Automatic tool changer for a machine tool

Abstract

The utility model discloses a kind of automatic tool selecting device for machining machine tool, it is related to automatic tool changing technical field, including portal frame, the top of the portal frame is provided with truss, the front end of the portal frame is provided with machine tool mechanical arm, the bottom of the truss is provided with first electric push rod, the bottom of the first electric push rod is provided with servo motor, the bottom of the servo motor is provided with support plate, two clamping jaws are hingedly installed in the both ends of the support plate, two tool magazines are arranged below the support plate, and a plurality of protective tubes are arranged near the edge of the bottom of the tool magazines. The utility model is provided with a series of structures, when changing tools, only single displacement operation is needed to complete the operation of placing and taking tools, making the automatic tool selecting device of machining machine tool more efficient, and the tools are washed, the debris adhered to the bottom of the tools is removed, ensuring the cleanliness of the tools.

Description

Technical Field

[0001] This utility model relates to the field of automatic tool changing technology, specifically an automatic tool selection device for machine tools. Background Technology

[0002] Automatic tool selection devices are an important component of automated machining in machine tools. Their function is to automatically select the appropriate tool according to the program instructions during the machining process, thereby improving machining efficiency and accuracy. They enable machine tools to complete multiple machining operations in one setup, reduce the number of times parts need to be installed and positioned and reduce clamping errors, further improve machining accuracy, and expand the application range of CNC machine tools.

[0003] Existing automatic tool selectors for machine tools mostly require the removed tool to be placed down before moving again to pick it up when changing tools via the clamping structure. This requires lateral displacement to complete the tool selection, which is inefficient. Furthermore, the removed tool cannot be cleaned, and debris may stick to the bottom of the tool, potentially affecting accuracy during the next selection. Utility Model Content

[0004] The purpose of this invention is to provide an automatic tool selection device for machine tools to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic tool selection device for a machine tool, comprising a gantry frame, a truss at the top of the gantry frame, a machine tool robotic arm at the front end of the gantry frame, a first electric push rod at the bottom end of the truss, a servo motor at the bottom end of the first electric push rod, a support plate at the bottom end of the servo motor, two grippers hinged to both ends of the support plate, two tool magazines below the support plate, several protective cylinders arranged near the edges of the bottom ends of the two tool magazines, a support shaft at the middle of the bottom end of the tool magazine, a support base on the outer surface of the support shaft, and several high-pressure nozzles arranged at the top of the support bases passing below the protective cylinders.

[0006] Preferably, the two sets of grippers are a set, and one side of each set of two grippers is hinged to both sides of the support plate and a second electric push rod is installed. The two sets of grippers are driven by the second electric push rod to open and close at both ends of the support plate, and to place and retrieve tools on the top of the two tool magazines respectively.

[0007] Preferably, the bottom of the support base is provided with several feet, the bottom of the support shaft extends out of the support base, the extended end of the support shaft is provided with a stepper motor, the feet support the support base, the stepper motor contains a reducer, when the stepper motor runs, the reducer drives the support shaft to rotate at a certain angle, so that the tool placed on the top of the tool magazine is transported to the predetermined position.

[0008] Preferably, a plurality of guide tubes are provided at the top of the support base outside the plurality of high-pressure nozzles, a drain pipe is provided through the bottom of the support base, and a water supply pipe is provided on one side of the support base. The water supply pipe delivers the cleaning fluid to the input end of the plurality of high-pressure nozzles, and the blades are rinsed by the high-pressure nozzles. The rinsed cleaning fluid will fall into the guide tubes and the support base, and then be discharged by the drain pipe.

[0009] Preferably, the top of the gantry is slidably connected to the bottom of the truss via a guide rail. The truss moves linearly at the top of the gantry, driving the support plate to move so that it can be positioned at the top of the two tool magazines to perform tool retrieval or tool placement. After tool retrieval is completed, the support plate will move via the guide rail to the bottom of the machine tool's robotic arm for tool loading.

[0010] Preferably, the protective cylinders are columnar components with openings at the top and bottom. The protective cylinders protect the bottom of the tool, while the high-pressure nozzles can spray cleaning fluid upwards to rinse the bottom of the tool inside the protective cylinders, preventing debris from sticking to the tool surface.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This automatic tool selector for machine tools uses two tool magazines and a support plate. Both ends of the support plate are equipped with grippers. During tool changing, the gripper at one end of the support plate removes the tool from the bottom of the machine tool's robotic arm and then transports it to an empty position in one of the tool magazines. At the same time, the gripper at the other end of the support plate removes the corresponding tool from the other tool magazine. The removed tool is then installed at the bottom of the machine tool's robotic arm. During tool changing, only a single displacement operation is needed to complete the tool placement and retrieval operations, making the tool changing efficiency of the automatic tool selector for machine tools higher.

[0013] 2. This automatic tool selector for machine tools uses a protective cylinder at the bottom of the tool magazine and a high-pressure nozzle corresponding to the protective cylinder to rinse the replaced tools, causing the debris adhering to the bottom of the tools to fall off and ensuring that the tools are in a clean state. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure and tool selection state of this utility model;

[0015] Figure 2This is a schematic diagram of the overall structure of this utility model in the tool-mounted state;

[0016] Figure 3 This is a schematic diagram of the gantry structure of this utility model;

[0017] Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0018] Figure 5 This is a schematic diagram of the support base structure of this utility model.

[0019] In the diagram: 1. Gantry frame; 2. First electric push rod; 3. Tool magazine; 4. Protective sleeve; 5. Support base; 6. Machine tool robotic arm; 7. Truss; 8. Support plate; 9. Servo motor; 10. Second electric push rod; 11. Gripper; 12. Support shaft; 13. Support leg; 14. Stepper motor; 15. Water supply pipe; 16. Flow guide tube; 17. High-pressure nozzle; 18. Drain pipe. Detailed Implementation

[0020] 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.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] like Figures 1 to 5As shown, this embodiment of the automatic tool selection device for a machining tool includes a gantry 1, a truss 7 at the top of the gantry 1, the truss 7 being able to move linearly at the top of the gantry 1, a machine tool robotic arm 6 at the front end of the gantry 1, and a tool fixing assembly at the bottom end of the machine tool robotic arm 6, which is an inherent component of the machining tool. A first electric push rod 2 is provided at the bottom end of the truss 7, a servo motor 9 is provided at the bottom end of the first electric push rod 2, and a support plate 8 is provided at the bottom end of the servo motor 9. The support plate 8 can be driven by the servo motor 9 to rotate 90 degrees. The first electric push rod 2 can drive the support plate 8 to move vertically linearly. Two grippers 11 are hinged to both ends of the support plate 8, which can clamp the tool and transport it through the support plate 8, facilitating tool picking, loading, and unloading operations. Below the support plate 8, there are two tool magazines 3. Several protective cylinders 4 are arranged near the bottom edge of the two tool magazines 3. A support shaft 12 is arranged in the middle of the bottom of the tool magazine 3. The support shaft 12 drives the tool magazine 3 to rotate. Several tools are placed on the top of each tool magazine 3. The bottom of the tools extends into the inside of the protective cylinder 4. Two empty spaces are reserved at the top of each tool magazine 3. When the tool magazine 3 rotates, the tool corresponding to the top of one tool magazine 3 faces the support plate 8, and the empty space at the top of the other tool magazine 3 faces the support plate 8. A support base 5 is arranged on the outer surface of the support shaft 12. Several high-pressure nozzles 17 are arranged on the top of the support base 5 below the protective cylinder 4. The top of the high-pressure nozzles 17 can spray cleaning fluid. The cleaning fluid washes the bottom of the tools inside the protective cylinder 4 to keep the tools clean.

[0023] Specifically, the two sets of grippers 11 form a group. Each group of two grippers 11 has a second electric push rod 10 hinged to one side of the support plate 8 on both sides. The two sets of grippers 11 are driven by the second electric push rod 10 to open and close at both ends of the support plate 8, respectively, to place and retrieve tools on the top of the two tool magazines 3.

[0024] Furthermore, the bottom of the support base 5 is provided with several support feet 13, the bottom of the support shaft 12 extends out of the support base 5, and the extended end of the support shaft 12 is provided with a stepper motor 14. The support feet 13 support the support base 5. The stepper motor 14 contains a reducer. When the stepper motor 14 is running, it drives the support shaft 12 to rotate at a certain angle through the reducer, so that the tool placed on the top of the tool magazine 3 is transported to the predetermined position.

[0025] Furthermore, several guide tubes 16 are provided at the top of the support base 5 outside the several high-pressure nozzles 17, and a drain pipe 18 is provided through the bottom of the support base 5. A water supply pipe 15 is provided on one side of the support base 5. The water supply pipe 15 delivers the cleaning fluid to the input end of the several high-pressure nozzles 17. The blades are rinsed by the high-pressure nozzles 17. The rinsed cleaning fluid will fall into the guide tubes 16 and the support base 5 and then be discharged by the drain pipe 18.

[0026] Furthermore, the top of the gantry 1 is slidably connected to the bottom of the truss 7 via a guide rail. The truss 7 moves linearly at the top of the gantry 1, driving the support plate 8 to move so that it can be positioned at the top of the two tool magazines 3 to perform tool retrieval or tool placement. After tool retrieval is completed, the support plate 8 will move via the guide rail to the bottom of the machine tool robotic arm 6 for tool loading.

[0027] Furthermore, several protective cylinders 4 are cylindrical components with openings at the top and bottom. The protective cylinders 4 protect the bottom of the tool, while the high-pressure nozzle 17 can spray cleaning fluid upwards to rinse the bottom of the tool inside the protective cylinders 4, so that the tool surface will not stick or break.

[0028] The usage method of this embodiment is as follows: When the machine tool robotic arm 6 needs to change tools, the truss 7 drives the support plate 8 to move towards the machine tool robotic arm 6. Then, the first electric push rod 2 drives the support plate 8 to descend, and the servo motor 9 drives the support plate 8 to rotate, so that the two grippers 11 at one end of the support plate 8 are below the machine tool robotic arm 6. Then, the first electric push rod 2 pulls the support plate 8 to rise, clamping the tool at the bottom of the machine tool robotic arm 6 through the grippers 11. The machine tool robotic arm 6 releases the tool, and then the first electric push rod 2 pushes the support plate 8 to make the tool leave the machine tool robotic arm 6. Then, the truss 7 drives the support plate 8 away from the machine tool robotic arm 6, and the first electric push rod 2 pulls the support plate 8 to rise, so that the bottom end of the tool is higher than the top end of the tool magazine 3. The two tool magazines 3 rotate, so that the tool corresponding to the top end of one tool magazine 3 faces the support plate 8, and the empty space at the top end of the other tool magazine 3 faces the support plate 8. Then, the servo motor 9 drives the support plate 8 to rotate, so that the removed tool faces the empty space, and the other end of the support plate 8 faces the position of the tool to be picked up. When the support plate When tool 8 moves to the top of tool magazine 3, the first electric push rod 2 drives the support plate 8 to descend, placing the removed tool in the empty space. The other end of the support plate 8 is used to clamp another tool placed on top of tool magazine 3 via gripper 11. After clamping, the first electric push rod 2 pulls the support plate 8 upward, and the servo motor 9 drives the support plate 8 to rotate, so that the clamped tool faces the machine tool arm 6. The truss 7 drives the support plate 8 to move towards the machine tool arm 6. After moving away from tool magazine 3, the first electric push rod 2 pushes the support plate 8 downward, so that the top of the removed tool is lower than the bottom of the machine tool arm 6. When the truss 7 drives the support plate 8 so that the tool is directly below the machine tool arm 6, the first electric push rod 2 pulls the support plate 8 to install the top of the tool on the bottom of the machine tool arm 6, completing the tool loading. After the tool loading is completed, the support plate 8 is moved away from the machine tool arm 6. When the tool is removed and placed on top of tool magazine 3, the top of the high-pressure nozzle 17 can spray cleaning fluid. The cleaning fluid rinses the bottom of the tool inside the protective cylinder 4, keeping the tool clean.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic tool selection device for a machine tool, comprising a gantry (1), characterized in that: The top of the gantry (1) is provided with a truss (7), the front end of the gantry (1) is provided with a machine tool robotic arm (6), the bottom end of the truss (7) is provided with a first electric push rod (2), the bottom end of the first electric push rod (2) is provided with a servo motor (9), the bottom end of the servo motor (9) is provided with a support plate (8), both ends of the support plate (8) are hinged with two grippers (11), two tool magazines (3) are provided below the support plate (8), several protective cylinders (4) are arranged near the edge of the bottom end of the two tool magazines (3), a support shaft (12) is provided at the middle of the bottom end of the tool magazine (3), a support base (5) is provided on the outer surface of the support shaft (12), and several high-pressure nozzles (17) are arranged on the top of the support bases (5) below the protective cylinders (4).

2. The automatic tool selector for a machine tool according to claim 1, characterized in that: The two sets of grippers (11) form a set, and one side of each set of two grippers (11) is hinged to both sides of the support plate (8) and a second electric push rod (10) is installed.

3. The automatic tool selection device for machine tools according to claim 1, characterized in that: The bottom end of the support base (5) is provided with several support feet (13), the bottom of the support shaft (12) extends out of the support base (5), and the extended end of the support shaft (12) is provided with a stepper motor (14).

4. The automatic tool selection device for machine tools according to claim 1, characterized in that: A plurality of guide tubes (16) are provided on the top of the support base (5) outside the plurality of high pressure nozzles (17), a drain pipe (18) is provided through the bottom of the support base (5), and a water supply pipe (15) is provided on one side of the support base (5).

5. The automatic tool selection device for machine tools according to claim 1, characterized in that: The top of the gantry (1) is slidably connected to the bottom of the truss (7) via a guide rail.

6. The automatic tool selection device for machine tools according to claim 1, characterized in that: Several of the protective cylinders (4) are columnar components with openings at the top and bottom.

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