数控技术专业英语 第2版 教学课件 作者 刘瑛 王莉 1_ CHAPTER12.ppt

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1、Unit12ToolRadiusCompensation第12单元刀具半径补偿ReadingTargetAfterreadingthisunit,youshouldbeabletoexplainthepurposeoftoolradiuscompensationandidentifythesituationswhenitisappropriatetoapply.Text12.1Whatistoolradiuscompensation?Toolradiuscompensationistheactofaccommodatingforthecuttingtoolradi

2、usinordertoproducetheworkpieceofthecorrectgeometry.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。Text12.2HowcutterradiuscompensationworksUnderstandinghowtheCNCcontrolinterpretsmotionsundertheinfluenceofcutterradiuscompensationshouldhelpyoulearnhowtouseitan

3、davoidproblemswithprogramming.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。Text12.2HowcutterradiuscompensationworksEither

4、thecutterwillbeontheleftside(G41)orrightside(G42)oftheworkpieceasitmachinesthecontour.Oncecutterradiuscompensationisproperlyinstated,thecontrolwillkeepthemillingcuttertotheleftorright(dependinguponyourchoice)ofallmotionsprogrammed.Thiscanbealittledifficulttovisualize,especiallyforbegi

5、nningprogrammers.加工轮廓时，刀具或者在工件左边（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。Text12.2HowcutterradiuscompensationworksTheCNCcontrolwillautomaticallykeepthecuttercenterawayfromtheprogrammedpathbytheamountofthespecifiedcutterradiuscompensat

6、ionoffset.Thisiswhatallowsyoutoprogramtheworksurfacecontourandletthecontrolfigureoutthecutter'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(no

7、ticethatpointoneisthecutter'scenterlineposition).Onceinstated,noticehowthecontrolwillautomaticallykeepthecuttertotherightside(inthiscase)ofallprogrammedmovements.Howmuchtotherightsideoftheworksurfacecontourthecontrolwillkeepthetoolisspecifiedinthecutterradiuscompensationoffset(thecutt

8、er'sr