Kodi Mungatsimikizire Bwanji Kulondola kwa Maloboti a Servo a Five-Axis?

Kodi Mungatsimikizire Bwanji Kulondola kwa Maloboti a Servo a Five-Axis? Kuyambira pa Ukadaulo Wapakati Mpaka pa Kukhazikitsa

Pakupanga zinthu molondola, kupanga zinthu zamagetsi, kukonza zida zachipatala, ndi zina, kulondola kwa maloboti a servo okhala ndi ma axis asanu kumatsimikizira mwachindunji ubwino wa chinthu ndi momwe chimagwirira ntchito. Poyerekeza ndi atatu-Maloboti Ozungulira,machitidwe a axis asanu, yokhala ndi ma axe awiri owonjezera ozungulira (nthawi zambiri ma axes a A, C, kapena B), imatha kukwaniritsa kuyenda kovuta kwambiri, koma izi zimapangitsanso kufunika kwakukulu pakuwongolera molondola - ngakhale cholakwika cha 0.01mm chingayambitse kuyimitsidwa kwa zinyalala ndi mzere wopanga. Nkhaniyi isanthula njira zazikulu zotsimikizira kulondola kwa ma robot a servo a axis asanu kuchokera pazinthu zisanu zazikulu: kapangidwe ka makina, dongosolo la servo, algorithm yowongolera, kukhazikitsa ndi kuyambitsa, komanso kukonza nthawi zonse, kupereka chitsogozo chothandiza pakusankha ndi kugwira ntchito kwa bizinesi.

Choyamba. Kapangidwe ka Makina: "Maziko Oyenera" a Kulondola: Kulamulira Zolakwika kuchokera ku Gwero la Kapangidwe

Kulondola kwa loboti ya servo ya axis zisanu kumadalira makamaka kukhazikika kwa kapangidwe kake ka makina. Kusintha kulikonse, kusewera, kapena kuwonongeka kwa zigawo zake kudzasintha mwachindunji kukhala zolakwika zoyenda. Yang'anani kwambiri zigawo zitatu zazikulu izi:

1. Zigawo Zapakati Zotumizira Mauthenga: Kusankha Mtundu Woyenera ndi Kuwongolera Molondola
Dongosolo lotumizira mauthenga ndi lofunika kwambiri pakutumiza mphamvu komanso kuchita zinthu molondola. Njira zotumizira mauthenga zimaphatikizapo zomangira za mpira, zochepetsera mphamvu, ndi zochepetsera mphamvu za planetary. Izi ziyenera kufananizidwa kutengera zomwe zimafunika pa katundu ndi kulondola:

Zomangira za mpira: Izi ndi zomwe zimapangitsa kuti ma axes olunjika ayende (monga ma axes a X/Y/Z). Kulondola kwawo kumakhudza mwachindunji cholakwika cha malo. Tikukulimbikitsani kusankha kulondola kwa C3 kapena kupitirira apo (cholakwika cha malo ≤ 0.008mm/300mm). Njira yoyika zinthu pasadakhale (monga double-nut preload) iyenera kugwiritsidwa ntchito kuti muchepetse kugwedezeka pakati pa screw ndi nati. Chitsulo cha alloy champhamvu kwambiri (monga SUJ2) chiyenera kukondedwa, ndipo cholimba (kuuma kwa pamwamba ≥ HRC58) chiyenera kuchepetsedwa kuti muchepetse kuwonongeka ndi kusokonekera mutagwiritsa ntchito nthawi yayitali.

Zochepetsera mphamvu ya Harmonic: Zomwe zimagwiritsidwa ntchito pozungulira ma axes (monga ma axes a A/C), zimapereka zabwino monga chiŵerengero chapamwamba cha kufalikira ndi kukula kochepa. Komabe, kusintha kwa elastic kwa flexspline kungayambitse zolakwika zobwerera. Sankhani chitsanzo cholondola kwambiri chokhala ndi cholakwika chobwerera cha ≤1 arc minute. Komanso, wongolerani liwiro lolowera (pewani kupitirira 80% ya liwiro lovomerezeka) kuti muchepetse kuwonongeka kwa kutopa kwa flexspline. Zipangizo zina zapamwamba zimagwiritsa ntchito kuphatikiza kwa harmonic reducer ndi absolute encoder kuti zibwezeretse zolakwika za elastic deformation panthawi yeniyeni.

Ma Guide: Izi zimatsogolera kayendedwe ka loboti ndipo ziyenera kukhala zofanana ndi zida zotumizira. Ma Linear roller guides amalimbikitsidwa (amapereka mphamvu yonyamula katundu komanso kulimba kuposa ma ball guides). Mukakhazikitsa, linganizani ma guider rail parallelism pogwiritsa ntchito laser interferometer (mpaka kulakwitsa kwa ≤0.005mm/m2) kuti mupewe "kugwedezeka" kapena kusakhazikika komwe kumachitika chifukwa cha guider rail lingement.

2. Chimango: Kulinganiza pakati pa kulimba ndi kupepuka

Kusakwanira kulimba kwa chimango kungayambitse "kugwedezeka" panthawi yoyenda, makamaka pa liwiro lalikulu kapena pansi pa katundu wolemera, komwe zolakwika zimakulitsidwa. Zoganizira za kapangidwe:

Kusankha zinthu: Ma aluminiyamu amphamvu kwambiri (monga 6061-T6) angagwiritsidwe ntchito pa manipulators ang'onoang'ono ndi apakatikati, kulinganiza kupepuka ndi kulimba. Pa ntchito zolemera (zolemera > 50kg), chitsulo chopangidwa (monga HT300) kapena zitsulo zolumikizidwa zimalimbikitsidwa. Chithandizo cha ukalamba chingagwiritsidwe ntchito kuthetsa kupsinjika kwamkati ndikuchepetsa kusinthika mutagwiritsa ntchito nthawi yayitali.

Kukonza kapangidwe kake: Gwiritsani ntchito kapangidwe ka "triangular support" kapena "box-type" kuti muwonjezere kulimba kwa chimango. Onjezani nthiti zolimbitsa kumadera onyamula katundu (monga ma axis connections ozungulira) kuti mupewe kupsinjika komwe kulipo. Mwachitsanzo, chowongolera cha ma axis asanu kuchokera kwa wopanga zida zamagalimoto chinachepetsa cholakwika cha dynamic motion ndi 40% powonjezera kulimba kwa chimango kuchokera pa 150 N·m/° mpaka 280 N·m/°.

3. Chothandizira kumapeto: Sinthani kuti chigwirizane ndi katunduyo ndikuchepetsa "kutsika kwa kumapeto"

Kulemera ndi kulondola kwa kuyika kwa chogwirira ntchito kumapeto (monga chogwirira kapena chikho chokokera) zidzakhudza "kulondola kwa malo ogwirira ntchito kumapeto" kwa chogwirira ntchito. Mfundo ya "kufananiza katundu" iyenera kutsatiridwa:

Katundu womaliza sayenera kupitirira 80% ya katundu woyesedwa ndi loboti (kuti apewe kusintha kwa shaft komwe kumachitika chifukwa cha kuchuluka kwa zinthu);

Kulumikizana pakati pa actuator ndi flange ya robot kuyenera kutetezedwa pogwiritsa ntchito zikhomo za dowel ndi mabolt amphamvu kwambiri. Cholakwika cha flatness pamwamba pa flange chiyenera kukhala ≤ 0.003mm, ndipo cholakwika cha coaxiality chiyenera kukhala ≤ 0.005mm kuti tipewe kusagwirizana kwa mapeto chifukwa cha kusagwirizana kwa kulumikizana.

Chachiwiri. Dongosolo la Servo: "Power Core" ya Precision, Kuchepetsa Kupotoka pa Mlingo Wolamulira

Kulondola kwa kayendedwe ka loboti ya servo yokhala ndi ma axis asanu kwenikweni ndi "kuthekera kwa dongosolo la servo kutsatira malamulo"—pambuyo poti lamulo latumizidwa, injini ya servo, dalaivala, ndi encoder ziyenera kugwirira ntchito limodzi kuti zichepetse zolakwika. Zinthu zitatu zotsatirazi zimafuna kukonza kwakukulu:

1. Servo Motor: Sankhani Mtundu Woyenera + Sinthani Kusasinthika

Mota ya servo ndi "gwero lotulutsa mphamvu," ndipo kulondola kwake kumatsimikizira mwachindunji kusalala kwa mayendedwe ndi kulondola kwa malo.

Kusankha Mtundu: Ma mota a servo okhazikika a maginito ogwirizana ndi maginito ndi omwe amakonda kwambiri (amapereka liwiro loyankha mwachangu ndi 30% komanso torque ripple yocheperako ndi 20% kuposa ma mota a asynchronous). Izi ndizofunikira kwambiri makamaka pazochitika zoyambira mwachangu kwambiri (monga electronic component pickup), chifukwa amatha kuchepetsa zolakwika "zotayika" zomwe zimachitika chifukwa cha torque yosakwanira.

Kutsimikiza kwa Encoder: Encoder ndi "chinthu chofotokozera malo." Kutsimikiza kwakukulu, kuzindikira malo molondola. Ndikofunikira kugwiritsa ntchito 23-bit absolute encoder (kulondola kwa malo ≤ 0.001mm) pa ma axes olunjika ndi 17-bit absolute encoder (kulondola kwa angular ≤ 0.005°) pa ma axes ozungulira. Poyerekeza ndi ma encoder owonjezera, ma absolute encoder safuna "kulinganiza kwa nyumba," komwe kungalepheretse kusinthasintha kwa malo pambuyo pa kulephera kwa magetsi ndi kuyambiranso.

2. Dalaivala: Konzani njira yowongolera kuti muchepetse zolakwika zotsatirazi

Dalaivala wa servo ndi "malo owongolera mota," ndipo mtundu wa njira yake yoyendetsera zinthu umakhudza mwachindunji kuthekera kwake kobwezera zolakwika. Ntchito zazikulu zotsatirazi ziyenera kuyatsidwa:
Kukonza zokha kwa magawo a PID: Dalaivala amazindikira yokha kuchuluka kwa magalimoto ndi kusakhala ndi mphamvu, kukonza magawo ofanana (P), integral (I), ndi differential (D) kuti achepetse kugwedezeka kwambiri (monga, kugwedezeka panthawi yoyika). Mwachitsanzo, kasitomala mumakampani a 3C adachepetsa cholakwika cha X-axis chotsatira kuchokera pa 0.02mm mpaka 0.008mm kudzera mu kukonza zokha kwa dalaivala.
Kuwongolera kwa Feedforward: Izi zimaneneratu kusintha kwa katundu wa injini (monga, mphamvu ya inertial panthawi yofulumizitsa) pasadakhale ndipo zimatulutsa mphamvu ya torque kuti zipewe kusinthasintha kwa liwiro komwe kumachitika chifukwa cha kusinthasintha kwa katundu. Pa zochitika zolumikizana ndi ma axis asanu (monga, kukonza pamwamba), kuwongolera kwa feedforward kumatha kuchepetsa cholakwika cha contour ndi zoposa 30%.
Kuchepetsa kugwedezeka kwa maginito: Kuthana ndi kugwedezeka kwa makina panthawi ya kugwedezeka kwa maginito Roboti MPogwiritsa ntchito mphamvu ya ovement (monga kugwedezeka kwa chimango panthawi yoyenda mofulumira kwambiri), dalaivala amagwiritsa ntchito "kusefa kwa notch" kuti athetse kugwedezeka kwa ma frequency enaake, kuchepetsa kulondola komwe kumachitika chifukwa cha resonance.

3. Kulamulira Kogwirizana kwa Ma Axis Asanu: Kuthetsa "Cholakwika Cholumikizira Pakati pa Ma Axis"

Vuto lalikulu ndi ma manipulators a five-axis ndi kugwirizana kwa kuyenda kwa multi-axis. Pamene ma axes onse asanu akuyenda nthawi imodzi, liwiro ndi kuthamanga kwa axis iliyonse ziyenera kufananizidwa bwino, apo ayi "zolakwika za contour" (monga kusintha kwa mawonekedwe pamene mukupanga malo opindika) zidzachitika. Izi zimafuna kukonza kudzera mu ukadaulo wotsatira:

Ma algorithms a Kinematic forward ndi inverse: Gwiritsani ntchito chitsanzo cha kinematic chapamwamba kwambiri kuti muwerenge molondola magawo oyendera a axis iliyonse (monga kubwezera ngodya kwa ma axes ozungulira) kuti mupewe zolakwika zomwe zimachitika chifukwa cha kuyandikira kwa algorithmic. Mwachitsanzo, pa kasinthidwe ka "cradle-style" ka five-axis (A + C axes), algorithm iyenera kulipira kutayika pakati pa ma centers a rotary ndi linear axes.

Kukonza njira yolumikizirana: Gwiritsani ntchito "spline interpolation" kapena "NURBS interpolation" (m'malo mwa njira yolumikizirana yachikhalidwe) kuti mukwaniritse kuyenda bwino kwa mzere uliwonse ndikuchepetsa zolakwika zomwe zimachitika chifukwa cha kusintha kwadzidzidzi kwa liwiro. Wopanga zida zamankhwala adawongolera kulondola kwa makina opangira pamwamba pa malo olumikizirana kuchokera pa ± 0.03mm mpaka ± 0.015mm pokhazikitsa njira yolumikizirana ya NURBS.

Chachitatu. Kulipira Zolakwika: "Njira Yowongolera" Yolondola, Kugwiritsa Ntchito Ukadaulo Kuthetsa Zolakwika Zachibadwa

Ngakhale makina ndi servo zitakonzedwa bwino, zolakwika zomwe zimachitika (monga kulakwitsa kwa kutentha, kulakwitsa poika malo, ndi kulakwitsa kwa geometric) zidzakhalapobe, zomwe zimafuna njira zolipirira kuti zichepetse vutoli:

1. Kulipira Zolakwika za Kutentha: "Wopha Wosaoneka" wa Kusintha kwa Kutentha

Pamene loboti ya axis zisanu ikugwira ntchito, kukangana kumabweretsa kutentha mu injini, screw lead, ndi guide rail, zomwe zimapangitsa kuti zigawozo zitukuke komanso zisinthe. Mwachitsanzo, pa 1°C iliyonse yomwe kutentha kwa screw ya ball screw kumakwera, kutalika kumawonjezeka ndi pafupifupi 11μm/m, zomwe zimapangitsa kuti pakhale zolakwika zoyika mzere wa axis. Mayankho akuphatikizapo:

Zipangizo: Ikani masensa oyezera kutentha (monga PT1000) pafupi ndi mota ndi screw ya lead kuti muwone kusintha kwa kutentha nthawi yeniyeni.

Mapulogalamu: Pangani chitsanzo cha masamu cha "kulakwitsa kutentha" (monga chitsanzo chowongolera mzere) kuti chiwerengere ndikulipira zolakwika zokha kutengera deta ya sensa. Mwachitsanzo, wopanga zida zamakina adagwiritsa ntchito chiwongola dzanja cha kutentha kuti akhazikitse kulondola kwa ntchito kwa nthawi yayitali (kwa maola 8) kwa loboti ya axis zisanu kuyambira ±0.025mm mpaka ±0.012mm.

2. Kulipira Zolakwika Zoyikira: Kugwiritsa Ntchito Laser Interferometer "Kulinganiza Gawo Lililonse"

Cholakwika cha malo chikutanthauza kusiyana pakati pa malo enieni a loboti ndi malo olamulidwa. Iyenera kuyezedwa ndikulipidwa pogwiritsa ntchito zida zapadera:
Zida Zoyezera: Gwiritsani ntchito laser interferometer (monga Renishaw XL-80) kuti muyese zolakwika pa malo, zolakwika zobwerezabwereza, ndi kubwezera kumbuyo kwa mzere uliwonse.
Njira Yolipirira: Lowetsani deta yoyezera mu Robot Kodi Chiyani?dongosolo lowongolera, pangani "tebulo lothandizira zolakwika," ndikugwiritsa ntchito zowongolera nthawi yeniyeni panthawi yoyenda. Mwachitsanzo, pa wopanga zida za ndege, kuwerengera kwa laser interferometer kunachepetsa cholakwika cha malo a X-axis kuchokera pa 0.018mm mpaka 0.006mm.

3. Kulipira Zolakwika za Jiometri: Kuchotsa "Zolakwika Zachibadwa" mu Kapangidwe ka Kapangidwe

Zolakwika za geometric za robot ya five-axis zikuphatikizapo zolakwika za perpendicularity ya axis ndi zolakwika za rotational axis eccentricity, zomwe zimafuna kulipidwa kudzera m'njira zotsatirazi:

Kulinganiza Kuzungulira: Gwiritsani ntchito chizindikiro cha sikweya ndi choyimitsa kapena laser interferometer kuti muyese kupingasa pakati pa ma axes olunjika (monga, cholakwika cha kupingasa pakati pa ma axes a X ndi Y chiyenera kukhala ≤ 0.005 mm/m). Konzani cholakwikachi pogwiritsa ntchito ntchito ya "perpendicularity compensation" ya system yowongolera.

Kulipira kwa Rotational Axis Eccentricity Compensation: Gwiritsani ntchito ballbar kuti muyese kufalikira kwa axis yozungulira (monga, kufalikira pakati pa malo ozungulira a A-axis ndi Z-axis). Magawo a kubwezera kwa Eccentricity amaphatikizidwa mu kinematic model kuti apewe kupotoka kwa malo otsiriza komwe kumachitika chifukwa cha kufalikira.

Chachinayi. Kukhazikitsa ndi Kukhazikitsa: "Chinsinsi Chokhazikitsa" Kulondola; Tsatanetsatane Umatsimikizira Zotsatira Zomaliza

Ngakhale zida zokha zitakwaniritsa kulondola kofunikira, kuyika ndi kuyimitsa kosayenera kungayambitse kutayika kwa kulondola. Njira zotsatirazi ziyenera kutsatiridwa mosamala:

1. Malo Okhazikitsira: Onetsetsani kuti maziko ake ndi olimba komanso osalala

Zofunikira pa Maziko: Malo omwe loboti Choyikidwacho chiyenera kukhala cholimba ndi konkriti (mphamvu ≥ C30) ndi makulidwe ≥ 200mm kuti chisagwedezeke chifukwa cha kugwa kwa nthaka.

Kulinganiza Molunjika: Gwiritsani ntchito mulingo wolondola (wolondola wa 0.02mm/m) kuti mulinganize thupi la makina kuti muwone ngati ali molunjika. Cholakwika cholunjika cha mzere wolunjika chiyenera kukhala ≤ 0.01mm/m, ndipo kutha kwa mzere wozungulira kuyenera kukhala ≤ 0.005mm.

2. Kukonza Ma Axis System: Konzani pang'onopang'ono kuchokera ku single-axis kupita ku coordinated

Kukonza zolakwika pogwiritsa ntchito mzere umodzi: Choyamba yesani kulondola kwa mayendedwe (cholakwika cha malo ndi kubwerezabwereza) kwa mzere uliwonse payekhapayekha. Kulondola kwa mzere umodzi kukafika pa muyezo, pitirizani kukonza zolakwika pogwiritsa ntchito mzere umodzi.

Kukonza zolakwika mwadongosolo: Kudzera mu kuyesa kudula kapena kuyesa kutsatira njira (monga kusuntha loboti motsatira njira yokhazikika ndikugwiritsa ntchito laser tracker kuti muwone kupotoka kwa njira), konzani magawo olumikizirana a five-axis kuti muwonetsetse kuti kulondola kwa contour kukukwaniritsa muyezo.

3. Kuyesa Katundu: Yerekezerani Mikhalidwe Yeniyeni Yogwirira Ntchito Kuti Mutsimikizire Kukhazikika Kolondola

Chitani mayeso opitilira a katundu kwa maola 8-12 kutengera "katundu wapamwamba kwambiri" ndi "liwiro lalikulu" lomwe limagwiritsidwa ntchito popanga zinthu zenizeni.

Chitani macheke olondola nthawi zonse panthawi yoyesa (monga kuyeza cholakwika cha malo omalizira ndi chizindikiro choyimbira maola awiri aliwonse) kuti muwonetsetse kuti kulondola kumakhalabe mkati mwa malire ovomerezeka malinga ndi momwe katunduyo alili.

Chachisanu. Kukonza Tsiku ndi Tsiku: "Chitsimikizo Cha Nthawi Yaitali" Cha Kulondola: Kupewa Ndikwabwino Kuposa Kukonza

Kulondola kwa loboti ya servo ya axis zisanu kudzachepa pakapita nthawi, kotero nthawi yokonza nthawi zonse ndi yofunika:

1. Kukonza Chigawo cha Transmission: Kupaka Mafuta ndi Kuyeretsa Kuti Muchepetse Kuwonongeka

Sikuluu/Zingwe Zotsogolera: Pakani mafuta apadera (monga mafuta ochokera ku lithiamu) maola 50 aliwonse ogwirira ntchito kuti mupewe kuwonongeka chifukwa cha kukangana kouma. Tsukani fumbi la chivundikiro cha chivundikiro cha chivundikirocho mwezi uliwonse kuti fumbi lisalowe mu chivundikiro cha chivundikirocho.

Chotsitsa Mafuta Chogwirizana: Yang'anani mulingo wa mafuta ogwirizana maola 200 aliwonse ogwirira ntchito ndikuwonjezera mafuta apadera (monga mafuta ochepetsa mafuta ogwirizana) ngati pakufunika. Sinthani mafuta ogwirizana chaka chilichonse.

2. Kusamalira Servo System: Kuyang'anira Nthawi Zonse ndi Machenjezo Oyambirira

Chojambulira: Tsukani nyumba yojambulira kotala lililonse ndikuyang'ana maulumikizidwe a chingwe kuti mupewe kusokoneza kwa chizindikiro chifukwa cha zingwe zotayirira.

Kuyendetsa: Yang'anani fan yoziziritsira ya dalaivala mwezi uliwonse kuti muwone ngati ikugwira ntchito bwino komanso yeretsani fumbi kuchokera m'mabowo oziziritsira kuti mupewe kuwonongeka kwa magwiridwe antchito chifukwa cha kutentha kwambiri.

3. Kuyang'ananso Molondola: Kukonza Nthawi Zonse ndi Kukonza Panthawi Yake

Yang'ananinso kulondola kwa mzere uliwonse miyezi itatu iliyonse pogwiritsa ntchito laser interferometer kapena ballbar. Ngati cholakwika chapitirira malire (monga, cholakwika cha malo > 0.01mm), chibwezereninso mwachangu.

Chitani "kuwerengera kolondola kwathunthu" pachaka, kuphatikiza kuyang'anira kapangidwe ka makina, kukonza magawo a servo, ndikusintha zosintha zolakwika, kuti muwonetsetse kuti zidazo zikugwira ntchito molondola kwambiri kwa nthawi yayitali.

Kutsiliza: Kulondola kwa loboti ya servo ya axis zisanu ndi "pulojekiti ya machitidwe," osati sitepe imodzi.

Kuonetsetsa kuti loboti ya servo yokhala ndi ma axis asanu ndi yolondola kumafuna njira yonse yogwirira ntchito: "kupanga ndi kusankha - kupanga - kukhazikitsa ndi kuyitanitsa - kukonza nthawi zonse." Kapangidwe ka makina ndiye maziko, makina a servo ndiye maziko, kulipira zolakwika ndiye njira, ndipo kukhazikitsa ndi kukonza ndiye chitetezo. Kwa mabizinesi, kuwonjezera pa kusankha zida zolondola kwambiri, ndikofunikira kukhala ndi "chidziwitso chowongolera molondola" - kudzera mu kusanthula nthawi zonse, kuyang'anira deta, komanso kukonza kosalekeza - kuti muwonetsetse kuti kulondola kwa lobotiyo kumakwaniritsa zofunikira pakupanga nthawi zonse.

Ngati mukukumana ndi mavuto enaake okhudza kuwongolera molondola kwa loboti ya servo ya axis zisanu (monga kulakwitsa kwakukulu mu mzere umodzi kapena kusakwanira kulondola kwa contour panthawi yolumikizirana), kusanthula kwina kutengera momwe zinthu zilili kungagwiritsidwe ntchito popanga njira zothetsera mavuto, zomwe zingathandize kuti zidazo zikwaniritse kufunika kwake "kopanga molondola".