Milling cutter for high-precision dynamic cutting

Abstract

The utility model is applicable to the technical field of milling cutters, and provides a milling cutter for high-precision dynamic cutting, which comprises a cutter head assembly, the cutter head assembly is arranged along the horizontal direction, a cutter handle assembly is arranged at one end of the cutter head assembly, the cutter handle assembly is arranged along the horizontal direction, and the cutter handle assembly is cylindrical; the cutter handle assembly comprises a cutter handle body connected with the cutter head assembly. The device solves the problems that in the actual production process of the four-edge milling cutter, the precision cannot be guaranteed, meanwhile, high rigidity cannot be provided, and balance between the precision and the rigidity is difficult to achieve, the milling cutter can be more stable in the cutting process through accurate angle setting, vibration can be reduced, and particularly, the machining efficiency is improved in the finish machining operation. Due to the fact that the number of the blades of the milling cutter is large and the angles of the blades are attached, higher rigidity can be provided, larger cutting force can be borne, and the purpose of improving the production precision of workpieces is achieved.

Description

Technical Field

[0001] This utility model relates to the field of milling cutter technology, and more specifically, to a high-precision dynamic cutting milling cutter. Background Technology

[0002] A milling cutter is a rotating cutting tool with one or more cutting teeth used for milling operations. The milling cutter cuts the workpiece through its cutting edges; the rotation of the cutter combined with the movement of the workpiece removes material. Milling cutters are mainly used on milling machines to machine planes, steps, grooves, shaped surfaces, and cut off workpieces.

[0003] The precision of a milling cutter is a crucial factor in evaluating its quality, directly determining the quality of the machined products, especially for high-precision parts. Milling cutter precision refers to the dimensional accuracy and surface quality that the cutter can achieve during machining. This precision includes indicators such as contour accuracy, flatness, perpendicularity, and surface finish. Milling cutter precision is a key performance indicator, directly impacting the quality and consistency of the machined parts.

[0004] In actual production, four-flute end mills are generally used for machining workpieces requiring high surface smoothness. Four-flute end mills provide better surface finish because more cutting edges participate in the cutting, distributing the cutting force and reducing the cutting load on individual edges. The clearance angle of the end mill controls the contact angle between each cutting edge and the workpiece surface. By changing different clearance angles, different machining effects can be achieved. Precise angle settings make the end mill more stable during cutting, reducing vibration. Especially in finishing operations, the end mill, due to its numerous and closely spaced cutting edges, provides higher rigidity, making it suitable for withstanding greater cutting forces, thereby improving the production accuracy of the workpiece. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a high-precision dynamic cutting milling cutter with four sets of cutting edges and the four sets of cutting edges are closely spaced, which can provide higher rigidity and is suitable for withstanding greater cutting forces.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A high-precision dynamic cutting milling cutter includes a cutter head assembly arranged horizontally, and a tool holder assembly arranged horizontally at one end of the cutter head assembly. The tool holder assembly is cylindrical. The tool holder assembly includes a tool holder body connected to the cutter head assembly.

[0008] The present invention is further configured such that: the cutter head assembly is arranged in a horizontal direction, the cutter head assembly is configured as a threaded cylinder, the diameter of the cutter head assembly is set as i, the value of i is 8±0.003mm, and the length of the cutter head assembly is set as f, the value of f is 20±0.15mm.

[0009] The present invention is further configured such that: the cutter head assembly includes a cutter head core, the cutter head core is cylindrical, the outer wall of the cutter head core is provided with four sets of cutting edges, the four sets of cutting edges are arranged in a circular array along the outer wall of the cutter head core, and a chip groove is provided at the interval between every two sets of cutting edges, the width of the chip groove is set to b, and the value of b is 1.52-1.68mm.

[0010] By adopting the above technical solution, a chip groove is provided at the interval between every two sets of cutting edges. The width of the chip groove is set to b, and the value of b is 1.52-1.68mm. The chip groove provides a space for the chips, so that they can be effectively collected during the cutting process. Moreover, the shape of the chip groove can ensure that the chips collected inside it can avoid cutting interruption caused by chip blockage or accumulation.

[0011] The present invention is further configured such that: the blade includes a blade angle, the front angle of the blade angle is set to d, the value of d is set to 10°-12°, a bottom edge is provided at the bottom of the blade angle, the bottom edge is arranged in a vertical direction, the blade tip thickness of the bottom edge is set to a, the value of a is 0.2±0.02mm, and a bottom edge groove is provided at the bottom of the bottom edge.

[0012] By adopting the above technical solution, a bottom cutting edge is provided at the bottom of the cutter corner. The bottom cutting edge is set vertically, and the thickness of the bottom cutting edge tip is set to 'a', with a value of 0.2 ± 0.02 mm. The tip thickness affects the cutting performance and machining quality during the milling process. The tip thickness can reduce burrs generated on the workpiece surface during milling. The tip thickness affects the distribution of cutting force. A larger tip thickness can reduce local cutting force, thereby reducing damage to the workpiece and the tool. However, a smaller principal cutting edge angle can make the cutting layer thickness thinner, thereby reducing the cutting resistance per unit cutting edge length and extending tool life. Therefore, setting the tip thickness to 0.2 ± 0.02 mm can ensure the machining effect of the milling cutter while also ensuring a longer tool life. A bottom cutting edge groove is provided at the bottom of the bottom cutting edge. The bottom cutting edge groove, together with the bottom cutting edge, allows the device to fit more tightly with the workpiece, thus making the machining effect of the device even better.

[0013] The present invention is further configured such that: the blade sidewall is provided with an outer peripheral blade, the outer peripheral blade is configured as a curved rectangle, the normal arc width of the outer peripheral blade is set to e, the value of e is 0.8mm, and the first rear angle of the outer peripheral blade is c, the value of c is 11°±1°.

[0014] By adopting the above technical solution, the normal arc width of the outer peripheral cutting edge is set to e, with a value of 0.8 mm. The normal arc width determines the contact area between the milling cutter and the workpiece, affecting the magnitude and distribution of the cutting force. A larger normal arc width can improve cutting efficiency because it allows more material to be removed in a single cutting process. The first clearance angle of the outer peripheral cutting edge is c, with a value of 11°±1°. The clearance angle is the angle between the back of the cutting edge and the cutting plane. It helps to reduce friction between the tool and the workpiece contact surface, improving tool durability and the quality of the machined surface.

[0015] The present invention is further configured such that: the handle body is arranged in a horizontal direction, and a handle connecting plate is provided at the end of the handle body away from the blade assembly; the handle connecting plate is adapted to the shape of the handle body; the handle connecting plate is cylindrical; and the diameter of the end of the handle connecting plate near the handle body is larger than the diameter of the end away from the handle body.

[0016] In summary, this application includes at least one of the following beneficial technical effects of high-precision dynamic cutting milling cutters:

[0017] 1. A chip groove is provided at the interval between every two sets of cutting edges. The width of the chip groove is set to b, and the value of b is 1.52-1.68mm. The chip groove provides a space for the chips, so that they can be effectively collected during the cutting process. The shape of the chip groove can ensure that the chips collected inside it can avoid cutting interruption caused by chip blockage or accumulation.

[0018] 2. A bottom cutting edge is provided at the bottom of the cutter corner, positioned vertically. The thickness of the bottom cutting edge tip is set to 'a', with a value of 0.2 ± 0.02 mm. The tip thickness affects the cutting performance and machining quality during milling. Thickness reduces burrs on the workpiece surface during milling and influences the distribution of cutting forces. A larger tip thickness reduces localized cutting forces, thus reducing damage to the workpiece and tool. Conversely, a smaller principal cutting edge angle results in a thinner cutting layer, reducing cutting resistance per unit cutting edge length and extending tool life. Therefore, setting the tip thickness to 0.2 ± 0.02 mm ensures both good machining performance and a long cutter life. A bottom cutting edge groove is provided at the bottom of the bottom cutting edge. This groove, combined with the bottom cutting edge, allows for a tighter fit between the device and the workpiece, resulting in superior machining performance.

[0019] 3. The normal arc width of the outer peripheral cutting edge is set to e, with a value of 0.8 mm. The normal arc width determines the contact area between the milling cutter and the workpiece, affecting the magnitude and distribution of the cutting force. A larger normal arc width can improve cutting efficiency because it allows more material to be removed in a single cutting operation. The first clearance angle of the outer peripheral cutting edge is c, with a value of 11°±1°. The clearance angle is the angle between the back of the cutting edge and the cutting plane. It helps reduce friction between the tool and the workpiece contact surface, improving tool durability and the quality of the machined surface. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the high-precision dynamic cutting milling cutter of this utility model.

[0021] Figure 2 This is a schematic diagram of the cutter head assembly in this utility model.

[0022] Figure 3 for Figure 2 The right view.

[0023] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0024] Explanation of reference numerals in the attached drawings: 1. Cutting head assembly; 11. Cutting edge; 111. Cutting angle; 112. Bottom cutting edge; 113. Bottom cutting edge groove; 114. Outer peripheral cutting edge; 12. Cutting head core; 13. Chip groove;

[0025] 2. Tool holder assembly; 21. Tool holder body; 22. Tool holder connecting plate. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] Example 1, please refer to Figure 1-4 The present invention provides the following technical solution:

[0029] Specifically, it refers to a high-precision dynamic cutting milling cutter, see [link / reference]. Figure 1The system includes a cutter head assembly 1, which is horizontally positioned and can fit against the surface of a workpiece. By rotating, the cutter head assembly grinds the workpiece surface, thus achieving surface machining. A tool holder assembly 2 is located at one end of the cutter head assembly 1. The tool holder assembly 2 is horizontally positioned and cylindrical. The tool holder assembly 2 provides the mounting environment for the cutter head assembly 1 and ensures stable operation of the cutter head assembly 1 during actual use, preventing displacement or detachment.

[0030] See Figure 1 , Figure 2 The cutter head assembly 1 is arranged horizontally and is a threaded cylindrical shape. The diameter of the cutter head assembly 1 is set as i, with a value of 8±0.003mm, and the length of the cutter head assembly 1 is set as f, with a value of 20±0.15mm. The cutter head assembly 1 includes a cutter core 12, which is cylindrical. Four sets of cutting edges 11 are arranged on the outer wall of the cutter core 12, forming a ring array around the outer wall. The cutter core 12 provides an installation environment for the four sets of cutting edges 11, ensuring stable operation and preventing them from falling off during actual use. A chip groove 13 is provided at the interval between every two sets of cutting edges 11. The width of the chip groove 13 is set as b, with a value of 1.52-1.68mm. The chip groove 13 provides a space for chips, allowing them to be effectively collected during cutting. Furthermore, the shape of the chip groove 13 ensures that the collected chips are collected within it, preventing cutting interruptions caused by chip blockage or accumulation.

[0031] See Figure 2 , Figure 3The cutting edge 11 includes a cutting angle 111, with a rake angle of d set to 10°-12°. The rake angle is the angle between the cutting edge and the base surface. Increasing the rake angle makes the cutting edge sharper, reduces cutting force and heat, and improves the quality of the machined surface. However, an excessively large rake angle may reduce the strength of the cutting edge. Therefore, setting the rake angle to 10°-12° ensures that the device is sharper while maintaining strength. A bottom cutting edge 112 is provided at the bottom of the cutting angle 111. The bottom cutting edge 112 is set vertically, and the tip thickness of the bottom cutting edge 112 is set to a, with a value of 0.2±0.02mm. The tip thickness affects the cutting performance and machining quality during milling. The tip thickness can reduce burrs generated on the workpiece surface during milling. The tip thickness affects the distribution of cutting force. A larger tip thickness can reduce local cutting force, thereby reducing damage to the workpiece and tool. However, a smaller principal cutting edge angle can make the cutting layer thinner, thereby reducing the cutting resistance per unit cutting edge length and extending tool life. Setting the tip thickness to 0.2±0.02mm ensures both the machining effect and long service life of the milling cutter. The bottom edge 112 has a bottom edge groove 113, which, in conjunction with the bottom edge 11, allows for a tighter fit between the device and the workpiece, resulting in superior machining performance.

[0032] See Figure 4 The cutting edge 11 has an outer peripheral cutting edge 114 on its sidewall. The outer peripheral cutting edge 114 is a curved rectangle with a normal arc width of 'e' (0.8 mm). This normal arc width determines the contact area between the milling cutter and the workpiece, affecting the magnitude and distribution of the cutting force. A larger normal arc width can improve cutting efficiency because it allows more material to be removed in a single cut. The first clearance angle of the outer peripheral cutting edge 114 is 'c' (11° ± 1°). The clearance angle is the angle between the back of the cutting edge and the cutting plane. It helps reduce friction between the tool and the workpiece contact surface, improving tool durability and the quality of the machined surface.

[0033] See Figure 2 The tool holder assembly 2 includes a tool holder body 21 connected to the cutter head assembly 1. The tool holder body 21 is arranged horizontally and is cylindrical. A tool holder connecting plate 22 is provided at the end of the tool holder body 21 away from the cutter head assembly 1. The tool holder connecting plate 22 is adapted to the shape of the tool holder body 21 and is cylindrical. The diameter of the end of the tool holder connecting plate 22 near the tool holder body 21 is larger than the diameter of the end away from the tool holder body 21. The tool holder connecting plate 22 ensures that the tool holder assembly 2 and the cutter head assembly 1 can be stably connected to the milling cutter machine tool during actual use without falling off, thus improving production safety.

[0034] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A high-precision dynamic cutting milling cutter, characterized in that: It includes a cutting head assembly (1), which is arranged in a horizontal direction, and a handle assembly (2) is provided at one end of the cutting head assembly (1), which is arranged in a horizontal direction and is cylindrical; The tool holder assembly (2) includes a tool holder body (21) connected to the tool head assembly (1).

2. The high-precision dynamic cutting milling cutter according to claim 1, characterized in that: The cutter head assembly (1) is arranged in a horizontal direction. The cutter head assembly (1) is configured as a threaded cylinder. The diameter of the cutter head assembly (1) is set to i, where i is 8±0.003mm. The length of the cutter head assembly (1) is set to f, where f is 20±0.15mm.

3. A high-precision dynamic cutting milling cutter according to claim 2, characterized in that: The cutter head assembly (1) includes a cutter head core (12), which is cylindrical. The outer wall of the cutter head core (12) is provided with four sets of cutting edges (11). The four sets of cutting edges (11) are arranged in a circular array around the outer wall of the cutter head core (12). A chip groove (13) is provided at the interval between every two sets of cutting edges (11). The width of the chip groove (13) is set to b, and the value of b is 1.52-1.68 mm.

4. A high-precision dynamic cutting milling cutter according to claim 3, characterized in that: The blade (11) includes a blade angle (111), the front angle of the blade angle (111) is set to d, the value of d is set to 10°-12°, the bottom of the blade angle (111) is provided with a bottom edge (112), the bottom edge (112) is set in the vertical direction, the blade tip thickness of the bottom edge (112) is set to a, the value of a is 0.2±0.02mm, and the bottom of the bottom edge (112) is provided with a bottom edge groove (113).

5. A high-precision dynamic cutting milling cutter according to claim 4, characterized in that: The blade (11) has an outer peripheral blade (114) on its side wall. The outer peripheral blade (114) is a curved rectangle. The normal arc width of the outer peripheral blade (114) is set to e, and the value of e is 0.8 mm. The back angle of the outer peripheral blade (114) is c, and the value of c is 11°±1°.

6. A high-precision dynamic cutting milling cutter according to claim 1, characterized in that: The handle body (21) is arranged in a horizontal direction. A handle connecting plate (22) is provided at the end of the handle body (21) away from the cutter head assembly (1). The handle connecting plate (22) is adapted to the shape of the handle body (21). The handle connecting plate (22) is cylindrical. The diameter of the end of the handle connecting plate (22) near the handle body (21) is larger than the diameter of the end away from the handle body (21).

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