Suit oneself accuse to add a system from 2O century begin to use at the beginning of 60 time, but inside the time that goes a few years, the increased the emerge in large numbers that reachs low computer memory to had increased to use system of this kind of control greatly ceaselessly good point of microprocessor speed. Popularly, these advantages include to reduce cycle time through optimizing cutting tool load, prolong cutting tool life through preventing cutting tool damaged, change a knife needlessly through eliminating and make up short safeguard and machine down time, drop spare parts temperature, those who reduce a hand to move part program to optimize is necessary, reduce reject and do poorly done work over again to wait. The power load that gets used to treatment to control a system to use sensor to measure main shaft electric machinery oneself and adjust feed speed, realize successive load thereby. It is equivalent to machine tool operator adjusting ceaselessly feed speed in order to maintain constant power load. Just this kind adjusts is undertaken automatically by the system. Can change to load with small second speed from adaptive control system make answer, and human operator wants normally a little a few slower. So optimize software photograph to compare from adaptive control system and cutting tool method, is there toot some advantage? Current certain CAM and software of CAM test and verify contain cutting tool method to optimize a function in its interior. Cutting tool way can be defined in cutting a collection of illustrative plates paragraph, maintain on cutting tool constant and laden, right every cutting paragraph be based on specific cutting condition and self-adjusting feed speed. The condition of its body cutting that software can be based on every paragraphs and assign cutting tool method and feed rate, include to cut width of deep, cutting and cutting angle to wait. Software of test and verify still has another advantage, check the integrality of cutting tool method before beginning cutting namely, discover any possibilities, the mistake with high price. Regretful is, these software products and any its code are nonexistent have any self-adjusting mediums in the light of a large number of common conditions that cause a knife. Inhomogenous, cutting tool wears measure of the change that these states include material hardness, work and face with, change of the temperature in cutting process and those who place its is not stable etc. Break a knife to because these states arise,avoid, programmer must use the feed rate that uses below worst circumstance to assure to compare safety, but the cutting process with inferior efficiency. Even so, still also put in the likelihood that breaks a knife, machining especially when what a large number of tough metals using now in all sorts of products. And from adaptive control OK however and safe the state that answers these likelihoods, maintain at the same time from tall metal excision is led. It is not to optimize with software of test and verify replace, however of machine tool controller outspread, all sorts of change that make the machine tool can answer software to cannot be handled. From adaptive control system the working principle from adaptive control system from adaptive control the function that is the existence in supervisory system of certain cutting tool is outspread. The data-in of can build an associate with machining center from adaptive control system sensor of main shaft load of a model perhaps changes from what add send implement the power that collect data and measures main shaft electric machinery is laden. The user makes up the power that decides ideal to be worth in the light of some specific cutting, and the system undertakes controlling to feed speed fold, in order to keep constant power. Until before before long, return from adaptive control system very complex, and very difficult process designing. But nowadays, these systems deploy a graph to show, can show the feed speed that bring to bear on and the power that use currently are worth. Operator can rise through pushbutton or reduce feed speed fold. In addition, can undertake proper process designing to the controller of the machine tool, let it puts through in aleatoric dot and be shut from adaptive control function, every cutting tool still can go up to assign this function to the machine tool in the meantime. Adopt cutting tool supervisory system, machine tool operator can install laden doorsill to be worth etc parameter, assure to issue warning and stop a machine tool when exceeding a doorsill to be worth. But, can adjust however from adaptive control system feed speed, prevent cutting tool to reach value of this kind of doorsill. Although a large number of companies make controller of cutting tool monitoring, but merely only a few still is offer at the same time from adaptive control option. The president Rob Caron of company of Caron Engneering engineering says " when machining forging and cast, from adaptive control particularly useful. We have some of client to discover harder metal in cast piece -- drop melt cast-iron medium steel nut and bolt. This metalloid is come up against in broach or milling cutter piece when, cutting tool can rupture normally, but meet however from adaptive control system instantly the induction arrives the difference of hardness respect, lower feed rate next, passed hard spot till cutting tool till. Although there is accident nugget in the metal, the hardness of cast changes extremely easily also be as high as 300% , and can adjust from adaptive control system feed speed changes with answering this to plant. We get a town to aviation -- if General Electric Company reachs Pratt&Whitney -- sell a large number of from adaptive control system. The metallic hardness that they machine is very tall, so that be in odd in second cutting, cutting tool can become blunt. When producing this kind of situation, cutting tool may rupture in cutting process, bring about reject or do poorly done work over again, but have the aid of from adaptive control. Feed speed can be decelerated, make sure the cutting tool that becomes blunt can finish cutting. " the Caron of cutting tool supervisory system of Caron Engneering says: "Several companies produce cutting tool supervisory system, but they are not involved however from adaptive control. Every person that has cutting tool supervisory system likes our system, they are bought increasingly, pack more and more machine tools. Some works are completed in university lab, but they try to will get used to a technology to bring a kind of exorbitant level oneself, among them they combined acoustics technology, adjusting feed speed while speed of modification main shaft. Both such give attention to two or morethings increased complexity, and controller cannot undertake possibly also to this enough answer, with enough adjust quickly feed speed. Be in all in getting used to cutting oneself, 90% OK and simple ground realize 80% ～ through be based on speed of power adjustment feed. " the Mark Brownhill of manager of productivity solution product of GE Fanuc says: "It is OK to be based on speed of power adjustment feed a lot of value produce below the case that need not cost very high cost. But we are using high speed machine tool to learn a function oneself now, will inspect servo among them specific to some spare parts will produce what effect, and if it discovers occurrence resonance, can be compensated or forecast a gender speed of ground adjustment feed. In order to keep away from such state. These systems need higher memory capacity, and till the memory with medium recently controller ability price is likely, can assure cost effectiveness. " Smith&Wesson Firearms(www. Smith-wesson.
Com) is in what its use Caron on 28 machining center from adaptive control system. Smith&The Richard Picard of new technology manager of Wesson says: "We are in the time that goes 15 years, use cutting tool life to run software all the time, if your knife is ground badly,all is, or your tool supplier offers different bit to you, so be in occasionally before booking cutting time to did not arrive, cutting tool can rupture. And get used to a function to be able to prevent this however oneself. Nowadays, never produce knife phenomenon almost. Can be in hard alloy broach undertakes 10 times on He Lixi knife or of 10 above grind again. Press life of minute of metric cutting tool, use function of cutting tool monitoring, before cutting tool becomes blunt truly, it can spark call the police, the machine tool stops machine. If an operator is operated 5, 6 machine tools, so operator is sure be changing a knife constantly, some machine tools can stop machine wait change a knife. Have more very person, when with maintenance edge is run, the cutting tool of damaged may cause machine tool damage, destroy a machine tool to operate time and productivity. But, to from adaptive control, it can adjust however feed speed, won't achieve thereby call the police speed, contrary meeting reminds operator to change a knife. Bite so in order to improve the efficiency of operator. " basically be in from adaptive control the crude hit the point that does not pay attention to exterior Xu coarse to spend is used, but Smith&Wesson also is used in finish machining however. . Picard says " we are in already rough machining, also use on finish machining cutting tool from adaptive control. We are factories of a productivity, the OK and fast finish machining that make and rough machining use tailor-made cutting tool. " although damaged of precautionary cutting tool is the main good point from adaptive control system, but all companies that produce this kind of system claim they still can reduce cycle time. Safeguard the applied engineer Steve Blum with public technology to say: "General part program can let cutting tool stand by quickly await treatment data. Before beginning cutting next, suspend one small conference. And answer time newly to weigh class for fine long hair from adaptive control system, because this need not pause, because once come up against material brim, feed speed can lower an appropriate rate instantly. Have a client discovery that produces part of small-sized medical treatment, pause through avoiding this to plant, the handling time of every spare parts can shorten greatly. " besides reduce or avoiding unnecessary treatment to pause. If the condition allows, this kind of system still can raise feed rate, reduced cycle time further so. Caron, GE Fanuc and can be added what safeguard technical company to offer to the machine tool from adaptive control system and join with the existing controller of the machine tool. Hai Dehan is in directly its are built newly in the series of ITNC 530 controller that roll out have its from adaptive control function. Chris Weber of market department manager says: "From adaptive control a kind of solution that is company interior development, and be the component of a whole of ITNC 530 controller. The user can put through with M code instruction and shut from adaptive control, OK perhaps appoint in the light of the load that is increased on specific cutting tool and feed speed get used to feed control oneself, can set appropriately besides parameter, in order to ensure current cutting tool chooses a new cutting tool when the load that go up is too high. All process data shows the screen in controller to go up, need not deploy a PC to get all information thereby. " the client can be ordered already was enabled or did not enable the ITNC 530 from adaptive control function. If this function also is started after them, can input a code words to come true through buying. Maintain the system of technical company, it is 9000 ～ to the quote of every machine tool 14000 dollars, particular value inspects the machine tool of installation and decide. The quote of Caron Engneering is 12000 dollars left and right sides. Of Hai Dehan it is 5400 dollars from price of adaptive control option, but the user still must buy controller of an ITNC 530 from its, the price is between 30000 dollars of 4000 ～ , provide stereo model and decide. CNC Milling
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