Tool changing mechanism of numerical control machine tool

Abstract

The tool changing mechanism of the numerical control machine tool comprises a machine tool spindle and a tool bin arranged on one side of the machine tool spindle, a cutter head of a semicircular structure is arranged on the side, close to the machine tool spindle, of the tool bin and located below the machine tool spindle, and tool bits are arranged in the cutter head and at the bottom of the machine tool spindle. The tool bits at the bottom of the machine tool spindle are connected with the machine tool spindle through two symmetrically-arranged bolts, the tool bits in the cutterhead are inserted into the cutterhead, a movable plate is arranged at the bottom of the cutterhead, an air cylinder is arranged at the top of the movable plate and located below the machine tool spindle, and the top of a piston rod of the air cylinder is fixedly connected with a supporting frame of a U-shaped structure. A mounting plate is fixedly connected to the top of the supporting frame, and two disassembling and assembling assemblies used for disassembling and assembling bolts are symmetrically arranged on the top of the mounting plate. Through the structure, rapid and stable tool replacement can be achieved, the automation degree is high, the machining efficiency and flexibility of a machine tool can be improved, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, in particular to a tool changing mechanism of a numerical control machine tool. Background Art

[0002] The tool changing system of a CNC machine tool is a crucial component in modern manufacturing. Its primary function is to enable the rapid replacement of different tools to accommodate diverse processing needs. With the increasing complexity of machining processes and the increasing demands for production efficiency, traditional manual tool changing methods are no longer able to meet the requirements for efficient and precise production.

[0003] In the prior art, after searching, it was found that a Chinese patent disclosed "a tool changing mechanism for a CNC lathe", and its application number is "202223208024.5". The above patent mainly includes a U-shaped plate and a tool holder. The top of the tool holder is threaded with a number of fixing bolts. The U-shaped plate is movably connected to the tool holder. A horizontal plate is fixed on one side of the U-shaped plate. The inside of the horizontal plate is slidably connected to a sliding column, and the top of the sliding column is fixed with a top plate. Although the rising utility model can automatically tighten and remove the bolts on the tool holder by driving a motor and a tightening sleeve, there is no need for the staff to use a wrench to remove and install, which greatly reduces the time required for installation and improves the efficiency of tool changing. However, when changing the tool, the above utility model needs to perform a series of operations such as adsorption of the tool head, grip operation, lifting of the top plate, placement of the pad and operation of the control button, which increases the complexity of the operation and has a low degree of automation. It is not conducive to quickly completing the tool changing work and reduces the efficiency of tool changing. Therefore, the present utility model provides a tool changing mechanism for a CNC machine tool to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a tool changing mechanism for a CNC machine tool. The cutter head is connected to the machine tool spindle by bolts, and the connection is stable and easy to disassemble and assemble. A cutter disc, a cylinder and a disassembly and assembly component for disassembling and assembling bolts are provided, so that fast and stable tool replacement can be achieved. The degree of automation is high, which is beneficial to improving the processing efficiency and flexibility of the machine tool and has strong practicality.

[0005] To achieve the above-mentioned purpose, a tool changing mechanism of a CNC machine tool is provided, comprising a machine tool spindle and a tool magazine arranged on one side of the machine tool spindle, wherein a semicircular cutter disc is provided on the side of the tool magazine close to the machine tool spindle and below the machine tool spindle, and cutter heads are provided inside the cutter disc and at the bottom of the machine tool spindle. The cutter heads at the bottom of the machine tool spindle are connected to the machine tool spindle by two symmetrically arranged bolts, and the cutter heads inside the cutter disc are all inserted into the cutter disc, and a movable plate is provided at the bottom of the cutter disc, and a cylinder is provided at the top of the movable plate and below the machine tool spindle, and the top of the cylinder piston rod is fixedly connected to a support frame with a U-shaped structure, and the top of the support frame is fixedly connected to a mounting plate, and two disassembly and assembly components for disassembling and assembling bolts are symmetrically provided on the top of the mounting plate.

[0006] According to the tool changing mechanism of a CNC machine tool, the disassembly and assembly assembly includes a third motor fixedly connected to the top of the mounting plate, a sleeve fixedly connected to the top of the output shaft of the third motor, and a clamping block fixedly connected to the inner surface of the bottom of the sleeve. The heads of the bolts are provided with a slot that cooperates with the clamping block, and a through slot is opened inside the tool disc and is arranged opposite to the bolt in the upper and lower directions.

[0007] According to the tool changing mechanism of a CNC machine tool, the top side of the tool magazine is rotatably connected to a rotating shaft, the bottom end of the rotating shaft is fixedly connected to the top of the tool disc, the top of the tool magazine and above the rotating shaft is fixedly connected to a first motor, and the top end of the rotating shaft is fixedly connected to the output shaft of the first motor.

[0008] According to the tool changing mechanism of a CNC machine tool, a second motor is fixedly connected to the bottom of the tool magazine, and an end of the movable plate away from the cylinder is fixedly connected to the output shaft of the second motor.

[0009] According to the tool changing mechanism of a CNC machine tool, two telescopic rods are symmetrically installed between the movable plate and the mounting plate.

[0010] According to the tool changing mechanism of a CNC machine tool, the height of the sleeve is greater than the thickness of the bolt head, and a baffle is fixedly connected to the side of the cutter disc close to the rotating shaft.

[0011] The utility model has the following beneficial effects:

[0012] Compared with the existing technology, the tool changing mechanism of this CNC machine tool has a tool head connected to the machine tool spindle by bolts. The connection is stable and easy to disassemble and assemble. The tool disc, cylinder and disassembly and assembly components for disassembling and assembling bolts are provided to achieve fast and stable tool replacement. It has a high degree of automation, is conducive to improving the processing efficiency and flexibility of the machine tool, and is highly practical.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model is further explained below in combination with the drawings and embodiments.

[0015] Figure 1 It is a top view structural schematic drawing of the tool changing mechanism of the numerical control machine tool in the tool changing preparation state of the utility model;

[0016] Figure 2 It is a bottom view structural schematic drawing of the tool changing mechanism of the numerical control machine tool in the tool changing preparation state of the utility model;

[0017] Figure 3 It is a bottom view structural schematic drawing of the tool changing mechanism of the numerical control machine tool in the tool changing state of the utility model;

[0018] Figure 4 It is a bottom view structural schematic drawing of the tool changing mechanism of the numerical control machine tool in the tool changing state of the utility model; Figure 3

[0019] Figure 5 It is an enlarged structural schematic drawing of the A place of the tool changing mechanism of the numerical control machine tool of the utility model; Figure 4

[0020] Figure 6 It is a structural schematic drawing of the machine tool spindle, tool head and bolt of the tool changing mechanism of the numerical control machine tool of the utility model;

[0021] Figure 7 It is a structural schematic drawing of the third motor, sleeve and clamping block of the tool changing mechanism of the numerical control machine tool of the utility model.

[0022] Legend:

[0023] 1, tool bin; 2, tool disc; 3, machine tool spindle; 4, rotating shaft; 5, first motor; 6, second motor; 7, movable plate; 8, air cylinder; 9, tool head; 10, baffle; 11, third motor; 12, sleeve; 13, clamping block; 14, bolt; 15, support frame; 16, mounting plate; 17, through slot; 18, telescopic rod. DETAILED DESCRIPTION

[0024] This part will describe the specific embodiments of the utility model in detail, the preferred embodiments of the utility model are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and overall technical scheme of the utility model, but it cannot be understood as the limitation of the protection scope of the utility model.

[0025] Reference Figures 1-7 ​​The present invention provides a tool changing mechanism for a CNC machine tool, comprising a machine spindle 3 and a tool magazine 1 disposed on one side of the machine spindle 3. A semicircular cutterhead 2 is disposed on the tool magazine 1, located below and near the machine spindle 3. Cutter heads 9 are disposed within the cutterhead 2 and at the bottom of the machine spindle 3. The cutter head 9 at the bottom of the machine spindle 3 is connected to the machine spindle 3 via two symmetrically arranged bolts 14, ensuring stability during machining. The cutter heads 9 within the cutterhead 2 are all plugged into the cutterhead 2, facilitating quick replacement. A movable plate 7 is provided at the bottom of the cutter disc 2, and a cylinder 8 is provided at the top of the movable plate 7 and below the machine tool spindle 3. The top of the piston rod of the cylinder 8 is fixedly connected to a U-shaped support frame 15, and the top of the support frame 15 is fixedly connected to a mounting plate 16. Two disassembly and assembly components for disassembling and assembling bolts 14 are symmetrically provided on the top of the mounting plate 16. The disassembly and assembly components include a third motor 11 fixedly connected to the top of the mounting plate 16, a sleeve 12 fixedly connected to the top of the output shaft of the third motor 11, and a clamping block 13 fixedly connected to the inner surface of the bottom of the sleeve 12. The heads of the bolts 14 are provided with a slotted groove that cooperates with the clamping block 13. A through slot 17 is provided inside the cutter disc 2 and is arranged opposite to the bolt 14 up and down.

[0026] When the cutter head 9 needs to be replaced, the machine spindle 3 moves to the tool-changing position above the cutter disc 2. The cutter disc 2 moves the tool holder corresponding to the cutter head 9 on the machine spindle 3 to the bottom of the machine spindle 3. The machine spindle 3 moves downward to connect the cutter head 9 with the tool holder. First, the cylinder 8 drives the movable plate 7 to rise, so that the sleeve 12 moves into the through slot 17 and the block 13 is plugged into the slot of the bolt 14. The third motor 11 is started to drive the sleeve 12 and the block 13 to rotate, so that the bolt 14 can be quickly disassembled. The machine spindle 3 rises, and the cylinder 8 drives the movable plate 7 to descend, so that the sleeve 12 is located below the through slot 17. The cutter disc 2 rotates to rotate the cutter head 9 to be replaced to the bottom of the machine spindle 3. The bottom of the machine spindle 3 contacts the cutter head 9. The cylinder 8 drives the movable plate 7 to rise, so that the sleeve 12 moves into the through slot 17 again and the bolt 14 is close to the threaded hole of the machine spindle 3. Start the third motor 11, drive the sleeve 12 and the block 13 to rotate, and quickly tighten the bolt 14 to complete the tool change. This can achieve fast and stable tool replacement, which is beneficial to improving the processing efficiency and flexibility of the machine tool and is highly practical.

[0027] First, the second motor 6 drives the movable plate 7 to rise, so that the disassembly assembly is aligned with the bolt 14. Then, the third motor 11 is started to drive the sleeve 12 and the clamping block 13 to rotate, and the bolt 14 is quickly disassembled through the cooperation of the clamping block 13 and the T-shaped slot at the head of the bolt 14. After disassembly is completed, the first motor 5 drives the cutter head 2 to rotate, and the cutter head 9 to be replaced is rotated to below the machine tool spindle 3. Then, the second motor 6 and the third motor 11 are used again to install the new cutter head 9 to the bottom of the machine tool spindle 3. Finally, the movable plate 7 is driven to descend by the air cylinder 8, and the whole tool changing process is completed

[0028] In order to facilitate the rotation of the cutter head 2, the top side of the tool magazine 1 is rotatably connected with a rotating shaft 4, the bottom end of the rotating shaft 4 is fixedly connected with the top of the cutter head 2, the top of the tool magazine 1 and above the rotating shaft 4 is fixedly connected with the first motor 5, the top end of the rotating shaft 4 is fixedly connected with the output shaft of the first motor 5, and the bottom of the tool magazine 1 is fixedly connected with the second motor 6. One end of the movable plate 7 away from the air cylinder 8 is fixedly connected with the output shaft of the second motor 6.

[0029] The tool magazine 1 is installed on one side of the machining space of the numerical control machine tool, when tool changing is needed, the machine tool spindle 3 moves to the tool changing position, the first motor 5 and the second motor 6 operate to drive the cutter head 2 and the movable plate 7 to rotate to the outside of the tool magazine 1, and subsequent tool changing work is carried out. After tool changing is completed, the first motor 5 and the second motor 6 operate to drive the cutter head 2 and the movable plate 7 to rotate to the inside of the tool magazine 1 for storage, so that the normal machining space of the numerical control machine tool is ensured, and the use effect is good.

[0030] In order to ensure the stability of the movable plate 7 during movement, two telescopic rods 18 are symmetrically installed between the movable plate 7 and the mounting plate 16. The height of the sleeve 12 is greater than the thickness of the head of the bolt 14, so as to ensure that the disassembled bolt 14 is stably located in the sleeve 12. The side of the cutter head 2 close to the rotating shaft 4 is fixedly connected with a baffle 10, and after the cutter head 2 is moved to the inside of the tool magazine 1 for storage by the rotation of the rotating shaft 4, the baffle 10 plays a blocking and protecting role, so as to reduce the splashing of the debris generated during the machining of the machine tool spindle 3 to the cutter head 9.

[0031] Working Principle: When the cutter head 9 needs to be replaced, the machine spindle 3 moves to the tool-changing position above the cutterhead 2. The cutterhead 2 moves the tool holder corresponding to the cutter head 9 on the machine spindle 3 to the bottom of the machine spindle 3. The machine spindle 3 then moves downward to connect the cutter head 9 with the tool holder. First, the cylinder 8 drives the movable plate 7 upward, causing the sleeve 12 to move into the through slot 17 and the clamping block 13 to engage with the slotted bolt 14. The third motor 11 is started, driving the sleeve 12 and the clamping block 13 to rotate, enabling the bolt 14 to be quickly removed. The machine spindle 3 rises, and the cylinder 8 drives the movable plate 7 downward, causing the sleeve 12 to be located below the through slot 17. The cutterhead 2 rotates to rotate the cutter head 9 to the bottom of the machine spindle 3. The bottom of the machine spindle 3 contacts the cutter head 9. The cylinder 8 drives the movable plate 7 upward, causing the sleeve 12 to move into the through slot 17 again and the bolt 14 to approach the threaded hole of the machine spindle 3. Start the third motor 11, drive the sleeve 12 and the block 13 to rotate, and quickly tighten the bolt 14 to complete the tool change. This can achieve fast and stable tool replacement, which is beneficial to improving the processing efficiency and flexibility of the machine tool and is highly practical.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A tool changing mechanism for a CNC machine tool, characterized in that: The invention comprises a machine tool spindle (3) and a tool magazine (1) arranged on one side of the machine tool spindle (3); a semicircular cutter disc (2) is provided on the tool magazine (1) close to one side of the machine tool spindle (3) and located below the machine tool spindle (3); a cutter head (9) is provided inside the cutter disc (2) and at the bottom of the machine tool spindle (3); the cutter head (9) at the bottom of the machine tool spindle (3) is connected to the machine tool spindle (3) through two symmetrically arranged bolts (14); the cutter heads (9) inside the cutter disc (2) are all plugged into the cutter disc (2); a movable plate (7) is provided at the bottom of the cutter disc (2); a cylinder (8) is provided at the top of the movable plate (7) and located below the machine tool spindle (3); a U-shaped support frame (15) is fixedly connected to the top of the support frame (15); a mounting plate (16) is fixedly connected to the top of the mounting plate (16); two disassembly and assembly components for disassembling and assembling the bolts (14) are symmetrically provided on the top of the mounting plate (16).

2. The tool changing mechanism of a CNC machine tool according to claim 1, characterized in that: The disassembly and assembly assembly comprises a third motor (11) fixedly connected to the top of the mounting plate (16), a sleeve (12) fixedly connected to the top of the output shaft of the third motor (11), and a clamping block (13) fixedly connected to the inner surface of the bottom of the sleeve (12). The heads of the bolts (14) are provided with a slot for mating with the clamping block (13), and a through slot (17) is provided inside the cutter head (2) and is arranged opposite to the bolt (14) in the upper and lower directions.

3. The tool changing mechanism of a CNC machine tool according to claim 2, characterized in that: The top side of the tool magazine (1) is rotatably connected to a rotating shaft (4), the bottom end of the rotating shaft (4) is fixedly connected to the top of the cutter disc (2), the top of the tool magazine (1) and located above the rotating shaft (4) is fixedly connected to a first motor (5), and the top end of the rotating shaft (4) is fixedly connected to the output shaft of the first motor (5).

4. The tool changing mechanism of a CNC machine tool according to claim 3, characterized in that: The bottom of the tool magazine (1) is fixedly connected to a second motor (6), and one end of the movable plate (7) away from the cylinder (8) is fixedly connected to the output shaft of the second motor (6).

5. The tool changing mechanism of a CNC machine tool according to claim 4, characterized in that: Two telescopic rods (18) are symmetrically installed between the movable plate (7) and the mounting plate (16).

6. The tool changing mechanism of a CNC machine tool according to claim 5, characterized in that: The height of the sleeve (12) is greater than the thickness of the head of the bolt (14), and a baffle (10) is fixedly connected to one side of the cutter head (2) close to the rotating shaft (4).

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