CN114888343A - Little tooth milling cutter's cutting edge and little tooth milling cutter - Google Patents
Little tooth milling cutter's cutting edge and little tooth milling cutter Download PDFInfo
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- CN114888343A CN114888343A CN202210458770.5A CN202210458770A CN114888343A CN 114888343 A CN114888343 A CN 114888343A CN 202210458770 A CN202210458770 A CN 202210458770A CN 114888343 A CN114888343 A CN 114888343A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C5/00—Milling-cutters
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- 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
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Abstract
The invention provides a cutting edge of a micro-tooth milling cutter and the micro-tooth milling cutter, wherein the sum of the projection lengths of a right-handed blade and a left-handed groove in the axial direction of the cutter is taken as a cutting unit length L by the cutting edge, and the cutting unit length L comprises the projection length L of the right-handed blade in the axial direction of the cutter 1 And the projection length L of the left-hand groove in the axial direction of the cutter 2 Height difference L of two adjacent right-handed blades in axial direction 3 (ii) a Right hand helix angle beta R The range is 5-35 degrees, and the left-hand spiral angle beta L The range is 25-70 degrees. The invention has the beneficial effects that: the series of micro-tooth milling cutters have clear logical relations among the number of the edges, the left-handed spiral angle, the right-handed spiral angle and the edge length, and have restrictive relations among parameter adjustment, so that the stability of the performance of the cutters can be ensured, and a series of micro-tooth milling cutters suitable for different processing working conditions can be formed after main parameters are adjusted according to requirements.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a cutting edge of a micro-tooth milling cutter and the micro-tooth milling cutter.
Background
Fiber reinforced composite materials represented by carbon fiber composite materials (CFRP) have the advantages of high specific strength, high specific stiffness, excellent fatigue resistance, corrosion resistance and the like, and are widely applied to the fields of aerospace, wind power generation, rail transit, sports goods and the like. The fiber reinforced composite material belongs to a typical difficult-to-machine material, and is very easy to generate processing defects such as burrs, tears, delamination and the like in the processing process, and the processing defects can seriously damage the mechanical properties of the material, so that the random uncontrollable reduction of the bearing capacity, the tensile strength and the fatigue life of the material is caused.
In the milling process of the carbon fiber composite material, research needs to be carried out from three directions of a cutter structure, a base material and a coating. In the existing solutions, a typical solution is to use a micro-tooth milling cutter to remove micro elements of a material, so as to realize a processing mode of milling instead of grinding, thereby reducing the damage of the material.
The general problem in the existing solution is that the arrangement design consideration of the micro-tooth structure is insufficient, the invention of 'micro-tooth arrangement design method for inhibiting the edge damage of the cutting edge of the multi-edge micro-tooth milling cutter' invented by the university of the major graduates, gazelle, and the like, and the patent application No. 201810495696.8 discloses a micro-tooth arrangement design method for inhibiting the anti-tipping and anti-abrasion performance of the edge of the micro-tooth, and providing the service life and the cutting performance of the milling cutter. The patent number 201910075656.2 discloses a multi-tooth design method capable of realizing alternate cutting of a left-handed cutting edge and a right-handed cutting edge, which is invented by Wangfuji, university of great concatage and the like, and a micro-tooth arrangement design method is invented, so that the processing mode that the right-handed cutting edge and the left-handed cutting edge of an effective cutting part of a multi-edge milling cutter alternately cut on different sections can be realized, the continuous action of axial forces in different directions on CFRP surface layer fibers is ensured, and the purpose of inhibiting the generation of surface layer burrs of a carbon fiber composite material by high-speed milling is realized. However, the design of the micro-tooth milling cutter disclosed by the patent only optimizes the design of two adjacent micro-tooth edges at the local part of the micro-tooth, the micro-tooth design is not considered from the whole cutter, the structural form of the cutter is single, the parameters of the cutter have no clear logical relationship, and the slight adjustment of part of the parameters can cause great fluctuation of the performance of the cutter.
Disclosure of Invention
The invention provides a cutting edge of a micro-tooth milling cutter, which comprises a cutting edge body, a left-handed groove and a right-handed groove, wherein the left-handed spiral angle is beta L With a right-handed helix angle of beta R ；
When the cutting edge body is a right-handed blade, the right-handed groove is a main chip removal groove, the sum of the projection lengths of the right-handed blade and the left-handed groove in the axial direction of the cutter is taken as a cutting unit length L, wherein the cutting unit length L comprises the projection length L of the right-handed blade in the axial direction of the cutter 1 And the projection length L of the left-hand groove in the axial direction of the cutter 2 Height difference L of two adjacent right-handed blades in axial direction 3 Angle of right-handed helix beta R The range is 5-35 degrees, and the left-hand spiral angle beta L The range is 25-70 degrees;
when the cutting edge body is a left-handed cutting edge, the left-handed groove is a main chip discharge groove, the sum of the projection lengths of the left-handed cutting edge and the right-handed groove in the axial direction of the cutter is used as a cutting unit length L, wherein the cutting unit length L comprises the projection length L of the left-handed cutting edge in the axial direction of the cutter 1 And the projection length L of the right-handed groove in the axial direction of the cutter 2 Axial height difference L of two adjacent left-handed blades 3 Left hand helix angle beta L The range of 5-35 degrees and the right-handed helix angle beta R The range is 25-70 degrees;
L 1 has a value range of (L- (n-1) L 3 ) 0.75L, where n is the period of the microteeth circumferential cycle.
As a further improvement of the invention, the right-hand helix angle beta R + left-hand helix angle beta L ≥40°。
As a further improvement of the invention, the number of the right-handed grooves is Z R The number of the left-handed grooves is Z L， The diameter of the blade is D, unit of DIs mm;
when the right-handed flute is the main flute, the number of the right-handed flutes Z R The selection range is as follows:
1＜D≤3，Z R taking a value of 4-8;
3＜D≤6，Z R taking 6-12 values;
6＜D≤10，Z R taking the value of 8-14;
10＜D≤20，Z R taking the value of 10-18;
when the left-handed groove is the main chip groove, the number of the left-handed grooves Z L The selection range is as follows:
1＜D≤3，Z L taking a value of 4-8;
3＜D≤6，Z L taking 6-12 values;
6＜D≤10，Z L taking the value of 8-14;
10＜D≤20，Z L the value is 10-18.
As a further improvement of the invention, the diameter of the blade is D, and the length L of the cutting unit ranges from (0.1-0.3) D.
As a further improvement of the invention, the calculation formula of the circumferential cycle period n of the micro-teeth is as follows:
(Z R ，Z L ) Is the number of right-handed slots Z R And the number of left-handed grooves Z L The greatest common divisor of (c).
As a further development of the invention, L 3 The calculation formula of (a) is as follows:
d is the diameter of the blade.
As a further improvement of the invention, when the cutting edge body is a right-handed cutting edge, the cutting edge diameter D is 10mm, and the right-handed helix angle beta R 15 deg. left-hand helix angle beta L 40 DEG, right hand slot number Z R 12, number of left-handed slots Z L ＝18，L＝1.58mm，n＝2，L 3 ＝0.79mm。
As a further development of the invention, L 1 The range is 0.79-1.19 mm.
As a further development of the invention, L 1 ＝0.84mm，L 2 ＝0.74mm。
As a further improvement of the invention, when the cutting edge body is a left-handed cutting edge, the cutting edge diameter D is 10mm, and the right-handed helix angle beta R 35 deg. left-hand helix angle beta L 20 deg. right hand slot number Z R 10, number of left-handed slots Z L ＝12，L＝2.95mm，n＝6，L 3 ＝0.49mm。
As a further development of the invention, L 1 The range is 0.5-2.21 mm.
As a further development of the invention, L 1 ＝1.8mm，L 2 ＝1.15mm。
The invention also provides a micro-tooth milling cutter which comprises a cutter handle, a transition section and the cutting edge, wherein the cutter handle is connected with the transition section, and the transition section is connected with the cutting edge.
The invention has the beneficial effects that: the series of micro-tooth milling cutters have clear logical relations among the number of the edges, the left-handed spiral angle, the right-handed spiral angle and the edge length, and have restrictive relations among parameter adjustment, so that the stability of the performance of the cutters can be ensured, and a series of micro-tooth milling cutters suitable for different processing working conditions can be formed after main parameters are adjusted according to requirements.
Drawings
FIG. 1 is a schematic structural view of a right-handed micro-tooth milling cutter;
FIG. 2 is a schematic diagram of a right-handed microteeth arrangement;
FIG. 3 is a schematic structural view of a left-handed micro-tooth milling cutter;
fig. 4 is a schematic view of left-handed micro-tooth arrangement.
Detailed Description
The invention discloses a micro-tooth milling cutter which comprises a cutting edge 10, a transition section 20 and a cutter handle 30, wherein the cutter handle 30 is connected with the transition section 20, and the transition section 20 is connected with the cutting edge 10. The invention relates to a cutting edge 10 part, and the main technical parameters comprise: the number of right-handed grooves, the right-handed helix angle, the number of left-handed grooves, the left-handed helix angle and the right-handed bladeHas an axial projection length L 1 。
The cutting edge 10 comprises a cutting edge body, a left-handed groove 13 and a right-handed groove 12.
As shown in FIG. 1, when the cutting edge body is a right-handed cutting edge 11, the three-dimensional micro-tooth milling cutter structure is developed into a two-dimensional milling cutter micro-tooth structure arrangement pattern with the axis as the center, the effective cutting units of the intercepted part are shown in FIG. 2, and the right-handed helical angle is beta R The left-hand helix angle is beta L The sum of the projection lengths of a right-handed blade 11 and a left-handed flute 13 in the axial direction of the cutter (the cutter is referred to as the micro-tooth milling cutter of the invention) is taken as a cutting unit length L, wherein the projection length L of the right-handed blade 11 in the axial direction of the cutter is included 1 And the projection length L of the left-hand groove 13 in the axial direction of the tool 2 The height difference L of two adjacent right-handed blades 11 in the axial direction 3 . The diameter of the cutting edge of the cutter is D, and the number of right-handed grooves is Z R The number of the left-handed grooves is Z L 。
Right hand helix angle beta R The range is 5-35 DEG, beta L The range is 25-70 degrees, and meanwhile, in order to ensure the strength of the sharp angle of the micro-teeth, the beta is ensured R +β L ≥40°。
Number of right-handed slots Z R Selected according to the diameter of the tool and the machining parameters of the tool, Z R The selected value range is shown in the following table, the chip capacity of a chip groove of the cutter and the strength of the micro-teeth of the cutter can be adjusted by the number of right-handed blades in a certain range, and the cutter is suitable for processing different composite materials:
TABLE 1 number of right-hand slots Z R Selection range
Number of left-handed grooves Z L The length L of the cutting unit is determined, the value range of the length L of the cutting unit is (0.1-0.3) D, and the length L of the unit with a smaller scale is suitable for being selected under the condition that the material fiber is high in strength and easy to generate processing defects.
Length L of right-handed blade 1 The selection of the tool which needs to meet the requirement of the right-handed blade 11 is axially and fully covered, L 1 In the range of (A)L-(n-1)L 3 )～0.75L。
Wherein n is the circumferential cycle period of the micro-teeth and the number Z of the grooves receiving the left rotation L And number of right-handed slots Z R The influence of the proportion of (a) is that under the condition that the cutter micro-tooth needs to bear larger cutting force under larger feed, the circumferential cycle number n of the micro-tooth is preferably smaller, and the calculation formula is as follows:
L 3 for the height difference of two adjacent right-handed blades 11 in the axial direction, the calculation formula is as follows:
description of the drawings: (Z) R ，Z L ) Is Z R And Z L The greatest common divisor of (c).
As shown in fig. 3 and 4, when the cutting edge body is the left-handed edge 14, the sum of the projection lengths of the left-handed edge 14 and the right-handed groove 12 in the axial direction of the tool is taken as a cutting unit length L, wherein the cutting unit length L includes the projection length L of the left-handed edge 14 in the axial direction of the tool 1 And the projection length L of the right-handed groove 12 in the axial direction of the tool 2 Height difference L in the axial direction between two adjacent left-handed blades 14 3 Angle of right-handed helix beta R The range is 25-70 degrees, and the left-hand spiral angle beta L The range is 5-35 degrees, and the left-hand groove 13 is a main chip removal groove.
As preferred embodiment 1 of the present invention:
the cutter of the embodiment is used for right-handed cutting, and the right-handed groove is a main chip removal groove.
The processing material object is a high-strength carbon fiber reinforced composite material T800;
the diameter D of the blade is 10 mm;
right hand helix angle beta R ＝15°；
Left hand helix angle beta L ＝40°；
Number of right-hand slots Z R ＝12；
Number of left-handed grooves Z L ＝18；
L＝1.58mm；
L 1 ＝0.84mm；
L 2 ＝0.74mm。
The cutting life verification of the cutter is carried out on the site of a user in the preferred embodiment 1, the T300CFRP copper-clad plate with the thickness of 4mm is cut in a slot mode under the processing parameters of the rotating speed of 8000rpm and the feeding speed of 1000mm/min, the service life of the cutter is shown in the table 2, compared with competitive products at home and abroad, the service life of the cutter is improved by more than 50%, and the advantages are obvious.
TABLE 2 comparative test results of tool life
As preferred embodiment 2 of the present invention:
the cutter of the embodiment is used for left-handed and right-handed cutting, and the left-handed groove is a main chip removal groove.
The processing material object is a glass fiber reinforced composite material;
the diameter D of the blade is 10 mm;
left hand helix angle beta L ＝20°；
Right hand helix angle beta R ＝35°；
Number of left-handed grooves Z L ＝12；
Number of right-handed slots Z R ＝10；
L＝2.95mm；
L 1 ＝1.8mm；
Then L is 2 ＝1.15mm。
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, numerous simple deductions or substitutions may be made without departing from the spirit of the invention, which shall be deemed to belong to the scope of the invention.
Claims (13)
1. A cutting edge of a micro-tooth milling cutter is characterized in that: comprises a cutting edge body, a left-handed groove and a right-handed groove, wherein the left-handed spiral angle is beta L With a right-handed helix angle of beta R ；
When the cutting edge body is a right-handed blade, the right-handed groove is a main chip removal groove, the sum of the projection lengths of the right-handed blade and the left-handed groove in the axial direction of the cutter is taken as a cutting unit length L, wherein the cutting unit length L comprises the projection length L of the right-handed blade in the axial direction of the cutter 1 And the projection length L of the left-hand groove in the axial direction of the cutter 2 Height difference L of two adjacent right-handed blades in axial direction 3 Angle of right-handed helix beta R The range is 5-35 degrees, and the left-hand spiral angle beta L The range is 25-70 degrees;
when the cutting edge body is a left-handed cutting edge, the left-handed groove is a main chip discharge groove, the sum of the projection lengths of the left-handed cutting edge and the right-handed groove in the axial direction of the cutter is used as a cutting unit length L, wherein the cutting unit length L comprises the projection length L of the left-handed cutting edge in the axial direction of the cutter 1 And the projection length L of the right-handed groove in the axial direction of the cutter 2 Axial height difference L of two adjacent left-handed blades 3 Left hand helix angle beta L The range is 5-35 degrees, and the right-handed helix angle is beta R The range is 25-70 degrees;
L 1 has a value range of (L- (n-1) L 3 ) 0.75L, where n is the period of the circumferential cycle of the microteeth.
2. The cutting edge of claim 1, wherein: right hand helix angle beta R + left-hand helix angle beta L ≥40°。
3. The cutting edge of claim 1, wherein: the number of right-handed grooves is Z R The number of the left-handed grooves is Z L The diameter of the blade is D, and the unit of D is mm;
when the right-handed flute is the main flute, the number of the right-handed flutes Z R The selection range is as follows:
1＜D≤3，Z R taking a value of 4-8;
3＜D≤6，Z R taking 6-12 values;
6＜D≤10，Z R taking the value of 8-14;
10＜D≤20，Z R taking the value of 10-18;
when the left-handed groove is the main chip groove, the number of the left-handed grooves Z L The selection range is as follows:
1＜D≤3，Z L taking a value of 4-8;
3＜D≤6，Z L taking 6-12 values;
6＜D≤10，Z L taking the value of 8-14;
10＜D≤20，Z L the value is 10-18.
4. The cutting edge of claim 1, wherein: the diameter of the blade is D, and the length L of the cutting unit ranges from (0.1-0.3) D.
5. The cutting edge of claim 1, wherein: the calculation formula of the circumferential cycle period n of the micro-teeth is as follows:
(Z R ，Z L ) Is the number of right-handed slots Z R And the number of left-handed grooves Z L The greatest common divisor of (c).
6. The cutting edge of claim 1, wherein: l is 3 The calculation formula of (a) is as follows:
d is the diameter of the blade.
7. The cutting edge of claim 1, wherein: when the cutting edge body is a right-handed cutting edge, the edge diameter D is 10mm, and the right-handed helix angle beta R 15 deg. left-hand helix angle beta L 40 DEG, right hand slot number Z R 12, number of left-handed slots Z L ＝18，L＝1.58mm，n＝2，L 3 ＝0.79mm。
8. The cutting edge of claim 7, wherein: l is 1 The range is 0.79-1.19 mm.
9. The cutting edge of claim 8, wherein: l is 1 ＝0.84mm，L 2 ＝0.74mm。
10. The cutting edge of claim 1, wherein: when the cutting edge body is a left-handed cutting edge, the edge diameter D is 10mm, and the right-handed helix angle beta R 35 deg. left-hand helix angle beta L 20 deg. right hand slot number Z R 10, number of left-handed slots Z L ＝12，L＝2.95mm，n＝6，L 3 ＝0.49mm。
11. The cutting edge of claim 10, wherein: l is 1 The range is 0.5-2.21 mm.
12. The cutting edge of claim 11, wherein: l is 1 ＝1.8mm，L 2 ＝1.15mm。
13. A micro-tooth milling cutter is characterized in that: comprising a shank, a transition section and a cutting edge according to any one of claims 1 to 12, the shank being connected to the transition section, the transition section being connected to the cutting edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210458770.5A CN114888343A (en) | 2022-04-27 | 2022-04-27 | Little tooth milling cutter's cutting edge and little tooth milling cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210458770.5A CN114888343A (en) | 2022-04-27 | 2022-04-27 | Little tooth milling cutter's cutting edge and little tooth milling cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114888343A true CN114888343A (en) | 2022-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210458770.5A Pending CN114888343A (en) | 2022-04-27 | 2022-04-27 | Little tooth milling cutter's cutting edge and little tooth milling cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114888343A (en) |
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- 2022-04-27 CN CN202210458770.5A patent/CN114888343A/en active Pending
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