Titanium metal because the material of its oneself is characteristic, in future (it is especially in aviation industry) the effect with will rise mainer and mainer. Titanium gold accessory has strength good, heat conduction leads tall, tenacity low and special fighting corrodes the characteristic such as ability. As carbon fiber (CFU) is used as aviation component material in great quantities, the application of titanium metal component also increases subsequently, because titanium metal and CFK match,this is when using, both the electrochemistry voltage of a generation wants than the voltage between plumbic metal and CFK low. Henceforth, can the structural part with larger more is made with titanium metal, this raised a requirement with respect to the technology design that machines to cutting, must provide the efficient milling tool that can get used to titanium metal to machine. Machine efficiency to raise milling, besides in cutting tool macroscopical geometry structure designs fluctuation kongfu beyond, change its the design parameter of microcosmic geometry structure also is one of ways. Here, the point passivation that should mention main to raising cutting efficiency to rising effect above all handles technology. According to the knowledge with current people, when machining titanium metal, use point the cutting tool of sharp edge acute is beneficial to improving cutting efficiency. The test result of the following introduction shows, although titanium metal has such material character, but through changing cutting tool appropriately the design parameter of microcosmic geometry structure, can rise to improve the function of cutting efficiency likewise. Normally useful brush brushs the means of the passivation of point of cutting tool of technology of point passivation processing that has tall reproduction sex, polish of gush bolus, platen. The article introduces a kind of newer point passivation to handle -- technology of magnetism nicety nap. Be full of between two magnetic head what mix by magnetic grain and become is strong blow medium, two magnetic head rotate with different speed, by park of processing cutting tool between two magnetic head, whirligig is made in the fluid that fills scrape medium, medium is right the point of cutting tool, from the back, in front undertake eroding with blade channel. This kind of method also can be used at handling PVD coating cutting tool. Because the geometrical appearance of cutting tool point is not complete symmetrical, its passivation degree is inhomogenous also. To can describe random clearly the geometrical structure of point of a cutting, collect below in order to a few parameter especially: In front section S γ , from the back section S α , section scale K, r of radius span △ . Before consider to make clear, after point classics passivation is handled, have very big effect to the cutting efficiency of cutting tool. The course studies further at present, people discovery, course of cutting tool point is asymmetrical even passivation processing, the cutting tool function that even passivation handles semmetry of excel of function of its cutting treatment. This technology uses what Yu Dao provides point passivation to adjust parameter to include: Rotate speed of cutting tool of; of direction of rotation of magnetic head of; of cutting tool direction of rotation coming back spends rotate speed of; magnetic head coming back to spend; the; of deepness of positional; immersion between magnetic head develops cutting tool of; of time of process of processing of; of span of two magnetic head blow medium granuality. Magnetic head span and passivation processing time have very big effect to handling the effect. Lengthen passivation to handle time, point passivation degree is increased subsequently, but increase degree present to reduce a current. Accordingly, to increase passivation amount further, expend more time and material with respect to need. If time of point passivation processing is constant changeless, the span of two magnetic head is smaller, point passivation amount is larger, because span decreases Xiaoshi,this is, the can more, firmer adsorption when scrape medium is bigger than span is in point surface, when cutting tool and magnetic head make whirligig, taller medium absorption affinity can form greater pressure to point, make point surface material achieves much better scrape result thereby. The cutting tool that point passivation can raise cutting tool durability to be handled from course point passivation (the milling cutter of integral hard alloy that takes 4 cutting blade like, diametical D=16mm, ° of =40 of helix angle λ , before ° of horny γ =12, ° of =10 of α of the horn after radial) microcosmic appearance can see clearly, after cutting tool point is handled through accurate nap, divide point by passivation outside, blade channel surface also by polishing. With the cutting tool that handles through point passivation, when undertaking machining by traditional cutting parameter, its service life can rise 70% . Point passivation amount is larger, the wear-resisting caustic performance of cutting tool is better. The cutting tool that handles without passivation is when cutting treatment, point place can appear because of subtle damaged bigger wear away, and happen rarely on the cutting tool that this kind of phenomenon is handling through point passivation, because be in cutting treatment,this is, the meeting on cutting blade generates very great pressure, form content of a few felt on the edge that handles via passivation, make edge becomes solidder and not easy thereby wear away. After cutting tool is handled through passivation, the cutting performance of point is more steady, this pair of treatment efficiency that improve titanium metal are attached most importance to especially should. Because can avoid point damaged effectively, accordingly, cutting tool tatty distributings and the process is very even with stability, the security that cutting machines and dependability also rise greatly. In point passivation quantity the biggest case falls, increase every to age the test data of feed makes clear: When Fz=0 of every tine feed. 06mm, increasing the circumstance of one times to fall than common cutting condition namely, the durability of cutting tool is highest. The experiment is interrupted when cutting quantity achieves Vw=2300cm3 stop. Because reduced the cutting travel of each cutting blade, because of this Fz=0.
Fz=0 is compared when 06mm.
The cutting tool durability when 03mm rises greatly. To process the data of same amount, be necessary to reduce the rotate speed of cutting tool. And be more than cutting tool point when cutting ply from the back when section S α , also can improve cutting tool to wear away state. But, continue to raise tooth feed, can cause machine tool machinery to bear increases and be brought about wear away increase, make cutting volume drops. Additional, point still can reduce the flutter that cutting process produces through passivation processing, although choose taller cutting parameter to undertake cutting is machined, still can assure the durability of cutting tool. After point classics passivation is handled, cutting tool wears away when use very even, mix in front of of cutting tool right now from the back can form felt content. Become when feed is bigger, point did not appear apparent damaged. To do farther test, raise every tine feed Fz=0.
15mm, cutting deepness reduces Ap=5mm. When cutting when deepness is bigger, cutting force also increases accordingly, bring about cutting tool damaged thereby. When feed bigger also, when cutting deepness Ap=16mm, cutting process can appear flutter, make cutting tool produces damaged, machine tool main shaft also can be damaged. Processing of passivation of brief summary point wears away to cutting tool and cutting treatment efficiency is having great effect. Like milling cutter blade of this kind of circumferential cutting, rotate semmetry cutting tool, can undertake through technology of magnetism nicety nap point passivation is handled, before cutting tool, from the back, blade channel also at the same time by polishing, this is very advantageous to avoiding to produce felt. When pressing traditional cutting parameter to undertake to titanium metal milling is machined with the cutting tool that handles through point passivation, its durability can rise about 70% , every tine feed also can rise apparently. The experiment shows, when Fz=0 of every tine feed.
When 06mm, position of cutting tool cutting is optimal, also do not observe subtle damaged on cutting tool point. CNC Milling
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