Multipurpose CNC tool bit and using method thereof

Abstract

The invention relates to the technical field of CNC tool bits, in particular to a multipurpose CNC tool bit and a using method thereof.The multipurpose CNC tool bit comprises a bottom plate and a CNC tool bit body arranged on the bottom plate, the CNC tool bit body is provided with a first cutting edge and a second cutting edge which are arranged in parallel up and down, the first cutting edge is a primary blank tool used for primary cutting forming, and the second cutting edge is a finishing tool used for finishing; a rotating shaft is fixedly installed on the CNC tool bit, the outer wall of the rotating shaft is sleeved with a limiting ring, and four fixing rods which are circumferentially arranged at equal intervals are fixedly installed on the limiting ring. The first cutting edge and the second cutting edge which are arranged at the upper end and the lower end of the CNC tool bit are used for conducting preliminary cutting and fine trimming on a mold correspondingly, the fixing table is matched to drive the CNC tool bit to move up and down to adjust and replace different cutting edges, then different functions are achieved, the situation that due to long-term local use of a single cutting edge, the tool elimination frequency is too high is avoided, the machining effect is enhanced, and the machining efficiency is improved. And tolerance caused by frequent tool changing is effectively avoided, and the machining efficiency (1) is improved.

Description

Technical Field

[0001] This invention relates to the field of CNC tool tip technology, and in particular to a multi-purpose CNC tool tip and its usage method. Background Technology

[0002] CNC tool heads are replaceable tool heads used for cutting, milling, drilling, or turning on numerical control machining centers. They are core components in precision machining.

[0003] When existing CNC cutting heads are in use, such as the retractable countersunk CNC machining tool disclosed in CN109570578B, the CNC cutting head is rotated by the drive mechanism so that the cutting edge on the CNC cutting head can cut the mold. However, the CNC cutting head only has one cutting edge. When cutting the mold, only one cutting edge on the CNC cutting head is used to cut the mold, and the cutting edge finishing effect is poor [3]. After long-term use, the cutting edge on the CNC cutting head is easy to become dull, which makes the tool unable to meet the needs of use. It is necessary to frequently replace the CNC cutting head to avoid a decrease in processing efficiency. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of easy wear and poor finishing effect of the cutting head in the prior art, and to propose a multi-purpose CNC cutting head and its usage method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A multi-purpose CNC cutting head includes a base plate and a CNC cutting head mounted on the base plate. The CNC cutting head has two parallel cutting edges, a first cutting edge and a second cutting edge. The first cutting edge is a roughing tool for initial cutting and shaping, and the second cutting edge is a finishing tool for finishing. A rotating shaft is fixedly mounted on the CNC cutting head. A limiting ring is sleeved on the outer wall of the rotating shaft, and four circumferentially evenly spaced fixing rods are fixedly mounted on the limiting ring. A limiting platform is fixedly mounted on the upper end of the four fixing rods. A rotary motor that drives the limiting platform to rotate is fixedly mounted on the upper end of the limiting platform. A fixed platform that drives the rotary motor to move up and down is fixedly mounted on the rotary motor. The CNC cutting head can change different cutting edges through the fixed platform.

[0006] Preferably, two symmetrically arranged electromagnetic rails are fixedly installed on the base plate, and electric sliders are slidably arranged on both electromagnetic rails. A fixing post is fixedly installed on the upper end of each of the two electric sliders, and a mounting frame is fixedly installed on the upper end of the two fixing posts.

[0007] Preferably, a first lead screw is rotatably mounted inside the mounting frame, and a drive motor for driving the first lead screw to rotate is fixedly mounted on the outer wall of the mounting frame. A first sliding block is threaded onto the outer wall of the first lead screw and is slidably disposed inside the mounting frame. Symmetrically arranged sliding grooves are provided on both sides of the inner wall of the mounting frame. Guide rails are fixedly mounted in both sliding grooves, and pulleys are rolled on both guide rails.

[0008] Preferably, both pulleys are rotatably mounted on both sides of the first sliding block via a rotating shaft. A movable plate is fixedly mounted on the bottom end of the first sliding block. Four equally spaced support rods are fixedly mounted on the bottom end of the movable plate. A mounting plate is fixedly mounted on the bottom end of the four support rods. A first servo motor is fixedly mounted on the mounting plate relative to the four support rods. A transverse bevel gear is fixedly mounted on the output end of the first servo motor.

[0009] Preferably, the bottom end of the movable plate is also fixedly installed with four equally spaced fixed frames, each of which is rotatably installed with a second lead screw, and each of the four second lead screws is fixedly installed with a vertical bevel gear on the outer wall of the fixed frame. The four vertical bevel gears are meshed with a horizontal bevel gear, and the four vertical bevel gears are circumferentially arranged on the outer wall of the horizontal bevel gear.

[0010] Preferably, the outer walls of the four second lead screws are each fitted with a second sliding block by a thread, and the four second sliding blocks are respectively slidably disposed in the four fixed frames. The bottom ends of the four second sliding blocks are rotatably mounted with connecting rods by pins, and the bottom ends of the four connecting rods are rotatably connected to the fixed platform by pins.

[0011] Preferably, the limiting platform has four T-shaped slide grooves that are evenly spaced around the circumference, and a third lead screw is rotatably installed in each of the four T-shaped slide grooves. The outer walls of the four third lead screws are threaded with limiting clamping blocks, and four second servo motors that drive the four third lead screws to rotate are fixedly installed on the outer wall of the limiting platform.

[0012] Preferably, four equidistant positioning rods are fixedly installed at the bottom of the limiting platform, and four positioning grooves for placing the positioning rods are opened at the upper end of the rotating shaft.

[0013] Preferably, the outer wall of the rotating shaft is provided with four circumferentially equally spaced limiting grooves, and the bottom ends of the four limiting clamping blocks are respectively slidably disposed in the four limiting grooves.

[0014] The above-mentioned method of using a multi-purpose CNC cutting head includes step S1, in which the output end of the first servo motor drives the horizontal bevel gear to rotate, and when the horizontal bevel gear rotates, it drives the four meshing vertical bevel gears to rotate. The four vertical bevel gears drive the four second lead screws to rotate respectively. The second sliding block is adjusted to slide within the fixed frame, and the included angle between the connecting rod and the second lead screw is adjusted so that the other end of the connecting rod pushes the fixed table to move vertically up and down, thereby adjusting the height of the CNC cutting head and switching different cutting edges to achieve different functions. Step S2: When it is necessary to change to a different CNC cutting head, the third lead screw is driven to rotate by the output end of the second servo motor to adjust the position of the limit clamping block in the T-shaped slide groove, so that the limit clamping block moves towards the direction of the second servo motor. When the limit clamping block moves, it slides out from the limit groove, releasing the limit on the rotating shaft and quickly changing the CNC cutting head. Step S3: When cutting the mold, the first lead screw is driven to rotate by the output end of the drive motor, so that the first sliding block slides in the mounting frame and rolls on the guide rail by the pulley, reducing the friction force on the first sliding block when it moves, making the movement of the first sliding block and the moving plate smoother, and increasing the accuracy of mold processing.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The present invention uses the first cutting edge and the second cutting edge set at the upper and lower ends of the CNC cutter head to perform preliminary cutting and fine finishing on the mold respectively. With the help of the fixed table, the CNC cutter head is moved up and down to adjust and change different cutting edges to achieve different functions. This avoids the long-term local use of a single cutting edge, which causes the tool replacement frequency to be too high. It also enhances the processing effect, effectively avoids frequent tool changes, causes tolerance, and improves processing efficiency [4].

[0016] 2. The present invention adjusts the position of the limiting clamping block in the T-shaped slide groove by rotating the third lead screw, thereby releasing the limitation on the rotating shaft, facilitating quick disassembly and replacement of CNC tool heads, and improving tool changing efficiency.

[0017] 3. The present invention adjusts the position of the first sliding block within the mounting frame by rotating the first lead screw, and the pulleys set at both ends of the first sliding block reduce the friction of the first sliding block, thereby improving the accuracy of the CNC cutter head when moving and cutting the mold. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a multi-purpose CNC tool head proposed in this invention; Figure 2 This is a schematic diagram of the mounting frame and movable plate structure; Figure 3 This is a schematic diagram showing the connection between the first lead screw and the first sliding block; Figure 4This is a schematic diagram showing the connection between the connecting rod and the fixed platform; Figure 5 for Figure 4 Enlarged view of a portion of region A in the middle; Figure 6 This is a schematic diagram showing the connection between the third lead screw and the limit clamping block; Figure 7 This is a schematic diagram of a CNC cutting head.

[0019] In the diagram: 1. Base plate; 2. Electromagnetic guide rail; 3. Electric slider; 4. Fixed column; 5. Mounting frame; 6. First lead screw; 7. Drive motor; 8. First sliding block; 9. Pulley; 10. Sliding groove; 11. Guide rail; 12. Moving plate; 13. Support rod; 14. Mounting plate; 15. First servo motor; 16. Horizontal bevel gear; 17. Fixed frame; 18. Second lead screw; 19. Vertical bevel gear; 20. Second sliding block; 21. Connecting rod; 22. Fixed platform; 23. Rotary motor; 24. Limiting platform; 25. T-shaped slide groove; 26. Third lead screw; 27. Limiting clamping block; 28. Second servo motor; 29. ​​Positioning rod; 30. Fixed rod; 31. Limiting ring; 32. Rotating shaft; 33. Limiting groove; 34. Positioning groove; 35. CNC cutting head; 36. First cutting edge; 37. Second cutting edge. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Reference Figures 1-7 A multi-purpose CNC cutting head includes a base plate 1 and a CNC cutting head 35 mounted on the base plate 1. The CNC cutting head 35 has two parallel cutting edges 36 and 37. The first cutting edge 36 is a roughing tool for initial cutting and shaping, and the second cutting edge 37 is a finishing tool for finishing. A rotating shaft 32 is fixedly mounted on the CNC cutting head 35. A limiting ring 31 is sleeved on the outer wall of the rotating shaft 32, and four circumferentially evenly spaced fixing rods 30 are fixedly mounted on the limiting ring 31. A limiting platform 24 is fixedly mounted on the upper end of the four fixing rods 30. A rotary motor 23 that drives the limiting platform 24 to rotate is fixedly mounted on the upper end of the limiting platform 24. A fixed platform 22 that drives the rotary motor 23 to move up and down is fixedly mounted on the rotary motor 23. The CNC cutting head 35 can change different cutting edges through the fixed platform 22, thereby adjusting and changing different cutting edges to achieve different functions.

[0022] Two symmetrically arranged electromagnetic rails 2 are fixedly installed on the base plate 1. Electric sliders 3 are slidably mounted on both electromagnetic rails 2. Fixed posts 4 are fixedly installed on the upper ends of both electric sliders 3. Mounting frames 5 are fixedly installed on the upper ends of both fixed posts 4. A first lead screw 6 is rotatably mounted inside the mounting frame 5. A drive motor 7 for driving the first lead screw 6 to rotate is fixedly installed on the outer wall of the mounting frame 5. A first sliding block 8 is threaded onto the outer wall of the first lead screw 6 and is slidably mounted inside the mounting frame 5. Symmetrically arranged sliding grooves 10 are opened on both sides of the inner wall of the mounting frame 5. Guide rails 11 are fixedly installed in both sliding grooves 10 and rollers 9 are rolled on both guide rails 11. The rollers 9 change the contact friction of the first sliding block 8 into rolling friction, reducing the friction of the first sliding block 8 and preventing the first sliding block 8 from stopping due to a sudden increase in friction when moving.

[0023] Both pulleys 9 are rotatably mounted on both sides of the first sliding block 8 via a rotating shaft. A movable plate 12 is fixedly mounted on the bottom of the first sliding block 8. Four equally spaced support rods 13 are fixedly mounted on the bottom of the movable plate 12. A mounting plate 14 is fixedly mounted on the bottom of the four support rods 13. A first servo motor 15 is fixedly mounted on the mounting plate 14 relative to the four support rods 13. A transverse bevel gear 16 is fixedly mounted on the output end of the first servo motor 15.

[0024] The bottom of the movable plate 12 is also fixedly installed with four equally spaced fixed frames 17. A second lead screw 18 is rotatably installed in each of the four fixed frames 17, and a vertical bevel gear 19 is fixedly installed on the outer wall of each of the four second lead screws 18. The four vertical bevel gears 19 are meshed with the horizontal bevel gear 16, and the four vertical bevel gears 19 are equidistantly arranged on the outer wall of the horizontal bevel gear 16.

[0025] The outer walls of the four second lead screws 18 are each fitted with a second sliding block 20 by thread, and the four second sliding blocks 20 are respectively slidably disposed in the four fixed frames 17. The bottom ends of the four second sliding blocks 20 are rotatably mounted with connecting rods 21 by pins, and the bottom ends of the four connecting rods 21 are rotatably connected to the fixed platform 22 by pins.

[0026] The limiting platform 24 has four T-shaped slide grooves 25 that are evenly spaced around the circumference. A third lead screw 26 is rotatably installed in each of the four T-shaped slide grooves 25. The outer walls of the four third lead screws 26 are threaded with limiting clamping blocks 27. The outer walls of the limiting platform 24 are fixedly installed with four second servo motors 28 that drive the four third lead screws 26 to rotate.

[0027] The bottom of the limiting platform 24 is fixedly installed with four equidistant positioning rods 29, and the upper end of the rotating shaft 32 is provided with four positioning grooves 34 for placing the positioning rods 29. The positioning rods 29 improve the stability of the rotating shaft 32 during rotation and quickly position the installation position of the rotating shaft 32, reducing the time consumed by positioning.

[0028] The outer wall of the rotating shaft 32 is provided with four circumferentially divided limiting grooves 33. The bottom ends of the four limiting clamping blocks 27 are respectively slidably disposed in the four limiting grooves 33. The rotating shaft 32 is limited and fixed by the limiting clamping blocks 27 moving into the limiting grooves 33. The output end of the rotary motor 23 drives the limiting stage 24 to rotate, so that the CNC cutter head 35 can rotate and cut the mold.

[0029] It should be noted that the specific models and specifications of the electromagnetic guide rail 2 and the electric slider 3 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated here.

[0030] The above methods for using multi-purpose CNC cutting heads are used to illustrate their functional principles: In use, the output end of the first servo motor 15 drives the horizontal bevel gear 16 to rotate. When the horizontal bevel gear 16 rotates, it drives the four meshing vertical bevel gears 19 to rotate. The four vertical bevel gears 19 drive the four second lead screws 18 to rotate respectively. Adjust the second sliding block 20 to slide within the fixed frame 17. Adjust the angle between the connecting rod 21 and the second lead screw 18 so that the other end of the connecting rod 21 pushes the fixed table 22 to move vertically up and down. Adjust the height of the CNC cutter head 35 and switch different cutting edges to achieve different functions. When it is necessary to change to a different CNC cutting head 35, the output end of the second servo motor 28 drives the third lead screw 26 to rotate, adjust the position of the limit clamping block 27 in the T-shaped slide groove 25, so that the limit clamping block 27 moves towards the second servo motor 28. When the limit clamping block 27 moves, it slides out from the limit groove 33, releases the limit on the rotating shaft 32, and quickly changes the CNC cutting head 35. When the mold is being cut, the first lead screw 6 is rotated by the output end of the drive motor 7, causing the first sliding block 8 to slide within the mounting frame 5. It then rolls on the guide rail 11 via the pulley 9, reducing the friction force on the first sliding block 8 as it moves. This makes the movement of the first sliding block 8 and the moving plate 12 smoother, increasing the precision of the mold processing.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-purpose CNC cutting head, comprising a base plate (1) and a CNC cutting head (35) disposed on the base plate (1), characterized in that, The CNC cutter head (35) has two parallel cutting edges (36) and two cutting edges (37). The first cutting edge (36) is a blanking cutter for preliminary cutting and shaping, and the second cutting edge (37) is a finishing cutter for finishing. [2] A rotating shaft (32) is fixedly installed on the CNC cutter head (35). A limiting ring (31) is sleeved on the outer wall of the rotating shaft (32), and four circumferentially divided fixing rods (30) are fixedly installed on the limiting ring (31). A limiting platform (24) is fixedly installed on the upper end of the four fixing rods (30). A rotary motor (23) that drives the limiting platform (24) to rotate is fixedly installed on the upper end of the limiting platform (24). A fixed platform (22) that drives the rotary motor (23) to move up and down is fixedly installed on the rotary motor (23). The CNC cutter head (35) can change different cutting edges through the fixed platform (22).

2. The multi-purpose CNC cutting head according to claim 1, characterized in that, Two symmetrically arranged electromagnetic rails (2) are fixedly installed on the base plate (1). Electric sliders (3) are slidably arranged on both electromagnetic rails (2). Fixed columns (4) are fixedly installed on the upper ends of both electric sliders (3). A mounting frame (5) is fixedly installed on the upper ends of both fixed columns (4).

3. A multi-purpose CNC cutting head according to claim 2, characterized in that, The first lead screw (6) is rotatably installed inside the mounting frame (5). A drive motor (7) for driving the first lead screw (6) to rotate is fixedly installed on the outer wall of the mounting frame (5). A first sliding block (8) is threadedly sleeved on the outer wall of the first lead screw (6), and the first sliding block (8) is slidably disposed inside the mounting frame (5). A symmetrical sliding groove (10) is opened on both sides of the inner wall of the mounting frame (5). A guide rail (11) is fixedly installed in both sliding grooves (10), and a pulley (9) is rolled on both guide rails (11).

4. A multi-purpose CNC cutting head according to claim 3, characterized in that, Both pulleys (9) are rotatably mounted on both sides of the first sliding block (8) via a rotating shaft. A movable plate (12) is fixedly mounted on the bottom of the first sliding block (8). Four equally spaced support rods (13) are fixedly mounted on the bottom of the movable plate (12). A mounting plate (14) is fixedly mounted on the bottom of the four support rods (13). A first servo motor (15) is fixedly mounted on the mounting plate (14) relative to the four support rods (13). A transverse bevel gear (16) is fixedly mounted on the output end of the first servo motor (15).

5. A multi-purpose CNC cutting head according to claim 4, characterized in that, The bottom of the movable plate (12) is also fixedly installed with four equally spaced fixed frames (17). Each of the four fixed frames (17) is rotatably installed with a second lead screw (18), and each of the four second lead screws (18) is fixedly installed with a vertical bevel gear (19) on the outer wall of the fixed frame (17). Each of the four vertical bevel gears (19) is meshed with a horizontal bevel gear (16), and the four vertical bevel gears (19) are circumferentially arranged on the outer wall of the horizontal bevel gear (16).

6. A multi-purpose CNC cutting head according to claim 5, characterized in that, The outer walls of the four second lead screws (18) are all fitted with second sliding blocks (20) by thread, and the four second sliding blocks (20) are respectively slidably set in the four fixed frames (17). The bottom ends of the four second sliding blocks (20) are rotatably mounted with connecting rods (21) by pins. The bottom ends of the four connecting rods (21) are rotatably connected by pins and fixed platforms (22).

7. A multi-purpose CNC tool head according to claim 6, characterized in that, The limiting platform (24) has four T-shaped slide grooves (25) that are evenly spaced around the circumference. Each of the four T-shaped slide grooves (25) has a third lead screw (26) rotatably installed in it. Each of the four third lead screws (26) has a limiting clamping block (27) threaded onto its outer wall. The limiting platform (24) has four second servo motors (28) that drive the four third lead screws (26) to rotate, respectively.

8. A multi-purpose CNC cutting head according to claim 7, characterized in that, The bottom of the limiting platform (24) is fixedly installed with four equidistant positioning rods (29), and the upper end of the rotating shaft (32) is provided with four positioning grooves (34) for placing the positioning rods (29).

9. A multi-purpose CNC cutting head according to claim 8, characterized in that, The outer wall of the rotating shaft (32) is provided with four circumferentially divided limiting grooves (33), and the bottom ends of the four limiting clamping blocks (27) are respectively slidably disposed in the four limiting grooves (33).

10. A method of using a multi-purpose CNC cutting head as described in claim 9, characterized in that, The method of use includes the following steps: Step S1: The horizontal bevel gear (16) is driven to rotate by the output end of the first servo motor (15). When the horizontal bevel gear (16) rotates, it drives four meshing vertical bevel gears (19) to rotate. The four vertical bevel gears (19) drive four second lead screws (18) to rotate respectively. The second sliding block (20) is adjusted to slide in the fixed frame (17). The angle between the connecting rod (21) and the second lead screw (18) is adjusted so that the other end of the connecting rod (21) pushes the fixed table (22) to move vertically up and down. The height of the CNC cutter head (35) is adjusted, and different cutting edges are switched to achieve different functions. Step S2: When it is necessary to change to a different CNC cutting head (35), the output end of the second servo motor (28) drives the third lead screw (26) to rotate, adjust the position of the limit clamping block (27) in the T-shaped slide (25), so that the limit clamping block (27) moves towards the second servo motor (28). When the limit clamping block (27) moves, it slides out from the limit groove (33), releases the limit on the rotating shaft (32), and quickly changes the CNC cutting head (35). In step S3, when the mold is being cut, the first lead screw (6) is rotated by the output end of the drive motor (7), so that the first sliding block (8) slides in the mounting frame (5) and rolls on the guide rail (11) through the pulley (9), reducing the friction force on the first sliding block (8) when it moves, making the first sliding block (8) move the moving plate (12) more smoothly, and increasing the accuracy of mold processing.

Images