Milling blade

Abstract

The milling cutter blade comprises a connecting section, a first end face and a second end face, the first end face and the second end face are located at the two ends of the connecting section respectively, the first end face and the second end face are both circular, and the periphery of the first end face is obliquely arranged in the direction of the second end face with the circle center of the first end face as the center. A first edge strip is formed at the joint of the first end surface and the connecting section; the surface of the first end face is in a wave shape. In the above example, the milling blade comprises a first end face and a second end face which are oppositely arranged, the first end face and the second end face are both circular, a connecting section is connected with the first end face and the second end face, and a first edge band can be formed between the periphery of the first end face and the connecting section by obliquely arranging the center of the first end face towards the direction of the second end face. And the first end face is arranged to be wavy, so that the effective inertia moment of the side face is increased, the lateral bending resistance and torsion resistance of the milling cutter blade are improved, the milling cutter is more impact-resistant, and the use performance of the milling cutter blade is improved.

Description

Technical Field

[0001] This utility model belongs to the field of machining, and in particular relates to a milling cutter. Background Technology

[0002] In the machining industry, rough milling inserts for single-sided profile milling are typically designed with a uniform cutting edge width to ensure structural strength. Inserts with a uniform cutting edge width have a longer cutting edge, resulting in stronger cutting force distribution and greater durability. However, if the entire cutting edge width of a circular milling insert is set to a uniform width, the strength of high-load areas may be insufficient (leading to chipping), while excessively thick cutting edges in low-load areas can increase friction (reducing lifespan and surface quality).

[0003] Therefore, to solve the above problems, existing technologies typically adjust the width of the cutting edge to ensure that the milling insert can balance the sharpness and strength of the cutting edge, thereby enhancing the insert's anti-chipping performance. Among these, patent CN202517098U proposes a circular milling insert, which is a cone with a central positioning through hole. The cone is evenly divided radially into 4 to 8 identical cutting units. Each cutting unit includes a bottom surface, a top surface, and a conical side surface connecting the top and bottom surfaces. The top and side surfaces intersect at an acute angle in the axial tangent to form the cutting edge. The outermost surface of the cutting edge is a cutting edge plane, which extends from the inclined rake face towards the axis. The cutting edge plane and the rake face form a rake angle γ in the axial tangent. The width of the cutting edge plane varies between 0.05 mm and 0.4 mm with the circumferential angle, and the rake angle γ varies between 10° and 30° with the circumferential angle. Therefore, by varying the cutting edge width and rake angle according to the depth of cut, the sharpness and strength of the cutting edge can be balanced, enhancing the chipping resistance of the insert, increasing the insert life, ensuring the quality of the machined surface, and enabling the insert to adapt to changes in chip breaking range, feed rate, and depth of cut.

[0004] However, the aforementioned patents neglected the dynamic load differences at different circumferential positions (such as entry / exit points and lowest points) during the cutting process. This resulted in localized strength redundancy or insufficiency in the uniformly distributed cutting units. High-load areas were prone to chipping, while low-load areas suffered increased friction and wear due to excessively thick cutting edges. The existing technology still suffers from poor cutting performance. Utility Model Content

[0005] This invention provides a milling insert that improves the cutting performance of the milling insert.

[0006] According to a first aspect of the present invention, a milling cutter is provided, which may include:

[0007] The connecting segment and the first end face and the second end face located at both ends of the connecting segment are circular. The outer periphery of the first end face is inclined towards the second end face with the center of the first end face as the center, so that the connection between the first end face and the connecting segment forms a first cutting edge.

[0008] The surface of the first end face is wavy.

[0009] Optionally, the milling cutter is provided with multiple positioning parts, and the connecting part of the cutter head is connected to each positioning part, with the multiple positioning parts arranged around the connecting part;

[0010] The blade width of the first cutting edge corresponding to the first center line is the minimum blade width of the first cutting edge, and the blade width of the first cutting edge corresponding to the second center line is the maximum blade width of the first cutting edge. The first center line is the center line of the positioning part, and the second center line is the center line of the distance between two adjacent positioning parts.

[0011] Optionally, the positioning part is a clamping surface, which is disposed on the outer periphery of the connecting section and located at the end of the milling cutter away from the first end face. The area of ​​the first end face is greater than the area of ​​the second end face. The cutting width of the first cutting strip corresponding to the first center line of the clamping surface is the minimum cutting width of the first cutting strip, and the cutting width of the first cutting strip corresponding to the distance between the two clamping surfaces is the maximum cutting width of the first cutting strip.

[0012] Optionally, multiple clamping surfaces are sequentially connected to each other to form a connecting line, and the cutting width of the first cutting edge corresponding to the connecting line is the maximum value of the cutting width of the first cutting edge.

[0013] Optionally, the positioning part is a positioning post, which is disposed on the first end face. The cutting width of the first cutting strip corresponding to the first center line of the positioning post is the minimum cutting width of the first cutting strip, and the cutting width of the first cutting strip corresponding to the second center line of the distance between two adjacent positioning posts is the maximum cutting width of the first cutting strip.

[0014] Optionally, the positioning post is disposed on the second end face, and the positioning post disposed on the first end face and the positioning post disposed on the second end face are coaxially disposed.

[0015] Optionally, a second cutting edge is formed at the connection between the second end face and the connecting section, the cutting edge width of the second cutting edge corresponding to the first center line is the minimum cutting edge width of the second cutting edge, and the cutting edge width of the second cutting edge corresponding to the second center line is the maximum cutting edge width of the second cutting edge.

[0016] Optionally, the minimum blade width of the first blade strip is equal to the minimum blade width of the second blade strip, and the maximum blade width of the first blade strip is equal to the maximum blade width of the second blade strip.

[0017] Optionally, the first cutting edge corresponding to the first center line of the positioning part and the first cutting edge corresponding to the second center line between two adjacent positioning parts are smoothly connected.

[0018] Optionally, a through hole is provided on the first end face, which extends through the connecting section to the second end face, and the connecting part of the cutter head passes through the through hole and connects with each positioning part.

[0019] The technical solutions provided by the embodiments of this utility model bring at least the following beneficial effects:

[0020] This utility model embodiment provides a milling cutter, which includes a connecting section and a first end face and a second end face located at both ends of the connecting section. Both the first and second end faces are circular. The outer periphery of the first end face is inclined towards the second end face with the center of the first end face as its center, so that a first cutting edge is formed at the connection between the first end face and the connecting section. The surface of the first end face is wavy. In the above example, the milling cutter includes a first end face and a second end face arranged opposite each other, both of which are circular. The connecting section connects the first and second end faces. By inclining the center of the first end face towards the second end face, a first cutting edge can be formed between the outer periphery of the first end face and the connecting section. Furthermore, the first end face is wavy. Since the geometry of the wavy surface is essentially a "bending reinforcement," similar to the compression resistance principle of corrugated cardboard, the undulations of the corrugations increase the effective moment of inertia (bending section modulus) of the sides, thereby improving the lateral bending and torsional resistance of the milling cutter, making the milling cutter more impact-resistant, and thus improving the performance of the milling cutter.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention, but do not constitute an undue limitation of the present invention.

[0023] Figure 1 This is a schematic diagram of a milling cutter according to an exemplary embodiment;

[0024] Figure 2 This is another structural schematic diagram of a milling cutter according to an exemplary embodiment;

[0025] Figure 3 This is yet another structural schematic diagram of a milling cutter according to an exemplary embodiment.

[0026] Legend:

[0027] Detailed Implementation

[0028] 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. Furthermore, 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.

[0029] 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.

[0030] In this invention, 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," etc., 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 invention.

[0031] In this specification, the illustrative expressions of the terms used above do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Numerous specific details are set forth in the following description to provide a thorough understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in this specification are only a part of the embodiments of this disclosure, and not all of them.

[0032] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0033] Based on this, the present invention provides a milling insert. The milling insert provided in the embodiments of the present invention will be described below first.

[0034] like Figure 1-3 Show;

[0035] Example 1;

[0036] Milling cutter 1 may include:

[0037] The connecting segment 30 and the first end face 10 and the second end face 20 located at both ends of the connecting segment 30 are circular. The outer periphery of the first end face 10 is inclined towards the second end face 20 with the center of the first end face 10 as the center, so that the connection between the first end face 10 and the connecting segment 30 forms a first cutting edge 11.

[0038] The surface of the first end face 10 is wavy.

[0039] In the above example, the milling cutter includes a first end face 10 and a second end face 20 arranged opposite to each other. Both the first end face 10 and the second end face 20 are circular. A connecting section 30 connects the first end face 10 and the second end face 20. By tilting the center of the first end face 10 towards the second end face 20, a first cutting edge 11 can be formed between the outer periphery of the first end face 10 and the connecting section 30. Furthermore, the first end face 10 is wavy. Since the geometry of the wavy surface is essentially a "bending reinforcement," similar to the compression resistance principle of corrugated cardboard, the undulations of the corrugations increase the effective moment of inertia (bending section modulus) of the sides, thereby improving the lateral bending and torsional resistance of the milling cutter 1, making the milling cutter more impact-resistant, and thus improving the performance of the milling cutter 1.

[0040] Optionally, in one example, the milling cutter is provided with a plurality of positioning portions 40, and the connecting portion of the cutter head is connected to each positioning portion 40, with the plurality of positioning portions 40 arranged around the connecting portion;

[0041] The blade width of the first cutting edge 11 corresponding to the first center line is the minimum blade width of the first cutting edge 11, and the blade width of the first cutting edge 11 corresponding to the second center line is the maximum blade width of the first cutting edge 11. The first center line is the center line of the positioning part 40, and the second center line is the center line of the distance between two adjacent positioning parts 40.

[0042] In the above example, multiple positioning parts 40 are provided on the milling cutter 1. The connecting part of the milling cutter head is connected to the positioning parts 40 of the milling cutter 1, so that the cutter head and the milling cutter 1 are positioned. The first end face 10 and the second end face 20 of the milling cutter 1 are both circular. In order to improve the positioning accuracy of the positioning parts 40 and the cutter head, the positioning parts 40 can be arranged around the connecting part of the cutter head. Specifically, the positioning parts 40 can be arranged on any structure such as the first end face 10, the second end face 20, or the milling cutter. The centerline of the positioning parts 40 is the first centerline, and the centerline of the distance between two adjacent positioning parts 40 is the second centerline. The cutting width at the intersection of the first centerline and the first cutting edge 11 is set to the minimum cutting width of the entire first cutting edge 11, and the cutting width at the intersection of the second centerline and the first cutting edge 11 is set to the maximum cutting width of the entire first cutting edge 11.

[0043] In this example, the milling insert 1 is positioned and connected to the cutter head via the positioning part 40. When the milling insert 1 is machining the workpiece, the first cutting edge 11 corresponding to the positioning part 40 is the lowest point during cutting, and the cutting edge trajectory of the circular milling insert 1 is an arc. When the milling insert 1 rotates to the lowest point, the angle between the instantaneous movement direction of the first cutting edge 11 and the workpiece surface approaches zero (tangential contact). At this time, the cutting thickness (the theoretical thickness of the chip) of the milling insert 1 reaches its minimum value, or even approaches zero. This is because at the lowest point, the cutting direction of the cutting edge is almost parallel to the workpiece surface, causing the chip to be "scraped" rather than effectively sheared. Therefore, the cutting width of the first cutting edge 11 corresponding to the first center line of the positioning part 40 is set to the minimum value of the entire first cutting edge 11, while the cutting width of the first cutting edge 11 of the adjacent positioning part 40 is set to the maximum value of the entire first cutting edge 11. This allows the circular milling cutter 1 to be better suited for the rotational machining of the milling cutter 1 during the machining process. By changing the width design of the first cutting edge 11, the first cutting edge 11 becomes stronger in the high-stress area and sharper in the low-stress area, thereby further improving the machining performance of the milling cutter 1.

[0044] Optionally, in one example, the positioning part 40 is a clamping surface 41, which is disposed on the outer periphery of the connecting section 30 and located at the end of the milling cutter away from the first end face 10. The area of ​​the first end face 10 is greater than the area of ​​the second end face 20. The cutting width of the first cutting edge 11 corresponding to the first center line of the clamping surface 41 is the minimum cutting width of the first cutting edge 11, and the cutting width of the first cutting edge 11 corresponding to the distance between the two clamping surfaces 41 is the maximum cutting width of the first cutting edge 11.

[0045] In the above example, the area of ​​the first end face 10 is larger than the area of ​​the second end face 20, making the connecting section 30 a frustum shape. The positioning part 40 is located at the end away from the first end face 10, which is the small end of the frustum-shaped connecting section 30. Thus, the positioning part 40 can be a clamping surface 41, and multiple clamping surfaces 41 are arranged in a ring around the outer periphery of the connecting section 30, thereby increasing the contact area between the cutter head and the milling cutter 1 and improving the installation effect of the milling cutter 1 and the cutter head.

[0046] When the positioning part 40 is a clamping surface 41, the blade width of the first cutting edge 11 corresponding to the first center line of the clamping surface 41 is the minimum value of the blade width of the entire first cutting edge 11, and the blade width of the first cutting edge 11 corresponding to the distance between the two clamping surfaces 41 is the maximum value of the blade width of the entire first cutting edge 11.

[0047] Optionally, in one example, multiple clamping surfaces 41 are sequentially connected to each other to form a connecting line, and the blade width of the first cutting edge 11 corresponding to the connecting line is the maximum blade width of the first cutting edge 11.

[0048] In the above example, by connecting multiple clamping surfaces 41 to each other in sequence, the area of ​​the clamping surfaces 41 is further expanded, and the contact area between the cutter head and the milling cutter 1 is further increased, thereby improving the installation effect of the milling cutter 1 and the cutter head.

[0049] Optionally, in one example, the positioning part 40 is a positioning post 42, which is disposed on the first end face 10. The blade width of the first cutting edge 11 corresponding to the first center line of the positioning post 42 is the minimum blade width of the first cutting edge 11, and the blade width of the first cutting edge 11 corresponding to the second center line of the distance between two adjacent positioning posts 42 is the maximum blade width of the first cutting edge 11.

[0050] In the above example, the positioning part 40 is set as a positioning post 42. The positioning post 42 is engaged with the positioning hole on the cutter head, which can improve the installation stability of the milling cutter 1 and the cutter head, thereby improving the installation effect of the milling cutter 1 and the cutter head.

[0051] Therefore, the cutting width of the first cutting edge 11 corresponding to the first center line of the positioning post 42 is the minimum value of the cutting width of the entire cutting edge; while the cutting width of the first cutting edge 11 corresponding to the second center line of the distance between two adjacent positioning posts 42 is the maximum value of the cutting width of the entire cutting edge.

[0052] Optionally, in one example, the positioning post 42 is disposed on the second end face 20, and the positioning post 42 disposed on the first end face 10 and the positioning post 42 disposed on the second end face 20 are coaxially disposed.

[0053] In the above example, a positioning post 42 is further provided on the second end face 20, and the positioning post 42 on the first end face 10 and the positioning post 42 on the second end face 20 are coaxially arranged with each other, so that the positioning post 42 is provided on both the first end face 10 and the second end face 20 of the milling cutter 1, thereby improving the installation stability of the milling cutter 1 and the cutter head, and thus improving the installation effect of the milling cutter 1 and the cutter head.

[0054] Example 2:

[0055] Optionally, in one example, a second cutting edge 21 is formed at the connection between the second end face 20 and the connecting segment 30, the cutting edge width of the second cutting edge 21 corresponding to the first center line is the minimum cutting edge width of the second cutting edge 21, and the cutting edge width of the second cutting edge 21 corresponding to the second center line is the maximum cutting edge width of the second cutting edge 21.

[0056] In the above example, by forming a second cutting edge 21 at the connection between the second end face 20 and the connecting section 30, the milling cutter 1 is formed on both the first end face 10 and the second end face 20, which are capable of cutting the workpiece, thereby improving the cutting effect of the milling cutter 1.

[0057] Optionally, in one example, the minimum blade width of the first blade 11 and the minimum blade width of the second blade 21 are equal, and the maximum blade width of the first blade 11 and the maximum blade width of the second blade 21 are equal.

[0058] In the above example, by setting the minimum and maximum cutting widths of the first cutting edge 11 and the second cutting edge 21 to be equal, the changing trends of the first cutting edge 11 and the second cutting edge 21 are also the same, and the first cutting edge 11 and the second cutting edge 21 are symmetrically arranged, thereby enabling both the first end face 10 and the second end face 20 of the milling cutter 1 to perform workpiece machining, thus improving the machining flexibility and applicability of the milling cutter 1.

[0059] In Example 2, all the processes of Example 1 above can be implemented and the same technical effects can be achieved. To avoid repetition, they will not be described again here.

[0060] Example 3:

[0061] Optionally, in one example, the first cutting edge 11 corresponding to the first center line of the positioning part 40 and the first cutting edge 11 corresponding to the second center line between two adjacent positioning parts 40 are smoothly connected.

[0062] In the above example, by smoothly connecting the first cutting edge 11 and the second cutting edge 21, and by arranging the multiple positioning parts 40 evenly along the circumference of the milling cutter 1, it is ensured that the cutting edge transition area corresponding to each positioning part 40 is subjected to balanced force. The smooth transition avoids the fluctuation of cutting force caused by geometric abrupt changes. The gradual structure can disperse the impact energy and avoid chipping caused by local overload.

[0063] Optionally, in one example, the first end face 10 is provided with a through hole 12, which extends through the connecting section 30 to the second end face 20, and the connecting part of the cutter head passes through the through hole 12 and connects with each positioning part 40.

[0064] In the above example, by opening a through hole 12 on the first end face 10 and making the through hole 12 penetrate the connecting section 30 to the second end face 20, the connecting part of the cutter head can pass through the through hole 12 and be fixed to the connecting section 30, and be positioned and connected by the positioning part 40, thereby further improving the connection stability of the cutter head and the milling cutter 1.

[0065] In Example 3, the various processes of Example 1 and / or Example 2 described above can be implemented and the same technical effects can be achieved. To avoid repetition, they will not be described again here.

[0066] The above description is merely a specific embodiment of this utility model. Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model.

Claims

1. A milling insert, characterized by The milling blade comprises: a connecting section and a first end face and a second end face respectively located at two ends of the connecting section, the first end face and the second end face are circular, the outer periphery of the first end face is inclinedly arranged towards the second end face with the center of the first end face as the center, so that the connecting part of the first end face and the connecting section forms a first blade belt; the surface of the first end face is arranged in a wave shape.

2. The milling insert according to claim 1, wherein The milling blade is provided with a plurality of positioning portions, the connecting portion of the cutter head is connected with each of the positioning portions, and the plurality of positioning portions are arranged around the connecting portion; The blade width of the first blade belt corresponding to the first median line is the minimum value of the blade width of the first blade belt, and the blade width of the first blade belt corresponding to the second median line is the maximum value of the blade width of the first blade belt, the first median line is the median line of the positioning portion, and the second median line is the median line of the spacing between the adjacent two positioning portions.

3. The milling insert according to claim 2, wherein The positioning portion is a clamping surface, the clamping surface is arranged on the outer periphery of the connecting section, and the clamping surface is located at one end of the milling blade away from the first end face, the area of the first end face is greater than the area of the second end face, the blade width of the first blade belt corresponding to the first median line of the clamping surface is the minimum value of the blade width of the first blade belt, and the blade width of the first blade belt corresponding to the spacing between the two clamping surfaces is the maximum value of the blade width of the first blade belt.

4. The milling insert according to claim 3, wherein The plurality of clamping surfaces are sequentially connected to form a connecting line, and the blade width of the first blade belt corresponding to the connecting line is the maximum value of the blade width of the first blade belt.

5. The milling insert according to claim 2, wherein The positioning portion is a positioning column, the positioning column is arranged on the first end face, the blade width of the first blade belt corresponding to the first median line of the positioning column is the minimum value of the blade width of the first blade belt, and the blade width of the first blade belt corresponding to the second median line of the spacing between the adjacent two positioning columns is the maximum value of the blade width of the first blade belt.

6. The milling insert according to claim 5, wherein The positioning column is arranged on the second end face, and the positioning column arranged on the first end face and the positioning column arranged on the second end face are coaxially arranged.

7. The milling insert according to any one of claims 2-6, wherein, The connecting part of the second end face and the connecting section forms a second blade belt, the blade width of the second blade belt corresponding to the first median line is the minimum value of the blade width of the second blade belt, and the blade width of the second blade belt corresponding to the second median line is the maximum value of the blade width of the second blade belt.

8. The milling insert according to claim 7, wherein The minimum value of the blade width of the first blade belt and the minimum value of the blade width of the second blade belt are equal, and the maximum value of the blade width of the first blade belt and the maximum value of the blade width of the second blade belt are equal.

9. The milling insert according to any one of claims 2-6, wherein, The first blade belt corresponding to the first median line of the positioning portion and the first blade belt corresponding to the second median line between the adjacent two positioning portions are smoothly connected.

10. The milling insert according to any one of claims 2-6, wherein, The first end face is provided with a through hole, the through hole penetrates through the connecting section to the second end face, and the connecting portion of the cutter head is connected with each of the positioning portions through the through hole.

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