Understanding " be based on intellectual treatment "

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Graph 1: Model of spare parts geometry must is the same as can machine diagnostic photograph correlation, and the operation that these features must have on the machine tool together again is relevant couplet. "Be based on knowledge to machine " the standardization that conduces to this process and automation have effective treatment with CNC equipment, the knowledge of the respect such as machine tool, cutting tool, clamping apparatus is necessary. CAM software develops business to roll out new process designing function ceaselessly, make these very important knowledge make the one part of CAM system automation. This kind of automation conduces to program of compact or integrated NC build a course, optimize treatment thereby. "Be based on knowledge to machine " this term often applies at such function, but the definition that does not have any standards or precise meaning. This term involves various capacity, its meaning because of the system different. A few kinds of methods come now token " be based on knowledge to machine " , overweight of some systems side " offer " treatment knowledge, overweight of side of another some of system criterion " get " treatment knowledge. Most system both all has. Same, some systems apt weaves by treatment working procedure knowledge, and apt of another some of system weaves by workpiece condition knowledge. Most system was not scrupulouslied abide by strictly among them which kind of means. Want to view system of a few CAM only, can discover current available " be based on knowledge to machine " functional limits. In the system that the article did not involve, also can discover other a lot of innovation. A bit must be remember well, "Be based on knowledge to machine " the effort that develops business on behalf of CAM, they make to the utmost CNC process designing member the job is more effective, more consistent, make CNC operation more effective, more reliable. Workpiece feature " be based on knowledge to machine " a common thought is a workpiece feature with treatment measure is contacted together. The feature is the geometrical appearance that a group of specific machine program can make on the spare parts, be like aperture, antrum, chamfer and protruding stage. The knowledge related the treatment process that is the same as these features can maintain existence database in, the process that this includes to machine spare parts feature to need and every working procedure machines parameter correspondingly. Spare parts geometry establishs the starting point that the model is CNC process designing, the user can use CAD tool to build a model according to blueprint inside CAM limits, also can input a model from exterior resource, for example from another CAD/CAM system. With geometrical means feature of denotive spare parts must try to mark correctly, and must handle photograph connection with corresponding treatment. The software of FeatureCAM series CAM of company of use Engineering Geometry Systems is wrapped, can see the fundamental that machines knowledge with geometrical feature correlation. This software uses blazing means to build a model - use a group of features to build model of spare parts geometry, and dimension data and other attribute are undertaken additive according to systematic clew by the user. This kind of means proposes groovy way of the model unlike selected element, line and circular arc greatly. When using FeatureCAM, the user uses systematic CAD tool or the geometrical feature that key in dimension to decide a part. Once the user indicates this spare parts to have groove, antrum, aperture or other feature, the system asks a question or offer an alternative, gather all necessary information that this feature is able to process with this, make automation of measure of the rest process designing. For example the spare parts needs to have a rectangle accent, the user can use CAD tool to build a rectangle, perhaps key in this model the dimension of antrum and position, next, systematic program enquires whether the user wants to add different element on groovy antrum, if pour horn or bottom,pour a circle. After waiting for an user to choose, the process adds these elements automatically model on antrum. Then, rate of feed of the rough machining that the program decides to every feature needs and finish machining operation, tool that chooses every operation, computation and speed, generate cutting tool method and aftertreatment NC code. Additional, although be in " be based on knowledge to machine " below the circumstance of process designing automation, featureCAM allows an user to modify a program. Automatic process designing is tried to control by attribute of a group of treatment, the user can undertake modification to attribute, in order to implement different cutting strategy. When input CAD file builds model of spare parts geometry, software identifies the feature with this corresponding spare parts automatically. Automatic feature identifies pair of FeatureMILL2.

5D is optional function, it is standard function to FeatureMILL3D. Automatic feature identifies a function according to " the spare parts builds automation of model, process designing with the feature " means, make the spare parts feature such as aperture, antrum and chamfer can machine measure photograph to contact together. Adopt package of this 3D software, undertake an analysis to spare parts model, find out all complex form that cannot try to identify as simple feature. The surface of these complex form is used as rough machining and the foundation with politic finish machining, and the processing technique that treatment strategy chooses with the user is a basis, fabricating of if transverse feed is thick mill, helix essence mill, steep taper and Z planar semifinishing machining. Knowledge is collected offer rate / feed leads database of data table, tool and other machine addend to occupy is " be based on knowledge to machine " a level, collecting treatment knowledge is " be based on knowledge to machine " another of the system powerful current. The GibbsCAM of company of Gibbs And Associates can undertake interesting " study " , the level that because this software can be in,differs " collect knowledge " . The treatment database that this software offers is ground floor, cutdata is allegedly optional the database has been typed 70, 000 many discrete data, make the numerical value such as deepness of means of cutting cutting tool, workpiece, cutting, cutting is the same as speed, feed numerical value of time of rate, time-out and other matchs. The user can be revised at any time and these machine augment data, make GibbsCAM " be based on knowledge to machine " the knowledge of the practice that software can win concerned treatment spot in this level and experience. The real key that knowledge collects is in additionally two levels, this software allows an user to build pattern plate of part program of much working procedure in next level. Actually, this one function of GibbsCAM calls multitask foreword process designing. For example, all detail that machine a kind of aperture (try auger, the aperture of bore, bore with a reamer, Huo aperture, norms that pours horn and place to require cutting tool and concerned treatment parameter) form a pattern plate. This pattern plate stocks a database, want to similar work comes up against this kind of aperture only, can call. Same working procedure set and identical treatment parameter can form a new part program, also can revise to such order and parameter. Still can use auxiliary pattern plate below appropriate occasion, can use a few pattern plate to establish a whole process. Pattern plate but knowledge of automatic repeated usage, and need not input mass data afresh, they represent the important conformity of process designing process. Besides pattern plate, lead the user to another level next. On this level, the system is gifted decision making authority. The system builds with the user " regular " undertake judging for the foundation, in order to embody the technology that user actor chooses. According to user regulation, the system chooses cutting tool of working procedure measure, cutting, speed and feed rate automatically to wait, have consideration and use computational result. For example, its setting according to the user, with the per cent of cutting tool diameter the setting suspends time, and increase to leave even cutting surplus to finish machining thick cut compensation. Business of intellectual Esprit development is right " be based on knowledge to machine " foreground was made look into interestingly, esprit is the CAM software that DP Technology company develops. This company thinks " be based on knowledge to machine " not only farther to process designing automation produces crucial effect, and the innovation conception that makes machine the spot is able to come true, be like STEP-NC. Below type of this one party, "Be based on knowledge to machine "" to be mixed to organization, management repeat application to machine measure to have the greatest value, agree with ability of dislocation of complex, need machines geometrical feature a few flank or the part that need a lot of different operations. Accordingly, "Be based on knowledge to machine " will evolve to plan a form for a kind of advanced treatment. On this meaning, treatment plans a treatment place of spare parts of a finished product must all operations rise integratedly; Collect the detailed data that processes feature of every spare parts together, form " treatment plans " , it includes to machine cutting tool of periodic, cutting and the cutting strategy that create place of cutting tool method to use. Graph 2: "Be based on knowledge to machine " becoming a kind of treatment to plan a form in development, use it, can manage by the most reasonable form and weave cutting is operated to distinguish what feature is in by cutting, how cutting and use what cutting tool, esprit " be based on knowledge to machine " project manager designed " the feature is cultivated " , how does the specification that use a figure differentiate workpiece to be able to machine a feature, mix like aperture, chamfer model antrum. There is a cutting to operate subdirectory below every feature, the operation that lists this feature place needs. Each operation in subdirectory also has a subdirectory, with the cutting tool that in express cutting tool library, has been chosen. Down the branch of this tree, the user can be checked, change or the treatment of this spare parts plans reorder. Treatment plans to be able to be saved and revising later, so that be similar work,establish treatment plan. Additional, different treatment can be combined together circularly, fashion the standard process of a certain feature. After treatment plans to finish, programmer makes way of corresponding G code cutting tool through key-press. Have sth in mind of DP Technology machinator did not come, they standardize to use but crossing-over format builds model of digital type product, plan the treatment that building to look the one part of design and project research. This kind of format calls STEP-NC. Just as its name implies, the final process that STEP-NC asks to make way of G code cutting tool maintains stop, till the workpiece of correspondence of this product model is about to be on CNC equipment,machine. Be based on the feed rate that the example that knowledge machines optimizes truly: Feed rate is optimized is the process designing technology that seeks rate of the most effective feed, optimize a process to as material excision is measured and adjust feed rate of way of cutting tool way. The Mastercam of CNC Software company is offerred " intelligence " feed rate optimizes a function, it leads the limit to undertake modulatory to feed rate according to machining the actual feed of spot machine tool. Mastercam can divide pace guiding user to finish affirmatory the biggest feed to lead ultimate process. From look substantially, this process is to be on work of a trial cutting is circumferential, raise feed rate to repeat cutting gradually next, lead the ability that is more than machine tool servo till feed. The feed that this value gives this the machine tool on behalf of software leads upper limit. Mastercam uses this kind of knowledge, excise a quantity to undertake optimizing to 2 axes or method of 3 axes cutting tool according to material: Cutting tool is when cutting surplus is larger speed of rein in feed, feed rate is accelerated when cutting surplus is more shallow, but will never be more than the limit that tries cutting input. Same, be in included angle place, feed speed will be decelerated, make cutting tool safety enters included angle well and truly, return optimal rate again next. Because feed rate is decided by real property feature, is not theoretical value, because this is optimized to assuring cutting tool life, reducing a machine tool to wear away is very effective, still can shorten effectively of course total cutting time. Blame programmer uses CNC: Occasionally, process designing personnel is busy cannot extricate oneself, with respect to need personnel of blame process designing participates in process designing. The is based on knowledge PowerMill AutoCAM software that Delcam develops, can simplify already process designing, can raise cutting tool way again make career. Existing " be based on knowledge to machine " the system identifies according to the feature mostly, make every geometry element (like stage of Kong Huo protruding) be able to machine below means of the standardization with can be in certain, automation. PowerMill AutoCAM additional monarch paths, it undertakes an analysis to all surfaces of CAD model, use analytic eventuate next the treatment method with whole job the rightest choice. The user uses this software, simply inputs the CAD model that needs treatment, specify the specification of material semifinished product, choose a machine tool, include the cutting tool method that requirement high speed machines, still be the cutting tool method of groovy operation. This software will choose cutting tool and cutting strategy automatically, make cutting tool way and undertake an aftertreatment to its, beardless user intervenes further. Whole process uses a few minutes at most, under photograph comparing, when using groovy CAM system, skilled programmer should spend a lot of hour ability to finish probably. 100% agree with aperture treatment: Aperture treatment is the most frequent working procedure, also be " be based on knowledge to machine " advanced place. The advanced Kong Jia of Advanced Hole Processing(that the SurfCAM of Surfware company offers is versed in) automatic bore software, allow an user to incorporate many loops operation the process that is to be able to be called repeatedly, with the executive time of managing repeatability task. The user has many choices orderly to how controlling the treatment of a series of aperture, "Category - ordinal " option includes: The user defines " artificial classification " , " the shortest (Kong Jian) be apart from " and " linear classification " , bore controls inside the bandwidth limits that this option makes the user can set in its advocate direction and rank take way. "Computation " key becomes every to plant with a future life sequential cycle time, make the user can contrast every process, make the choice that suits most. Optional function " exact pattern " the feed rate that can set according to the user and distance move at the same time two axes coordinate, such, cutting tool is close to every aperture from same way, can eliminate " tine is unoccupied place " error, the fixed position that assures all aperture is in of the machine tool repeat precision limit range inside. CNC Milling