Numerical control milling machine with milling cutter convenient to replace

Abstract

The utility model relates to the technical field of numerical control milling machines, and discloses a numerical control milling machine convenient for replacing a milling cutter, which comprises a rack, a first lead screw guide rail is arranged at the top of the rack, a second lead screw guide rail is arranged at the output end of the first lead screw guide rail, and a mounting rack is arranged at the output end of the second lead screw guide rail. And a motor is fixedly connected to the inner bottom of the mounting frame, a mounting mechanism is fixedly connected to the output end of the motor, a third lead screw guide rail is fixedly connected to the bottom of the rack, and a cutting table is arranged at the output end of the third lead screw guide rail. According to the milling cutter disclosed by the utility model, the milling cutter is conveniently replaced while the stability and the safety in the machining process are ensured, so that the downtime is reduced, and the overall working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of CNC milling machine technology, and in particular to a CNC milling machine that facilitates the replacement of milling cutters. Background Technology

[0002] A CNC milling machine is a machine tool that uses Computer Numerical Control (CNC) technology to automate machining processes, enabling precise milling, drilling, and boring of complex parts. The milling cutter on a CNC milling machine is a tool mounted on the spindle for cutting material; depending on the machining requirements, it can be divided into various types such as face cutters, end mills, and ball end mills. It has wide applications, primarily for the efficient machining of precision parts (such as molds, aerospace components, and automotive parts) in manufacturing.

[0003] A CNC milling machine typically consists of a bed, spindle, worktable, feed system, CNC system, and cooling system. The bed provides support and stability; the spindle mounts and drives the milling cutter for cutting; the worktable moves along the X, Y, and Z axes to position the workpiece; the feed system controls the movement of the worktable and spindle; the CNC system receives the machining program and coordinates the work of each component; and the cooling system reduces cutting temperature and extends tool life. Its working principle involves the CNC system converting the machining program into electrical signals, which drive servo motors to control the movement of the spindle and worktable, allowing the milling cutter to precisely cut the workpiece along a preset path, thus achieving efficient and high-precision machining.

[0004] In existing technologies, traditional tool changing mechanisms are complex in design, rely on special tools and manual operation, which makes the tool changing process time-consuming and prone to errors. This makes it difficult for some milling machines to easily change milling cutters, thereby reducing production efficiency. In particular, in multi-process machining that requires frequent tool changes, time-consuming operations will slow down the overall production rhythm.

[0005] Therefore, to address the aforementioned problems, a CNC milling machine that facilitates the replacement of milling cutters is proposed. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a CNC milling machine that facilitates the replacement of milling cutters, aiming to improve the problem that some existing milling machines have difficulty in conveniently replacing milling cutters.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A CNC milling machine with easy-to-change milling cutter includes a frame, a first lead screw guide rail is provided on the top of the frame, a second lead screw guide rail is provided at the output end of the first lead screw guide rail, a mounting bracket is provided at the output end of the second lead screw guide rail, a motor is fixedly connected to the inner bottom of the mounting bracket, a mounting mechanism is fixedly connected to the output end of the motor, a third lead screw guide rail is fixedly connected to the bottom of the frame, a cutting table is provided at the output end of the third lead screw guide rail, and a fixing mechanism is provided on the top of the cutting table;

[0009] The mounting mechanism includes a rotating disk, the top of which is fixedly connected to the output end of the motor, a fixed disk fixedly connected to the bottom of the motor, a snap-fit ​​assembly slidably connected inside the fixed disk, a mounting post detachably connected to the center of the fixed disk, and a milling cutter fixedly connected to the bottom of the mounting post.

[0010] As a further description of the above technical solution:

[0011] The snap-fit ​​assembly includes multiple plug-in blocks, the outer sides of which are slidably connected to the interior of the fixing disk. The interior of the fixing disk is provided with multiple limiting grooves, the outer sides of which are slidably connected to the interior of the limiting grooves, and a sliding post is fixedly connected to the top of each plug-in block.

[0012] As a further description of the above technical solution:

[0013] The rotating disk has multiple arc-shaped grooves inside, and the outer side of the sliding column is slidably connected to the inside of the arc-shaped grooves;

[0014] As a further description of the above technical solution:

[0015] The mounting post has multiple slots on its outer side, and one end of the plug block can be detachably connected to the inside of the slots.

[0016] As a further description of the above technical solution:

[0017] The fixing mechanism includes a fixing platform, the bottom of which is detachably connected to the top of the cutting table. The bottom of the fixing platform is detachably connected to a plurality of pins, the bottom of which is detachably connected to the top of the cutting table. A threaded rod is threadedly connected to the top of the fixing platform, and a pressure plate is rotatably connected to the bottom of the threaded rod. A clamping assembly is fixedly connected inside the fixing platform.

[0018] As a further description of the above technical solution:

[0019] The clamping assembly includes two slide rods, the two ends of which are fixedly connected to the inside of the fixed platform. Sliding posts are slidably connected to the outer sides of the two slide rods. A cam is rotatably connected to the top of the sliding post, and the convex surface of the cam contacts the top of the threaded rod.

[0020] As a further description of the above technical solution:

[0021] The bottom of the sliding pile is threaded with two set screws, one end of which contacts the outer side of the sliding rod;

[0022] As a further description of the above technical solution:

[0023] The inner side of the pressure plate is slidably connected to the outer side of the two sliding rods, and the outer side of the sliding pile is slidably connected to the top of the fixed platform.

[0024] This utility model has the following beneficial effects:

[0025] 1. In this utility model, the milling cutter is inserted into the middle position of the fixed plate through the mounting post, and the rotating plate is driven by the motor to rotate to the preset position. The sliding of the arc groove and the limiting groove drives the plug block into the slot on the mounting post to achieve quick snap-fit ​​positioning. When it is necessary to replace the mounting mechanism, the reverse drive motor is used to achieve quick release. Thus, while ensuring the stability and safety of the processing, downtime is reduced and the overall work efficiency is improved.

[0026] 2. In this utility model, the fixed table is placed on the corresponding mounting hole of the cutting table and fixed with pins. The workpiece is squeezed and fixed vertically downward by the combined action of the threaded rod and the pressure plate. The position of the sliding pin is fixed by the cooperation of the sliding pile and the set screw to prevent the threaded rod from moving accidentally. This ensures the stability of the workpiece during the processing and ensures that the workpiece is firmly fixed during the processing. It effectively prevents the workpiece from being displaced or loosened due to vibration or external force. Attached Figure Description

[0027] Figure 1 This is a three-dimensional schematic diagram of a CNC milling machine that facilitates the replacement of milling cutters, as proposed in this utility model.

[0028] Figure 2 This is a schematic diagram of the mounting mechanism for a CNC milling machine that facilitates the replacement of milling cutters, as proposed in this utility model.

[0029] Figure 3 An exploded view of the rotating disk of a CNC milling machine that facilitates cutter replacement, as proposed in this utility model;

[0030] Figure 4 This is a schematic diagram of the fixing mechanism of a CNC milling machine that facilitates the replacement of milling cutters, as proposed in this utility model.

[0031] Figure 5 for Figure 2 Enlarged view of point A in the middle.

[0032] Legend:

[0033] 1. Frame; 2. First lead screw guide rail; 3. Second lead screw guide rail; 4. Mounting bracket; 5. Motor; 6. Mounting mechanism; 601. Rotating disk; 602. Arc groove; 603. Fixed disk; 604. Limiting groove; 605. Sliding column; 606. Insertion block; 607. Mounting column; 608. Slot; 609. Milling cutter; 7. Third lead screw guide rail; 8. Cutting table; 9. Fixing mechanism; 901. Fixed table; 902. Pin; 903. Threaded rod; 904. Pressure plate; 905. Slide rod; 906. Sliding pile; 907. Set screw; 908. Cam. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Reference Figure 1 This utility model provides an embodiment of a CNC milling machine that facilitates cutter replacement, comprising a frame 1, with a first lead screw guide 2 mounted on the top of the frame 1. The design of the first lead screw guide 2 enables the milling machine to move and position precisely in the X-axis direction, providing basic support for subsequent machining. A second lead screw guide 3 is mounted at the output end of the first lead screw guide 2. The addition of the second lead screw guide 3 enables the milling machine to move in the Y-axis direction, further expanding the machining range. A mounting bracket 4 is mounted at the output end of the second lead screw guide 3. The mounting bracket 4, as a key component connecting the motor 5 and the mounting mechanism 6, ensures the stability and rigidity of the entire system. The motor 5 is fixedly connected to the inner bottom of the mounting bracket 4. The selection of the motor 5 needs to consider power and speed to meet different machining requirements. The mounting mechanism 6 is fixedly connected to the output end of the motor 5. The design of the mounting mechanism 6 makes the replacement of the cutter 609 simple and quick, improving work efficiency. A third lead screw guide 7 is fixedly connected to the bottom of the frame 1. The introduction of the third lead screw guide 7 enables the milling machine to move in the Z-axis direction, achieving full coverage of three-dimensional space. A cutting table 8 is provided at the output end of the third lead screw guide 7. The stability and accuracy of the cutting table 8, as the workpiece bearing platform, directly affect the processing quality. A fixing mechanism 9 is provided on the top of the cutting table 8.

[0036] Reference Figure 2 , Figure 3 and Figure 5 The mounting mechanism 6 includes a rotating disk 601, the top of which is fixedly connected to the output end of the motor 5. The design of the rotating disk 601 allows the milling cutter 609 to rotate with the motor 5, achieving the cutting function. A fixed disk 603 is fixedly connected to the bottom of the motor 5. The fixed disk 603 serves as the foundation component of the mounting mechanism 6, ensuring the stability of the entire structure. A snap-fit ​​assembly is slidably connected inside the fixed disk 603. The snap-fit ​​assembly design makes the installation and removal of the milling cutter 609 simple and quick, improving work efficiency. A mounting post 607 is detachably connected to the center of the fixed disk 603. The design of the mounting post 607 allows for quick positioning and fixing of the milling cutter 609, reducing replacement time. The bottom of the mounting post 607 is fixedly connected to the milling cutter 609. The selection of the milling cutter 609 needs to be based on the processing material and process requirements to ensure processing quality.

[0037] The snap-fit ​​assembly includes multiple plug-in blocks 606, the outer sides of which are slidably connected to the interior of the fixed plate 603. The design of the plug-in blocks 606 allows for quick positioning and fixation of the end mill 609, reducing replacement time. The interior of the fixed plate 603 has multiple limiting grooves 604. The design of the limiting grooves 604 ensures the stability and precision of the plug-in blocks 606 during sliding. The outer sides of the plug-in blocks 606 are slidably connected to the interior of the limiting grooves 604. This design allows the plug-in blocks 606 to slide precisely within the fixed plate 603, ensuring stable installation of the end mill 609. The outer side of the mounting post 607 has multiple retaining slots 608. The design of the retaining slots 608 allows the plug-in blocks 606 to snap into quickly, achieving rapid fixation of the end mill 609. The adjacent ends of the plug-in blocks 606 are detachably connected to the interior of the retaining slots 608. This connection method makes the replacement of the end mill 609 simple and quick, improving work efficiency. A sliding post 605 is fixedly connected to the top of the plug-in block 606. The design of the sliding post 605 allows the plug-in block 606 to slide within the arc-shaped groove 602 of the rotating disk 601, achieving rapid positioning of the end mill 609. Multiple arc-shaped grooves 602 are formed inside the rotating disk 601. The design of the arc-shaped grooves 602 allows the sliding post 605 to slide precisely within the rotating disk 601, ensuring stable installation of the end mill 609. The outer side of the sliding post 605 is slidably connected to the inside of the arc-shaped groove 602. This design allows the sliding post 605 to slide precisely within the rotating disk 601, ensuring stable installation of the end mill 609.

[0038] Reference Figure 1 and Figure 4The fixing mechanism 9 includes a fixing table 901, the bottom of which is detachably connected to the top of the cutting table 8. The design of the fixing table 901 ensures the workpiece is securely fixed to the cutting table 8, preventing movement or vibration during processing. Multiple pins 902 are detachably connected to the bottom of the fixing table 901. The pins 902 allow for quick positioning and fixing of the fixing table 901, reducing installation time. The bottom of the pins 902 is detachably connected to the top of the cutting table 8. This connection method allows the fixing table 901 to be quickly fixed to the cutting table 8, improving work efficiency. A threaded rod 903 is threadedly connected to the top of the fixing table 901. The threaded rod 903 allows the pressure plate 904 to move vertically, achieving workpiece clamping. The pressure plate 904 is rotatably connected to the bottom of the threaded rod 903. The pressure plate 904 ensures the workpiece is evenly clamped, preventing deformation or damage due to excessive local pressure. A clamping assembly is fixedly connected internally to the fixing table 901. The clamping assembly is designed to securely hold the workpiece on the cutting table 8, preventing it from moving or vibrating during processing.

[0039] The clamping assembly includes two slide rods 905, both ends of which are fixedly connected to the interior of the fixed platform 901. The design of the slide rods 905 allows the pressure plate 904 to slide precisely in the vertical direction, ensuring stable clamping of the workpiece. The inner side of the pressure plate 904 is slidably connected to the outer side of the two slide rods 905. This design allows the pressure plate 904 to slide precisely on the slide rods 905, ensuring stable clamping of the workpiece. A sliding post 906 is slidably connected to the outer side of the two slide rods 905. The design of the sliding post 906 allows the cam 908 to move up and down with the rotation of the threaded rod 903, achieving clamping of the workpiece. The outer side of the sliding post 906 is slidably connected to the top of the fixed platform 901. This design allows the sliding post 906 to slide precisely on the top of the fixed platform 901, ensuring stable clamping of the workpiece. A cam 908 is rotatably connected to the top of the sliding post 906. The design of the cam 908 allows the threaded rod 903 to move up and down, achieving clamping of the workpiece. The convex surface of cam 908 contacts the top of threaded rod 903. This design allows cam 908 to press against the top of threaded rod 903 through its convex surface, preventing accidental movement of threaded rod 903 during machining. The bottom of sliding post 906 is threaded with two set screws 907. The design of set screws 907 allows sliding post 906 to be fixed to slide rod 905 by increasing friction, ensuring stable clamping of the workpiece. One end of set screw 907 contacts the outer side of slide rod 905. This design allows set screw 907 to increase friction through contact with slide rod 905, ensuring stable fixation of sliding post 906.

[0040] Working principle: According to the shape and size of the workpiece to be processed, the fixed table 901 is placed on the corresponding mounting hole of the cutting table 8, and the pin 902 is inserted to stabilize the fixed table 901. Then, the threaded rod 903 is rotated. As the threaded rod 903 rotates, the pressure plate 904 moves vertically downward due to the restriction of the sliding rod 905 to squeeze and fix the workpiece. Then, by unscrewing the set screw 907, the sliding pile 906 can slide on the two sliding rods 905, so that the cam 908 can move up and down synchronously with the threaded rod 903. Then, the set screw 907 is screwed into the sliding pile 906 to squeeze it against the sliding rod 905, thereby fixing the position of the sliding pile 906 by increasing the friction. Then, the cam 908 is rotated, and the convex surface of the cam 908 squeezes the top of the threaded rod 903 to prevent the threaded rod 903 from moving accidentally due to vibrations generated during the operation of the milling cutter 609, which would cause the workpiece to be unstable.

[0041] Next, insert the mounting post 607 on the milling cutter 609 into the middle of the fixed plate 603, and then start the motor 5. The motor 5 drives the rotating plate 601 to rotate to the preset position, so that the sliding post 605 slides along the arc groove 602 through the action of the arc groove 602. This drives the plug block 606 to slide along the limiting groove 604 in the fixed plate 603 and lock into the slot 608 on the mounting post 607, achieving quick locking and positioning. When it is necessary to replace the mounting mechanism 6, the milling cutter 609 can be released by the reverse rotation of the motor 5 through the reverse movement of the plug block 606, so that the mounting post 607 can be disengaged from the fixed plate 603, thus facilitating the replacement of the milling cutter 609.

[0042] When the motor 5 operates and engages with the milling cutter 609, the motor 5 continues to operate, causing the milling cutter 609 to start rotating and thus begin working. Through the driving action of the first lead screw guide rail 2, the second lead screw guide rail 3, and the third lead screw guide rail 7, the milling cutter 609 can precisely machine the workpiece according to the requirements.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A CNC milling machine with easy-to-change milling cutter, comprising a frame (1), characterized in that: The top of the frame (1) is provided with a first lead screw guide rail (2), the output end of the first lead screw guide rail (2) is provided with a second lead screw guide rail (3), the output end of the second lead screw guide rail (3) is provided with a mounting bracket (4), the inner bottom of the mounting bracket (4) is fixedly connected with a motor (5), the output end of the motor (5) is fixedly connected with a mounting mechanism (6), the bottom of the frame (1) is fixedly connected with a third lead screw guide rail (7), the output end of the third lead screw guide rail (7) is provided with a cutting table (8), and the top of the cutting table (8) is provided with a fixing mechanism (9). The mounting mechanism (6) includes a rotating disk (601), the top of which is fixedly connected to the output end of the motor (5), and a fixed disk (603) is fixedly connected to the bottom of the motor (5). A snap-fit ​​assembly is slidably connected inside the fixed disk (603), and a mounting post (607) is detachably connected to the center of the fixed disk (603). A milling cutter (609) is fixedly connected to the bottom of the mounting post (607).

2. The CNC milling machine with easy-to-change milling cutter according to claim 1, characterized in that: The snap-fit ​​assembly includes multiple plug-in blocks (606), the outer sides of which are slidably connected to the interior of the fixing disk (603). The interior of the fixing disk (603) is provided with multiple limiting grooves (604), the outer sides of which are slidably connected to the interior of the limiting grooves (604), and a sliding post (605) is fixedly connected to the top of each plug-in block (606).

3. A CNC milling machine with easy-to-change milling cutter according to claim 2, characterized in that: The rotating disk (601) has multiple arc-shaped grooves (602) inside, and the outer side of the sliding column (605) is slidably connected to the inside of the arc-shaped grooves (602).

4. A CNC milling machine with easy-to-change milling cutter according to claim 2, characterized in that: The mounting post (607) has multiple slots (608) on its outer side, and one end of the plug block (606) is detachably connected to the inside of the slots (608).

5. A CNC milling machine with easy-to-change milling cutter according to claim 1, characterized in that: The fixing mechanism (9) includes a fixing platform (901), the bottom of which is detachably connected to the top of the cutting table (8). The bottom of the fixing platform (901) is detachably connected to a plurality of pins (902), the bottom of which is detachably connected to the top of the cutting table (8). The top of the fixing platform (901) is threadedly connected to a threaded rod (903), the bottom of which is rotatably connected to a pressure plate (904). A clamping assembly is fixedly connected inside the fixing platform (901).

6. A CNC milling machine with easy-to-change milling cutter according to claim 5, characterized in that: The clamping assembly includes two slide rods (905), the two ends of which are fixedly connected to the inside of the fixed platform (901). Sliding posts (906) are slidably connected to the outer sides of the two slide rods (905). A cam (908) is rotatably connected to the top of the sliding post (906). The convex surface of the cam (908) contacts the top of the threaded rod (903).

7. A CNC milling machine with easy-to-change milling cutter according to claim 6, characterized in that: The bottom of the sliding pile (906) is threaded with two set screws (907), one end of which contacts the outside of the sliding rod (905).

8. A CNC milling machine with easy-to-change milling cutter according to claim 6, characterized in that: The inner side of the pressure plate (904) is slidably connected to the outer side of the two slide rods (905), and the outer side of the sliding pile (906) is slidably connected to the top of the fixed platform (901).

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