A strong roto-cycloid cutter

Abstract

The utility model relates to the field of milling cutter especially relates to a strong power cycloid milling cutter, including first part, connecting portion and second part, the diameter of first part is less than second part, one end of connecting portion is fixedly connected with first part, the other end is fixedly connected with second part, the connecting portion includes three taper surfaces of different tapers connected, and make three taper surfaces be taper surface one, taper surface two and taper surface three respectively, a plurality of helical first blade parts are provided on first part, first blade part includes bottom blade surface and first side blade surface, a plurality of helical second blade parts are provided on connecting portion, second blade part includes second side blade surface, first blade part and second blade part are correspondingly arranged, and second side blade surface is connected with first side blade surface. The utility model discloses through the setting of first part, connecting portion and second part, make the position of milling cutter bearing lateral force mainly be connecting portion, to improve the ability of milling cutter bearing lateral force, thereby reduce the vibration of milling cutter.

Description

Technical Field

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

[0002] Milling cutters are commonly used cutting tools in machining, used to achieve planar and spatial subtractive machining. Generally, a milling cutter consists of a shank and a cutting edge, with the cutting edge having a cutting edge for cutting. Common milling operations typically employ a radial reciprocating motion with simultaneous precession. However, cycloidal milling is used to improve efficiency when removing large areas of material. In cycloidal milling, the cutting edge has a larger contact area with the material. Because the diameter of the central cylindrical portion of the cutting edge is smaller than that of the shank, and because the cutting edge experiences lateral forces not passing through its central axis during cycloidal milling, while the shank is fixed to the spindle via the tool holder, this results in stronger vibrations in the cutting edge.

[0003] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a powerful cycloidal end mill. This utility model is achieved through the following technical solution:

[0005] A powerful cycloidal milling cutter includes a first part, a connecting part, and a second part. The diameter of the first part is smaller than that of the second part. One end of the connecting part is fixedly connected to the first part, and the other end is fixedly connected to the second part. The connecting part includes three connected conical surfaces with different tapers, which are named conical surface one, conical surface two, and conical surface three. The first part is provided with a plurality of helical first cutting edges, each including a bottom cutting edge and a first side cutting edge. The connecting part is provided with a plurality of helical second cutting edges, each including a second side cutting edge. The first and second cutting edges are correspondingly arranged, and the second side cutting edge is in contact with the first side cutting edge.

[0006] In the above technical solution: the first part, the connecting part, and the second part together constitute the basic structure for the milling cutter to withstand lateral and axial forces; the diameter of the first part is smaller than that of the second part to facilitate the setting of the structure on the first part; the setting of the first, second, and third conical surfaces ensures that when the connecting part is subjected to lateral forces, the force can be transmitted from the first conical surface to the third conical surface, thereby making the bending force point located at a position with a larger diameter to improve the bending resistance; the first and second cutting edges are used for cutting; the bottom cutting edge is used to enable the bottom surface of the milling cutter to have a cutting function; the first and second side cutting edges are combined to enable the side surface of the milling cutter to have a cutting function.

[0007] A further feature of this invention is that the inclination angle of the first conical surface is smaller than the inclination angle of the second conical surface, and the inclination angle of the second conical surface is smaller than the inclination angle of the third conical surface.

[0008] In the above technical solution: the tilt angle of cone surface one is smaller than the tilt angle of cone surface two, the tilt angle of cone surface two is smaller than the tilt angle of cone surface three, and the tilt angles increase sequentially, making the connection between cone surface three and the second part more stable, and also facilitating the transmission of the force received by the first part to cone surface three of the connecting part.

[0009] A further feature of this invention is that a chip removal groove is provided between the two first cutting edges, and the cross-sectional shape of the chip removal groove is arc-shaped.

[0010] In the above technical solution: the chip removal groove is used for chip removal.

[0011] A further feature of this invention is that the helix angle of the first cutting edge is 30 degrees.

[0012] In the above technical solution: a small helix angle of 30 degrees is selected so that the base area between the first cutting edge and the workpiece is smaller during cutting, thereby reducing the overall force and lateral force on the first part.

[0013] A further feature of this invention is that the helix angle of the second cutting edge is 30 degrees.

[0014] In the above technical solution, a small helix angle of 30 degrees is selected so that the base area between the second cutting edge and the workpiece is smaller during cutting, thereby reducing the force on the connecting part.

[0015] A further feature of this invention is that the two ends of the bottom edge surface are a lower edge line and an upper edge line, respectively, and the extension line of the lower edge line does not intersect with the central axis of the first part.

[0016] In the above technical solution: the extension line of the lower edge does not intersect with the central axis of the first part, so that while ensuring that the lower edge line of each bottom edge is as long as possible, the bottom edge surfaces are not connected to each other, thus avoiding strong vibration of the bottom edge surfaces and causing chipping.

[0017] A further feature of this invention is that all the lower edge lines are located in the same plane, and all the upper edge lines are located in the same plane.

[0018] In the above technical solution: all lower edge lines are located in the same plane, and all upper edge lines are located in the same plane, so that when the practical bottom cutting surface is used, the friction force on the first part is evenly canceled, reducing the force on the first part.

[0019] This utility model discloses a powerful cycloidal end mill, which, compared with the prior art:

[0020] This utility model, through the arrangement of the first part, the connecting part, and the second part, ensures that the part of the milling cutter that bears the lateral force is mainly the connecting part, thereby improving the milling cutter's ability to withstand lateral forces. At the same time, by setting the first conical surface, the second conical surface, and the third conical surface, the diameter of the part that bears the lateral force is maximized, thereby reducing the vibration of the milling cutter.

[0021] This invention also reduces the lateral force on the first cutting edge by setting a small helix angle, and prevents the extension lines of the lower edge lines of each bottom cutting edge from intersecting with the central axis of the first part, thereby reducing vibration. Attached Figure Description

[0022] Figure 1 This is a side view of the present invention;

[0023] Figure 2 This is a schematic diagram of the connecting part of this utility model;

[0024] Figure 3 This is a schematic diagram of the bottom cutting edge of this utility model.

[0025] The numbers and letters in the diagram represent the following component names: 10 - First part; 101 - First cutting edge; 101a - Bottom cutting edge; 101aa - Lower edge line; 101ab - Upper edge line; 101b - First side cutting edge; 102 - Chip removal groove; 20 - Connecting part; 201 - Second cutting edge; 201a - Second side cutting edge; 30 - Second part; 40 - Cone surface one; 50 - Cone surface two; 60 - Cone surface three. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. These embodiments are implemented based on the technical solution of this utility model and provide detailed implementation methods and specific operation processes. However, the protection scope of this utility model is not limited to the following embodiments.

[0027] like Figure 1-3As shown, this utility model proposes a powerful cycloidal milling cutter, comprising a first part 10, a connecting part 20, and a second part 30. The diameter of the first part 10 is smaller than that of the second part 30. One end of the connecting part 20 is fixedly connected to the first part 10, and the other end is fixedly connected to the second part 30. The connecting part 20 includes three connected conical surfaces with different tapers, namely conical surface 40, conical surface 50, and conical surface 60. The first part 10 is provided with a plurality of spiral first cutting edges 101, each including a bottom cutting surface 101a and a first side cutting surface 101b. The connecting part 20 is provided with a plurality of spiral second cutting edges 201, each including a second side cutting surface 201a. The first cutting edges 101 and the second cutting edges 201 are correspondingly arranged, and the second side cutting surface 201a is in contact with the first side cutting surface 101b. Preferably, the number of first cutting edges 101 is 5; the number of second cutting edges 201 is 5; the first part 10, the second part 30, the connecting part 20, the first cutting edge 101 and the second cutting edge 201 are all integrally formed and then processed.

[0028] like Figure 1-3 As shown, this utility model proposes a powerful cycloidal end mill, wherein the inclination angle of the first conical surface 40 is smaller than that of the second conical surface 50, and the inclination angle of the second conical surface 50 is smaller than that of the third conical surface 60. The inclination angle mentioned above refers to the angle between any normal line of the conical surface and the central axis of the conical surface; in a preferred configuration, the inclination angle of the first conical surface 40 is 4 degrees, the angle of the second conical surface 50 is 6 degrees, and the angle of the third conical surface 60 is 7 degrees.

[0029] like Figure 1-3 As shown, this utility model proposes a powerful cycloidal end mill, in which a chip removal groove 102 is provided between two first cutting edges 101, and the cross-sectional shape of the chip removal groove 102 is arc-shaped. Preferably, the width of the chip removal groove 102 is set according to the distance between two adjacent first cutting edges 101; the chip removal groove 102 can extend to the connecting portion 20.

[0030] like Figure 1-3 As shown, the present invention proposes a powerful cycloidal end mill, wherein the helix angle of the first cutting edge 101 is 30 degrees.

[0031] like Figure 1-3 As shown, the present invention proposes a powerful cycloidal end mill, wherein the helix angle of the second cutting edge 201 is 30 degrees.

[0032] like Figure 1-3As shown, the present invention proposes a powerful cycloidal end mill, wherein the two ends of the bottom cutting surface 101a are respectively the lower edge line 101aa and the upper edge line 101ab, and the extension line of the lower edge line 101aa does not intersect with the central axis of the first part 10.

[0033] like Figure 1-3 As shown, the present invention proposes a powerful cycloidal milling cutter in which all the lower edge lines 101aa are located in the same plane and all the upper edge lines 101ab are located in the same plane.

[0034] The working principle of this utility model is as follows:

[0035] When using this utility model for milling;

[0036] Because the bottom edge rotates and is in full contact with the raw material, it is almost unaffected by lateral forces and is only subjected to axial forces.

[0037] Since the first and second side cutting surfaces are in partial contact with the material, they will bear the force from the raw material, and the first part will be subjected to lateral force.

[0038] The lateral force it receives causes the first part to tend to bend;

[0039] Due to the arrangement of cone surface one, cone surface two, and cone surface three, the bending point caused by lateral force is located at the connection part;

[0040] The connection part, due to the setting of cone surface one, cone surface two and cone surface three, has a larger diameter closer to the second part, thus providing better bending resistance.

[0041] This results in less bending, which in turn reduces the vibration of the milling cutter during high-speed rotation.

[0042] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A powerful cycloidal end mill, characterized in that: The first part (10), the connecting part (20), and the second part (30) are included. The diameter of the first part (10) is smaller than that of the second part (30). One end of the connecting part (20) is fixedly connected to the first part (10), and the other end is fixedly connected to the second part (30). The connecting part (20) includes three connected conical surfaces with different tapers, and the three conical surfaces are named conical surface one (40), conical surface two (50), and conical surface three (60). The first part (10) is provided with a plurality of spiral first cutting edges (101). The first cutting edge (101) includes a bottom cutting edge (101a) and a first side cutting edge (101b). The connecting part (20) is provided with a plurality of spiral second cutting edges (201). The second cutting edge (201) includes a second side cutting edge (201a). The first cutting edge (101) and the second cutting edge (201) are provided correspondingly, and the second side cutting edge (201a) is connected to the first side cutting edge (101b).

2. The powerful cycloidal end mill according to claim 1, characterized in that: The tilt angle of the first cone (40) is smaller than that of the second cone (50), and the tilt angle of the second cone (50) is smaller than that of the third cone (60).

3. A powerful cycloidal end mill according to claim 2, characterized in that: A chip removal groove (102) is provided between the two first cutting edges (101), and the cross-sectional shape of the chip removal groove (102) is arc-shaped.

4. A powerful cycloidal end mill according to claim 2, characterized in that: The helix angle of the first cutting edge (101) is 30 degrees.

5. A powerful cycloidal end mill according to claim 4, characterized in that: The helix angle of the second cutting edge (201) is 30 degrees.

6. A powerful cycloidal end mill according to claim 2, characterized in that: The two ends of the bottom edge surface (101a) are the lower edge line (101aa) and the upper edge line (101ab), respectively, and the extension line of the lower edge line (101aa) does not intersect with the central axis of the first part (10).

7. A powerful cycloidal end mill according to claim 6, characterized in that: All the lower edge lines (101aa) are in the same plane, and all the upper edge lines (101ab) are in the same plane.

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