Nā mea kūkulu hale paʻa wela.E hōʻoia i nā lālā mua o ka hana ʻana i ka mīkini i nā mea liʻiliʻi i hiki ke maʻalahi i nā ʻano wela.E noʻonoʻo i ke alahaka (ka mīkini X-axis), ke kākoʻo o ke alahaka, ke ala alakaʻi (ka mīkini Y-axis), nā bearings a me ka pahu Z-axis o ka mīkini.Hoʻopili pololei kēia mau ʻāpana i nā ana a me ka pololei o ka mīkini, a ʻo ia nā ʻāpana iwi kuamoʻo o CMM.
Nui nā hui e hana i kēia mau ʻāpana mai ka alumini ma muli o kona kaumaha māmā, machinability a me ke kumu kūʻai haʻahaʻa.Eia nō naʻe, ʻoi aku ka maikaʻi o nā mea e like me ka granite a i ʻole ka ceramic no nā CMM ma muli o ko lākou kūpaʻa wela.Ma waho aʻe o ka hoʻonui ʻana o ka alumini ma kahi o ʻehā mau manawa ʻoi aʻe ma mua o ka granite, ʻoi aku ka maikaʻi o nā hiʻohiʻona vibration dampening a hiki ke hāʻawi i kahi hopena maikaʻi loa e hiki ai i nā bearings ke hele.ʻO Granite ka mea i ʻae ʻia no ke ana ʻana no nā makahiki.
No nā CMM, akā naʻe, hoʻokahi drawback ka granite-he kaumaha.ʻO ka pilikia ka hiki, ma ka lima a i ʻole ma ka servo, e hoʻoneʻe i kahi CMM granite a puni ma luna o kona mau koʻi e lawe i nā ana.Ua loaʻa i kahi hui, ʻo The LS Starrett Co., kahi hopena hoihoi i kēia pilikia: Hollow Granite Technology.
Ke hoʻohana nei kēia ʻenehana i nā pā pōhaku paʻa a me nā kaola i hana ʻia a hui ʻia e hana i nā lālā hollow structural.Ua like ke kaumaha o kēia mau hale hollow e like me ke alumini me ka mālama ʻana i nā ʻano wela maikaʻi o ka granite.Hoʻohana ʻo Starrett i kēia ʻenehana no nā lālā kākoʻo alahaka a me ke alahaka.Ma ke ʻano like, hoʻohana lākou i ka ceramic hollow no ke alahaka ma nā CMM nui loa i ka wā ʻaʻole hiki ke hoʻohana i ka granite hollow.
Piʻi.Ma kahi kokoke i nā mea hana CMM a pau i haʻalele i nā ʻōnaehana wili kahiko ma hope, e koho ana i nā ʻōnaehana lawe lewa kiʻekiʻe loa.ʻAʻole pono kēia mau ʻōnaehana i ka hoʻopili ʻana ma waena o ka bearing a me ka ʻili o ka bearing i ka wā e hoʻohana ai, e hopena i ka ʻaʻahu ʻole.Eia kekahi, ʻaʻohe wahi neʻe o nā ea a no laila, ʻaʻohe walaʻau a haʻalulu paha.
Eia nō naʻe, loaʻa nā ʻokoʻa like ʻole o ka ea bearings.Ma ke kūpono, e ʻimi i kahi ʻōnaehana e hoʻohana ana i ka graphite porous e like me ka mea lawe ma kahi o ka alumini.ʻO ka graphite i loko o kēia mau bearings hiki ke hele pololei i ka ea i hoʻopaʻa ʻia i loko o ka porosity kūlohelohe i loaʻa i ka graphite, e hopena i kahi papa o ka ea i hoʻopuehu loa ma ka ʻili o ka bearing.Eia kekahi, ʻo ka papa o ka ea i hana ʻia e kēia bearing he lahilahi loa-ma kahi o 0.0002″.ʻO nā bearings alumini ported maʻamau, ma ka ʻaoʻao ʻē aʻe, loaʻa i kahi ākea ea ma waena o 0.0010 ″ a me 0.0030 ″.ʻOi aku ka maikaʻi o kahi ʻāpana ea liʻiliʻi no ka mea e hōʻemi ana i ka manaʻo o ka mīkini e paʻi ma luna o ka cushion ea a loaʻa i kahi mīkini ʻoi aku ka ʻoi aku ka paʻa, pololei a me ka hana hou.
Manual vs. DCC.ʻO ka hoʻoholo ʻana inā e kūʻai i kahi CMM manual a i ʻole ka mea maʻalahi.Inā hoʻokumu ʻia kāu ʻenehana hana mua, a laila ʻo ka mīkini hoʻokele kamepiula pololei kāu koho maikaʻi loa i ka holo lōʻihi, ʻoiai ʻoi aku ka kiʻekiʻe o ke kumu kūʻai mua.Kūpono nā CMM manual inā e hoʻohana mua ʻia no ka hana nānā ʻatikala mua a i ʻole no ka ʻenekinia hoʻohuli.Inā hana ʻoe i nā mea ʻelua a ʻaʻole makemake ʻoe e kūʻai i nā mīkini ʻelua, e noʻonoʻo i kahi DCC CMM me ka hoʻokuʻu ʻana i nā servo drive, e ʻae i ka hoʻohana lima inā pono.
Pūnaehana hoʻokele.Ke koho ʻana i kahi DCC CMM, e ʻimi i kahi mīkini me ka hysteresis ʻole (backlash) i ka ʻōnaehana hoʻokele.Hoʻopilikia maikaʻi ʻo Hysteresis i ka pololei o ka hoʻonohonoho ʻana a me ka hana hou ʻana.Hoʻohana ka Friction drive i kahi kumu hoʻokele pololei me kahi pahu pahu pololei, e hopena i ka hysteresis ʻole a me ka haʻalulu liʻiliʻi.
Ka manawa hoʻouna: Jan-19-2022