Fast feed end mill
By designing the end edge of the fast-forward end milling cutter has an inner butterfly angle and an outer butterfly angle, combined with the rounded corner structure and a peripheral edge, the problem of difficulty in taking into account high precision and long service life in the prior art is solved, and the effect suitable for a variety of processing scenarios is achieved.
Patent Information
- Application Number
- CN202510222202.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-05-13
AI Technical Summary
The existing fast feed end milling cutters have insufficient design in terms of taking into account high precision and long service life, making them difficult to be suitable for a variety of processing scenarios.
A fast feed end milling cutter is designed, with the front end of the end edge protruding to form an inner butterfly angle and an outer butterfly angle. Combined with the rounded corner structure and the peripheral edge, the cutting force is decomposed into radial and axial components, extending the cutting edge and improving service life.
While achieving high-precision cutting processing, it extends the cutting edge, is suitable for a variety of processing scenarios, and reduces processing costs.
Smart Images
Figure CN119973191A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of tool technology, in particular to a fast-feed end milling cutter. Background Art
[0002] In the field of modern metal processing, fast feed end mills have become the preferred tool in many industrial application scenarios due to their efficient and precise cutting performance. In the prior art, the structural design of fast feed end mills is unreasonable, and it is difficult to achieve both high precision and long service life. Summary of the invention
[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a fast feed end milling cutter that can take into account both high precision and long service life.
[0004] An embodiment of the present invention provides a fast-feed end mill, which includes: a core, including an end face and an outer peripheral surface connected to each other; a cutting edge, including an end edge, a fillet structure and a peripheral edge, the end edge is arranged on the end face, the peripheral edge is arranged on the outer peripheral surface, the fillet structure connects the end edge and the peripheral edge, the front end of the end edge is relatively protruding so that the end edge has an inner butterfly angle and an outer butterfly angle, the opening of the inner butterfly angle faces the axis of the core, and the opening of the outer butterfly angle faces away from the axis of the core, the inner butterfly angle is 1.6°-2.4°, and the outer butterfly angle is 0.4°-0.6°, and in the axial direction of the core, the height of the front end of the end edge relative to the fillet structure is 0.0036mm-0.0054mm.
[0005] The fast feed end mill provided by the embodiment of the present invention has at least the following beneficial effects: By setting the front end of the end blade to be relatively convex so that the end blade has an inner butterfly angle and an outer butterfly angle, the part of the end blade corresponding to the outer butterfly angle can decompose the cutting force into two components, radial and axial, so that the rounded corner structure has a good service life while completing high-precision cutting processing. At the same time, the end blade design with double butterfly angles can effectively lengthen the cutting edge, making the width of the chips generated under the same feed of the tool thinner, and the force borne by a single point on the tool edge is smaller, so that it can be better suitable for fast feed rough processing. In addition, by setting the inner butterfly angle between 1.6°-2.4°, the outer butterfly angle between 0.4°-0.6°, and the height of the protrusion of the front end of the end blade relative to the rounded structure between 0.0036mm-0.0054mm, the height of the protrusion of the front end of the end blade is appropriate, while ensuring the processing accuracy and the strength of the cutting edge, the cutting edge can be fully lengthened to meet the service life requirements. Even after a certain degree of wear occurs in the fine machining, it can be suitable for fast feed rough machining scenarios, reducing the machining cost.
[0006] In one embodiment of this embodiment, the end edge has a first end edge back cutting edge face and a second end edge back cutting edge face, the first end edge back cutting edge face corresponding to a first end edge back angle of 5°-7°, and the second end edge back cutting edge face corresponding to a second end edge back angle of 13°-17°.
[0007] In an example of this implementation mode, the blade width of the end blade is 0.4mm-0.5mm.
[0008] In an example of this implementation manner, the radius of the rounded corner structure is 0.8 mm-1.0 mm.
[0009] In an example of this implementation manner, the core diameter of the core is 4.2 mm-5.4 mm.
[0010] In an example of this embodiment, the peripheral edge extends in an axial spiral along the core, and the helix angle is 25°-35°.
[0011] In an example of this implementation manner, the peripheral blade has a peripheral blade rake surface, and the peripheral blade rake angle corresponding to the peripheral blade rake surface is 0°-0.3°.
[0012] In one embodiment of this implementation mode, the number of the end edges is multiple, and a chip groove is formed between two adjacent peripheral edges. The bottom wall of the chip groove includes a connected arc surface and a plane. The chips formed by the peripheral edge cutting the workpiece can pass through the arc surface and the plane in sequence.
[0013] In one embodiment of this embodiment, the circumferential blade has a first circumferential blade back face and a second circumferential blade back face, the first circumferential blade back angle corresponding to the first circumferential blade back face is 10°-14°, and the second circumferential blade back angle corresponding to the second circumferential blade back face is 24°-32°.
[0014] In an example of this implementation manner, the first circumferential blade flank surface is a curved surface, and the second circumferential blade flank surface is a straight surface.
[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 It is a schematic diagram of the three-dimensional structure of a fast-feed end mill in one embodiment of an implementation mode of the present invention; Figure 2 yes Figure 1 Schematic diagram of the structure of the fast feed end mill in the front view direction; Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of region A; Figure 4 yes Figure 2 Schematic diagram of the enlarged structure of region B; Figure 5 yes Figure 2 Schematic diagram of the cross section of the fast feed end mill along the AA direction; Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of the C region.
[0017] Reference numerals: Fast feed end mill 100; core 10; end face 101; outer peripheral surface 102; chip groove 103; arc surface 1031; plane 1032; chip groove 104; cutting edge 20; end edge 21; first end edge flank 211; second end edge flank 212; end edge rake 213; fillet structure 22; peripheral edge 23; peripheral edge rake 231; first peripheral edge flank 232; second peripheral edge flank 233; inner butterfly angle A1; outer butterfly angle A2; height H; distance L; first end edge flank angle A3; second end edge flank angle A4; end edge rake angle A5; radius R; core diameter D; peripheral edge rake angle B1; first peripheral edge flank angle B2; second peripheral edge flank angle B3; helix angle C; shank 30; axis 91. DETAILED DESCRIPTION
[0018] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0019] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0020] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0021] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0022] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0023] See also Figures 1 to 3 , Figure 1 1 is a schematic diagram of the three-dimensional structure of a fast feed end mill 100 according to an embodiment of the present invention; Figure 2 yes Figure 1 A schematic structural diagram of a fast feed end mill 100 in a front view direction; Figure 3 yes Figure 2 The embodiment of the present invention provides a fast feed end mill 100, which includes a core 10 and a cutting edge 20. The core 10 includes an end face 101 and an outer peripheral face 102 connected to each other. The cutting edge 20 includes an end edge 21, a fillet structure 22 and a peripheral edge 23. The end blade 21 is arranged on the end face 101, the peripheral blade 23 is arranged on the outer peripheral face 102, the rounded structure 22 connects the end blade 21 and the peripheral blade 23, the front end of the end blade 21 is relatively protruding so that the end blade 21 has an inner butterfly angle A1 and an outer butterfly angle A2, the opening of the inner butterfly angle A1 faces the axis 91 of the core 10, and the opening of the outer butterfly angle A2 faces away from the axis 91 of the core 10, the inner butterfly angle A1 is 1.6°-2.4°, the outer butterfly angle A2 is 0.4°-0.6°, and in the axial direction of the core 10, the height H of the front end of the end blade 21 relative to the rounded structure 22 is 0.0036mm-0.0054mm.
[0024] It should be noted that the axial direction of the core 10 is parallel to the axis 91 of the core 10, and the radial direction of the core 10 is perpendicular to the axis 91 of the core 10. Specifically, the fast feed end mill 100 also includes a shank 30, which is connected to one end of the core 10 in the axial direction and is used to be installed on a machine tool. The end blade 21 is arranged on the end face 101 of the core 10 facing away from the shank 30. It can be understood that, when viewed in the radial direction, one end of the end blade 21 is relatively close to the axis 91 of the core 10, and the other end of the end blade 21 is relatively far away from the axis 91 of the core 10 and connected to the fillet structure 22, and a certain position (front end) in the middle of the end blade 21 is protruding in the direction away from the shank 30 relative to the two ends of the end blade 21 in the axial direction of the core 10 (that is, closer to the workpiece relative to the two ends of the end blade 21), thereby forming a double butterfly angle structure with an inner butterfly angle A1 and an outer butterfly angle A2.
[0025] Specifically, the inner butterfly angle A1 can be selected to be 1.6°, 1.8°, 2.0°, 2.4°, etc., preferably 2°, and the outer butterfly angle A2 can be selected to be 0.4°, 0.5°, 0.6°, etc., preferably 0.5°. The height H of the front end of the end blade 21 relative to the rounded structure 22 can be selected to be 0.0036mm, 0.0041mm, 0.0045mm, 0.0054mm, etc., preferably 0.0045mm.
[0026] It is understandable that when the inner butterfly angle A1 is less than 1.6° or greater than 2.4°, the cutting process of the end edge 21 will be affected, which is not conducive to fast feed roughing. When the outer butterfly angle A2 is less than 0.4°, the length of the cutting edge 20 cannot be fully extended. When the outer butterfly angle A2 is greater than 0.6°, the cutting accuracy of the rounded structure 22 will be reduced, making it difficult to apply to high-precision processing.
[0027] By setting the front end of the end edge 21 to be relatively convex so that the end edge 21 has an inner butterfly angle A1 and an outer butterfly angle A2, the part of the end edge 21 corresponding to the outer butterfly angle A2 can decompose the cutting force into two components, radial and axial, so that the rounded structure 22 has a good service life while completing high-precision cutting processing. At the same time, the double butterfly angle end edge 21 design can effectively lengthen the cutting edge 20, so that the width of the chips generated under the same feed of the tool is thinner, and the force borne by a single point on the tool edge is smaller, so that it can be better suitable for fast feed rough processing. In addition, by setting the inner butterfly angle A1 between 1.6°-2.4°, the outer butterfly angle A2 between 0.4°-0.6°, and the height H of the front end of the end edge 21 relative to the rounded structure 22 between 0.0036mm-0.0054mm, the height of the front end of the end edge 21 is appropriate, while ensuring the processing accuracy and the strength of the cutting edge, the cutting edge 20 can be fully lengthened to meet the service life requirements. Even after a certain degree of wear occurs in the fine machining, it can be suitable for fast feed rough machining scenarios, thereby reducing the machining cost.
[0028] In one embodiment of this implementation, please refer to Figure 2 and Figure 3 In the radial direction of the core 10, the distance L from the front end of the end edge 21 to the connection position of the end edge 21 and the rounded structure 22 is 0.5mm-0.7mm. Specifically, the distance L can be selected as 0.5mm, 0.6mm, 0.7mm, preferably 0.6mm. It can be understood that the above setting can extend the cutting edge 20 by 0.5mm-0.7mm, and the cutting edge 20 is extended by a suitable length, which can ensure the processing accuracy of the rounded structure 22 while fully improving the service life.
[0029] In one embodiment of this implementation, please refer to Figure 2 and Figure 4 , Figure 4 yes Figure 2 An enlarged structural diagram of the B area. The end edge 21 has a first end edge back cutting edge flank 211 and a second end edge back cutting edge flank 212. The first end edge back angle A3 corresponding to the first end edge back cutting edge 211 is 5°-7°, and the second end edge back angle A4 corresponding to the second end edge back cutting edge 212 is 13°-17°. Specifically, the first end edge back angle A3 can be selected as 5°, 6°, 7° or the like, preferably 6°, and the second end edge back angle A4 can be selected as 13°, 14°, 15°, 17°, preferably 15°. By setting the first end edge back angle A3 to 5°-7° and the second end edge back angle A4 to 13°-17°, the first end edge back angle 211 and the second end edge back angle 212 of the end edge 21 are made more wear-resistant during rapid cutting.
[0030] In one embodiment of this implementation, please refer to Figure 2 and Figure 4 The end edge 21 has an end edge rake face 213, and the end edge rake angle A5 corresponding to the end edge rake face 213 is 2°-4°. Specifically, the end edge rake angle A5 can be selected as 2°, 3°, 4°, etc., preferably 3°. By setting the end edge rake angle A5 to 2°-4°, the end edge rake face 213 of the end edge 21 has good strength and cutting ability, so as to be competent for high-precision cutting processing.
[0031] In one embodiment of this implementation, please refer to Figure 2 and Figure 4 The blade width of the end blade 21 (not shown) is 0.4 mm to 0.5 mm. Specifically, the blade width of the end blade 21 can be selected to be 0.4 mm, 0.45 mm, 0.5 mm, etc., preferably 0.45 mm. This arrangement can ensure that the end blade 21 has a suitable strength and has sufficient chip space to facilitate chip removal.
[0032] In one embodiment of this implementation, please refer to Figure 2 and Figure 3 , the radius R of the rounded structure 22 is 0.8mm-1.0mm. Specifically, the radius R of the rounded structure 22 can be selected to be 0.8mm, 0.9mm and 1.0mm, preferably 1.0mm. Such a configuration can make the end edge 21 and the peripheral edge 23 have good connection strength, which is conducive to improving the overall structural strength of the cutting edge 20.
[0033] In one embodiment of this implementation, please refer to Figure 2 and Figure 5 , Figure 5 yes Figure 2 A schematic cross-sectional view of a fast feed end mill 100 along the AA direction. The core diameter D of the core 10 is 4.2 mm to 5.4 mm. Specifically, the core diameter D of the core 10 can be selected to be 4.2 mm, 4.5 mm, 4.8 mm, 5.2 mm, 5.4 mm, etc., preferably 4.8 mm. This arrangement can improve the chip removal capacity while ensuring the overall structural strength.
[0034] In one embodiment of this implementation, please refer to Figure 2 The peripheral blade 23 extends in an axial spiral along the core 10, and the helix angle C is 25°-35°. Specifically, the helix angle C can be selected as 25°, 30°, 35°, etc., preferably 30°. This arrangement enables the fast feed end mill 100 to cut into the material more smoothly during the cutting process, greatly reducing the cutting resistance.
[0035] In one embodiment of this implementation, please refer to Figure 1 and Figure 2The number of the end blades 21 is multiple, and a chip groove 103 is formed between two adjacent peripheral blades 23. The bottom wall of the chip groove 103 includes a circular arc surface 1031 and a plane 1032 connected to each other. The chips formed by the peripheral blade 23 cutting the workpiece can sequentially pass through the circular arc surface 1031 and the plane 1032. In this way, the chip space of the end blade 21 is increased, so that the chips can curl and break faster, so that the chips can be discharged faster.
[0036] In this embodiment, the number of cutting edges 20 is 4 groups, and each group of cutting edges 20 includes an end edge 21, a rounded structure 22 and a peripheral edge 23. A chip groove 104 is formed between two adjacent peripheral edges 23, and the chip groove 104 is connected with the chip groove 103, so that the chips of the chip groove 104 can leave from the chip groove 103. It can be understood that the chips formed by the peripheral edge 23 can be curled by the arc surface 1031 first, and then broken by the plane 1032. The broken chips finally leave from the chip groove 104, thereby completing the chip removal action. The connection design of the arc surface 1031 and the plane 1032 can shorten the chip discharge time while ensuring the chip space, which is conducive to ensuring the reliability of the cutting process.
[0037] In this embodiment, the chip groove 103 corresponding to the long tooth and the chip groove 103 corresponding to the end tooth are connected through an arc surface, which can widen the flow channel of the cutting fluid and ensure sufficient cooling of the tool.
[0038] In one embodiment of this implementation, please refer to Figure 2 and Figure 6 , Figure 6 yes Figure 5 The enlarged structural diagram of the C area. The peripheral blade 23 has a peripheral blade rake face 231, and the peripheral blade rake angle B1 corresponding to the peripheral blade rake face 231 is 0°-0.3°. Specifically, the peripheral blade rake angle B1 can be selected as 0°, 0.2°, 0.3°, etc., preferably 0°. It can be understood that setting the peripheral blade rake angle B1 to 0°-0.3° can ensure the sharpness and durability of the cutting edge.
[0039] In one embodiment of this implementation, please refer to Figure 2 and Figure 6The peripheral blade 23 has a first peripheral blade back face 232 and a second peripheral blade back face 233. The first peripheral blade back angle B2 corresponding to the first peripheral blade back face 232 is 10°-14°, and the second peripheral blade back angle B3 corresponding to the second peripheral blade back face 233 is 24°-32°. Specifically, the first peripheral blade back angle B2 can be selected as 10°, 12°, 14°, etc., preferably 12°. The second peripheral blade back angle B3 can be selected as 24°, 26°, 28°, 32°, etc., preferably 28°. Such a setting can reduce the risk of cutting edge chipping to a greater extent, allowing the fast feed end mill 100 to maintain good cutting performance and cutting stability during long-term, high-intensity cutting operations, while also providing good chip removal performance for the cutting of the peripheral blade 23.
[0040] In one embodiment of this implementation, please refer to Figure 2 and Figure 6 The first peripheral blade flank 232 is a curved surface, and the second peripheral blade flank 233 is a straight surface. With such arrangement, the chips formed by the peripheral blade 23 can be first curled by the curved surface and then cut off by the straight surface, thereby ensuring smooth chip removal.
[0041] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.
Claims
1. A fast feed end mill, characterized in that: include: A core portion, including connected end surfaces and an outer peripheral surface; The cutting edge includes an end edge, a rounded corner structure and a peripheral edge, wherein the end edge is arranged on the end face, the peripheral edge is arranged on the outer peripheral face, the rounded corner structure connects the end edge and the peripheral edge, the front end of the end edge is relatively protruding so that the end edge has an inner butterfly angle and an outer butterfly angle, the opening of the inner butterfly angle faces the axis of the core, the opening of the outer butterfly angle faces away from the axis of the core, the inner butterfly angle is 1.6°-2.4°, the outer butterfly angle is 0.4°-0.6°, and in the axial direction of the core, the height of the front end of the end edge relative to the rounded corner structure is 0.0036mm-0.0054mm.
2. The fast feed end mill according to claim 1, characterized in that: The end edge has a first end edge clearance face and a second end edge clearance face, wherein the first end edge clearance face corresponds to a first end edge clearance angle of 5°-7°, and the second end edge clearance face corresponds to a second end edge clearance angle of 13°-17°.
3. The fast feed end mill according to claim 1, characterized in that: The blade width of the end blade is 0.4mm-0.5mm.
4. The fast feed end mill according to claim 1, characterized in that: The radius of the rounded corner structure is 0.8mm-1.0mm.
5. The fast feed end mill according to claim 1, characterized in that: The core diameter of the core is 4.2 mm-5.4 mm.
6. The fast feed end mill according to claim 1, characterized in that: The peripheral edge extends helically along the axial direction of the core, and the helix angle is 25°-35°.
7. The fast feed end mill according to claim 1, characterized in that: The peripheral blade has a peripheral blade rake surface, and the peripheral blade rake angle corresponding to the peripheral blade rake surface is 0°-0.3°.
8. The fast feed end mill according to claim 1, characterized in that: There are multiple end edges, and a chip groove is formed between two adjacent peripheral edges. The bottom wall of the chip groove includes a connected arc surface and a plane. The chips formed by the peripheral edge cutting the workpiece can pass through the arc surface and the plane in sequence.
9. The fast feed end mill according to claim 1, characterized in that: The peripheral blade has a first peripheral blade clearance surface and a second peripheral blade clearance surface. The first peripheral blade clearance surface corresponds to a first peripheral blade clearance angle of 10°-14°, and the second peripheral blade clearance surface corresponds to a second peripheral blade clearance angle of 24°-32°.
10. The fast feed end mill according to claim 9, characterized in that: The first circumferential blade flank surface is a cambered surface, and the second circumferential blade flank surface is a straight line surface.