Cutting Tools

Abstract

The present invention discloses a cutting tool, which relates to the field of cutting processing technology. The cutting tool comprises a main body and a cutting part. The main body has a connecting hole that penetrates along the axial direction. The cutting part is arranged on the outer peripheral surface of the main body. The two opposite side surfaces of the cutting part in the axial direction of the connecting hole are respectively a first side surface and a second side surface. The two opposite side surfaces of the cutting part in the circumferential direction of the connecting hole are respectively a third side surface and a fourth side surface. A plurality of sub-cutting parts arranged in a step-like manner along the axial direction of the connecting hole are formed between the first side surface, the second side surface, the third side surface and the fourth side surface. The side surface of the sub-cutting part away from the main body in the radial direction of the connecting hole is a first step surface. The intersection position of the first step surface and the third side surface forms a first cutting edge. In the radial direction of the main body, at least two first cutting edges protrude at different distances from the outer peripheral surface of the main body. The cutting tool according to the present invention can simultaneously meet the requirements of slotting, cutting and cutting, with low cost and high processing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of cutting processing, in particular to a cutting tool. Background Art

[0002] In the metal processing and cutting industry, when machining a part, it is usually completed by a complete set of tools and processing solutions, which involve drilling tools, turning tools, slotting tools, and boring tools. Due to the large number of required tool categories, a large number of different tools are installed on the machine tool, and different tools are added to the parts in sequence and steps. This has an impact on the cost of the tool, the complexity of the installation of the machine tool tool holder, and the processing efficiency of the machine tool. Therefore, there is room for improvement. Summary of the invention

[0003] The present invention provides a cutting tool, which has the advantages of high processing efficiency and low use cost.

[0004] According to an embodiment of the present invention, a cutting tool includes: a main body portion, the main body portion having a connecting hole that passes through in the axial direction; a cutting portion, which is arranged on the outer peripheral surface of the main body portion, the opposite side surfaces of the cutting portion in the axial direction of the connecting hole are respectively a first side surface and a second side surface, and the opposite side surfaces of the cutting portion on the peripheral surface of the connecting hole are respectively a third side surface and a fourth side surface, a plurality of sub-cutting portions arranged in a step-like manner along the axial direction of the connecting hole are formed between the first side surface, the second side surface, the third side surface and the fourth side surface, the side surface of the sub-cutting portion away from the main body portion in the radial direction of the connecting hole is a first step surface, and the intersection of the first step surface and the third side surface forms a first cutting edge, wherein, in the radial direction of the connecting hole, the distances between at least two of the first cutting edges and the outer peripheral surface of the main body portion are different.

[0005] The cutting tool according to the embodiment of the present invention can cut grooves of at least two different depths at the same time, and the cutting tool can meet the requirements of grooving, cutting and cutting at the same time, thereby increasing the function of the cutting tool, which is beneficial to reducing the types of tools required for cutting to reduce the cost of the cutting tool, and at the same time can better reduce the number of tool changes, which is beneficial to improving the processing efficiency of the cutting tool on the workpiece.

[0006] According to some embodiments of the present invention, in the direction from the first side surface to the second side surface, the distance between the plurality of first cutting edges and the outer peripheral surface of the main body portion in the radial direction of the connecting hole increases sequentially.

[0007] According to some embodiments of the present invention, in the direction from the first side surface to the second side surface, the first cutting edge extends obliquely toward a direction close to a central axis of the connecting hole.

[0008] According to some embodiments of the present invention, an angle γ between the first cutting edge and the axial direction of the main body satisfies: 0°<γ≤2°.

[0009] According to some embodiments of the present invention, the first cutting edge is parallel to the axial direction of the main body.

[0010] According to some embodiments of the present invention, the plurality of first cutting edges are parallel.

[0011] According to some embodiments of the present invention, in the direction from the third side surface to the fourth side surface, the first step surface extends obliquely toward a direction close to a central axis of the connecting hole.

[0012] According to some embodiments of the present invention, the angle between the first step surface and the third side surface is less than 90°; and / or the third side surface is an arc surface that is concave toward the connection position between the cutting portion and the main body portion.

[0013] According to some embodiments of the present invention, in the axial direction of the main body, the end face of the main body adjacent to the first side face is a first end face, the end face of the main body adjacent to the second side face is a second end face, the distance between the first side face and the second end face is smaller than the distance between the first end face and the second end face, and the distance between the second side face and the first end face is smaller than the distance between the second end face and the first end face.

[0014] According to some embodiments of the present invention, in a direction along the radial direction of the connecting hole toward a center axis of the connecting hole, the first side surface and the second side surface extend obliquely toward each other.

[0015] According to some embodiments of the present invention, the angle α between the first side surface and the reference surface satisfies: 2°≤α≤7°, the angle β between the second side surface and the reference surface satisfies: 2°≤β≤7°, and the reference surface is perpendicular to the axial direction of the connecting hole.

[0016] According to some embodiments of the present invention, in the axial direction of the connecting hole, the side of the sub-cutting portion away from the second side surface is a second step surface, the intersection of the second step surface and the third side surface forms a second cutting edge, and the intersection of the first step surface, the second step surface and the third side surface forms an angle edge, and in the direction from the angle edge to the main body, the second cutting edge extends obliquely toward the direction close to the second side surface.

[0017] According to some embodiments of the present invention, the angle λ between the second cutting edge and the reference surface satisfies: 3°≤λ≤8°, and the reference surface is perpendicular to the axial direction of the connecting hole.

[0018] According to some embodiments of the present invention, a plurality of the cutting parts are provided, and the plurality of the cutting parts are arranged on the outer peripheral surface of the main body along the circumference of the connecting hole.

[0019] According to some embodiments of the present invention, the plurality of cutting portions are identical.

[0020] According to some embodiments of the present invention, at least two of the cutting portions are different.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a cutting tool according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 A magnified image of area A;

[0024] Figure 3 is a schematic diagram of a cutting tool according to an embodiment of the present invention from another angle;

[0025] Figure 4 is a side view of a cutting tool according to an embodiment of the present invention;

[0026] Figure 5 yes Figure 4 Magnified view of area B.

[0027] Reference numerals:

[0028] Cutting tool 100;

[0029] Main body 1; connecting hole 11; first end surface 12; second end surface 13;

[0030] Cutting portion 2; first side surface 21; second side surface 22; third side surface 23; fourth side surface 24; first step surface 251; first cutting edge 252; second step surface 253; second cutting edge 254; corner edge 255; first side edge 261; second side edge 262; first edge corner edge 263; second edge corner edge 264. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific processes and examples of materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0033] A cutting tool 100 according to an embodiment of the present invention will be described below with reference to the drawings.

[0034] like Figures 1 to 5 As shown, the cutting tool 100 according to the embodiment of the present invention comprises: a main body 1 and a cutting part 2, the main body 1 having a connecting hole 11 penetrating in the axial direction, wherein the tool handle can be inserted into the connecting hole 11 to be connected with the main body 1, so that the fixing of the cutting tool 100 can be achieved through the cooperation between the connecting hole 11 and the tool handle. The cutting part 2 is arranged on the outer peripheral surface of the main body 1, and the two opposite side surfaces of the cutting part 2 in the axial direction of the connecting hole 11 are respectively the first side surface 21 and the second side surface 22, and the two opposite side surfaces of the cutting part 2 on the peripheral surface of the connecting hole 11 are respectively the third side surface 23 and the fourth side surface 24, and a plurality of sub-cutting parts arranged in a step-like manner along the axial direction of the connecting hole 11 are formed between the first side surface 21, the second side surface 22, the third side surface 23 and the fourth side surface 24, and the side surface of the sub-cutting part away from the main body 1 in the radial direction of the connecting hole 11 is the first step surface 251, and the intersection position of the first step surface 251 and the third side surface 23 forms the first cutting edge 252.

[0035] That is to say, the first step surfaces 251 of the plurality of sub-cutting portions can form a plurality of first cutting edges 252 arranged along the axial direction of the connecting hole 11 at the intersection with the third side surface 23, where the plurality refers to two or more, such as two, three, four, five, etc. The first cutting edges 252 extend roughly along the axial direction of the connecting hole 11, that is, the cutting portion 2 has a plurality of first cutting edges 252 arranged along the axial direction of the connecting hole 11, wherein. In the radial direction of the connecting hole 11, the distances between at least two first cutting edges 252 and the outer peripheral surface of the main body 1 are different. It can be understood that in the process of cutting a workpiece by the cutting tool 100, the distance between the first cutting edge 252 and the outer peripheral surface of the main body 1 is proportional to the depth of the groove that can be cut by the first cutting edge 252.

[0036] Therefore, by setting different distances between at least two first cutting edges 252 and the outer peripheral surface of the main body 1, the cutting tool 100 can cut at least two grooves of different depths at the same time, which can greatly improve the processing efficiency of the cutting tool 100; in addition, the first cutting edge 252 farthest from the outer peripheral surface of the main body 1 can be used to cut the workpiece, that is, the cutting tool 100 can meet the needs of grooving, cutting and cutting at the same time, thereby increasing the function of the cutting tool 100, which is beneficial to reducing the types of tools required for cutting to reduce the cost of the cutting tool 100, and at the same time can greatly reduce the number of tool changes, which is beneficial to improving the processing efficiency of the cutting tool 100 on the workpiece.

[0037] The cutting tool 100 according to the embodiment of the present invention can cut grooves of at least two different depths at the same time, and the cutting tool 100 can meet the requirements of grooving, cutting and cutting at the same time, thereby increasing the function of the cutting tool 100, helping to reduce the types of tools required for cutting to reduce the cost of the cutting tool 100, and at the same time can better reduce the number of tool changes, which is conducive to improving the processing efficiency of the cutting tool 100 on the workpiece.

[0038] According to some embodiments of the present invention, in the direction from the first side surface 21 to the second side surface 22, the distance between the plurality of first cutting edges 252 and the outer peripheral surface of the main body 1 in the radial direction of the connecting hole 11 increases successively. That is, the first cutting edge 252 closest to the first side surface 21 among the plurality of first cutting edges 252 has the smallest distance between the outer peripheral surface of the main body 1 in the radial direction of the connecting hole 11, and the first cutting edge 252 closest to the second side surface 22 among the plurality of first cutting edges 252 has the largest distance between the outer peripheral surface of the main body 1 in the radial direction of the connecting hole 11. Thus, the cutting part 2 can be used to cut on the workpiece at one time to form a plurality of grooves whose depths decrease successively along the axial direction of the connecting hole 11, thereby improving the cutting efficiency. In addition, it is convenient for the cutting tool 100 to enter the workpiece from the position of the first side surface 21, and the workpiece has been subjected to boring processes such as reaming, that is, the cutting tool 100 can also have the function of a boring tool, thereby facilitating the increase of the integrated functions of the cutting tool 100, and further facilitating the reduction of the types of the cutting tool 100 to reduce the use cost.

[0039] Specifically, when the cutting tool 100 is used to cut grooves on the outer peripheral surface of the workpiece, the multiple first cutting edges 252 of the cutting portion 2 can cut a plurality of grooves on the outer peripheral surface of the workpiece at one time, which are arranged axially along the connecting hole 11 and whose outer diameters gradually decrease. When the cutting tool 100 is used to expand or bore the original hole, the cutting tool 100 can feed in the direction from the second side surface 22 to the first side surface 21, that is, the cutting tool 100 first enters the original hole at one end adjacent to the first side surface 21 in the axial direction of the connecting hole 11, so that the multiple first cutting edges 252 of the cutting portion 2 can cut a plurality of grooves on the inner peripheral surface of the original hole at one time, which are arranged circumferentially along the connecting hole 11 and whose inner diameters gradually increase.

[0040] According to some embodiments of the present invention, in the direction from the first side surface 21 to the second side surface 22, the first cutting edge 252 extends obliquely toward the direction of the central axis close to the connecting hole 11. That is, there is an angle between the extension direction of the first cutting edge 252 and the axial direction of the connecting hole 11, and in the axial direction of the connecting hole 11, the distance between the end of the first cutting edge 252 adjacent to the first side surface 21 and the outer peripheral surface of the main body 1 is greater than the distance between the end of the first cutting edge 252 adjacent to the second side surface 22 and the outer peripheral surface of the main body 1. Therefore, when feeding along the radial direction of the workpiece, the end of the first cutting edge 252 adjacent to the first side surface 21 first contacts the outer peripheral surface of the workpiece, thereby reducing the contact area to reduce the cutting resistance, which is conducive to improving the sharpness of the cutting portion 2. In addition, when feeding along the axial direction of the workpiece, only the end of the first cutting edge 252 adjacent to the first side surface 21 cuts the workpiece, and during the feeding process, the portion of the first cutting edge 252 adjacent to the second side surface 22 can always maintain a spaced-apart state from the workpiece, which can better improve the cutting effect of the cutting portion 2 on the workpiece and reduce the resistance during the feeding process.

[0041] According to some embodiments of the present invention, the angle γ between the first cutting edge 252 and the axial direction of the main body 1 satisfies: 0°<γ≤2°. That is, the angle between the extension direction of the first cutting edge 252 and the central axis of the main body 1 is controlled within a range of no more than two degrees. For example, the angle between the extension direction of the first cutting edge 252 and the central axis of the main body 1 can be 0.2°, 0.3°, 0.5°, 0.7°, 0.9°, 1.2°, 1.4°, 1.7°, 2°, etc., and no specific limitation is made here. In the process of cutting a groove on the outer peripheral surface of the workpiece by feeding along the radial direction of the workpiece, since the first cutting edge 252 is inclined relative to the central axis of the connecting hole 11, the part of the workpiece in contact with the first cutting edge 252 is formed into a truncated cone shape during the cutting process. Therefore, after the groove cutting depth in the radial direction meets the requirements, the tool needs to be withdrawn along the axial direction of the workpiece to trim the truncated cone-shaped groove bottom into a cylindrical groove bottom through the end of the first cutting edge 252 adjacent to the first side surface 21. The larger the angle between the extension direction of the first cutting edge 252 and the central axis of the main body 1, the larger the part of the end of the first cutting edge 252 adjacent to the first side surface 21 needs to be cut when trimming to a cylindrical groove bottom. Therefore, by controlling the angle between the extension direction of the first cutting edge 252 and the central axis of the main body 1 within a range of no more than two degrees, the difficulty of trimming the corresponding first cutting edge 252 part on the workpiece can be reduced while ensuring the sharpness of the cutting part 2.

[0042] According to some embodiments of the present invention, the first cutting edge 252 is parallel to the axial direction of the main body 1. In other words, the first cutting edge 252 extends along the axial direction of the main body 1. Therefore, when the first cutting edge 252 is cut along the radial direction of the workpiece, the part of the workpiece in contact with the first cutting edge 252 can be directly cut to be parallel to the axial direction of the connecting hole 11, thereby better improving the cutting efficiency.

[0043] According to some embodiments of the present invention, the plurality of first cutting edges 252 are parallel to each other, thereby improving the consistency of the surface of the workpiece cut by the plurality of first cutting edges 252 and facilitating the cutting effect of the cutting tool 100 on the workpiece.

[0044] According to some embodiments of the present invention, in the direction from the third side surface 23 to the fourth side surface 24, the first step surface 251 extends obliquely toward the direction close to the central axis of the connecting hole 11. That is, in the radial direction of the connecting hole 11, the distance between the position where the first step surface 251 intersects with the third side surface 23 and the central axis of the connecting hole 11 is greater than the distance between the position where the first step surface 251 intersects with the fourth side surface 24 and the central axis of the connecting hole 11, that is, the distance between the first cutting edge 252 and the central axis of the connecting hole 11 is greater than the distance between the position where the first step surface 251 intersects with the fourth side surface 24 and the central axis of the connecting hole 11. Therefore, when the first cutting edge 252 cuts the workpiece, the portion of the first step surface 251 other than the first cutting edge 252 can be better formed in a spaced-away state from the workpiece.

[0045] According to some embodiments of the present invention, the angle between the first step surface 251 and the third side surface 23 is less than 90°. That is, the angle between the first step surface 251 and the third side surface 23 is an acute angle. Since the intersection of the first step surface 251 and the third side surface 23 forms the first cutting edge 252, the smaller the angle between the first step surface 251 and the third side surface 23, the sharper the first cutting edge 252. As a result, the sharpness of the first cutting edge 252 can be improved to improve the cutting effect of the cutting tool 100. Among them, the angle between the first step surface 251 and the third side surface 23 can be 60°, 65, 70°, 75°, 80°, 85°, 89°, etc., and no specific restrictions are made here.

[0046] According to some embodiments of the present invention, the third side surface 23 is an arc surface that is concave toward the connection position between the cutting portion 2 and the main body 1. Therefore, in the process of cutting the workpiece by the first cutting edge 252, the third side surface 23 can better control the direction of cutting and chip breaking, that is, by setting the third side surface 23 concave, a chip breaker groove of the cutting portion 2 can be formed, thereby preventing chips and chip breaking from affecting the cutting of the workpiece by the cutting portion 2, which is beneficial to improving the stability of the cutting tool 100.

[0047] According to some embodiments of the present invention, in the axial direction of the main body 1, the end face of the main body 1 adjacent to the first side face 21 is the first end face 12, and the end face of the main body 1 adjacent to the second side face 22 is the second end face 13. The distance between the first side face 21 and the second end face 13 is smaller than the distance between the first end face 12 and the second end face 13, and the distance between the second side face 22 and the first end face 12 is smaller than the distance between the second end face 13 and the first end face 12. In other words, the cutting portion 2 is provided on the outer peripheral surface of the main body 1 and is located between the first end face 12 and the second end face 13 in the axial direction of the connecting hole 11. In the axial direction of the connecting hole 11, the first side face 21 is spaced apart from the first end face 12, and the second side face 22 is spaced apart from the second end face 13. As a result, the support stability of the main body 1 on the cutting portion 2 can be improved, which is conducive to improving the structural strength of the cutting tool 100 and improving the reliability of the use of the cutting tool 100.

[0048] According to some embodiments of the present invention, in the direction of the radial direction of the connecting hole 11 toward the central axis of the connecting hole 11, the first side surface 21 and the second side surface 22 extend obliquely toward each other. That is, in the direction from the first step surface 251 toward the central axis of the connecting hole 11, the first side surface 21 is formed as an inclined surface obliquely extending toward the direction close to the second side surface 22, and the second side surface 22 is formed as an inclined surface obliquely extending toward the direction close to the first side surface 21. Thus, when the cutting tool 100 feeds and cuts along the axial direction of the workpiece, the first side surface 21 and the second side surface 22 can be in a spaced-away state from the workpiece, so that the friction generated by the contact between the first side surface 21 or the second side surface 22 and the workpiece and the damage to the cut portion 2 of the workpiece can be reduced, which is conducive to improving the cutting efficiency and cutting effect of the cutting tool 100.

[0049] According to some embodiments of the present invention, the angle α between the first side surface 21 and the reference surface (L shown in the figure) satisfies: 2°≤α≤7°, the angle β between the second side surface 22 and the reference surface satisfies: 2°≤β≤7°, and the reference surface is perpendicular to the axial direction of the connecting hole 11. That is, the inclination angles of the first side surface 21 and the second side surface 22 relative to the reference surface are both controlled within the range of 2° to 7°, for example, the inclination angles of the first side surface 21 and the second side surface 22 relative to the reference surface can be 2°, 2.5°, 3°, 3.5°, 4°, 4.5°, 5°, 5.5°, 6°, 7°, etc., and no specific limitation is made here. Among them, the smaller the inclination angle of the first side surface 21 and the second side surface 22 relative to the reference plane, the worse the air avoidance effect of the first side surface 21 and the second side surface 22, and the larger the connection position between the root of the cutting part 2 and the main body 1. Conversely, the larger the inclination angle of the first side surface 21 and the second side surface 22 relative to the reference plane, the better the air avoidance effect of the first side surface 21 and the second side surface 22, and the smaller the connection position between the root of the cutting part 2 and the main body 1.

[0050] Therefore, by controlling the inclination angles of the first side surface 21 and the second side surface 22 relative to the reference plane within the range of 2° to 7°, it is possible to prevent the inclination angles of the first side surface 21 and the second side surface 22 relative to the reference plane from being too small to affect the air avoidance effect of the first side surface 21 and the second side surface 22. At the same time, it is possible to prevent the inclination angles of the first side surface 21 and the second side surface 22 relative to the reference plane from being too large to affect the connection strength between the cutting portion 2 and the main body 1. This can ensure the air avoidance effect of the first side surface 21 and the second side surface 22 while improving the connection strength between the cutting portion 2 and the main body 1.

[0051] According to some embodiments of the present invention, in the axial direction of the connection hole 11, the side of the sub-cutting portion away from the second side surface 22 is a second step surface 253, the intersection of the second step surface 253 and the third side surface 23 forms a second cutting edge 254, the intersection of the first step surface 251, the second step surface 253 and the third side surface 23 forms an angle edge 255, and in the direction from the angle edge 255 to the main body 1, the second cutting edge 254 extends obliquely toward the direction close to the second side surface 22. That is, the angle edge 255 is formed at the intersection of the first cutting edge 252 and the second cutting edge 254 of the same sub-cutting portion, and the extension direction of the second cutting edge 254 has an angle with the reference plane perpendicular to the central axis of the connection hole 11.

[0052] Therefore, when the cutting is performed along the axial direction of the workpiece, the angle edge 255 contacts the workpiece first, wherein the angle edge 255 is relatively sharp, thereby effectively reducing the contact area between the cutting portion 2 and the workpiece during the cutting process to reduce the cutting resistance, thereby improving the sharpness of the cutting portion 2. In addition, when the cutting is performed along the radial direction of the workpiece, only the angle edge 255 contacts the workpiece, and during the cutting process, the second step surface 253 can always maintain a spaced-away state from the workpiece, thereby effectively improving the cutting effect of the cutting portion 2 on the workpiece, while reducing the resistance during the cutting process.

[0053] According to some embodiments of the present invention, the angle λ between the second cutting edge 254 and the reference surface satisfies: 3°≤λ≤8°, and the reference surface is perpendicular to the axial direction of the connecting hole 11. That is, the inclination angle of the second cutting edge 254 relative to the reference surface is controlled within the range of 3° to 8°. For example, the inclination angle of the second cutting edge 254 relative to the reference surface can be 3°, 3.5°, 4°, 4.5°, 5°, 5.5°, 6°, 6.5°, 7°, 8°, etc., and no specific restrictions are made here. Among them, the smaller the inclination angle of the second cutting edge 254 relative to the reference surface, the worse the air avoidance effect of the second step surface 253, and the stronger the structural strength of the sub-cutting portion. Conversely, the larger the inclination angle of the second cutting edge 254 relative to the reference surface, the better the air avoidance effect of the second step surface 253, and the worse the structural strength of the sub-cutting portion.

[0054] Therefore, by controlling the inclination angle of the second cutting edge 254 relative to the reference surface within the range of 3° to 8°, it is possible to prevent the inclination angle of the second cutting edge 254 relative to the reference surface from being too small to affect the air avoidance effect of the second step surface 253, and at the same time, it is possible to prevent the inclination angle of the second cutting edge 254 relative to the reference surface from being too large to affect the structural strength of the sub-cutting portion, thereby ensuring the structural strength of the sub-cutting portion while ensuring the air avoidance effect of the second step surface 253.

[0055] According to some embodiments of the present invention, the cutting part 2 is provided in plurality, and the plurality of cutting parts 2 are arranged on the outer peripheral surface of the main body 1 along the circumference of the connecting hole 11. Therefore, the position of the cutting tool can be adjusted to use any one of the plurality of cutting parts 2 for cutting operation, and the cutting tool 100 has high flexibility in use.

[0056] According to some embodiments of the present invention, the plurality of cutting parts 2 are identical. That is, the plurality of cutting parts 2 have the same cutting function. Thus, during the processing of workpieces of the same specification, when one of the cutting parts 2 is damaged, it is only necessary to use another intact cutting part 2 to perform the cutting operation by rotating the cutting tool 100. Thus, the tool changing frequency can be reduced, which is conducive to improving the processing efficiency.

[0057] According to some embodiments of the present invention, at least two cutting parts 2 are different. That is, there are at least two cutting parts 2 with different cutting functions. Thus, the corresponding cutting part 2 on the cutting tool 100 can be flexibly selected according to the processing requirements of the workpiece, that is, a plurality of cutting parts 2 with different cutting functions can be integrated into the same cutting tool, which can reduce the number of cutting tools 100 to reduce management difficulty and cost. Specifically, when a circular workpiece is cut by the cutting tool 100, when the size of the multiple grooves on the inner circumference of the workpiece is different from the size of the multiple grooves on the outer circumference of the workpiece, one of the cutting parts 2 can be set to a specification corresponding to the multiple grooves on the inner circumference of the workpiece, and the other cutting part 2 can be set to a specification corresponding to the multiple grooves on the outer circumference of the workpiece, so that there is no need to change the tool during the processing of the workpiece, which is conducive to improving the processing efficiency.

[0058] Reference below Figure 1-Figure 5 The cutting tool 100 according to a specific embodiment of the present invention is described. It is worth noting that the following description is only exemplary and intended to be used to explain the present invention, and cannot be construed as limiting the present invention.

[0059] The cutting tool 100 includes a main body 1 and a plurality of cutting parts 2. A through connecting hole 11 is formed in the main body 1. The plurality of cutting parts 2 are arranged on the outer peripheral surface of the main body 1 along the circumference of the connecting hole 11. The two end faces of the main body 1 in the axial direction of the connecting hole 11 are respectively a first end face 12 and a second end face 13. The cutting part 2 is located between the first end face 12 and the second end face 13. The side of the cutting part 2 adjacent to the first end face 12 in the axial direction of the connecting hole 11 is a first side face 21. The cutting part 2 adjacent to the second end face 13 in the axial direction of the connecting hole 11 is a first side face 22. The side surface of the cutting portion 2 is the second side surface 22, and in the direction along the radial direction of the connecting hole 11 toward the central axis of the connecting hole 11, the first side surface 21 and the second side surface 22 extend obliquely toward each other, and the two side surfaces of the cutting portion 2 in the circumferential direction of the connecting hole 11 are respectively the third side surface 23 and the fourth side surface 24, and the third side surface 23 and the fourth side surface 24 are respectively connected to the first side surface 21 and the second side surface 22 at both ends in the axial direction of the connecting hole 11, and the cutting portion 2 is connected to the first side surface 21, the second side surface 22, the third side surface 23 and the fourth side surface A plurality of sub-cutting portions arranged in a step shape are formed between the third side surface 23 and the fourth side surface 24, the outer peripheral surface of the sub-cutting portion is formed as a first step surface 251, and the side of the sub-cutting portion away from the second side surface 22 in the axial direction of the connecting hole 11 is a second step surface 253. In the direction from the third side surface 23 to the fourth side surface 24, the first step surface 251 extends obliquely toward the direction close to the central axis of the connecting hole 11, and the angle between the first step surface 251 and the third side surface 23 is an acute angle. The third side surface 23 is formed as an arc surface concave toward the connection position of the cutting portion 2 and the main body 1. In the radial direction of the connection hole 11 toward the direction close to the central axis of the connection hole 11, the second step surface 253 extends obliquely toward the direction close to the second side surface 22, the intersection of the first step surface 251 and the third side surface 23 forms the first cutting edge 252, the intersection of the second step surface 253 and the third side surface 23 forms the second cutting edge 254, and the intersection of the first step surface 251, the second step surface 253 and the third side surface 23, that is, the intersection of the first cutting edge 252 and the second cutting edge 254, forms the corner edge 255. In the direction from the first side surface 21 to the second side surface 22, the distance between the plurality of first cutting edges 252 and the central axis of the connection hole 11 increases, the first cutting edge 252 and the second cutting edge 254 both extend obliquely toward the direction close to the central axis of the connection hole 11, and the length of the first cutting edge 252 in the axial direction of the connection hole 11 and the length of the second cutting edge 254 in the radial direction of the connection hole 11 are flexibly adjusted according to the size of the plurality of grooves on the workpiece.

[0060] In addition, the intersection of the third side surface 23 and the first side surface 21 forms a first edge 261, the intersection of the third side surface 23 and the second side surface 22 forms a second edge edge 262, the intersection of the first cutting edge 252 closest to the first side surface 21 and the first side edge 261 forms a second edge angle edge 264, and the intersection of the first cutting edge 252 closest to the second side surface 22 and the second side edge 262 forms a first edge angle edge 263.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0063] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cutting tool, characterized in that: include: A main body, wherein the main body has a connecting hole extending therethrough in the axial direction; 14. The repairing tool of claim 13 wherein the plurality of cutting tools are provided on a side of the cutting tool holder and a plurality of cutting tools are provided on the side of the cutting tool holder. In the axial direction of the connecting hole, the side of the sub-cutting portion away from the second side surface is a second step surface, the intersection of the second step surface and the third side surface forms a second cutting edge, and the intersection of the first step surface, the second step surface and the third side surface forms an angle edge, and in the direction from the angle edge to the main body, the second cutting edge extends obliquely toward the direction close to the second side surface.

2. The cutting tool according to claim 1, characterized in that An included angle γ between the first cutting edge and the axial direction of the main body portion satisfies: 0°<γ≤2°.

3. The cutting tool according to claim 1, characterized in that The plurality of first cutting edges are parallel to each other.

4. The cutting tool according to claim 1, characterized in that In a direction from the third side surface to the fourth side surface, the first step surface extends obliquely toward a direction close to a central axis of the connecting hole.

5. The cutting tool according to claim 4, characterized in that The included angle between the first step surface and the third side surface is less than 90°; and / or the third side surface is an arc surface that is concave toward the connection position between the cutting portion and the main body portion.

6. The cutting tool according to claim 1, characterized in that In the axial direction of the main body, the end face of the main body adjacent to the first side face is the first end face, the end face of the main body adjacent to the second side face is the second end face, the distance between the first side face and the second end face is smaller than the distance between the first end face and the second end face, and the distance between the second side face and the first end face is smaller than the distance between the second end face and the first end face.

7. The cutting tool according to claim 1, characterized in that In a direction approaching the central axis of the connecting hole along the radial direction of the connecting hole, the first side surface and the second side surface extend obliquely in a direction approaching each other.

8. The cutting tool according to claim 7, characterized in that An angle α between the first side surface and a reference surface satisfies: 2°≤α≤7°, an angle β between the second side surface and the reference surface satisfies: 2°≤β≤7°, and the reference surface is perpendicular to the axial direction of the connecting hole.

9. The cutting tool according to claim 8, characterized in that An included angle λ between the second cutting edge and the reference surface satisfies: 3°≤λ≤8°, and the reference surface is perpendicular to the axial direction of the connecting hole.

10. The cutting tool according to claim 1, characterized in that A plurality of the cutting parts are provided, and the plurality of the cutting parts are arranged on the outer peripheral surface of the main body along the circumferential direction of the connecting hole.

11. The cutting tool according to claim 10, characterized in that The plurality of cutting portions are all identical.

12. The cutting tool according to claim 10, characterized in that At least two of the cutting portions are different.

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