High-precision cutter for numerical control milling machine

Abstract

The utility model belongs to the technical field of numerical control cutters, particularly relates to a high-precision cutter for a numerical control milling machine, and aims to solve the problems of large cutting resistance, serious cutter abrasion and high maintenance cost in the background technology. A first primary cutter part, a second primary cutter part and a secondary cutter part are arranged on the outer wall of the cutter holder, the second primary cutter part is arranged at the top of one side of the first primary cutter part, and the secondary cutter part is located at one end of the second primary cutter part. The whole cutter adopts a multi-stage cutter part step-by-step cutting design, and can effectively disperse cutting resistance and reduce the load of a single cutting edge through step-type layered cutting, so that vibration and abrasion are reduced, the machining precision is improved, the service life of the cutter is prolonged, a user can quickly replace or adjust specific parts according to machining requirements, and the machining efficiency is improved. The cutter does not need to be integrally replaced, and maintenance cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of CNC cutting tool technology, and in particular to a high-precision cutting tool for CNC milling machines. Background Technology

[0002] High-precision cutting tools for CNC milling machines are core tools in the field of CNC machining, completing the machining of complex parts through high-speed rotation and precise cutting. These tools typically consist of a tool holder, tool shank, tool head, and cutting components, and must possess high rigidity, high wear resistance, and excellent chip removal performance to meet the demands of high-precision machining. As the manufacturing industry's requirements for machining efficiency and quality increase, traditional cutting tools are gradually revealing their limitations in terms of structural design, service life, and maintenance costs.

[0003] In existing technologies, CNC milling machine cutting tools mostly adopt a one-piece, fixed structure. While this design ensures overall rigidity, it has some shortcomings in use:

[0004] First, the cutting resistance is high and the tool wear is severe: the cutting parts of the one-piece tool are fixed and cannot be adjusted, and the cutting force is concentrated during the machining process. Especially when machining hard materials or complex curved surfaces, vibration and stress concentration are easy to occur, which leads to a decline in the quality of the machined surface. Since the cutting edge lacks segmented design, the wear area is concentrated in a single position, the tool life is greatly shortened, and frequent replacement increases the cost of use.

[0005] High maintenance costs: When the integrated structure is damaged, the whole structure needs to be replaced, and local repairs or adjustments are not possible, resulting in waste of resources and increased costs. Utility Model Content

[0006] In view of the shortcomings of the prior art, this utility model provides a high-precision cutting tool for CNC milling machines, which overcomes the shortcomings of the prior art and effectively solves the problems of high cutting resistance, severe tool wear and high maintenance costs.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A high-precision cutting tool for a CNC milling machine includes a mounting sleeve. A tool holder is provided on the outer wall of one end of the mounting sleeve, and a first-stage cutting tool, a second-stage cutting tool, and a second-stage cutting tool are respectively provided on the outer wall of the tool holder. The second-stage cutting tool is located on the top side of one side of the first-stage cutting tool, and the second-stage cutting tool is located at one end of the second-stage cutting tool. The first-stage cutting tool, the second-stage cutting tool, and the second-stage cutting tool include a cutting plate, a cutting tool fixedly connected to the top outer wall of the cutting plate by screws, and an arc-shaped positioning block provided on the outer wall of one end of the cutting plate. A slanted groove is formed on the top outer wall of the cutting plate, and the slanted groove is fixedly connected to the outer wall of the tool holder by screws.

[0009] Preferably, the tool holder includes a tool handle, a tool shank, and a tool head, wherein the tool handle is slidably connected to the inner wall of the mounting sleeve, and the tool handle and the mounting sleeve are fixedly connected by screws, the tool shank is welded to the outer wall of one end of the tool handle, and the tool head is welded to the outer wall of one end of the tool shank.

[0010] Preferably, a first chip discharge port is provided on one side of the outer wall of the tool holder and the tool head.

[0011] Preferably, a second chip discharge port is provided on the outer wall of the other side of the tool holder and the tool head.

[0012] Preferably, the first chip discharge port and the second chip discharge port are both provided with a first mounting groove on the outer wall of the tool holder, and the first primary cutting blade and the second primary cutting blade are both fixedly connected to the inner wall of the first mounting groove by screws.

[0013] Preferably, the first chip discharge port is provided with a second mounting groove on the outer wall of the cutter head, and the secondary cutting blade is fixedly connected to the inner wall of the second mounting groove by screws.

[0014] Preferably, a water injection hole is provided at the center of the outer wall of one end of the tool holder, and water cooling holes are provided on the inner walls of the first chip removal port and the second chip removal port, and the water injection hole and the water cooling hole are interconnected.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. The high-precision cutting tool for CNC milling machine designed in this paper adopts a multi-stage cutting design. The second stage cutting tool performs preliminary cutting to disperse the cutting force. The first and second stage cutting tools perform the remaining cutting operation on the workpiece to complete the finishing. Through the stepped layer cutting, the cutting resistance can be effectively dispersed, the load on the single cutting edge can be reduced, thereby reducing vibration and wear, and improving machining accuracy and tool life.

[0017] 2. The high-precision cutting tool for CNC milling machines designed in this paper adopts a split installation design between the first-stage cutting tool, the second-stage cutting tool, the second-stage cutting tool and the first and second mounting slots. Furthermore, the cutting tools on the tool plate are also fixed with screws. Users can quickly replace or adjust specific components according to processing needs without replacing the entire tool, which effectively reduces maintenance costs. Attached Figure Description

[0018] Figure 1 A three-dimensional schematic diagram of the overall structure of a high-precision cutting tool for a CNC milling machine proposed in this utility model. Figure 1 ;

[0019] Figure 2 A three-dimensional schematic diagram of the overall structure of a high-precision cutting tool for a CNC milling machine proposed in this utility model. Figure 2 ;

[0020] Figure 3 This is a schematic diagram showing the overall structure of a high-precision cutting tool for a CNC milling machine proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the tool plate connection structure for a high-precision tool for a CNC milling machine proposed in this utility model.

[0022] In the diagram: 1. Mounting sleeve; 2. Tool holder; 3. First-stage cutting tool; 4. Second-stage cutting tool; 5. Second-stage cutting tool; 6. Tool holder; 7. Tool shank; 8. Tool head; 9. Tool plate; 10. Cutting tool; 11. Arc-shaped positioning block; 12. Inclined groove; 13. First chip removal port; 14. Second chip removal port; 15. First mounting groove; 16. Second mounting groove; 17. Water injection hole; 18. Water cooling hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figures 1-4 In Embodiment 1, a high-precision cutting tool for a CNC milling machine includes a mounting sleeve 1. A tool holder 2 is provided on the outer wall of one end of the mounting sleeve 1. A first-stage cutting tool 3, a second-stage cutting tool 4, and a second-stage cutting tool 5 are respectively provided on the outer wall of the tool holder 2. The second-stage cutting tool 4 is located on the top of one side of the first-stage cutting tool 3, and the second-stage cutting tool 5 is located at one end of the second-stage cutting tool 4. The tool holder 2 includes a tool shank 6, a tool bar 7, and a cutting head 8. The tool shank 6 is slidably connected to the inner wall of the mounting sleeve 1, and the tool shank 6 and the mounting sleeve 1 are fixedly connected by screws. The tool bar 7 is welded to the outer wall of one end of the tool shank 6, and the cutting head 8 is welded to the outer wall of one end of the tool bar 7.

[0025] Mounting sleeve 1 is fixed to tool holder 2 via sliding connection of tool holder 6. Tool holder 2 has a first primary cutting tool 3, a second primary cutting tool 4 and a second secondary cutting tool 5 on its outer wall. The tool bar 7 and the tool head 8 have a first chip removal port 13 and a second chip removal port 14 on their respective sides. The first mounting groove 15 is located on the outer wall of the tool bar 7 and is used to fix the first primary cutting tool 3 and the second primary cutting tool 4. The second mounting groove 16 is located on the outer wall of the tool head 8 and is used to fix the second secondary cutting tool 5. During assembly, different cutting tools can be quickly disassembled or replaced by adjusting the tightness of the screws to adapt to different processing needs.

[0026] In this embodiment, the tool adopts a multi-stage cutting design with multiple cutting components. The second-stage cutting component 5 performs preliminary cutting to disperse the cutting force. The first-stage cutting component 3 and the second-stage cutting component 4 perform the remaining cutting operations on the workpiece to complete the finishing. Through stepped layered cutting, the cutting resistance can be effectively dispersed, the load on a single cutting edge can be reduced, thereby reducing vibration and wear, and improving machining accuracy and tool life.

[0027] Example 2: A high-precision cutting tool for a CNC milling machine, comprising a first-stage cutting tool 3, a second-stage cutting tool 4, and a second-stage cutting tool 5, including a cutting plate 9, a cutting tool 10 fixedly connected to the top outer wall of the cutting plate 9 by screws, and an arc-shaped positioning block 11 disposed on the outer wall of one end of the cutting plate 9. The top outer wall of the cutting plate 9 is provided with a slanted groove 12, and the slanted groove 12 is fixedly connected to the outer wall of the tool holder 2 by screws.

[0028] The blade plate 9 is fixed to the blade holder 2 by the inclined groove 12 and screws. The cutter 10 is made of cemented carbide and is fastened by screws to ensure the rigidity and replaceability of the cutting edge. The arc-shaped positioning block 11 is embedded in the groove of the blade holder 2 to achieve precise angle positioning.

[0029] In this embodiment, the first primary cutter 3, the second primary cutter 4, the second secondary cutter 5 and the first mounting groove 15 and the second mounting groove 16 are installed separately, and the cutter 10 on the cutter plate 9 is also fixed with screws. Users can quickly replace or adjust specific parts according to processing needs without replacing the entire tool, which effectively reduces maintenance costs.

[0030] A first chip removal port 13 is provided on one side of the outer wall of the cutter bar 7 and the cutter head 8, and a second chip removal port 14 is provided on the other side of the outer wall of the cutter bar 7 and the cutter head 8. A first mounting groove 15 is provided on the outer wall of the cutter bar 7 for both the first chip removal port 13 and the second chip removal port 14. The first primary cutting blade 3 and the second primary cutting blade 4 are both fixedly connected to the inner wall of the first mounting groove 15 by screws. A second mounting groove 16 is provided on the outer wall of the cutter head 8 for the first chip removal port 13, and the secondary cutting blade 5 is fixedly connected to the inner wall of the second mounting groove 16 by screws.

[0031] A water injection hole 17 is provided at the center of the outer wall of one end of the tool holder 6, and water cooling holes 18 are provided on the inner walls of the first chip removal port 13 and the second chip removal port 14. The water injection hole 17 and the water cooling hole 18 are interconnected.

[0032] The water injection hole 17 in the center of the tool holder 6 is connected to the water cooling hole 18 in the first chip removal port 13 and the second chip removal port 14. After the coolant is injected through the water injection hole 17, it is evenly distributed in the cutting area through the water cooling hole 18 to achieve efficient cooling.

[0033] Working principle:

[0034] During operation, the secondary cutting tool 5 first performs a small-scale cut on the workpiece to disperse the cutting force. The first-stage cutting tool 3 and the second-stage cutting tool 4 then perform the remaining cutting operation on the workpiece to complete the finishing process. During the cutting process, coolant enters the water cooling hole 18 through the water injection hole 17 to continuously cool and lubricate the cutting area. At the same time, the chips are discharged through the first chip removal port 13 and the second chip removal port 14.

[0035] If wear occurs at any point on the cutting blade, the corresponding screw can be loosened, and the blade plate 9 or the cutting blade 10 can be removed from the first mounting slot 15 and the second mounting slot 16 for replacement without disassembling the entire cutting tool assembly. The design of the inclined groove 12 and the arc-shaped positioning block 11 further improves the stability of the blade plate 9 during installation.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-precision cutting tool for a CNC milling machine, comprising a mounting sleeve (1), characterized in that, The mounting sleeve (1) has a knife holder (2) on one end of its outer wall, and the outer wall of the knife holder (2) is provided with a first-level cutting knife (3), a second-level cutting knife (4) and a second-level cutting knife (5). The second-level cutting knife (4) is located on the top of one side of the first-level cutting knife (3), and the second-level cutting knife (5) is located at one end of the second-level cutting knife (4). The first-level cutting knife (3), the second-level cutting knife (4) and the second-level cutting knife (5) include a knife plate (9), a cutting knife (10) fixedly connected to the top outer wall of the knife plate (9) by screws, and an arc-shaped positioning block (11) set on the outer wall of one end of the knife plate (9). The top outer wall of the knife plate (9) is provided with a slanted groove (12), and the slanted groove (12) is fixedly connected to the outer wall of the knife holder (2) by screws.

2. The high-precision cutting tool for a CNC milling machine according to claim 1, characterized in that, The tool holder (2) includes a tool handle (6), a tool bar (7), and a tool head (8). The tool handle (6) is slidably connected to the inner wall of the mounting sleeve (1), and the tool handle (6) and the mounting sleeve (1) are fixedly connected by screws. The tool bar (7) is welded to the outer wall of one end of the tool handle (6), and the tool head (8) is welded to the outer wall of one end of the tool bar (7).

3. A high-precision cutting tool for a CNC milling machine according to claim 2, characterized in that, The outer wall of one side of the tool holder (7) and the tool head (8) is provided with a first chip discharge port (13).

4. A high-precision cutting tool for a CNC milling machine according to claim 2, characterized in that, A second chip discharge port (14) is provided on the outer wall of the other side of the tool holder (7) and the tool head (8).

5. A high-precision cutting tool for a CNC milling machine according to claim 3, characterized in that, The first chip discharge port (13) and the second chip discharge port (14) are both provided with a first mounting groove (15) on the outer wall of the cutter bar (7), and the first primary cutting blade (3) and the second primary cutting blade (4) are both fixedly connected to the inner wall of the first mounting groove (15) by screws.

6. A high-precision cutting tool for a CNC milling machine according to claim 3, characterized in that, The first chip discharge port (13) is located on the outer wall of the cutter head (8) and a second mounting groove (16) is provided. The secondary cutting blade (5) is fixedly connected to the inner wall of the second mounting groove (16) by screws.

7. A high-precision cutting tool for a CNC milling machine according to claim 2, characterized in that, A water injection hole (17) is provided at the center of the outer wall of one end of the tool holder (6), and water cooling holes (18) are provided on the inner walls of the first chip removal port (13) and the second chip removal port (14). The water injection hole (17) and the water cooling hole (18) are interconnected.

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