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时间:2020-03-08
《数控技术专业英语 第3版 工业和信息化高职高专十二五 规划教材立项项目 教学课件 作者 闫帅经 卢艳 邢希英 CHAPTER12.ppt》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、Unit12ToolRadiusCompensation第12单元刀具半径补偿ReadingTargetAfterreadingthisunit,youshouldbeabletoexplainthepurposeoftoolradiuscompensationandidentifythesituationswhenitisappropriatetoapply.Text12.1Whatistoolradiuscompensation?Toolradiuscompensationistheactofaccommodatingforthecuttingtoolradiusinord
2、ertoproducetheworkpieceofthecorrectgeometry.12.1什么是刀具半径补偿刀具半径补偿是一种调节刀具半径的行为,其目的是使加工出来的工件具有正确的几何形状。它通常也被称为刀具补偿或刀尖圆弧半径补偿。Text12.2HowcutterradiuscompensationworksUnderstandinghowtheCNCcontrolinterpretsmotionsundertheinfluenceofcutterradiuscompensationshouldhelpyoulearnhowtouseitandavoidproblems
3、withprogramming.Inbasicterms,youwilltellthecontrol(byaGcode)therelationshipofthemillingcuttertotheworkpieceduringthemachiningoperation.了解CNC控制器在施加刀具半径补偿时如何编译运动,,将十分有助于了解如何在程序中使用半径补偿并避免出错。简单地说,程序员需要告诉(通过G命令)控制器加工过程中铣刀和工件的位置关系。Text12.2HowcutterradiuscompensationworksEitherthecutterwillbeonthel
4、eftside(G41)orrightside(G42)oftheworkpieceasitmachinesthecontour.Oncecutterradiuscompensationisproperlyinstated,thecontrolwillkeepthemillingcuttertotheleftorright(dependinguponyourchoice)ofallmotionsprogrammed.Thiscanbealittledifficulttovisualize,especiallyforbeginningprogrammers.加工轮廓时,刀具或者在
5、工件左边(G41),或者在右边(G42)。合理设定半径补偿后,铣刀完成程序中要求的所有动作时,控制器都要求它处于刀具的左边或者右边(根据程序员选择)。这可能有点难以想象,特别是对初学编程者而言。Text12.2HowcutterradiuscompensationworksTheCNCcontrolwillautomaticallykeepthecuttercenterawayfromtheprogrammedpathbytheamountofthespecifiedcutterradiuscompensationoffset.Thisiswhatallowsyoutoprog
6、ramtheworksurfacecontourandletthecontrolfigureoutthecutter'scenterlinepath.CNC控制器会自动让刀心偏离编程轨迹,偏移的尺寸为特定刀具半径补偿偏置量。正因为如此,我们才可以直接对工件表面进行编程,而将计算刀心轨迹的工作留给控制器。TextInthisexample,cutterradiuscompensationwillbeinstatedduringthemovementfrompointonetopointtwo(noticethatpointoneisthecutter'scenterlinepos
7、ition).Onceinstated,noticehowthecontrolwillautomaticallykeepthecuttertotherightside(inthiscase)ofallprogrammedmovements.Howmuchtotherightsideoftheworksurfacecontourthecontrolwillkeepthetoolisspecifiedinthecutterradiuscompensationoffset(thecutter'sr
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