CN115070518B - Ball head micro milling cutter with array micro tooth structure and preparation method thereof - Google Patents
Ball head micro milling cutter with array micro tooth structure and preparation method thereof Download PDFInfo
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- CN115070518B CN115070518B CN202210804964.6A CN202210804964A CN115070518B CN 115070518 B CN115070518 B CN 115070518B CN 202210804964 A CN202210804964 A CN 202210804964A CN 115070518 B CN115070518 B CN 115070518B
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- 238000003801 milling Methods 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 238000000227 grinding Methods 0.000 claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims abstract description 25
- 229910003460 diamond Inorganic materials 0.000 claims description 8
- 239000010432 diamond Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract 2
- 238000003754 machining Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
- B24B3/02—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of milling cutters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/02—Milling-cutters characterised by the shape of the cutter
- B23C5/10—Shank-type cutters, i.e. with an integral shaft
- B23C5/1009—Ball nose end mills
- B23C5/1018—Ball nose end mills with permanently fixed cutting inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The invention discloses a ball head micro-milling cutter with an array micro-tooth structure and a preparation method thereof, wherein the ball head micro-milling cutter mainly comprises a cutter handle, a cutter neck and a cutter head, wherein two axisymmetrically arranged spiral chip grooves are arranged on the cutter head, and an array micro-tooth structure formed by dispersing the two spiral chip grooves is formed, and the array micro-tooth structure is formed by symmetrically staggering a plurality of right-handed spherical spiral micro-grooves and left-handed spherical spiral micro-grooves. The cutting tool has the advantages that the contact area between the tool and the surface of a workpiece is obviously reduced, and the cutting force and the cutting heat are reduced, so that the service life of the tool is prolonged, the chip containing space of the tool can be increased, and the chip removing capacity of the tool is enhanced. During preparation, the initial contour of the milling cutter blank is firstly processed, then the ball head is precisely sharpened, the left-handed and right-handed symmetrical staggered spherical spiral micro-grooves are processed to form an array micro-tooth structure, and finally the two axisymmetric spiral chip grooves are ground through the forming grinding wheel, so that the service life of the cutter is prolonged, and the quality of the processed surface is improved.
Description
Technical Field
The invention relates to the preparation of cutting tools, in particular to a ball head micro-milling cutter with an array micro-tooth structure and a preparation method thereof.
Background
With the rise and development of micro devices, micro cutting technology becomes a research hot spot, however, compared with macro cutting, the cutting depth of each tooth and the radius of the circular arc of the cutting edge of a cutter in the micro milling process are in the same order of magnitude, so that obvious size effect exists in the process, the effects of extrusion, plowing, scratching and the like are obvious, and serious damage is caused to the surface integrity of a workpiece. In actual micro milling, the appearance of the machined surface of the workpiece is difficult to ensure due to various structures and tiny sizes of the workpiece, and serious machining defects such as burrs, edge breakage and the like are easy to occur. Especially when processing micro-cavity structure, because the chip space is limited, a large amount of cuttings are not discharged, and are repeatedly extruded by the cutter and adhered to the inner side of the micro-channel, a large amount of burrs are formed on the wall surface of the cavity, and the quality of the processed surface is seriously affected. Especially, when the ball head micro-milling cutter is used for processing circular, semicircular and other microstructures, the chip discharge is severely limited due to the limitation of the cutter neck of the micro-milling cutter, so that the quality deviation of the microstructure processing surface is caused. In addition, most of the conventional ball head micro milling cutters are of a single-edge or double-edge structure, so that the machining efficiency is low, the cutter abrasion is quick, the service life is short, and the requirements of high-precision and high-efficiency machining are difficult to meet.
Disclosure of Invention
The invention aims to provide a ball head micro milling cutter with an array micro tooth structure and a preparation method thereof, which can prolong the service life of a cutter and improve the quality of a processing surface.
The aim of the invention is achieved by the following technical scheme:
the ball head micro milling cutter with the array micro tooth structure comprises a cutter handle, wherein the diameter of the cutter handle is 2-4 mm, a cutter neck is fixedly connected to the end part of the cutter handle, a cutter head is fixedly connected to the cutter neck, the diameter of the cutter head is 0.6-1.0 mm, two axisymmetrically arranged spiral chip grooves are arranged on the cutter head, and the array micro tooth structure formed by dispersing the two spiral chip grooves is formed by symmetrically staggering a plurality of right-handed spherical spiral micro grooves and left-handed spherical spiral micro grooves;
the tracks of the right-handed spherical spiral micro-grooves and the left-handed spherical spiral micro-grooves are symmetrically staggered right-handed spherical spiral lines and left-handed spherical spiral lines, and the spherical centers of the right-handed spherical spiral lines and the left-handed spherical spiral lines are the same as the spherical center of the cutter head;
the left-handed spherical helical line axis and the right-handed spherical helical line axis are in the same plane with the cutter axis and are symmetrical with respect to the cutter axis, and the angle between the left-handed spherical helical line axis and the right-handed spherical helical line axis and the cutter axis is 20-40 degrees;
the sections of the right-handed spherical spiral micro-groove and the left-handed spherical spiral micro-groove are isosceles triangles, the length of the bottom side of the right-handed spherical spiral micro-groove is 30-200 mu m, and the height of the right-handed spherical spiral micro-groove is 10-100 mu m;
the micro-tooth structure is diamond, the long diagonal line is 20-70 mu m, the short diagonal line is 10-40 mu m, and the acute angle is 30-80 DEG;
the whole length of the milling cutter is 40mm to 50mm, and the helix angle of the spiral chip groove is 25 DEG to 40 deg.
A preparation method of a ball head micro-milling cutter with an array micro-tooth structure comprises the following steps:
step one: grinding the blank bar of the cutter by a precision cutter sharpening machine tool through a grinding wheel to form a preliminary profile of the milling cutter;
step two: carrying out precise sharpening on the cutter head by adopting a diamond grinding wheel, and further forming a plurality of right-handed spherical spiral micro-grooves and left-handed spherical spiral micro-grooves on the cutter head to form an array micro-tooth structure; the grinding speed is 15m/s to 30m/s, the feeding speed is 0.25mm/s to 0.50mm/s, and the grinding depth is 10 mu m to 30 mu m;
step three: grinding two axisymmetric spiral chip grooves by using a forming grinding wheel to form a ball head micro-milling cutter with an array micro-tooth structure; the grinding speed is 20m/s to 40m/s, the feeding speed is 0.40mm/s to 0.80mm/s, and the grinding depth is 50 mu m to 100 mu m.
The invention has the following beneficial effects:
1) The spiral micro grooves on the surface of the ball head micro milling cutter head with the array micro tooth structure scatter the complete surface into the array micro tooth structure, so that the contact area between a cutter and the surface of a workpiece can be effectively reduced, the cutting force and the cutting temperature are reduced, and the cutter wear is effectively avoided;
2) The ball head micro milling cutter with the array micro tooth structure is provided with a large number of micro cutting edges, has the functions of chip breaking and chipping, and inhibits the formation of burrs; when the array micro-tooth structure rotates for cutting, the micro-tooth structures on the array micro-tooth structure are in contact with the cutting surface alternately, and burrs on the cutting surface are removed; meanwhile, the right-handed spherical spiral micro-groove and the left-handed spherical spiral micro-groove on the surface of the cutter head can contain scraps, so that scraps and scraps removal capacity of the cutter are enhanced, and the quality of a machined surface is improved.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic view of a ball nose micro-milling cutter having an array micro-tooth structure according to the present invention;
FIG. 2 is a schematic view of a tool tip construction of the present invention;
FIG. 3 is a schematic view of the shape of the micro-tooth structure of the present invention;
FIG. 4 is a schematic cross-sectional shape of a tool tip surface micro-groove of the present invention;
fig. 5 is a schematic view of the grinding process of the ball nose micro-milling cutter with the array micro-tooth structure.
In the figure: a knife handle 1; a knife neck 2; a cutter head 3; a left-handed spherical helical axis 31; a helical junk slot 32; a right-handed spherical helical axis 33; an array of micro-tooth structures 34; right-handed spherical helical micro-grooves 35; left-handed spherical helical micro-groove 36; a tool axis 4; a diamond grinding wheel 5; and forming a grinding wheel 6.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, 3 and 4, wherein α is the angle between the spherical spiral and the axis of the tool; beta is an acute angle of the projection shape of the array micro-tooth structure; x is a long diagonal line of the projection shape of the array micro-tooth structure; y is a short diagonal line of the projection shape of the array micro-tooth structure; l is the bottom edge length of the right-handed spherical spiral micro-groove 35 and the left-handed spherical spiral micro-groove 36; h is the height of the right-handed and left-handed spherical helical micro-grooves 35, 36;
the structure of a ball head micro milling cutter with an array micro tooth structure is described in detail below;
the ball head micro milling cutter with the array micro tooth structure comprises a cutter handle 1, wherein the diameter of the cutter handle 1 is 2mm to 4mm, a cutter neck is fixedly connected to the end part of the cutter handle, and a cutter neck 2 is fixedly connected to the end part of the cutter handle 1, a cutter head 3 is fixedly connected to the cutter neck 2, the diameter of the cutter head is 0.6mm to 1.0mm, two axisymmetrically arranged spiral chip grooves 32 are arranged on the cutter head 3, and an array micro tooth structure 34 formed by dispersing the two spiral chip grooves 32 is arranged on the cutter head 3, and the array micro tooth structure 34 is formed by symmetrically staggering a plurality of right-handed spherical spiral micro grooves 35 and left-handed spherical spiral micro grooves 36;
the spiral micro grooves 32 on the surface of the cutter head 3 disperse the whole surface of the cutter head 3 into an array micro tooth structure, so that the contact area between the milling cutter and the surface of a workpiece can be reduced, the cutting force and the cutting temperature are reduced, and the abrasion of the milling cutter is effectively avoided;
the tracks of the right-handed spherical spiral micro-groove 35 and the left-handed spherical spiral micro-groove 36 are symmetrical and staggered right-handed spherical spiral lines and left-handed spherical spiral lines, and the spherical centers of the right-handed spherical spiral lines and the left-handed spherical spiral lines are the same as the spherical center of the cutter head 3; the left-handed spherical helical axis 31 and the right-handed spherical helical axis 33 are in the same plane as the tool axis 4 and are symmetrical about the tool axis 4, the angle between the left-handed spherical helical axis 31 and the right-handed spherical helical axis 33 and the tool axis 4 being 20 ° to 40 °;
the array micro-tooth structure ball head micro-milling cutter is provided with a large number of micro cutting edges, has the effects of chip breaking and chipping, inhibits burrs from forming, and when the array micro-tooth structure ball head micro-milling cutter is used for cutting, the array micro-tooth structure 34 rotates, the micro-tooth structure on the array micro-tooth structure is continuously intermittently contacted with a cutting surface, and a plurality of micro-tooth structures are alternately contacted with the cutting surface to generate intermittent impact force so as to remove the machined burrs;
meanwhile, the right-handed spherical spiral micro-groove 35 and the left-handed spherical spiral micro-groove 36 on the surface of the tool bit 3 can contain scraps, so that the chip removal capacity of the tool is enhanced, and the quality of a machined surface is improved;
as shown in FIG. 2, the right-handed and left-handed spherical helical micro-grooves 35 and 36 are preferably isosceles triangles in cross section with a base length of 30 μm to 200 μm and a height of 10 μm to 100. Mu.m;
as shown in FIG. 2, the micro-tooth structure is preferably diamond-shaped with a long diagonal of 20 μm-70 μm and a short diagonal of 10 μm to 40 μm and an acute angle of 30 DEG to 80 DEG;
the overall length of the milling cutter is 40mm to 50mm, and the helix angle of the helical flute 32 is 25 DEG to 40 deg.
The steps and functions of a ball head micro-milling cutter with an array micro-tooth structure are described in detail below;
a preparation method of a ball head micro-milling cutter with an array micro-tooth structure comprises the following steps:
step one: grinding the blank bar of the cutter by a precision cutter sharpening machine tool through a grinding wheel to obtain the primary profile of the micro-milling cutter of the ball head;
step two: grinding the surface of the tool bit 3 by adopting a diamond grinding wheel 5, wherein the sphere center of the track of the left-handed spherical spiral micro-groove 36 is the same as that of the tool bit, and the included angle alpha=30 DEG between the axis 31 of the tool and the axis 4 of the tool;
the diamond wheel 5 follows the equation in spherical coordinates: rho=0.5, theta=t=180, phi=t×360×10 motion, wherein rho is the distance from the point to the origin, theta is the angle between the point and origin connecting line and the X axis, phi is the angle between the projection of the point and origin connecting line on the X-Y plane and the X axis, t is a parameter, the grinding speed is 20m/s, the feeding speed is 0.35mm/s, the grinding depth is 10 μm, and finally the left-handed spherical spiral micro groove 36 is obtained;
step three: rotating the angle of the cutter, adopting the same processing parameters, and grinding the surface of the cutter head 3 through the diamond grinding wheel 5 to form a right-handed spherical spiral groove 35 which is symmetrical to the left-handed spherical spiral groove, thereby finally obtaining an array micro-tooth structure;
step four: two axisymmetric spiral chip grooves 32 are ground through the forming grinding wheel 6, the grinding speed is 30m/s, the feeding speed is 0.50mm/s, and the grinding depth is 60 mu m, so that the ball head micro-milling cutter with the array micro-tooth structure is manufactured.
The foregoing is merely a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, but can be modified in an insubstantial manner by using the above concept.
Claims (4)
1. A preparation method of a ball head micro-milling cutter with an array micro-tooth structure is characterized by comprising the following steps: the ball head micro milling cutter comprises a cutter handle (1) and a cutter neck (2) fixedly connected to the end part of the cutter handle (1), a cutter head (3) is fixedly connected to the cutter neck (2), two axisymmetrically arranged spiral chip grooves (32) are arranged on the cutter head (3), and an array micro-tooth structure (34) formed by dispersing the two spiral chip grooves (32), wherein the array micro-tooth structure (34) is formed by symmetrically staggering a plurality of right-handed spherical spiral micro-grooves (35) and left-handed spherical spiral micro-grooves (36);
when the array micro-tooth structure (34) rotates for cutting, the micro-tooth structures on the array micro-tooth structure are in contact with the cutting surface alternately, and burrs on the cutting surface are removed;
the array micro-tooth structure (34) ball head micro-milling cutter is provided with a large number of micro cutting edges, has chip breaking and chipping effects, and inhibits burr formation;
the tracks of the right-handed spherical spiral micro-grooves (35) and the left-handed spherical spiral micro-grooves (36) are symmetrically staggered right-handed spherical spiral lines and left-handed spherical spiral lines, and the spherical centers of the right-handed spherical spiral lines and the left-handed spherical spiral lines are the same as the spherical center of the cutter head (3);
the left-handed spherical helical line axis (31) and the right-handed spherical helical line axis (33) are in the same plane as the tool axis (4) and are symmetrical with respect to the tool axis (4), and the angle between the left-handed spherical helical line axis (31) and the right-handed spherical helical line axis (33) and the tool axis (4) is 20 DEG to 40 DEG;
the preparation method specifically comprises the following steps:
step one: grinding the blank bar of the cutter to form the profile of the milling cutter;
step two: sharpening the cutter head (3), and further forming a plurality of right-handed spherical spiral micro-grooves (35) and left-handed spherical spiral micro-grooves (36) on the cutter head (3) to form an array micro-tooth structure (34);
step three: two axisymmetric spiral chip grooves (32) are processed on the cutter head (3) to form a ball head micro-milling cutter with an array micro-tooth structure (34);
the right-handed spherical spiral micro-groove (35) and the left-handed spherical spiral micro-groove (36) are isosceles triangles, the length of the bottom side of each isosceles triangle is 30-200 mu m, and the height of each isosceles triangle is 10-100 mu m;
the micro-tooth structure is diamond, the long diagonal line is 20-70 μm, the short diagonal line is 10-40 μm, and the acute angle is 30-80 degrees.
2. The method for preparing the ball nose micro-milling cutter with the array micro-tooth structure, which is characterized in that: the overall length of the milling cutter is 40-50 mm, and the helix angle of the spiral chip groove (32) is 25-40 degrees.
3. The method for preparing the ball nose micro-milling cutter with the array micro-tooth structure, which is characterized in that: in the first step, a precise cutter sharpening machine is adopted to grind a cutter blank bar stock through a grinding wheel, and a forming grinding wheel (6) is adopted to grind two axisymmetric spiral chip grooves (32).
4. The method for preparing the ball nose micro-milling cutter with the array micro-tooth structure, which is characterized in that: in the second step, a diamond grinding wheel (5) is adopted to grind the cutter head (3) precisely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210804964.6A CN115070518B (en) | 2022-07-08 | 2022-07-08 | Ball head micro milling cutter with array micro tooth structure and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210804964.6A CN115070518B (en) | 2022-07-08 | 2022-07-08 | Ball head micro milling cutter with array micro tooth structure and preparation method thereof |
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| Publication Number | Publication Date |
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| CN115070518A CN115070518A (en) | 2022-09-20 |
| CN115070518B true CN115070518B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210804964.6A Active CN115070518B (en) | 2022-07-08 | 2022-07-08 | Ball head micro milling cutter with array micro tooth structure and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5882150A (en) * | 1996-07-18 | 1999-03-16 | Dijet Industrial Co., Ltd. | Indexable end mill |
| JP2010162677A (en) * | 2009-01-19 | 2010-07-29 | Hitachi Tool Engineering Ltd | Small-diameter cbn ball end mill |
| CN102120275A (en) * | 2011-01-14 | 2011-07-13 | 浙江瑞亨精密工具有限公司 | Minitype diamond-tooth milling cutter and processing technology thereof |
| CN103567521A (en) * | 2013-11-14 | 2014-02-12 | 苏州万一刀具工业有限公司 | Two-blade bulb milling cutter for aluminum |
| DE102012019804A1 (en) * | 2012-10-10 | 2014-04-10 | Hufschmied Zerspanungssysteme Gmbh | Face milling cutter for machining fiber-reinforced materials such as CFRP |
| WO2016098092A1 (en) * | 2014-12-15 | 2016-06-23 | Iscar Ltd. | Rotary cutting tool having a predetermined number of left and right handed helical flutes and end face cutting teeth |
| CN106825713A (en) * | 2017-02-21 | 2017-06-13 | 山东大学 | The manufacture method and milling cutter of a kind of fine milling cutter of cermet |
| WO2019047557A1 (en) * | 2017-09-11 | 2019-03-14 | 大连理工大学 | Micro-teeth arrangement designable end mill having tip blade for dedicated use with carbon fiber composite material |
| WO2019162090A1 (en) * | 2018-02-21 | 2019-08-29 | Ceratizit Balzheim Gmbh & Co. Kg | Milling tool |
| CN209902329U (en) * | 2019-04-02 | 2020-01-07 | 常州市兴强工具有限公司 | Micro spherical milling cutter with low cutting stress |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7090442B2 (en) * | 2003-12-09 | 2006-08-15 | The Boeing Company | Shaper router and method |
-
2022
- 2022-07-08 CN CN202210804964.6A patent/CN115070518B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5882150A (en) * | 1996-07-18 | 1999-03-16 | Dijet Industrial Co., Ltd. | Indexable end mill |
| JP2010162677A (en) * | 2009-01-19 | 2010-07-29 | Hitachi Tool Engineering Ltd | Small-diameter cbn ball end mill |
| CN102120275A (en) * | 2011-01-14 | 2011-07-13 | 浙江瑞亨精密工具有限公司 | Minitype diamond-tooth milling cutter and processing technology thereof |
| DE102012019804A1 (en) * | 2012-10-10 | 2014-04-10 | Hufschmied Zerspanungssysteme Gmbh | Face milling cutter for machining fiber-reinforced materials such as CFRP |
| CN103567521A (en) * | 2013-11-14 | 2014-02-12 | 苏州万一刀具工业有限公司 | Two-blade bulb milling cutter for aluminum |
| WO2016098092A1 (en) * | 2014-12-15 | 2016-06-23 | Iscar Ltd. | Rotary cutting tool having a predetermined number of left and right handed helical flutes and end face cutting teeth |
| CN106825713A (en) * | 2017-02-21 | 2017-06-13 | 山东大学 | The manufacture method and milling cutter of a kind of fine milling cutter of cermet |
| WO2019047557A1 (en) * | 2017-09-11 | 2019-03-14 | 大连理工大学 | Micro-teeth arrangement designable end mill having tip blade for dedicated use with carbon fiber composite material |
| WO2019162090A1 (en) * | 2018-02-21 | 2019-08-29 | Ceratizit Balzheim Gmbh & Co. Kg | Milling tool |
| CN209902329U (en) * | 2019-04-02 | 2020-01-07 | 常州市兴强工具有限公司 | Micro spherical milling cutter with low cutting stress |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115070518A (en) | 2022-09-20 |
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