Do the research of material of cutting cutting tool

The negative effect of cutting fluid is in metallic cutting treatment, often use cutting liquid. The main effect of cutting fluid is to drop cutting temperature, the attrition that improves treatment process wears away condition, improve the exterior quality of workpiece thereby, prolong the service life of cutting tool. However, rise with what can develop consciousness continuously as social environmental protection in last few years, a series of negative effect that people already began to pay close attention to its place to bring from the whole lifecycle of cutting fluid: (1) production cost raises to increase as the twice of cutting dosage, the wastage of cutting fluid also rises considerably, consequently it makes the proportion that holds in cost also increase greatly in the spare parts. According to abroad a lot of statistic data make clear, the supply of cutting fluid and cutting fluid, maintain, reclaim the charge such as the processing that reachs cutting waste liquid adds in, 16% what hold total production cost, and 4% what the charge that cutting tool spends holds production cost only. This statistic takes seriously what analyse data to must cause people highly, in because be in,competing when the market with intense now beneficial, lower the manufacturing cost of the product and sale price, already became an enterprise to live the main factor with development. (2) fluid of cutting of serious pollution environment is a when environmental pollution causes in metallic cutting treatment main source. If emulsion contains oil not only, and contain the harmful material such as black of caustic soda, oleic acid, alcohol and phenol. If these cutting fluid emit into the outside directly without processing, can pollute land, fountainhead and air, floral of serious shadow sound of sth astir grows, destroy zoology environment, go against what can develop the strategy continuously to carry out. (3) what endanger jockey person directly is healthy the uses extensively water in be being produced at present base cutting fluid contains harmful to human body chemical part more or less. In cutting process, cutting fluid be heated volatilizes, form mist, in the workshop working area often is diffusing unpleasant peculiar smell. The lampblack that cutting fluid produces can cause a variety of diseases of worker lung and respiratory tract, direct contact can cause cutting fluid and human body a variety of dermatosis, affect the worker's health directly. Produce pollution less as far as possible to make metallic cutting is machined, people put forward " cleanness turns production " this one concept. Dry cutting is to eliminate cutting fluid pollution, reduce product cost, implementation cleanness changes the most efficient way of production. From 20 centuries 90 time begin, abroad had a large number of research to doing type cutting technology, apply at actual production, obtained certain social benefit and economic benefits, technology of dry type cutting already became metallic cutting to machine the trend of development. 3.

The difficult problem of the oldest technique that does material of cutting cutting tool to realize dry type cutting is cutting tool, he is the crucial factor that treatment of desiccate type cutting is able to go on wheels. Cutting tool is in cutting treatment process, should bear very great pressure, be out of shape as a result of the metallic plasticity of the generation when cutting at the same time and cutting tool lays in the circumstance that does not have cutting fluid, cut bits, work more intense friction will arise between mutual contact surface, the temperature that makes the generation on blade of cutting tool cutting extremely tall and get very great stress, below such condition, cutting tool will wear away quickly or damaged, because this does material of type cutting cutting tool to should have taller hear resistance and hot tenacity, good heat-resisting concussion sex, fight caking property and tall wearability. Have the fine grained hard alloy that tall tenacity and tall hardness have both commonly usedly, coating hard alloy, pottery and porcelain reachs cermet, cubic nitrogen changes boron (CBN) , get together brilliant diamond (PCD) . (1) exceed fine grained hard alloy to exceed fine grained hard alloy to have very good tenacity and hear resistance, apply to the circumstance of the horn before need is big, can use at doing the bit that uses in cutting, deep Kong Zuan. (2) coating hard alloy is on matrix hard alloy, with deposit of CVD(chemical gas phase) or the method such as PCD, the layer such as the TiC of besmear Fu wear-resisting, TiN, A1203, form exterior coating hard alloy. Germany overcame captive uncle company and Sweden 1969 the razor blade of hard alloy of TiC monolayer coating that the company develops Shanteweike first throw on the market. Ever since, world each country had development, production. China also was mastering coating skill later. Razor blade of coating hard alloy all is but dislocation form, outfit clip is used on arbor or cutter hub. Have the following advantage: Material of ① surface coating has very tall hardness and wearability, reason and not photograph of coating razor blade is compared, coating hard alloy can use higher cutting rate, or cutting tool durability can rise substantially below same cutting rate. ② coating material and be machined the coefficient of friction between material is lesser, cutting force has reason to be reduced certainly, than not coating knife film contract is reduced 5% the left and right sides. ③ uses treatment of coating razor blade, it is better to already machined exterior quality. ④ is good as a result of integral performance, coating razor blade has better versatility. The razor blade of a kind of brand often has broader suitable scope. Coating cutting tool most apply to dry cutting treatment, can bear already because of appropriate coating high cutting temperature, reduce cutting tool and cut the coefficient of friction between bits and cutting tool and workpiece surface, reduce the quantity of heat that cutting tool wears away and produces, still can make cutting tool has coriaceous matrix and the cutting blade that contented cutting asks or workpiece face. Accordingly, the coating engineering technology with appropriate matrix and coating combination and feasible economy is one of crucial techniques that dry cutting processes. The research of technology of cutting tool coating, also obtained very good result domestic and internationally. Coating cutting tool divides two kinds big: One kind is " hard " coating cutting tool, wait for coating cutting tool like TiN, TiC and Al2O3, hardness of surface of this kind of cutting tool is tall, wearability is good. Another kind is " soft " coating cutting tool, also call " self-lubricating cutting tool " , wait for coating cutting tool like MoS2, WS, the coefficient of friction of it and workpiece material is very low, have 0 only.

01 the left and right sides, can reduce cutting force and drop cutting temperature. Common only coat and much coating combination have: TiN of ／ of Al2O3 of ／ of TiN of ／ of TiCN of ／ of TiN of TiC, TiN, ／ of TiCN, TiAlN, TiC, TiC, TiC. Much coating reachs his the occurrence of relevant technology, make coating can rise to be able to have the integral performance of a variety of material again with the combinative strength of matrix already. TiC is the wear-resisting compound of a kind of tall hardness, the face wears away and the good knife after fighting fights crescent moon to wear away depression ability. The hardness of TiN is a bit low, but the affinity of it and metal is small, wetability can be good, oxidation ability is being fought in air is better than TiC. TiCN had the integral performance of TiC and TiN, tiC of its hardness prep above and TiN, because this is stuff of a kind of relatively good cutting tool coating. TiAlN is the PVD coating that contains aluminium, in cutting process aluminium oxidizes and form alumina, rise to fight thereby oxidize and fight diffuse tatty action, when high speed cutting, the TiN of cutting effect excel of TiAlN coating cutting tool and TiCN coating cutting tool, the hardness that main reason is TiAlN coating cutting tool, fight oxidize and fight felt ability tall. Have very tall high temperature hardness as a result of TiAlN coating cutting tool especially. Current, tiAlN ／ Al2O3 is multilayer PVD coating already also considered to succeed, its coating hardness amounts to HV4000, besmear number of plies is 400 (total ply 5 μ M) , cutting tool of coating of TiN of ／ of Al2O3 of ／ of TiC of cutting function excel. Developed accept rice coating again recently (Nanocoating) technology. The different combination that this kind of method can use a variety of coating data satisfies different function and function requirement, special agree with high speed does cutting. Of hard alloy cutting tool multilayer accept rice coating can divide it is 4 kinds big: Good combination of ① hard ／ , wait like TiN of ／ of TiB2 of ／ of B4C ／ SiC, TiC, TiC; Soft combination of ② hard ／ , wait like Ti of ／ of B4C ／ W, SiC ／ W, SiC; Soft combination of ③ soft ／ , cu of the ／ that be like Ni; ④ has the soft ／ soft combination of lubricant function, wait like Ta of ／ of W of ／ of MoS2 ／ Mo, WS2, TaS2. These compound coating are combined every layers by two kinds of material and become, ply is rice of a few accept only, according to cutting need, but clothe of mutual overlay besmear 100, total ply can amount to 2 ～ 5 μ M. Design reasonable accept rice coating to be able to make the hardness of cutting tool and tenacity increase significantly, make its are had fight attrition exceedingly goodly to wear away reach self-lubricating function, very agree with dry cutting. (3) the research progress that pottery and porcelain and A1203 of cutting tool of pottery and porcelain of cermet A1203 department are material of cutting tool of compound pottery and porcelain basically is centered in compound aggrandizement, fiber aggrandizement, compound add pliable but strong to fill strong, super- fine grained is compound wait for a respect, basically be with alumina department pottery and porcelain is fundamental material, wait through using vacuum hot pressing, heat static pressure wait for advanced agglomeration craft, add the part such as carbide, nitride, oxide, boride and metal compound add pliable but strong to fill strong, accept rice the measure such as particle size of compound, control, make of material of cutting tool of A1203 department pottery and porcelain rupture tenacity and bending strength had huge to rise, can amount to 7.

4MPa ／ M2, 820MPa, suitable scope also expands increasingly. The development that at present new-style A1203 is material of cutting tool of compound pottery and porcelain still is domestic and international research heat. Department pottery and porcelain applies ① A1203- carbide on tool market at present more is A1203-TiC compound pottery and porcelain, basically use at hard steel of cutting temper by dipping in water to mix all sorts of wear-resisting are cast-iron. A1203-TiC- metal fastens compound pottery and porcelain to pass join a few felt metal Ni, Mo, increased the concatenate strength of A1203 and TiC, can use at rough machining. SiC brilliant must add A1203 of pliable but strong base the applied Yi Fei of cutting tool of pottery and porcelain often succeeds, can use effectively in the working procedure such as interrupted cutting and thick car, milling and bore, comfortable at machining nickel radical alloy, tall hardness cast-iron wait for material with hard steel of temper by dipping in water. ② A1203- boride fastens A1203-TiB of pottery and porcelain to fasten material of cutting tool of compound pottery and porcelain to serve as commodity to put in the market in abroad old already, already was proved to be efficient treatment the material of ideal cutting tool of material of certain difficult treatment, its intensity, tenacity, hear resistance and wearability all material of cutting tool of excel A1203-TiC pottery and porcelain. TiB grain and A1203 have good chemical consistence and physics to match a gender, and TiC of hardness prep above, its are compound cutting tool material has wonderful impact resistance and wearability. Material of this cutting tool depends on cutting temper by dipping in water hard firm when, when cutting speed is more than L20m/min, meeting occurrence high temperature is self-lubricating function. Makings of two kinds of when pottery and porcelain of ③ A1203- Zr02 and A1203-TiCN pottery and porcelain are developing outbalance domestic and internationally new profile is A1203-Zr02(ZTA pottery and porcelain) with A1203-TiCN compound pottery and porcelain. Zr02 has taller tenacity, zr02 of photograph of brilliant of control all directions goes to the stabilizing agent that adds certain amount in Zr02 the photograph of Zr02 of monocline brilliant photograph changes, can raise A1203 pottery and porcelain rupture tenacity. Grain of TiC, TiN can nail the crackle in plunging into matrix, prevent the growth of source crackle, raise function of the hardness of A1203 pottery and porcelain, thermal shock and thermal conductivity. Material of these two kinds of cutting tool suits hard steel of cutting temper by dipping in water particularly because of superior wear-resisting caustic ability, and material of A1203-TiCN compound pottery and porcelain is having higher wear-resisting caustic capacity. Nitrogen changes nitrogen of silicon radical pottery and porcelain to change silicon radical pottery and porcelain is 20 centuries the material of new cutting tool that 70 time appear, it is raw material with the Si3N4 powder of tall purity, add the agglomeration such as the agglomeration agent such as Y203, MgO, Zr02 and HfO2 or wear-resisting photograph A1203 or aggrandizement photograph SiC and into. Have the heat-resisting with tall hardness, wearability, hear resistance and chemical good stability to pound function, it is a kind of cutting tool stuff that has development outlook. Development of material of Si3N4 pottery and porcelain is rapidder, mix with Japan among them the United States is the fastest. Home in 20 centuries 80 time succeeded with respect to development material of this kind of cutting tool, nitrogen changes silicon (of Si3N4) microscopical hardness, be next to diamond, cubic nitrogen to change boron and carbonization boron, it is a kind of new-style cutting tool material, cutting tool of this kind of pottery and porcelain is in 20 centuries begin to be used in cutting treatment at the beginning of 80 time. Its production process is a nitrogen hind issues silicon pink to undertake the ball is ground in ℃ of L300 ～ L400, join a few aiding agglomeration agent, hot pressing agglomeration falls in pressure of ℃ of L700 ～ L750 and 2Gpa ～ 3GPa and become. Its are main the characteristic is to have good hear resistance and heatproof concussion property. Hear resistance is as high as ℃ of L300 ～ L400, prep above is general pottery and porcelain, can undertake high speed cutting. The 2 ～ that its thermal conductance is A1203 pottery and porcelain about 3 times, and the 1/3 left and right sides that heats up coefficient of expansion to have A1203 pottery and porcelain only, make heatproof concussion function raises 1 ～ than A1203 pottery and porcelain 2 times, have sex of good the blade that fight collapse. Be in intermittent in turning or milling treatment, nitrogen changes the service life of cutting tool of silicon pottery and porcelain to compare cutting tool of A1203 pottery and porcelain to grow apparently. Accordingly, nitrogen changes cutting tool of silicon pottery and porcelain to be able to have temper by dipping in water not only hard steel, cold hard cast-iron the finish machining that waits for material and semifinishing machining, and can use Yu Gang radical the finish machining of material of alloy of hard alloy, nickel radical, glass reinforced plastics and partial rough machining, return the wool bad cutting that can be used at the crusty cast with general insufficient pottery and porcelain. Pottery and porcelain of Sialon of ① Sialon pottery and porcelain is cutting tool of a development of British IdcasAydon company is successful kind of new-style pottery and porcelain. Cutting tool of Sialon pottery and porcelain is A1203 the solid solution in Si3N4, it is material of a kind of when the mixture that nitrogen dissolves aluminous, alumina and nitrogen to change silicon undertakes hot pressing agglomeration in 1800 ℃ and become single-phase pottery and porcelain, nitrogen changes the crystallization crystal lattice of silicon to expand a little, amid Y203 can make an organization compact change. Cutting tool of Sialon pottery and porcelain has very high strength, bending strength achieves 1050 ～ 1450MPa(hardness to be 94HRA) , taller than pure A1203 and cutting tool of A1203-TiC pottery and porcelain, its rupture tenacity also is cutting tool of a few kinds of pottery and porcelain in highest, outclass of its impact strength is general cutting tool of pottery and porcelain (3 ～ 4 times) and be close to Yu Tu layer hard alloy cutting tool. Apply to high speed cutting, puissant cutting, interrupted cutting. Cutting tool of Sialon pottery and porcelain has good heatproof concussion performance, it is 3 times of cutting tool of A1203 pottery and porcelain, agree with not only dry cutting, also agree with wet cutting. Compare with photograph of cutting tool of Si3N4 pottery and porcelain, of cutting tool of Sialon pottery and porcelain fight oxidation ability, chemical stability, fight creep ability and wear-resisting function to rise, be made easily and agglomeration. The heat-resisting temperature of cutting tool of Sialon pottery and porcelain is higher, amount to 1300 ℃ above, and the heat-resisting temperature of cutting tool of A1203-TiC pottery and porcelain is 1100 ℃ accordingly, cutting tool of Sialon pottery and porcelain has better fight plasticity to be out of shape ability. Sialon pottery and porcelain can be used successfully at the treatment of alloy of cast-iron, nickel radical and silicon aluminium alloy, it is high speed treatment is cast-iron and the material of ideal cutting tool of nickel radical alloy. If use cutting tool of Sialon pottery and porcelain when treatment is cast-iron, cutting speed can exceed 900m/min, can be opposite cast-iron undertake discontinuous cutting. Cutting tool durability compares cutting tool of coating hard alloy or cutting tool of A1203 pottery and porcelain raises 10 ～ 15 times. Cutting tool of Sialon pottery and porcelain does not suit to process steel (because its are deliquescent,wear away rate is very high) . Although cutting tool of Sialon pottery and porcelain has a lot of advantages, but turn cutting tool of silicon pottery and porcelain with hot pressing nitrogen same, its fight abrasiveness to be able to be differred than cutting tool of general pottery and porcelain. Cutting tool of pottery and porcelain of FT80 of cutting tool of ② Si3N4-TiC pottery and porcelain is developed by Tsinghua university, person TiC and Co are added in cutting tool of Si3N4 pottery and porcelain, improved the mechanical function of cutting tool of pottery and porcelain and cutting performance. The action of TiC is through dispersion sclerosis is mixed reduce the felt between cutting tool of pottery and porcelain and iron, raised the wearability of cutting tool of pottery and porcelain. The action of Co is the concussion tenacity that raises cutting tool of pottery and porcelain is mixed bear ability of cutting force percussive. F85 is the cutting tool of pottery and porcelain of another kind of Si3N4 that Tsinghua university develops, its hardness is HRA93.

5 ～ 94, bending strength is 650 ～ 800MPa, rupture to pure A1203 of tenacity prep above reachs cutting tool of A1203-TiC pottery and porcelain and be close to at cutting tool of Sialon pottery and porcelain; Its coefficient of thermal conductivity is ／ of 30 ～ 36W () of M · ℃ , cutting tool of pottery and porcelain of prep above Sialon; Hot coefficient of expansion is 1.

℃ of ／ of 7 × 10-6, be less than cutting tool of Sialon pottery and porcelain. Knife of this kind of pottery and porcelain has friend better heat-resisting pounds function, function excel hard alloy reachs cutting tool of a few pottery and porcelain, can cutting is cold hard cast-iron, alloy is cold the material such as the hard cast-iron hard steel that reach temper by dipping in water. Cermet cermet is the new-style tool stuff that 20 centuries have admirable and mechanical mechanical function and high temperature capability one kind of 70 time development. Compare with photograph of traditional hard alloy cutting tool, the hear resistance of cermet cutting tool, wearability, fight crescent moon to wear away depression ability all have rise apparently, dan Ren sex and thermal conductivity are opposite poorer. In recent years, a few accept rice particle were joined to obtain many progress and positive result in order to form the research of composite material of accept rice pottery and porcelain in matrix of pottery and porcelain. Cermet contains titanium radical compound, binder is nickel or nickel photograph. Cermet cutting tool agrees with dry cutting. Grind to horniness before use grinding or electric spark treatment normally, cutting tool of usable now cermet undertakes Gan Xi is machined, improved work efficiency not only, exterior quality also got rising. (4) cubic nitrogen changes boron (CBN) PCBN exceeds material of strong cutting tool as new generation, make cutting technology produced revolutionary change, its efficient to quench hard data offerred a kind of economy cutting instrument. The developed country serves as his raise treatment level and economic benefits (energy-saving, efficient, nicety, automation) main tool material tries to develop. The to difficult treatment material treatment in industry waiting in war industry, space navigation is more cannot little, also be the data of macrobian life cutting tool with necessary development of CNC Machining technology, PCBN cutting tool can is opposite all sorts of hard or the material of wearability undertakes end panel of high speed car, boring, car, grooving, thread machining, thick, half essence, finish machining all appropriate. Carry out a proof, the effect of PCBN cutting tool can improve the treatment quality of the product not only, and also can raise economic benefits. Accordingly, as modern manufacturing industry (especially automobile manufacturing industry) rapid development, the production that exceeds strong cutting tool and application also year after year grows quickly. PCBN cutting tool accords with the main way that current cutting tool develops, improve life namely, improve cutting efficiency, reduce finished cost, assure high accuracy and low surface roughness, satisfy the requirement that difficult cutting material machines. As PCBN oneself quality rise, improve of cutting tool production technology ceaselessly, application of PCBN cutting tool will get rapidder development. PCBN cutting tool special agree with the high speed cutting of strong voice data, dry type cutting, can process the black metal data that place of diamond cutting tool cannot process, suit the use of numerical control equipment and automation product line particularly. PCBN cutting tool has very tall wearability, hard alloy of far outclass of its service life, can process data of major tall hardness, treatment craft can be ground with the generation such as car, boring, mill in a lot of circumstances, can make be obtained by treatment spare parts tall precision and good exterior quality. Improve manufacturing efficiency greatly. Foreign PCBN cutting tool uses hard steel of treatment temper by dipping in water extensively already tall hardness is cast-iron and fight grind a spare parts, brought enormous economic benefits. The hardness as mechanical spare parts and those who fight abrasiveness to be able to ask is farther rise, the use of PCBN cutting tool is sure more extensive. The compositive composition of PCBN is as follows to the influence of cutting tool function: ① bond is to the influence PCBN of function of PCBN cutting tool CBN(cubic nitrogen changes boron) agglomeration body, be not to add binder agglomeration to be become by the union between CBN atom directly normally, also have join different binder, combine agglomeration by binder and become. Former because CBN content is high, hardness is so tall, but more fragile; Latter adds binder scale to differ except place outside, its sort still has the branch of metallic binder and binder of pottery and porcelain. Commonly used metal binder has the metal such as Co, Ni, Ti, Ni-A1; Binder of pottery and porcelain has TiN, TiN-A1N, A1203 to wait, also have what join metal and binder of pottery and porcelain at the same time. The PCBN cutting tool that adds binder of pottery and porcelain commonly is had taller high temperature resistant wear away ability and stronger fight felt ability. The influence of ② CBN content to function of PCBN cutting tool CBN is artificial complex, hardness is next to diamond, its grain hardness can amount to 8000 ～ 9000HV, far outclass pottery and porcelain and hard alloy. PCBN is compound piece hardness (basically depend on for 3000 ～ 5000HV) normally the content of CBN, general CBN content is in 40% ～ 95% between, as the heighten of CBN content, the hardness of PCBN increases; And simple relation is not between wearability and CBN content, there is different and optimal value below different treatment condition, when processing mould steel, CBN content is 55% when the left and right sides, cutting tool most wear-resisting; When processing steel of Cr06 alloy tool, CBN content jumps over wear-resisting higher. The size of the influence CBN grain to function of PCBN cutting tool affects measure of ③ CBN grain the intensity of cutting tool, fine grain can make the crystal boundary area of grain increases, raise agglomeration intensity to reach fight crackle patulous ability, make wearability of PCBN cutting tool increases thereby, increase when bead diameter 1 times when, cutting tool life should reduce 30% ～ 50% . PCBN is to exceed the better green in hard data to do stuff of cutting cutting tool, can high speed dry cutting quenchs steel, cold hard alloy of cast-iron, nickel radical, titanium alloy reachs a variety of thermal spraying material. (5) get together brilliant diamond (the history that diamond of PCD) single crystal regards cutting cutting tool as to already had hundreds of years, be what what discover up to now is the hardest most the material of wear-resisting, as a result of its interior is single crystal department, abrade the cutting point quality that give is wonderful (foreign point radius is OK and at present abrade to) of level of several accept rice, the workpiece surface grain of cutting is admirable. But its price is high, and have cleavage sex as a result of it, often can appear when be pounded brittleness, easy damaged. Because cutting tool of cutting of diamond of this single crystal basically is used at the surface bright and clean degree, the superprecision application field that geometrical appearance and dimension have extremely high demand. PCD cutting cutting tool is to go up 70 time metaphase develops the century exceed cutting tool of hard data cutting. PCD is agglomeration falls in high temperature superhigh pressure with a few bond by diamond small pink and become. Although its hardness under single crystal diamond, however its hardness isotropy, diamond of single crystal of tenacity prep above. Diamond cutting tool has hardness tall, compressive strength tall, thermal conductivity and wearability are good wait for character, very tall treatment precision and treatment efficiency can be achieved in high speed cutting. Afore-mentioned character of diamond cutting tool are decided by diamond crystal condition. In diamond crystal, 4 price electron presses carbolic atomic tetrahedral structure becomes key, every carbon atom and atom of 4 photographs adjacent form covalent bond, form diamond structure then, the adhesion of this structure and directional very strong, make diamond has extremely tall hardness thereby. Because get together brilliant diamond (the structure of PCD) is the body of agglomeration of fine grain diamond with differ orientaton, although added bond, its hardness and wearability under single crystal diamond. But as a result of PCD agglomeration body expression is isotropy, because this is not easy,split along onefold cleavage face. The: of main function index of material of PCD cutting tool? The hardness of Zuo CD can amount to 8000HV, the 80 ～ that are hard alloy 120 times; The coefficient of thermal conductivity of ② PCD is 700 W / ｍ K, for 1 of hard alloy.

5 ～ 9 times, mix high even at PCBN copper, accordingly quantity of heat of PCD cutting tool is delivered rapid; The coefficient of friction of ③ PCD is only commonly 0.

1 ～ 0.

3(the coefficient of friction of hard alloy 0.

4 ～ 1) , because this PCD cutting tool can reduce cutting force significantly; The hot coefficient of expansion of ④ PCD is only 0.

～ of 9 × 10-6 1.

18 × 10-6, be equivalent to the 1/5 of hard alloy only, because of this PCD cutting tool heat is out of shape small, treatment precision is tall; The affinity between ⑤ PCD cutting tool and nonferrous metal and metalloid material is very small, bits is cut in machining a process not easy felt forms the tumour that accumulate bits on point of a knife. Industrial developed country is begun to the research of PCD cutting tool earlier, it is more mature already that its apply. Since synthesizing making synthetic diamond first in Sweden 1953, scored a large number of gain to the research of function of cutting of PCD cutting tool, the applied limits of PCD cutting tool reachs use quantity to expand quickly. Current, the famous making synthetic diamond on international is compound a manufacturing business is main company of British De Beers, American GE company, Japan lives friendly electrical engineering company limited. The applied limits of PCD cutting tool already was machined by earlier turning to auger cut, milling treatment is patulous. By Japan an organization undertakes make clear: about exceeding the investigation of strong cutting tool? The main consideration element of cutting tool of CD of Man of heir eggplant ∮ is the advantage such as the exterior precision after be based on PCD cutting tool to machine, dimension precision and cutting tool life. Diamond is compound piece synthetic technology also got greater progress, de Beers company already rolled out a diameter 74 ｍ ｍ , layer is thick 0.

Of 3 ｍ ｍ get together brilliant diamond is compound piece. Market of domestic PCD tool also extends ceaselessly as the development of level of cutting tool technology. At present group of the first automobile already had China lathe tool of more than 100 PCD uses a site, a lot of man-made board the enterprise also uses PCD cutting tool to undertake wood is machined. The application of PCD cutting tool also promoted pair of its designs and the research of production technology further. College of Tsinghua university of home, Dalian grain industry, China in grain industry college, Jilin industry university, Harbin Institute of Technology all be in the research that begins this side actively. Home is engaged in research and development of PCD cutting tool, production have Shanghai Shubaihate, Zhengzhou is new inferior, embellish of Nanjing La Zhi, Shenzhen auspicious, a few units such as Chengdu tool institute. Current, the size range of pipe bent of PCD cutting tool already expanded from conventional metallic cutting treatment stone material treatment, lumber treatment, metal radical the treatment of the material such as pottery and porcelain of composite material, glass, project. The analysis that in recent years through be opposite PCD cutting tool uses is visible, does PCD cutting tool basically apply at the following two respects: ? When? of commonplace of collect of department of herd of Ban of fish hawk of  of orangutan of び of commonplace of duck of a keeper of domestic animals processes data of difficult treatment nonferrous metal with common cutting tool, often produce cutting tool easy wear away, machine effect to lead low blemish, and PCD cutting tool can show good treatment performance. If can process data of new-style engine piston effectively with PCD cutting tool - over- in all brilliant silicon aluminium alloy (the research that machines mechanism to this material already obtained breakthrough) . ② is difficult the treatment that processes metalloid data: PIt is difficult that CD cutting tool suits to enhance plank of plastic, man-made to wait to carbon of stone material, horniness, carbon fiber very much the treatment that processes metalloid data. Be like China in grain industry college came true to machine vitreous; with PCD cutting tool 1990 aggrandizement is at present compound the application of floor and material of other wood substrate is wide with each passing day, with treatment of PCD cutting tool these material can avoid cutting tool effectively easy wear away wait for blemish. The choice of PCD granuality and condition of cutting tool treatment are concerned, if the design is used at the cutting tool of finish machining or superfinishing, should choose intensity tall, tenacity good, anti-impact properties is good, fine the PCD of grain. Cutting tool of thick grain PCD can be used at general rough machining. The granuality of PCD material to cutting tool wear away and damaged function effect is distinct. Research makes clear: PCD size number is larger, of cutting tool fight abrasiveness can stronger. The hardness of PCD cutting tool is tall, thermal conductivity is good, hot coefficient of expansion is very small also, particularly appropriate do cutting treatment at the high speed of all sorts of copper aluminium alloy, metalloid material and composite material. 4.

Last word dry cutting is meant in turning, milling, auger cut, in the cutting treatment process such as boring, remove the adverse effect of cutting fluid, big earth is managing finished cost, protected an environment. Current, the industrial developed country such as Europe and Japan takes the development of dry cutting technology and application seriously very much, be versed in in Europe according to statistic industry, have about 10% ～ the treatment of 15% had used dry cutting technology. Take seriously to resource and environmental protection increasingly as the mankind, the negative effect of cutting fluid causes people attention gradually. With dry cutting treatment replaces wet treatment, it is the way that mechanical manufacturing industry can develop continuously. Research realizes dry cutting processing technique, seek appropriate dry cutting to machine craft to all sorts of different workpiece material, throw industrial application as soon as possible, to protecting environment of our country zoology, enhance the competition ability of company product, have very important sense. Current, the our country research to dry cutting technology is less, application also is conventional cast-iron milling treatment only. To catch up with international situation, comply with the development trend of world cutting technology, our country should accelerate the research of pair of dry cutting technologies. The manufacturing industry of 21 centuries is higher and higher to the requirement of green environmental protection, dry cutting technology regards a kind of green as workmanship to saving resource, protection it is environment, important to reduce cost to have meaning, reach the development that craft studies related its as machine tool technology and cutting tool technology, dry cutting technology is sure to make the main development way that metallic cutting machines. CNC Milling CNC Machining