Kumenya neza neza CMM

ByinshiImashini za Cmm (guhuza imashini zipima) byakozwe naibice bya granite.

Imashini Ipima Imashini (CMM) ni igikoresho cyo gupima cyoroshye kandi cyateje imbere uruhare runini hamwe n’ibikorwa by’inganda, harimo no gukoresha muri laboratoire gakondo, ndetse n’uruhare ruheruka rwo gushyigikira umusaruro ku ruganda rukora ahantu habi.Imyitwarire yubushyuhe bwa CMM encoder umunzani ihinduka ikintu cyingenzi hagati yinshingano zayo.

Mu kiganiro giherutse gusohoka, cyanditswe na Renishaw, haraganiriweho ingingo yo kureremba no kumenya neza kodegisi ya kodegisi.

Umunzani wa Encoder urashobora kuba muburyo bwigenga muburyo butandukanye bwo kwishyiriraho (kureremba) cyangwa kubushuhe bushingiye kuri substrate (ubuhanga).Igipimo kireremba cyaguka kandi kigasezerana ukurikije ubushyuhe bwubushyuhe bwibikoresho byapimwe, mugihe igipimo cyizewe cyaguka kandi kigasezerana ku kigero kimwe nubutaka bwibanze.Ibipimo byo gupima ibipimo bitanga inyungu zinyuranye kubikorwa bitandukanye byo gupima: ingingo ya Renishaw irerekana ikibazo aho igipimo cyizewe gishobora guhitamo igisubizo kumashini za laboratoire.

CMMs ikoreshwa mugutwara amakuru yibipimo bitatu-bipima kubisobanuro bihanitse, bikozwe mumashini, nka moteri ya moteri na moteri yindege, murwego rwo kugenzura ubuziranenge.Hariho ubwoko bune bwibanze bwimashini yo gupima: ikiraro, cantilever, gantry hamwe nintoki.Ikiraro cyubwoko bwa CMM nibisanzwe.Mu gishushanyo cya kiraro cya CMM, ikariso ya Z-axis yashyizwe kuri gare igenda ku kiraro.Ikiraro kiyobowe ninzira ebyiri ziyobora-inzira ya Y-axis.Moteri itwara urutugu rumwe rwikiraro, mugihe urutugu rutandukanye rusanzwe rudasanzwe: imiterere yikiraro isanzwe iyobowe / ishyigikiwe na aerostatike.Imodoka (X-axis) na quill (Z-axis) irashobora gutwarwa n'umukandara, umugozi cyangwa moteri y'umurongo.CMM yashizweho kugirango igabanye amakosa adasubirwamo kuko aya arigoye kwishyura mugenzuzi.

CMMs ikora cyane igizwe nigitanda kinini cya granite yuburiri hamwe nuburinganire bukomeye bwa gantry / ikiraro, hamwe na quill ya inertia yo hasi ifatanye na sensor yo gupima ibikorwa-bice.Amakuru yatanzwe yakoreshejwe kugirango yizere ko ibice byujuje kwihanganira byateganijwe.Kodegisi ihanitse cyane yashyizwe kumurongo X, Y na Z zitandukanye zishobora kuba metero nyinshi kubimashini nini.

Ikiraro gisanzwe cya granite yo mu bwoko bwa CMM yakoreraga mucyumba gikonjesha, hamwe n'ubushyuhe bwo hagati ya 20 ± 2 ° C, aho ubushyuhe bwicyumba bwikubye inshuro eshatu buri saha, butuma granite yubushyuhe bwo hejuru ikomeza ubushyuhe buri gihe. 20 ° C.Kodegisi ireremba idafite ibyuma byashyizwe kuri buri cyuma cya CMM cyaba cyigenga cyane cyane kuri granite substrate kandi igasubiza byihuse impinduka zubushyuhe bwikirere bitewe nubushyuhe bwinshi bwumuriro hamwe nubushyuhe buke, ibyo bikaba biri munsi yubushyuhe bwubushyuhe bwameza ya granite .Ibi biganisha ku kwaguka kwinshi cyangwa kugabanuka k'ubunini hejuru ya 3m isanzwe ya 60 µm.Uku kwaguka gushobora kubyara ikosa rikomeye ryo gupima bigoye kwishyura bitewe nuburyo butandukanye.

Igipimo cyimyitozo ngororamubiri nicyo cyatoranijwe muri iki kibazo: igipimo cyizewe cyaguka gusa hamwe na coefficente yo kwagura ubushyuhe (CTE) ya granite substrate bityo rero, ikagaragaza impinduka nke mugusubiza ihungabana rito mubushyuhe bwikirere.Ihinduka rirerire ryubushyuhe rigomba gukomeza gutekerezwa kandi ibyo bizagira ingaruka ku bushyuhe buringaniye bwubushyuhe bwo hejuru cyane.Indishyi z'ubushyuhe ziroroshye kuko umugenzuzi akeneye gusa kwishyura indishyi zumuriro wa mashini utitaye no kuri encoder igipimo cyimyitwarire yubushyuhe.

Muncamake, sisitemu ya kodekeri ifite umunzani wateguwe ni igisubizo cyiza kuri CMMs zisobanutse neza hamwe na CTE / hejuru ya misa yubushyuhe bukabije hamwe nibindi bikorwa bisaba urwego rwo hejuru rwimikorere ya metero.Ibyiza byumunzani wizewe birimo koroshya uburyo bwo kwishyura ubushyuhe nubushobozi bwo kugabanya amakosa yo gupimwa adasubirwaho bitewe nurugero, ihindagurika ryubushyuhe bwikirere mubidukikije byimashini.