Milling cutter of face of new-style and cast-iron treatment
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- source:LENA CNC Machining
Place of 3 kinds of razor blade uses above material all is to be this MC5020 of special development. Graph the clamp orgnaization of 2 new development is cast-iron and commonly used have common ash the mouth is cast-iron with nodular cast iron 2 kinds, former intensity is low, machine more easily, but because cut bits short and broken say collapse is broken model cut bits, when generation cuts bits this kind, cutting force change is big, yi Zhen is moved, requirement knife sheet expects aseismatic performance is high, and latter strength is great, the resistance that cut bits is great, the meeting that cut bits is stretchy, because face of the knife before this and razor blade has,slide relatively, temperature of face of the knife before making rises, face of the knife before causing wears away, its wear away when place comparing cuts steel more approach the crucial point, reason edge is fragile. On the other hand its those who cut bits comparing to cut steel is short, cutting force is fluctuant also, cause cutting vibration, make bit produces collapse blade damaged possibly also. When the matrix of nodular cast iron is hard pearlite, bit is easy wear away, when matrix is soft ferrite, of bit before knife face and hind knife face Yi Rong is added cut bits, frit adds cut bits to be able to be enforced to fall off by follow-up treatment concussion cause collapse blade, generate crackle to make cutting not stable. At present AHX640W place chooses bit material MC5020, relative to the bit data that uses before, have very big improve. Wearability is good, can restrain when machining nodular cast iron, easy happening collapse blade (damaged) can come true to stabilize ground treatment for a long time with heat cracks. MC5020 this kind of material and coating not only but cutting tensile strength is less than those who be equal to 450MPa is common and cast-iron, the high strenth that passable cutting tensile strength amounts to 500-800MPa is cast-iron. The bit ply that AHX640W place uses is 6.
55mm, to lose horny bit, the bit ply that its ply is more than SE445 place to use 4.
76, ASX445 place uses bit ply 3.
97, 3 what OCTACUT place uses 8 horn bit.
97-5.
0 4 with circular razor blade.
17-5.
2 (above place compares each model bit all is horny razor blade, sharp sex is good) . Knowable AHX640W place uses bit can susceptive cutting bear is highest. Above each model if face milling cutter all uses MC5020 stuff place the cutting speed ASX445 with applicable cast-iron treatment is 150-250M/min, SE445 is 100-250M/min, as a result of,AHX640W place uses bit characteristic of its geometry structure, when common and cast-iron treatment, cutting speed can amount to 250-350M/min, high strenth nodular cast iron can amount to 150-300M/min, place of milling cutter of of all kinds face uses every tine feed 0.
2-0.
4 it is about the same, but because AHX640W can hold razor blade number is maximum, the workbench when treatment is minutely F of × of Z of feed F=N × (Rpm of N= milling cutter, z= tooth is counted, feed of F= every tine) highest, if with φ 180 milling cutter are exemple. AHX640W can hold 22 razor blade, old model can hold 10 razor blade only, same every tine feed, handling time can shorten 2/3. Reason is OK obvious can achieve very tall efficiency in the light of cast-iron treatment. When decorating smooth blade razor blade to undertake light makes treatment, cut be in greatly 0.
5 arrive below 3, cutting speed 200 to 400 M/min. Every turn feed is 1-6. Treatment surface quality and bit life Yuan Chao pass general product. The razor blade with M5020 qualitative material although function is to exceed before razor blade of hard alloy coating, but should raise cutting rate further, machine efficiency, ask tall bit life, must change the stuff with be used better than coating hard alloy. In cutting cast-iron respect, the CBN that this uses hard metal of outclass of coefficient of thermal conductivity, hardness namely (cubic nitrogen changes boron) . CBN is to use nitrogen of 6 crystal lattice to change boracic pink to be below high temperature high pressure (about 1600 ℃ , 5-6Gpa, form single crystal pink with face or 6 2 pressurization, single crystal pink can use as abrasive) . Single crystal pink adds activator again, bond (be in about 1300 ℃ , 5-6Gpa, press again) attainable get together on the integral razor blade of brilliant CBN or hard alloy base, take the compound bit of CBN layer. (thicker CBN layer can use solder of technology of special Hun solder to be in a of bit or on horn of a few knives) . Bond has the Co of metal mold commonly, ni; Pottery and porcelain 3 oxidation 2 aluminium; Cermet TiN, tiC, tiCN, alN. The tenacity of metal mold, conductivity is better, but below high temperature, bond bate, wear-resisting and performance characteristics drop. Bond of pottery and porcelain is high temperature resistant wear away, felt force is powerful, but surge resistance is poorer. General cermet bond has better integral performance. Company of 3 water chestnut also constant cermet and pottery and porcelain 2 kinds of bond are operable. Graph the organization of 3 MC5020 and coating and with before coating gets together quite in brilliant CBN razor blade, CBN content is 50%-95% commonly, press content how many, the sort of bond, the comfortable treatment of CBN razor blade of certain brand quenchs steel. Certain comfortable treatment is cast-iron, heat-resisting alloy, agglomeration alloy, for wide choice mill cast-iron, company of 3 water chestnut developed razor blade of CBN of whole of CB5030 material qualitative anise recently. In 350Mpa with its cutting tensile strength speed of the following common and cast-iron cutting can amount to 800-1500M/min, every blade feed is amounted to 0.
05-0.
15. Content of CBN of this kind of razor blade is high, because bit is integral CBN, can undertake cutting of big cutting deepness (the biggest amount to 8mm) all can realize efficient treatment in thick finish machining. Its appearance has CB5030 bit TiN coating, can make has used knife part identifies easily. CB5030 can achieve taller than M5020 razor blade cutting efficiency, it is razor blade of octagonal negative horn, face of reason positive and negative can use 16 knives part in all, special economy (when cutting deepness 3mm) . CNC Milling