Exceed the application of hard data cutting tool in mechanical cold working

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1 exceed the basic idea of hard data cutting tool and development general situation to look from current machining trade, on traditional sense exceed material of strong cutting tool to basically include natural diamond, making synthetic diamond and cubic nitrogen to change boron these 3 kinds of material. Because natural diamond amount is relatively exiguous, satisfy the large-scale requirement of machining industry hard. Although making synthetic diamond can realize mass production, but because cost is higher, market price standard is high, because this also gets hard,popularize application extensively. Our country applies at exceeding the mainstream material on hard data cutting tool at present is to get together nitrogen of brilliant cubic metre turns boron and its composite material. The earliest application that exceeds hard data cutting tool is in on the world the United States the fifties, the scientist coagulates through be being added in condition of high pressure of experimental high temperature the method of mixture, made the nitrogen with larger amount change boron to get together brilliant piece. In a few years subsequently, the scientist is developed early or late again gave diamond hard alloy and nitrogen to change boron compound piece, basically solved the origin problem that transcends material of strong cutting tool. Our country considers to begin in the related side that exceeds material of strong cutting tool at going up century seventies, although start earlier, but as a result of at that time the limitation of all sorts of outside ambient, no matter be production technology or workshop equipment condition are relatively difficult, study working progress is slow so. Till 20 centuries end just begin to undertake to this respect project approving studies on real significance, had obtained at present relatively the gain that showing. The sort that 2 exceed hard data cutting tool and function analysis do not contain any metallic activator in CVD diamond, its thermal stability and hardness greatly approximate at natural diamond. CVD diamond is had very strong fight abrasiveness and extremely tall hardness, it is the material of accepted the strongest cutting tool on eye preexistence bound. Besides, CVD diamond still has coefficient of friction small, thermal conductance effect of tall, cut is good wait for a lot of advantage, undertaking metal and respect of metalloid material cut have very good effect. But the thermal stability of CVD diamond is poorer, and hardness is superabundant, tenacity is insufficient, appear easily below the circumstance of high temperature of long-term cut generation carbonization phenomenon, cannot use at the treatment of the material such as hard alloy, steely alloy. Get together nitrogen of brilliant cubic metre changes boron (PCBN) cutting tool, what make part according to its is different, can divide to get together nitrogen of brilliant cubic metre changes boron compound piece, whole gets together nitrogen of brilliant cubic metre changes boron cutting tool and eletroplate cubic nitrogen turns boracic cutting tool 3 sort. Among them, get together nitrogen of brilliant cubic metre changes boron is to apply a relatively extensive kind to exceed material of strong cutting tool at present, have extremely tall wearability and thermal stability, apply to operation of current and most machining, and its material origin is relatively extensive, production cost photograph is low to wanting at diamond, because this made the mainstream choice of material of machining cutting tool. Man-made gets together brilliant diamond is to be below condition of high temperature high pressure, join metallic coagulant to combine diamond monocrystal material a kind of formation material. In hardness respect, be in CVD diamond and natural diamond between, but its tenacity wants prep above both, still have better compatibility and solderability at the same time. At present man-made gets together brilliant diamond is multi-purpose the treatment cut at accurate and small-sized component. 3 exceed the application of hard data cutting tool in mechanical cold working 3.

The 1 application in turning treatment is in turning steel when material is machined, to the treatment of hard steel of temper by dipping in water, exceed hard data cutting tool to be able to achieve the treatment result that grinds with car generation greatly. In cutting treatment process, as a result of its cutting deepness wants far outclass grinding, the work efficiency that grinds with car generation improved on great rate, reduced the cost that treatment makes thereby. Those who need an attention is, when undertaking the component machines tall hardness machinery, should take low speed or in the cutting means of low speed, prevent to exceed orbit of cut of deviate of hard data cutting tool. Nextpage is in turning is cast-iron when, to the exhaust valve base that engine crock builds, can choose alloy cast iron of Gao Ge of copper, molybdenum, the treatment of this kind of material has turning and milling commonly 2 kinds of craft. When the cutting tool that makes with PCBN stuff place machines undercarriage of casting pig Buddhist templeput on the brakes, its cutting speed is in commonly 700~2000m/min is optimum. 3.

When the aluminium alloy of cutting tool milling that the 2 application in milling treatment make with PCD material, when its speed can achieve the casting pig of cutting tool milling that 300~4000m/min; makes with PCBN, its speed is commonly inside 1000~2000m/min limits. Current, the speed of cutting of PCD face milling cutter that our country machines aluminium alloy crock to build already achieved 4021m/min, its feed speed is 5670mm/min, this kind of efficiency is 20 centuries of our country 2 times what 90 time initial stage introduces foreign device. The rate of milling of CBN face milling cutter of cylinder body of finish machining casting pig also achieved 2000m/min, its efficiency is milling cutter of hard alloy face of 10 times. In vitreous deep treatment, application of milling cutter of face of fluid of the platoon inside the PCD helix of milling glass is most wide. 3.

The 3 application in broaching treatment are in broaching treatment, use complex formula involute to jump commonly aperture of workpiece of treatment of broach of hard data of the Kong Chao inside tine, its advantage basically has at 2 o'clock: It is spline blade firstly the tooth structure that opens backlash and jump reasonably pattern of tine platoon cloth, assured the production quality of broach, and its workmanship is not complex, broach photograph compares cost and common complex formula involute to also do not have too much difference. It is means of this kind of treatment made sure the coaxial between each shape face spends the aperture inside workpiece secondly, in follow-up treatment working procedure, OK and unified choose trail round face to be fixed position fiducial, the foreword after making thereby examines of arbor and fixed position arbor make simplified a lot of, also made sure each machine positional precision of the surface at the same time. 3.

The 4 bore with a reamer that cut treatment to apply mediumly in hard cast alveolus or hard steel of temper by dipping in water in bore with a reamer cut treatment in, PCBN eletroplates reamer application is very wide. This kind of reamer serves as matrix with the 45# steel of 9CrSi or 42HRC, have cutting and around oriented part. Its matrix design wants very reasonable, and production precision demand is very high, oriented part is large before cutting part should be compared 0.

04mm, workpiece hole depth should be less than cutting area length, after cutting area length should be compared, direct length slightly small. For example, some factory machines what the diameter is 12mm about to quench steel workpiece, its hardness is 45HRC, bottom dimension is 12mm about, the cylinder that machines requirement aperture is spent for 0.

005mm, exterior surface roughness is 0.

2 μ M.

What this moment chooses commonly is a group 5 eletroplate CBN reamer will undertake machining. Some engine manufactory uses PCBN or PCD eletroplates the headstock aperture of body of cylinder of bore with a reamer of reamer top gem will replace honing, this kind of practice makes work efficiency rose multiple, and quality of treatment finished product is stable. 3.

The 5 phenomena that getting the application in cutting treatment to process project pottery and porcelain, glass and stone material with PCD broach are very common. Company of deep treatment of inn of a lot of glass and glass uses PCD broach to drill the hole that cuts glass and mirror. Current, our country's common diamond bit diameter is commonly between 3~130mm. Vitreous broach has colophony diamond, also have those who enchase diamond. With PCD broach treatment stone material and project pottery and porcelain have efficiency the good point with tall, good quality. Diamond electroanalysises auger cut usable will shape the columnar aperture on all sorts of difficult treatment conductor (blind Konghe via) , special model Kong Heyuan taper hole. Nextpage epilogue: Show level, the machining branch demand to machining is complex with each passing day and diverse, besides assure to machine quality besides, machining flatness, smooth degree and fight abrasiveness to be able to wait for a respect to also raise taller requirement, traditional metal or metallic alloy cutting tool cannot have satisfied the machining requirement with slashing condition. The use that exceeds hard data cutting tool can very good settlement problem of this one treatment, increase the unique dominant position that exceeds place of hard data itself to have, obtained on the machining work of different domain relatively the result that showing. Use to realize the dimensions that exceeds hard data cutting tool to change, promote machining quality and treatment efficiency, broad machining personnel needs to strengthen the study of oneself major skill ceaselessly, thorough knowledge and analysis exceed hard data cutting tool the problem in machining and inadequacy, so that be optimized accordingly and perfect countermeasure at adopting, the further progress that is machining provides fundamental safeguard. CNC Milling CNC Machining