Ukuhlaziywa kwe-Wavelet Of Overcut In Free-Form Surfaces CNC Machining
Inani elikhulu lemishini efana namathuluzi womshini we-CNC nezikhungo zemishini zisetshenziselwa ukukhiqizwa kwesikhunta. Umjikelezo wokukhiqiza mude. Opharetha bathambekele ekukhathaleni. Uma ukwehluleka kwenzeka, kuvame ukuthatha imizuzwana embalwa ukusuka ekuboneni komuntu ukuthatha izinyathelo ezihambisanayo, ezingaholela ekulahlekelweni komkhiqizo, Okudala ukulahleka okukhulu kwezomnotho. Kunemibiko eminingi yocwaningo lwasekhaya nakwamanye amazwe mayelana nokuqhekeka kwamathuluzi nemishini yokuxilongwa kwamaphutha ezingxenyeni ezijwayelekile zokucubungula. Iningi lazo ligxile ekushisweni kwe-acoustic, amandla okusika noma ukuqapha ukudlidliza, njll., Futhi inqubekelaphambili enkulu yenziwe. Noma kunjalo, ukucubungula kuyinkimbinkimbi. Isikhunta nokunye okwenziwayo okunesici sefomu lamahhala kusenabo ubuchwepheshe bokuqapha obusebenzayo. Isizathu ukuthi isignali esikwe ngokweqile kunzima ukusibona. Okunye ukuhlinzeka ngezindlela ezisebenzayo zokuqapha kwesikhathi sangempela. Lo mbhalo usebenzisa amathuluzi wokucubungula amasiginali wamanje-ukuhlaziywa kwe-wavelet. Ukuskena "Okugxile" kwenziwa ngezikhathi ezahlukahlukene zamabhendi wesiginali yoqobo ukukhipha ngokunembile isignali esikwe ngokweqile esikhaleni semvamisa yesikhathi. 1 Umqondo wokuhlaziywa kwe-Wavelet Ukuhlaziywa kwe-Wavelet ukuthuthukiswa kokuhlaziywa kwe-Fourier. Isebenzisa i-Xu Shuxin et al. Ukulawulwa kwamanani we-Free-form surface kwe-Wavelet ukuhlaziywa kokusika ngokweqile ekusebenzeni I-elastic wavelet base function kb (t) isetshenziswa njengomsebenzi wokuguqula ohlanganisiwe. Ezimweni ezahlukahlukene ezahlukahlukene, iwindi lesikhathi liguqulwa ngokuzenzakalela lapho izici zemvamisa ephezulu zihlaziywa futhi zitholwe ngokuya ngokwanda nokuncipha kwepharamitha yesikali a (a incishisiwe) Lapho uhlaziya futhi uthola izici ezinemvamisa ephansi (ukwanda), iwindi livulwa ngokuzenzekelayo, futhi iwindi lemvamisa lincishiswa ngokuzenzakalela, elibona ushintsho oluguqukayo lwewindi lokuvama kwesikhathi ngezikhathi ezahlukahlukene. Umsebenzi wesisekelo ungashintshwa. Slayida eceleni kwe-eksisi yesikhathi, ukuze ukwazi ukuhlaziya noma imiphi imininingwane yesiginali nganoma yisiphi isikhathi.
2 Isimiso sokuhlaziya se-Wavelet sesiginali eyeqile ekusetshenzisweni kwendlela yefomu yamahhala. Ku-CNC machining, impambanweni yethuluzi lokuphela kobuso kanye nobuso bento yokusebenza ibizwa ngokuthi ukusika ngokweqile. Kungokwesika okungavamile. Lapho indawo yefomu yamahhala yento yokusebenza ingaphezu kwamandla, amandla okusika aguquka ngokuzumayo, aholele ekushintsheni kwamandla okusika, namandla wamanje oshayela ithuluzi nawo azoshintsha ngokufanele. Ngakho-ke, ukuqapha ushintsho lwamandla wamandla ngamandla okusika kungaqapha ngokungaqondile isimo sethuluzi futhi kukhishwe isignali yamanje kumoto othini lokuphotha. Indlela elula ukwenza i / ukumelana kochungechunge. U ukuguqulwa, okukhipha ngendlela yamandla kagesi, kepha ukwengezwa kokumelana kushintsha izici zomthwalo wemoto uqobo, okunciphisa ukunemba kwesilinganiso. Ngaphezu kwalokho, ezinye izinsimbi ezixhunywe emikhawulweni yomibili yesiphikisi kufanele ziguqulwe ngokulinganayo ukumisa amandla azo, okungabaza ngokungangabazeki ukukhulisa ubunzima besistimu yokukala. Ngenxa yalokhu, leli phepha lisebenzisa i-magnetic balance Hall Hall sensor. Inzwa uqobo ixhunywe ekunikezelweni kwamandla kagesi kweDC. Inkambu kazibuthe ikhiqizwa ngaphakathi kwento yeHholo. Lapho ukuphela kokufaka kwamanje kwemoto kuxhunywe kunzwa, okwamanje kwenziwa endaweni yokuphuma kwayo. Ikhiqiza amandla kazibuthe alinganiselayo ngaphakathi kwento yeHholo. Uma ushintsho lwamanje lwemoto, inkambu kazibuthe elinganiselayo izothinteka. Ukuze kuzuzwe ibhalansi entsha, okukhiphayo manje kufanele kuguqulwe ngokufanele. Ngoba into yeHholo inobudlelwano obuhle bomugqa phakathi kokufaka nokukhiphayo, ukuguquguquka kwesiginali yokukhipha kungakhombisa ngokungaqondile ushintsho lwamanje lwemoto. Setha isignali yokukhipha Is f (t), bese ukuguqulwa okuqhubekayo kwe-wavelet f (t) kungachazwa njengokulinganiswa kokuxazululwa okuningi komkhiqizo wangaphakathi we-f (t) no,) (, umsebenzi ohambelana nesikali 1, ngakho-ke umsebenzi wesisekelo se-V / space kufanele ubekwe Esikhaleni se-V / + i, isisekelo se-canonical orthogonal yesikhala se-V / + i ngakho-ke singasetshenziswa ukuveza ukulinganiselwa kuka-1 no-2'ngokulandelana kokuqagela kwe-V. / + mina noV /. Ngokwe-theorem yokuqagela, isixazululo Isibonakaliso semininingwane se-2's kufanele kube ukuqagela kwe-orthogonal yesiginali yoqobo esikhaleni se-orthogonal sokuhambisana se-V / cishe V + 1. Vumela lesi sikhala se-orthogonal esihambisanayo sibe yi-W /, okungukuthi, umsebenzi oyisisekelo we-W / space 2 / (x -2 / n) kufanele futhi ubekwe esikhaleni se-V / + i, ngakho-ke ifomula yesisekelo se-canonical orthogonal (5) ku isikhala se-V + 1 singasetshenziswa futhi ukuveza isignali / (t) GV + 1, bese ifomula engenhla ikhombisa ukuthi f (Ukulinganisela okuhlukile kwe-Af of t) kungatholwa kusilinganiso esilinganiselwe esilinganiselwe se-Ad + i / dlulisa isihlungi. Isiginali yemininingwane engu-D / f ka-f (t) nayo ingatholakala ku-Ad + i / ukudlulisa esinye isihlungi esisezingeni eliphakeme. Isihlungi h (n) g (n) sichazwa ngomkhiqizo wangaphakathi womsebenzi wokukala h (t) nomsebenzi we-wavelet ⑴.
Kwisiginali yedijithali esampulwe yikhompyutha, isignali ye-dyadic incipha ngokweqile. Amathuluzi wokusebenzela weThuluzi 2 athanda ukwenzeka. Ukuze wenze lula inqubo yokuhlola ngenkathi kucatshangelwa izici eziyisisekelo zokweqa ngokweqile, le ndatshana yenze isivivinyo sokulingisa ngokweqile njengoba kukhonjisiwe. Imvamisa yesampula ingu-1kHz.3.1 Izimo zokuhlolwa kwesivivinyo eseqisayo zimi kanje: Ububanzi bensimbi yokugaya ngu-8mm, Ukujula kokusika kungu-1mm, isivinini sokuphotha ngu-n = 500r / min, isivinini sokuphakelayo yi-v = 150mm / min, ukujula okudlulele kungu-Hg = 0.05mm, impahla yokusebenza ingu-A3 steel, futhi okokusebenza kwethuluzi kuyinsimbi enejubane elikhulu. Isiginali elinganisiwe ikhonjisiwe ku-S kusiginali esikwe ngaphezulu nokubola kwe-wave. Kungabonakala ukuthi isignali yesikhathi sesikhathi iyinkimbinkimbi ngokwengeziwe, futhi asikho isici esisobala esinqunyiwe. Isibonelo, lapho kugcinwa kusizinda semvamisa, ukuqapha kwesikhathi sangempela akukwazi ukufinyelelwa ngenxa yokuntuleka kokuma kusizinda sesikhathi. umgomo we. Ngakho-ke, isinali lokuqala elinganisiwe libhekene nokubola kwe-wavelet, futhi imiphumela yenguquko ibalwe emiphumeleni yenguquko. Kungabonakala emiphumeleni yenguquko ukuthi lapho kwenzeka ngokweqile, ukubonakala esikalini esincane (imvamisa ephezulu) akucaci, kepha isici se-overcut siyabonakala esikalini sesine. Kukhombisa ukuthi ekuqapheni kwangempela, umkhawulo ungasethwa kulesi sikali ukukhomba isimo sokusika, futhi iphuzu lalo elihlukaniswe kahle litholakala ngokunembile kuzikhombisi-ndlela zesikhathi semvamisa ku-wavelet transform graph, evumelana nokuqapha kwesikhathi sangempela . 3.2 Isivivinyo esiphambanweni Izimo ezimbili zokuhlolwa: ububanzi be-milling cutter ngu-10mm, ukusika ukujula = 0.5mm, isivinini sokuphotha n = 500r / iminithi, isivinini sokuphakela v = 150mm / min, ukujula ngokweqile kwe-Q1mm, into yokusebenza ngophawu lwamagagasi, into yethuluzi insimbi enejubane elikhulu Isignali elinganisiwe nokubola kwayo kwe-wavelet kungabonakala esithombeni. Kungabonakala kumuntu ukuthi iphuzu lokusika ngokweqile alibonakali ebangeni lemvamisa ephezulu. Futhi esikalini sesine, isici sokusika ngokweqile siboniswa ngokusobala. 4 Isiphetho I-Wavelet iguquka ibe ukwenziwa kwendawo kwemvamisa yesikhathi yesignali Inikeza isisekelo sezibalo, yamukela indlela yokuhlaziya amagagasi, ingahlaziya isignali kusuka esizindeni sesikhathi nobubanzi besizinda ngasikhathi sinye, futhi yenze ukubekeka okuqondile kwesikhathi semvamisa yamaphuzu ezithakazelisayo. Kumashini we-NC wefomu lamahhala lomsebenzi, ukweqa ngokweqile kuyindlela ejwayelekile yokwehluleka. Iphoyinti lokungena liqukethe imininingwane yemvamisa ecebile, kepha kunzima ukuthola imininingwane efanelekile mayelana nokuchofoza ngokweqile kusuka ekubhekweni kwesizinda kwesikhathi. Ukuhlaziywa kwe-Wavelet kungagcina isignali ngezikhathi ezahlukahlukene nasezigabeni, futhi ingakhipha ngokunembile imininingwane ehlukahlukene mayelana nephuzu lokuguqula imvamisa. Kukhombisa ukuthi ngesikhathi, isikhala sisebenzisa ukuskena "okugxile" ukugcina imininingwane eyeqile. Yize ukubonakaliswa kungabonakali kumabhendi athile emvamisa, kwamanye amabhendi wemvamisa, inani le-coefficient wavelet ngokusobala livelele, elingakhomba ngempumelelo isimo sokusika sethuluzi ngesikhathi sangempela.
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By Umkhiqizi weMinghe Die Casting | Izigaba: Izindatshana Eziwusizo |Material Omaka: I-Aluminium Casting, Zinc Ukulingisa, Ukulingiswa kweMagnesium, I-Titanium Casting, Insimbi Engagqwali, Brass Ekubunjweni,Ukulingiswa kweBronze,Isakaza ividiyo,Umlando wenkampani,I-Aluminium Die Casting | Amazwana Off