Tool changing device of numerical control machining center

Abstract

The utility model relates to the field of numerical control machining equipment, in particular to a tool changing device of a numerical control machining center, which comprises a rotating component, a swing telescopic component and a hanging bracket component. The swing telescopic assembly is provided with a plurality of multi-section telescopic cylinders, a plurality of deflection driving cylinders and a plurality of clamping pieces. The multiple multi-section telescopic cylinders and the deflection driving cylinders are arranged in an annular array mode and hinged to the periphery of the rotating assembly. The deflection driving cylinder is used for driving the multi-section telescopic cylinders to swing, so that all the multi-section telescopic cylinders are in a vertical state, and cutters clamped on the clamping pieces are stored in a suspended manner; in addition, the multi-section telescopic cylinder closest to the machining center spindle needing tool changing can swing downwards to be in a horizontal state, then the multi-section telescopic cylinder extends outwards to transfer the tool on the corresponding clamping piece to the spindle for tool changing, the structure is simple, occupied space can be reduced, the equipment cost can be reduced, and operation convenience can be improved.

Description

Technical Field

[0001] The utility model relates to the field of numerical control machining equipment, in particular to a tool changing device for a numerical control machining center. Background Art

[0002] There are many ways to change tools in CNC machining centers. Considering the need for frequent tool changes and improving tool change efficiency, most CNC machining centers are currently equipped with tool changing devices for automatic tool change. Some automatic tool changing methods involve setting up a robot to transfer the tool from the tool magazine to the spindle of the machining center, while others achieve tool change through relative movement between the tool magazine and the spindle. Setting up a robot often requires a larger avoidance space, which squeezes the already limited space inside the CNC machining center and makes it inconvenient to operate, or makes the equipment larger, which increases the manufacturing cost of the equipment; moving through the tool magazine or spindle will cause impact due to the gravitational inertia of the tool magazine or spindle during movement. Frequent movement will aggravate the wear of the motion mechanism and affect the accuracy and life of the equipment. In view of this, it is necessary to improve the tool changing device of the CNC machining center. Utility Model Content

[0003] In order to overcome the deficiencies in the prior art, the utility model discloses a tool changing device for a CNC machining center, comprising a rotating assembly, a swinging telescopic assembly and a hanger assembly. The rotating assembly is suspended and rotatably connected to the bottom of the hanger assembly. The swinging telescopic assembly is provided with a plurality of multi-section telescopic cylinders and a plurality of yaw drive cylinders hinged on one side of the plurality of multi-section telescopic cylinders and a plurality of clamping members fixed to the ends of the plurality of multi-section telescopic cylinders and capable of clamping the cutting tools. The plurality of multi-section telescopic cylinders and the plurality of yaw drive cylinders are arranged in a circular array and hinged around the rotating assembly. The yaw drive cylinders can drive the corresponding multi-section telescopic cylinders to swing and can make the multi-section telescopic cylinders be in an upright state or a horizontal state. The utility model improves the tool changing device of the CNC machining center, and uses the yaw drive cylinder to drive the corresponding multi-section telescopic cylinders with clamping parts to swing, so that all the multi-section telescopic cylinders can be in an upright state and the tools clamped on the clamping parts can be stored in the air; the multi-section telescopic cylinder closest to the main spindle of the machining center where the tool needs to be changed can be swung downward to a horizontal state, and then the multi-section telescopic cylinder is extended outward to transfer the tool on its corresponding clamping part to the main spindle for tool changing. The utility model has a simple structure and can reduce space occupancy, thereby reducing equipment costs and improving operational convenience.

[0004] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0005] A tool changing device for a CNC machining center is characterized in that it includes a rotating assembly, a swinging telescopic assembly and a hanger assembly, the rotating assembly is provided with a rotatable hanger and a circular plate body fixed to the hanger, the rotating assembly is hung and rotatably connected to the bottom of the hanger assembly, the swinging telescopic assembly is provided with a plurality of telescopic members and a plurality of yaw driving members that can drive the plurality of telescopic members to swing, the plurality of telescopic members correspond to the plurality of yaw driving members one by one and the yaw driving members are hinged to one side of the telescopic members, a clamping member is provided at the end of each telescopic member, the clamping member can clamp the tool, the plurality of telescopic members and the plurality of yaw driving members of the swinging telescopic assembly are respectively arranged in a circular array around the rotating assembly and are hinged to the rotating assembly, the yaw driving member can drive its corresponding telescopic member to swing and can make the telescopic member be in an upright state or a flat state.

[0006] The rotating assembly includes a first circular plate, a second circular plate, a rotating boom and a motor. The first circular plate and the second circular plate are both circular flat plates. The first circular plate and the second circular plate are respectively fixed to the bottom and the middle of the rotating boom. The rotating boom is a circular rod with a shoulder on the upper part. The center line of the rotating boom is coaxial with the center line of the first circular plate and the second circular plate. The output end of the motor is connected to the top of the rotating boom.

[0007] Furthermore, the motor is a servo motor with a brake.

[0008] The swing telescopic assembly includes a multi-section telescopic cylinder and a yaw drive cylinder. The multi-section telescopic cylinder is a multi-section telescopic electric push rod. The yaw drive cylinder is a telescopic electric push rod. The multi-section telescopic cylinder and the yaw drive cylinder are each composed of several pieces. The several multi-section telescopic cylinders correspond one-to-one to the several yaw drive cylinders. The several multi-section telescopic cylinders are arranged in a circular array on the first circular plate. The cylinder bodies of the multi-section telescopic cylinders are hinged on the first circular plate. The several yaw drive cylinders are arranged in a circular array on the periphery of the second circular plate. The cylinder bodies of the yaw drive cylinders are hinged on the second circular plate. The cylinder rods of the yaw drive cylinders are hinged on one side of the cylinder bodies of the corresponding multi-section telescopic cylinders.

[0009] The swinging telescopic assembly also includes a clamping piece, which is an electric or pneumatic double-claw clamping component, whose double claws can open and close and can clamp the tool handle. The clamping piece is composed of several pieces, and the several clamping pieces correspond one-to-one to the several multi-stage telescopic cylinders. The clamping pieces are fixedly connected to the front end of the cylinder rod of each corresponding multi-stage telescopic cylinder.

[0010] The hanger assembly includes a hanging frame and a bearing group. The hanging frame is a frame-shaped frame with a top plate and a bottom plate. The bearing group includes thrust bearings and radial bearings arranged up and down. The bearing group is embedded in a through hole set in the center of the bottom plate of the hanging frame. The top plate of the hanging frame is used to connect with the body of the CNC machining center.

[0011] The rotating suspension rod of the rotating assembly is rotatably connected to the hanging frame of the hanger assembly through a bearing group. The rotating suspension rod can rotate relative to the hanging frame but cannot move up and down.

[0012] As can be seen from the above description, the tool changing device for a CNC machining center provided by the present invention has the following advantages: a swing telescopic assembly having a plurality of multi-section telescopic cylinders, a plurality of yaw drive cylinders, and a plurality of clamping members is integrated into a rotatable rotating assembly, the plurality of multi-section telescopic cylinders and the plurality of yaw drive cylinders are arranged in a circular array and hinged around the rotating assembly, and the yaw drive cylinders are used to drive the corresponding multi-section telescopic cylinders with clamping members to swing, so that all multi-section telescopic cylinders can be in an upright state and the tools clamped on the clamping members can be stored in the air; the multi-section telescopic cylinder closest to the machining center spindle that needs tool change can also be swung downward to a horizontal state, and then the multi-section telescopic cylinder is used to extend outward to transfer the tool on its corresponding clamping member to the spindle for tool change. The structure is simple and can reduce space occupation. It does not require an independent robot arm and does not require lateral movement of the tool magazine or spindle. By improving the tool changing device of a CNC machining center, the present invention can reduce equipment costs, improve operational convenience, and increase the service life of the equipment. The utility model has reasonable design, simple structure, low cost and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a general schematic diagram of a tool changing device for a CNC machining center according to the present invention;

[0014] Figure 2 for Figure 1 AA enlarged schematic diagram in;

[0015] Figure 3 is an enlarged schematic diagram of the rotating component;

[0016] Figure 4 It is an enlarged schematic diagram of the swing telescopic assembly;

[0017] Figure 5 is an enlarged schematic diagram of the hanger assembly;

[0018] Figure 6 It is a schematic diagram of a multi-section telescopic cylinder swinging downward to a horizontal position with the cylinder rod extended.

[0019] Reference numerals:

[0020] 1 Rotating assembly; 11 First circular plate; 12 Second circular plate; 13 Rotating boom; 14 Motor; 2 Swinging telescopic assembly; 21 Multi-stage telescopic cylinder; 22 Yaw drive cylinder; 23 Clamping piece; 3 Hanger assembly; 31 Hoisting frame; 32 Bearing assembly; 900 tool. DETAILED DESCRIPTION

[0021] The present invention is further described below through specific implementation methods.

[0022] like Figure 1 、 Figure 2 and Figure 6 As shown, the tool changing device of a CNC machining center described in the utility model includes a rotating component 1, a swinging telescopic component 2 and a hanger component 3. The rotating component 1 is provided with a rotatable hanger and a circular plate fixed to the hanger. The rotating component 1 is hung and rotatably connected to the bottom of the hanger component 3. The swinging telescopic component 2 is provided with a plurality of telescopic members and a plurality of yaw driving members that can drive the plurality of telescopic members to swing. The plurality of telescopic members correspond to the plurality of yaw driving members one by one and the yaw driving members are hinged to one side of the telescopic members. A clamping member is provided at the end of each telescopic member, which can clamp the tool 900. The plurality of telescopic members and the plurality of yaw driving members of the swinging telescopic component 2 are respectively arranged in a circular array around the rotating component 1 and are hinged to the rotating component 1. The yaw driving member can drive the corresponding telescopic member to swing and can make the telescopic member stand upright or in a horizontal state.

[0023] like Figure 1 、 Figure 2 and Figure 3 As shown, the rotating assembly 1 described in the utility model includes a first circular plate 11, a second circular plate 12, a rotating boom 13 and a motor 14. The first circular plate 11 and the second circular plate 12 are both circular flat plates. The first circular plate 11 and the second circular plate 12 are respectively fixed to the bottom and the middle of the rotating boom 13. The rotating boom 13 is a circular rod with a shoulder on the upper part. The center line of the rotating boom 13 is coaxial with the center line of the first circular plate 11 and the second circular plate 12. The output end of the motor 14 is connected to the top of the rotating boom 13. The motor 14 is a servo motor with a brake.

[0024] like Figures 1 to 4As shown, the swing telescopic assembly 2 described in the present invention includes a multi-section telescopic cylinder 21, a yaw drive cylinder 22 and a clamping member 23. The multi-section telescopic cylinder 21 is a multi-section telescopic electric push rod, and the yaw drive cylinder 22 is a telescopic electric push rod. The multi-section telescopic cylinder 21 and the yaw drive cylinder 22 are each composed of several pieces, and the several multi-section telescopic cylinders 21 correspond one-to-one to the several yaw drive cylinders 22. The several multi-section telescopic cylinders 21 are arranged in a circular array on the first circular plate 11, and the cylinder bodies of the multi-section telescopic cylinders 21 are hinged on the first circular plate 11. The several yaw drive cylinders 22 are arranged in a circular array on the periphery of the second circular plate 12, and the cylinder bodies of the yaw drive cylinders 22 are hinged on the second circular plate 12. The cylinder rods of the yaw drive cylinders 22 are hinged on one side of the cylinder bodies of the corresponding multi-section telescopic cylinders 21. The clamping member 23 is an electric or pneumatic double-claw clamping component, whose double claws can be opened and closed and can clamp the shank of the tool 900. The clamping member 23 of this embodiment is a pneumatic double-claw clamp. The clamping member 23 is a plurality of pieces, and the plurality of clamping members 23 corresponds one-to-one to the plurality of multi-stage telescopic cylinders 21. The clamping member 23 is fixedly connected to the front end of the cylinder rod of each corresponding multi-stage telescopic cylinder 21.

[0025] like Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown, the hanger assembly 3 of the present invention includes a hanging frame 31 and a bearing assembly 32. The hanging frame 31 is a frame-shaped frame with a top plate and a bottom plate. The bearing assembly 32 includes a thrust bearing and a radial bearing arranged above and below. The bearing assembly 32 is embedded in a through hole provided in the center of the bottom plate of the hanging frame 31. The top plate of the hanging frame 31 is used to connect to the main body of the CNC machining center. The rotating hanger 13 of the rotating assembly 1 is rotatably connected to the hanging frame 31 of the hanger assembly 3 by the bearing assembly 32. The rotating hanger 13 can rotate relative to the hanging frame 31 but cannot move up and down.

[0026] This tool changing device is mounted on the main body of a CNC machining center and positioned appropriately on one side of the center's spindle. The execution of the tool changing device's rotating assembly 1 and swinging telescopic assembly 2 can be centrally controlled by the center's control system. Before use, all multi-stage telescopic cylinders 21 are commanded to swing upward so that they are all in an upright position. Several tools 900 to be used are then clamped and stored by several clamping members 23. If the center's spindle requires a tool change, the control system commands the rotating assembly 1 to rotate, causing the multi-stage telescopic cylinder 21 corresponding to the tool 900 to be replaced to rotate to the position closest to the center's spindle. The corresponding yaw drive cylinder 22 then drives the multi-stage telescopic cylinder 21 to swing downward to a horizontal position. The multi-stage telescopic cylinder 21 is then commanded to extend outward, transferring the tool 900 on the clamping member 23 to the spindle for tool change. After the tool change is complete, the multi-stage telescopic cylinder 21 is commanded to retract and swing upward to an upright position.

[0027] The present invention improves the tool changing device of a CNC machining center, and integrates a swing telescopic assembly 2 provided with a plurality of multi-section telescopic cylinders 21, a plurality of yaw drive cylinders 22 and a plurality of clamping members 23 on a rotatable rotating assembly 1. The plurality of multi-section telescopic cylinders 21 and the plurality of yaw drive cylinders 22 are arranged in a circular array and are hinged on the four sides of the rotating assembly 1. The yaw drive cylinders 22 are used to drive the corresponding multi-section telescopic cylinders 21 with the clamping members 23 to swing, so that all the multi-section telescopic cylinders 21 can be in an upright state and the tool 900 clamped on the clamping member 23 can be stored in the air; the multi-section telescopic cylinder 21 closest to the main spindle of the machining center where the tool needs to be changed can also be swung downward to a horizontal state, and then the multi-section telescopic cylinder 21 can be extended outward to transfer the tool 900 on its corresponding clamping member 23 to the main spindle for tool changing. The utility model has a simple structure and can reduce space occupancy, thereby reducing equipment costs and improving operational convenience.

[0028] The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A tool changing device for a CNC machining center, characterized in that: The invention comprises a rotating assembly (1), a swing telescopic assembly (2) and a hanger assembly (3), wherein the rotating assembly (1) is provided with a rotatable hanger and a circular plate fixed on the hanger, and the rotating assembly (1) is hung and rotatably connected to the bottom of the hanger assembly (3), and the swing telescopic assembly (2) is provided with a plurality of telescopic components and a plurality of yaw drive components, wherein the plurality of telescopic components correspond to the plurality of yaw drive components one by one and the yaw drive components are hinged on one side of the telescopic components, and a clamping component is provided at the end of each telescopic component, and the clamping component can clamp the tool (900), and the plurality of telescopic components and the plurality of yaw drive components of the swing telescopic assembly (2) are respectively arranged in a circular array around the rotating assembly (1) and are hinged to the rotating assembly (1), and the yaw drive component can drive the corresponding telescopic component to swing and can make the telescopic component stand upright or be in a horizontal state.

2. The tool changing device for a CNC machining center according to claim 1, characterized in that: The rotating assembly (1) includes a first circular plate (11), a second circular plate (12), a rotating suspension rod (13) and a motor (14). The first circular plate (11) and the second circular plate (12) are both circular flat plates. The first circular plate (11) and the second circular plate (12) are respectively fixed to the bottom and the middle of the rotating suspension rod (13). The rotating suspension rod (13) is a circular rod with a shoulder at the top. The center line of the rotating suspension rod (13) is coaxial with the center line of the first circular plate (11) and the second circular plate (12). The output end of the motor (14) is connected to the top of the rotating suspension rod (13).

3. The tool changing device for a CNC machining center according to claim 2, characterized in that: The motor (14) is a servo motor with a brake.

4. The tool changing device for a CNC machining center according to claim 2, characterized in that: The swing telescopic assembly (2) includes a multi-stage telescopic cylinder (21) and a sway drive cylinder (22). The multi-stage telescopic cylinder (21) is a multi-stage telescopic electric push rod. The sway drive cylinder (22) is a telescopic electric push rod. The multi-stage telescopic cylinder (21) and the sway drive cylinder (22) are each a plurality of pieces. The plurality of multi-stage telescopic cylinders (21) correspond to the plurality of sway drive cylinders (22) one by one. The plurality of multi-stage telescopic cylinders (21) are arranged in a circular array on the first circular plate (11). The cylinder bodies of the multi-stage telescopic cylinders (21) are hinged on the first circular plate (11). The plurality of sway drive cylinders (22) are arranged in a circular array on the periphery of the second circular plate (12). The cylinder bodies of the sway drive cylinders (22) are hinged on the second circular plate (12). The cylinder rods of the sway drive cylinders (22) are hinged on one side of the cylinder bodies of the corresponding multi-stage telescopic cylinders (21).

5. The tool changing device for a CNC machining center according to claim 4, characterized in that: The swing telescopic assembly (2) further includes a clamping member (23), which is an electric or pneumatic double-claw clamping member, whose double claws can be opened and closed and can clamp the handle of the tool (900). The clamping member (23) is composed of a plurality of members, and the plurality of clamping members (23) correspond one-to-one to the plurality of multi-stage telescopic cylinders (21). The clamping member (23) is fixedly connected to the front end of the cylinder rod of each corresponding multi-stage telescopic cylinder (21).

6. The tool changing device for a CNC machining center according to claim 5, characterized in that: The hanger assembly (3) includes a hanging frame (31) and a bearing group (32). The hanging frame (31) is a frame body provided with a top plate and a bottom plate. The bearing group (32) includes a thrust bearing and a radial bearing. The bearing group (32) is embedded in a through hole provided at the center of the bottom plate of the hanging frame (31).

7. The tool changing device for a CNC machining center according to claim 6, characterized in that: The rotating suspension rod (13) of the rotating assembly (1) is rotatably connected to the hanging frame (31) of the hanging frame assembly (3) via a bearing group (32). The rotating suspension rod (13) can rotate relative to the hanging frame (31) but cannot move up and down.

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