CN112355333A - Cutter and cutter head structure thereof - Google Patents
Cutter and cutter head structure thereof Download PDFInfo
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- CN112355333A CN112355333A CN202011128687.9A CN202011128687A CN112355333A CN 112355333 A CN112355333 A CN 112355333A CN 202011128687 A CN202011128687 A CN 202011128687A CN 112355333 A CN112355333 A CN 112355333A
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- cutting
- edge
- cutting edges
- cutter head
- head structure
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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
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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 face connected with the front end face and the rear end face, the plurality of cutting edges are circumferentially arranged on the outer peripheral face at intervals by taking a central shaft of the cutting body as a center, the cutting edges are spiral, a chip removal groove is arranged between every two adjacent cutting edges, and the diameter of the front end of the cutting body is
Mm, rear end diameter of the cutting body of
The length of each millimeter,
observing the cross section of the cutter head structure along the front end of the cutter head structure, the width of a flute of a millimeter, the width of a cutting edge of c1 millimeters and the width of the cutting edgeThe number is n, wherein:
k is a correction coefficient with the value range of 0.6-1.3, and a is more than or equal to 0.1 mm. The cutter can effectively improve the processing precision and the surface roughness of the processed 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 surface processing of a workpiece of a hard and brittle material, for example: glass, sapphire, graphite etc. material usually need use the bistrique cutter among the prior art, but current bistrique cutter has following problem: firstly, the good processing precision and roughness of the processed surface of the workpiece are difficult to ensure, so that the polishing time of the rear-stage process of the workpiece is influenced, and the batch production of products is not facilitated; in addition, the service life of the cutter is short.
Disclosure of Invention
An object of the application is to provide a tool bit structure, it can be through optimizing structure to when guaranteeing the processing demand, improve its self life. It is another object of the present application to provide a tool comprising the above-described insert configuration.
The purpose of the application is realized by the following technical scheme:
a tool bit structure, comprising: the cutting tool 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 surface and a rear end surface which are oppositely arranged and an outer peripheral surface which is connected with the front end surface and the rear end surface, the front end surface and the rear end surface are coaxially arranged in a circular shape, the outer peripheral surface is an inwards concave or outwards convex curved surface, the plurality of cutting edges are circumferentially arranged on the outer peripheral surface at intervals by taking a central shaft of the cutting main body as a center, the cutting edges are spiral, and a chip removal groove is formed between every two adjacent cutting edges;
the front end diameter of the cutting main body is
Mm, the diameter of the rear end of the cutting body is
The length of each millimeter,
observing the cross section of the cutter head structure along the front end of the cutter head structure, wherein the width of the flute of the chip groove is a millimeter, the width of the cutting edge is c1 millimeters, and the number of the cutting edges is n, wherein:
k is a correction coefficient with the 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 that:
a=0.1㎜~2㎜，4≤n＜π·
/a。
in some embodiments of the present application, the number of the cutting edges is 20 to 120.
In some embodiments of the present application, the cutting edge has a 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 of the front end of the cutting edge of the cutting tooth and a tangent line of the rear end of the cutting edge of the cutting tooth is β, β =5 ° -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; alternatively, the first and second electrodes may be,
among a plurality of cutting edges, 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 gap is reserved between the front ends of the cutting edges 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 ° -30 °, and the rake angle is not completely the same along the extension direction of the same 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, a plurality of chip breakers are spaced apart from each other on the cutting edge, and the chip breakers are opened 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 includes two side walls disposed oppositely and intersecting with each other at the bottom, and an included angle between each side wall and the top surface of the cutting edge is an obtuse angle.
In some embodiments of the present application, the flute depth of the flute is h1, the flute depth of the chip breaker is h2, the maximum width of the chip breaker in the radial direction of the cutting body 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 larger than 90 degrees and smaller than 170 degrees.
In some embodiments of the present application, the chip breakers on two adjacent cutting edges are staggered.
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 surface, the front ends of the cutting edges extend to the edge of the front end surface, the other cutting edges are short cutting edges, the rear ends of the cutting edges extend to the edge of the front end surface, a gap is left between the front ends and the edge of the front end surface, and the long cutting edges and the short cutting edges are uniformly distributed along the circumferential direction;
the chip breaker groove is not formed in the position, protruding out of the short cutting edge, of the front section of the long cutting edge.
In some embodiments of the present application, the cutting edge has a relief angle of 0 ° -30 °.
In some embodiments of the present disclosure, the cutting body and the cutting edge are made of any one of polycrystalline diamond, single crystal diamond, chemical vapor deposition diamond, polycrystalline cubic boron nitride, ceramic, and cemented carbide.
In some embodiments, the cutting insert further comprises a connecting portion disposed at a rear end of the rear end face of the cutting body.
A tool, characterized in that it comprises:
a cutter bar; and
a cutter head formation as claimed in any one of the preceding claims, the rear end of the cutter head formation being mounted to the forward end of the cutter 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 the heliciform and locate on cutting subject's the outer peripheral face, through the sword number, the sword width of optimizing cutter front end cutting edge and the groove 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 the value range of 0.6-1.3, and a is more than or equal to 0.1 mm;
the diameter of the front end of the cutting body is,
in order to cut the diameter of the rear end of the body,
a is the groove width of the chip groove, c1 is the edge width of the cutting edge, and n is the number of the cutting edges; when the functional relation is satisfied, 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 connection with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the described objects and may contain exaggerated displays and 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 a bit structure 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 view of part A of FIG. 4;
fig. 6 is a partially enlarged schematic view of part B of fig. 5;
FIG. 7 is a schematic cross-sectional view taken along the forward end thereof in FIG. 2;
FIG. 8 is an enlarged view of a portion of FIG. 7 with respect to one of the cutting edges;
FIG. 9 is a schematic view of a head structure of a tool in accordance with a fourth embodiment of the present application;
fig. 10 is a partially enlarged schematic view of part C of fig. 9;
fig. 11 is a left side view of fig. 10.
In the figure, 100, the tool tip configuration; 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 groove; 211. a side wall; 22. a long cutting edge; 23. a short cutting edge; 24. cutting edges; 3. a chip groove; 4. a connecting portion;
200. a cutter bar;
a-the flute width of the flute; h 1-groove depth of the chip groove; -the rake angle of the gamma-cutting edge; a relief angle of the alpha-cutting edge; c 1-edge width of 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 when viewed from 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
Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the descriptions are illustrative only, exemplary, and should not be construed as limiting the scope of the application.
First, it should be noted that the orientations of top, bottom, upward, downward, and the like referred to herein are defined with respect to the orientation in the respective drawings, are relative concepts, and thus can be changed according to different positions and different practical states in which they are located. These and other orientations, therefore, should not be used in a limiting sense.
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 be further noted that any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the figures, can still be combined between these technical features (or their equivalents) to obtain other embodiments of the present application not directly mentioned herein.
It will be further understood that the terms "first," "second," and the like, are used herein to describe various information and should not be limited to these terms, which are used merely 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 application.
It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.
In addition, when a workpiece is machined by the tool in 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 in the application is mainly used for rounding workpieces made of materials such as glass.
As shown in fig. 1-11, a tool is provided herein, comprising: a cutter bar 200 and a cutter head structure 100 arranged at the front end of the cutter bar 200.
Specifically, as shown in fig. 2-3, the tool tip configuration 100 includes: cutting subject 1 and a plurality of integrated into one piece cutting edge 2 on cutting subject 1, cutting subject 1 is including setting up preceding terminal surface 11 and rear end 12 relatively, and connect the outer peripheral face 13 of preceding terminal surface 11 and rear end 12, preceding terminal surface 11 and rear end 12 are the circular of coaxial setting, outer peripheral face 13 is the curved surface, a plurality of cutting edge 2 use the center pin of cutting subject 1 to locate on outer peripheral face 13 as center circumference interval, cutting edge 2 is the heliciform, be equipped with chip groove 3 between two adjacent cutting edge 2.
The outer peripheral surface 13 of the cutting body 1 in the present application may be an inwardly concave curved surface or an outwardly convex curved surface, which is determined specifically according to the form of a chamfer required in a machined workpiece.
It should be noted that the structural dimensions of the cutting body 1 are generally selected according to the desired surface profile to be machined, wherein the diameter of the front end face 11 of the cutting body 1 is such that
The rear end face 12 has a diameter of
And is and
。
typically, the specific dimensional ranges of the cutting body are: diameter of the front end face 11 of the cutting body 1
The numeric area of the cutting edge is 1 mm to 10 mm, and the diameter of the rear end surface 12 of the cutting main body 1 is set to be smaller than the numeric area of the cutting edge
The range of the axial length b of the cutting main body 1 is 3 mm to 25 mm, and the range of the axial length b of the cutting main body 1 is 1 mm to 8 mm.
In order to enable the tool to satisfy 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 is required to be satisfied by observing the cross section of the tool bit structure 100 along the front end thereof:
k is a correction coefficient with the value range of 0.6-1.3, and a is more than or equal to 0.1 mm;
wherein: a is the flute width of the flute 3, c1 is the edge width of the cutting edge 2, a and c1 are both in millimeters, and n is the number of cutting edges 2.
Further, in this embodiment, observing any cross section of the tool bit structure 100, the groove width of the chip groove 3 is a =0.1 mm-2 mm, and n is greater than or equal to 4 and less than 2 pi · s
A; the number of the cutting edges 2 at each position in the radial direction of the cutting body 1 is optimized, and the groove width of each chip groove 3 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 performance can be ensured simultaneously, so that the machining precision is further improved, and the service life of the cutter is effectively prolonged.
Typically, the number of the cutting edges is 20-120; not only can the cutting performance be ensured, but also the cutting service life of the cutter can be ensured.
In addition, in order to ensure the strength and wear resistance of the cutting edge 2 and simultaneously ensure the chip-containing performance, in the embodiment, the groove depth h1=0.05 mm-0.5 mm of the chip discharge groove 3 and the edge width c1=0.01 mm-0.3 mm of the cutting edge 2 are shown in fig. 8.
Observed along the plan view of tool bit structure, the value range of contained angle beta between the tangent line of cutting edge 24 front and back both ends department of cutting edge 2 sets up 5 ~150 usually in this application, specifically refer to as shown in figure 4, can effectively reduce cutting resistance when guaranteeing processingquality.
And the cutting edge 2 may be left-handed or right-handed, and the cutting edge 24 may be distributed on the left or right side of the cutting edge 2, i.e. there may be several forms: dextrorotation cutting edge 2, blade 24 locate the right side of cutting edge 2, and dextrorotation cutting edge 2, blade 24 locate the left side, and levogyration cutting edge 2, blade 24 locate the right side, perhaps levogyration cutting edge 2, blade 24 locate the left side.
In the present application, in order to improve the cutting efficiency while ensuring the cutting effect, the rake angle of the cutting edge 2 is γ, γ = -60 ° -30 °, specifically referring to fig. 3; wherein the rake angle γ is the angle between the rake face and the base measured in the orthogonal plane; in addition, in the present embodiment, the rake angles γ at various positions are not completely the same along the extending direction of the cutting edge 2, and the forces applied at various positions along the extending direction of the cutting edge 2 are different during the process of processing the workpiece by the tool, so that the rake angles γ at various positions of the cutting edge 2 are adapted to the forces applied at various positions, and thus the forces can be dispersed, and the anti-vibration performance of the tool can be effectively improved.
Preferably, the rake angle γ of the cutting edge 2 in the present embodiment ranges from 5 ° to 20 °.
In the present application, the relief angle α of the cutting edge 2 is 0 ° to 30 °, specifically referring to fig. 3, the relief angle α is an included angle between the flank face and the cutting face measured in the orthogonal plane; as the clearance angle α increases, the cutting resistance can be reduced, but at the same time, the strength of the cutting edge 2 may be reduced, and the performance of the tool can be further optimized by appropriately setting the clearance angle α of the cutting edge 2 in the present embodiment.
Preferably, the relief angle α of the cutting edge 2 in the present application is 0 ° -15 °. The method specifically comprises the following steps: 0 °, 5 °, 10 °.
In this way, in order to facilitate the flexible arrangement of the number of cutting edges 2 in the cutting body 1 and to facilitate the machining of rake angles which are not identical at each location, the cutting edges 2 are integrally formed with the cutting body 1.
In this embodiment, in order to ensure the machining accuracy of the tool itself and 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 machined into different rake angles along the extending direction thereof according to actual needs by laser forming.
Further, in the present embodiment, in order to prevent the chips from being entangled around the tool to affect the machining accuracy of the workpiece and to reduce the cutting resistance, a plurality of chip breakers 21 are spaced apart from each other on the cutting edge 2, and the chip breakers 21 are opened 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 side walls 211 which are oppositely arranged and have intersecting bottoms, and both included angles between the side walls 211 and the top surface of the cutting edge 2 are obtuse angles, that is, the side walls are integrally "V" shaped, so that by avoiding that two sides of the chip breaker 21 are perpendicular to the top surface or form acute angles with the top surface, it can be ensured that the wear resistance of two sides of the chip breaker 21 is kept the same, and the generation of line marks on the processed workpiece in the processing 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, and in particular, the edge width c1 is the width of the top surface of the cutting edge 2 measured in the orthogonal plane, and as shown with continued reference 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, an included angle between each side wall and the top surface of the cutting edge is larger than 90 degrees and smaller than 170 degrees, chip removal performance can be further improved by optimally designing the size of the chip breaker 21, and the chip breaker 21 is ensured not to generate line marks on a machined workpiece.
Further, in order to facilitate the smooth chip discharge and avoid the occurrence of line marks on the machined surface of the machined workpiece, the chip breakers 21 on two adjacent cutting edges 2 are arranged in a staggered manner, as shown in fig. 5.
In addition, the material of the cutting tip structure 100 in the present application is any one of polycrystalline diamond, single crystal 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 of the above material; the cutter has high hardness and good wear resistance, and can effectively improve the processing precision and the processing efficiency.
As shown in fig. 2, the cutting tip structure 100 of the present application further includes a connecting portion 4, the connecting portion 4 is provided at the rear end of the rear end surface 12 of the cutting body 1, and the cutting tip structure 100 is attached to the front end of the holder 200 via the connecting portion 4.
Several specific embodiments of the tool in the present application are listed below:
example one
As shown in fig. 1 to 8, in the tool of the present embodiment, in the tool head structure 100, the rear end of each cutting edge 2 extends to the edge of the rear end surface 12 of the cutting body 1, and the front end of each cutting edge 2 extends to the edge of the front end surface 11 of the cutting body 1; at this time, the flute width of each flute 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 is
=5 mm, and the diameter of the rear end surface 12 of the cutter body 1 is
=15 mm, the axial length of the cutter body 1 is b =1.66 mm, the number of cutting edges is 60, each cutting edge extends to the edge of the front end face 11 of the cutter body 1, so that the number of edges n =60 in a cross section of the tool tip structure 100 along the front end thereof, and further, 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 a cross section of the tool tip structure 100 along the front end thereof; i.e. the following functional relationships need to be satisfied:
and 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 functional relationship, and can improve the machining precision and the surface roughness of the machined surface of the workpiece, and can greatly prolong the service life of the tool.
Illustratively, the value range of β in this embodiment is preferably 50 ° -85 °.
For example, as shown in fig. 2, 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 the present embodiment ranges from 5 ° to 20 °.
In the present embodiment, the relief angle α of the cutting edge 2 is preferably 0 ° to 10 °.
Example two
The present embodiment also provides a tool, which differs from the first embodiment in that:
first, the dimensions of the cutting bodies 1 are not the same, wherein: the diameter of the front end face 11 of the cutting body 1 is
=4.5 mm, and the diameter of the rear end surface 12 of the cutter body 1 is
=14.5 mm, the number of cutting edges 2 is 55; further, as viewed in a cross section of the tip end of the tool tip structure 100, the flute width a =0.23 mm of the flute 3 and the edge width c1=0.02 mm of the cutting edge 2 are set.
EXAMPLE III
The difference between the cutter in the present embodiment and the first embodiment includes:
first, the dimensions of the cutting bodies 1 are not the same, wherein: the diameter of the front end face 11 of the cutting body 1 is
=4 mm, the diameter of the rear end face 12 of the cutter body 1 is
=14 mm, the number of cutting edges 2 is 36; further, as viewed in a cross section of the tip end of the tool tip structure 100, the flute width a =0.33 mm of the flute 3 and the edge width c1=0.02 mm of the cutting edge 2 are set.
Example four
As shown in fig. 9-11, the difference between the tool of the present embodiment and the first embodiment is:
firstly, the cutting edges 2 are arranged differently, specifically, in a plurality of cutting edges 2, a part of the cutting edges is: the rear end extends to the edge of the rear end face 12 of the cutting body 1, the front end extends to the edge of the front end face 11, and is defined as a long cutting edge 22; the remaining cutting edges 2 are: the rear end extends to the edge of the rear end surface 12 of the cutting body 1, a gap is left between the front end and the front end surface 11, and the gap is defined as a short cutting edge 232, and the long cutting edges 22 and the short cutting edges 23 are uniformly distributed along the circumferential direction, namely the whole body is distributed in a staggered manner.
Preferably, the long and short cutting edges are arranged at intervals one by one, and as viewed in the same radial direction of the cutting body 1, as shown in fig. 10, the flute widths of the flutes 3 gradually decrease from the outside to the inside, and when extending to the front end position of the segment cutting edge 2, the total width of two adjacent flutes 3 is increased after being merged, and then gradually decreases.
This embodiment is through setting up the form of long, short cutting edge, can optimize along its radial everywhere groove width and the quantity of cutting edge 2 of tool bit structure 100, ensures that the chip removal ability that tool bit structure 100 is close to path department satisfies the demand to guarantee cutting performance simultaneously, finally realize optimizing the machining precision, the roughness of surface and the life of cutter of processing the work piece.
Specifically, the total number of the long cutting edges 22 and the short cutting edges 23 in the present embodiment is 70, that is, the number of the long cutting edges 22 and the short cutting edges 23 is 35; when the total number of the cutting edges 2 is large, the cutting edges 2 are arranged in a long and short cutting edge mode, so that the cutting requirements can be guaranteed, and the chip accommodating and removing performance can be optimized.
Next, the size of the cutting body 1 in this embodiment is different from that in the first embodiment, specifically, the cutting body 1 in this embodiment is: the diameter of the front end face 11 is
=2.57 mm, and the diameter of the rear end face 12 thereof is
=13 mm, with an axial length b =1.84 mm; the number of cutting edges 2, viewed in cross-section along the front end of the head structure 100, is equal to the number of long cutsThe total number of teeth 22, i.e., n =35, and the flute width a =0.21 mm of the flute, the edge width c1=0.02 mm of the cutting edge;
i.e. the cross-section of the cutter head structure along its front end can also satisfy the following functional relationship:
and 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 the wire mark on the workpiece at a position near the tip end during machining, the chip breaker is not provided at a position where the front section of the long cutting edge 22 protrudes from the short cutting edge 23.
It should be noted that the short cutting edges 23 in the present embodiment include 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 front ends of the short cutting edges 23 of the respective types are different.
EXAMPLE five
The cutter in this embodiment is similar to the fourth embodiment, and long and short cutting edges are also arranged in a staggered manner, two ends of the long cutting edge 22 extend to the front end surface 11 and the rear end surface 12 of the cutting body 1 respectively, the rear end of the short cutting edge 23 extends to the edge of the rear end surface 12 of the cutting body 1, and a gap is left between the front end and the edge of the front end surface 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 both 50; based on this, the number of cutting edges 2 as viewed in a cross section along the front end of the tool tip structure 100 is equal to the number of long cutting edges 22, i.e., n =50, and further, the flute width a =0.14 mm of the flute 3 and the edge width c1=0.02 mm of the cutting edge 2 as viewed in a cross section along the front end of the tool tip structure 100.
The tool in each specific embodiment is subjected to test testing and compared with the existing diamond grinding head tool, and the specific reference is shown in table 1; the result shows that the processing precision and the surface roughness of each cutter can be effectively improved, and the service life of the cutter is greatly prolonged.
TABLE 1 test data for each tool
In summary, in the tool and the tool bit structure thereof in the present application, each cutting edge is spirally disposed on the outer peripheral surface of the cutting body in the circumferential direction, and the following functional relationship can be satisfied when observing the cross section along the front end of the tool bit structure by optimizing the number of cutting edges, the edge width and the groove width of the chip groove of the cutting edge at the front end of the tool:
wherein K is a correction coefficient with the value range of 0.6-1.3, and a is more than or equal to 0.1 mm;
the diameter of the front end of the cutting body is,
in order to cut the diameter of the rear end of the body,
a is the groove width of the chip groove, c1 is the edge width of the cutting edge, and n is the number of the cutting edges; when the functional relation is satisfied, 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.
This written description discloses the application with reference to the drawings, and also enables one skilled in the art to practice the 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 are to be considered within the scope of the claims as long as they include structural elements that do not differ from the literal language of the claims, or that they include equivalent structural elements with insubstantial differences from the literal language of the claims.
Claims (18)
1. A cutter head structure, comprising: the cutting tool 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 surface and a rear end surface which are oppositely arranged and an outer peripheral surface which is connected with the front end surface and the rear end surface, the front end surface and the rear end surface are coaxially arranged in a circular shape, the outer peripheral surface is an inwards concave or outwards convex curved surface, the plurality of cutting edges are circumferentially arranged on the outer peripheral surface at intervals by taking a central shaft of the cutting main body as a center, the cutting edges are spiral, and a chip removal groove is formed between every two adjacent cutting edges;
the front end diameter of the cutting main body is
Mm, the diameter of the rear end of the cutting body is
The length of each millimeter,
observing the cross section of the cutter head structure along the front end of the cutter head structure, wherein the width of the flute of the chip groove is a millimeter, the width of the cutting edge is c1 millimeters, and the number of the cutting edges is n, wherein:
k is a correction coefficient with the value range of 0.6-1.3, and a is more than or equal to 0.1 mm.
2. The cutter head structure of claim 1 wherein, along any cross-section of the cutter head structure, it is sufficient that:
a=0.1㎜~2㎜，4≤n＜π·
/a。
3. the cutter head structure of claim 2 wherein the number of cutting edges is 20 to 120.
4. The tool tip structure according to claim 1, wherein the cutting edge has a 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 of the cutting edge front end of the cutting tooth and the tangent line of the cutting edge rear end thereof is β, β =5 ° -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; alternatively, the first and second electrodes may be,
among a plurality of cutting edges, 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 gap is reserved between the front ends of the cutting edges 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 cutter head structure of claim 1, wherein the rake angle of said cutting edge is-60 ° -30 °, and said rake angle is not identical everywhere along the same extension direction of said cutting edge.
8. The cutter head structure of claim 7 wherein said cutting edge is integrally formed on said cutting body.
9. The cutter head structure of claim 8 wherein said cutting edge is laser formed on said cutting body.
10. The cutter head structure of claim 1 wherein said cutting edge is provided with a plurality of chip breakers spaced apart from each other and opening through the top surface of said cutting edge on either side thereof.
11. The cutter head structure of claim 10 wherein said chip breaker includes two oppositely disposed side walls intersecting at a base, each of said side walls being at an obtuse angle to said top surface of said cutting edge.
12. The tool bit structure of claim 11, wherein the flute depth of the flute is h1, the flute depth of the chip breaker is h2, and the maximum width of the chip breaker in the radial direction of the cutting body is c2, wherein: h2= (0.1-0.9) · h1, and the included angle between each side wall and the top surface of the cutting edge is larger than 90 degrees and smaller than 170 degrees.
13. The cutter head structure of claim 10 wherein the chip breakers on adjacent cutting edges are staggered.
14. The cutter head structure according to claim 10, wherein a part of the plurality of cutting edges are long cutting edges, the rear ends of the long cutting edges extend to the outer edge of the rear end surface, the front ends of the long cutting edges extend to the edge of the front end surface, the rest of the plurality of cutting edges are short cutting edges, the rear ends of the short cutting edges extend to the edge of the front end surface, a gap is reserved between the front ends and the edge of the front end surface, and the long cutting edges and the short cutting edges are uniformly distributed along the circumferential direction;
the chip breaker groove is not formed in the position, protruding out of the short cutting edge, of the front section of the long cutting edge.
15. The cutter head structure of claim 1 wherein the relief angle of the cutting edge is 0 ° -30 °.
16. The cutter head structure according to claim 1, wherein the material of the cutting body and the cutting edge is any one of polycrystalline diamond, single crystal diamond, chemical vapor deposition diamond, polycrystalline cubic boron nitride, ceramic, and cemented carbide.
17. The cutter head structure of any one of claims 1 to 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
a cutter head structure as claimed in any one of claims 1 to 17, the rear end of the cutter head structure being mounted to the front end of the cutter bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011128687.9A CN112355333B (en) | 2020-10-20 | 2020-10-20 | Cutter and cutter head structure thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011128687.9A CN112355333B (en) | 2020-10-20 | 2020-10-20 | Cutter and cutter head structure thereof |
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| CN112355333A true CN112355333A (en) | 2021-02-12 |
| CN112355333B CN112355333B (en) | 2023-08-08 |
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| CN202011128687.9A Active CN112355333B (en) | 2020-10-20 | 2020-10-20 | Cutter and cutter head structure thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN113333801A (en) * | 2021-05-21 | 2021-09-03 | 科益展智能装备有限公司 | Tool bit structure and cutter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112355333B (en) | 2023-08-08 |
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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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