Numerical control gantry milling tool changing device

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a numerical control gantry milling cutter changing device which comprises a fixed base, a connecting assembly is arranged at the top of the fixed base, a hoisting assembly is arranged at the top of the fixed base, the connecting assembly comprises a clamping sleeve arranged at the top of the fixed base, and a limiting structure is arranged in the clamping sleeve. The hoisting assembly comprises a first supporting base arranged at the top of the fixing base, a hoisting structure is arranged at the top of the first supporting base, the connecting assembly further comprises a third fixing rod arranged at the top of the fixing base, the limiting structure comprises a clamping groove formed in a clamping sleeve, and two sets of buckling plates are fixedly installed on the inner wall of the clamping groove; and a group of springs are fixedly mounted on the outer wall of one side of the buckle plate, so that the purpose of reinforcing the joint of the milling cutter is achieved, the connecting effect of the milling cutter is improved, the milling cutter is prevented from being separated in the milling process, the use safety of the device is improved, and the use experience of the device is optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction machinery, and specifically relates to a tool changing device for a numerically controlled gantry milling machine. Background Technique

[0002] An automatic tool changing device for numerically controlled milling machine production, with the publication number CN216138187U, relates to the field of construction machinery, including a mounting frame, on which a gantry is slidably fitted. A horizontal sliding assembly and a tool changing assembly are arranged on the gantry. The horizontal sliding assembly includes a sliding block, on which a cutter mounting plate is slidably fitted. An electric cylinder is arranged on the cutter mounting plate, and a cutter is connected to the electric cylinder. The tool changing assembly includes a motor, which is connected to a disc. A number of milling cutter placement cavities are circumferentially and arrayedly distributed inside the disc. Electromagnets are arranged on the two side cavity walls of the milling cutter placement cavity, and milling cutters are respectively adsorbed in a number of the milling cutter placement cavities.

[0003] However, the above patent still has the following problems: During the process of tool changing for the milling cutter, the fixing effect is not good, and the connection of the milling cutter is unstable, resulting in the problem that the milling cutter is separated from the device during the milling process. There are potential safety hazards in the use of the device, and the connection mechanism of the device needs to be improved. When the pre-installed milling cutter is hoisted, the fixing method for the spare milling cutter is not good, and it is easy to cause the milling cutter to fall and be damaged. The placement structure of the device needs to be improved.

[0004] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present utility model is:

[0006] A tool changing device for a numerically controlled gantry milling machine includes a fixed base. A connection assembly is arranged on the top of the fixed base, and a hoisting assembly is arranged on the top of the fixed base. The connection assembly includes a clamping sleeve arranged on the top of the fixed base, and a limiting structure is arranged inside the clamping sleeve. The hoisting assembly includes a first support base arranged on the top of the fixed base, and a hoisting structure is arranged on the top of the first support base. The connection assembly further includes a third fixing rod arranged on the top of the fixed base.

[0007] As a preferred embodiment of the present utility model, the limiting structure includes a clamping groove opened inside the clamping sleeve. Two groups of clamping plates are fixedly installed on the inner wall of the clamping groove. A group of springs are fixedly installed on the outer wall of one side of the clamping plate, and one end of the spring extends and is fixedly connected to the inner wall of the clamping groove.

[0008] As a preferred embodiment of the present utility model, the limiting structure further includes two groups of first connecting plates fixedly installed on the outer wall of the third fixing rod. A hole is formed in the inner wall of the first connecting plate, and a second connecting plate is slidably installed in the hole. A group of first semi-circular clamping plates and a group of second semi-circular clamping plates are respectively fixedly installed at the bottoms of the two groups of second connecting plates.

[0009] As a preferred embodiment of the present utility model, the limiting structure further includes a second fixing rod arranged on the top of the fixed base. Two groups of first clamping rings are fixedly installed on the outer wall of the second fixing rod, a first clamping rod is fixedly installed at the bottom of the second fixing rod, a second clamping rod is fixedly installed at the bottom of the first clamping rod, the first clamping rod and the second clamping rod are clamped and installed inside the clamping groove, and the first clamping ring is clamped and installed between the first semi-circular clamping plate and the second semi-circular clamping plate.

[0010] As a preferred embodiment of the present utility model, the hoisting structure includes a first rotating rod rotatably installed on the top of the first support base. A first fixed circular plate is fixedly installed at the top of the first rotating rod. Eight groups of holes are formed in the top of the first fixed circular plate, and a group of second arc-shaped limiting plates are fixedly installed in each hole. A third arc-shaped limiting plate is fixedly installed inside the second arc-shaped limiting plate. Four groups of reset spring rods are fixedly installed between the second arc-shaped limiting plate and the third arc-shaped limiting plate. An arc-shaped anti-slip pad is fixedly installed on the inner wall of the third arc-shaped limiting plate.

[0011] As a preferred embodiment of the present utility model, the hoisting assembly further includes a second fixed circular plate fixedly installed on the top of the first fixed circular plate. Eight groups of first fixing rods are fixedly installed on the outer wall of the second fixed circular plate. A first arc-shaped limiting plate is fixedly installed at one end of the first fixing rod. A second connecting rod is fixedly installed at the bottom of the clamping sleeve, a first connecting rod is fixedly installed at the bottom of the second connecting rod, the second connecting rod is clamped and installed inside the first arc-shaped limiting plate, and the inner wall of the arc-shaped anti-slip pad is in close contact with the outer wall of the first connecting rod.

[0012] As a preferred embodiment of the present utility model, a first fixing plate is fixedly installed on the top of the first support base, a first servo motor is fixedly installed on the top of the first fixing plate, a rotating rod is rotatably installed between the first support base and the first fixing plate, the output shaft of the first servo motor is fixedly connected to one end of the rotating rod through a coupling, a group of belt pulleys are fixedly installed on the outer wall of the rotating rod, a group of belt pulleys are fixedly installed on the outer wall of the first rotating rod, and a transmission belt is sleeved and installed between the two groups of belt pulleys.

[0013] As a preferred embodiment of the present utility model, a second fixing plate is fixedly installed on the top of the fixed base, an electric control box is fixedly installed on the top of the fixed base, an electric control push rod is fixedly installed on the inner wall of one side of the second fixing plate, the electric control box is electrically connected to the electric control push rod, two groups of sliding grooves are formed inside the second fixing plate, a sliding plate is slidably installed between the two groups of sliding grooves, a second rotating rod is rotatably installed on the top of the sliding plate, two groups of first support plates are fixedly installed on the outer wall of the second rotating rod, a fourth fixing rod is fixedly installed on the bottom of the first support plate, and the bottom of the fourth fixing rod is fixedly connected to the top of the third fixing rod.

[0014] As a preferred embodiment of the present utility model, a second support base is fixedly installed on the top of the fixed base, a second support plate is fixedly installed on the top of the second support base, a first robotic arm is arranged on the outer wall of one side of the second support plate, a second robotic arm is arranged on the outer wall of one side of the first robotic arm, a tightening ring is fixedly installed on the outer wall of one side of the second robotic arm, a limiting sleeve is fixedly installed inside the tightening ring, an electric control box is fixedly installed on the outer wall of one side of the second robotic arm, the electric control box is electrically connected to the tightening ring, and a milling cutter is fixedly installed at the bottom of the first connecting rod.

[0015] The present utility model has the following beneficial effects compared with the prior art:

[0016] 1. The purpose of strengthening the connection of the milling cutter is achieved, the connection effect of the milling cutter is improved, the separation of the milling cutter during the milling process is prevented, the safety of the device during use is improved, and the use experience of the device is optimized.

[0017] 2. The purpose of limiting and fixing the milling cutter is achieved, the hoisting effect of the milling cutter is improved, it is convenient for the device to select the milling cutter, the convenience of the device during use is improved, and the stability of the device during use is improved.

[0018] 3. The purpose of starting the device and selecting and moving the milling cutter is achieved, the automation degree of the device is improved, the replacement efficiency of the milling cutter is improved, the processing efficiency of the device is improved, and the convenience of the device during use is improved.

[0019] The following further describes in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the drawings:

[0021] Figure 1 is the left perspective view of the present utility model;

[0022] Figure 2 is the structural schematic diagram of the first support base of the present utility model;

[0023] Figure 3 is the structural schematic diagram of the second arc-shaped limiting plate of the present utility model;

[0024] Figure 4 Schematic diagram of the second fixed circular plate structure of the present utility model;

[0025] Figure 5 Schematic diagram of the milling cutter connection of the present utility model;

[0026] Figure 6 Schematic diagram of the spring structure of the present utility model;

[0027] Figure 7 Schematic diagram of the second fixed plate structure of the present utility model;

[0028] Figure 8 Schematic diagram of the first robotic arm structure of the present utility model.

[0029] In the figure: 10, fixed base; 11, first support base; 12, first fixed plate; 13, first servo motor; 14, pulley; 15, transmission belt; 16, first rotating rod; 17, first fixed circular plate; 18, second fixed circular plate; 19, first fixed rod; 20, first arc-shaped limiting plate; 21, second arc-shaped limiting plate; 22, third arc-shaped limiting plate; 23, arc-shaped anti-slip pad; 24, reset spring rod; 25, first connecting rod; 26, second connecting rod; 27, clamping sleeve; 28, clamping groove; 29, clamping plate; 30, spring; 31, second fixed rod; 32, first clamping ring; 33, first clamping rod; 34, second clamping rod; 35, third fixed rod; 36, first connecting plate; 37, second connecting plate; 38, first semi-circular clamping plate; 39, second semi-circular clamping plate; 40, second fixed plate; 41, electric control box; 42, electric control push rod; 43, chute; 44, sliding plate; 45, second rotating rod; 46, first support plate; 47, fourth fixed rod; 48, second support base; 49, second support plate; 50, first robotic arm; 51, second robotic arm; 52, tightening ring; 53, electric control box; 54, milling cutter; 55, limiting sleeve. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model.

[0031] Embodiment 1: A tool changing device for a numerically controlled gantry milling machine, specifically as shown in Figure 1 and 5As shown, it includes a fixed base 10. A connection component is provided on the top of the fixed base 10, and a hoisting component is provided on the top of the fixed base 10. The connection component includes a clamping sleeve 27 provided on the top of the fixed base 10, and a limiting structure is provided inside the clamping sleeve 27. The hoisting component includes a first support base 11 provided on the top of the fixed base 10, and a hoisting structure is provided on the top of the first support base 11. The connection component further includes a third fixing rod 35 provided on the top of the fixed base 10. The milling cutter is connected and fixed through the connection component, and the spare milling cutter is placed in a limited position through the hoisting component.

[0032] Specifically as Figure 1 , Figure 5 and Figure 6 shown, the limiting structure includes a clamping groove 28 opened inside the clamping sleeve 27. Two groups of clamping plates 29 are fixedly installed on the inner wall of the clamping groove 28. A group of springs 30 are fixedly installed on the outer wall of one side of the clamping plate 29. One end of the spring 30 extends and is fixedly connected to the inner wall of the clamping groove 28.

[0033] Specifically as Figure 1 and Figure 5 shown, the limiting structure further includes two groups of first connecting plates 36 fixedly installed on the outer wall of the third fixing rod 35. A hole is opened on the inner wall of the first connecting plate 36, and a second connecting plate 37 is slidably installed in the hole. A group of first semi-circular clamping plates 38 and a group of second semi-circular clamping plates 39 are respectively fixedly installed at the bottoms of the two groups of second connecting plates 37. The first semi-circular clamping plate 38 and the second semi-circular clamping plate 39 are limited and fixed through the first connecting plate 36 and the second connecting plate 37.

[0034] Specifically as Figure 1 , Figure 5 and Figure 6 shown, the limiting structure further includes a second fixing rod 31 provided on the top of the fixed base 10. Two groups of first clamping rings 32 are fixedly installed on the outer wall of the second fixing rod 31. A first clamping rod 33 is fixedly installed at the bottom of the second fixing rod 31. A second clamping rod 34 is fixedly installed at the bottom of the first clamping rod 33. The first clamping rod 33 and the second clamping rod 34 are clamped and installed inside the clamping groove 28. The first clamping ring 32 is clamped and installed between the first semi-circular clamping plate 38 and the second semi-circular clamping plate 39. Push the first clamping rod 33 to push the second clamping rod 34 into the inside of the clamping groove 28. Push the clamping plate 29 to clamp and install the first clamping rod 333 inside the clamping groove 28. The first clamping rod 33 is limited inside the clamping groove 28 through the clamping plate 29 and the spring 30. The first clamping ring 32 is clamped and installed between the first semi-circular clamping plate 38 and the second semi-circular clamping plate 39. The second fixing rod 31 is clamped and installed at the bottom of the third fixing rod 35.

[0035] According to the above, through the structures of the clamping sleeve 27, the clamping groove 28, the snap plate 29, the spring 30, the second fixing rod 31, the first clamping ring 32, the first clamping rod 33, the second clamping rod 34, the third fixing rod 35, the first connecting plate 36, the second connecting plate 37, the first semi-circular clamping plate 38 and the second semi-circular clamping plate 39, the purpose of strengthening the connection part of the milling cutter is achieved, the connection effect of the milling cutter is improved, the separation of the milling cutter during the milling process is prevented, the safety of the device during use is improved, and the use experience of the device is optimized.

[0036] Embodiment 2: On the basis of Embodiment 1, specifically as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the hoisting structure includes a first rotating rod 16 rotatably installed on the top of the first support base 11. A first fixed circular plate 17 is fixedly installed at the top of the first rotating rod 16. Eight groups of holes are opened at the top of the first fixed circular plate 17. A group of second arc-shaped limiting plates 21 are fixedly installed in the holes. A third arc-shaped limiting plate 22 is fixedly installed inside the second arc-shaped limiting plate 21. Four groups of reset spring rods 24 are fixedly installed between the second arc-shaped limiting plate 21 and the third arc-shaped limiting plate 22. An arc-shaped anti-slip cushion plate 23 is fixedly installed on the inner wall of the third arc-shaped limiting plate 22. The first connecting rod 25 is clamped by the arc-shaped anti-slip cushion plate 23, so that the inner wall of the arc-shaped anti-slip cushion plate 23 is in close contact with the outer wall of the first connecting rod 25.

[0037] Specifically as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the hoisting assembly further includes a second fixed circular plate 18 fixedly installed on the top of the first fixed circular plate 17. Eight groups of first fixed rods 19 are fixedly installed on the outer wall of the second fixed circular plate 18. One end of the first fixed rod 19 is fixedly installed with a first arc-shaped limiting plate 20. A second connecting rod 26 is fixedly installed at the bottom of the clamping sleeve 27. A first connecting rod 25 is fixedly installed at the bottom of the second connecting rod 26. The second connecting rod 26 is clamped and installed inside the first arc-shaped limiting plate 20. The inner wall of the arc-shaped anti-slip cushion plate 23 is in close contact with the outer wall of the first connecting rod 25. The second connecting rod 26 is clamped and fixed by the first arc-shaped limiting plate 20 to improve the hoisting effect of the first connecting rod 25.

[0038] Based on the above, through the structures of the first rotating rod 16, the first fixed circular plate 17, the second fixed circular plate 18, the first fixed rod 19, the first arc-shaped limiting plate 20, the second arc-shaped limiting plate 21, the third arc-shaped limiting plate 22, the arc-shaped anti-slip cushion plate 23, the reset spring rod 24, the first connecting rod 25, the second connecting rod 26 and the clamping sleeve 27, the purpose of limiting and fixing the milling cutter is achieved, the hoisting effect of the milling cutter is improved, it is convenient for the device to select the milling cutter, the convenience of the device in use is improved, and the stability of the device in use is improved.

[0039] Embodiment 3: On the basis of Embodiment 1 and Embodiment 2, specifically as Figure 1 and Figure 2 shown, a first fixed plate 12 is fixedly installed on the top of the first support base 11, a first servo motor 13 is fixedly installed on the top of the first fixed plate 12, a rotating rod is rotatably installed between the first support base 11 and the first fixed plate 12, the output shaft of the first servo motor 13 is fixedly connected to one end of the rotating rod through a coupling, a set of belt pulleys 14 are fixedly installed on the outer wall of the rotating rod, a set of belt pulleys 14 are fixedly installed on the outer wall of the first rotating rod 16, and a transmission belt 15 is sleeved and installed between the two sets of belt pulleys 14. Start the first servo motor 13 to drive the rotating rod to rotate, drive the belt pulley 14 to rotate under the action of the transmission belt 15, and drive the first rotating rod 16 to rotate on the first support base 11.

[0040] Specifically as Figure 1 、 Figure 7 and Figure 8 shown, a second fixed plate 40 is fixedly installed on the top of the fixed base 10, an electric control box 41 is fixedly installed on the top of the fixed base 10, an electric control push rod 42 is fixedly installed on one inner wall of the second fixed plate 40, the electric control box 41 is electrically connected to the electric control push rod 42, two sets of chutes 43 are opened inside the second fixed plate 40, a sliding plate 44 is slidably installed between the two sets of chutes 43, a second rotating rod 45 is rotatably installed on the top of the sliding plate 44, two sets of first support plates 46 are fixedly installed on the outer wall of the second rotating rod 45, a fourth fixed rod 47 is fixedly installed at the bottom of the first support plate 46, and the bottom of the fourth fixed rod 47 is fixedly connected to the top of the third fixed rod 35. Start the electric control box 41 to drive the electric control push rod 42 to move, drive the sliding plate 44 to slide inside the chute 43, adjust the position of the second rotating rod 45, start the second rotating rod 45, drive the two sets of first support plates 46 to rotate, and adjust the position of the fourth fixed rod 47.

[0041] Specifically as Figure 1 、 Figure 2 、 Figure 7 and Figure 8As shown in the figure, a second support base 48 is fixedly installed on the top of the fixed base 10. A second support plate 49 is fixedly installed on the top of the second support base 48. A first robotic arm 50 is arranged on the outer wall of one side of the second support plate 49. A second robotic arm 51 is arranged on the outer wall of one side of the first robotic arm 50. A tightening ring 52 is fixedly installed on the outer wall of one side of the second robotic arm 51. A limiting sleeve 55 is fixedly installed inside the tightening ring 52. An electric control box 53 is fixedly installed on the outer wall of one side of the second robotic arm 51. The electric control box 53 is electrically connected to the tightening ring 52. A milling cutter 54 is fixedly installed at the bottom of the first connecting rod 25. The first robotic arm 50 is supported by the second support base 48 and the second support plate 49. The position of the tightening ring 52 is adjusted by the first robotic arm 50 and the second robotic arm 51. The milling cutter clamped on the outside of the second clamping rod 34 is placed through the limiting sleeve 55.

[0042] In summary, through the structures of the first fixing plate 12, the first servo motor 13, the pulley 14, the transmission belt 15, the first rotating rod 16, the second fixing plate 40, the electric control box 41, the electric control push rod 42, the sliding groove 43, the sliding plate 44, the second rotating rod 45, the first support plate 46, the fourth fixing rod 47, the second support base 48, the second support plate 49, the first robotic arm 50, the second robotic arm 51, the tightening ring 52, the electric control box 53, the milling cutter 54 and the limiting sleeve 55, the purpose of starting the device and selecting and moving the milling cutter is achieved, the automation degree of the device is improved, the replacement efficiency of the milling cutter is improved, the processing efficiency of the device is improved, and the convenience of using the device is improved.

[0043] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A CNC gantry milling tool changing device, comprising a fixed base (10), characterized in that: The top of the fixed base (10) is provided with a connection assembly, the top of the fixed base (10) is provided with a lifting assembly, the connection assembly comprises a clamping sleeve (27) arranged at the top of the fixed base (10), a limiting structure is arranged inside the clamping sleeve (27), the lifting assembly comprises a first support base (11) arranged at the top of the fixed base (10), the top of the first support base (11) is provided with a lifting structure, and the connection assembly also comprises a third fixing rod (35) arranged at the top of the fixed base (10).

2. The CNC gantry milling tool changing device according to claim 1, characterized in that: The limiting structure comprises a clamping groove (28) provided inside the clamping sleeve (27); two groups of clamping plates (29) are fixedly mounted on the inner wall of the clamping groove (28); a group of springs (30) are fixedly mounted on the outer wall of one side of the clamping plate (29); one end of the spring (30) extends to be fixedly connected to the inner wall of the clamping groove (28).

3. The CNC gantry milling tool changing device according to claim 1, characterized in that: The limiting structure also includes two groups of first connecting plates (36) fixedly mounted on the outer wall of the third fixing rod (35); a hole is provided on the inner wall of the first connecting plate (36), and a second connecting plate (37) is slidably mounted in the hole; a group of first semicircular clamping plates (38) and a group of second semicircular clamping plates (39) are respectively fixedly mounted on the bottom of the two groups of second connecting plates (37).

4. The CNC gantry milling tool changing device according to claim 1, characterized in that: The limiting structure further comprises a second fixing rod (31) arranged at the top of the fixing base (10); two groups of first clamping rings (32) are fixedly mounted on the outer wall of the second fixing rod (31); a first clamping rod (33) is fixedly mounted on the bottom of the second fixing rod (31); a second clamping rod (34) is fixedly mounted on the bottom of the first clamping rod (33); the first clamping rod (33) and the second clamping rod (34) are clamped and mounted inside the clamping groove (28); and the first clamping ring (32) is clamped and mounted between the first semicircular clamping plate (38) and the second semicircular clamping plate (39).

5. The CNC gantry milling tool changing device according to claim 1, characterized in that: The hoisting structure comprises a first rotating rod (16) rotatably mounted on the top of the first supporting base (11); a first fixed circular plate (17) is fixedly mounted on the top of the first rotating rod (16); eight groups of holes are opened on the top of the first fixed circular plate (17); a group of second arc-shaped limit plates (21) are fixedly mounted in each of the holes; a third arc-shaped limit plate (22) is fixedly mounted inside the second arc-shaped limit plate (21); four groups of return spring rods (24) are fixedly mounted between the second arc-shaped limit plate (21) and the third arc-shaped limit plate (22); and an arc-shaped anti-slip pad (23) is fixedly mounted on the inner wall of the third arc-shaped limit plate (22).

6. The CNC gantry milling tool changing device according to claim 5, characterized in that: The hoisting assembly further comprises a second fixed circular plate (18) fixedly mounted on the top of the first fixed circular plate (17); eight groups of first fixed rods (19) are fixedly mounted on the outer wall of the second fixed circular plate (18); a first arc-shaped limit plate (20) is fixedly mounted on one end of the first fixed rod (19); a second connecting rod (26) is fixedly mounted on the bottom of the clamping sleeve (27); a first connecting rod (25) is fixedly mounted on the bottom of the second connecting rod (26); the second connecting rod (26) is clamped and mounted inside the first arc-shaped limit plate (20); and the inner wall of the arc-shaped anti-slip pad (23) is in close contact with the outer wall of the first connecting rod (25).

7. The CNC gantry milling tool changing device according to claim 1, characterized in that: A first fixed plate (12) is fixedly mounted on the top of the first support base (11), a first servo motor (13) is fixedly mounted on the top of the first fixed plate (12), a rotary rod is rotatably mounted between the first support base (11) and the first fixed plate (12), an output shaft of the first servo motor (13) is fixedly connected to one end of the rotary rod via a coupling, a group of pulleys (14) is fixedly mounted on the outer wall of the rotary rod, a group of pulleys (14) is fixedly mounted on the outer wall of the first rotating rod (16), and a transmission belt (15) is sleeved and mounted between the two groups of pulleys (14).

8. The CNC gantry milling tool changing device according to claim 1, characterized in that: A second fixed plate (40) is fixedly mounted on the top of the fixed base (10), an electric control box (41) is fixedly mounted on the top of the fixed base (10), an electric control push rod (42) is fixedly mounted on the inner wall of one side of the second fixed plate (40), the electric control box (41) is electrically connected to the electric control push rod (42), two groups of slide grooves (43) are opened inside the second fixed plate (40), a slide plate (44) is slidably mounted between the two groups of slide grooves (43), a second rotating rod (45) is rotatably mounted on the top of the slide plate (44), two groups of first supporting plates (46) are fixedly mounted on the outer wall of the second rotating rod (45), a fourth fixed rod (47) is fixedly mounted on the bottom of the first supporting plate (46), and the bottom of the fourth fixed rod (47) is fixedly connected to the top of the third fixed rod (35).

9. The CNC gantry milling tool changing device according to claim 1, characterized in that: A second support base (48) is fixedly mounted on the top of the fixed base (10), a second support plate (49) is fixedly mounted on the top of the second support base (48), a first mechanical arm (50) is arranged on one side outer wall of the second support plate (49), a second mechanical arm (51) is arranged on one side outer wall of the first mechanical arm (50), a tightening ring (52) is fixedly mounted on one side outer wall of the second mechanical arm (51), a limiting sleeve (55) is fixedly mounted inside the tightening ring (52), an electric control box (53) is fixedly mounted on one side outer wall of the second mechanical arm (51), the electric control box (53) is electrically connected to the tightening ring (52), and a milling cutter (54) is fixedly mounted on the bottom of the first connecting rod (25).

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