CN113664269B - Diamond coating cutter for efficiently processing composite material - Google Patents
Diamond coating cutter for efficiently processing composite material Download PDFInfo
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- CN113664269B CN113664269B CN202111073764.XA CN202111073764A CN113664269B CN 113664269 B CN113664269 B CN 113664269B CN 202111073764 A CN202111073764 A CN 202111073764A CN 113664269 B CN113664269 B CN 113664269B
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- 239000002131 composite material Substances 0.000 title claims abstract description 35
- 238000012545 processing Methods 0.000 title abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims abstract description 47
- 238000005520 cutting process Methods 0.000 claims abstract description 40
- 238000003801 milling Methods 0.000 claims abstract description 29
- 238000003754 machining Methods 0.000 claims abstract description 12
- 239000013078 crystal Substances 0.000 claims description 30
- SDGKUVSVPIIUCF-UHFFFAOYSA-N 2,6-dimethylpiperidine Chemical compound CC1CCCC(C)N1 SDGKUVSVPIIUCF-UHFFFAOYSA-N 0.000 claims description 14
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- UFGZSIPAQKLCGR-UHFFFAOYSA-N chromium carbide Chemical compound [Cr]#C[Cr]C#[Cr] UFGZSIPAQKLCGR-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Cutting Tools, Boring Holders, And Turrets (AREA)
Abstract
The invention discloses a diamond coating cutter for efficiently processing a composite material, which comprises a milling cutter cutting part and a milling cutter handle part, wherein the milling cutter cutting part comprises an end face part and a peripheral edge part; the end face part comprises an end face chip flute, an end edge and an end edge chip flute; the peripheral edge part comprises a plurality of peripheral edges uniformly distributed on the circumference, the peripheral edges comprise peripheral edge micro-edges and a plurality of spiral chip-breaking grooves, and the spiral chip-breaking grooves and the peripheral edge micro-edges are arranged in a staggered manner; chip grooves are formed between two adjacent peripheral edges, the chip grooves are straight grooves, and the spiral chip breaking grooves are communicated with the chip grooves; and the outlet of the end blade chip flute is communicated with the chip flute. The invention aims to solve the problem of difficult machining of CFRP materials, and improves the cutting stability and the service life of props by improving the chip breaking capacity of a cutter so as to reduce tremble during cutting.
Description
Technical Field
The invention relates to a milling cutter, in particular to a diamond coating cutter for efficiently processing a composite material.
Background
Carbon fiber reinforced polymer Composite (CFRP) is a composite material obtained by laminating a carbon fiber layer and a resin-based plastic material, has high specific strength, high specific modulus, low density (1.5-2 g/cm < 3 >) and good corrosion resistance and fatigue resistance compared with the traditional aviation aluminum alloy, and is widely applied to the aviation field. Common machining modes of the CFRP material comprise three modes of laser machining, jet flow machining and milling machining, wherein the thickness and a heat affected zone of a workpiece need to be considered in the laser machining, the jet flow machining is only suitable for rough cutting of the side edges, and fluid possibly reduces the interlayer bonding strength of the CFRP material. However, the characteristic of poor processability of the CFRP material seriously affects the use of the cutter, compared with metal, when the edge, the blind groove and the window are milled, the side surface of the workpiece is easy to form processing defects such as burrs, fiber tearing, layering, edge breakage and the like, the problems of rough processing surface, poor precision and the like are generated, and the problems can also lead to the reduction of the service life of the cutter and affect the processing efficiency. In addition, the CFRP material has poor heat conductivity and low melting point, so that the cutter is required to have good chip breaking, chip removal and heat dissipation performance during processing.
Diamond coatings are considered ideal coatings for processing CFRP materials due to their high hardness, high elastic modulus, high wear resistance, low coefficient of friction, and the like. The grain size mainly comprises a micron diamond coating, a nanometer diamond coating and a micro-nano diamond coating; the preparation method mainly comprises a hot wire method (HFCVD), a bias voltage enhancement method (BECVD), an electron enhancement hot wire method (EACVD), a direct current plasma method (DPJCVD), a microwave plasma Method (MPCVD) and the like. Compared with the traditional micron diamond coating, the nano diamond coating with the grain smaller than 100 nanometers has smaller roughness, the wear resistance is greatly improved, and the service life of the milling cutter is greatly prolonged.
The design and research of the existing CFRP material processing tool mainly concentrate on the traditional spiral groove milling cutter, "pineapple knife" and "scale milling cutter" and the like. For example, CN 101623778A discloses an "integral hard alloy scale milling cutter", the cutter blade portion is formed by micro cutting units divided by spiral grooves which are rotationally symmetrically staggered left and right, the blade length of each micro cutting unit is 0.05-0.1 mm, the width of the rear cutter face of the cutting blade is 0-0.01 mm, the advantages of the milling cutter are: the grinding process features are combined, a large number of tiny cutting units are utilized, so that the cutting resistance is reduced to a great extent, and the cutting speed and the surface quality of the workpiece are improved. However, the milling cutter has complex design structure, high processing difficulty and high manufacturing cost; each tiny cutting unit has low strength, is easy to wear and collapse during processing, and influences the cutting stability; the fish scale milling cutter has no chip groove design, a large amount of chips cannot be removed in time during high-speed cutting, and the temperature of a processing area is increased, so that the performance of the CFRP material is affected. CN 105364153A discloses a "flat end mill" which comprises at least two sets of helical flutes, a specific set of intersecting, oppositely-rotated helical flutes and cutting edges formed by the two and the relief surface. The milling cutter comprises the left-handed cutting edge and the right-handed cutting edge, and under the alternate cutting action of the two cutting edges, the cutting component forces with the periodical and opposite directions can furthest utilize the shearing effect to remove the defects of burrs, saw teeth and the like generated during processing the carbon fiber material, so that the surface quality of a workpiece is effectively improved. However, the milling cutter has poor chip breaking effect, and can easily generate larger tremble when machining CFRP materials with obvious orientation, thereby influencing cutting stability.
The design and research of the existing diamond coating mainly focuses on superfine nanocrystalline diamond coating, micro-nano composite diamond coating and the like. For example, CN 105506574B discloses a method for preparing a nano diamond coating and a nano diamond blade, the method comprises depositing a transition layer on the surface of hard alloy, then performing pretreatment, and finally depositing a nano diamond coating on the pretreated surface by adopting a chemical vapor deposition method, wherein the bonding strength of the nano diamond coating and the hard alloy substrate is improved, the surface roughness is ensured, and the method has higher processing precision and service life. However, compared with the traditional diamond coating, the nano diamond coating has lower hardness, thus having poorer wear resistance and unsatisfactory effect when processing harder materials. CN 109972115B discloses a hard alloy cutter with micro-nano diamond coating and its preparation method, in the invention, the diamond coating has two layers of composite characteristics of micron coarse diamond layer as bottom layer and nano fine diamond layer as surface, and etching pretreatment is added before depositing micron diamond coating on the surface of hard alloy cutter, so that the hardness and smoothness of the coating are ensured, and the bonding strength of diamond coating and hard alloy substrate is improved. However, the coating is easy to generate fatigue cracks when subjected to periodic impact load, and the cracks penetrate through the coating to cause coating collapse and failure, so that the service life of the cutter is reduced.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a diamond coating cutter for efficiently processing a composite material, and aims to solve the problem of difficult processing of CFRP materials.
In order to achieve the technical purpose, the invention adopts the following technical scheme: a diamond coated cutter for efficiently processing a composite material comprises a milling cutter cutting part and a milling cutter handle part, wherein the milling cutter cutting part comprises an end surface part and a peripheral edge part;
the end face part comprises an end face chip flute, an end edge and an end edge chip flute;
The peripheral edge part comprises a plurality of peripheral edges uniformly distributed on the circumference, the peripheral edge comprises a plurality of peripheral edge micro-edges and a plurality of spiral chip-breaking grooves, and the spiral chip-breaking grooves and the peripheral edge micro-edges are staggered; chip grooves are formed between two adjacent peripheral edges, the chip grooves are straight grooves, and the spiral chip breaking grooves are communicated with the chip grooves;
And the outlet of the end blade chip flute is communicated with the chip flute.
Further, the number of the end face chip flutes is 2, the 2 end face chip flutes are rotationally symmetrical at 180 degrees about the center point of the end face, and the 2 end face chip flutes are parallel.
Further, the end edge rake angle is α1=0° to 8 °.
Further, the rake angle α4=8° to 24 ° of the peripheral-blade micro blade.
Further, the helix angle theta 1 of the spiral chip breaker is=45-56 degrees, and the groove bottom is a round groove.
Further, the total length of the milling tool is L1, the step length of the peripheral edge portion is L2, and the length of the peripheral edge is L3, L3< L2< L1.
Further, the end portion and the peripheral edge portion are connected by a chamfer of c=0.15 mm, the chamfer being at a relief angle of 12 °.
Further, the milling tool adopts hard alloy, and the surface of a hard alloy matrix is coated with a composite diamond coating.
Further, the composite diamond coating comprises a top fine grain layer, a bulk layer and a bottom coarse grain layer.
Further, the main body layer comprises a plurality of nano fine crystal layers and a plurality of micro coarse crystal layers, the nano fine crystal layers and the micro coarse crystal layers are stacked and staggered, the uppermost layer of the main body layer is the nano fine crystal layer, and the lowermost layer is the micro coarse crystal layer.
In summary, the present invention achieves the following technical effects:
1. The chip groove of the milling cutter adopts a straight groove design, micro blades distributed on the peripheral blade are orthogonal to the orientation of the CFRP material in the milling process, and have the largest cutting component in the radial direction, and the intermittent cutting can generate an effective cutting effect on the carbon fiber filament shape by combining the large-angle unequal spiral chip groove staggered with the peripheral blade, so that periodic tremble caused by incomplete chip breaking is reduced;
2. according to the invention, as the spiral angle of the chip removal groove is designed to be 0 degrees, the axial direction of the cutter is hardly influenced by external force during side milling, the cutting stability is further improved, the defects of burrs, layering, saw teeth and the like are effectively inhibited, the surface condition of a workpiece is obviously improved, and the service life of the cutter is prolonged;
3. The surface of the cutter is also coated with the composite diamond coating, and the periodic micro-nano diamond layer can effectively inhibit longitudinal expansion of cracks while ensuring the bonding strength and wear resistance of the coating and a matrix, so that the service performance of the cutter under periodic impact load is obviously improved, and the service life of the cutter is further prolonged.
Drawings
FIG. 1 is a schematic view of a diamond coated tool according to an embodiment of the present invention;
FIG. 2 is a front view of a diamond coated tool;
FIG. 3 is a top view of a diamond coated tool;
FIG. 4 is an enlarged partial view of the end blade section;
FIG. 5 is an enlarged view of a portion of the end edge clearance;
FIG. 6 is a schematic view of section A-A at a depth of 0.4 mm;
FIG. 7 is an enlarged view of a portion of the junction of the end edge and the peripheral edge at B;
fig. 8 is a schematic view of a composite diamond coating structure.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
Example 1:
A diamond coated tool for efficient machining of composite materials, shown in fig. 1 as a schematic view of the tool structure and fig. 2 as a front view of the tool, comprises a milling cutter cutting portion comprising an end face portion 1 and a peripheral edge portion 2, and a milling cutter shank portion 3.
The end face portion 1 comprises an end face chip flute 11, an end edge 12 and an end edge chip flute 13.
In this embodiment, the cutter diameter is d1=8mm, the cutter edge diameter is d2=8mm, and the number of edges t=8.
As shown in fig. 3, in the top view of the cutter, 2 end face chip flutes 11 are provided, 2 end face chip flutes 11 are rotationally symmetrical by 180 degrees at the center point of the end face, and 2 end face chip flutes 11 are arranged in parallel and are used for accommodating scraps on the end face and preventing the scraps from accumulating on the end face to affect processing.
The width of the end face chip flute 11 is L4, the length of the end face chip flute 11 is L5, the distance between the end face chip flutes 11 is L8, in this embodiment, l4=2.18 mm, l5=4.2 mm, l8=0.51 mm, the depth is 0.2mm, and the inclination angles of both sides are 30 °.
As shown in fig. 3, the end edges 12 are circumferentially uniformly distributed, in this embodiment, the number of the end edges 12 is 8, in combination with the partial enlarged view of the end edge section of fig. 4, the end edge second relief angle α3=12° to 25 °, in this embodiment α3=21°, the end edge rake angle α1, the end edge first relief angle α2, and the end edge first relief angle width W1, wherein α1=0° to 8 °, in this embodiment α1=0°, the end edge collapse is prevented by adopting a small angle rake angle α1 to design the enhanced edge portion strength, the overall cutting stability of the cutter is improved, α2=8 °, w1=0.53 mm, and in combination with fig. 3, the end edge left-right deviation l6=0.15 mm, the end edge up-down deviation l7=1.1 mm, and the long tooth edge over-center. As shown in fig. 2, the butterfly angle β1=3° of the end blade.
As shown in fig. 3, the end edge chip flute 13 includes an end edge long tooth chip flute and an end edge short tooth chip flute, the end edge long tooth chip flute has a depth L13, the end edge short tooth chip flute has a depth L14, and the end edge chip flute has a spread angle γ1. As shown in fig. 5, which is an enlarged view of the end edge clearance, the end edge chip flute angle γ1=45°, l13=1.56 mm, l14=1.17 mm. The depth of the long tooth gap depth (end edge long tooth chip pocket depth L13) and the depth of the short tooth gap depth (end edge short tooth chip pocket depth L14) are large, the angle of the spreading angle gamma 1 of the end edge chip pocket is large, and meanwhile, CFRP powder scraps can be effectively removed when the end edge chip pocket 13 is matched with the end face parallel chip pocket 11 with the end edge second relief angle alpha 3 with a large angle, so that accumulated scraps are prevented from accumulating and wearing a cutter face.
As shown in fig. 1, the peripheral edge portion 2 includes a plurality of peripheral edges uniformly distributed circumferentially, the peripheral edges include a plurality of peripheral edge micro-blades 21 and a plurality of spiral chip-breaking grooves 22, the spiral chip-breaking grooves 22 are staggered with the peripheral edge micro-blades 21, one edge formed by the staggered arrangement is a peripheral edge, and the peripheral edge extends and is arranged along the length direction of the cutter.
As shown in fig. 2, the end face portion 1 and the peripheral edge portion 2 are connected by a chamfer of c=0.15 mm, the chamfer being at a relief angle of 12 °.
The length l3=32mm of the peripheral edge, as shown in fig. 6, is a schematic view of a section A-A of the position with depth of 0.4mm, the rake angle α4=8° to 24 ° of the micro-edge 21 of the peripheral edge, 18 ° is selected in this embodiment, the rake angle α4 is larger in this embodiment, so that larger shearing force can be generated on the carbon fiber material, the first relief angle α5=8°, the second relief angle α6=18°, the first relief angle width w2=0.53 mm, and the second relief angle width w3=0.75 mm. The larger rake angle alpha 4 of the cutting micro blade can ensure that the surface of the workpiece has no defects such as burrs, layering and the like.
The helix angle θ1=45° to 56 ° of the helical chipbreaker groove 22 is a circular groove. As shown in fig. 7, which is an enlarged view of a portion of the junction between the end edge and the peripheral edge in fig. 2, it can be seen that the distance between the spiral chip breaker 22 and the end face is L9, the width of the spiral chip breaker 22 is L10, the depth of the spiral chip breaker 22 is L11, the pitch of the spiral line of the spiral chip breaker 22 is L12, in this embodiment, l9=1.03 mm, l10=0.63 mm, l11=0.3 mm, l12=a i (i=1, 2, 3..n), n is a positive integer, and 1.2mm is equal to or less than a i is equal to or less than 1.8mm, in this embodiment, l12=1.45 mm, that is, a i is equal to a value, and the value of the number of grooves n is selected according to practical situations, in this embodiment, the number of grooves n=12, that is, the number of spiral chip breakers 22 is 12, of course, may be 8, 24, etc.
As can be seen from fig. 2, chip grooves 23 are arranged between two adjacent peripheral edges, the chip grooves 23 are straight grooves, the spiral chip breaker grooves 22 are communicated with the chip grooves 23, and the outlets of the end edge chip grooves 13 are communicated with the chip grooves 23, so that waste chips can be conveniently discharged, and the resistance in the flowing process is reduced.
The chip removal groove 23 is a straight groove, namely the angle of the spiral angle is 0 degrees, provides the maximum radial cutting force for the cutting micro-blade, can rapidly cut off the carbon fiber filaments, and can inhibit tremble caused by incomplete broken filaments. The chip groove used at present is designed into a spiral groove or is designed into a chip breaking groove, the radial cutting force of a cutter on CFRP is reduced, and chip breaking capacity is reduced by the design of the spiral groove.
As shown in fig. 2, the total length of the milling tool is L1, the step length of the peripheral edge portion 2 is L2, the length of the peripheral edge is L3, and L3< L2< L1. In this example, l1=75 mm, l2=36 mm, l3=32 mm.
Compared with other tools, the cutting tool has good chip removal performance, solves the problem of cutter tremble during machining, improves the quality of a machined surface of a workpiece, and prolongs the service life of the cutter.
In addition, the milling tool of the present invention adopts cemented carbide, and as shown in fig. 4, the surface of the cemented carbide substrate is coated with a composite diamond coating 4.
The composite diamond coating 4 is composed of a top fine grain layer 41, a bulk layer 42 and a bottom coarse grain layer 43.
Specifically, the main body layer 42 includes a plurality of nano fine crystal layers 42a and a plurality of micro coarse crystal layers 42b, the nano fine crystal layers 42a and the micro coarse crystal layers 42b are stacked and staggered, and the uppermost layer of the main body layer 42 is the nano fine crystal layer 42a, and the lowermost layer is the micro coarse crystal layer 42b.
The hard alloy matrix can be made of the following materials: cemented tungsten carbide, cemented titanium carbide, cemented chromium carbide, preferably cemented tungsten carbide.
The thickness of the top fine crystal layer 41 is 1-2 um, and the size of diamond grains is 50-300 nm; the main body layer 41 is formed by periodically laminating a nano fine crystal layer 42a and a micron coarse crystal layer 42b, the overall thickness of the coating is 2-10 um, the modulation period number P is more than or equal to 2, wherein the thickness of the nano fine crystal layer 42a is 0.2-2 um, the diamond grain size of the nano fine crystal layer is 50-300 nm, the thickness of the micron coarse crystal layer 42b is 0.2-2 um, and the diamond grain size of the micron coarse crystal layer is 1-5 um; the thickness of the bottom coarse-grain layer 43 is 2-4 um, and the size of diamond grains is 1-5 um.
In this embodiment, the thickness h1=1um of the top fine grain layer 41 in the composite diamond coating, the thickness h2=8um of the main body layer 42 in the composite diamond coating, the thickness h3=4um of the bottom coarse grain layer 3 in the composite diamond coating, the thickness h4=0.5 um of the micron coarse grain layer 42a in the main body layer 42 of the composite diamond coating, the thickness h5=0.5 um of the micron coarse grain layer 42b in the main body layer 42 of the composite diamond coating, and the overall thickness h6=13 um of the composite diamond coating; the micro-nano modulation cycle number P=8 in the composite diamond coating main body layer; coarse-grain layer grain size g2=1 to 3um, fine-grain layer grain size g1=50 to 100nm.
The nano fine crystal layer on the top layer of the composite diamond coating can provide higher coating hardness, processing precision and surface quality; the bottom micron coarse-grain layer ensures the bonding strength between the coating and the matrix and prevents the integral peeling failure between the coating and the matrix; the middle main body layer adopts a periodical micro-nano composite diamond layer, so that the hardness and wear resistance are ensured, the energy of cracks passing through layers is increased, the longitudinal growth of the cracks is hindered, the service life of the cutter is further prolonged, and even if tremble occurs during cutting or a larger periodical impact load is applied, the cracks growing longitudinally can not immediately extend to a coating interface, but transversely extend layer by layer along the composite layers, and the overall performance of the coating is ensured.
Example 2:
The difference from example 1 is that: in this embodiment, the spiral chip breaker is designed with unequal portions, the pitch l12=a i (i=1, 2, 3..n), n is a positive integer, and a 1≠a2≠a3≠...≠an.
During processing, a i may be a random unequal value, or a value that gradually increases or gradually decreases.
Because part of CFRP materials have obvious periodicity, tool tremble caused by resonance is easy to generate during cutting, and the surface machining quality and the service life of the tool are affected. The unequal interval spiral lines can effectively eliminate the overlapping of vibration periods of the cutter and the workpiece, so that cutter tremble is avoided.
Example 3:
The difference from embodiment 1 or embodiment 2 is that: the rake angle α4=21° of the peripheral-blade microblades 21 in this embodiment.
Because the magnitude of the rake angle alpha 4 of the peripheral edge micro blade 21 influences the cutting force, and the smaller alpha 4 can cause defects such as burr layering, the angle of alpha 4 is processed to be larger in the embodiment, the integrity and the integrity of the whole cutter are not influenced, the cutting force of the whole cutter can be improved, and meanwhile, the defects such as burr layering and the like are avoided.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical principles of the present invention are within the scope of the technical solutions of the present invention.
Claims (1)
1. A diamond coated tool for efficient machining of composite materials, characterized by: comprises a milling cutter cutting part and a milling cutter handle part (3), wherein the milling cutter cutting part comprises an end surface part (1) and a peripheral edge part (2); the end face part (1) comprises an end face chip flute (11), an end edge (12) and an end edge chip flute (13); the end edge chip flute (13) comprises an end edge long tooth chip flute and an end edge short tooth chip flute; the peripheral edge part (2) comprises a plurality of peripheral edges uniformly distributed on the circumference, the peripheral edges comprise a plurality of peripheral edge micro-edges (21) and a plurality of spiral chip-breaking grooves (22), and the spiral chip-breaking grooves (22) are staggered with the peripheral edge micro-edges (21); chip grooves (23) are formed between two adjacent peripheral edges, the chip grooves (23) are straight grooves, and the spiral chip breaking grooves (22) are communicated with the chip grooves (23); the outlet of the end edge chip flute (13) is communicated with the chip removal groove (23); 2 end face chip flutes (11) are arranged, the 2 end face chip flutes (11) are rotationally symmetrical at 180 degrees of the center point of the end face, and the 2 end face chip flutes (11) are parallel; the front angle of the end blade (12) is alpha 1 = 0-8 degrees; the front angle alpha 4 = 8-24 degrees of the peripheral micro blade (21); the helix angle theta 1 of the spiral chip breaker groove (22) is 45-56 degrees, and the groove bottom is a circular groove; the total length of the cutter is L1, the step length of the peripheral edge part (2) is L2, and the length of the peripheral edge is L3, wherein L3 is less than L2 and less than L1; the end face part (1) is connected with the peripheral edge part (2) by a chamfer angle of C=0.15 mm, and the back angle of the chamfer angle is 12 degrees; the cutter adopts hard alloy, and the surface of the hard alloy is coated with a composite diamond coating (4); the composite diamond coating (4) comprises a top fine-grain layer (41), a main body layer (42) and a bottom coarse-grain layer (43); the main body layer (42) comprises a plurality of nano fine crystal layers (42 a) and a plurality of micro coarse crystal layers (42 b), the nano fine crystal layers (42 a) and the micro coarse crystal layers (42 b) are stacked and staggered, the uppermost layer of the main body layer (42) is the nano fine crystal layer (42 a), and the lowermost layer is the micro coarse crystal layer (42 b);
The diameter of the cutter is selected to be d1=8mm, the diameter of the cutter blade is selected to be d2=8mm, and the number of blades T=8;
the width of the end face chip flute (11) is L4, the length of the end face chip flute (11) is L5, the distance between the end face chip flutes (11) is L8, L4=2.18 mm, L5=4.2 mm, L8=0.51 mm, the depth is 0.2mm, and the inclination angles of the two sides are 30 degrees;
The number of the end blades (12) is 8, the end blade second relief angle alpha 3 = 21 degrees of the end blades (12), the end blade first relief angle alpha 2 = 8 degrees, the end blade first relief angle width W1 = 0.53mm, the end blade left-right deviation L6 = 0.15mm, the end blade up-down deviation L7 = 1.1mm, and the end blade butterfly angle beta 1 = 3 degrees;
end edge long tooth flute depth L13, end edge short tooth flute depth L14, end edge flute spread angle γ1, γ1=45°, l13=1.56 mm, l14=1.17 mm;
A first relief angle α5=8° of the peripheral-edge micro-blade (21), a second relief angle α6=18° of the peripheral-edge micro-blade (21), a first relief angle width w2=0.53 mm of the peripheral-edge micro-blade (21), and a second relief angle width w3=0.75 mm of the peripheral-edge micro-blade (21);
The distance between the spiral chip breaker groove (22) and the shortest part of the end surface is L9, the width of the spiral chip breaker groove (22) is L10, the depth of the spiral chip breaker groove (22) is L11, the spiral line spacing of the spiral chip breaker groove (22) is L12, L9=1.03 mm, L10=0.63 mm, L11=0.3 mm and L12=1.45 mm;
L1＝75mm，L2＝36mm，L3＝32mm；
The thickness H1=1um of the top fine crystal layer (41) in the composite diamond coating, the thickness H2=8um of the main body layer (42) in the composite diamond coating, the thickness H3=4um of the bottom coarse crystal layer (43) in the composite diamond coating, the thickness H24=0.5 um of the nanometer fine crystal layer (42 a) in the main body layer (42) of the composite diamond coating, the thickness H5=0.5 um of the micrometer coarse crystal layer (42 b) in the main body layer (42) of the composite diamond coating, and the overall thickness H6=13 um of the composite diamond coating; the micro-nano modulation cycle number P=8 in the composite diamond coating main body layer; the grain size of the diamond of the micron coarse-grain layer is G2=1-3 um, and the grain size of the diamond of the nanometer fine-grain layer is G1=50-100 nm.
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