Automatic tool changing tool of numerical control machining tool

Abstract

The utility model belongs to the field of numerical control machining tools, and particularly relates to an automatic tool changing tool of a numerical control machining tool. Supporting rods are fixedly connected to the four corners of the top face of the machine tool, an extension plate is arranged at the bottom of one supporting rod, fixing rods are arranged at the top of the extension plate at equal intervals, U-shaped clamps are arranged at the tops of the fixing rods, a tool is sleeved with the U-shaped clamps, a circular block is fixed to the top of the tool, and a butt joint rod is connected to the top of the circular block. A forward conical cap is arranged at the top end of the butt-joint rod, and a reverse conical cap is slidably connected to the surface of the butt-joint rod; a driving motor A is arranged on one side of the top of the supporting rod; the inner cavity of the connecting assembly is matched with the inclined face of the forward conical cap, when the forward conical cap is inserted, the inclined face of the trapezoidal block is extruded, the spring is compressed, the trapezoidal block is driven to retract into the directional hole, the opposite inclined face of the reverse conical cap pushes the trapezoidal block to pop out during lifting, a two-way self-locking structure is formed, rapid clamping and releasing of a tool are achieved, and tool changing jamming is avoided.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tools, specifically an automatic tool changer for CNC machine tools. Background Technology

[0002] A CNC machine tool is a high-precision mechanical device used to process materials such as metals and plastics. It uses a computer control system to control the movement trajectory and processing technology of the machine tool to achieve automated processing.

[0003] In the prior art, such as in publication number CN222344914U, an automatic tool changer for a CNC machine tool is disclosed. It includes an adjustment assembly; it also includes a clamping assembly, a feeding assembly, a loading assembly, a three-jaw clamping cylinder, and a CNC cutting head. The adjustment assembly is equipped with a clamping assembly for holding the cutting head; the adjustment assembly is equipped with a feeding assembly for removing the cutting head; the feeding assembly is equipped with a loading assembly for storing the cutting head; and the three-jaw clamping cylinder is the output end of the CNC machine tool.

[0004] While the aforementioned patent solves the problem of the inconvenience of quickly placing the tool head into the tool magazine during installation, the inability to quickly disassemble and replace the tool head during replacement leads to jamming, long processing time, and the need to stop the machine during processing, affecting the processing progress. Therefore, an automatic tool changer for CNC machine tools is proposed to address the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, such as the inability to quickly disassemble and replace the tool head during tool head replacement, which leads to jamming, long processing time, and the need to stop the machine during processing, thus affecting the processing progress, this utility model proposes an automatic tool changer for CNC machine tools.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The automatic tool changing fixture for a CNC machining tool of this utility model includes a machine tool; support rods are fixedly connected to the four corners of the top surface of the machine tool, an extension plate is provided at the bottom of one of the support rods, a fixed rod is provided at equal intervals at the top of the extension plate, a U-shaped clamp is provided at the top of the fixed rod, a tool is sleeved inside the U-shaped clamp, a circular block is fixed at the top of the tool, a connecting rod is connected at the top of the circular block, a positive conical cap is provided at the top of the connecting rod, and a negative conical cap is slidably connected to the surface of the connecting rod;

[0007] A drive motor A is installed on one side of the top of the support rod. The output end of the drive motor A is connected to the threaded screw A. A movable frame is installed on the surface of the threaded screw A. A drive motor B is installed on one side of the movable frame. The output end of the drive motor B is connected to the threaded screw B. A movable block is installed on the surface of the threaded screw B. A cylinder and connecting assembly are installed at the bottom of the movable block.

[0008] The connecting assembly includes a connecting block at the bottom of the cylinder. The connecting block has an inner cavity that fits the conical cap. An directional hole is formed on the inner wall at the bottom of the inner cavity. A spring and a trapezoidal block are arranged in the directional hole. The inclined surface of the trapezoidal block is flush with the inclined surface of the conical cap. An inner rod is sleeved inside the spring. One end of the inner rod is fixed to the trapezoidal block.

[0009] Preferably, a limiting rod is slidably connected inside the movable frame and the movable block, and the limiting rod passes through one end of the movable frame and one side of the movable block respectively.

[0010] Preferably, the surface of the cutting tool has a U-shaped groove adapted to the U-shaped clamp, and the depth of the U-shaped groove is greater than the clamping height of the U-shaped clamp.

[0011] Preferably, the inclined surface of the inverted cone cap is opposite to the inclined surface of the trapezoidal block, and the bottom width of the inverted cone cap is smaller than the top width of the regular cone cap.

[0012] Preferably, the size of the trapezoidal block is smaller than the diameter of the directional hole, and the compression direction of the spring coincides with the axis of the inner rod.

[0013] Preferably, the A drive motor and the B drive motor are linked by a controller, and the extension and retraction stroke of the cylinder covers the docking depth between the conical cap and the inner cavity.

[0014] The advantages of this utility model are:

[0015] 1. This utility model uses the inner cavity of the connecting component to cooperate with the inclined surface of the positive conical cap. When the positive conical cap is inserted, it squeezes the inclined surface of the trapezoidal block, compresses the spring, and drives the trapezoidal block to retract into the directional hole. When the opposite inclined surface of the reverse conical cap is lifted, it pushes the trapezoidal block out, forming a two-way self-locking structure, realizing the quick clamping and release of the tool and avoiding tool changing jams.

[0016] 2. This utility model uses A drive motor and B drive motor to drive the moving frame and moving block to move bidirectionally under the guidance of the limit rod, and accurately position them directly above the U-shaped clamp. Combined with the cylinder extension stroke covering the docking depth, it ensures that the tool changing process does not require machine stoppage, improving the continuity of processing. The tool surface is opened with a U-shaped groove to match the U-shaped clamp. The groove depth is greater than the clamping height, which not only ensures storage stability, but also facilitates the smooth release of the tool when the connecting block is gripped, reducing manual intervention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the machine tool structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the connection component structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the A-threaded lead screw and B-threaded lead screw of this utility model.

[0022] In the diagram: 1. Machine tool; 2. Support rod; 3. Extension plate; 4. Fixing rod; 5. U-shaped clamp; 6. Tool; 7. Circular block; 8. Connecting rod; 9. Positive conical cap; 10. Reverse conical cap; 11. A drive motor; 12. A threaded screw; 13. Moving frame; 14. B drive motor; 15. B threaded screw; 16. Moving block; 17. Cylinder; 18. Connecting assembly; 181. Connecting block; 182. Inner cavity; 183. Spring; 184. Trapezoidal block; 185. Inner rod; 19. Limiting rod; 20. U-shaped groove. Detailed Implementation

[0023] 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 scope of protection of the present utility model.

[0024] Please see Figures 1-4As shown, an automatic tool changer for a CNC machine tool includes a machine tool 1; support rods 2 are fixedly connected to the four corners of the top surface of the machine tool 1, one of the support rods 2 has an extension plate 3 at its bottom, and fixed rods 4 are equidistantly arranged at the top of the extension plate 3. A U-shaped clamp 5 is set at the top of the fixed rod 4, and a tool 6 is sleeved inside the U-shaped clamp 5. A circular block 7 is fixed at the top of the tool 6, and a connecting rod 8 is connected to the top of the circular block 7. A positive conical cap 9 is set at the top of the connecting rod 8, and a negative conical cap 10 is slidably connected to the surface of the connecting rod 8; an A drive motor 11 is set on one side of the top of the support rod 2, and the output end of the A drive motor 11 is connected to an A threaded screw 12. A movable frame 1 is set on the surface of the A threaded screw 12. 3. A B drive motor 14 is provided on one side of the movable frame 13. The output end of the B drive motor 14 is connected to the B threaded screw 15. A movable block 16 is provided on the surface of the B threaded screw 15. A cylinder 17 and a connecting assembly 18 are provided at the bottom of the movable block 16. The connecting assembly 18 includes a connecting block 181 at the bottom of the cylinder 17. An inner cavity 182 adapted to the positive conical cap 9 is opened inside the connecting block 181. An orientation hole is opened on the inner wall at the bottom end of the inner cavity 182. A spring 183 and a trapezoidal block 184 are provided in the orientation hole. The inclined surface of the trapezoidal block 184 is flush with the inclined surface of the positive conical cap 9. An inner rod 185 is sleeved inside the spring 183. One end of the inner rod 185 is fixed to the trapezoidal block 184.

[0025] During operation, four fixed support rods 2 are mounted on the top surface of machine tool 1. A fixed rod 4 and a U-shaped clamp 5 are mounted on the bottom extension plate 3 of one of the support rods 2. The working tool 6 is connected and fixed by the U-shaped clamp 5. The circular block 7 at the top of the working tool 6 is connected to the docking rod 8. A positive conical cap 9 is fixed at the top of the docking rod 8, and a negative conical cap 10 slides on the surface. The A drive motor 11 at the top of the support rod 2 drives the A threaded screw 12 to move the moving frame 13 longitudinally. The B drive motor 14 on the moving frame 13 drives the B threaded screw 15 to move the moving block 16. Laterally, the cylinder 17 at the bottom of the moving block 16 is connected to the connecting assembly 18. The inner cavity 182 of the connecting block 181 is adapted to the conical cap 9. The spring 183 and trapezoidal block 184 in the directional hole at the bottom of the inner cavity 182 cooperate with the conical cap 9 through the inclined surface. The inner rod 185 fixes the trapezoidal block 184 and restricts the compression direction of the spring 183. The inclined surface cooperation between the conical cap 9 and the trapezoidal block 184 realizes the rapid locking and releasing of the tool 6. The dual drive motors accurately position the moving block 16 through the double threaded screw, improving the tool changing efficiency.

[0026] Furthermore, a limiting rod 19 is slidably connected inside the movable frame 13 and the movable block 16, and the limiting rod 19 passes through one end of the movable frame 13 and one side of the movable block 16 respectively.

[0027] During operation, the moving frame 13 and the moving block 16 are internally connected by a limiting rod 19. The limiting rod 19 passes through one end of the moving frame 13 and one side of the moving block 16, respectively. The limiting rod 19 constrains the movement trajectory of the moving frame 13 and the moving block 16 to prevent deviation and ensure the positioning accuracy of tool changing.

[0028] Furthermore, a U-shaped groove 20 adapted to the U-shaped clamp 5 is formed on the surface of the tool 6, and the depth of the U-shaped groove 20 is greater than the clamping height of the U-shaped clamp 5;

[0029] During operation, a U-shaped groove 20 is formed on the surface of the tool 6. The depth of the U-shaped groove 20 is greater than the clamping height of the U-shaped clamp 5. The U-shaped groove 20 is adapted to the U-shaped clamp 5 to ensure that the tool 6 is stored stably and can be smoothly released when gripped.

[0030] Furthermore, the inclined surface of the inverted cone cap 10 is set opposite to the inclined surface of the trapezoidal block 184, and the bottom width of the inverted cone cap 10 is smaller than the top width of the positive cone cap 9;

[0031] During operation, the inclined surface of the reverse conical cap 10 is set opposite to the inclined surface of the trapezoidal block 184. The bottom width of the reverse conical cap 10 is smaller than the top width of the positive conical cap 9. The reverse conical cap 10 pushes the trapezoidal block 184 to reset, thereby enabling the tool 6 to be quickly unlocked.

[0032] Furthermore, the size of the trapezoidal block 184 is smaller than the diameter of the directional hole, and the compression direction of the spring 183 coincides with the axis of the inner rod 185.

[0033] During operation, the trapezoidal block 184 is smaller than the diameter of the directional hole, and the compression direction of the spring 183 coincides with the axis of the inner rod 185. The inner rod 185 guides the spring 183 to compress in a directional manner, preventing the trapezoidal block 184 from moving skewed and improving the locking reliability.

[0034] Furthermore, drive motor A 11 and drive motor B 14 are linked by a controller, and the extension and retraction stroke of cylinder 17 covers the docking depth between the conical cap 9 and the inner cavity 182.

[0035] During operation, drive motor A 11 and drive motor B 14 are linked by a controller. The extension and retraction stroke of cylinder 17 covers the docking depth between the conical cap 9 and the inner cavity 182. The controller links drive motor and cylinder 17 to achieve a fully automatic tool changing process and reduce manual intervention.

[0036] Working principle: Drive motor A 11 drives screw A 12 to move the moving frame 13 longitudinally. Drive motor B 14 drives screw B 15 to move block 16 laterally to directly above the U-shaped clamp 5 of the target tool 6. Cylinder 17 presses down connecting block 181 to insert the conical cap 9 into the inner cavity 182. The inclined surface of the conical cap 9 presses against the inclined surface of trapezoidal block 184 and compresses spring 183. When the reverse conical cap 10 moves down with cylinder 17 and contacts trapezoidal block 184, its reverse inclined surface pushes trapezoidal block 184 back into the directional hole. Spring 183 resets and pushes trapezoidal block 184 through inner rod 185 to lock the bottom of reverse conical cap 10, thus locking tool 6. When separating, cylinder 17 lifts up, the inclined surface of reverse conical cap 10 presses against trapezoidal block 184 to retract it into the directional hole, spring 183 compresses and releases the locking force, connecting block 181 disengages from conical cap 9, and the separation of tool 6 from U-shaped clamp 5 is completed.

[0037] The above are merely preferred embodiments of the present utility model and are 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, or similar improvements made within the theoretical and principle content of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic tool changer for a CNC machine tool, characterized in that: The machine tool (1) is provided with support rods (2) fixedly connected to the four corners of the top surface of the machine tool (1). One of the support rods (2) has an extension plate (3) at the bottom. The extension plate (3) has fixed rods (4) equidistantly arranged at the top. The fixed rods (4) have U-shaped clamps (5) at the top. The U-shaped clamps (5) are fitted with a tool (6). The tool (6) has a circular block (7) fixed at the top. The circular block (7) is connected to a connecting rod (8) at the top. The connecting rod (8) has a positive conical cap (9) at the top. The connecting rod (8) has a reverse conical cap (10) slidably connected to its surface. A drive motor (11) is provided on one side of the top of the support rod (2). The output end of the drive motor (11) is connected to the threaded screw (12). A movable frame (13) is provided on the surface of the threaded screw (12). A drive motor (14) is provided on one side of the movable frame (13). The output end of the drive motor (14) is connected to the threaded screw (15). A movable block (16) is provided on the surface of the threaded screw (15). A cylinder (17) and a connecting assembly (18) are provided at the bottom of the movable block (16). The connecting assembly (18) includes a connecting block (181) at the bottom of the cylinder (17). The connecting block (181) has an inner cavity (182) that is adapted to the conical cap (9). The inner wall at the bottom end of the inner cavity (182) has a directional hole. A spring (183) and a trapezoidal block (184) are installed in the directional hole. The inclined surface of the trapezoidal block (184) is flush with the inclined surface of the conical cap (9). An inner rod (185) is sleeved inside the spring (183). One end of the inner rod (185) is fixed to the trapezoidal block (184).

2. The automatic tool changer for a CNC machine tool according to claim 1, characterized in that: The movable frame (13) and the movable block (16) are internally connected by a limiting rod (19), which passes through one end of the movable frame (13) and one side of the movable block (16).

3. The automatic tool changer for a CNC machine tool according to claim 1, characterized in that: The surface of the cutting tool (6) is provided with a U-shaped groove (20) that is adapted to the U-shaped clamp (5), and the depth of the U-shaped groove (20) is greater than the clamping height of the U-shaped clamp (5).

4. The automatic tool changer for a CNC machine tool according to claim 1, characterized in that: The inclined surface of the inverted cone cap (10) is opposite to that of the inclined surface of the trapezoidal block (184), and the bottom width of the inverted cone cap (10) is smaller than the top width of the conical cap (9).

5. The automatic tool changer for a CNC machine tool according to claim 1, characterized in that: The size of the trapezoidal block (184) is smaller than the diameter of the orifice, and the compression direction of the spring (183) coincides with the axis of the inner rod (185).

6. The automatic tool changer for a CNC machine tool according to claim 1, characterized in that: The A drive motor (11) and the B drive motor (14) are linked by a controller, and the extension and retraction stroke of the cylinder (17) covers the docking depth between the conical cap (9) and the inner cavity (182).

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