CN105563665A - Diamond coating cutter, and preparation method and application thereof in high speed graphite processing - Google Patents
Diamond coating cutter, and preparation method and application thereof in high speed graphite processing Download PDFInfo
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- CN105563665A CN105563665A CN201510929588.3A CN201510929588A CN105563665A CN 105563665 A CN105563665 A CN 105563665A CN 201510929588 A CN201510929588 A CN 201510929588A CN 105563665 A CN105563665 A CN 105563665A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
- B28D1/186—Tools therefor, e.g. having exchangeable cutter bits
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/26—Deposition of carbon only
- C23C16/27—Diamond only
- C23C16/271—Diamond only using hot filaments
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Abstract
The invention discloses a diamond coating cutter, and a preparation method and the application thereof in high speed graphite processing. The diamond coating cutter comprises a cutter tip, a blade and a clamping cutter holder, wherein the clamping cutter holder is made of a hard alloy matrix, the cutter tip and the blade are coated with diamond coatings on matrix materials, the diamond coating cutter is characterized in that the end cutting edge front angle gamma o1 of the blade is 2 to 6 degrees, the end cutting edge rear angle alpha 1 is 5 to 13 degrees, the peripheral cutting edge front angle gamma o2 is 5 to 15 degrees, the peripheral cutting edge rear angle alpha 2 is 10 to 14 degrees, and the helical angle beta is 15 to 45 degrees. The diamond coating cutter provided by the invention has the characteristics of high hardness, wear resistance, low friction coefficient, good heat conduction and the like, is suitable for high speed graphite processing, can effectively overcome frictional wear caused by graphite dust to the surface of the cutter, and is classified as an ideal cutter for cutting graphite.
Description
Technical field
The present invention relates to field of machining, be specially a kind of diamond-coated tools, its preparation method and the application in graphite High-speed machining thereof.
Background technology
Isotropism cold isostatic pressing formed graphite has the mechanical and physical performance than common die-pressed graphite excellence, and its particle does not have the abilities such as preferred orientation therefore intensity and conduction all consistent in all directions, is that the world today develops one of industrial materials the most rapidly.Isotropic graphite has higher elevated temperature strength, low thermal coefficient of expansion, preferably machinability and good heat, electrical conductivity, heat-resisting quantity, stable chemical performance, plasticity, the advantages such as good thermal shock.Be widely used in mould EDM spark discharge, solar energy graphite field, metallurgy, machinery, building, electrically, electronics, Aero-Space, nuclear industry, coloured and noble metal is industrial, glass and quartz industry, semiconductor and the field such as optoelectronics industry chemical industry and environmental project.Compared with copper, graphite electrode has that intensity is high, thermal deformation and the advantage such as consumption of electrode is little, and be suitable for the electrode with complex-shaped surface mould structures such as minute aperture, thin-walled and fins, graphite electrode just progressively replaces copper electrode becomes spark machined main flow.As the spark machined user in the U.S. more than 96% selects graphite to make electrode material, in other industrially developed country as countries such as Japan and Switzerland, graphite also occupies main status in electrode material for electric discharge machining.
Graphite is typical layered structure fragile material, and mechanical strength is poor, adds and easily collapses broken man-hour, and tool wear is serious, is typical difficult-to-machine material.The graphite parts can only processing simple shape processed by conventional car, milling, mill, cannot meet the requirement of various complicated shape electrode.High-speed milling has that process velocity is high, cutting force is little, temperature is low and the feature such as workpiece surface quality is good, and may be used for the electrode of manufacturing complex shapes, is one of main machining method of accurate complicated graphite electrode.
There is the microscopic defects such as the tissue defects of pore, crackle and granule boundary in heterogeneous body graphite inside, is the typical nonmetal fragility friable material of one.Produce in working angles and finely collapse the chip of flour dirt, easy bonding is deposited on front and rear knife face and machined surface, violent friction and impact are produced to cutting edge, causes the even tipping inefficacy of cutter generation early damage, Fast Wearing, cutting force after tool wear passivation, can be caused sharply to rise.Fragility graphite easily collapses angle when impacting by cutting force, collapses limit even brittle fracture and scrap phenomenon.Tool wear not only increases processing cost, and causes the surface quality and the dimensional accuracy that are difficult to guarantee workpiece, and usually, cutter accounts for more than 1/3 of machining graphite totle drilling cost.So reduce tool wear to improve working (machining) efficiency and workpiece quality, become the problem that graphite machining needs solution badly.
Graphite bite has hard alloy cutter, carbide alloy coating cutter, polycrystal diamond cutter etc.During hard alloy cutter high-speed milling graphite, tool wear is serious, and during TiAlN coated cutting tool processing graphite, the life-span has no and significantly improves.Less but the shape of tool of polycrystal diamond cutter wearing and tearing is difficult to meet complicated electrode requirement.Diamond-coated tools have high hardness and wearability, low-friction coefficient, high elastic modulus, high thermal conductance, low thermal coefficient of expansion and with the advantage such as nonferrous metal affinity is little.May be used for the Precision Machining of machining of non-metallic hard brittle material as graphite, high abrasion resisting material, composite, silumin and other toughness nonferrous materials.
There is the relevant report of many sections of diamond-coated tools abroad, but mainly towards pottery, printed substrate, non ferrous metal and their alloy, engineering plastics, non-metal stupalith, Al
2o
3the difficult-to-machine material such as floor and SiCp/Al is processed, and about development diamond-coated tools, also application is fewer with the bibliographical information of processing graphite aspect.As Yan Guoxiang, " diamond-coated tools and the application in fibrous composite processing thereof " patent CN102211218B that Shen Fenglei writes, relate to a kind of diamond-coated tools and the cutter for the composite processing such as carbon fiber or glass fibre thereof, this cutter is not suitable for machining graphite." a kind of preparation method of diamond-coated tools and the application of the method gained diamond-coated tools in printed substrate preparation " patent CN103397314A that Wang Tao writes, invention diamond-coated tools is in the application in printed substrate." nano diamond coating cutter and the application in oral restoration Ceramic manufacturing thereof " patent CN103770223A that Yan Guoxiang writes, invention relates to a kind of nano diamond coating cutter and the application in oral restoration Ceramic manufacturing thereof.G.P. " diamond-coated tools and preparation method thereof " patent CN1136292A that lattice granny rag etc. are write describes the preparation method of diamond coatings blade, and this cutter is also not suitable for manufacturing complex shapes graphite." diamond-coated tools is to the processing method of precise and fine graphite electrodes " patent CN201010234411.9 that Zhang Tai writes relates to the processing method of a kind of diamond-coated tools to precise and fine graphite electrodes, mainly have studied Cutting Process parameter, do not relate to the contents such as graphite cutting-tool angle optimization.
During current graphite High-speed machining, Some Enterprises also selects the universal diamond-coated tools in cutter market, due to the diamond-coated tools selected and non-expert design for graphite material High-speed machining characteristic, due to shear blade anterior angle, the relief angle of designed cutter, rake angle, relief angle, and helix angle is difficult to meet graphite material processing particular/special requirement.Frequently occur that diamond-coated tools most surfaces is intact when there is diamond-coated tools High-speed machining graphite in actual use procedure, but occurred wearing and tearing, disrepair phenomenon in advance at point of a knife or other position of cutting edge.The unreasonable graphite workpiece accuracy causing processing of coated cutting tool angle design declines, and whole cutter is scrapped in advance and produce huge waste.Relevant development graphite High-speed machining special diamond coated cutting tool is also under test at present, and in tool matrix material, cutting-tool angle result and coating process, maturation causes expensive not enough.Select the cutter material of appropriate graphite processing, cutter structure and angle, improve the machinability of cutter life and raising graphite machining, current Patents and bibliographical information are very few.
In sum, special at present to develop diamond-coated tools report for graphite high-speed cutting processing very few, and widely used in machining graphite field is not ordinary rigid alloy cutter, not the special dedicated tool designed for machining graphite characteristic.During hard alloy cutter high-speed milling graphite, tool wear is serious, need check tool wear situation in time and frequently change cutter, in large scale or accurate electrode machining, application is limited, during TiAlN coated cutting tool processing graphite, the life-span has no and significantly improves, polycrystal diamond cutter wearing and tearing are less, but the shape of tool is difficult to meet complicated electrode requirement.For graphite cutter, design suitable geometric angle, contribute to reducing cutting-impact and vibration, graphite workpiece in process is avoided to collapse broken, the selection of cutting-tool angle simultaneously has direct impact to cutting force, cutting vibration and tool wear, so it is angularly significant to design suitable tool orthogonal rake, relief angle, helical angle.The optimization of cutter can realize shortening the electrode manufacturing cycle, and the improving product market competitiveness, has material impact to whole graphite product manufacturing.
Summary of the invention
The object of the present invention is to provide diamond-coated tools, its preparation method and application, consider the impact of tool wear, cutting force and vibration, by optimizing the geometric angle of cutting tool, improving the overall cutting ability of cutter.
The invention discloses diamond-coated tools, comprise cutting tips, blade and clamping handle of a knife, clamping handle of a knife is hard alloy substrate, and cutting tips and blade are coated with diamond coatings on matrix material, the shear blade anterior angle γ o of blade
1be 2 ° ~ 6 °, shear blade relief angle α
1be 5 ° ~ 13 °, rake angle γ o
2be 5 ° ~ 15 °, all edge clearance angle α
2be 10 ° ~ 14 °, helixangleβ is 15 ° ~ 45 °.
Further, described cutting tips and the matrix material of blade are Talide, and wherein the mass percentage of cobalt is no more than 6%; Vanadium carbide or titanium carbide or other mixture ratio be not higher than 1%.
Further, the thickness of described diamond coatings is 7 ~ 20 μm.
Wherein, described cutting tips is provided with some dust chip areas in cutting direction.
Preferably, the shear blade anterior angle γ o of described blade
1be 4 °, shear blade relief angle α
1be 9 °, rake angle γ o
2be 10 °, all edge clearance angle α
2be 14 °, helixangleβ is 30 °.
Preferably, the roughness <0.8 of described blade.
The invention also discloses the preparation method of diamond-coated tools, comprise the following steps:
S1. the carbide alloy of appropriate graphite processing is selected: choose Talide, wherein be no more than 6% containing cobalt amount, wherein the mixture ratio such as vanadium carbide or titanium carbide is not higher than 1%, only allow the extremely additive such as trace iron Fe, vanadium Va, nickel, chromium Cr, the particle diameter of material is between 0.5 ~ 2 μm, hardness HRA92 ~ 93;
S2. carbide alloy bar is shaping: it is cylindrical shell that the material chosen by step S1 adds extruded in bar forming machine;
S3. cylindrical shell processing: use five axle high-precision numerical control grinding centers to grind blade and cutting tips, the shear blade anterior angle γ o1 of blade is 2 ° ~ 6 °, shear blade relief angle α 1 is 5 ° ~ 13 °, rake angle γ o2 is 5 ° ~ 15 °, and all edge clearance angle α 2 are 10 ° ~ 14 ° helixangleβs is 15 ° ~ 45 °;
S4. coating pretreatment: use acid solution pickling removal and passivation cobalt, then clean in ultrasonic wave with aqueous alkali, final drying;
S5. HF CVD film forming: in the cavity of forvacuum, hydrocarbon gas and hydrogen are by the cracking of high temperature heated filament, and on the tool matrix that step S4 process obtains, deposit thickness is the diamond thin of 7 ~ 20 μm.
Wherein, the temperature 1800 DEG C ~ 2000 DEG C of HF CVD in step S5, the temperature of hard alloy substrate controls at 800 DEG C ~ 1000 DEG C.
The invention also discloses the application of diamond-coated tools, described diamond-coated tools is applied in graphite High-speed machining.Described graphite High-speed machining is the standby isotropic graphite electrode of isostatic pressing, graphite field processing, and the feed of diamond film-coated tools is 3000 ~ 3200mm/min, the speed of mainshaft is 12000 ~ 17000rpm, radial cutting-in R
d=0.5mm, axial cutting-in A
d=2mm, employing climb cutting, cooling air mode processing.
The present invention has following beneficial effect:
1, the present invention is by arranging the geometric angle of cutter, contribute to reducing cutting-impact and vibration, graphite workpiece in process is avoided to collapse broken, the selection of cutting-tool angle simultaneously has direct impact to cutting force, cutting vibration and tool wear: when adopting shear blade anterior angle 2 ° ~ 6 °, rake angle 5 ° ~ 15 ° of processing graphites, cutting edge roundness intensity is better, and performance that is shock-resistant and friction is good.Shear blade relief angle 5 ° ~ 13 °, all edge clearance angles 10 ° ~ 14 °, ensure that cutting edge roundness intensity and cutting vibration stability.Adopt comparatively low pitch angle 15 ° ~ 45 ° time, same cutting edge is cut graphite workpiece simultaneously, improve Tool in Cutting efficiency, and tool wear, cutting force and impulsive force is within cutter tolerance range.Depart from the degree of surface of the work greatly according to crossing large helix angle resultant tool force direction, because graphite collapses broken, cutting-impact that is that cause aggravates, thus causes tool wear, Milling Force and cutting vibration to increase.The present invention considers the impact of tool wear, cutting force and vibration, is tested by design science rational factor, optimizes the anterior angle to the shear blade of graphite cutting tool and Zhou Ren, relief angle and helical angle geometric angle, improves the overall cutting ability of cutter.
2, diamond film-coated tools hardness ratio TiAlN (2600 ~ 2800HV) of the present invention and CBN (3400 ~ 4500HV) all high, high case hardness makes diamond-coated tools very easily cut hard crisp graphite, and effectively can overcome the fretting wear of graphite dust to tool surface.Coefficient of friction I subtracts and reduces cutting force and cutting temperature, avoids diamond-coated tools in oxidation or graphitization, can obtain high manufacturing accuracy and machined surface quality.
3, under cutter room temperature of the present invention, thermal conductivity factor is higher than ordinary rigid alloy cutter thermal conductivity factor, and good heat conductivility makes diamond-coated tools derive heat in metal cutting rapidly, and tool surface temperature is not substantially by the impact of cutting temperature.Elastic modulus E exceeds half than inserted tool, makes cutter have good cutting ability.The features such as it is high, wear-resistant that diamond thin has hardness, and coefficient of friction is little, and thermal conductivity is good manufacture to cut graphite ideal material.
Accompanying drawing explanation
Fig. 1 is perspective view of the present invention.
Fig. 2 is the B place enlarged diagram of Fig. 1.
Fig. 3 is schematic front view of the present invention.
Fig. 4 is the A-A generalized section of Fig. 3.
Fig. 5 is the C place enlarged diagram of Fig. 3.
Fig. 6 is the surface topography that ESEM takes the blade of cutter of the present invention.
Fig. 7 is the cross-sectional morphology that ESEM takes the blade of cutter of the present invention.
Fig. 8 is the diamond thin power spectrum at the A place of cutter of the present invention in Fig. 7.
Fig. 9 is tool sharpening graphite rear surface of the present invention microstructure.
Primary clustering symbol description:
1: cutting tips, 2: blade, 3: clamping handle of a knife, 4: dust chip area
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.
As shown in Figure 1 and Figure 2, the invention discloses a kind of diamond-coated tools, comprise cutting tips 1, blade 2 and clamping handle of a knife 3, clamping handle of a knife 3 is hard alloy substrate, and cutting tips 1 and blade 2 are coated with diamond coatings on matrix material.The matrix material of cutting tips 1 and blade 2 is Talide, and wherein the mass percentage of cobalt is no more than 6%; Vanadium carbide or titanium carbide or other mixture ratio be not higher than 1%.The thickness of diamond coatings is 7-20 μm.Cutting tips 1 is provided with some dust chip areas 4 in cutting direction, is convenient to effectively to discharge the graphite powder cutting and formed when graphite cuts, and reduces breaking phenomenon, obviously reduces tool change time, improve working (machining) efficiency.
In the present embodiment, diamond film coating layer flat-bottom milling cutter, overall length 60mm, the long 24mm of sword, 4 teeth, cutting tip diameter 6mm.Head diameter 2-10mm, specifically can be 2mm, the sizes such as 4mm, 6mm, 8mm, 10mm, and as head diameter≤4mm, shank diameter is 4mm; As head diameter > 4mm, shank diameter is identical with head diameter.Cutting edge keeps sharp, and rake face is smooth, does not allow jagged, spring corner saw tooth, ripple etc. to affect familiar lacunas.Bottom land is smooth, smooth, has not allowed the substrate imperfection such as tool marks, oscillation mark, burnt burn.The roughness Ra <0.8 of blade.The roughness of remainder is 0.8.
As seen in figures 3-5, the shear blade anterior angle γ o of blade
1be 2 ° ~ 6 °, shear blade relief angle α
1be 5 ° ~ 13 °, rake angle γ o
2be 5 ° ~ 15 °, all edge clearance angle α
2be 10 ° ~ 14 °, helixangleβ is 15 ° ~ 45 °.By table 1, three groups of cutting-tool angles are set.
Table 1.#1 ~ #3 cutting-tool angle parameter
| Sequence number | Shear blade anterior angle γ o 1 | Shear blade relief angle α 1 | Rake angle γ o 2 | Week edge clearance angle α 2 | Helixangleβ |
| #1 | 2° | 5° | 5° | 10° | 15° |
| #2 | 4° | 9° | 10° | 14° | 30° |
| #3 | 6° | 13° | 15° | 14° | 45° |
The setting of shear blade anterior angle of the present invention, rake angle makes cutting edge roundness intensity better, and performance that is shock-resistant and friction is good.The setting of shear blade relief angle, all edge clearance angles ensure that cutting edge roundness intensity and cutting vibration stability.Improve Tool in Cutting efficiency when the setting of helical angle makes same cutting edge to be cut simultaneously graphite workpiece, and tool wear, cutting force and impulsive force are within cutter tolerance range.
Just the preparation process of coated cutting tool of the present invention does specific description below.
S1. the carbide alloy of appropriate graphite processing is selected: choose Talide, wherein be no more than 6% containing cobalt amount, wherein the mixture ratio such as vanadium carbide or titanium carbide (VC, TiC) is not higher than 1%, only allow the extremely additive such as trace iron Fe, vanadium Va, nickel, chromium Cr, the particle diameter of material is between 0.5 ~ 2 μm, hardness HRA92 ~ 93.Cutter material is very large for the impact of working (machining) efficiency, crudy, processing cost and tool life.Cutter material is harder, and its wearability is better, and hardness is higher, and impact flexibility is lower, and material is more crisp.For diamond coatings graphite cutter, in selection, hardness height suitably can be selected slightly low containing cobalt amount.
S2. carbide alloy bar is shaping: it is cylindrical shell that the material chosen by step S1 adds extruded in bar forming machine.
S3. cylindrical shell processing: use five axle high-precision numerical control grinding centers to grind blade and cutting tips, the shear blade anterior angle γ o1 of blade, shear blade relief angle α 1, rake angle γ o2, all edge clearance angle α 2, helixangleβ is by upper table 1 parameter processing preparation.
S4. coating pretreatment: use acid solution pickling removal and passivation cobalt, then clean in ultrasonic wave with aqueous alkali, final drying.
S5. HF CVD film forming: in the cavity of forvacuum, hydrocarbon gas and hydrogen are by the cracking of high temperature heated filament, and on the tool matrix that step S4 process obtains, deposit thickness is the diamond thin of 7 ~ 20 μm.The temperature of HF CVD 1800 DEG C ~ 2000 DEG C, the temperature of hard alloy substrate controls at 800 DEG C ~ 1000 DEG C.
The cutting performance adopting above-mentioned preparation method to obtain is if following table 2 is as shown:
The performance parameter of table 2.1# ~ 3# cutter
As seen from the above table, through the cutter that the present invention prepares, under room temperature, thermal conductivity factor significantly improves that (hard alloy cutter thermal conductivity factor is only 80 ~ 100.m
-1.K
-1).Good heat conductivility makes diamond-coated tools derive heat in metal cutting rapidly, and tool surface temperature is not substantially by the impact of cutting temperature.Elastic modulus E, exceeds half than inserted tool, makes cutter have good cutting ability.Hardness ratio TiAlN (2600 ~ 2800HV) and the CBN (3400 ~ 4500HV) of cutter of the present invention are high, high case hardness makes diamond-coated tools very easily cut hard crisp graphite, and effectively can overcome the fretting wear of graphite dust to tool surface.Coefficient of friction I subtracts and reduces cutting force and cutting temperature, avoids diamond-coated tools in oxidation or graphitization, can obtain high manufacturing accuracy and machined surface quality.
Fig. 6 is tool surface diamond pattern after coating, and it is column diamond particles that ESEM shows this diamond, has good physics and mechanical property.Fig. 7 is the pattern of cutter traverse cross section, and ESEM display diamond coatings thickness is about 7 μm, and hard alloy substrate and diamond combine good.ESEM power spectrum as Fig. 8 diamond-coated tools shows, is 100% pure carbon in the power spectrum in diamond cutter coat cross section.
Cutter prepared by the present invention is mainly used in the production of graphite High-speed machining, particularly in the standby isotropic graphite electrode of isostatic pressing, graphite field processing, the feed arranging diamond film-coated tools is 3000 ~ 3200mm/min, the speed of mainshaft is 12000 ~ 17000rpm, radial cutting-in R
d=0.5mm, axial cutting-in A
d=2mm, employing climb cutting, cooling air mode processing.Fig. 9 is the microstructure of 2# cutter high-speed cutting graphite surface, and as can be seen from the figure the smooth nothing of graphite surface is obviously damaged and collapse limit, ensure that the surface quality of graphite parts.Through experimental demonstration, this cutter cutter wear of the tool flank width after 500 meters of cutting strokes is 0.01mm, graphite table roughness Ra is 0.84 μm, under identical cutting machines and technological parameter condition, compare ordinary rigid alloy cutter, the diamond coatings life-span improves 3 ~ 5 times, graphite surface Quality advance 30%.
The present invention is compared with normal diamond coated cutting tool, and service life will be grown, and effectively can overcome the fretting wear of graphite dust to tool surface, and obviously can reduce process due to graphite thin-wall part and collapse angle, collapse limit even brittle fracture and scrap phenomenon.
The above, be only the present invention's preferably detailed description of the invention, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses, the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (10)
1. diamond-coated tools, comprises cutting tips, and blade and clamping handle of a knife, clamping handle of a knife is hard alloy substrate, and described cutting tips and blade are coated with diamond coatings on matrix material, it is characterized in that: the shear blade anterior angle γ o of blade
1be 2 ° ~ 6 °, shear blade relief angle α
1be 5 ° ~ 13 °, rake angle γ o
2be 5 ° ~ 15 °, all edge clearance angle α
2be 10 ° ~ 14 °, helixangleβ is 15 ° ~ 45 °.
2. diamond-coated tools as claimed in claim 1, is characterized in that: described cutting tips and the matrix material of blade are Talide, and wherein the mass percentage of cobalt is no more than 6%; Vanadium carbide or titanium carbide or other mixture ratio be not higher than 1%.
3. diamond-coated tools as claimed in claim 1 or 2, is characterized in that: the thickness of described diamond coatings is 7 ~ 20 μm.
4. diamond-coated tools as claimed in claim 1 or 2, is characterized in that: described cutting tips is provided with some dust chip areas in cutting direction.
5. diamond-coated tools as claimed in claim 1 or 2, is characterized in that: the shear blade anterior angle γ o of described blade
1be 4 °, shear blade relief angle α
1be 9 °, rake angle γ o
2be 10 °, all edge clearance angle α
2be 14 °, helixangleβ is 30 °.
6. diamond-coated tools as claimed in claim 1, is characterized in that: the roughness <0.8 of described blade.
7. the preparation method of the diamond-coated tools as described in any one of claim 1 ~ 6, is characterized in that, comprises the following steps,
S1. the carbide alloy of appropriate graphite processing is selected: choose Talide, wherein be no more than 6% containing cobalt amount, wherein the mixture ratio such as vanadium carbide or titanium carbide is not higher than 1%, only allow the extremely additive such as trace iron Fe, vanadium Va, nickel, chromium Cr, the particle diameter of material is between 0.5 ~ 2 μm, hardness HRA92 ~ 93;
S2. carbide alloy bar is shaping: it is cylindrical shell that the material chosen by step S1 adds extruded in bar forming machine;
S3. cylindrical shell processing: use five axle high-precision numerical control grinding centers to grind blade and cutting tips, the shear blade anterior angle γ o1 of blade is 2 ° ~ 6 °, shear blade relief angle α 1 is 5 ° ~ 13 °, rake angle γ o2 is 5 ° ~ 15 °, week, edge clearance angle α 2 was 10 ° ~ 14 °, and helixangleβ is 15 ° ~ 45 °;
S4. coating pretreatment: use acid solution pickling removal and passivation cobalt, then clean in ultrasonic wave with aqueous alkali, final drying;
S5. HF CVD film forming: in the cavity of forvacuum, hydrocarbon gas and hydrogen are by the cracking of high temperature heated filament, and on the tool matrix that step S4 process obtains, deposit thickness is the diamond thin of 7 ~ 20 μm.
8. the preparation method of diamond-coated tools as claimed in claim 7, is characterized in that: the temperature 1800 DEG C ~ 2000 DEG C of HF CVD in step S5, the temperature of hard alloy substrate controls at 800 DEG C ~ 1000 DEG C.
9. the application of the diamond-coated tools as described in any one of claim 1 ~ 6, is characterized in that: described diamond film-coated tools is applied in graphite High-speed machining.
10. the application of diamond-coated tools as claimed in claim 9, it is characterized in that: described graphite High-speed machining is the standby isotropic graphite electrode of isostatic pressing, graphite field processing, and the feed of diamond film-coated tools is 3000 ~ 3200mm/min, the speed of mainshaft is 12000 ~ 17000rpm, radial cutting-in R
d=0.5mm, axial cutting-in A
d=2mm, employing climb cutting, cooling air mode processing.
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| WO2020102924A1 (en) * | 2018-11-22 | 2020-05-28 | 广东工业大学 | Zirconia ceramic solid tool and manufacturing method therefor, and use of tool in graphite |
| CN109570580A (en) * | 2018-12-29 | 2019-04-05 | 深圳市金洲精工科技股份有限公司 | A kind of cutter and its manufacturing method with hard coat |
| WO2022051830A1 (en) * | 2020-09-10 | 2022-03-17 | Destinar Distribuidora Ltda | Method for manufacturing cvd diamond bits and/or tips for wear, abrasion and/or cutting of biological materials and similar |
| CN112719376A (en) * | 2020-12-18 | 2021-04-30 | 盐城福海电子有限公司 | Cutting method for silicon-aluminum alloy TR component packaging shell |
| CN112756673A (en) * | 2020-12-30 | 2021-05-07 | 西北工业大学 | TiB2Milling method of/7050 Al-based composite material |
| CN113732366A (en) * | 2021-08-26 | 2021-12-03 | 中国工程物理研究院激光聚变研究中心 | Ultrasonic vibration machining tool for inner wall of deep small hole and preparation method thereof |
| CN114101725A (en) * | 2021-10-20 | 2022-03-01 | 广东工业大学 | Heat-dissipating diamond-coated tool and manufacturing method thereof |
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