Kodi madera ogwiritsira ntchito ma bearing a mpira othamanga kwambiri ndi ati?

Angular kukhudzana mpira kubala opanga kumvetsa kuti ntchito ya spindle mkulu-liwiro wa CNC zitsulo kudula makina zida zimadalira kunyamula spindle ndi kondomu ake kumlingo ndithu.Makina opanga zida zamakampani akudziko langa akukula mwachangu, okhala ndi mitundu yaying'ono mpaka yayikulu, mtundu wazinthu komanso luso laukadaulo kuchokera kumunsi mpaka kumtunda, kuchuluka kwamakampani kuyambira ang'onoang'ono mpaka akulu, ndi makina opanga akatswiri omwe ali ndi magulu athunthu azinthu komanso kupanga koyenera. kamangidwe kapangidwa.Kulekerera kwa mayendedwe a spindle ndi ochepa.Iwo ali oyenerera makamaka kunyamula makonzedwe omwe amafunikira kulondola kwapamwamba kwambiri ndi mphamvu zothamanga.Iwo ali oyenerera makamaka kutengera makonzedwe a ma shafts a zida zamakina.Chifukwa cha kulimba kwake bwino, kulondola kwambiri, kunyamula katundu wambiri komanso kapangidwe kake kosavuta, mayendedwe ogubuduza samangogwiritsidwa ntchito popangira zida zamakina ambiri odulira, komanso amakondedwa ndi zida zamakina othamanga kwambiri.Kuchokera pamalingaliro a liwiro lalitali, mayendedwe ang'onoang'ono olumikizana ndi mpira m'mayendedwe ogubuduza, ma cylindrical roller bearings ndi achiwiri, ndipo mayendedwe odzigudubuza ndi oipitsitsa.

Mpira (ndiko kuti, mpira) wampira wolumikizana wamakona umazungulira ndikuzungulira, ndipo umapanga centrifugal force Fc ndi gyro torque Mg.Ndi kuwonjezeka kwa liwiro la spindle, mphamvu ya centrifugal Fc ndi gyro torque Mg idzawonjezeka kwambiri, zomwe zidzachititsa kuti kubereka kupangitse kupanikizika kwakukulu, zomwe zidzachititsa kuti kugwedezeka kwapadera, kuwonjezeka kwa kutentha, kuchepetsa kulondola. ndi moyo wofupikitsidwa.Choncho, pofuna kupititsa patsogolo ntchito yothamanga kwambiri, kuyesetsa kulikonse kuyenera kuchitidwa kuti athetse kuwonjezeka kwa Fc ndi Mg.Kuchokera mawerengedwe chilinganizo cha angular kukhudzana mpira fani Fc ndi MG, zimadziwika kuti kuchepetsa kachulukidwe zinthu mpira, awiri a mpira ndi kukhudzana ngodya ya mpira ndi opindulitsa kuchepetsa Fc ndi Mg, kotero tsopano mkulu- ma spindles othamanga nthawi zambiri amagwiritsa ntchito ngodya zolumikizana za 15 ° kapena 20 ° za mayendedwe ang'onoang'ono a mpira.Komabe, kukula kwa mpira sikungachepetsedwe kwambiri.Kwenikweni, zitha kukhala 70% yokha yamtundu wamtundu wa mpira, kuti zisafooketse kulimba kwake.Chinthu chofunika kwambiri ndi kufunafuna kusintha kwa zinthu za mpira.

Poyerekeza ndi GCr15 yokhala ndi zitsulo, makulidwe a silicon nitride (Si3N4) ceramics ndi 41% yokha ya kachulukidwe ake.Mpira wopangidwa ndi silicon nitride ndi wopepuka kwambiri.Mwachilengedwe, mphamvu ya centrifugal ndi torque ya gyro yomwe imapangidwa panthawi yozungulira kwambiri ndizochepa.zambiri.Panthawi imodzimodziyo, zotanuka modulus ndi kuuma kwa silicon nitride zoumba ndi nthawi 1.5 ndi 2.3 nthawi ya kubala zitsulo, ndi coefficient wa kukula matenthedwe ndi 25% yokha ya kubala zitsulo, amene angathe kusintha kuuma ndi moyo wa kubala, komanso Chilolezo chofananira cha kunyamula chimasintha pang'ono pazikhalidwe zosiyanasiyana za kutentha, ndipo ntchitoyo ndi yodalirika.Kuonjezera apo, ceramic imagonjetsedwa ndi kutentha kwakukulu ndipo sichimamatira kuzitsulo.Mwachiwonekere, gawo lopangidwa ndi silicon nitride ceramic ndiloyenera kusinthasintha kothamanga kwambiri.Zochita zasonyeza kuti ceramic mpira mayendedwe ang'onoang'ono kukhudzana mpira akhoza kuonjezera liwiro ndi 25% ~ 35% poyerekeza ndi lolingana zitsulo zitsulo mpira, koma mtengo ndi apamwamba.

M'mayiko akunja, zitsulo zokhala ndi mphete zamkati ndi zakunja ndi zinthu zogubuduza za ceramic pamodzi zimatchedwa ma bearings hybrid.Pakalipano, mayendedwe osakanizidwa ali ndi chitukuko chatsopano: chimodzi ndi chakuti zipangizo za ceramic zakhala zikugwiritsidwa ntchito popanga zodzigudubuza za zitsulo za cylindrical roller, ndipo zitsulo za ceramic cylindrical hybrid zawonekera pamsika;ina ndiyo kugwiritsa ntchito zitsulo zosapanga dzimbiri m'malo mokhala ndi zitsulo kuti apange mphete zamkati ndi zakunja, makamaka mphete yamkati.Popeza kuti coefficient of thermal expansion of steel stainless steel ndi 20% yaing'ono kusiyana ndi chitsulo chonyamula, mwachibadwa, kuwonjezeka kwa kukhudzana ndi kukhudzana komwe kumayambitsidwa ndi kuwonjezereka kwa kutentha kwa mphete yamkati kudzaponderezedwa panthawi yothamanga kwambiri.