CN112355333B - Cutter and cutter head structure thereof - Google Patents
Cutter and cutter head structure thereof Download PDFInfo
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- CN112355333B CN112355333B CN202011128687.9A CN202011128687A CN112355333B CN 112355333 B CN112355333 B CN 112355333B CN 202011128687 A CN202011128687 A CN 202011128687A CN 112355333 B CN112355333 B CN 112355333B
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- cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/04—Overall shape
- B23B2200/0461—Round
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2200/00—Details of cutting inserts
- B23B2200/32—Chip breaking or chip evacuation
- B23B2200/325—Chip breaking or chip evacuation by multiple chip-breaking grooves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention discloses a cutter and a cutter head mechanism thereof, wherein the cutter head mechanism comprises: the cutting body comprises a front end face and a rear end face which are oppositely arranged, and an outer peripheral surface which is connected with the front end face and the rear end face, the plurality of cutting edges are circumferentially arranged on the outer peripheral surface at intervals by taking a central shaft of the cutting body as a center, the cutting edges are spiral, chip removal grooves are arranged between two adjacent cutting edges, and the diameter of the front end of the cutting body isMillimeter, rear end diameter of cutting body isThe dimensions of the millimeter-scale of the material,observing the cross section of the cutter head structure along the front end of the cutter head structure, wherein the groove width of the chip removal groove is a mm, the blade width of the cutting edge is c1 mm, and the number of the cutting edges is n, wherein:k is a correction coefficient with a value range of 0.6-1.3, and a is more than or equal to 0.1 mm. The cutter can effectively improve the machining precision and the surface roughness of the machined surface and greatly prolong the service life of the cutter.
Description
Technical Field
The invention relates to the technical field of precision machining, in particular to a cutter and a cutter head structure thereof.
Background
In the case of surface processing of a workpiece made of a hard brittle material, for example: materials such as glass, sapphire, graphite and the like, a grinding head cutter is usually required in the prior art, but the existing grinding head cutter has the following problems: firstly, it is difficult to ensure good machining precision and roughness of the machined surface of a workpiece, so that polishing time of a later stage process of the workpiece is influenced, and mass production of products is not facilitated; in addition, the service life of the cutter is short.
Disclosure of Invention
An object of the present application is to provide a tool bit structure, which can improve its own service life while guaranteeing the processing requirements by optimizing the structure. Another object of the present application is to provide a tool comprising the tool bit structure described above.
The purpose of the application is realized through the following technical scheme:
a cutter head structure, comprising: the cutting device comprises a cutting main body and a plurality of cutting edges arranged on the cutting main body, wherein the cutting main body comprises a front end face, a rear end face and an outer peripheral face, the front end face and the rear end face are oppositely arranged, the outer peripheral face is in a circular shape which is coaxially arranged, the outer peripheral face is in a concave or convex curved surface, the plurality of cutting edges are circumferentially arranged on the outer peripheral face at intervals by taking a central shaft of the cutting main body as a center, the cutting edges are spiral, and chip grooves are arranged between two adjacent cutting edges;
the diameter of the front end of the cutting main body isMillimeter, the rear end diameter of the cutting body is +.>The dimensions of the millimeter-scale of the material,observing the cross section of the cutter head structure along the front end of the cutter head structure, wherein the groove width of the chip removal groove is a millimeter, the blade width of the cutting edge is c1 millimeter, and the number of the cutting edges is n, wherein:
k is a correction coefficient with a value range of 0.6-1.3, and a is more than or equal to 0.1 mm.
In some embodiments of the present application, in any cross section of the tool bit structure, it is required to satisfy:
in some embodiments of the present application, the number of cutting edges is 20 to 120.
In some embodiments of the present application, the cutting edge has a cutting edge width of 0.01 mm to 0.3 mm.
In some embodiments of the present application, the spiral direction of the cutting edge is left-handed or right-handed, and an included angle between a tangent line at the front end of the cutting edge of the cutting tooth and a tangent line at the rear end of the cutting edge is β, where β=5° to 150 °.
In some embodiments of the present application, each cutting edge is: the rear end extends to the edge of the rear end face, and the front end extends to the edge of the front end face; or alternatively, the process may be performed,
some of the cutting edges are long cutting edges, the rear ends of the cutting edges extend to the outer edge of the rear end face, the front ends of the cutting edges extend to the edge of the front end face, the rest of the cutting edges are short cutting edges, the rear ends of the cutting edges extend to the edge of the front end face, gaps are reserved between the front ends and the edge of the front end face, and the long cutting edges and the short cutting edges are uniformly distributed along the circumferential direction.
In some embodiments of the present application, the rake angle of the cutting edge is-60 ° to 30 °, and the rake angles are not identical from place to place along the same extending direction of the cutting edge.
In some embodiments of the present application, the cutting edge is integrally formed on the cutting body.
In some embodiments of the present application, the cutting edge is laser formed on the cutting body.
In some embodiments of the present application, the cutting edge is provided with a plurality of chip breakers at intervals, and the chip breakers are arranged on the top surface of the cutting edge and penetrate through two sides of the cutting edge.
In some embodiments of the present application, the chip breaker groove includes two sidewalls disposed opposite to each other and intersecting at a bottom, and an included angle between each sidewall and a top surface of the cutting edge is an obtuse angle.
In some embodiments of the present application, the flute depth of the chip flute is h1, the flute depth of the chip breaker is h2, and the maximum width of the chip breaker along the radial direction of the cutting body is c2, wherein: h2 = (0.1-0.2) ·h1, the included angle between each side wall and the top surface of the cutting edge is greater than 90 ° and less than 170 °.
In some embodiments of the present application, the chip breakers on two adjacent cutting edges are distributed in a staggered manner.
In some embodiments of the present application, some of the cutting edges are long cutting edges, the rear ends of the cutting edges extend to the outer edge of the rear end face, the front ends of the cutting edges extend to the edge of the front end face, the rest of the cutting edges are short cutting edges, the rear ends of the cutting edges extend to the edge of the front end face, a space is reserved between the front ends and the edge of the front end face, and the long cutting edges and the short cutting edges are uniformly distributed along the circumferential direction;
the front section of the long cutting edge protrudes from the position of the short cutting edge and is not provided with the chip breaking groove.
In some embodiments of the present application, the relief angle of the cutting edge is 0 ° to 30 °.
In some embodiments of the present application, the cutting body and the cutting edge are made of any one of polycrystalline diamond, monocrystalline diamond, chemical vapor deposition diamond, polycrystalline cubic boron nitride, ceramic, and cemented carbide.
In some embodiments of the present application, the cutting tool further comprises a connecting portion provided at a rear end of the rear end face of the cutting body.
A tool, comprising:
a cutter bar; and
the tool bit structure of any one of the above claims, wherein a rear end of the tool bit structure is mounted to a front end of the tool bar.
The utility model provides a tool bit structure and cutter, cutter and tool bit structure 100 in this application, each cutting edge circumference are on the outer peripheral face of heliciform locating cutting main part, through optimizing the number of edges of cutter front end cutting edge, the width of cutting edge and the slot width of chip groove for when observing along the cross section of tool bit structure front end, can satisfy following functional relation:
wherein K is a correction coefficient with a value range of 0.6-1.3, and a is more than or equal to 0.1 mm;for cutting body the front end diameter is +.>For the rear end diameter of the cutting body +.>a is the groove width of the chip removal groove, c1 is the blade width of the cutting edge, and n is the number of the cutting edges; when the functional relation is met, the machining precision and the roughness of the machined surface of the workpiece can be effectively improved, and the service life of the cutter can be greatly prolonged.
Drawings
The present application is described in further detail below in conjunction with the drawings and preferred embodiments, but it will be appreciated by those skilled in the art that these drawings are drawn for the purpose of illustrating the preferred embodiments only and thus should not be taken as limiting the scope of the present application. Moreover, unless specifically indicated otherwise, the drawings are merely intended to conceptually illustrate the compositions or constructions of the described objects and may contain exaggerated representations, and the drawings are not necessarily drawn to scale.
FIG. 1 is a schematic view of a tool according to a first embodiment of the present application;
FIG. 2 is a schematic view of the bit configuration of the tool of FIG. 1;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is an enlarged schematic view of portion A of FIG. 4;
FIG. 6 is an enlarged schematic view of portion B of FIG. 5;
FIG. 7 is a schematic cross-sectional view of FIG. 2 along its front end;
FIG. 8 is an enlarged partial schematic view of one of the cutting edges of FIG. 7;
FIG. 9 is a schematic view of a head structure of a cutter in a fourth embodiment of the present application;
FIG. 10 is an enlarged schematic view of portion C of FIG. 9;
fig. 11 is a left side view of fig. 10.
In the figure, 100, the cutter head structure; 1. a cutting body; 11. a front end face; 12. a rear end face; 13. an outer peripheral surface; 2. a cutting edge; 21. a chip breaker; 211. a sidewall; 22. a long cutting edge; 23. a short cutting edge; 24. a cutting edge; 3. a chip removal groove; 4. a connection part;
200. a cutter bar;
-a radius of the front face of the cutting body; />-a radius of the rear end face of the cutting body; b-axial length of the cutting body;
a-groove width of the chip removal groove; h1, groove depth of the chip removal groove; rake angle of gamma-cutting edge; the relief angle of the alpha-cutting edge; c1-the cutting edge width of the cutting edge; beta-an included angle between a tangent line at the front end of the cutting edge and a tangent line at the rear end of the cutting edge is observed along the top view of the cutter head structure;
h 2-groove depth of the chip breaker groove; c 2-maximum width of the chip breaker in the radial direction of the cutting body.
Detailed Description
Preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive, exemplary, and should not be construed as limiting the scope of the present application.
First, it should be noted that the top, bottom, upward, downward, etc. orientations referred to herein are defined with respect to the orientation in the various figures, are relative concepts and thus can be changed depending on the different positions they are in and the different practical states. These and other orientations, therefore, are not to be considered limiting.
It should be noted that the term "comprising" does not exclude other elements or steps and the "a" or "an" does not exclude a plurality.
Furthermore, it should also be noted that, for any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the figures, a combination can still be continued between these technical features (or equivalents thereof) to obtain other embodiments of the present application not directly mentioned herein.
It should also be understood that the terms "first," "second," and the like are used herein to describe various information, but that such information should not be limited to these terms, which are used merely to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the present application.
It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.
In the case of machining a workpiece with the tool of the present application, an end close to the machined workpiece is defined as a "front end", and an end away from the machined workpiece is defined as a "rear end".
The tool is mainly used for chamfering workpieces made of materials such as glass.
As shown in fig. 1-11, there is provided a tool comprising: cutter bar 200 and cutter head structure 100 provided at the front end of cutter bar 200.
Specifically, as shown in fig. 2-3, the bit structure 100 includes: the cutting body 1 and a plurality of cutting edges 2 integrally formed on the cutting body 1, the cutting body 1 comprises a front end face 11, a rear end face 12 and an outer peripheral face 13 which is connected with the front end face 11 and the rear end face 12, the front end face 11 and the rear end face 12 are coaxially arranged and circular, the outer peripheral face 13 is curved, the plurality of cutting edges 2 are circumferentially arranged on the outer peripheral face 13 at intervals with the central axis of the cutting body 1 as the center, the cutting edges 2 are spiral, and chip grooves 3 are arranged between two adjacent cutting edges 2.
The outer peripheral surface 13 of the cutting body 1 in the present application may be a concave curved surface or a convex curved surface, which is determined in particular according to the form of chamfer required in the machined work piece.
The dimensions of the cutting body 1 are generally selected and determined according to the surface profile to be machined, wherein the diameter of the front face 11 of the cutting body 1 isThe diameter of the rear face 12 is +.>And->
Typically, specific dimensions of the cutting body range from: diameter of the front end face 11 of the cutting body 1The value of (2) is 1 mm to 10 mm, and the diameter of the rear end face 12 of the cutting body 1 is +.>The value range of the axial length b of the cutting body 1 is 3-25 mm, and the value range of the axial length b is 1-8 mm.
In order to enable the tool to meet the machining precision and the surface roughness and to improve the service life of the tool at the same time, in the present application, the following functional relationship needs to be satisfied when the cross section of the tool bit structure 100 along the front end thereof is observed:
k is a correction coefficient with a value range of 0.6-1.3, and a is more than or equal to 0.1 mm;
wherein: a is the groove width of the chip groove 3, c1 is the blade width of the cutting edge 2, the units of a and c1 are millimeter, and n is the number of the cutting edges 2.
Further, in this embodiment, the chip groove 3 has a groove width ofBy optimizing the number of cutting edges 2 at each position along the radial direction of the cutting body 1, the groove width of the chip removing groove 3 at each position is set to be 0.1 mm-2 mm; therefore, the cutting precision and the surface roughness can be ensured, and the chip containing and removing performances can be ensured, so that the machining precision is further improved, and the service life of the cutter is effectively prolonged.
Typically, the number of cutting edges is 20 to 120; the cutting performance can be ensured, and the cutting life of the cutter can be ensured.
In addition, in order to ensure the strength and wear resistance of the cutting edge 2 and to ensure chip-holding performance at the same time, in the present embodiment, the flute depth h1=0.05 to 0.5 mm of the chip groove 3, and the edge width c1=0.01 to 0.3 mm of the cutting edge 2 are specifically referred to as shown in fig. 8.
The range of the included angle beta between the tangent lines at the front end and the rear end of the cutting edge 24 of the cutting edge 2 in the present application is usually set to 5-150 degrees, and the cutting resistance can be effectively reduced while the machining quality is ensured, as shown in fig. 4.
And the cutting edge 2 may be left-hand or right-hand, and the cutting edge 24 may be distributed on the left or right side of the cutting edge 2, i.e. the following forms may exist: the right-handed cutting edge 2 and the cutting edge 24 are arranged on the right side of the cutting edge 2, the right-handed cutting edge 2 and the cutting edge 24 are arranged on the left side, the left-handed cutting edge 2 and the cutting edge 24 are arranged on the right side, or the left-handed cutting edge 2 and the cutting edge 24 are arranged on the left side.
In the application, in order to ensure the cutting effect and improve the cutting efficiency, the rake angle of the cutting edge 2 is gamma, gamma= -60-30 degrees, and the cutting edge is shown in fig. 3; wherein, the rake angle gamma is the included angle between the rake face and the basal plane measured in the orthogonal plane; in addition, in the present embodiment, the rake angle γ of each position is not exactly the same along the extending direction of the cutting edge 2, and the stress of each position along the extending direction of the cutting edge 2 is not the same during the processing of the workpiece by the tool, so the rake angle γ of each position of the cutting edge 2 is set to be suitable for the stress of each position, so that the stress can be dispersed, and the anti-seismic performance of the tool can be effectively improved.
Preferably, the rake angle γ of the cutting edge 2 in this embodiment has a value in the range of 5 ° to 20 °.
In the present application, the relief angle α of the cutting edge 2 is 0 ° to 30 °, and referring to fig. 3, the relief angle α is an included angle between the relief surface and the cutting surface measured in an orthogonal plane; the subsequent increase of the angle alpha reduces the cutting resistance, but at the same time the strength of the cutting edge 2 may be reduced, and the present embodiment enables further optimization of the tool performance by a rational setting of the relief angle alpha of the cutting edge 2.
Preferably, the relief angle α of the cutting edge 2 in the present application is 0 ° to 15 °. The method comprises the following steps: 0 °, 5 °,10 °.
In order to facilitate the flexible arrangement of the number of cutting edges 2 on the cutting body 1 and to facilitate the machining of the rake angles that are not identical everywhere, the cutting edges 2 are integrally formed on the cutting body 1.
In this embodiment, in order to ensure the machining precision of the tool itself and to facilitate the forming process, the cutting edge 2 is integrally formed on the cutting body 1 by laser, and the cutting edge 2 can be formed into different rake angles along the extending direction thereof according to actual needs by laser forming.
Further, in this embodiment, in order to prevent scraps from winding the tool to affect the machining precision of the workpiece and to reduce the cutting resistance, a plurality of chip breakers 21 are provided on the cutting edge 2 at intervals, and the chip breakers 21 are provided on the top surface of the cutting edge 2 and penetrate through both sides thereof, as shown in fig. 5 and 6.
In addition, as shown in fig. 6, the chip breaker 21 in the present application includes two opposite side walls 211 which are arranged and the bottoms of which are intersected, and the included angle between the side walls 211 and the top surface of the cutting edge 2 is an obtuse angle, that is, is in a V shape as a whole, and by avoiding the vertical top surfaces of the two sides of the chip breaker 21 or being in an acute angle with the top surface, the wear resistance of the two sides of the chip breaker 21 can be ensured to be kept the same, and the line mark generated on the machined workpiece in the machining process is avoided.
Preferably, as shown in fig. 7 and 8, the flute depth of the chip flute 3 is h1, the edge width of the cutting edge 2 is c1, specifically, the edge width c1 is the width of the top surface of the cutting edge 2 measured in an orthogonal plane, continuing to refer to fig. 6, the flute depth of the chip breaker 21 is h2, and the maximum width of the chip breaker 21 in the radial direction of the cutting body 1 is c2, wherein: h2 = (0.1-0.2) ·h1, and the included angle between each side wall and the top surface of the cutting edge is greater than 90 ° and smaller than 170 °, by optimally designing the size of the chip breaker 21, the chip removal performance can be further improved, and the chip breaker 21 is ensured to be opened without generating line marks on the machined workpiece.
Further, in order to smoothly discharge chips and avoid line marks on the machining surface of the machined workpiece, the chip breakers 21 on two adjacent cutting edges 2 are staggered, as shown in fig. 5.
In addition, the material of the tool bit structure 100 in the present application is any one of polycrystalline diamond, monocrystalline diamond, chemical vapor deposition diamond, polycrystalline cubic boron nitride, ceramic, and cemented carbide, and preferably, the cutting body 1 and the cutting edge 2 are integrally formed from the above materials; the cutter has high hardness and good wear resistance, and can effectively improve the machining precision and the machining efficiency.
As shown in fig. 2, the tool bit structure 100 in the present application further includes a connecting portion 4, the connecting portion 4 being provided at the rear end of the rear end surface 12 of the cutting body 1, and the tool bit structure 100 being attached to the front end of the tool holder 200 via the connecting portion 4.
Several specific examples of tools in the present application are listed below:
example 1
As shown in fig. 1 to 8, in the cutter of the present embodiment, in the cutter head structure 100, the rear end of each cutting edge 2 extends to the edge of the rear end face 12 of the cutting body 1, and the front end of each cutting edge 2 extends to the edge of the front end face 11 of the cutting body 1; at this time, the groove width of each junk slot 3 gradually narrows from the rear to the front.
In the present embodiment, the diameter of the front end face 11 of the cutting body 1 isThe diameter of the rear end face 12 of the cutting body 1 is +.>The axial length of the cutting body 1 is b=1.66 mm, the number of cutting edges is 60, and since each cutting edge extends to the edge of the front end face 11 of the cutting body 1, the number of edges n=60 in the cross section of the head structure 100 along the front end thereof, and in addition, the groove width a=0.26 mm of the chip groove 3 and the edge width c1=0.02 mm of the cutting edge 2 in the cross section of the head structure 100 along the front end thereof; i.e. the following functional relationship needs to be satisfied:
k is a correction coefficient of 0.6-1.3, and a is more than or equal to 0.1 mm.
The tool bit structure 100 satisfies the above functional relationship, and can not only improve the machining precision and the surface roughness of the machined surface of the workpiece, but also greatly improve the service life of the tool.
Illustratively, the value range of β in this embodiment is preferably 50 ° to 85 °.
Illustratively, in the present embodiment, the rotation direction of the cutting edge 2 is right-handed, and the cutting edge 24 is disposed on the right side of the cutting edge 2, as shown in fig. 7 and 8.
Preferably, the rake angle γ of the cutting edge 2 in this embodiment has a value in the range of 5 ° to 20 °.
In this embodiment, the relief angle α of the cutting edge 2 is preferably 0 ° to 10 °.
Example two
The present embodiment also provides a cutter, which differs from the first embodiment in that:
first, the cutting body 1 is not of the same size, wherein: the diameter of the front end face 11 of the cutting body 1 isThe diameter of the rear end face 12 of the cutting body 1 is +.>The number of cutting edges 2 is 55; in addition, the flute width a=0.23 mm of the chip flute 3 and the blade width c1=0.02 mm of the cutting edge 2 are seen along the front end cross section of the cutter head structure 100.
Example III
The cutter in this embodiment, which differs from the first embodiment, includes:
first, the cutting body 1 is not of the same size, wherein: the diameter of the front end face 11 of the cutting body 1 isThe diameter of the rear end face 12 of the cutting body 1 is +.>The number of cutting edges 2 is 36; in addition, the flute width a=0.33 mm of the chip flute 3 and the blade width c1=0.02 mm of the cutting edge 2 are seen along the front end cross section of the cutter head structure 100.
Example IV
As shown in fig. 9 to 11, the cutter in the present embodiment is different from the first embodiment in that:
firstly, the cutting edges 2 are arranged differently, specifically, some of the cutting edges 2 are: the rear end extends to the edge of the rear end face 12 of the cutting body 1, and the front end extends to the edge of the front end face 11 and defines it as a long cutting edge 22; the rest of the cutting edges 2 are: the rear end extends to the edge of the rear end face 12 of the cutting body 1, a space is left between the front end and the front end face 11, and the space is defined as a short cutting edge 232, and the long cutting edge 22 and the short cutting edge 23 are uniformly distributed along the circumferential direction, i.e. the long cutting edge and the short cutting edge are staggered.
Preferably, the long and short cutting edges are arranged at a distance from each other, and the flute width of the flutes 3 is gradually reduced from the outside to the inside as seen in the same radial direction of the cutting body 1, and when extending to the front end position of the segment cutting edge 2, the total width of the two adjacent flutes 3 is increased suddenly after merging, and then gradually reduced again.
According to the embodiment, through the arrangement of the long cutting edge and the short cutting edge, the groove width of the cutter head structure 100 along the radial direction of the cutter head structure and the number of the cutting edges 2 can be optimized, the chip removal capacity of the cutter head structure 100 near the small diameter position is ensured to meet the requirements, the cutting performance is ensured, and the machining precision, the surface roughness and the service life of a cutter of a machined workpiece are optimized.
Specifically, the sum of the numbers of the long cutting edges 22 and the short cutting edges 23 in the present embodiment is 70, that is, the numbers of the long cutting edges 22 and the short cutting edges 23 are 35; when the total number of the cutting edges 2 is large, the cutting edges 2 are arranged in the form of long cutting edges and short cutting edges, so that the cutting requirements can be ensured, and the chip containing and removing performances can be optimized.
Next, the dimensions of the cutting body 1 in this embodiment are different from those of the first embodiment, specifically, the cutting body 1 in this embodiment is: the diameter of the front end face 11 isThe diameter of the rear face 12 is +.>The axial length of the magnetic core is b=1.84 mm; the number of cutting edges 2 observed along the cross section of the front end of the cutter head structure 100 is equal to the total number of long cutting teeth 22, namely n=35, and the flute width a of the junk slots=0.21 mm, and the cutting edge margin c1=0.02 mm;
i.e. the cross-section of the cutter head structure along its front end can also fulfil the following functional relationship:
k is a correction coefficient of 0.6-1.3, and a is more than or equal to 0.1 mm.
Further, in order to avoid a line mark being left on the workpiece at a position near the front end at the time of machining, a chip breaker is not provided at a position where the front section of the long cutting edge 22 protrudes beyond the short cutting edge 23.
In addition, the short cutting edge 23 in the present embodiment includes only one type, and a plurality of types of short cutting edges 23 may be provided according to actual needs, and the extending positions of the tips of the respective types of short cutting edges 23 are different.
Example five
The cutter in this embodiment is similar to the fourth embodiment in that long and short cutting edges are alternately arranged, and both ends of the long cutting edge 22 extend to the front end face 11 and the rear end face 12 of the cutting body 1, respectively, the rear end of the short cutting edge 23 extends to the edge of the rear end face 12 of the cutting body 1, and a space is left between the front end and the edge of the front end face 11 of the cutting body 1, which is different from the fourth embodiment in that:
the total number of cutting edges 2 is 100, i.e. the number of long cutting edges 22 and the number of short cutting edges 23 are 50; based on this, the number of cutting edges 2 observed in the cross section along the front end of the head structure 100 is equal to the number of long cutting edges 22, i.e., n=50, and in addition, the groove width a=0.14 mm of the chip groove 3, the cutting width c1=0.02 mm of the cutting edge 2, as observed in the cross section along the front end of the head structure 100.
The test is carried out on the cutters in the specific embodiments, and the cutter is compared with the existing diamond grinding head cutter, and the specific reference is shown in the table 1; the result shows that the machining precision and the surface roughness of each cutter can be effectively improved, and the service life of the cutter is greatly prolonged.
| Cutter type | Machining precision/mm | Surface roughness/. Mu.m | Service life/time |
| Cutter in embodiment one | 0.01-0.02 | Ra0.2-0.4 | 1600 |
| Cutter in second embodiment | 0.01-0.02 | Ra0.35-0.45 | 950 |
| Cutter in embodiment three | 0.01-0.02 | Ra0.4-0.5 | 800 |
| Cutter in fourth embodiment | 0.01-0.02 | Ra0.2-0.4 | 800 |
| Cutter in fifth embodiment | 0.01-0.02 | Ra0.2-0.35 | 900 |
| Diamond grinding head cutter | 0.04 | Ra0.5-0.6 | 200 |
Table 1 test data for each tool
To sum up, cutter and tool bit structure in this application, each cutting edge circumference is the heliciform and locates on the outer peripheral face of cutting main part, through optimizing the number of cutting edge, the width of cutting edge and the groove width of junk slot of cutter front end cutting edge for when observing along the cross section of tool bit structure front end, can satisfy following functional relation:
wherein K is a correction coefficient with a value range of 0.6-1.3, and a is more than or equal to 0.1 mm;for cutting body the front end diameter is +.>For the rear end diameter of the cutting body +.>a is the groove width of the chip removal groove, c1 is the blade width of the cutting edge, and n is the number of the cutting edges; when the functional relation is met, the machining precision and the roughness of the machined surface of the workpiece can be effectively improved, and the service life of the cutter can be greatly prolonged.
The description makes reference to the accompanying drawings to disclose the present application, and also to enable any person skilled in the art to practice the present application, including making and using any devices or systems, using suitable materials and using any incorporated methods. The scope of the present application is defined by the claims and includes other examples that occur to those skilled in the art. Such other examples should be considered to be within the scope of protection as determined by the claimed subject matter, so long as such other examples include structural elements that are not literally different from the claimed subject matter, or include equivalent structural elements with insubstantial differences from the literal languages of the claimed subject matter.
Claims (18)
1. A cutter head structure, comprising: the cutting device comprises a cutting main body and a plurality of cutting edges arranged on the cutting main body, wherein the cutting main body comprises a front end face, a rear end face and an outer peripheral face, the front end face and the rear end face are oppositely arranged, the outer peripheral face is in a circular shape which is coaxially arranged, the outer peripheral face is in a concave or convex curved surface, the plurality of cutting edges are circumferentially arranged on the outer peripheral face at intervals by taking a central shaft of the cutting main body as a center, the cutting edges are spiral, and chip grooves are arranged between two adjacent cutting edges;
the diameter of the front end of the cutting main body isMillimeter, the rear end diameter of the cutting body is +.>Millimeter (mm)/(mm)>Observing the cross section of the cutter head structure along the front end of the cutter head structure, wherein the groove width of the chip removal groove is a millimeter, the blade width of the cutting edge is c1 millimeter, and the number of the cutting edges is n, wherein:
k is a correction coefficient with a value range of 0.6-1.3, and a is more than or equal to 0.1 mm.
2. The bit structure of claim 1, wherein any cross-section along the bit structure is sufficient to:
a＝0.1㎜～2㎜，
3. the cutter head structure according to claim 2, wherein the number of the cutting edges is 20 to 120.
4. The cutter head structure according to claim 1, wherein the cutting edge has a cutting width of 0.01 mm to 0.3 mm.
5. The cutter head structure according to claim 1, wherein the spiral direction of the cutting edge is left-handed or right-handed, and the included angle between the tangent line at the front end of the cutting edge and the tangent line at the rear end of the cutting edge is β, β=5° to 150 °.
6. The cutter head structure of claim 1, wherein each cutting edge is: the rear end extends to the edge of the rear end face, and the front end extends to the edge of the front end face; or alternatively, the process may be performed,
some of the cutting edges are long cutting edges, the rear ends of the cutting edges extend to the outer edge of the rear end face, the front ends of the cutting edges extend to the edge of the front end face, the rest of the cutting edges are short cutting edges, the rear ends of the cutting edges extend to the edge of the front end face, gaps are reserved between the front ends and the edge of the front end face, and the long cutting edges and the short cutting edges are uniformly distributed along the circumferential direction.
7. The tool bit structure of claim 1, wherein the rake angle of the cutting edge is-60 ° to 30 °, and the rake angles are not identical throughout the same direction of extension of the cutting edge.
8. The tool bit structure of claim 7, wherein the cutting edge is integrally formed on the cutting body.
9. The tool bit structure of claim 8, wherein the cutting edge is laser formed on the cutting body.
10. The tool bit structure of claim 1, wherein the cutting edge is provided with a plurality of chip breakers spaced apart from each other, the chip breakers being formed in and extending through a top surface of the cutting edge.
11. The tool bit structure of claim 10, wherein the chip breaker includes two oppositely disposed sidewalls intersecting at a bottom, each of the sidewalls being at an obtuse angle with respect to the top surface of the cutting edge.
12. The tool bit structure of claim 11, wherein the chip flutes have a flute depth h1, the chip breakers have a flute depth h2, and the chip breakers have a maximum width c2 along a radial direction of the cutting body, wherein: h2 = (0.1-0.9) ·h1, the included angle between each side wall and the top surface of the cutting edge is greater than 90 ° and less than 170 °.
13. The tool bit structure of claim 10, wherein the chip breakers on adjacent two of said cutting edges are offset.
14. The tool bit structure of claim 10, wherein a portion of the cutting edges are long cutting edges, the rear ends of the cutting edges extend to the outer edge of the rear end face, the front ends of the cutting edges extend to the edge of the front end face, the rest of the cutting edges are short cutting edges, the rear ends of the cutting edges extend to the edge of the front end face, a space is reserved between the front ends and the edge of the front end face, and the long cutting edges and the short cutting edges are uniformly distributed along the circumferential direction;
the front section of the long cutting edge protrudes from the position of the short cutting edge and is not provided with the chip breaking groove.
15. The cutter head structure of claim 1, wherein the relief angle of the cutting edge is 0 ° to 30 °.
16. The tool bit structure of claim 1, wherein the cutting body and the cutting edge are any one of chemical vapor deposited diamond, polycrystalline cubic boron nitride, ceramic, and cemented carbide.
17. The bit construction of any one of claims 1-16, further comprising a connecting portion provided at a rear end of the rear end face of the cutting body.
18. A tool, comprising:
a cutter bar; and
the tool bit structure of any one of claims 1-17, wherein a rear end of the tool bit structure is mounted to a front end of the tool bar.
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| CN202011128687.9A CN112355333B (en) | 2020-10-20 | 2020-10-20 | Cutter and cutter head structure thereof |
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|---|---|---|---|
| CN202011128687.9A CN112355333B (en) | 2020-10-20 | 2020-10-20 | Cutter and cutter head structure thereof |
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| CN112355333B true CN112355333B (en) | 2023-08-08 |
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| CN113333801A (en) * | 2021-05-21 | 2021-09-03 | 科益展智能装备有限公司 | Tool bit structure and cutter |
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| US4765782A (en) * | 1986-07-04 | 1988-08-23 | Alps Electric Co., Ltd. | Cutter |
| CN105307807A (en) * | 2013-06-26 | 2016-02-03 | 京瓷株式会社 | Drill |
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|---|---|
| CN112355333A (en) | 2021-02-12 |
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Effective date of registration: 20210219 Address after: 510663 Room 101, building a, 6 Nanyun 2nd Road, Huangpu District, Guangzhou City, Guangdong Province Applicant after: SMARTGUY INTELLIGENT EQUIPMENT Co.,Ltd. Applicant after: SMARTGUY INTELLIGENT EQUIPMENT Co.,Ltd. GUANGZHOU BRANCH Applicant after: CONPROFE TECHNOLOGY GROUP Co.,Ltd. Address before: 510663 Room 201, building 2, No. 6, Nanyun 2nd Road, Huangpu District, Guangzhou City, Guangdong Province Applicant before: SMARTGUY INTELLIGENT EQUIPMENT Co.,Ltd. GUANGZHOU BRANCH Applicant before: CONPROFE TECHNOLOGY GROUP Co.,Ltd. |
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