"EAx For HMC ZzxBm_XzxYxySt " it is a very peculiar string it seems that, it is a when identify place of source of error of machine tool function to need accurate symbol actually. A company is trying hard to evaluate and raise its to machine the effect, the named a convention to bring in an orderly way for this company efforts order that represents by place of this one example and clear idea. Spot an error correctly, the concept that accumulates function and error budget and so on to understanding put oneself in another's position is crucial. Our everybody has a name, without these names, mutual between very difficult communication. "EAx " also be a name. Company of Independent Quality Labs (abbreviation IQL company) it is what its say Parametric Error Name (the pronoun of parameter error, PEN of the following abbreviation) . IQL company is located in American Rockville city, it is manufacturer of a special help the inherent error that because place of a kind of error causes EAx,corrects machine tool interior. Cut truly with a kind and a system that the method that has logic will come to to name these the error, let IQL company can undertake effectively communication contact with its machine tool and productivity, production gives the part that can satisfy tolerancepublic errand dimension to ask. In this one example, EAx is a delegate the pronoun of error of angle of plane of axis of Y-Z of a machine tool. This one special error can make the axis produces slight twist in athletic process, direction of distance of abrupt deviate. This one special PEN is in no less than some axis caused a kind of error in athletic plane in that way, the relation between other axis also needs this axis and machine tool to try to identify through its name ability. Do not be clear about otherwise after all what place produced an error, or do not know why the meeting integral precision generation to the machine tool is planted influence. HMC (horizontal machining center) ZzxBm_XzxYxySt, basically use at describing a more complex horizontal machining center. Actually, because the configuration form of existing machine tool is infinite, the relation is different between every kinds of each axis that configures a form, accordingly, the system that establishs these names must be founded to identify these relationships countless appropriate, the name that accords with logic. IQL company owns a such systems, its name is called by all IQL Subclass Nomenclature child classification names a system. Different type (child classification) machine tool name according to its the different position form of each axis is classified. Each unique name elaborated the shape of a distribution of each axis, and will install in the workpiece in these forms at what position. This string of character represented HMC ZzxBm_XzxYxySt the structure of axis of root of the some in the machine tool, if the graph is shown 1 times, for the machine tool of each type configuration provided an exact name, what satisfy visible requirement more easily and solve place of intrinsic error of its structure interior to cause is wrong. In fact, the angle error on plane of this axis Y-Z (its name calls EAx) may bother a bit it seems that, because of the verticality of other axis in affecting this machine tool to configure. Mr Robert Buz Callaghan is the author of the senior engineer of IQL company and this company, already had 20 old rich experience, the character that knows coordinate to measure machine and machine tool very much (graph 2) . He explained why PEN and Subclass Nomenclature child classification names a system very main reason: "The machine tool is sophisticated Electromechanical construction equipment, whether can the spare parts quality that the intrinsic error of its structure interior decided to produce accord with specific tolerancepublic errand requirement, and achieve a design book a function. We must can explain these mistakes clearly, such ability understand better and undertake effectively handling. " Mr NextpageCallaghan says, the precision error that realizes a machine tool has very great real value. When the result that cannot provide a need when treatment craft for example, precision error can help manufacturer diagnose its prime cause, conduce to be new job or produce task lay a course newly, can make job shops gets more information, purchase in order to make decision-making. To precision problem discuss the view according to Mr Callaghan directly, the nicety of subdirectory names a system related the machine tool error of IQL company and of all kinds machine tool, build the base that be defined in ISO standard and ANSI standard and names a convention over. One kind the system that company place uses is these standard place proposals reforms and patulous system. He says: "These standards offerred good germinant, but still cannot include all errors, also cannot have all sorts of new-style machine tools easily classified. " what IQL company place uses is a few otherer modification program is very simple and economic, if use the character form of big lowercase and suffix and so on to express, can make the name is read more easily on the page with the explanation. Ensure add, use correctly of minus sign constant, in order to indicate right way, also be a crucial part of this system. Mr Callaghan introduced carefully proper use PEN and child the advantage that classifies a name: "Numerous PEN can communicate an important enlightenment: Even if the machine tool of the commonnest type, also involve the athletic error issue of different type. " he points out, 3 measured value that user of most machine tool considers machine tool precision is medium only -- the linear movement fixed position that goes up along X, Y and Z axis direction namely. The understanding that this means pair of machine tool precision and work skill power too simplification. For example, this one viewpoint ignored linear axis the causes by scroll, pitch and deflexion place angle error in athletic process. In a lot of respects, the machine tool is affected easily by the mistake of inaccuracy, this to error modelling for this kind of concept very important. Because when the machine tool each axis is in athletic condition when, technology of modelling of this one error can take occurrent overall picture. Mr Callaghan explanation says: "In reality, a lot of components of the machine tool can appear when motion a lot of subtle twist, roll and tilt phenomenon, however the error that its produce can make the direction of cutting tool causes tiny deflection. " the treatment quality that this kind of deflection often can affect a part. Diagnose the condition that causes an error and the ability that correct an error subsequently, have a very large dominant position, conduce to machine tool production giving the part that accords with requirement of tolerancepublic errand dimension greatly namely. He sums up finally say: "This industry must have a proper method that can name to the error, all errors that so that be described clearly,reflect in a of machine tool function omnibus model. " about child the name that classifies a system, namely the name of type of configuration of each machine tool, can comprise by same point. When the consideration is classified, the view that has two keys at least joins. Among them one is: The layout of each axis has the machine tool a variety of means, and these different arrangement can reflect a different performance characteristic. For example, on a kind of machine tool, the error of certain type and photograph of another some of error are compared may more general, or have bigger effect. Mr Callaghan explanation says: "No matter vertical machining center is of dragon door type,still be type of C form frame, metropolis influence needs to consider what error after all to us. " same, another main distinction that affects treatment precision is: Whether is the whirligig that machine tool place offers used workpiece tilts and rotate means, or it is main shaft head is used tilt and rotate means. An opinion closely related is: The relationship between each axis is crucial to knowing the property of the machine tool. In this one domain, the expert is what these concerns say " dynamic catenary " , and Mr Callaghan prefers to use " axial pile " this one term, because of it more conduce to hand relevant idea. In the nomenclature of IQL company, the name of every subclass, the ordinal list that basically is plane of way of an axis movement, arrange what appear according to them orderly early or late. Mr Callaghan says: "The name of every subclass founded to be described the circumstance of the machine tool. Want to remember this one image well only, the error pattern of this kind of special machine tool becomes visible figure more easily. " if the machine tool cannot provide the result of an expectation, so this one error pattern will conduce to machine tool operator or workshop director sees a problem go out after all in where. The content that includes in the name has a look above all " EAx " meaning: Be in IQL company in naming a system, "E " show error of a motion. This system sets, this error general with the deviation that be measured the form of two-way average bandwidth gives out (it is normally / negative worth) ; "A " show this is an angle error; And " X " express this axis the error that produces when moving along X axis direction. The other PEN of machine tool of this one type also will use same way to name. An error pattern of the machine tool, with the form of a form normally listed PEN is mixed numeric, the machine tool of this one type needs 28 PEN ability to spot the athletic error of all likelihoods. The place before be like is narrated, child the name that classifies a system makes clear, this is machine tool of a horizontal, deserve to one can reach to rotate from the workbench that moves to across at the same time workbench, tighten fixed workpiece with Yu Ga. Deserve to have the ram that can move up and down on pillar, drive main shaft and cutting tool to be mixed upcountry outward motion. Mr Callaghan described a scene that sets these tags correctly: "Let us have a workshop suppose, the workpiece that must move treatment on the machine tool carries the treatment on the different type machine tool with another work appropriate limits. The tolerancepublic errand size that if machine the spare parts that come out not to accord with the first machine tool from the 2nd machine tool,can reach quite asks, so the cause that this workshop causes this kind of result with respect to need understanding. Examine the error pattern of these two machine tools, will provide a clue to us, should check which motion error. If appoint,a new work is processed on original machine tool, can appear so another kind of scene, the certain treatment characteristic of the machine tool cannot satisfy requirement of tolerancepublic errand dimension. Below this kind of circumstance, error pattern will coach we locate the source of the error again. " of concerned volume problem discuss Mr Callaghan to say, the workshop that always is familiar with error of machine tool motion more and more, can master the more complex concept in machine tool metrology better. In these concepts among them one of it is volume performance issue, inside the whole job range that having main effect to error of angle of linear sum of errors namely, offer an omnibus assessment to machine tool precision (graph 3) . As " error acknowledge is spent " rise, another idea that can offer higher value for the workshop is about the error estimated problem, the advisability that this is difference of correct errors of a kind of correct manages a method. Concept of Nextpage volume performance is to point to normally " bulk precision " , place of no less than Mr Callaghan points out in that way, volume performance is a neuter term, do not mean the accuracy of foregone data or inaccuracy. Spend to the attention of volume performance at present taller and taller already. For example, a lot of workshops are seeking bed of large scale computer to machine make large work, make its are close to the requirement of tolerancepublic errand dimension more. Component of wind- driven turbogenerator and the development of components of next airframe of generation jet-propelled plane are a cause that causes attention. The high accuracy that other job shops begins to change direction to use clamping apparatus a future life to produce whole platoon on horizontal machine tool is small-sized spare parts, add man-hour to need the interpose of operator rarely. The 5 axes treatment of 3D outline also gains ground increasingly, this also is a main factor. These case explain, the requirement uses production of a machine tool to give geometrical appearance to accord with the spare parts that tolerancepublic errand dimension asks, the working range that although the position of the characteristic of the spare parts or spare parts surmounted his,can reach. According to the view of Mr Callaghan, the volume performance of a machine tool depends on greatly the angle error in axial motion. He says: "In the factory, machine tool manufacturer must take step, through controlling good manufacturing technology, reduce pitch, deflection and scroll error as far as possible. " when machine tool perch when, when machine tool operator must believe firmly the machine tool is being installed, had spent to its level undertook proper adjustment already was secured well on the foundation. Same, they also must understand the volume performance of the machine tool, master about implement the knowledge that defends the work daily and desired result technology appropriately. Mr Callaghan emphasizes saying: "Angle error is the key of production 3D excellent part, if diagonal spends an error to cannot try to control, cannot achieve repeat manufacturing precision goodly, automation production will fail. " one of runs IQL company major of precision cost are the error budget that helps its client develop manufacturing technology. The error is a kind to have calculative method to all source of error beforehand, place of no less than Mr Callaghan says in that way, the mistake is estimated the analysis is very precious, in the frame that because will affect all factors of tolerancepublic errand,combines to understand easily. The list means that the accumulation of the error in craft can differentiate through pressing all sorts of different error sources will express (graph 4) . Come from the concept say, error budget can be like a graph 4 begin to be made. The integral capacity that perpendicular row must reach on behalf of place of a craft, every part represented a variable social estate that causes an error, and the error can be accumulated stage by stage, everything what can use up craft place to allow, in order to satisfy the need that expectation is worth. Of the dimension of each parts and each grade variable overall accumulate an error, all ready to a function and for stable craft, the percentage that shows in legend is very typical. That is to say, use this one technology, the spare parts characteristic that can make its are produced accords with requirement of tolerancepublic errand dimension. Place of no less than Mr Callaghan points out in that way, when design or evaluating craft of a treatment, in planning personnel to should erect a kind to this, every part makes a budget. Heat up variable for example, opposite for its have very big effect to the error, include exterior factor, the sunlight that empty air temperature is spent or carries a window for example is right the influence of machine tool pillar; Include in-house factor at the same time, resemble drive electromotor or the quantity of heat that electric unit institute produces for example. Same, the bulk position performance of the machine tool also must make proper budget. Position performance must maintain the tight ness rating that comparative. This is meant, if take no account of other variable, must maintain taller than indicating precision precision so. To the public errand of every spare parts, still can have an error budget. Mr Callaghan says: "If appeared performance issue, we can use this one tool, help workshop decides to adopt mix the most effectively the most correct move. " for example, the method of IQL company is involved how to identify most the characteristic that comes true hard and public errand, it is what these weighing normally " production is crucial " , or abbreviation is CTM. The error budget of the machine tool is opposite with its the biggest impact of every CTM, use at the identifying of performance data. These are very crucial performance data, mr Callaghan regards his the essential element that scores a success. Below the circumstance that owns facility of an existing machine tool, this workshop can watch the error pattern that develops by IQL company, make reasonable decision-making. For example, should emphasize solve parameter error problem, limit the machine tool ability related to characteristic of specific spare parts. Such, error of parameter of a monitoring also can be built in order to preserve craft pilot strategy. According to the experience of Mr Callaghan, proving these strategy is very effective and of economy, on the foundation that often can let a workshop there is a machine tool in repair, continue to purchase a new machine tool. Same, the workshop sets out from the viewpoint that increases capacity, can use an error estimated means, refine the norms requirement of a new machine tool further. Be aimed at the norms requirement of the PEN related to CTM, can make sure its receive successful application. Happen unlikelily about the controversy of machine tool function, the craft ability that asks when place is shown when coming, the problem of these controversies can get easily settlement. Sober reflection and understanding " error budget can be shown sober reflection value and the clear communication about machine tool function, " Mr Callaghan summary says, "PEN and child classified system tag offerred an accurate vocabulary, it is OK to use this vocabulary more think clearly and discuss an issue. It is OK to use this vocabulary more think clearly and discuss an issue.. CNC MillingCNC Machining