Izinto zokwakha ezizinzile ngokwezinga lokushisa. Qiniseka ukuthi amalungu ayinhloko okwakhiwa komshini aqukethe izinto ezingathinteki kalula ekushintsheni kwezinga lokushisa. Cabanga ngebhuloho (i-X-axis yomshini), izisekelo zebhuloho, i-guide rail (i-Y-axis yomshini), amabheringi kanye ne-Z-axis bar yomshini. Lezi zingxenye zithinta ngqo izilinganiso zomshini kanye nokunemba kokunyakaza, futhi zakha izingxenye zomgogodla we-CMM.
Izinkampani eziningi zenza lezi zingxenye nge-aluminium ngenxa yesisindo sayo esilula, ukusebenza kahle kwayo kanye nezindleko eziphansi. Kodwa-ke, izinto ezifana ne-granite noma i-ceramic zingcono kakhulu kuma-CMM ngenxa yokuqina kwazo kokushisa. Ngaphezu kweqiniso lokuthi i-aluminium ikhula cishe ngokuphindwe kane kune-granite, i-granite inezimfanelo ezinhle kakhulu zokunciphisa ukudlidliza futhi inganikeza ukuphela kobuso okuhle kakhulu lapho ama-bearings angahamba khona. I-granite, empeleni, ibilokhu iyindinganiso eyamukelwa kabanzi yokulinganisa iminyaka eminingi.
Nokho, kuma-CMM, i-granite inesici esisodwa esibi - inzima. Inkinga iwukukwazi, kungaba ngesandla noma nge-servo, ukuhambisa i-granite CMM ezisekelweni zayo ukuze ithathe izilinganiso. Enye inhlangano, i-LS Starrett Co., ithole ikhambi elithakazelisayo lale nkinga: i-Hollow Granite Technology.
Lobu buchwepheshe busebenzisa amapuleti e-granite aqinile kanye nemishayo ekhiqizwa futhi ihlanganiswe ukuze yakhe amalungu esakhiwo angenalutho. Lezi zakhiwo ezingenalutho zinesisindo esifana ne-aluminium ngenkathi zigcina izici zokushisa ezinhle ze-granite. I-Starrett isebenzisa lobu buchwepheshe kokubili amalungu okusekela ibhuloho kanye nebhuloho. Ngendlela efanayo, basebenzisa i-ceramic engenalutho ebhuloho kuma-CMM amakhulu lapho i-granite engenalutho ingasebenzi.
Ama-Bearings. Cishe bonke abakhiqizi be-CMM bashiye izinhlelo ezindala zokuthwala ama-roller, bakhetha izinhlelo zokuthwala umoya eziphezulu kakhulu. Lezi zinhlelo azidingi ukuthintana phakathi kwe-bearings kanye nendawo yokuthwala ngesikhathi sokusetshenziswa, okuholela ekugugeni ngokuphelele. Ngaphezu kwalokho, ama-air bearings awanayo izingxenye ezihambayo futhi, ngakho-ke, awanayo umsindo noma ukudlidliza.
Kodwa-ke, ama-air bearings nawo anomehluko wawo ongokwemvelo. Okungcono kakhulu, funa uhlelo olusebenzisa i-graphite enezimbobo njengento yokuthwala esikhundleni se-aluminium. I-graphite kula ma-bearings ivumela umoya ocindezelwe ukuthi udlule ngqo ku-porosity yemvelo etholakala ku-graphite, okuholela kungqimba lomoya oluhlakazekile ngokulinganayo phezu kwendawo yokuthwala. Futhi, ungqimba lomoya olukhiqizwa yileli bearings luncane kakhulu - cishe u-0.0002″. Ama-aluminium bearings ajwayelekile anezimbobo, ngakolunye uhlangothi, avame ukuba negebe lomoya phakathi kuka-0.0010″ no-0.0030″. Igebe lomoya elincane lingcono ngoba linciphisa ukuthambekela komshini kokugxuma emkhunjini womoya futhi kuphumela emshinini oqinile kakhulu, onembe kakhulu futhi ophindaphindwayo.
Usebenzisa i-Manual vs. DCC. Ukunquma ukuthi uzothenga i-CMM esetshenziswa ngesandla noma ezenzakalelayo kulula kakhulu. Uma indawo yakho yokukhiqiza eyinhloko igxile ekukhiqizeni, khona-ke ngokuvamile umshini olawulwa yikhompyutha ngqo uyindlela engcono kakhulu ngokuhamba kwesikhathi, yize izindleko zokuqala zizoba phezulu. Ama-CMM asetshenziswa ngesandla afaneleka uma ezosetshenziswa ngokuyinhloko emsebenzini wokuhlola wesihloko sokuqala noma wobunjiniyela obubuyela emuva. Uma wenza okuningi kokubili futhi ungafuni ukuthenga imishini emibili, cabanga nge-DCC CMM enama-servo drive angadingi ukuthengiselana, okuvumela ukusetshenziswa ngesandla uma kudingeka.
Uhlelo lokushayela. Uma ukhetha i-DCC CMM, funa umshini ongenawo i-hysteresis (i-backlash) ohlelweni lokushayela. I-Hysteresis ithinta kabi ukunemba kokubeka komshini kanye nokuphindeka kwawo. Ama-friction drive asebenzisa i-direct drive shaft ene-precision drive band, okuholela ku-zero hysteresis kanye nokudlidliza okuncane.
Isikhathi sokuthunyelwe: Jan-19-2022