Anti-rotation square shoulder milling cutter blade and cutter head

Abstract

The anti-rotation square shoulder milling blade comprises a blade body, the blade body comprises a main cutting edge, an auxiliary cutting edge, a sleeking edge and an anti-rotation groove, and a screw hole is formed in the geometric center of the blade body; the adjacent main cutting edges are in transition connection through a tool nose fillet, an auxiliary cutting edge and a sleeking edge in sequence; the anti-rotation groove is formed in the opposite side of the main cutting edge; the sleeking edge and the auxiliary cutting edge are located on the same side. The main cutting edge is formed by intersecting a main cutting edge front tool face and a main cutting edge rear tool face, and the main cutting edge front tool face inclines along the interior of the blade body. The auxiliary cutting edge is formed by intersecting an auxiliary cutting edge front tool face and an auxiliary cutting edge rear tool face; the sleeking edge is formed by intersecting a sleeking edge front tool face and a sleeking edge rear tool face. The milling blade provided by the utility model is more stable in fixation, more stable in blade positioning and higher in economical efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of milling cutter research and manufacturing technology, and in particular, relates to an anti-rotation square shoulder milling cutter insert and cutter head. Background Technology

[0002] Square shoulder milling cutters hold a significant position in modern milling processes, widely used for face, edge, and grooving of products. As a type of milling cutter with 90° inserts, square shoulder milling cutters are frequently used in CNC machining. Their advantages, including economy, flexibility, and reliability, make them a preferred choice for many milling operations. Their advantages are particularly evident in machining processes requiring truly 90° straight sidewalls. Square shoulder milling allows for a universal machining solution across various applications, greatly improving machining efficiency and flexibility. However, for aluminum square shoulder milling inserts used in the machining industry, the common fastening methods are single-hole screw fastening and double-hole screw fastening.

[0003] Single-hole screw fastening cannot provide sufficient stability, especially during high-speed cutting or under large cutting forces. The milling insert is prone to loosening or shifting, affecting machining accuracy and surface quality. Because there is only one fastening point, the milling insert will experience uneven stress distribution under load, which may lead to uneven wear and shorten its service life over time. Compared to single-hole screw fastening, double-hole screw fastening requires more installation steps and time, increasing operational complexity and potentially causing a decrease in insert strength. Double-hole screw fastening also requires more screws and fasteners, increasing material costs.

[0004] Existing patent publication number KR102115293B1 discloses a cutting insert comprising an upper surface, a lower surface, a side surface, a cutting edge, and a fastening hole, wherein the cutting insert is a positive type with 180-degree rotational symmetry. The cutting marks include a main cutting edge, a secondary cutting edge, and a bevel cutting edge. The side surface includes the main cutting edge, which is connected to the main cutting edge. The secondary cutting edge is connected to the sub-cutting edge. The diagonal includes a secondary side surface with a diagonal cutting edge allowance surface connected to the cutting edge. At both ends of the lower surface, a fastening groove is formed in a stepped manner on the secondary side surface along the direction of the diagonal cutting edge allowance surface. Within the fastening groove, the cutting tool contacts the fastening surface in an inverted shape. This patent fixes the insert body through the fastening groove on the side surface and the central fastening hole of the insert, which easily leads to instability in the axial direction of the insert and a decrease in the strength of the insert. Utility Model Content

[0005] This invention addresses the shortcomings of existing square shoulder end mills secured with single-hole screws, which fail to provide sufficient stability, especially during high-speed cutting or under high cutting forces. These end mills are prone to loosening or shifting, affecting machining accuracy and surface quality. While double-hole screw securing requires more installation steps and time, increasing operational complexity and potentially leading to reduced insert strength, it also necessitates the use of more screws and fasteners, increasing material costs. This invention provides an anti-rotation square shoulder end mill insert and cutter head.

[0006] An anti-rotation square shoulder milling insert includes an insert body, which includes a main cutting edge, a secondary cutting edge, a finishing edge, and an anti-rotation groove. A screw hole is provided at the geometric center of the insert body. Adjacent main cutting edges are connected sequentially by a tool tip fillet, a secondary cutting edge, and a finishing edge. The anti-rotation groove is located on the opposite side of the main cutting edge. The finishing edge and the secondary cutting edge are located on the same side.

[0007] The main cutting edge is formed by the intersection of the main cutting edge rake face and the main cutting edge flank face, and the main cutting edge rake face is inclined along the inside of the insert body; the secondary cutting edge is formed by the intersection of the secondary cutting edge rake face and the secondary cutting edge flank face; the finishing edge is formed by the intersection of the finishing edge rake face and the finishing edge flank face.

[0008] Furthermore, the main cutting edge flank face includes a first flank face and a second flank face.

[0009] Furthermore, the first flank face of the main cutting edge is connected to the second flank face of the main cutting edge, and the second flank face of the main cutting edge is used for radial positioning of the insert body.

[0010] Furthermore, the main cutting edge, the secondary cutting edge, the finishing edge, and the anti-rotation groove are all centrally symmetrical about the screw hole.

[0011] Furthermore, the main cutting edge flank face and the secondary cutting edge flank face are connected by a circular arc surface transition.

[0012] Furthermore, the secondary cutting edge flank is used for axial positioning of the insert body.

[0013] Furthermore, there are two anti-rotation grooves, and the angle between the anti-rotation grooves and the horizontal line is 15°.

[0014] Furthermore, the distance between the center lines of the two anti-rotation grooves is 9.73 mm.

[0015] Furthermore, the width of the anti-rotation groove is 2mm.

[0016] A cutter head, used in conjunction with the anti-rotation square shoulder milling insert as described above, wherein the cutter head is provided with an anti-rotation groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This utility model includes a insert body, which comprises a main cutting edge, a secondary cutting edge, a finishing edge, and an anti-rotation groove. A screw hole is provided at the geometric center of the insert body. Adjacent main cutting edges are sequentially connected by a tool tip fillet, a secondary cutting edge, and a finishing edge. The anti-rotation groove is located on the opposite side of the main cutting edge. The finishing edge and the secondary cutting edge are located on the same side. The main cutting edge is formed by the intersection of the main cutting edge rake face and the main cutting edge flank face, with the rake face inclined along the inside of the insert body. The secondary cutting edge is formed by the intersection of the secondary cutting edge rake face and the secondary cutting edge flank face. The finishing edge is formed by the intersection of the finishing edge rake face and the finishing edge flank face. By providing a screw hole and two anti-rotation grooves on the insert body, and using it in conjunction with a cutter head with an anti-rotation protrusion, a square shoulder end mill insert is fixed. This fixing method makes the square shoulder end mill insert more secure, more economical, and the positioning of the square shoulder end mill insert more stable. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of an anti-rotation square shoulder milling cutter;

[0020] Figure 2 A top view of an anti-rotation square shoulder milling insert;

[0021] Figure 3 A bottom view of an anti-rotation square shoulder milling insert;

[0022] Figure 4 This is a schematic diagram of the cutter head structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure and assembly of an anti-rotation square shoulder milling cutter and cutter head.

[0024] In the above figure, 1. Insert body; 2. Main cutting edge; 3. Secondary cutting edge; 4. Finishing edge; 5. Anti-rotation groove; 6. Tool tip radius; 7. Main cutting edge rake face; 8. Main cutting edge first flank face; 9. Main cutting edge second flank face; 10. Secondary cutting edge rake face; 11. Secondary cutting edge flank face; 12. Finishing edge rake face; 13. Finishing edge flank face; 14. Screw hole; 15. Tool disc; 16. Anti-rotation groove. Detailed Implementation

[0025] To clearly illustrate the technical features of this utility model, the present utility model will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0027] Furthermore, in the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] Example 1

[0031] like Figure 1As shown, an anti-rotation square shoulder milling insert and cutter head include an insert body 1, which includes a main cutting edge 2, a secondary cutting edge 3, a finishing edge 4, and an anti-rotation groove 5. A screw hole 14 is provided at the geometric center of the insert body 1. Adjacent main cutting edges 2 are sequentially connected by a tip fillet 6, a secondary cutting edge 3, and a finishing edge 4. The anti-rotation groove 5 is located on the opposite side of the main cutting edge 2. The finishing edge 4 and the secondary cutting edge 3 are located on the same side. The cutter head 15 has an anti-rotation protrusion 16 that cooperates with the anti-rotation groove 5 to securely fix the insert.

[0032] The main cutting edge 2 is formed by the intersection of the main cutting edge rake face 7 and the main cutting edge flank face, and the main cutting edge rake face 7 is inclined along the inside of the insert body 1; the secondary cutting edge 3 is formed by the intersection of the secondary cutting edge rake face 10 and the secondary cutting edge flank face 11; the finishing edge 4 is formed by the intersection of the finishing edge rake face 12 and the finishing edge flank face 13.

[0033] In this embodiment, as Figure 1 and Figure 2 As shown, the main cutting edge flank face includes a first flank face 8 and a second flank face 9, which are connected. The second flank face 9 is in contact with the plane containing the anti-rotation groove 5, and the angle between the second flank face 9 and the plane containing the anti-rotation groove 5 is an obtuse angle. The secondary cutting edge flank face 11 is connected to the main cutting edge flank face via a circular arc transition, and the secondary cutting edge flank face 11 is connected to the finishing edge flank face 13. The main cutting edge rake face 7, the secondary cutting edge rake face 10, and the finishing edge rake face 12 are connected sequentially, and all these faces are inclined inwards towards the insert body 1.

[0034] like Figure 1 and Figure 3 As shown, the main cutting edge 2, the secondary cutting edge 3, the finishing edge 4, and the anti-rotation groove 5 are all centrally symmetrical about the screw hole 14, ensuring the balance and cutting performance of the insert. Identification markings are also provided on the insert body 1.

[0035] like Figure 5 As shown, when the square shoulder milling insert is fixed on the cutter head 15, the main cutting second flank face 9 serves as the radial positioning surface for radial positioning; while the secondary cutting edge flank face 11 serves as the axial positioning surface for axial positioning, making the insert positioning more stable.

[0036] Example 2

[0037] like Figure 1As shown, an anti-rotation square shoulder milling insert and cutter head include an insert body 1, which includes a main cutting edge 2, a secondary cutting edge 3, a finishing edge 4, and an anti-rotation groove 5. A screw hole 14 is provided at the geometric center of the insert body 1. Adjacent main cutting edges 2 are sequentially connected by a tip fillet 6, a secondary cutting edge 3, and a finishing edge 4. The anti-rotation groove 5 is located on the opposite side of the main cutting edge 2. The finishing edge 4 and the secondary cutting edge 3 are located on the same side. The cutter head 15 has an anti-rotation protrusion 16 that cooperates with the anti-rotation groove 5 to securely fix the insert.

[0038] The main cutting edge 2 is formed by the intersection of the main cutting edge rake face 7 and the main cutting edge flank face, and the main cutting edge rake face 7 is inclined along the inside of the insert body 1; the secondary cutting edge 3 is formed by the intersection of the secondary cutting edge rake face 10 and the secondary cutting edge flank face 11; the finishing edge 4 is formed by the intersection of the finishing edge rake face 12 and the finishing edge flank face 13.

[0039] In this embodiment, as Figure 1 and Figure 3 As shown, there are two anti-rotation grooves 5. The plane containing the anti-rotation groove 5 serves as the bottom mounting surface, which fits tightly against the cutter head 15, making the blade installation more stable. The anti-rotation groove 5 is a long, narrow groove structure with a short side width of 2mm. The distance between the center lines of the two anti-rotation grooves 5 is 9.73mm. The angle between the center line of the anti-rotation groove 5 and the horizontal line is 15°. These parameters ensure the effectiveness and stability of the anti-rotation groove 5.

[0040] Example 3

[0041] like Figure 1 As shown, an anti-rotation square shoulder milling insert and cutter head include an insert body 1, which includes a main cutting edge 2, a secondary cutting edge 3, a finishing edge 4, and an anti-rotation groove 5. A screw hole 14 is provided at the geometric center of the insert body 1. Adjacent main cutting edges 2 are sequentially connected by a tip fillet 6, a secondary cutting edge 3, and a finishing edge 4. The anti-rotation groove 5 is located on the opposite side of the main cutting edge 2. The finishing edge 4 and the secondary cutting edge 3 are located on the same side. The cutter head 15 has an anti-rotation protrusion 16 that cooperates with the anti-rotation groove 5 to securely fix the insert.

[0042] The main cutting edge 2 is formed by the intersection of the main cutting edge rake face 7 and the main cutting edge flank face, and the main cutting edge rake face 7 is inclined along the inside of the insert body 1; the secondary cutting edge 3 is formed by the intersection of the secondary cutting edge rake face 10 and the secondary cutting edge flank face 11; the finishing edge 4 is formed by the intersection of the finishing edge rake face 12 and the finishing edge flank face 13.

[0043] In this embodiment, as Figure 4 and Figure 5As shown, the cutter head 15 is provided with two anti-rotation protrusions 16 that cooperate with the anti-rotation groove 5. The anti-rotation protrusions 16 are cuboid structures, which facilitates the anti-rotation protrusions 16 to be inserted into the anti-rotation groove 5, so as to achieve a stable connection between the blade and the cutter head 15.

[0044] The anti-rotation groove 5 in this embodiment is more complex in design and adopts a wave-shaped structure to increase the contact area and friction between the anti-rotation groove 5 and the cutter head 15 and the anti-rotation protrusion 16, thereby further improving the connection stability between the blade and the cutter head 15.

[0045] Obviously, the above-described embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A square shoulder milling insert with anti-rotation feature, comprising an insert body, characterized in that, The blade body includes a main cutting edge, a secondary cutting edge, a finishing edge, and an anti-rotation groove. A screw hole is provided at the geometric center of the blade body. Adjacent main cutting edges are connected sequentially by a blade tip fillet, a secondary cutting edge, and a finishing edge. The anti-rotation groove is located on the opposite side of the main cutting edge. The finishing edge and the secondary cutting edge are located on the same side. The main cutting edge is formed by the intersection of the main cutting edge rake face and the main cutting edge flank face, and the main cutting edge rake face is inclined along the inside of the insert body; the secondary cutting edge is formed by the intersection of the secondary cutting edge rake face and the secondary cutting edge flank face; the finishing edge is formed by the intersection of the finishing edge rake face and the finishing edge flank face.

2. The anti-rotation square shoulder milling cutter according to claim 1, characterized in that, The main cutting edge flank face includes a first flank face and a second flank face.

3. The anti-rotation square shoulder milling cutter according to claim 2, characterized in that, The first flank face of the main cutting edge is connected to the second flank face of the main cutting edge, and the second flank face of the main cutting edge is used for radial positioning of the insert body.

4. The anti-rotation square shoulder milling cutter according to claim 1, characterized in that, The main cutting edge, secondary cutting edge, finishing edge, and anti-rotation groove are all centrally symmetrical about the screw hole.

5. A square shoulder milling cutter according to claim 1, characterized in that, The main cutting edge flank and the secondary cutting edge flank are connected by a circular arc surface transition.

6. The anti-rotation square shoulder milling cutter according to claim 5, characterized in that, The secondary cutting edge flank is used for axial positioning of the insert body.

7. The anti-rotation square shoulder milling cutter according to claim 1, characterized in that, The number of anti-rotation grooves is two, and the angle between the anti-rotation grooves and the horizontal line is 15°.

8. A square shoulder milling cutter according to claim 7, characterized in that, The distance between the center lines of the two anti-rotation grooves is 9.73 mm.

9. A square shoulder milling cutter according to claim 7, characterized in that, The width of the anti-rotation groove is 2mm.

10. A cutter head, characterized in that, When used in conjunction with the anti-rotation square shoulder milling insert as described in any one of claims 1 to 9, the cutter head is provided with an anti-rotation groove.

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