CN210160488U - Tool bit structure and cutting tool - Google Patents
Tool bit structure and cutting tool Download PDFInfo
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- CN210160488U CN210160488U CN201920747070.1U CN201920747070U CN210160488U CN 210160488 U CN210160488 U CN 210160488U CN 201920747070 U CN201920747070 U CN 201920747070U CN 210160488 U CN210160488 U CN 210160488U
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Abstract
The utility model relates to the technical field of precision finishing tools, and discloses a cutting tool and a tool bit structure thereof, wherein the tool bit structure comprises a connecting part and a cutting edge part arranged at the front end of the connecting part, the cutting edge part comprises a cutting main body fixed at the front end of the connecting part and two or more spiral first cutting edges, the outer surface of the cutting main body is an outwards convex cambered surface, the first cutting edges are arranged on the outer surface of the cutting main body and are respectively positioned at two sides of the vertex of the cutting main body, and a first chip discharge groove is limited between two adjacent first cutting edges; the first cutting edge extends from one side of the cutting body to a top region thereof and then to the other side of the cutting body. The utility model has the advantages that: the first cutting edge penetrates through two sides of the cutting body and deviates from the top point of the cutting body, so that the wear resistance of the cutter can be improved, and the stability of the profile degree and the surface roughness of the machined surface can be ensured.
Description
Technical Field
The utility model relates to a precision finishing instrument technical field especially relates to a tool bit structure and including the cutting tool of this tool bit structure.
Background
The cutting edge is arranged at the center point of the top of the traditional spherical milling cutter, when the spherical milling cutter is used for milling a curved surface, the surface material of a workpiece is usually removed by extruding or cutting at the top point of the cutter, the stress of the cutting edge at the top point of the cutter is concentrated, and therefore the abrasion at the top point of the cutter is large; this results in that, after a certain amount of workpieces are machined, the surface roughness and profile of the later machined workpiece are significantly inferior to those of the workpiece just machined due to the severe wear at the apex of the spherical milling cutter, and the surface roughness and profile of the machined surface of each workpiece are unstable when the workpieces are machined in batches.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, providing a cutting tool, the wearing and tearing of cutter are little in the course of working, can improve the stability of machined surface's roughness and profile tolerance.
In order to achieve the above object, a first aspect of the present invention provides a tool bit structure for a cutting tool, the tool bit structure includes a connecting portion and a cutting edge portion disposed at a front end of the connecting portion, the cutting edge portion includes a cutting main body fixed at the front end of the connecting portion and two or more first cutting edges in a spiral shape, an outer surface of the cutting main body is an outwardly convex arc surface, the first cutting edges are disposed on the outer surface of the cutting main body, each of the first cutting edges is respectively located at two sides of a vertex of the cutting main body, and a first chip discharge groove is defined between two adjacent first cutting edges;
the first cutting edge extends from one side of the cutting body to a top region thereof and then to the other side of the cutting body.
Preferably, the outer surface of the cutting body is a hemispherical surface.
Preferably, the material of the cutting edge portion is any one of polycrystalline diamond, single crystal diamond, chemical vapor deposition diamond, polycrystalline cubic boron nitride, ceramic and hard alloy.
Preferably, both ends of the first cutting edge are provided on an outer surface of the cutting body or extend to an outer surface of the connecting portion.
Preferably, the helix angle of the first cutting edge is 1 ° to 80 °.
Preferably, the diameter of the cutting body is 0.5 to 32mm, the edge width of the first cutting edge is 0.01 to 0.3mm, and the groove depth of the first cutting groove is 0.02 to 0.5 mm.
Preferably, the distance between two adjacent first cutting edges is 0.02mm to 0.5 mm.
Preferably, the first cutting edge is provided with a rake angle of-60 ° to 30 °.
Preferably, the direction of rotation of the first cutting edge is left-handed or right-handed.
Preferably, the direction of rotation of the first cutting edge is right-handed, and the cutting edge of the first cutting edge is disposed on the right side of the first cutting edge.
Preferably, the first cutting edge is integrally formed with the cutting body.
Preferably, the outer surface of the cutting body is further provided with a plurality of spiral second cutting edges, each second cutting edge is respectively arranged at the outer sides of two first cutting edges positioned at the outermost side, and a second chip discharge groove is defined between every two adjacent second cutting edges and between each first cutting edge and the adjacent second cutting edge;
the second cutting edge has the same direction of rotation as the first cutting edge.
Preferably, the diameter of the cutting body is 0.5 to 32mm, the edge width of the second cutting edge is 0.01 to 0.3mm, and the groove depth of the second cutting groove is 0.02 to 0.5 mm.
Preferably, the second cutting edge is provided with a rake angle of-60 ° to 30 °.
Preferably, one end of the second cutting edge is connected to the first cutting edge, and the other end of the second cutting edge is provided on an outer surface of the cutting body or extends to an outer surface of the connecting portion.
Preferably, the second cutting edge is integrally formed with the cutting body.
Preferably, the cutting edge portion and the connecting portion are integrally formed, and the cutting edge portion and the connecting portion are made of the same material.
In a second aspect, the present invention provides a cutting tool comprising a tool shank and a head structure mounted to a front end of the tool shank in accordance with any of the first aspects, wherein a rear end surface of the connecting portion is fixedly connected to a front end surface of the tool shank.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the cutting tool provided by the embodiment of the utility model has the advantages that the tool bit structure comprises a connecting part connected with the tool handle part and a cutting edge part arranged at the front end of the connecting part, the cutting edge part comprises a cutting main body and at least two first cutting edges respectively arranged at two sides of the top point of the outer surface of the cutting main body, the outer surface of the cutting main body is an outwards convex cambered surface, the first cutting edges are in a spiral shape, and the first cutting edges extend to the other side of the cutting main body after extending to the top area of the cutting main body from one side of the cutting main body, so that cutting edges penetrating through the two opposite sides of the cutting main body are formed;
the utility model discloses in, at the milling process, the cutting force mainly relies on the first cutting edge that is located the summit both sides of cutting subject to provide, and because first cutting edge is regional and skew summit through the top of cutting subject, the summit department of cutting subject does not have the cutting edge process, consequently the wearing and tearing of first cutting edge are little at the milling process, have increased substantially cutting tool's wearability to the surface roughness who makes the work piece that processes out is stable, and the work piece profile degree of processing differs for a short time.
Drawings
Fig. 1 is a schematic structural diagram of a tool bit structure according to an embodiment of the present invention;
FIG. 2 is a partial sectional view A-A of FIG. 1;
FIG. 3 is a top view of FIG. 1;
fig. 4 is a schematic structural diagram of a tool bit structure according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a cutting tool according to an embodiment of the present invention.
In the figure: 100. a blade structure;
10. a connecting portion; 20. a cutting edge part; 21. a cutting body; 22. a first cutting edge; 23. a first chip discharge groove; 24. a second cutting edge; 25. a second chip groove;
200. a tool shank.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
In addition, it should be noted that, in the description of the present invention, the terms "front" and "rear" mean that, when the cutting tool is in use, the end close to the machined workpiece is "front" and the end away from the machined workpiece is "rear".
A first aspect of the present invention provides a tool bit structure 100 for a cutting tool, the specific implementation of the tool bit structure 100 is as follows:
example one
As shown in fig. 1 to 3, the present embodiment provides a tip structure 100 for a cutting tool, which includes a connecting portion 10 and a cutting edge portion 20 disposed at a front end of the connecting portion 10, wherein the cutting edge portion 20 includes a cutting body 21 fixed at the front end of the connecting portion 10 and two or more first cutting edges 22 in a spiral shape, an outer surface of the cutting body 21 is an outwardly convex arc surface, the first cutting edges 22 are disposed on the outer surface of the cutting body 21, each first cutting edge 22 is respectively located at two sides of a vertex of the cutting body 21, and a first chip discharge groove 23 is defined between two adjacent first cutting edges 22;
the first cutting edge 22 extends from one side of the cutting body 21 to a top region thereof and then to the other side of the cutting body 21.
Based on the above technical solution, the present embodiment provides a tool bit structure 100 for a cutting tool, where the tool bit structure 100 is mainly used for milling and forming a curved surface of a graphite workpiece, especially a graphite mold, the tool bit structure 100 rotates to drive each first cutting edge 22 to rotate, and since the outer surface of the cutting main body 21 is an outwardly convex arc surface, a tangent method is used to mill a curved surface on the workpiece, and when the first cutting edge 22 rotates, the cutting main body 21 drives the first cutting edge to perform a trajectory motion, thereby completing the milling of the whole curved surface.
Likewise, the tool tip structure 100 of the present embodiment is also suitable for machining workpieces of glass, sapphire, and the like.
In the embodiment, during the milling process, the cutting force is mainly provided by the first cutting edges 22 positioned at the two sides of the vertex of the cutting main body 21, so that the surface roughness of the processed surface can be improved; importantly, as the first cutting edge 22 passes through the top area of the cutting body 21 and deviates from the vertex, no cutting edge passes through the vertex of the cutting body 21, the wear of the first cutting edge 22 is small in the milling process, the wear resistance of the cutting tool is greatly improved, the surface roughness of the machined workpiece is stable, and the profile tolerance of the machined workpieces is not greatly different.
Preferably, in the embodiment, further, when the curved surface is milled by using the milling cutter, the stress point is mainly concentrated on the top area of the cutting body 21, and in order to prevent the chatter phenomenon from occurring during the milling process of the cutter and ensure the surface roughness of the machined curved surface, the outer surface of the cutting body 21 is a hemispherical surface.
Illustratively, in order to maintain the cutting stability of the tool, the first cutting edges 22 are arranged in parallel.
When the tool is used for milling a curved surface, the cutting force is mainly concentrated on the top area of the tool, preferably, in the embodiment, two first cutting edges 22 are arranged on the outer surface of the cutting body 21, the two first cutting edges 22 are respectively located on two sides of the vertex of the cutting body 21, the two first cutting edges 22 are arranged in parallel, and the curved surface milling can be completed through the two first cutting edges 22 and the surface roughness of the machined surface of a workpiece is ensured.
Preferably, in this embodiment, the cutting edge portion 20 of the tool bit structure 100 is made of polycrystalline diamond, and compared with a conventional coated milling cutter, the integral polycrystalline diamond structure greatly increases the wear resistance of the cutting edge, and does not have a situation that a coating is easy to peel off, so that the service life of the cutter is greatly prolonged, and the number of tool changes in a machining process is reduced; and because the polycrystalline diamond has high hardness and good wear resistance, the processing precision and the processing efficiency of the cutter can be effectively improved.
As an alternative, the material of the cutting edge portion 20 may also be any one of single crystal diamond, chemical vapor deposition diamond, polycrystalline cubic boron nitride, ceramic, and hard alloy, and the wear-resistant effect may also be achieved.
In this embodiment, both ends of the first cutting edge 22 extend to the outer side surface of the connecting portion 10, so that the machining range is large; for example, both ends of the first cutting edge 22 may be extended to the rear end face edge of the connecting portion 10.
Referring to fig. 3, the helix angle α of the first cutting edge 22 is 1 to 80 °, and increasing the helix angle of the first cutting edge 22 properly can reduce the cutting force of the tool in the machining process, so that the tool has strong impact resistance, prevents tool vibration, ensures better surface machining quality, and prolongs the service life of the tool, and the strength, sharpness, cutting force and chip removal speed of the first cutting edge 22 are all ideal based on the helix angle.
As shown in fig. 3, the distance between the two side surfaces of the first cutting edge 22 is defined as the edge width L of the first cutting edge 22, wherein the diameter D of the cutting body 21 is 0.5mm to 32mm, and the edge width of the first cutting edge 22 is 0.01 mm to 0.3 mm.
Further, in order to prevent the chips from remaining on the surface of the workpiece to be machined and causing repeated pressing, the groove depth of the first cutting groove 23 is 0.02mm to 0.5mm, and the chips after pressing or cutting can be discharged from the first chip discharge groove 23, so that the surface roughness can be improved.
In this embodiment, the distance between two adjacent first cutting edges 22 is preferably 0.02mm to 0.5mm, which can meet the machining requirements and ensure smooth discharge of chips.
Referring to fig. 2, when viewed from a cross-sectional view a-a of the first cutting edge 22, an included angle between a side surface of the first cutting edge 22 on which the cutting edge is provided and a normal line of the outer surface of the cutting body 21 is a rake angle β, the rake angle of the first cutting edge 22 is set in a range of-60 ° to 30 °, and since the cutting edge of the first cutting edge 22 has the rake angle, the cutting tool is sharp, the extrusion wear is small, and the profile and surface roughness stability of the machined surface of the workpiece can be further improved.
In this embodiment, the direction of rotation of the first cutting edge 22 is right-handed, and the direction in which the chips flow out can be changed by changing the direction of rotation.
Specifically, in the present embodiment, the rotation direction of the first cutting edge 22 is right-handed, and the cutting edge of the first cutting edge 22 is disposed on the right side of the first cutting edge 22.
In this embodiment, the first cutting edge 22 and the cutting body 21 are integrally formed, so that a greater number of first cutting edges 22 can be machined on a smaller cutting body 21, the forming is simpler, and the wear resistance and the service life of the cutting tool can be ensured.
In this embodiment, in order to further improve the wear resistance of the cutter head structure 100, so as to prolong the service life and improve the chip removal capability, the outer surface of the cutting body 21 is further provided with a plurality of spiral second cutting edges 24, each second cutting edge 24 is respectively arranged at the outer sides of two outermost first cutting edges 22, and second chip removal grooves 25 are defined between two adjacent second cutting edges 24 and between the first cutting edge 22 and the second cutting edge 24 adjacent thereto; the second cutting edge 24 has the same direction of rotation as the first cutting edge 22. Due to the fact that the second cutting edge 24 is arranged, multiple edges can participate in extrusion grinding, the abrasion degree of the cutter is reduced, the rotation direction of the second cutting edge 24 and the rotation direction of the first cutting edge 22 are kept consistent, the chip removal direction is consistent, smooth chip removal is facilitated, and the surface roughness of a machined workpiece can be improved.
Specifically, one end of the second cutting edge 24 is connected to the first cutting edge 22, and the second cutting edge 24 is connected to the first cutting edge 22 in a staggered manner, so that the profile of the machined surface can be effectively guaranteed; and the other end of the second cutting edge 24 extends to the outer side surface of the connecting part 10, so that the processing range is wide.
Specifically, the diameter of the cutting body 21 is 0.5mm to 32mm, the width of the second cutting edge 24 is 0.01 mm to 0.3mm, and the depth of the second cutting groove 25 is 0.02mm to 0.5mm, so that a large number of second cutting edges 24 can be machined in the cutting body 21, thereby improving the surface roughness of the machined surface.
Similarly, with reference to the above description of the rake angle β of the first cutting edge 22, the second cutting edge 24 is provided with a rake angle of-60 ° to 30 °, ensuring cutting ability and improving surface roughness.
In order to facilitate the forming and ensure the wear resistance and the service life of the cutting tool, the second cutting edge 24 and the cutting body 21 are integrally formed, and a plurality of second cutting edges 24 can be designed according to the use requirement.
Further, the cutting edge part 20 and the connecting part 10 are integrally formed, so that the forming is facilitated, and the material of the cutting edge part 20 is the same as that of the connecting part 10.
Example two
Referring specifically to fig. 4, the present embodiment provides another cutting head structure 100, and the present embodiment differs from the first embodiment only in that: both ends of the first cutting edge 22 are provided on the outer surface of the cutting body 21; one end of the second cutting edge 24 is connected to the first cutting edge 22, and the other end of the second cutting edge 24 is provided on the outer surface of the first cutting body 21.
In the present embodiment, for example, both ends of the first cutting edge 22 are provided at the connection between the cutting body 21 and the connecting portion 10; one end of the second cutting edge 24 is connected to the first cutting edge 22, and the other end of the second cutting edge 24 is provided at the connection point between the cutting body 21 and the connecting portion 10.
In a second aspect of the embodiments of the present invention, there is provided a cutting tool, referring to fig. 5 in particular, the cutting tool comprises a tool shank 200 and a tool bit structure 100 mounted at the front end of the tool shank 200 as in any one of the first aspect, wherein the rear end surface of the connecting portion 10 is fixedly connected to the front end surface of the tool shank 200.
The cutting tool of the present invention, including the cutting head structure 100 according to any one of the embodiments of the first aspect, has all the advantages of the cutting head structure 100, which are not described herein.
To sum up, the embodiment of the present invention provides a tool bit structure and a cutting tool including the same, the tool bit structure includes a connecting portion for connecting with a tool shank portion and a cutting edge portion disposed at a front end of the connecting portion, the cutting edge portion includes a cutting main body and at least two first cutting edges disposed at two sides of a vertex of an outer surface of the cutting main body, the outer surface of the cutting main body is an outwardly convex arc surface, the first cutting edges are spiral, and the first cutting edges extend from one side of the cutting main body to a top region thereof and then extend to the other side of the cutting main body; the utility model discloses in, at the milling process, the cutting force mainly relies on the first cutting edge that is located the summit both sides of cutting subject to provide, and because first cutting edge is regional and skew summit through the top of cutting subject, the summit department of cutting subject does not have the cutting edge process, consequently the wearing and tearing of first cutting edge are little at the milling process, have increased substantially cutting tool's wearability to the surface roughness who makes the work piece that processes out is stable, and the work piece profile degree of processing differs for a short time.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (19)
1. A cutter head structure is characterized by comprising a connecting part and a cutting edge part arranged at the front end of the connecting part, wherein the cutting edge part comprises a cutting main body fixed at the front end of the connecting part and two or more spiral first cutting edges, the outer surface of the cutting main body is an outwards convex cambered surface, the first cutting edges are arranged on the outer surface of the cutting main body and are respectively positioned at two sides of the vertex of the cutting main body, and a first chip discharge groove is defined between every two adjacent first cutting edges;
the first cutting edge extends from one side of the cutting body to a top region thereof and then to the other side of the cutting body.
2. The bit structure of claim 1 wherein the outer surface of the cutting body is hemispherical.
3. The bit structure of claim 1 wherein each of said first cutting edges are disposed in parallel.
4. The cutter head structure according to claim 1, wherein the material of the cutting edge portion is any one of polycrystalline diamond, single crystal diamond, chemical vapor deposition diamond, polycrystalline cubic boron nitride, ceramic, and cemented carbide.
5. The bit structure of claim 1, wherein both ends of the first cutting edge are disposed on an outer surface of the cutting body or extend to an outer side surface of the connecting portion.
6. The tool tip structure of claim 1 wherein the helix angle of the first cutting edge is between 1 ° and 80 °.
7. The bit structure of claim 1, wherein the diameter of the cutting body is 0.5mm to 32mm, the edge width of the first cutting edge is 0.01 to 0.3mm, and the groove depth of the first cutting groove is 0.02mm to 0.5 mm.
8. The bit structure of claim 7 wherein the distance between adjacent ones of said first cutting edges is between 0.02mm and 0.5 mm.
9. The bit structure of claim 1, wherein said first cutting edge is provided with a rake angle of-60 ° to 30 °.
10. The bit structure of claim 1 wherein the direction of rotation of said first cutting edge is left-handed or right-handed.
11. The cutter head structure of claim 1 wherein said first cutting edge has a right hand orientation and said cutting edge of said first cutting edge is disposed to the right of said first cutting edge.
12. The cutter head structure of claim 1 wherein said first cutting edge is integrally formed with said cutting body.
13. The cutter head structure according to any one of claims 1 to 12, wherein the outer surface of the cutting body is further provided with a plurality of second cutting edges having a spiral shape, each of the second cutting edges being disposed outside of two outermost first cutting edges, and second chip flutes being defined between adjacent ones of the second cutting edges and between the first cutting edges and the second cutting edges adjacent thereto;
the second cutting edge has the same direction of rotation as the first cutting edge.
14. The cutter head structure of claim 13, wherein one end of the second cutting edge is connected to the first cutting edge, and the other end of the second cutting edge is provided on an outer surface of the cutting body or extends to an outer side surface of the connecting portion.
15. The cutter head structure of claim 13, wherein the diameter of the cutting body is 0.5mm to 32mm, the edge width of the second cutting edge is 0.01 to 0.3mm, and the groove depth of the second cutting groove is 0.02mm to 0.5 mm.
16. The cutter head structure of claim 13 wherein said second cutting edge is provided with a rake angle of-60 ° to 30 °.
17. The cutter head structure of claim 13 wherein said second cutting edge is integrally formed with said cutting body.
18. The cutter head structure according to claim 1, wherein the cutting edge portion and the connecting portion are integrally formed, and the material of the cutting edge portion and the material of the connecting portion are the same.
19. A cutting tool comprising a tool shank and a bit structure according to any one of claims 1 to 18 mounted to a forward end of the tool shank, a rear end face of the connecting portion being fixedly connected to a forward end face of the tool shank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920747070.1U CN210160488U (en) | 2019-05-22 | 2019-05-22 | Tool bit structure and cutting tool |
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| CN201920747070.1U CN210160488U (en) | 2019-05-22 | 2019-05-22 | Tool bit structure and cutting tool |
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| CN210160488U true CN210160488U (en) | 2020-03-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110064788A (en) * | 2019-05-22 | 2019-07-30 | 汇专绿色工具有限公司 | A kind of cutter head structure and cutting tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110064788A (en) * | 2019-05-22 | 2019-07-30 | 汇专绿色工具有限公司 | A kind of cutter head structure and cutting tool |
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Inventor after: Yan Bingjiang Inventor after: Wang Chengyong Inventor after: Li Weiqiu Inventor before: Yan Bingjiang Inventor before: Li Weiqiu |