Integral hard alloy establishs milling cutter and its application

Time:2023-06-29 13:51:42
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source:JUSTYN CNC Machining

If an user has but milling cutter of type of dislocation razor blade and hard alloy of a whole establish milling cutter (the following abbreviation " whole hard milling cutter " ) can offer an alternative, he can ask a fundamental question normally: Performance of which kinds of cutting tool is better? In what do they machine a domain to have an advantage more? This says with its is the problem of bad of what of actor of a what, be inferior to saying is each arrogate to oneself gets the better of the problem of field. The cutting tool that we must know specific kind has what different function characteristic, and to achieve favorable treatment result, should how reasonable use them. Bit type milling cutter is widely divergent with whole hard milling cutter in a lot of respects. Whole hard milling cutter used the base material that differs with bit milling cutter and coating type, make these two kinds of milling cutter show apparent function difference thereby. If be in some kind of specific treatment, among them the certain property of a kind of cutting tool becomes more important, so probably this kind of cutting tool suits this kind of treatment more. Generally speaking, compare with photograph of traditional bit milling cutter, the treatment precision of whole hard milling cutter should be gotten high much. Nevertheless, fact of this be related applies to cutting tool to machine medium expression in cutting only. These two kinds of cutting tool may have identical dimension accuracy class, but the steeliness knife handle that installs bit as a result of the rigid far outclass of material of integral hard alloy, in cutting force action falls to produce bending not easily to be out of shape when treatment, because this can obtain taller treatment precision. The osculatory arc length that needing another when remember well important fact is cutting tool -- a kind of specific cutting tool and the circumferential length that are contacted by treatment spare parts, the quantity of heat of the generation when it and cutting and the quantity of heat that are mixed to cut bits to absorb by cutting tool, workpiece are direct and relevant. Whole hard milling cutter and the characteristic that milling cutter of steeliness knife handle handles heat in metal cutting are disparate, this also can be mirrorred on the choice of cutting strategy. Undertake contrast for more comprehensive ground, return the diametical measure that must consider cutting tool. The category of small diameter milling cutter of 10mm is less than in the diameter, can see the sign of bit type milling cutter rarely, apparent, whole hard milling cutter is of course anthology. And in the domain of big diameter milling cutter that answers relatively to it, as a result of socioeconomic reason, whole hard milling cutter is not well-advised choice however. Diametical dimension 10 - the area that the medium norms milling cutter that 25mm controls is coexistence of a variety of fold of milling cutter type. Inside this limits, be become to choose the initiative basis of cutting tool by the complexity of treatment appearance, accessibility and treatment precision requirement. The processability that rectifies the base material of hard milling cutter to make hard milling cutter can depend on greatly the type that uses hard alloy base material. Base material crucial, because it must prop up the cutting blade of cutting tool,be, must bear very great cutting power, and the cutting tool damaged that must prevent any forms. To ensure milling cutter has enough tenacity, can offer good trends to fight force, whole hard milling cutter uses imperceptible grain hard alloy to serve as base material normally. This kind of matrix has taller hardness and better point sharp sex, still can maintain good tenacity at the same time. But, compare with the photograph of hard alloy matrix of groovy granuality, the thermal conductivity of imperceptible grain hard alloy (the ability that takes away quantity of heat from cutting area) opposite poorer. This is meant, the quantity of heat of the generation when cutting tool cutting often can is stationed in stay in cutting tool surface. Accordingly, the cutting blade of whole hard milling cutter must can bear this kind of heat in metal cutting, control osculatory arc length, this is a when the consideration needs from beginning to end when the choice makes hard milling cutter fundamental condition. The coating of whole hard milling cutter and cutting blade preparation to raise cutting tool wearability, the cutting division that will produce heat build-up to measure and segregation of cutting tool matrix leave (the accumulation of heat in metal cutting in matrix may shorten cutting tool life) , whole hard milling cutter should use coating normally. In addition, because the cutting blade of whole hard milling cutter is sharper, accordingly, appropriate adherent power is had between cutting tool matrix and coating crucial also. Especially for lesser to the diameter whole hard milling cutter, cutting blade is sharp a crucial essential factor that spending is function of cutting tool treatment. Blade of ideal cutting of whole hard milling cutter should be had as far as possible tall hardness, and can fall collapse blade risk to lowest proper and sharp degree. Pass reasonable cutting blade preparation, can achieve this one goal partly. Generally speaking, machine quality and level of cutting tool life according to what the requirement achieves, different whole hard milling cutter can use benefit of He Feng of appearance of type of different cutting blade preparation, point to spend. Cutting blade is cutting tool before face of the knife after knife face is mixed intersects form cross a line, adopt range of the knife after face of the knife before blade is ground is mixed, can obtain sharp cutting blade. If be directly on sharp cutting blade deposit PVD coating, coating interior can produce very tall stress. As a result of the influence of this kind of tall internal stress, easy when cutting burst mixes coating flake, shorten thereby cutting tool life. The quality of coating and effectiveness depend on its bear in cutting process and / or the capacity that reduces wear rate. Go up at cutting blade to make coating adheres to can firmlier, prevent cutting blade to produce damaged, be necessary to undertake aggrandizement to cutting blade (passivation) processing. In other words, machine stability and implementation coating function to ensure, must sacrifice one share point is sharp degree, and this can prolong cutting tool life again conversely. Can say even, cutting blade preparation exceeded matrix type and coating technology to the importance of whole hard milling cutter. Tell from logic, of this pair of whole hard milling cutter grind again have very big effect. After cutting tool is ground again, if incorrect its point undertakes passivation is handled afresh, make its regain initiative position, with respect to the total latent capacity that cannot develop repair cutting tool adequately. Accordingly, consider the initiative cost that whole hard milling cutter does not poor, will be engaged in cutting tool grinding business again by original tool manufacturer and the service center that its have aptitude crucial. The treatment strategy basis of whole hard milling cutter makes the dimension size of hard milling cutter and geometrical appearance, can differentiate its for a few kinds big, press different size range of pipe bent again fractionize is a lot of special group. The field uses in different cutting tool, horn of appearance of knife chamfer geometry, point of a knife, before the design characteristic such as the horn after horn is mixed, helix angle is producing main effect, make clear of all kinds whole hard milling cutter the area to come apart. The choice with this kind of politic to whole hard milling cutter and treatment classification has direct effect. So, choice which kinds of treatment is politic and best? This should depend on total treatment target: Your main purpose is utmost land raises productivity and spare parts yield, still reduce cutting tool as far as possible cost and simplify is cutting tool phyletic? In addition, this also depends on be reached by treatment spare parts to it all sorts of relevant element: Cutting tool is to be used at grooving, still use at side mill, two kinds of treatment hold concurrently and perhaps have? Those who need a consideration is final (but it is important least of all to be not) a problem is tie condition, for example: Does the potential process capability of the machine tool have how old? Does the clip of workpiece hold tigidity how? These element may make an ingredient into in the limit of, make you cannot use a few more advanced treatment strategy, or cannot use a few more efficient special whole hard milling cutter. The right choice of whole hard milling cutter depends on a variety of elements, the most important is to use right treatment strategy. Actually, below most circumstance, a lot of restricting the element cannot change: System of treatment machine tool, CAM and be being waited for by the material of treatment spare parts, dimension, public errand, appearance is given constant. Nevertheless, inside frame of existing treatment system, still can machine correctly through making strategy and use a variety of methods to affect treatment result, OK still the basis machines catalogue mark, through changing speed of feed rate, cutting and cutting deepness, undertake optimizing adjustment to cutting condition. According to the main attack direction of make choice of and technical strategy, OK and logical choice makes hard milling cutter. Clearly, have two kinds of possible kind that pick a knife: ① can pick a knife by processability, namely the basis processes a type (chamfer of the mill that be like side, mill or three-dimensional figuration milling) , choice utility is onefold special model milling cutter, in order to obtain optimum behavior; ② picks a knife by scope of application, choose sort namely less, but suitable scope is wider general-purpose milling cutter. Why to no matter use,plant the means that pick a knife, the user needs range of farther in norms of breed of existing whole hard milling cutter contractible choice. The whole hard milling cutter that special milling cutter and general milling cutter have 5 kinds of different kinds at present can be used at the groovy treatment of all sorts of metal stuff. Among them, the first kind of cutting tool makes hard milling cutter for generation, its history but restrospect to is small-sized the age that establishs milling cutter to basically use high-speed steel to make, backward already now outdated. In 20 centuries 70 time later period, small-sized the basic material that establishs milling cutter begins to be hard alloy by high-speed steel changeover character, but its typical geometry feature still the design that high-speed steel of continue to use establishs milling cutter, these designs suit the treatment task at that time quite. Nowadays, no matter this kind of cutting tool is price or function, be in the low end of market of whole hard milling cutter. The 2nd kind of cutting tool is high speed milling (HSM) whole hard milling cutter. With generation whole hard milling cutter differs, the HSM that basically is used at high speed milling rectifies modernization of hard milling cutter rate is very high, its model designs a characteristic is length of practicable cutting blade shorter, and course of cutting tool structure is optimized, but utmost land increases treatment stability. High speed milling can produce high temperature, and quantity of heat builds up normally be in place of point of a knife. Accordingly, to prevent happening of point of a knife plasticity is out of shape, HSM establishs milling cutter to use radius of bigger circular arc of point of a knife mostly. The 3rd kind of cutting tool is efficient milling (HPM) whole hard milling cutter. To cut deep, long contact greatly arc milling is machined and this kind of milling cutter is designed technically. Cutting deepness is efficient milling is main optimize parameter, mirror on design of cutting tool structure to use long cutting blade and cent bits chamfer namely, so that be handled better,cut bits in great quantities. Other and main structure essential factor still includes the helix angle of milling cutter and look bits slot. Increasing diameter of milling cutter core also is one of design characteristics of this kind of cutting tool, its purpose is to raise cutting tool stability and reduce bending to be out of shape. The 4th kind of cutting tool is big feed milling (HFM) whole hard milling cutter. This kind of milling cutter that designs for big feed milling technically is used very small cut deep quantity and very high workbench feed rate, the appearance of this cutting tool designs apparent report to give its to machine a purpose: The angle of cutting blade is very small, and the front that is located in cutting tool. Afore-mentioned the 2nd - 4 kinds of cutting tool (HSM, HPM and HFM make hard milling cutter) what attribute for specific treatment task development is special model milling cutter, although its base material and coating are likely also each are not identical, but the geometrical appearance of these cutting tool just is the mainest distinction essential factor. The 5th kind of cutting tool is to hold a versatility and high-powered new generation concurrently to make hard milling cutter. The size range of pipe bent with this kind of applicable cutting tool is very wide, it is good that at the same time its machine function integratedly to design generation of the technology to make hard milling cutter than be based on high-speed steel cutting tool much. The performance level photograph that although make hard milling cutter with HSM, HPM and HFM,machining a domain severally is compared, these are general-purpose milling cutter should inferior to prepare a bit, but design eclectically as a kind, they the virtue market a variety of special milling cutter at a suit, it is to mix model treatment and a kind of when diversification machines right fundamental choice. In a word, they are contemporary edition is general-purpose, muti_function whole hard milling cutter. What can exchange head of hard alloy knife is modular establish milling cutter to be mixed besides classical whole hard milling cutter, bit type milling cutter small-sized establish milling cutter beyond, still milling cutter of additionally one kind of hard alloy also can be used at same treatment field. These milling cutter basically can provide as same as classical whole hard milling cutter treatment performance, have again at the same time additional flexibility and taller modular level. This can change namely of head of hard alloy knife modular establish milling cutter. New generation can change head type to establish milling cutter in 20 centuries 80 time later period begins to cut a figure, its performance dominant position classical whole hard milling cutter (be designed like high accuracy, high strenth, advanced cutting blade and coating) the possibility volume that increases treatment stability with the steeliness knife handle that passes different length at a suit. This kind of milling cutter can use all sorts of different configuration kind, can be the snickersnee lever combination that exceeds stability already, also can be to be used at machining a standard to rectify the deep sunken pitch that hard milling cutter reachs hard or workpiece to suffer to be restricted the combination of lengthen taper arbor of place. This kind of milling cutter can change conveniently on the machine tool cutting head, and need not cost painfully again remeasure cutting tool mixes the ground to be opposite afresh knife. Modular the diametical range that can change knife head type to establish milling cutter is about 8 - 16mm, a lot of as enumerated as the article rectifying the size range of pipe bent of hard milling cutter overlaps each other, one kind when can make hard milling cutter as the tradition holds the beneficial complement that provides treatment feasibility and flexibility concurrently. Hard to all rectifying milling cutter and modular milling system, choose with accurate strategic method and applied cutting tool is crucial. To reach total treatment goal -- no matter be to improve treatment function, make spare parts crop the biggest change, still reduce cost of every cutting tool as far as possible -- right choice and applied cutting tool are the crucial place that makes hard milling cutter realize profitable treatment with high quality. CNC Milling CNC Machining