 moves downward, the circular plate 14 fixed at its bottom is first inserted into the circular groove 13 of the milling head connector 2. This process realizes the initial radial coarse positioning of the interface, prevents collisions, and guides the subsequent precision parts to be smoothly connected.

[0039] S2: The two square blocks 15 at the bottom of the circular plate 14 are then guided into the square groove 17. This asymmetrical square design constitutes circumferential positioning, ensuring that the spindle and the milling head are completely aligned in the rotation direction, and ensuring that the angular phase of the power transmission and signal interface is accurate. At the same time as the square block 15 is guided into the square groove 17, the positioning post 16 at the bottom of the square block 15 is inserted into the positioning groove 18. Precise positioning eliminates all degrees of freedom.

[0040] S3: At the same time, the locking plate 4 at the bottom of the spindle connector 3 falls into the clearance groove 8 on the upper surface of the milling head connector 2, preparing for the final locking action.

[0041] S4: After all positioning components are in place, the machine tool's hydraulic system supplies oil to the cylinder joint 10 through the oil pipe. The pressurized oil enters the hydraulic cylinder 9, pushing the piston rod 12 outward. The piston rod 12 passes through the round hole 11 and is precisely inserted into the locking hole 5 on the locking plate 4. Due to the synchronous action of multiple hydraulic cylinders 9, all piston rods 12 are inserted into the locking hole 5 at the same time, generating a huge vertical tension force, which firmly pulls the spindle joint 3 and the milling head joint 2 together, forming a high-rigidity and high-reliability connection.

[0042] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0043] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.

[0044] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

Claims

1. A modular direct-drive CNC milling head quick-change interface device, comprising a machine tool spindle unit (1) and a milling head, characterized in that: The bottom end of the machine tool spindle unit (1) is fixedly connected to a spindle connector (3), the top end of the milling head is fixedly connected to a milling head connector (2), the lower surface of the spindle connector (3) is fixedly connected to a locking plate (4), the locking plate (4) is provided with a locking hole (5), the upper surface of the milling head connector (2) is provided with multiple mounting slots (7) arranged in a ring array, the upper surface of the milling head connector (2) and the position next to the mounting slot (7) are provided with a clearance slot (8) that cooperates with the locking plate (4), one side of the clearance slot (8) is provided with a round hole (11) that connects the clearance slot (8) and the mounting slot (7), the mounting slot (7) is provided with a hydraulic cylinder (9), the hydraulic cylinder (9) is slidably connected with a piston rod (12), the end of the piston rod (12) passes through the round hole (11) and is inserted into the locking hole (5).

2. The modular direct-drive CNC milling head quick-change interface device according to claim 1, characterized in that: A circular plate (14) is fixedly connected to the lower surface of the spindle connector (3), and two square blocks (15) are fixedly connected to the lower surface of the circular plate (14). A circular groove (13) that mates with the circular plate (14) is opened on the upper surface of the milling head connector (2), and a square groove (17) that mates with the square blocks (15) is opened on the bottom inner wall of the circular groove (13).

3. The quick-change interface device of claim 2, wherein: The lower surfaces of the two blocks (15) are fixedly connected with positioning posts (16), and the bottom inner wall of the square groove (17) is provided with positioning grooves (18) that cooperate with the positioning posts (16).

4. The quick-change interface device of claim 1, wherein: The diameter of the piston rod (12) end, the diameter of the circular hole (11), and the diameter of the locking hole (5) are all equal.

5. The modular direct drive CNC milling head quick change interface device of claim 3, wherein: Both the bottom edge of the positioning post (16) and the bottom edge of the locking plate (4) are chamfered.

6. The modular direct-drive CNC milling head quick-change interface device of claim 1, wherein: Multiple cylinder connectors (10) that cooperate with hydraulic cylinders (9) are fixedly connected to the outer circumference of the milling head connector (2).

7. The modular direct-drive CNC milling head quick-change interface device according to claim 6, characterized in that: Multiple of the cylinder joints (10) are connected to the end joints of the oil delivery pipes in the external hydraulic system.

8. The modular direct drive CNC milling head quick change interface apparatus of claim 1, wherein: The spindle connector (3) is provided with a medium channel (6).

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