转子逆向过程是:
1、以两端圆和平面建立坐标系,两端圆连线确定Z向,XY零点,Z零点由平面确定
2、在转子同一侧分别在XY平面内从齿根到齿顶扫描两条线(ME2DE...),例如CURV1,CURV2
然后按照下面的程序计算导程(转子逆向主要是计算导程),原理是先定义一个圆,然后分别和两端曲线相交,利用交点的坐标计算导程,注意圆的半径要在齿根和齿顶中间
!define radius for lead calculation
RAD=35
!deine cirle CIR1 for intersection
DELELE (NAM=CIR1 N)
DFNELE (NAM=CIR1, TYP=CIR)
PUTVALS (OBJ=CIR1, TYP=ELE, RDS=(X,Y,Z,U,V,W,A), VAL=(0,0,0,0,0,1,2*RAD))
INCIR2DE (E2D=CURV1, INT=CIR1, IPT=PNT1, OPN=Y)
INCIR2DE (E2D=CURV2, INT=CIR1, IPT=PNT2, OPN=Y)
GETVALS (OBJ=PNT1.ACT, RDS=(X,Y), REA=(X1,Y1))
GETVALS (OBJ=PNT2.ACT, RDS=(X,Y), REA=(X2,Y2))
ANG$1=FACS(X1/RAD$)
IFEXEC (VL1=Y1, VL2=0, TYP=LT, CMD='ANG$1=360-ANG$1')
ANG$2=FACS(X2/RAD$)
IFEXEC (VL1=Y2, VL2=0, TYP=LT, CMD='ANG$2=360-ANG$2')
! Lead calculation
FCN2PA (NAM=DIFF$AZI, VL1=ZFAC*SGNHG*(ANG$2-ANG$1)+360, VL2=360, TYP=MOD)
LEAD$=ZFAC*(Z2-Z1)*360/DIFF$AZI
!show lead
LISREA (NAM=LEAD$)
3、扫描一个横截面槽,补偿RCORSC
4、MELEAD精测导程,计算实际导程
5、定义转子参数DFNPARSC,FMTOBJ导出横截面坐标点,然后再用OutParSC导出转子参数,打印PDF文件,逆向完毕