CN107824855B - Milling cutter with groove width gradual change type chip breaking groove - Google Patents
Milling cutter with groove width gradual change type chip breaking groove Download PDFInfo
- Publication number
- CN107824855B CN107824855B CN201711022808.XA CN201711022808A CN107824855B CN 107824855 B CN107824855 B CN 107824855B CN 201711022808 A CN201711022808 A CN 201711022808A CN 107824855 B CN107824855 B CN 107824855B
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- Prior art keywords
- cutter
- chip breaker
- milling cutter
- degrees
- groove
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- 238000003801 milling Methods 0.000 title claims abstract description 35
- 238000007599 discharging Methods 0.000 abstract description 7
- 239000000428 dust Substances 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000000227 grinding Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- WNEODWDFDXWOLU-QHCPKHFHSA-N 3-[3-(hydroxymethyl)-4-[1-methyl-5-[[5-[(2s)-2-methyl-4-(oxetan-3-yl)piperazin-1-yl]pyridin-2-yl]amino]-6-oxopyridin-3-yl]pyridin-2-yl]-7,7-dimethyl-1,2,6,8-tetrahydrocyclopenta[3,4]pyrrolo[3,5-b]pyrazin-4-one Chemical compound C([C@@H](N(CC1)C=2C=NC(NC=3C(N(C)C=C(C=3)C=3C(=C(N4C(C5=CC=6CC(C)(C)CC=6N5CC4)=O)N=CC=3)CO)=O)=CC=2)C)N1C1COC1 WNEODWDFDXWOLU-QHCPKHFHSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
- B23C5/16—Milling-cutters characterised by physical features other than shape
- B23C5/165—Milling-cutters characterised by physical features other than shape with chipbreaking or chipdividing equipment
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
The invention is suitable for the technical field of milling cutters, and discloses a milling cutter with a groove width gradual change type chip breaker, which comprises a milling cutter body, wherein the milling cutter body comprises a cutter handle part and a cutter edge part connected with the cutter handle part, the cutter edge part is provided with at least two main spiral grooves and at least one chip breaker, the rotation direction of the chip breaker is opposite to that of the main spiral grooves, the width of the chip breaker is reduced from the direction of the cutting edge root of the cutter edge part in the cutting tip direction, the rotation helix angle of the main spiral grooves ranges from 20 degrees to 45 degrees, and the rotation helix angle of the chip breaker ranges from 20 degrees to 85 degrees. The milling cutter with the groove width gradual change type chip breaker groove provided by the invention has the advantages that the chip breaker groove gradually reduces from front to back, the dust discharging space of the cutter tip is simultaneously increased under the condition of ensuring the whole chip discharging space of the cutter, the dust blocking phenomenon of the cutter tip is solved, the machining quality of the plate edge is good, the abrasion of the cutter can be reduced, and the service life of the cutter is prolonged.
Description
Technical Field
The invention belongs to the technical field of milling cutters, and particularly relates to a milling cutter with groove width gradual change type chip breaking grooves.
Background
Along with the development trend of light weight, miniaturization and high reliability of electronic system products, the wiring density of glass fiber cloth used in the Printed Circuit Board (PCB) plate with high integration and multilayering is required to be more and more dense, so that the milling difficulty is increased, copper foil cutting and winding cutters and glass fiber chip removal are difficult, the situation that the chip removal of the PCB is poor in the milling process is caused, and then the adverse phenomena of short service life of cutters, burrs on the edges of the processed PCB and the like are caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides the milling cutter with the groove width gradual change type chip breaking grooves, which has the advantages of good chip removal effect, good plate edge processing quality and long service life.
The technical scheme of the invention is as follows: the milling cutter with the flute width gradient type chip breaker comprises a milling cutter body, wherein the milling cutter body comprises a cutter handle part and a cutting edge part connected with the cutter handle part, the cutting edge part is provided with at least two main spiral flutes and at least one chip breaker, the rotation direction of the chip breaker is opposite to that of the main spiral flute, the width of the chip breaker is reduced from the direction of the cutting edge root of the cutting edge part in the cutting tip direction, the rotation helix angle of the main spiral flute ranges from 20 degrees to 45 degrees, and the rotation helix angle of the chip breaker ranges from 20 degrees to 85 degrees.
Optionally, the chip breaker groove has a contact ratio between adjacent cutter teeth of different cutting edges of 0.04 to 0.15 and mm.
Optionally, the front tooth width of the chip breaker groove is greater than the end tooth width by 0 to 0.07mm.
Optionally, the front tooth width of the chip breaker groove is 0.03 to 0.05mm greater than the end tooth width.
Optionally, two main spiral grooves are arranged, the spiral direction of the main spiral groove is right-handed, one chip breaker groove is left-handed, and the spiral angle range of the main spiral groove is 20-30 degrees.
Optionally, the front end of the blade part is composed of two dovetail-shaped blade tips, and the cutting edge angles of the two blade tips are 120-160 degrees.
Optionally, the relief angle of the nose is 6 ° to 18 °.
Optionally, the distance between the cutting surfaces of the two tool tips is 0.05-0.3mm.
Optionally, the rake angle of the blade portion ranges from 4 ° to 15 °
Optionally, the relief angle of the blade edge portion ranges from 8 ° to 30 °.
According to the milling cutter with the flute width gradual change type chip breaker, the width of the chip breaker is gradually reduced from front to back, under the condition that the whole chip removal space of a cutter is ensured, the dust discharging space of the cutter tip is simultaneously increased, the phenomenon that dust is blocked at the cutter tip is solved, metal chips are forced to break, the whole chip breaking capacity is improved, a large amount of cutting heat can be taken away by high-efficiency discharging of the chips, the abrasion of the cutter can be reduced, the service life of the cutter is prolonged, the chip breaking capacity can be further improved by the design of a left-hand spiral angle, and the machining quality of a plate edge is good.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a front view of a milling cutter having a groove width gradient type chip breaker groove provided in an embodiment of the present invention;
fig. 2 is a right side view of a milling cutter having a groove width gradient type chip breaker groove according to an embodiment of the present invention;
fig. 3 is a schematic partial plan view of a milling cutter having a groove width gradient type chip breaker groove according to an embodiment of the present invention.
Description of the embodiments
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
It should be noted that, in the embodiments of the present invention, terms such as left, right, up, and down are merely relative concepts or references to normal use states of the product, and should not be construed as limiting.
As shown in fig. 1 to 3, the milling cutter with the flute width gradient type chip breaker provided by the embodiment of the invention comprises a milling cutter body, wherein the milling cutter body comprises a cutter shank 1 and a cutting edge part 2 connected with the cutter shank 1, a bevel section 3 can be connected between the cutter shank 1 and the cutting edge part 2, and the bevel section 3 can be in a truncated cone shape. The blade 2 has at least two main spiral grooves 21 and at least one chip breaker groove 22, the direction of rotation of the chip breaker groove 22 is opposite to the direction of rotation of the main spiral groove 21, and the width of the chip breaker groove 22 decreases from the direction of the blade tip of the blade 2 toward the blade root, i.e., the groove width of the chip breaker groove 22 gradually decreases from front to back. The main spiral groove 21 has a spiral angle ranging from 20 degrees to 45 degrees, the chip breaker 22 has a double-spiral blade ranging from 20 degrees to 85 degrees, the chip breaker 22 with unequal widths from the tip to the root of the effective cutting edge is designed on the double-spiral blade, the tip chip breaker 22 is wider than the root, the maximum chip removal space of the tip is ensured, the integral rigidity and strength of the root of the cutter body are ensured, and the difficult problems of cutting broken chips and poor chip removal are solved. And when the chip breaker groove 22 is opened, allowance is left on the rear cutter surface, the rear angle of the cutting edge can be controlled by the back-off grinding wheel grinding, the sharpness of the cutter can be adjusted, the problem of burrs on the plate edge can be solved, and the service life of the cutter can be maximized by selecting a proper cutting edge radius.
Optionally, the overlap ratio of the chip breaker 22 between adjacent cutter teeth of different cutting edges is 0.04-0.15 mm, that is, the chip breaker 22 on the adjacent cutter teeth of adjacent different cutting edges is in a certain overlap section, so that the chip breaking performance is better, and each circle of the chip breaker 22 can cut off the chips at least once per revolution of the drill. In particular applications, the chip breaker 22 may have a contact ratio between adjacent teeth of from 0.06 mm to 0.12 mm, such as from 0.08 mm to 0.1 mm.
Optionally, the front tooth width of the chip breaker groove 22 is 0 to 0.07 and mm larger than the end tooth width, so as to ensure the whole rigidity and strength of the cutter body root while better ensuring the maximization of the tip chip removing space. In particular applications, the front tooth width of the chip breaker groove 22 is greater than the end tooth width by 0.03 to 0.05mm, such as 0.04 mm.
Optionally, the front tooth width of the chip breaker 22 is greater than the end tooth width by 0.03-mm to 0.05-mm, and in a specific application, the front tooth width of the chip breaker 22 may be greater than the end tooth width by 0.04-mm.
In a specific application, the shape of the chip breaker 22 may be set according to practical situations, and the cross section of the chip breaker 22 may be V-shaped, trapezoidal, rectangular or the like.
Optionally, two main spiral grooves 21 are arranged, the rotation direction is right-handed, one chip breaker groove 22 is arranged, the rotation direction is left-handed, a left-handed and right-handed spiral groove structure is adopted, the right-handed spiral is the main spiral, and the number of right-handed edges is 2; the left spiral is formed by a single spiral groove; has the structural characteristics of double cutting edges.
Optionally, the spiral angle gamma of the main spiral groove 21 ranges from 20 ° to 30 °, preferably from 23 ° to 27 °, such as 25 °, and the right-hand spiral angle is designed, so that the rigidity and strength of the whole cutter can be controlled, the cutting capability of the cutting edge can be improved, the chip removing space of the spiral groove of the cutter can be increased, and the temperature of the cutting area can be reduced.
Alternatively, the front end of the blade portion 2 may be formed by two dovetail-shaped tips, the cutting edges of which have an angle of 120 ° to 160 °, for example 130 ° to 150 °, and in particular applications, the angle between the cutting edges may be 140 °.
Alternatively, the relief angle of the nose may be 4 ° to 28 °, such as 6 ° to 18 °, in particular applications, the relief angle of the nose may be 8 ° to 16 °.
Alternatively, the cutting surfaces of the tips are spaced from 0.05mm to 0.3mm, such as 0.1 mm to 0.2 mm.
Alternatively, the rake angle a of the cutting edge portion 2 may range from 4 ° to 15 °, for example from 5 ° to 12 °, in a specific application, the rake angle a of the cutting edge may range from 6 ° to 10 °, to further enhance the overall cutting capability of the tool.
Alternatively, the relief angle b of the blade portion 2 may range from 8 ° to 30 °, for example from 10 ° to 22 °, in particular applications the relief angle b of the blade may range from 16 ° to 20 °. The cutting edge cutting tool has the advantages that the sharpness of the cutting edge can be controlled by combining the structures of the chip breaking groove 22, the main spiral groove 21 and the tool tip, the cutting edge burr problem is solved by improving the chip breaking effect of machining, the most proper cutting edge radius is selected, the service life of the cutting tool is maximized, the friction between the rear tool face and the machined surface can be reduced, the chip removing space is increased, and the service life of the cutting tool is further prolonged.
Optionally, the surface of the blade portion 2 may be provided with a coating to improve performance and extend lifetime.
Alternatively, the diameter of the blade portion 2 may be 0.30 to 3.175mm.
The processing method of the milling cutter with the groove width gradual change type chip breaking groove 22 provided by the embodiment of the invention can be referred as follows: grinding right-handed helical flute (main helical flute 21), grinding left-handed helical flute (chip breaker flute 22), grinding back and sharpening the milling cutter.
According to the milling cutter with the flute width gradual change type chip breaker, the width of the chip breaker 22 is gradually reduced from front to back, so that the dust discharging space of the cutter tip is increased under the condition of ensuring the whole chip discharging space of the cutter, the phenomenon that the cutter tip is blocked by dust is solved, metal chips are forced to break, the whole chip breaking capacity is improved, a large amount of cutting heat can be taken away by high-efficiency discharging of the chips, the abrasion of the cutter can be reduced, the chip breaking capacity can be further improved by the design of a left-handed spiral angle, the problem of plate edge quality is solved, and the plate edge quality is good.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The milling cutter with the flute width gradient type chip breaker comprises a milling cutter body, wherein the milling cutter body comprises a cutter handle part and a cutting edge part connected with the cutter handle part, the cutting edge part is provided with at least two main spiral flutes and at least one chip breaker, and the rotation direction of the chip breaker is opposite to that of the main spiral flute, and the milling cutter is characterized in that the width of the chip breaker is reduced from the direction of a cutting edge root of the cutting edge part in the tip direction, the rotation helix angle range of the main spiral flute is 20-45 degrees, and the rotation helix angle range of the chip breaker is 20-85 degrees; the overlap ratio of the chip breaker groove on adjacent cutter teeth of different cutting edges is 0.04-0.15 mm; the main spiral grooves are provided with two spiral angles, the spiral directions of the main spiral grooves are right-handed, the chip breaker grooves are provided with one chip breaker groove, the spiral directions of the main spiral grooves are left-handed, and the spiral angle range of the main spiral grooves is 20-30 degrees; the front end of the blade part is composed of two dovetail-shaped blade tips, and the cutting edge angles of the two blade tips are 120-160 degrees.
2. The milling cutter with a flute width gradient chipbreaker of claim 1 wherein the front end tooth width of the chipbreaker is greater than the end tooth width by 0 to 0.07mm.
3. The milling cutter with a flute width gradient chipbreaker of claim 1 wherein the front end tooth width of the chipbreaker is 0.03 to 0.05mm greater than the end tooth width.
4. A milling cutter with a flute width gradient chipbreaker as claimed in claim 1 wherein the relief angle of the nose is 6 ° to 18 °.
5. A milling cutter with a flute width gradient chipbreaker as claimed in claim 1 wherein the cutting face distance of the two tips is 0.05-0.3mm.
6. A milling cutter with a flute width gradient chipbreaker as claimed in claim 1 wherein the rake angle of the edge portion is in the range of 4 ° to 15 °.
7. A milling cutter with a flute width gradient chipbreaker as claimed in claim 1 wherein the relief angle of the edge portion is in the range of 8 ° to 30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711022808.XA CN107824855B (en) | 2017-10-27 | 2017-10-27 | Milling cutter with groove width gradual change type chip breaking groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711022808.XA CN107824855B (en) | 2017-10-27 | 2017-10-27 | Milling cutter with groove width gradual change type chip breaking groove |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107824855A CN107824855A (en) | 2018-03-23 |
| CN107824855B true CN107824855B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108581001B (en) * | 2018-06-12 | 2024-01-30 | 深圳市金洲精工科技股份有限公司 | Single-edge milling cutter |
| CN108746794A (en) * | 2018-08-03 | 2018-11-06 | 昂华（上海）自动化工程股份有限公司 | A kind of screw-on cutter |
| CN111390258A (en) * | 2020-04-26 | 2020-07-10 | 深圳市金洲精工科技股份有限公司 | Milling cutter |
| CN114700813B (en) * | 2022-03-14 | 2024-04-12 | 金洲精工科技(昆山)有限公司 | Method for quickly positioning circumferential direction of tool nose of cylindrical end mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09103909A (en) * | 1996-08-02 | 1997-04-22 | Mitsubishi Materials Corp | Throw-away chip for rotary cutting tool |
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| CN101085474A (en) * | 2006-06-09 | 2007-12-12 | 弗兰肯有限责任两合公司 | Cutting tool |
| CN201483059U (en) * | 2009-08-18 | 2010-05-26 | 深圳市金洲精工科技股份有限公司 | Milling cutter for shaping and processing circuit board and special grinding wheel thereof |
| CN201922096U (en) * | 2011-01-27 | 2011-08-10 | 浙江瑞亨精密工具有限公司 | Hard alloy milling cutter for chip-breaking groove |
| CN102500806A (en) * | 2011-10-26 | 2012-06-20 | 株洲钻石切削刀具股份有限公司 | Indexible circular milling insert and milling tool |
| CN103433542A (en) * | 2013-08-30 | 2013-12-11 | 深圳市金洲精工科技股份有限公司 | Precision milling cutter and processing method thereof |
| CN206104985U (en) * | 2016-10-10 | 2017-04-19 | 上海泰锋精密刀具股份有限公司 | Singleblade milling cutter structure |
| CN207547723U (en) * | 2017-10-27 | 2018-06-29 | 深圳市金洲精工科技股份有限公司 | A kind of milling cutter with groove width gradual change type chip-breaker |
-
2017
- 2017-10-27 CN CN201711022808.XA patent/CN107824855B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09103909A (en) * | 1996-08-02 | 1997-04-22 | Mitsubishi Materials Corp | Throw-away chip for rotary cutting tool |
| CN101085474A (en) * | 2006-06-09 | 2007-12-12 | 弗兰肯有限责任两合公司 | Cutting tool |
| CN200981131Y (en) * | 2006-10-26 | 2007-11-28 | 成都飞机工业（集团）有限责任公司 | Drilling and countersinking composite milling cutter |
| CN201483059U (en) * | 2009-08-18 | 2010-05-26 | 深圳市金洲精工科技股份有限公司 | Milling cutter for shaping and processing circuit board and special grinding wheel thereof |
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| CN102500806A (en) * | 2011-10-26 | 2012-06-20 | 株洲钻石切削刀具股份有限公司 | Indexible circular milling insert and milling tool |
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| CN107824855A (en) | 2018-03-23 |
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