Multifunctional automatic tool changing milling machine and using method thereof

Abstract

The invention discloses a multifunctional automatic tool changing milling machine and a using method thereof, and particularly relates to the technical field of milling machines, the multifunctional automatic tool changing milling machine comprises a milling machine main body, a tool bit mounting body and a plurality of milling cutters, one milling cutter is mounted on the tool bit mounting body, a tool base is arranged on the milling machine main body, a plurality of tool frames are mounted on the tool base, and the tool frames are arranged on the milling machine main body. A plurality of cutter grooves allowing the milling cutters to be inserted and pulled out are formed in the cutter frames; the cutter changing assemblies are used for forming the same radian between the interior of the cutter groove and the exterior of the milling cutter and keeping the milling cutter and the cutter head mounting body positioned and changed; through the arrangement of the tool changing assembly, the shape of the interior of the tool groove can be kept the same as that of a milling cutter, and the milling cutter is limited at multiple points in the tool groove, so that the milling cutter is precisely inserted and stably fixed in the tool groove, precise positioning of the milling cutter and the tool frame support is facilitated, the aligning frequency of the milling cutter in the replacing process is reduced, and the machining efficiency is improved. Therefore, the milling machine tool changing speed is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of milling machines, in particular to a multifunctional automatic tool changing milling machine and a using method thereof. BACKGROUND

[0002] In the metal processing process, the surfaces of the workpiece are usually processed by a milling machine. The milling machine mainly refers to a machine tool for processing various surfaces of a workpiece by a milling cutter. The milling cutter mainly rotates as the main movement, and the movement of the workpiece and the milling cutter is the feeding movement. The milling machine can mill, drill and bore the workpiece. At present, when the milling machine is used, the wear of the milling tool increases due to the large number of workpieces to be processed and the different types of workpieces. Therefore, multiple milling tools need to be set up and automatically replaced to meet the different processing requirements of the milling machine. When the milling tool in the milling machine is replaced, the milling tool is loosened by the external fixture of the milling machine, and one end of the milling tool is inserted into the tool holder. Since the milling tool rotates during use, the initial position of the milling tool changes, which causes the difference between the milling tool and the tool holder and leads to the contact between them and the damage to one end of the milling tool. Therefore, the milling tool needs to be returned to the original position during replacement, which affects the tool changing speed and reduces the service life of the milling tool. SUMMARY

[0003] The present application aims to provide a multifunctional automatic tool changing milling machine and a using method thereof. By setting the tool changing assembly, the shape of the tool groove is the same as that of the milling cutter, and the milling cutter is limited at multiple points in the tool groove, so that the milling cutter can be accurately inserted and stably fixed in the tool groove. This is beneficial to accurately positioning the milling cutter and the tool holder support, reduces the number of returning to the original position of the milling cutter during replacement, and improves the tool changing speed of the milling machine to solve the above problems in the art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a multifunctional automatic tool changing milling machine and a using method thereof, comprising:

[0005] A milling machine body, a tool head mounting body and a plurality of milling cutters are provided. One of the milling cutters is mounted on the tool head mounting body. A tool holder is provided on the milling machine body. A plurality of tool holders are mounted on the tool holder. A plurality of tool grooves are provided on the tool holder for inserting and pulling the milling cutter.

[0006] The application discloses a plurality of tool changing assemblies for forming the same curvature inside a tool groove and outside a milling cutter and keeping the milling cutter and a tool head mounting body in position for replacement, each of the tool changing assemblies comprises a swing block installed in a tool holder, a limiting column installed in the tool groove and in contact with the outside of the milling cutter, and a contact block fixedly connected to one end of the limiting column, and the contact block is located in the tool holder and in contact with one side of the swing block, a spring is installed between the contact block and the tool holder, a tool positioning assembly is arranged on a milling machine body for moving the tool seat and the tool holder to the tool head mounting body and keeping the tool holder and the tool head mounting body in position for replacement, a guide assembly is arranged in the tool positioning assembly for lifting and lowering the tool positioning assembly along the milling machine body and storing and protecting the milling cutter in the tool changing assembly, and one end of the contact block is in a circular arc structure, so that the circular arc of the one end of the contact block is in point contact with one end of the swing block, the contact block and the swing block can be kept in good pushing and swinging, the limiting column can be extended and retracted in the tool groove and the tool holder, the limiting column and the milling cutter can be kept in stable contact, the spring has elasticity, the one side of the contact block is given a pushing force, the contact block and the swing block are not rigidly connected, the swing block and the contact block can be kept in stable contact and swinging, the stable contact and quick reset between the limiting column and the milling cutter are realized, and the milling cutter can be quickly taken out or stably inserted in the tool groove.

[0007] Preferably, the tool changing assembly further comprises a stabilizing column fixed in the tool holder and a floating groove provided on one side of the swing block for inserting the stabilizing column, and the floating groove is in an elliptical structure.

[0008] Preferably, a sleeve is further fixed in the tool holder and communicated with the inside of the tool groove, the sleeve is sleeved on the outside of the limiting column, the limiting column and the sleeve are movably sleeved, the limiting column slides up and down in the sleeve, the limiting column is freely extended and retracted in the tool holder and the tool groove under the action of the sleeve, the sleeve can reduce the direct friction between the limiting column and the tool holder, the surface of the clamping column can be prevented from being damaged due to long-time friction, and the service life of the limiting column is prolonged.

[0009] Preferably, the tool positioning assembly includes a connecting frame slidably connected to one side of the milling machine body, an intermittent wheel fixedly connected to one end of the tool holder, and a positioning frame slidably connected to one side of the connecting frame, with the positioning frame and the intermittent wheel rotatably connected. A first telescopic cylinder is installed on one side of the milling machine body, and the first telescopic cylinder is used to drive the connecting frame to slide left and right along one side of the milling machine body. A centering column is rotatably connected to one side of the positioning frame, and the outside of the centering column is in contact with the outside of the intermittent wheel. A connecting ring is sleeved on the outside of the centering column, and the connecting ring is located below the intermittent wheel. A push column is fixed on one side of the connecting ring. The intermittent wheel has multiple intermittent grooves on its outside for the push column to slide through, and the intermittent grooves are U-shaped. A servo motor is fixed on one side of the positioning frame, and the servo motor is used to drive the centering column to rotate. The multiple intermittent grooves divide the intermittent wheel into six halves, and the six halves of the intermittent wheel are aligned with the upper and lower centers of the multiple tool holders. Thus, when the push column rotates and slides through one of the intermittent grooves, it pushes the intermittent wheel and the tool holder to rotate, and then pushes another tool holder and another intermittent groove to move to the position of one of the intermittent grooves. This process is repeated to keep each tool holder in a uniform position during rotation.

[0010] Preferably, the guide assembly includes a shaft fixed to one side of the positioning frame, a second telescopic cylinder fixed to the bottom of the connecting frame, and a mounting frame fixed to the top of the second telescopic cylinder. The mounting frame is sleeved on the outside of the shaft, and the connecting frame is provided with a rotating component that drives the shaft to rotate within the mounting frame.

[0011] Preferably, a stabilizing frame is also fixed to one side of the connecting frame, and a circular groove for the stabilizing frame to slide is provided at the top of the mounting frame.

[0012] Preferably, the rotating assembly includes a replacement slot on one side of the connecting frame, a rotating column fixed to one end of the shaft, and a gear sleeved on the rotating column. The rotating column is located inside the replacement slot. A rack is fixed to one side of the connecting frame adjacent to the replacement slot, and the rack meshes with the gear. A limiting frame is fixed to one end of the rotating column, and the limiting frame is located inside the replacement slot. The replacement slot is C-shaped, so that the top and bottom of the replacement slot can be engaged with the limiting frame to limit the gear after it meshes with the rack, ensuring the stability of the gear. At the same time, the middle of the replacement slot is hollow, allowing the limiting frame to rotate in the middle of the replacement slot, thereby changing its original state.

[0013] A method for using a multi-functional automatic tool-changing milling machine includes the following steps:

[0014] S1. The second telescopic cylinder extends and retracts to drive the mounting bracket and positioning bracket to slide downward along one side of the connecting bracket. Then, the rotating component drives the positioning bracket to rotate along one side of the mounting bracket, changing the horizontal state of the tool holder and the mounting bracket to a vertical state. This is used to maintain precise positioning between the tool holder and the tool head mounting body, so that one of the tool holders and the tool head mounting body are precisely aligned.

[0015] S2. Drive the connecting frame to slide to the right along one side of the milling machine body by the first telescopic cylinder. At this time, the tool holder and one of the tool holders move closer to the tool head mounting body. Then, one of the milling cutters is inserted into the tool slot and keeps it in contact with multiple sets of tool changing components.

[0016] S3, and through multiple tool changing components, the inside of the tool slot and the outside of one of the milling cutters are made to form the same curvature, so that the inside of the tool slot is the same as the shape of one of the milling cutters, and the milling cutter is restricted at multiple points in the tool slot, so that the milling cutter is accurately inserted and stably fixed in the tool slot. At this time, the cutter head mounting body releases one of the milling cutters.

[0017] S4. The first telescopic cylinder drives the connecting frame to move to the left along one side of the milling machine body. Then, one of the milling cutters is taken out of the cutter head mounting body. At this time, the servo motor drives the intermittent wheel to rotate, and the rotation of the intermittent wheel causes the tool holder mounted on its outside to rotate synchronously. Moreover, the position of one tool holder is swapped with the other tool holders, so that the other tool holder swaps the other milling cutter.

[0018] S5. Driven by the first telescopic cylinder, the connecting frame slides to the right along one side of the milling machine body. Then, another milling cutter is inserted and installed in the cutter head mounting body, thereby maintaining the other milling cutter in position for replacement. As the first telescopic cylinder drives the connecting frame to move to the left along one side of the milling machine body, the second telescopic cylinder pushes the mounting frame upward, changing the vertical state of the tool holder and one side of the mounting frame to a horizontal state, so that the tool holder moves and resets, waiting for the next replacement operation of the other milling cutter on the cutter head mounting body.

[0019] The technical effects and advantages provided by the present invention in the above technical solution are as follows:

[0020] 1. By setting up the tool changer assembly, the tool slot can be kept in the same shape as the milling cutter, and the milling cutter can be restricted at multiple points in the tool slot. This ensures that the milling cutter is accurately inserted and stably fixed in the tool slot, which is conducive to the accurate positioning of the milling cutter and the tool holder support, reduces the number of times the milling cutter needs to be returned to center during the change process, and thus improves the tool change speed of the milling machine.

[0021] 2. By setting up the rocker block, contact block, and limiting post, one end of the contact block is made into an arc shape, which is conducive to the point contact between the arc of the contact block and the rocker block, so that they can float together. This helps the contact block and the rocker block to maintain good pushing and swinging. It also facilitates the extension and retraction of the limiting post along the tool groove and the tool holder, so that the limiting post and the milling cutter maintain stable contact, further improving the tool changing speed of the milling machine.

[0022] 3. By setting up the intermittent wheel, intermittent groove and push column, the intermittent wheel can be divided into six halves by the action of multiple intermittent grooves. Moreover, the intermittent wheel divided into six halves keeps the upper and lower centers aligned with multiple tool holders. Thus, the intermittent wheel rotates intermittently along one side of the positioning frame, which makes it easy to keep multiple tool holders in a uniform position during rotation. This ensures that each tool holder is accurately positioned with the tool head mounting body, further improving the tool changing speed of the milling machine.

[0023] 4. By setting up the guide component, the positioning frame can be extended and lowered during the movement of the connecting frame, so that the connecting frame and the positioning frame can work synchronously, thereby improving the force transmission efficiency of the equipment. At the same time, the positioning frame moves up and down on the connecting frame, so that the tool holder and tool post move synchronously along one side of the connecting frame, thereby reducing the time required for the tool holder and tool post to align with the tool head mounting body, improving the overall operating efficiency, and further increasing the tool changing speed of the milling machine.

[0024] 5. By setting up the rotating component, the state between the positioning frame and the mounting frame can be changed, which facilitates the storage and protection of the milling cutters in the tool holder, so that the chips and waste liquid generated during machining are not easily adhered to other milling cutters, ensuring the quick tool change operation of the milling cutters next time. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the assembly of the tool positioning component and the guide component of the present invention;

[0028] Figure 3 This is a schematic diagram of the assembly of the tool changer and the milling cutter according to the present invention;

[0029] Figure 4 This is a schematic diagram of the tool changing assembly of the present invention;

[0030] Figure 5 This is a schematic diagram of the tool positioning assembly of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the guiding component of the present invention;

[0032] Figure 7 This is a schematic diagram of the assembly of the limiting frame and the replacement slot of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Milling machine body; 11. Cutter head mount; 12. Milling cutter; 13. Tool holder; 14. Tool rest; 15. Tool groove;

[0035] 2. Tool changing assembly; 21. Limiting post; 22. Swing block; 23. Floating groove; 24. Stabilizing post; 25. Contact block; 26. Spring; 27. Sleeve;

[0036] 3. Tool positioning assembly; 31. Positioning frame; 32. Connecting frame; 33. Intermittent wheel; 34. Intermittent groove; 35. Push column; 36. Connecting ring; 37. Servo motor; 38. Centering column; 39. First telescopic cylinder;

[0037] 4. Guide assembly; 41. Mounting bracket; 42. Second telescopic cylinder; 43. Replacement slot; 44. Rotating column; 45. Shaft column; 46. Gear; 47. Limiting frame; 48. Rack; 49. Stabilizing frame. Detailed Implementation

[0038] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] This invention provides, for example Figures 1-5 The invention relates to a multi-functional automatic tool-changing milling machine and its usage method, comprising: a milling machine body 1, a tool head mounting body 11, and a plurality of milling cutters 12, wherein one of the milling cutters 12 is mounted on the tool head mounting body 11. The milling machine body 1 is provided with a tool holder 13, and a plurality of tool holders 14 are mounted on the tool holder 13, and each of the plurality of tool holders 14 is provided with a plurality of tool slots 15 for inserting and removing the milling cutter 12. The specific structure and principle of the tool head mounting body 11 are all prior art, and can be referenced (in the patent announcement number CN118617168A, a multi-functional CNC milling machine with convenient automatic tool changing is disclosed). Therefore, this structure is common knowledge in the art, and therefore has not been described in detail in this application.

[0040] Multiple tool changing assemblies 2 are used to form the same arc between the inside of the tool slot 15 and the outside of the milling cutter 12, and to maintain the positioning and replacement between the milling cutter 12 and the cutter head mounting body 11. Each tool changing assembly 2 includes a rocker block 22 installed in the tool holder 14, a limiting post 21 installed in the tool slot 15 and in contact with the outside of the milling cutter 12, and a contact block 25 fixedly connected to one end of the limiting post 21. The contact block 25 is located in the tool holder 14 and contacts one side of the rocker block 22. A spring 26 is installed between the contact block 25 and the tool holder 14. The milling machine body 1 is provided with a tool positioning assembly 3 for driving the tool. The base 13 and the tool holder 14 move toward the tool head mounting body 11 and maintain the tool holder 14 and the tool head mounting body 11 in a positional rotation. The tool positioning assembly 3 is provided with a guide assembly 4 that moves it up and down along the milling machine body 1, which is used to store and protect the milling cutter 12 in the tool changing assembly 2. The tool changing assembly 2 also includes a stabilizing column 24 fixed in the tool holder 14 and a floating groove 23 opened on one side of the rocker block 22 for the stabilizing column 24 to be inserted, and the floating groove 23 has an elliptical structure. A sleeve 27 that communicates with the inside of the tool groove 15 is also fixed in the tool holder 14, and the sleeve 27 is sleeved on the outside of the limiting column 21.

[0041] The tool positioning assembly 3 includes a connecting frame 32 slidably connected to one side of the milling machine body 1, an intermittent wheel 33 fixedly connected to one end of the tool holder 13, and a positioning frame 31 slidably connected to one side of the connecting frame 32. The positioning frame 31 and the intermittent wheel 33 are rotatably connected. A first telescopic cylinder 39 is installed on one side of the milling machine body 1. The first telescopic cylinder 39 is used to drive the connecting frame 32 to slide left and right along one side of the milling machine body 1. A centering column 38 is rotatably connected to one side of the positioning frame 31. The outside of the centering column 38 is in contact with the outside of the intermittent wheel 33. A connecting ring 36 is sleeved on the outside of the centering column 38. The connecting ring 36 is located below the intermittent wheel 33. A push column 35 is fixed on one side of the connecting ring 36. Multiple intermittent grooves 34 are opened on the outside of the intermittent wheel 33 for the push column 35 to slide. The intermittent grooves 34 are U-shaped. A servo motor 37 is fixed on one side of the positioning frame 31. The servo motor 37 is used to drive the centering column 38 to rotate.

[0042] When the milling machine tool needs to be replaced, the first telescopic cylinder 39 drives the connecting frame 32 to move to the right along one side of the milling machine body 1. Then, the guide assembly 4 moves, causing the positioning frame 31 to move downward and rotate along one side of the connecting frame 32. At this time, the tool holder 13 moves closer to the tool head mounting body 11 under the movement of the connecting frame 32, and one of the tool holders 14 is aligned with the support of the tool head mounting body 11. The milling cutter 12 on the tool head mounting body 11 is precisely inserted into the tool slot 15, and the milling cutter 12 is inserted into the tool slot 15. When contact occurs between the limiting post 21 and the milling cutter 12, the limiting post 21 abuts against the milling cutter 12 and pushes the limiting post 21 to slide along the sleeve 27. The movement of the limiting post 21 then moves the contact block 25, causing one end of the contact block 25 to make point contact with one end of the rocker block 22, facilitating a floating effect. Subsequently, under the action of the floating groove 23, the rocker block 22 rotates along the outside of the stabilizing post 24, causing the rocker block 22 to swing, thereby moving the limiting post 21 along the tool groove 15 into the tool holder 14. The limiting post 21 is kept in close contact with the milling cutter 12, and then the inside of the tool groove 15 and the outside of the milling cutter 12 form the same arc, so that the inside of the tool groove 15 is the same as the shape of the milling cutter 12, which is conducive to the precise positioning of the milling cutter 12 and the tool holder 14 bracket; next, the first telescopic cylinder 39 moves to drive the connecting frame 32 to move to the left, pulling the milling cutter 12 out of the cutter head mounting body 11, and the centering post 38 is driven to rotate by the servo motor 37, and then the connecting ring 36 rotates to drive the push post 35 to rotate, so that the push post 35 rotates around As the centering column 38 moves in a circular motion, the push column 35 rotates and slides into one of the intermittent grooves 34 and forms a compression with its interior. Then, it pushes the intermittent wheel 33 to rotate along one side of the positioning frame 31, positioning and rotating multiple tool holders 14. Subsequently, the first telescopic cylinder 39 drives the connecting frame 32 to slide to the right along one side of the milling machine body 1. Then, another milling cutter 12 is inserted into the cutter head mounting body 11, thereby maintaining the positioning and replacement between the other milling cutter 12 and the cutter head mounting body 11, completing the milling machine tool changing operation.

[0043] refer to Figures 1-7As shown, the guide assembly 4 includes a shaft column 45 fixed to one side of the positioning frame 31, a second telescopic cylinder 42 fixed to the bottom of the connecting frame 32, and a mounting frame 41 fixed to the top of the second telescopic cylinder 42. The mounting frame 41 is sleeved on the outside of the shaft column 45. The connecting frame 32 is provided with a rotating assembly that drives the shaft column 45 to rotate within the mounting frame 41. A stabilizing frame 49 is also fixed to one side of the connecting frame 32. A circular groove for sliding the stabilizing frame 49 is opened at the top of the mounting frame 41. The rotating assembly includes a replacement groove 43 opened on one side of the connecting frame 32, a rotating column 44 fixed to one end of the shaft column 45, and a gear 46 sleeved on the rotating column 44. The rotating column 44 is located in the replacement groove 43. A rack 48 is fixed to one side of the connecting frame 32 adjacent to the replacement groove 43. The rack 48 meshes with the gear 46. A limiting frame 47 is fixed to one end of the rotating column 44. The limiting frame 47 is located in the replacement groove 43.

[0044] Through the above technical solution:

[0045] When the milling cutter 12 is replaced and needs to be stored and protected, the connecting frame 32 first moves to the left along one side of the milling machine body 1. Then, the distance between the tool holder 13 and the cutter head mounting body 11 continuously increases. The second telescopic cylinder 42 drives the telescopic movement of the mounting frame 41, which slides up or down along one side of the connecting frame 32. Then, the mounting frame 41 moves upward and slides between the circular groove on one side and the stabilizing frame 49, so that the mounting frame 41 moves stably. At this time, the movement of the mounting frame 41 drives the positioning frame 31, the rotating column 44, the limiting frame 47 and the gear 46 to move upward synchronously. The rotating column 44 and the limiting frame 47 slide upward along the bottom wall of the replacement groove 43 into the interior of the replacement groove 43. In the middle, the gear 46 meshes with the rack 48, driving the rotating column 44 to rotate in the middle of the replacement slot 43. As the rotating column 44 rotates, it drives the positioning frame 31 and the limiting frame 47 to rotate. Subsequently, the positioning frame 31 and the mounting frame 41 change from a vertical state to a horizontal state. Then, the mounting frame 41 moves upward and inserts one end of the limiting frame 47 into the top wall inside the replacement slot 43. This makes the tool holder 13 and the tool holder 14 far away from the cutter head mounting body 11, which facilitates the storage and protection of the milling cutter 12 in the tool holder 14, so that the chips and waste liquid generated during processing are not easily adhered to other milling cutters 12, ensuring the quick tool change operation of the milling cutter 12 next time.

[0046] A method for using a multi-functional automatic tool-changing milling machine includes the following steps:

[0047] S1. The second telescopic cylinder 42 extends and retracts, causing the mounting bracket 41 and the positioning bracket 31 to slide downward along one side of the connecting bracket 32. Then, the rotating component drives the positioning bracket 31 to rotate along one side of the mounting bracket 41, changing the horizontal state of the tool holder 13 and the mounting bracket 41 to a vertical state. This is used to maintain precise positioning between the tool holder 13 and the tool head mounting body 11, so that one of the tool holders 14 and the tool head mounting body 11 are precisely aligned.

[0048] S2. Drive the connecting frame 32 to slide to the right along one side of the milling machine body 1 by the first telescopic cylinder 39. At this time, the tool holder 13 and one of the tool holders 14 move closer to the tool head mounting body 11. Then, one of the milling cutters 12 is inserted into the tool slot 15 and keeps it in contact with the multiple sets of tool changing components 2.

[0049] S3, and through multiple tool changing components 2, the inside of the tool groove 15 and the outside of one of the milling cutters 12 are formed with the same curvature, so that the inside of the tool groove 15 is the same as the shape of one of the milling cutters 12, and the milling cutter 12 is restricted at multiple points in the tool groove 15, so that the milling cutter 12 is accurately inserted and stably fixed in the tool groove 15. At this time, the tool head mounting body 11 releases one of the milling cutters 12.

[0050] S4. Drive the connecting frame 32 to move to the left along one side of the milling machine body 1 by the first telescopic cylinder 39. Then, one of the milling cutters 12 is taken out from the cutter head mounting body 11. At this time, the servo motor 37 drives the intermittent wheel 33 to rotate. The rotation of the intermittent wheel 33 causes the tool holder 14 mounted on its outside to rotate synchronously. Moreover, the position of one tool holder 14 is swapped with the other tool holders 14, so that the other tool holder 14 swaps the other milling cutter 12.

[0051] S5. Driven by the first telescopic cylinder 39, push the connecting frame 32 to slide to the right along one side of the milling machine body 1. Then, another milling cutter 12 is inserted into the cutter head mounting body 11, thereby maintaining the other milling cutter 12 in position for replacement with the cutter head mounting body 11. As the first telescopic cylinder 39 drives the connecting frame 32 to move to the left along one side of the milling machine body 1, the second telescopic cylinder 42 pushes the mounting frame 41 upward, changing the vertical state of the tool holder 13 and the mounting frame 41 to a horizontal state, so that the tool holder 13 moves and resets, waiting for the next replacement operation of the other milling cutter 12 on the cutter head mounting body 11.

[0052] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-functional automatic tool-changing milling machine and its usage method, characterized in that, include: The milling machine body (1), the cutter head mounting body (11) and a plurality of milling cutters (12) are provided, and one of the milling cutters (12) is mounted on the cutter head mounting body (11). The milling machine body (1) is provided with a tool holder (13), and a plurality of tool holders (14) are mounted on the tool holder (13). The plurality of tool holders (14) are provided with a plurality of tool slots (15) for inserting and removing the milling cutter (12). Multiple sets of tool changing assemblies (2) are used to form the same arc between the inside of the tool slot (15) and the outside of the milling cutter (12), and to maintain the positioning and replacement between the milling cutter (12) and the cutter head mounting body (11). Each set of tool changing assemblies (2) includes a rocker block (22) installed in the tool holder (14), a limiting post (21) installed in the tool slot (15) and in contact with the outside of the milling cutter (12), and a contact block (25) fixedly connected to one end of the limiting post (21). The contact block (25) is located in the tool holder (14) and close to the rocker block (22). The contact block (25) and the tool holder (14) are connected on one side. A spring (26) is installed between them. The milling machine body (1) is provided with a tool positioning assembly (3) to drive the tool holder (13) and the tool holder (14) to move towards the tool head mounting body (11) and keep the tool holder (14) and the tool head mounting body (11) in a rotating position. The tool positioning assembly (3) is provided with a guide assembly (4) to lift and lower it along the milling machine body (1) and to store and protect the milling cutter (12) in the tool changing assembly (2).

2. The multi-functional automatic tool-changing milling machine and its method of use according to claim 1, characterized in that: The tool changing assembly (2) also includes a stabilizing column (24) inside the fixed tool holder (14) and a floating groove (23) opened on one side of the rocker block (22) for the stabilizing column (24) to be inserted, and the floating groove (23) has an elliptical structure.

3. The multifunctional automatic tool-changing milling machine and its method of use according to claim 1, characterized in that: The tool holder (14) is also fixed with a sleeve (27) that communicates with the inside of the tool groove (15), and the sleeve (27) is sleeved on the outside of the limiting post (21).

4. The multi-functional automatic tool-changing milling machine and its method of use according to claim 1, characterized in that: The tool positioning assembly (3) includes a connecting frame (32) slidably connected to one side of the milling machine body (1), an intermittent wheel (33) fixedly connected to one end of the tool holder (13), and a positioning frame (31) slidably connected to one side of the connecting frame (32). The positioning frame (31) and the intermittent wheel (33) are rotatably connected. A first telescopic cylinder (39) is installed on one side of the milling machine body (1), and the first telescopic cylinder (39) is used to drive the connecting frame (32) to slide left and right along one side of the milling machine body (1). A centering column is rotatably connected to one side of the positioning frame (31). (38), and the outside of the centering column (38) is in contact with the outside of the intermittent wheel (33). A connecting ring (36) is sleeved on the outside of the centering column (38), and the connecting ring (36) is located below the intermittent wheel (33). A push column (35) is fixed on one side of the connecting ring (36). Multiple intermittent grooves (34) for the push column (35) to slide are opened on the outside of the intermittent wheel (33), and the intermittent grooves (34) are U-shaped. A servo motor (37) is fixed on one side of the positioning frame (31), and the servo motor (37) is used to drive the centering column (38) to rotate.

5. The multi-functional automatic tool-changing milling machine and its method of use according to claim 4, characterized in that: The guide assembly (4) includes a shaft column (45) fixed on one side of the positioning frame (31), a second telescopic cylinder (42) fixed at the bottom of the connecting frame (32), and a mounting frame (41) fixed at the top of the second telescopic cylinder (42). The mounting frame (41) is sleeved on the outside of the shaft column (45). The connecting frame (32) is provided with a rotating assembly that drives the shaft column (45) to rotate along the mounting frame (41).

6. The multi-functional automatic tool-changing milling machine and its method of use according to claim 5, characterized in that: A stabilizing frame (49) is also fixed on one side of the connecting frame (32), and a circular groove for the stabilizing frame (49) to slide is provided at the top of the mounting frame (41).

7. The multi-functional automatic tool-changing milling machine and its method of use according to claim 5, characterized in that: The rotating assembly includes a replacement slot (43) on one side of the connecting frame (32), a rotating column (44) fixed to one end of the shaft column (45), and a gear (46) sleeved on the rotating column (44). The rotating column (44) is located in the replacement slot (43). A rack (48) is fixed on one side of the connecting frame (32) adjacent to the replacement slot (43), and the rack (48) meshes with the gear (46). A limiting frame (47) is fixed at one end of the rotating column (44), and the limiting frame (47) is located in the replacement slot (43).

8. The method of using a multi-functional automatic tool-changing milling machine according to claim 7, characterized in that, Includes the following steps: S1. The second telescopic cylinder (42) extends and retracts, causing the mounting bracket (41) and positioning bracket (31) to slide downward along one side of the connecting bracket (32). Then, the rotating component drives the positioning bracket (31) to rotate along one side of the mounting bracket (41), changing the horizontal state of the tool holder (13) and the mounting bracket (41) to a vertical state, so as to maintain precise positioning between the tool holder (13) and the tool head mounting body (11), so that one of the tool holders (14) and the tool head mounting body (11) are precisely aligned. S2. Drive the connecting frame (32) to slide to the right along one side of the milling machine body (1) by the first telescopic cylinder (39). At this time, the tool holder (13) and one of the tool holders (14) move closer to the tool head mounting body (11). Then, one of the milling cutters (12) is inserted into the tool slot (15) and keeps it in contact with the multiple sets of tool changing components (2). S3, and through multiple tool changing components (2) to form the same arc inside the tool groove (15) and outside one of the milling cutters (12), so that the inside of the tool groove (15) is the same as the shape of one of the milling cutters (12), and the milling cutter (12) is restricted at multiple points in the tool groove (15), so that the milling cutter (12) is accurately inserted and stably fixed in the tool groove (15), at which time the cutter head mounting body (11) releases one of the milling cutters (12); S4. Drive the connecting frame (32) to move to the left along one side of the milling machine body (1) by the first telescopic cylinder (39). Then one of the milling cutters (12) is taken out in the cutter head mounting body (11). At this time, the servo motor (37) drives the intermittent wheel (33) to rotate. The intermittent wheel (33) rotates synchronously with the tool holder (14) mounted on its exterior. Moreover, the position of one tool holder (14) is swapped with the other tool holders (14), so that the other tool holder (14) swaps the other milling cutter (12). S5. Drive the connecting frame (32) to slide to the right along one side of the milling machine body (1) by the first telescopic cylinder (39). Then, another milling cutter (12) is inserted into the cutter head mounting body (11), thereby keeping the other milling cutter (12) and the cutter head mounting body (11) in a position for replacement. As the first telescopic cylinder (39) drives the connecting frame (32) to move to the left along one side of the milling machine body (1), the second telescopic cylinder (42) pushes the mounting frame (41) upward, changing the vertical state of the tool holder (13) and the mounting frame (41) to a horizontal state, so that the tool holder (13) moves back to its original position and waits for the next replacement operation of the other milling cutter (12) on the cutter head mounting body (11).

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