外文翻译-计算机数字控制与数控编程

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1、外文资料译文TheCNCControlAndNCProgrammingTheCNCcontrolisnothingmorethantheCNCcontrolsystemwhichconsistsofbothhardwareandsoftware.ThereoncewasatimewhenaCNCwasresponsibleforlittlemorethanrelativelyslowaxispositioningandbasictoolmanagement.Asmachiningcentershaveevolved,however,axis-positioningrequirementsha

2、vedrasticallyincreasedwhiletoolmanagementandotherfunctionshavebecomevastlymorecomplex,demandingfargreaterprocessingpowertohandietheseandotherfunctions.Fasterprocessors,dualprocessorsandevenparallelprocessingaremethodsthathavebeenusedtoincreaseprocessingspeed.Buttoday'sCNCismorethanfast;itoffersmore

3、functionality,andautomationfeaturesthanever.Tooloffsetscanbesetwiththepushofonebutton.Servomotorscanbetunedonthefly.Brokentoolscanbedetected.Andpartscanbeinspectedonthemachiningcenter.Parallelprocessingtechnologyallowstheuseoftwoormoremicroprocessorstobeemployedsimultaneously.Thisisonewaytoalleviat

4、ethelogjamoftoomanytasksononeprocessor.Inthepast,wehaveadedicatedprocessorforeachaxistoenhanceprocessingspeed.Butit'snotjustamatterofmoreisbetter.TheoverallspeedatwhichaCNCsystemperformsisaffectedbyanumberoffactors,whichineludespeedoftheprocessors,architectureoftheCNC,aswellasthenumberofprocessors.

5、Supportedbysmartersoftware,someCNCsaremakingbetteruseofsensordatathathasactuallybeenavailableforsometime.Forinstanee,therearemanythingsthataloadmonitorcantellyouaboutthemachiningprocessjftheCNCHknowsHwhentoaskwhatkindofquestion.Somecontrolscanmonitorvoltagefluctuationtodetermineifatoolisbroken.Atar

6、elativelysimplelevel,讦thereisacuttingloadoutsideapre-establishedsetofparameters,theCNCknowsthereisacatastrophicproblemwiththetool,andshutsdowntheprocess.Amoresophisticatedmethodistowriteamacrothatmonitorstoolloadovertime,andthatcandeterminewhentochangeatoolbasedonmoregradualpatternsofwear.Evenmores

7、ophisticatedsoftwareusessensorfeedbacktoachievevaryingdegreesofadaptivecontrol.Forexample,toolloadcompensationisafeaturethatautomaticallychangesthefeedratesandreducescycletimebasedonspindleloadparametersset