The turning of titanium alloy spare parts is machined
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- source:DAHLER CNC Machining
The round razor blade of 7mm inscribed circle is being cut deep its are effective when be more than 2mm lead horn can be reduced, because this had better use square bit, because be being cut identically,fall greatly, square razor blade still has part of 45 ° lead. Bill Skoretz is the manager of branch of treatment of Patriot Forge company, this company is offerred wait for of all kinds raw material to alloy of special brand aluminium alloy, titanium from low-alloy steel, stainless steel, the client that also can be a company sometimes machines titanium alloy spare parts. When the challenge that faces when place of alloy of discussion turning titanium, he reviewed turning rolling mill to use the experience of cooling fluid shower nozzle mainly. This kind anticorrosive titanium alloy brand has abrasion. Because titanium alloy possesses resilience, because this must be used angle of cutting tool geometry, and the appearance that should value cutting tool head. If the bottom horn of cutting tool or before part is too small, cutting tool can begin to produce pulling force, bring a lot of issues thereby. Accordingly, must be in cutting tool head geometrical angle and to cutting blade prop up between find optimal balance. Skoretz described the development current situation of cutting cutting tool from historical angle. Before development gives hard alloy cutting tool, basically use high-speed steel cutting tool to come cutting steel products. The occurrence of hard alloy cutting tool makes use geometrical angle becomes a possibility, but the machine tool must have enough power. Razor blade of the horn before losing can make titanium alloy material produces fold or extruding only, and excise its hard. But he is warned again say, if of bit before part is too large, also can form pulling force to titanium alloy material. Accordingly, must be in pressure stress and pull the balance is found between stress. He mentions the past to ever had been used on cutting blade preparation has 0.
1mm or 0.
The razor blade of the T of 13mm first flank, "Main the safety for edge, cannot use too sharp cutting blade, because it cannot be maintained how long. " he still used liquid of oil radical cutting in treatment, but basically be to use its lubricant and characteristic and not be cooling power. Other job shops also has method of different titanium alloy turning, because the purify treatment of any material is put in the solution that all sorts of differring. The business that Rayco Machine company has 30% is spare parts of treatment racing bicycle, have among them a lot of it is the titanium alloy spare parts with high price, because group of top class racing bicycle is willing to attach most importance to a quantity the premium of spare parts defray with light, high intensity, the least weight that allows in order to make their racing bicycle maintains in regulation but still can be opposite at the same time its are whole of automobile body weight distributing retain control. For example, reduce rotate part and blame suspension part (like wheel and brake component) quality is OK and effective rise acceleration and hold control function. The titanium alloy that Rayco company turning machines includes to move at the spare parts between clamp of apply the brake and rotor in the spare parts. Like Skoretz, greg Cox of Rayco company president also expresses, for successfully turning titanium alloy, need uses the method of balanced give attention to two or morethings. He thinks, when choosing cutting parameter, very important when was being machined namely cannot elbow workpiece material, produce treatment sclerosis easily otherwise, cause very big trouble to treatment. The treatment parameter that Rayco company uses normally is: Cutting speed 120 Sfm, feed 0.
13 - 0.
20mm. Cutting deepness is very important also. Same, cut moderately deep it is optimal choice. What Rayco company uses is the biggest cut deeply 0.
8 - 1mm. The titanium alloy spare parts of Rayco company machines batch to be able to be as high as 200, but it is to be in mostly 5 - 20 between. Cox expresses, rayco company also is improving technology continuously, but when involving cutting parameter must scrupulous, because titanium alloy is quite costly, cannot lest act recklessly brings about a spare parts to discard as useless. Of titanium alloy rise in price very fast, last year from 47 dollars / the pound rises to 68 dollars / pound. The price of titanium alloy tall look forward to also makes the inventory of workpiece material constrictive. Dive the research and development of company of equipment manufacturer Atomic Aquatics and Scott Holland of production branch general manager express, when the alloy that use titanium machines underwater respirator, "We always try to improve treatment efficiency ceaselessly, with shortening workpiece of more of handling time, treatment is mixed prolong cutting tool life. " but when they try to machine more spare parts, subsequently and those who come is cutting tool breaks off suddenly. Accordingly, holland hope can achieve optimal and balanced dot, but this kind balanced be not is number and program only. Holland has titanium alloy of nearly 10 years to machine experience, the configuration that he also depends on observation work and cutting tool, listen attentively to cutting noise to master this kind is balanced. Holland expresses, treatment titanium alloy also can be compared simple, "If use the time that sharp cutting tool estimates by oneself to change a knife, can machine titanium alloy inside narrow range only. You can undertake trying by your means, but not certain get the desired result. The treatment of titanium alloy has certain law, if you grasped these patterns, OK handy. " the cutting technology that increasingly wide application promoted titanium alloy to attach most importance to a dot with alloy of efficient turning titanium develops. Company treatment manages Shanteweikekeleman to support senior manager Chris Mills to emphasize with the technology, when turning titanium alloy, chemistry wears away is main cutting tool failure mechanism, and cutting high temperature quickened chemistry to wear away. When boiling hot cut bits to had delimited when face of the knife before cutting tool, meet actually from inside bit " pull out " cobaltic. Mills introduced to reduce the method of cutting temperature through two measure: The first pace is to use cutting tool geometry to design (if use the square bit that takes part of 45 ° lead or round bit) will reduce the thin thickness that cut bits, in order to drop cutting temperature, reduce the crescent moon that causes from this to wear away depression, can use finally taller feed is led and prolong cutting tool life; The 2nd pace is the high-pressured cooling fluid that makes appliance has special pattern. This kind of cooling fluid has high-pressured power not only, and present a form of very exact laminar flow eject, can form between face of the knife before cutting bits and razor blade " water wedge " , cut bits with be being held in the palm, make its and before the contact of knife face is the smallest change, avoid to produce crescent moon to wear away depression thereby. The pressure of cooling system is this kind of Jetbreak of Shanteweike 1000 - 3000psi, use a diameter 1.
The nozzle of 27mm and standard emulsification cooling fluid, it has cooling effect not only, and can arise hold the lift that cuts bits in the palm, can reduce cut bits and before the attrition between knife face and temperature. Use this system to be able to make cutting rate rises 50% . Mills described use integratedly afore-mentioned two kinds drop in temperature politic effect: Use - the CNMG razor blade of horn of 5 ° lead with optimized cutting parameter (cutting speed: 40m/min, feed rate: 0.
3mm/rev) when machining titanium alloy, cutting tool life is 20 minutes about; And when the square bit that uses round razor blade or part of 45 ° lead undertakes machining, can raise cutting rate 50 - 60m/min, feed rate rises 0.
4mm/rev, can maintain similar cutting tool life. Because more workpiece material can be excised in same time, use square razor blade to be able to make productivity breaks up merely time, if use high-pressured refrigeration system again, still can raise cutting rate again 50% . The channel that high-pressured cooling fluid must carry interior of machine tool main shaft (is not exterior conduit) carry. Cooling fluid sheds a when via Shanteweike Capto changes tool collet quickly to go up special connector, control its pressure by Capto. When installing a machine tool, can install system of refrigeration of this kind of high pressure easily. To often machining titanium alloy spare parts (especially high large aviation component) workshop, raise the productivity of 50% to be worth their investment to buy collet of special cutting tool and the machine tool that installed high-pressured refrigeration system. System of refrigeration of this kind of high pressure has distinct advantage when turning titanium alloy, because won't resemble treatment,other workpiece material produces crescent moon to wear away depression in that way. CNC Milling CNC Machining