Chamfering cutter
By setting cutting edges with different shear angles on the chamfering cutter, the problems of high-frequency vibration and increased cutting resistance during the chamfering process are solved, efficient and stable hole processing is achieved, the resonance and chipping problems of the chamfering cutter are avoided, and the processing quality is improved.
Patent Information
- Application Number
- CN202422616320.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-10-29
AI Technical Summary
Existing hole processing tools are prone to high-frequency vibration and increased cutting resistance during the chamfering process, resulting in unstable processing performance. In particular, chamfering tools with equally divided cutting edges are prone to resonance at the large end, while chamfering tools with unequal cutting edges have low strength and are prone to chipping at the small end.
A chamfering cutter is designed, which combines equally divided and unequally divided cutting edges. By setting cutting edges with different shear angles on the cutting part, it is made into equally divided cutting at the small end and gradually changes to unequal cutting at the large end. The shear angle increases or decreases in sequence to avoid high-frequency vibration.
It achieves the goal of reducing or even eliminating high-frequency vibration while ensuring cutting efficiency, avoiding problems such as uneven machined surfaces and inability to continue cutting, and combines the advantages of equally divided and unequally divided cutting edges to improve machining performance.
Smart Images
Figure CN223368388U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hole processing tools, in particular to a chamfering tool. Background Art
[0002] At present, the hole chamfering tools that are more commonly used in the processing of countersinking and other holes are generally divided into two types. One is a chamfering tool with three equally divided cutting edges, and the other is a chamfering tool with three unequally divided cutting edges. When the chamfering tool with equally divided cutting edges is chamfering, the diameter of the small end is small, and the cutting is light, but the cutting resistance increases as the diameter at the large end increases. When the cutting resistance increases, resonance will occur and cause high-frequency vibration, making the chamfered surface uneven or unable to continue cutting; and the chamfering tool with unequal cutting edges, although not easy to cause cutting resonance, its small end diameter is small, and the unequal distribution will make one of the edges have a small width, and its low strength is prone to chipping during cutting, which also affects the unequal distribution, and large-angle unequal design cannot be made. In response to the above defects, the present application is proposed. Utility Model Content
[0003] The utility model aims to provide a chamfering cutter which combines the advantages of an unequal cutting edge and an equal cutting edge chamfering cutter, thereby ensuring processing efficiency while avoiding high-frequency vibration that affects processing performance.
[0004] In order to solve the above problems, the utility model provides a chamfering tool, comprising a cutting part and a shank, wherein the cutting part is provided with at least three cutting edges, and the axial shear angles of the three cutting edges are different. The different shear angles of the three cutting edges form a cutting edge with equal diameters at the small end of the cutting part, and form a cutting edge with unequal diameters at the large end, so that the chamfering tool can perform equal cutting when cutting at the small end, thereby ensuring cutting efficiency, and continue cutting down to the large end and gradually change to unequal cutting to avoid high-frequency vibration, thereby affecting processing performance.
[0005] According to an embodiment of the present invention, the shearing angles of the cutting edges increase or decrease sequentially, and the greater the difference in the shearing angles, the greater the difference in the unequal angles at the large end.
[0006] Optionally, the shear angle of each cutting edge may be increased or decreased by a fixed value, such as an increase of X° at each time. Alternatively, the shear angle of each cutting edge may be increased or decreased by a non-fixed value, and the increase or decrease values may be regular or irregular.
[0007] Optionally, the smaller shear angle is -4°~4°.
[0008] Optionally, a medium shear angle is 2° to 10°.
[0009] Optionally, the larger shear angle is 6°~14°.
[0010] Preferably, the unequal angles of the large end of the cutting portion are 111°, 124° and 125° respectively.
[0011] The beneficial effect of the present invention is that by setting shear angles of different angles on the cutting edge, the chamfering tool can perform equal cutting when cutting the small end, ensuring cutting efficiency, and gradually transform into unequal cutting when cutting to the large end, which can reduce or even eliminate resonance, thereby ensuring cutting performance and avoiding the problem of high-frequency vibration causing the poured surface to be uneven or unable to continue cutting. It combines the advantages of unequal cutting edges and equal cutting edge chamfering tools, and largely avoids the disadvantages of the two. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0013] Figure 1 Schematic diagram of the overall structure of the chamfering cutter;
[0014] Figure 2 It is a structural diagram of a smaller shear angle;
[0015] Figure 3 It is a schematic diagram of the structure with a medium shear angle;
[0016] Figure 4 Schematic diagram of the structure with a larger shear angle;
[0017] Figure 5 This is a schematic diagram of the angle of the equally divided cutting edge at the small end of the chamfering cutter;
[0018] Figure 6 This is a schematic diagram of the angles of the unequally divided cutting edge at the large end of the chamfering cutter. DETAILED DESCRIPTION
[0019] The following description is intended only to disclose the present invention and to enable those skilled in the art to implement the present invention. The embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present invention.
[0020] Example 1:
[0021] A chamfering cutter, such as Figure 1 , including a cutting part 1 and a shank 2, the cutting part 1 is provided with three cutting edges. It should be noted that, in other embodiments, the cutting edges are not limited to three, and can be set to more than three groups of cutting edges.
[0022] like Figure 2-Figure 4The three cutting edges are cutting edge 3, cutting edge 4 and cutting edge 5, and the axial shear angles of cutting edge 3, cutting edge 4 and cutting edge 5 are shear angle 6, shear angle 7 and shear angle 8 respectively. The angles of shear angle 6, shear angle 7 and shear angle 8 are different. In this embodiment, the angles are increased successively. The angle of shear angle 6 is -4°~4°, the angle of shear angle 7 is 2°~10°, and the angle of shear angle 8 is 6°~14°. The greater the angle difference between the shear angles, the greater the unequal phase difference at the large end of the chamfering cutter.
[0023] like Figure 5 The different shear angles of the three cutting edges form cutting edges with equal diameters at the small end of the cone angle 12 of the cutting part 1, both of which are 120°, and cutting edges with unequal diameters at the large end, such as Figure 6 In this embodiment, the three unequal angles of the large end of the cutting portion 1 can be selected as index angle 9, index angle 10 and index angle 11, and the angles of index angle 9, index angle 10 and index angle 11 are A1: 111°, A2: 124° and A3: 125° respectively, so that the chamfering cutter can perform equal cutting when cutting at the small end to ensure cutting efficiency, and continue to cut down to the large end and gradually change to unequal cutting, which can reduce or even eliminate resonance, thereby ensuring cutting performance and avoiding the problem of high-frequency vibration causing the poured surface to be uneven or unable to continue cutting.
[0024] Example 2:
[0025] Based on Example 1, in this embodiment, the increasing or decreasing values of the shear angle of the cutting edge are successively set to fixed values or non-fixed values. When the values are non-fixed, the increasing or decreasing values may change regularly or irregularly.
[0026] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations and modifications may be made to the embodiments of the present invention without departing from the principles described.
Claims
1. A chamfering tool, characterized by: The invention comprises a cutting portion (1) and a shank portion (2), wherein the cutting portion (1) is provided with at least three cutting edges, wherein the three cutting edges have different axial shearing angles, and the different shearing angles of the three cutting edges form a cutting edge with equal diameters at the small end of the cutting portion (1) and form a cutting edge with unequal diameters at the large end.
2. The chamfering cutter according to claim 1, characterized in that: The shearing angles of the cutting edges increase or decrease in sequence.
3. The chamfering cutter according to claim 2, characterized in that: The increasing value or decreasing value of the shearing angle of each cutting edge is a fixed value.
4. The chamfering cutter according to claim 2, characterized in that: The increasing value or decreasing value of the shearing angle of each cutting edge is a non-fixed value.
5. The chamfering cutter according to any one of claims 1 to 4, characterized in that: The smaller shear angle is -4°~4°.
6. The chamfering cutter according to claim 5, characterized in that: The medium shear angle is 2°~10°.
7. The chamfering cutter according to claim 6, characterized in that: The larger shear angle is 6°~14°.
8. The chamfering cutter according to any one of claims 1 to 4, characterized in that: The unequal angles of the large end of the cutting portion (1) are 111°, 124° and 125° respectively.