A type of milling cutter
By using staggered peripheral cutting edges and a specific angle cutting edge design on the milling cutter head, the accuracy and efficiency problems caused by the radial dimension difference of the milling cutter are solved, achieving high-precision and high-efficiency machining results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN FULLANTI TOOLS CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-06-30
AI Technical Summary
Existing milling cutters have significant differences in the dimensions of the cutting section in the radial direction of the cutter head, resulting in reduced machining accuracy and efficiency.
Design a milling cutter with multiple first and second circumferential cutting edges staggered on the cutter head. The first and second cutting parts are distributed along the axial direction of the cutter head. The second and third circumferential cutting edges are staggered in the circumferential direction of the cutter head, and the cutting circle radius is less than 0.05mm. Combined with a specific rake angle and clearance angle design.
It improves machining accuracy and efficiency, extends the service life of milling cutters, and enhances impact resistance and cutting performance.
Smart Images
Figure CN224424357U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of milling cutter technology, and in particular to a milling cutter. Background Technology
[0002] In milling, multiple groove-like structures need to be milled into the side of the workpiece. In related milling cutters, multiple sets of cutting sections are arranged on the circumferential surface of the cutter head. These sets of cutting sections are distributed along the axial direction of the cutter head, and the individual cutting sections within the same set are spaced apart circumferentially around the axis of the cutter head. Furthermore, a cutting section from the same set is located between any two adjacent chip evacuation grooves. However, when the dimensional differences between the cutting sections of different sets of cutting sections in the radial direction of the cutter head are significant, the cutting performance of the milling cutter during milling will decrease accordingly, thus affecting the machining accuracy of the workpiece. Utility Model Content
[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 proposes a milling cutter with higher machining accuracy.
[0004] A milling cutter according to an embodiment of the present invention includes a shank and a cutter head. The shank is used for clamping the milling cutter. The cutter head is disposed at one end of the shank and has a plurality of first circumferential cutting edges. The plurality of first circumferential cutting edges are circumferentially spaced around the axis of the cutter head. The plurality of first circumferential cutting edges include a plurality of first sub-circumferential cutting edges and a plurality of second sub-circumferential cutting edges. The first sub-circumferential cutting edges and the second sub-circumferential cutting edges are alternately distributed circumferentially around the axis of the cutter head. A first cutting portion is provided on the flank face of the first sub-circumferential cutting edge. The first cutting portion has a second circumferential cutting edge. A second cutting portion is provided on the flank face of the second sub-circumferential cutting edge. The second cutting portion has a third circumferential cutting edge. The second cutting portion and the first cutting portion are distributed along the axial direction of the cutter head.
[0005] A milling cutter according to an embodiment of the present utility model has at least the following technical effects:
[0006] In a milling cutter of this application, a second circumferential cutting edge is disposed on the flank face of the first cutting portion of a first sub-circumferential cutting edge, and a third circumferential cutting edge is disposed on the flank face of the first cutting portion of a second sub-circumferential cutting edge. The first and second cutting portions are distributed along the axial direction of the cutter head, such that the second and third circumferential cutting edges are staggered in both the circumferential and axial directions of the cutter head. It is understood that, because the second and third circumferential cutting edges are staggered in the circumferential direction of the cutter head, even with a large dimensional difference between the first and second cutting portions in the radial direction of the cutter head (assuming both the radii of the second and third cutting edges are less than 0.05 mm), the milling cutter of this application still possesses high machining accuracy when machining workpieces.
[0007] According to some embodiments of the present invention, a milling cutter has a first circumferential cutting edge having a first circumferential cutting edge rake angle, a first circumferential cutting edge clearance angle and a first circumferential cutting edge second clearance angle. The angle of the first circumferential cutting edge rake angle is between -22 degrees and -28 degrees, the angle of the first circumferential cutting edge clearance angle is between 12 degrees and 15 degrees, and the angle of the first circumferential cutting edge second clearance angle is between 25 degrees and 30 degrees.
[0008] According to some embodiments of the present invention, a milling cutter has a second circumferential cutting edge having a second circumferential cutting edge first rake angle and a second circumferential cutting edge second rake angle, and a third circumferential cutting edge having a third circumferential cutting edge first rake angle and a third circumferential cutting edge second rake angle.
[0009] According to some embodiments of the present invention, in a milling cutter, the angle of the first rake angle of the second circumferential cutting edge is between 2° and 6°, and the angle of the second rake angle of the second circumferential cutting edge is between 10° and 16°.
[0010] According to some embodiments of the present invention, a milling cutter has a second circumferential cutting edge having a first rear clearance angle and a second rear clearance angle, wherein the angle of the first rear clearance angle is between 8° and 11°, and the angle of the second rear clearance angle is between 25° and 30°.
[0011] According to some embodiments of the present invention, a milling cutter has a plurality of end cutting edges at the end of the cutter head away from the shank. Each circumferential cutting edge is connected to an end cutting edge. The plurality of end cutting edges are circumferentially distributed around the axis of the cutter head. The end cutting edges have a front angle, a first rear angle, and a second rear angle. The front angle is between 2° and 6°, the first rear angle is between 12° and 15°, and the second rear angle is between 25° and 30°.
[0012] According to some embodiments of the present invention, a milling cutter has a first flank face on its end cutting edge, the width of which is 0.09 mm to 0.12 mm.
[0013] According to some embodiments of the present invention, a milling cutter has four end cutting edges, including two first sub-circular cutting edges and two second sub-circular cutting edges.
[0014] According to some embodiments of the present invention, a milling cutter has a first cutting edge diameter of D, a core diameter of 0.7D, a second cutting edge diameter of 1.656D, and a third cutting edge diameter of 1.93D.
[0015] According to some embodiments of the present invention, a milling cutter has a chip removal groove formed between any two adjacent first peripheral cutting edges, and the helix angle of the chip removal groove is 25°.
[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0018] Figure 1 This is a schematic diagram of the structure of a milling cutter according to the present invention;
[0019] Figure 2 for Figure 1 A schematic diagram of the cutter head in the diagram;
[0020] Figure 3 for Figure 1 A cross-sectional view of the first cutting edge in the middle;
[0021] Figure 4 for Figure 1 A cross-sectional view of the second cutting edge in the middle;
[0022] Figure 5 for Figure 2 CC section view in the middle;
[0023] Figure 6 for Figure 1 A sectional view of the end cutting edge;
[0024] Figure 7 for Figure 2 AA section view in the middle;
[0025] Figure 8 for Figure 2 BB section view in the middle.
[0026] Figure label:
[0027] Handle 100;
[0028] Cutting head 200, chip removal groove 200a, first peripheral cutting edge 210, first sub-peripheral cutting edge 210a, second sub-peripheral cutting edge 210b, first cutting part 220, second peripheral cutting edge 221, second cutting part 230, third peripheral cutting edge 231, end cutting edge 240, first flank face 241;
[0029] First circumferential cutting edge front angle a1, first circumferential cutting edge first rear angle a2, first circumferential cutting edge second rear angle a3;
[0030] The first front angle of the second circular blade is b1, the second front angle of the second circular blade is b2, the first rear angle of the second circular blade is b3, and the second rear angle of the second circular blade is b4.
[0031] The first front angle of the third blade is c1, the second front angle of the third blade is c2, the first rear angle of the third blade is c3, and the second rear angle of the third blade is c4.
[0032] The front angle of the cutting edge is d1, the first rear angle of the cutting edge is d2, and the second rear angle of the cutting edge is d3. Detailed Implementation
[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0034] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.
[0035] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.
[0036] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0037] The following is for reference. Figures 1 to 8 A milling cutter according to an embodiment of the present utility model will be described in detail.
[0038] refer to Figure 1 and Figure 2 A milling cutter according to an embodiment of the present invention includes a shank 100 and a cutter head 200. The shank 100 is used for clamping the milling cutter. The cutter head 200 is disposed at one end of the shank 100. The cutter head 200 is provided with a plurality of first peripheral cutting edges 210. The plurality of first peripheral cutting edges 210 are circumferentially spaced around the axis of the cutter head 200. The plurality of first peripheral cutting edges 210 include a plurality of first sub-peripheral cutting edges 210a and a plurality of second sub-peripheral cutting edges 210b. The first sub-peripheral cutting edges 210a and the second sub-peripheral cutting edges 210b are alternately distributed circumferentially around the axis of the cutter head 200. The first sub-peripheral cutting edge 210a is provided with a first cutting portion 220 on its flank face. The first cutting portion 220 has a second peripheral cutting edge 221. The second sub-peripheral cutting edge 210b is provided with a second cutting portion 230 on its flank face. The second cutting portion 230 has a third peripheral cutting edge 231. The second cutting portion 230 and the first cutting portion 220 are distributed along the axial direction of the cutter head 200.
[0039] In a milling cutter of this application, a second circumferential cutting edge 221 is disposed on the flank face of the first cutting portion 220 of the first sub-circumferential cutting edge 210a, and a third circumferential cutting edge 231 is disposed on the flank face of the first cutting portion 220 of the second sub-circumferential cutting edge 210b. The first cutting portion 220 and the second cutting portion 230 are distributed along the axial direction of the cutter head 200, such that the second circumferential cutting edge 221 and the third circumferential cutting edge 231 are staggered in the circumferential direction of the cutter head 200, and the second circumferential cutting edge 221 and the third circumferential cutting edge 231 are staggered in the axial direction of the cutter head 200.
[0040] It is understandable that, since the second cutting edge 221 and the third cutting edge 231 are staggered in the axial direction of the cutter head 200, the milling cutter of this application can simultaneously mill two parallel grooves on the same workpiece, thereby improving the milling efficiency of the milling cutter of this application.
[0041] It is understandable that, since the second cutting edge 221 and the third cutting edge 231 are staggered in the circumferential direction of the cutter head 200, during the cutting process of the milling cutter of this application, only one of the second cutting edge 221 and the third cutting edge 231 is in contact with the workpiece at the same time, so as to reduce the load on the milling cutter as a whole from the workpiece and thus extend the service life of the milling cutter.
[0042] It is understandable that, since the second cutting edge 221 and the third cutting edge 231 are staggered in the circumferential direction of the cutter head 200, and the cutting circle radii of the second cutting edge 221 and the third cutting edge 231 are both less than 0.05mm, even if the dimensional difference between the first cutting part 220 and the second cutting part 230 in the radial direction of the cutter head 200 is large, the milling cutter of this application still has high machining accuracy when machining the workpiece.
[0043] refer to Figure 1 and Figure 3 In some embodiments of this utility model, the first circumferential cutting edge 210 has a first rake angle a1, a first clearance angle a2, and a second clearance angle a3. The angle of the first rake angle a1 is between -22° and -28°, the angle of the first clearance angle a2 is between 12° and 15°, and the angle of the second clearance angle a3 is between 25° and 30°. It can be understood that by setting the angle of the first rake angle a1 between -22° and -28° and the angle of the first clearance angle a2 between 12° and 15°, the impact resistance of the first circumferential cutting edge 210 can be improved while ensuring its cutting performance.
[0044] Preferably, the first circumferential cutting edge front angle a1 is -25°, the first circumferential cutting edge rear angle a2 is 13°, and the first circumferential cutting edge rear angle a3 is 27°.
[0045] refer to Figure 4 and Figure 5 In some embodiments of this utility model, the second circumferential cutting edge 221 has a first rake angle b1 and a second rake angle b2, and the third circumferential cutting edge 231 has a first rake angle c1 and a second rake angle c2. It is understood that by setting the first rake angle b1 and the second rake angle b2 on the second circumferential cutting edge 221, and setting the first rake angle c1 and the second rake angle c2 on the third circumferential cutting edge 231, when the dimensional difference between the first cutting portion 220 and the second cutting portion 230 in the radial direction of the cutting head 200 is large, the second circumferential cutting edge 221 and the third circumferential cutting edge 231 still possess good anti-chipping ability and good sharpness.
[0046] like Figure 4 As shown, in some embodiments, the angle of the first rake angle b1 of the second circumferential cutting edge is between 2° and 6°, and the angle of the second rake angle b2 of the second circumferential cutting edge is between 10° and 16°. It is understood that by setting the angle of the first rake angle b1 of the second circumferential cutting edge between 2° and 6°, the end mill as a whole has good cutting performance. Then, by setting the angle of the second rake angle b2 of the second circumferential cutting edge between 10° and 16°, the second circumferential cutting edge 221 not only has good cutting performance but also good anti-chipping and wear-resistant properties, thereby effectively protecting the cutting edge and extending the service life of the end mill.
[0047] Preferably, the angle of the first rake angle b1 of the second circumferential cutting edge is 4°, and the angle of the second rake angle b2 of the second circumferential cutting edge is 13°.
[0048] like Figure 4 As shown, in some embodiments, the second circumferential cutting edge 221 also has a first rear angle b3 and a second rear angle b4. The angle of the first rear angle b3 is between 8° and 11°, and the angle of the second rear angle b4 is between 25° and 30°. It is understood that because the second front angle b2 of the second circumferential cutting edge is relatively large, the overall rigidity and strength of the second circumferential cutting edge 221 are relatively poor. By setting the angle of the first rear angle b3 between 8° and 11°, the overall strength and rigidity of the second circumferential cutting edge 221 can be further guaranteed, thereby improving the overall chipping resistance of the second circumferential cutting edge 221.
[0049] Preferably, the angle of the first rear angle b3 of the second circumferential cutting edge is 10°, and the angle of the second rear angle b4 of the second circumferential cutting edge is 27°.
[0050] like Figure 5As shown, in some embodiments of this utility model, the third circumferential blade 231 also has a first rear angle c3 and a second rear angle c4, the angle of the first rear angle c3 being between 8° and 11°, and the angle of the second rear angle c4 being between 25° and 30°.
[0051] Preferably, the angle of the first rear angle c3 of the third circumferential cutting edge is 10°, and the angle of the second rear angle c4 of the third circumferential cutting edge is 27°.
[0052] refer to Figure 1 and Figure 6 In some embodiments of this utility model, the end of the cutter head 200 away from the shank 100 is provided with a plurality of end cutting edges 240. Each circumferential cutting edge is connected to one end cutting edge 240. The plurality of end cutting edges 240 are circumferentially distributed around the axis of the cutter head 200. The end cutting edge 240 has an end cutting edge rake angle d1, an end cutting edge first clearance angle d2, and an end cutting edge second clearance angle d3. The angle of the end cutting edge rake angle d1 is between 2° and 6°, the angle of the end cutting edge first clearance angle d2 is between 12° and 15°, and the angle of the end cutting edge second clearance angle d3 is between 25° and 30°. It can be understood that by setting the angle of the end cutting edge rake angle d1 between 2° and 6°, the angle of the end cutting edge first clearance angle d2 between 12° and 15°, and the angle of the end cutting edge second clearance angle d3 between 25° and 30°, this universal structural design makes the overall structure of the milling cutter simpler and is more conducive to simplifying the manufacturing process.
[0053] Preferably, the front angle d1 of the end blade is 4°, the first rear angle d2 of the end blade is 13°, and the second rear angle d3 of the end blade is 27°.
[0054] like Figure 6 As shown, in some embodiments, the end face 240 has a first flank face 241, the width of which is 0.09 mm to 0.12 mm. It is understood that by setting the width of the first flank face 241 of the end face 240 between 0.09 mm and 0.12 mm, the manufacturing of the flank face of the end face 240 is relatively simple.
[0055] Preferably, the width of the first flank face 241 is 0.10 mm.
[0056] like Figure 1 As shown, in one embodiment, the end cutting edge 240 is provided with four edges, the first sub-circular cutting edge 210a is provided with two edges, and the second sub-circular cutting edge 210b is provided with two edges. It can be understood that by providing four end cutting edges 240, and the corresponding first sub-circular cutting edge 210a and second sub-circular cutting edge 210b, the cutting efficiency of the milling cutter is further improved.
[0057] It should be understood that the number of end blades 240 can be adjusted according to actual needs and is not limited to the four in the above embodiments.
[0058] refer to Figure 2 , Figure 5 , Figure 7 and Figure 8 In some embodiments of this utility model, the cutting diameter of the first cutting edge 210 is D, the core diameter of the milling cutter is 0.7D, the cutting diameter of the second cutting edge 221 is 1.656D, and the cutting diameter of the third cutting edge 231 is 1.93D. It can be understood that by setting the core diameter of the milling cutter to 0.7D, the rigidity and strength of the milling cutter can be greatly improved while satisfying the chip space requirement.
[0059] refer to Figure 1 In some embodiments of this utility model, a chip removal groove 200a is formed between any two adjacent first peripheral cutting edges 210, and the helix angle of the chip removal groove 200a is 25°. It can be understood that setting the helix angle of the chip removal groove 200a to 25° can further improve the overall strength and rigidity of the milling cutter.
[0060] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A milling cutter, characterized in that include: Tool holder, used for clamping milling cutters; A cutting head is disposed at one end of the cutting shank. The cutting head has a plurality of first circumferential cutting edges, which are circumferentially spaced around the axis of the cutting head. The plurality of first circumferential cutting edges include a plurality of first sub-circumferential cutting edges and a plurality of second sub-circumferential cutting edges. The first sub-circumferential cutting edges and the second sub-circumferential cutting edges are alternately distributed circumferentially around the axis of the cutting head. The first cutting edge has a first cutting portion on its rear cutting surface. The first cutting portion has a second circumferential cutting edge. The second cutting portion has a third circumferential cutting edge. The second cutting portion and the first cutting portion are distributed along the axial direction of the cutting head.
2. A milling cutter according to claim 1, wherein The first circumferential cutting edge has a first circumferential cutting edge front angle, a first circumferential cutting edge rear angle, and a first circumferential cutting edge second rear angle. The angle of the first circumferential cutting edge front angle is between -22 degrees and -28 degrees, the angle of the first circumferential cutting edge rear angle is between 12 degrees and 15 degrees, and the angle of the first circumferential cutting edge second rear angle is between 25 degrees and 30 degrees.
3. The milling cutter according to claim 1, characterized in that The second circumferential cutting edge has a first rake angle and a second rake angle, and the third circumferential cutting edge has a first rake angle and a second rake angle.
4. A milling cutter according to claim 3, wherein The angle of the first rake angle of the second circumferential cutting edge is between 2° and 6°, and the angle of the second rake angle of the second circumferential cutting edge is between 10° and 16°.
5. A milling cutter according to claim 4, wherein The second circumferential blade also has a first rear angle and a second rear angle, the angle of the first rear angle of the second circumferential blade being between 8° and 11°, and the angle of the second rear angle of the second circumferential blade being between 25° and 30°.
6. The milling cutter according to claim 1, wherein The end of the cutter head away from the handle is provided with a plurality of end blades. Each first circumferential blade is connected to a corresponding end blade. The plurality of end blades are circumferentially spaced around the axis of the cutter head. Each end blade has a front angle, a first rear angle, and a second rear angle. The front angle is between 2° and 6°, the first rear angle is between 12° and 15°, and the second rear angle is between 25° and 30°.
7. A milling cutter according to claim 6, wherein The end cutting edge has a first flank face with a width of 0.09 mm to 0.12 mm.
8. A milling cutter according to claim 6 or 7, characterised in that, The end blade has four blades, with two blades in the first sub-circular blade and two blades in the second sub-circular blade.
9. The milling cutter according to claim 1, wherein The first peripheral cutting edge has a cutting diameter of D, the end mill's core diameter is 0.7D, the second peripheral cutting edge has a cutting diameter of 1.656D, and the third peripheral cutting edge has a cutting diameter of 1.93D.
10. The milling cutter according to claim 1, characterized in that A chip removal groove is formed between any two adjacent first peripheral cutting edges, and the helix angle of the chip removal groove is 25°.