The milling of turbocompressor lamina is machined

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  • source:KOMANG CNC Machining
The machine tool of Turbocam5 axis treatment that American Turbocam company manufactures is the rotor that is used at machining turbine, whole set such as stator spare parts. The data that processes the treatment on the machine tool in Turbocam5 axis includes dispersion sclerosis alloy of stainless steel, titanium, nickel alloy, a lot of workpiece have very high high temperature strength, machine very hard. Machine this kind of material to should be used sharp before horny cutting tool, undertake to material " cut " (is not " extruding " ) treatment, make the attrition of cutting process is decreased to the smallest.  normally, the part of the turbocompressor is very complex, its model antrum is very deep, model the circular arc radius of antrum deep and root ministry is very small. This forces cutting tool to hang extend length bigger, and cutting tool diameter is restricted, make cutting tool long way older. The long way of normal treatment establishing mill is 4:1 than making an appointment with, and Turbocam company's commonly used long way is compared achieve 10:1Or 20:1. Sometimes we also use a few very fine cutting tool, its diameter is 0.

5mm or 0.

75mm. Cutting tool of small to using diameter undertakes deep model antrum is machined and machine than cutting tool with old long way, concern with the hardness of cutting tool directly, and feed is used how old, cutting position how, should see cutting tool whether have deflective.  Turbocam company used many ball head to establish milling cutter. John Bressoud of this company assistant manager says, for treatment one special model face, when excision surplus is lesser, should use ball head to establish milling cutter. Machining very deep model when antrum, because cutting negative charge is bigger, should use crop to establish milling cutter or contain round horn radius for 0.

The crop of 5mm establishs milling cutter to have precision work. Establish milling cutter to ball head, top of the head that be apart from a ball is further, its cutting rate is higher, till cutting tool the biggest diameter. The integral hard metal that place of  Turbocam company uses establishs milling cutter most is appropriative. Set but of dislocation razor blade establish milling cutter to suit Turbocam5 axis to machine a machine tool to be opposite not quite the requirement of small diameter cutting tool. Undertake machining on machine tool of Turbocam5 axis treatment when, the coaxial of cutting tool and machine tool centre of turning circle is spent is a problem that is worth to take seriously. If be in space navigation industry, the architect asks to direct the needle has 0.

The figuration error of 076mm, but the radial of bit has beaten big, achieve 0.

05mm, already occupied go the tolerancepublic errand belt of 2/3, cannot satisfy a requirement apparently.  so, should master the correlation that optimizes tool and workpiece and machine tool motion. In treatment of 5 axes milling, the directional orthogonality that good position is cutting tool shift has spool thread at the knife. Machining center can process the Turbocam5 rod of Mikron Bostmatic company very complex model face outline. Turbocam Failors is the machine program that finish machining uses. If have a precision enough tall plane (than 32 small inch not bad) , use a few accurate technologies again, can machine an appearance error to compare ± 0.

0025mm returns small lamina. Of course this should decide according to the size of the spare parts. Company of  Tech Development also is a manufacturer of production turbine, be engaged in design, experiment and the relevant spare parts of production turbine technically, can produce the other product such as magnetic force bearing. This company uses 5 rods processing technique treatment is sophisticated model face, besides using Bostomatic5 axis machine tool, what still have Parpas company production is large 5 axes machine a machine tool. 5 axes when processing technique can make the user is machining complex part, avoid point of on cutting tool 0 rate to participate in " cutting " , the machine tool can be directional cutting tool, need not the center that ball head establishs milling cutter undertakes cutting. In treatment, can use advanced cutting method, if helix cuts work, it is easy that it wants than be being cut directly. Those who be worth to point out is, the spare parts that can machine on 3 axes machine tool, not was necessary to be machined on machine tool of 5 axes treatment. Tech Development company is main it is to use head of ball of coating of aluminous titanium of integral hard alloy, nitrogen to establish milling cutter and zone of round horn establish milling cutter to machine turbine component, become when mental allowance is bigger, be in have enough dynamic milling cutter stands to undertake machining with high-speed steel on 3 axes machine tool, this cutting tool establishing mill has very small screen resilience, the speed of cutting is not very fast, but usable bigger cut deep, treatment effect is very good. The tool clamp kind with  right choice is very important also. In the circumstance with a few tall claimed accuracy, can choose authority of shrinkage fitting tool. Treatment turbocompressor component is to use taper ball head to establish milling cutter previously, because cutting tool charge is more expensive, and production public errand does not accord with effective demand, the ball head that chooses shrinkage fitting to block an outfit to block a diameter to be 3mm, 4mm now stands milling cutter. The coaxial when this kind of shrinkage fitting blocks a movement has been spent, cutting tool and card head have 360 ° contact. The workpiece appearance that treatment gives is bright and clean degree very tall. The outline outside head of shrinkage fitting card can try to repair appropriately cut, have the interference of the head that receive check and workpiece in order to eliminate. Stellex company produces turbine hardware technically (impeller and stator) . Doug Verill of assistant manager of this company Department of Commerce says, the material of of all kinds component of the turbocompressor each different, from 6061 aluminium (alloy of a kind of Al, Mg, Si) be equivalent to GH738) of high temperature alloy to Waspaloy(, hastelloy(is equivalent to GH22) of high temperature alloy, haynes188(belongs to Co, Cr, W to fasten) of high temperature alloy, even material of pottery and porcelain. Accordingly, new to research and development product is when premeditate choice cutting tool, productivity is admittedly important, should pay attention to quality more, when machining crucial part, would rather much take a moment, in use of cutting tool of in an attempt to obtains longer life and better use the effect. Machining a turbocompressor when of all kinds spare parts, this company always uses cutting tool of standard coating hard alloy, and do not use too high cutting rate. To the part with complex form, 90% above are to use ball head to establish milling cutter, have enough strength to assure cutting tool, cutting tool groove should as far as possible a few shorter. When processing data of foreign special workpiece, should assure normal cutting and avoid friction, also but workpiece temper by dipping in water hard, falling without any oscillatory percussive circumstances, use high speed and small cut deep treatment method. Many heat in metal cutting arises when  has some of alloy to treatment, should consider to choose proper, efficient cooling way: A few cooling fluid can cool cutting tool and decrease wear away, and cannot avoid friction; Another some of cooling fluid can make attrition the smallest change, but cannot prolong cutting tool life.  establishs milling cutter about how choosing, steve Abrams of manager of department of market of American Kennametal company thinks, the choice in milling cutter of manufacturer of turbine spare parts and applied circumstance are, different manufacturer processes same data, uses cutting tool may have very big difference. If a manufacturer uses modern equipment, the likelihood chooses to manufacture the cutting tool with tall efficiency, and a few old companies (the factory) that uses traditional positive drive machine tool, the cutting tool that may ask tenacity is better. In addition whether can be the cutting tool that sees place choosing even bought in the market.  normally, resemble the titanium alloy with industrial space navigation, ask cutting tool has bigger helix angle and bigger before horn, when this can make cutting tool is being machined, the attrition between cutting tool and workpiece falls to the smallest. S Hanita produced ′ of American Kennametal IPG a series of be used at alloy of high temperature of thick, finish machining, stainless steel and hard steel of temper by dipping in water establish milling cutter, can reduce handling time effectively. This kind call VariMill establish milling cutter integrated paraboloid chamfer form, not tooth of divide into equal parts, contain the part after can accusing (already had patent) of the design a few are nodded, the Scatt Walrath of vice president of company of resonance Dura milling cutter that because high speed machines quiver to bring about,avoided thinks, when processing foreign data, the cutting parameter that place of every kinds of circumstance uses is not identical. The person that use for the help chooses reasonable parameter, this company provided guide of user of a cutting tool. The person that this guideline guidance is used defines the material of a treatment through 5 measure. Choice cutting tool, affirmatory radial and axial are cut deep, recommend the cutting career that should choose in the begining and feed finally next. These results explain, different alloy material has different character when treatment. If should use a diameter to be 3/8 inch when TiAlN coating hard alloy establishs milling cutter to process data of 32HRC) of Inconel718(hardness > , radial, axial is cut deep recommend use 3mm, "Guideline " recommend feed to be 2ipr, exterior speed is 60sfm. On the other hand, when processing data of 32HRC) of Inconel600/625(hardness < , below the circumstance of same feed and cutting deepness, the alloy with recommends cutting stronger than machining those rate is tall 50% . If machined a few workpiece hind, did not see cutting tool wears away, add man-hour to did not produce noise, explain milling cutter job is good, still can increase its cutting rate 20% , the purpose is to get life of first-rate cutting tool, raise economic benefits. CNC Milling CNC Machining