外文翻译--基于制造特征的三轴高速铣削数控自动编程技术（有word版） .pdf

j u n 2 0 0 7 tr a n s a c t i o n s o f na n j i n g un i v e r s i t y o f ae r o n a u t i c s 8 l as t r o n a u t i c s vo 1 24 no 2 m ach i ni ng feature bas ed 3 - axi s autom ati c nc program m i ng for hi gh s peed m i lli ng su n qu a n pi n g ，w a n g to n g y u e ，li a o w e h e 2 ，he n i n g。 ( 1 di g i t a l m a nu f a c t ur i ng te c hno l o gy lab，hua i yi n i ns t i t u t e of te c hno 1 o gy ，hu a i a n，2 23 00 1，prchi na； 2 co l l e g e o f m e c h a n i c a l a n d el e c t r i c a l en g i n e e r i n g，nuaa ，2 9 yu d a o st r e e t ，na n j i n g，2 1 0 0 1 6，prc h i n a ) ab s t r a c t ：ma c h i n i n g f e a t u r e s o f t h e wo r k p i e c e a r e d e s c r i b e d b y u s i n g o f t h e o b j e c t o r i e n t e d( ( ) 一0 )t e c hno l o gy be dme t nc a j ma c hi ni ng f e at u r e s ar e r ec og ni z e d i n t he g i v e n c u t r e g i on b y u s i ng t h e ma xi m u m me mbe r s hi p p r i c i pl e a bo ut t he f u z z y s e t de pe ndi n g on t he i f then r u l e a nd t he f uz z y ma t c hi ng me t ho d ，t he r ou g h i nf or ma t i on o f t he ma c hi nl ng p r o c e s s f o r hi g h s pe e d mi l l i n g( hsm )i s ex t r a c t e d ba s e d on t he d at a b as e of ma c hi ni ng pr oc e s s f or hs m th e o p t i mi z a t i o n mo d e l o f ma c h i n i n g p r o c e s s s c h e me i s e s t a b l i s h e d t o o b t a i n s h o r t e r c u t t i me，1 owe r c o s t o r h g h e r u r f a c e q u a l i t y i t i s h e l p f u l t o f o r m s u c c e s s f u l c a s e s f o r hs m nc p r o g r a mmi n g f o r hs m i s r e a l i z e d a c c or d mg t o o pt i mi z e d ma c hi ni ng pr oc es s da t a f r o m hsm c a s e s s e l e c t e d by t he opt i mi z a t i o n mo de 1 a nd t he ex- t r a c t e d i n f o r ma t i o n o f ma c h i n i n g p r o c e s s ke y wor d s：hi gh s pe e d mi l l i n g；ma c h i n i n g f e at u r e；p r o c e s s kn owl e dg e；nc pr o gr a m mi n g clc nu mbe r：tp3 9 1 73 do c ume n t c od e： a ar t i c l e i d ： 1 0 05 1 1 20( 2 00 7) 0 2 01 50 0 7 i ntroducti on th e i mp o r t a n c e o f i n t e g r a t e d cad cap p cam s y s t e m i s wi de l y a c c e pt e d b y m o s t man uf a c t u r i ng e nt e r pr i s e s m a n y r e s e a r c he r s pr e s e nt e d t h e mo d e l s o f i n t e g r a t e d cad capp cam s v s t e m ba s e d o n t h e f e a t ur e e 一 bu t t he i nt e gr a t i on o f cad capp cam i s v e r y d i f f i c u l t f r o m t h e s t a nd po i n t o f de s i g n a nd ma n uf a c t u r i ng as po p ul a r ug ， ci m a t r on， m a s t e r c a m e t a i ， t he s e cad c am s y s t e ms o n l y d e r i v e t h e t o o l p a t h a u - t o ma t i c a l l y f r o m t h e g e o me t r i c a l i n f o r ma t i o n thi s ki n d o f a r r a n ge me n t i s n o t e s s e n t i a 1 1 v i m p r o v e d t o t he gr a de of a ut oma t i on a n d kn o wl e d ge fo r t he n e a r t wo de c a de s ，h i gh s p e e d ma c h i n i n g ( hs m ) t e c h n o l o g y h a s b e e n wi d e l y us e d i n m a ny i n du s t r i e s i t ha s ma n y ma c hi ni n g a dv a nt a g e s e s p e c i a l l y t he b e t t e r p r og r a mm i n g c ha r a c t e r i s t i c s of hi gh s a f e t y，hi gh p r o du c t i v i t y， g o o d pr o c e s s i ng pr o pe r t y a nd s o o n so a 3 - a xi s a ut o m a t i c p r og r a mm i n g t e c h no l o gy ba s e d on ma c hi n i ng f e a t ur e s i s pr e s e n t e d f or hsm t o i mpr o v e t h e de g r e e o f a ut oma t i on a n d kn owl e dg e，a nd a n ha n c e ma c hi ni n g e f f i c i e n c y 1 expres si on and i denti fi cati on of m achi ni ng fea tures 1 1 ex pr e s s i o n of ma c hi ni n g f e a t ur e s i n g e n e r a l ， t h e ma c hi n i n g f e a t ur e s of pa r t c a n b e di v i d e d i n t o g e o me t r i c a l ma c h i ni ng f e a t ur e s a n d n on g e ome t r i c a l ma c h i ni ng f e a t ur e s to i n c r e a s e t he r e p e a t a bi l i t y a n d e x p an d a bi l i t y， t h e ma c hi ni n g f e a t u r e s ar e d e s c r i be d by t he o b j e c t o r i e n t e d( o o)t e c h n o l o g y i n hs m g e o m e t r i c a l ma c h i ni ng f e at ur e s i n t he c ut r e g i o n a r e ge ne r a l l y d e f i n e d a s po c k e t a n d c on t o u r the r e - l a t i o n a mo n g p o c k e t a t t r i b u t e s i s s h o wn i n f i g 1 f o u n d a t i o n i t e ms ：s u p p o r t e d b y t h e na t u r a l s c i e n c e f o u n d a t i o n o f j i a “ g s u p r o v i n c e( bk2 0 0 6 0 6 0 )；t he na t u r a l sc i e n c e p r o g r a m f o r ke y ba s i c re s e a r c h o f j i a n g s u pr o v i n c e( 0 6 kj a4 6 0 0 5 ) re c e i v e d da t e：2 00 6 0 6 - 27；r e v i s i o n r e c e i v e d d at e：200 7 0 3 20 e ma i l ： s u n q u a n p i n g ： s o h u c o m 维普资讯 no 2 s u n qu a n p i n g。e t a 1 ma c h i n i n g fe a t u r e ba s e d 3 - ax i s au t o ma t i c nc pr o g r a mmi n g 1 5 1 pa t e r n a l i nt e r f a c e ：c i l t r e g i o n nu mbe r m i n i mum m i n i m u m m in imum mi n i mu m po c k e t he i g h t o f ma n s i t i o n bo t t 咖 d i s t an d i s t a n c e r a il s i t i o n r a d i u m s h a p e b e t we e n b e t we e n r a d i u m a t i s l a n d s e d g e s i s l an d an dpo c k e t t h ei s l a nd s b o so m s u bc l a s sint e r f a c e ： i s l an d fi g1 m od el of p o ck e t mac h i ni ng f e at ur es 1 2 i de nt i f i c a t i o n of ma c h i n i ng f e a t u r e s the i de nt i f i c a t i o n o f p o c k e t a n d c on t o ur c a n b e c a r l q i e d o ut b y t he i nc l us i o n r e l a t i on be t we e n t h e h or i z o nt a l bo un d a r y i n t he c ut r e gi on a nd t he h o r i z o n t a l p r o j e c t i o n b o u n d a r y o f t h e ma x i mu m b ou n de d b o xi f t he l a t t e r c on t a i n s t h e f o r m e r i t i s p o c k e t ，o t h e r wi s e ，i t i s c o n t o u r th e b o t t o m s h a pe，he i ght a n d t r a n s i t i o n f i l l e t i n g of ma c hi n i n g f e a t u r e s c an b e ob t a i n e d f r o m t h e i nt e r s e c t i o n o f t he no r ma l p l a ne a n d c ur v e d f a c e s i n t he c u t r e gi onth e mi ni m u m di s t a n c e b e t we e n po c k e t a n d i s l a nd， t he m i n i mum d i s t a nc e b e t we e n i s l a n ds， a n d t h e g e n e r a l ma c h i n i n g - f e a t u r e s i n t h e c u t r e g i o n c a n be de r i v e d f r o m t he f o l l o wi ng a l go r i t hm 1 2 1 c a l c u l a t i o n o f mi n i mu m d i s t a n c e b e t we e n g e o m e t r i c a l ma c hi n i ng f e at ur e s 1 2 1 1 ca l c ul a t i o n o f m i n i m u m di s t a n c e be t we e n p o c k e t a n d i s l a n d ( 1 )ca l c u l a t e t h e ma x i mu m b o u n d e d b o x f o r p o c k e t a n d a l l i s l a n d s( s e e fi g 2 ) ( 2 )obt a i n t he i s l a nd t h a t l oc a t e s a t t he f o ur e x t r e me p l a c e s o f l e f t ，r i g h t ，u p p e r ， l o we r i n p o c ke t ( 3 )ca l c u l a t e t h e mi n i mu m d i s t a n c e d b e fi g2 p oc ke t a nd i sl a nd s t we e n p o c k e t a n d i s l a n d( s e e fi g 3 ) ( 4 )de t e r mi n e t h e mi n i mu m d i s t a n c e d p o ic k “ 一 mi n , l e f t ， d r i s h ， ov e r ，d a o w “ ) 1 2 1 2 ca l c u l a t i o n o f mi n i m u m d i s t a n c e b e t we e n i s l a n ds ( 1)ca l c ul a t e t he numb e r o f i s l an ds n i n t he i s l a n d c ha i n l i s t an d i ni t i a l i z e t he m i n i mum di s t a n c e d a n d v a r i a b l e i( 1， 2 ， ， n 1 ) i f n 一 0 ，t h e n j u mp t o( 7 ) ( 2 )0b t a i n t h e f i r s t i s l a n d i n t h e i s l a n d c h a i n l i s t i n t h e g i v e n o r d e r( s e e f i g 2 ) ( 3 )n 一 一 1 7 i f i t i s ，ye s ，t h e n j u mp t o ( 7 ) ；i f i t i s 1 o ，g o t o n e x t ( 4 )ob t a i n t h e i t h ( 1 )i s l a n d i n ( n 一 1 ) i s l a nd s ( 5)ca l c u l a t e t he d i s t a nc e b e t we e n t h e i t h i s l a n d a n d t h e f i r s t i s l a n d th e p r o b l e m i s a l s o s o l 一 粤 粤 圉 维普资讯 1 5 2 tr a n s a c t i o n s o f na n j i n g un i v e r s i t y o f ae r o n a u t i c s as t r o n a u t i c s vo 1 2 4 fi g3 fl o wc h ar t of dm m c a l c ul a t i o n v e d by t h e di c h ot o my me t ho das s u m i n g t ha t t he o f f s e t d i s t a n c e( o d )o f e d g e l o o p i s h ，o f f s e t o ut wa r d t h i s i s l a n d e dg e l o o p， t h us ge n e r a t i n g t h e of f s e t e d g e l o op p t 1 ，a nd of f s e t ou t wa r d t h e i t h i s l a nd e d g e l o op，t hu s ge n e r a t i ng t h e o f f s e t e dg e l o o p lp the me t h od of c a l c ul a t i n g d b e t we e n i s l a n d s i s t he s a me a s t ha t of c a l c u l a t i ng d b e t we e n p o c ke t a n d i s l a nd ( 6 )i n一 1 7 i f i t i s - g e s ” ，d e l e t e t h i s i s l a n d f r o m t h e i s l a n d c h a i n l i s t ，r e t u r n t o( 1 ) ；i f i t i s no ” ，l e t i i + l ，r e t u r n t o ( 4 ) ( 7 )de t e r mi n e t h e mi n i mu m d i s t a n c e d 一 d the n t h e d i a me t e r of t h e f i ni s hi n g c ut t e r d 一 1 mi n p o c k ， i s lia n ， d l i s o b t a i n e d 1 2 2 fuz z y i de n t i f i c a t i o n o f s y m me t r y a nd r o t a t i o n de f i ni t i on 1 i s t h e s ymme t r i c a l a n d r ot a t i on a l e r r or of f e a t u r e e l e me n t s i n t h e c ut r e gi o n 一 ma x 6 ( 1 ) wh e r e a，b a r e t he s i d e l e ng t hs o f p o c k e t o r c o n t ou r b or d e r de f i n i t i o n 2 e i s t h e e r r o r b e t we e n t he c e n t e r c o f o n e f e a t ur e e l e me nt a nd t h e gi v e n s y m me t r i c a l a n d r o t a t i o na l c e nt e r e ll c 一 c de f i n i t i o n 3 i s t h e f u z z v s e t o f t h e f e a t ur e e l e me n t s j g e n e r a t e d by t h e i nt e r s e c t i o n a r e a of a c u t r e g i o n a nd on e h o r i z on t a l p l a n e ( e g i s l a nd l o o p o r b o s s l o o p， h o l e l o o p，j 一1 ， ， )b e l o n g i n g t o t he s y mm e t r i c a l a n d r o t a t i o na l c e nt e r of t h e g i v e n c e n t e r ，d e n o t e d a s j ( j ) i s t h e me m b e r s h i p f u nc t i o n 一 e a el e me nt s i n t h e f u z z y s e t a r e c o m p o s e d of d i f f e r e n t f e a t ur e e l e me nt s of a l l l e v e l s。a n d i f t h e me m b e r s h i p d e g r e e of f e a t u r e e l e m e nt s d o e s n o t e xi s t i n e v e r y l e v e l ，i t i s 1 de f i n i t i o n 4 百 i s t h e f u z z y s e t o f t h e r e g i o n f e a t ur e z b el on gi n g t o s y m me t r i c a l a n d r ot a t i on a l p a r t s ，b v( a1 aa2 a aa ) ( z ) 一 v( ( ， ) a ( ， ) a a ( ) ) th e i de n t i f i c a t i o n m e t h o d o f ge n e r a l m a c hi n i ng f e a t ur e s i n t h e c ut r e g i o n i s a s f o l l o ws： st e p 1 ca l l i n t he mod e l of t he p a r t a n d i n pu t t h e i n f o r m a t i o n o f t he n o n ma c h i ni n g f e a 维普资讯 no 2 s u n qu a n p i n ge t a 1 ma c h i n i n g fe a t u r e b a s e d 3 - ax i s au t o ma t i c nc p r o g r a mmi n g 1 5 3 s t e p 2 ext r a c t t he f e a t ur e s o f t he c ut r e g i on a n d i d e n t i f y t h e c u t r e g i o n ( p o c k e t o r c o n t o u r ) s t e p 3 di s t i n gu i s h t he f e a t ur e e l e me nt s wh e t h e r i t i s a r o t a t i on a l p a r t o r n ot ( z )一 1 o 5 a ( ) ro t a t i o n a l p a r t ( z )一 1 o 5 a ( ) no n r o t a t i o n a l p a r t s t e p 4 j u d g e 4( x) u ( i s t h e t h r e s h o l d v a l ue) i f i t i s ，no” ，t hi s c u t r e gi on do e s n o t ha v e s y mme t r y， t ur n t o “ e n d i f i t i s “ ye s ， ud ge ( z) ( z)?i f i t i s no ” ，t h i s c u t r e g i o n h a s s y mme t r y，e n d t h e d i s c r i m i na t i oni f i t i s “y e s ” ， t h i s c ut r e gi on h a s r ot at i o na i f e a t ur e s af t e r c a l c u l a t i ng t h e f u z z y de gr e e f o r ma c hi n i ng f e a t ur e s i n t h e c u t r e g i on， t he t yp e o f g e n e r a l ma c hi ni n g- f e a t u r e i n t he c ut r e gi o n i s de - t e r mi ne d m o r e o ve r， t h e t o ol p a t h pl a n f o r r o ug hi n g a n d f i n i s hi ng i s s e l e c t e d i f t he i d e n t i f i e d mac hi ni n g - f e a t ur e i s p o c ke t wi t h n o i s l an d，a n d t he po c ke t bo t t o m i s p l a ne，t he c y c l o i d t o o l p a t h s t y l e i s f i r s t l y s e l e c t e d ( s e e f i g 4 ) i f t h e i d e nt i f i e d m a c hi n i n g f e a t ur e i s p o c ke t wi t ho ut i s l a n d，a nd t he p o c ke t bo t t o m i s c u r v e f a c e，t he t o o l p a t h s t yl e o f a r c c o nne c t i on i s f i r s t l y s e l e c t e d ( s e e fi g 5 ) i f t h e i d e n t i f i e d ma c h i n i n g f e a t u r e i s po c k e t wi t h i s l a nd s， t he l oo p t oo l pa t h s t y l e i s f i r s t l y s e l e c t e d ( s e e f i g 6 ) i f t h e i d e n t i f i e d ma c hi ni n g f e a t u r e i s c o nt o ur wi t h no c o nv e x， a nd c o nt ou r i s r ot a t i o n ai ，t h e s pi r a i t o ol p a t h s t y l e i s f i r s t l y s e l e c t e d ( s e e f i g 7 ) i f t h e i d e n t i f i e d ma c hi n i n g f e a t u r e i s c o nt our wi t h c on v e xe s， a nd c on t o u r i s no n r o t a t i on a l ，t he t o o l pa t h s t yl e o f l i n e a r c c o n n e c t i o n i s f i r s t l y s e l e c t e d ( s e e fi g 8 ) the s e t oo l p a t h s t yl e s ha v i n g t he a d v a nt a g e of s mo ot hne s s a r e s ui t a bl e f o r hsm fi g4 cy c l oi d t o ol p at h s t y l e fi g5 too l p at h s t yl e of a r c c on ne c t i on 2 fi g6 lo op t o ol pa t h s t y l e fi g 7 spi r a l t o ol pa t h s t yl e fi g 8 to ol pa t h s t yl e of l i n e a r c c on ne c t i on opti m i zati on m odel for process i ng plan 0f hsm opt i m i z a t i on o f t he pr o c e s s i ng pl a n o f hsm i nv o l v e s man y q ue s t i on s，s u c h a s wor kp i e c e f e a t u r e s ，c u t t e r ，ma c h i n e t o o l a n d t h e t y p e o f t o o l pa t h，e t c i n o r d e r t o f i n d t he o pt i m u m c o mbi n a t i o n o f r e s o u r c e s un d e r t he s h or t t i me， l o w c os t a n d h i g h q u a l i t y 。 a s y n t h e t i c a s s e s s i n g mo d e l i s pr e s e n t e d a s f o l l o ws： s t e p 1 ob j e c t i v e f u n c t i o n m a c hi n i ng t i m e 丁 ： n d l ( 2 ) whe r e d i s t he e f f e c t i v e d i a me t e r； t he c u t t i n g s p e e d；l t he t ot a l l e n gt h of t o ol p at h； z t h e f e e d p e r t oo t h；d t he t ot a l de p t h o f c u t；口 t h e a xi al d e pt h o f c u t：a n d 2 t h e n umbe r of t he t o o t h cut t e r l i f e t c c 。 df 。 a p r a ( 3) whe r e c i s t he c o e f f i c i e nt o f c ut t e r l i f e； ct o t he c o e f f i c i e nt o f o pt i m i z e d c ut t i ng pa t h( 1 0 1 3)； a n d t he r a d i a l d e p t h of c ut m a c hi n i ng c os t 维普资讯 1 5 4 tr a n s a c t i o n s o f na n j i n g un i v e r s i t y o f ae r o n a u t i c s as t r o n a u t i c s vo l _ 2 4 一 ( + ) + 1 whe r e f i s t he c o s t of ma c hi n e t o ol a n d o pe r a t or ； ft t he s i ng l e c ut t e r c os t；t t h e c u t t e r e xc h a ng e t i me；a nd t t h e t o t a l c ut t i ng t i me st e p 2 co mpr e he ns i v e a s s e s s i ng mo d el f or p r oc e s s i n g pl a n e 一 叫 + 叫 g c+ 叫 gq ( 5) whe r e w ，w a n d wq a r e t he we i g ht c oe f f i c i e nt s， t he s u m of t h e m i s 1 k f ，k a n d k。a r e t h e b a l a nc e c o e f f i c i e nt s， whi c h t a k e t h e t r a d i t i o n a1 nc ma c hi n i ng t i me，c os t a n d qu a l i t y a s r e f e r e n c e i n t hi s p a pe r th e y ma y b e de c i d e d i n an o t he r wa y qf i s t h e s u r f a c e q u a l i t y， e x p r e s s e d i n s u r f a c e r ou g hne s s for ba l l e n d mi l l i n g，i t a p pr o xi ma t e l y e q u al s r 一 。 。 。 。 。 。 。 。 。 。 。一 c i r 一 r 一 ( n 2 c o s a ) 1 + c ( 6 ) whe r e c i s a r i t hm e t i c a v e r a g e de vi a t i o n c o e f f i c i e n t，whi c h i s a b ou t 3 0 0；o t t he a c ut e an gl e b e t we e n t h e l i n e o f t wo a d j a c e n t c u t t e r c o n t a c t p oi n t s a nd t he h o r i z o nt a l pl a n e；an d c t he mi ni mum a r i t hme t i c d e v i a t i on，wh i c h i s a bo u t 0 2 “ m a n d i t i s r e l a t e d t o t h e c ut t e r e dg e t yp e，pl a s t i c d e f o r ma t i o n i n m a c hi n i n g s ur f a c e， a n d vi b r a t i o n o f ma c h i ne t o o 1 。e t c s t e p 3 ob j e c t i v e o p t i mi z a t i o n the mat e r i a 1 r e mo va 1 r a t e ( m rr)i s t h e o b j e c t i v e i n r o u g h i n g i f t h e p r i c e o f ma c h i n i n g p a r t i s ve r y hi g h，t he c ut t i n g p a r a me t e r s of l a r ge f e e d r a t e a n d l a r g e de pt h of c ut a r e us e d wf ，w a nd 砌。a r e t a ke n a s 0 6，0 4 a n d 0 se mi f i ni s hi n g i s t he t r a ns i t i o na l p r oc e s s i n g b e t we e n r o u g h i n g a n d f i n i s h i n g，i t s c h i e f j o b i s t o i mpr o v e t he s ur f a c e qu a l i t y wf ，w a n d w。a r e t a ke n a s 0 3，0 2 5 a n d 0 4 5 hi g h s u r f a c e q u a l i t y i s t h e o b j e c t i v e i n f i n i s h i ng i n g en e r a l ， t h e de ns e t o ol p a t h i s pl a n n e d a n d t he c u t t i n g t i m e i s r e l a t i v e l y l on g i n f i ni s h i ng i t c o mm o nl y t a k e s s e v e r a l h ou r s ev e n g r e a t e r t ha n t e n ho u r s t o ma c hi n e t he l a r ge pa r t s t ha