Lub Hloov Ua Haujlwm III
1860s
Xim av & Sharpe cov tshuab kev siv lub tshuab milling universaling, 1861
Xyoo 1861, Frederick W. Howe, thaum ua haujlwm rau lub tuam txhab Providence Tool, nug Yauxej R. Brown ntawm Brown & Sharpe los daws qhov teeb meem ntawm milling spirals, xws li cov nplais ntawm kev xyaum ua twist. Cov no feem ntau yog xa los ntawm tes thaum lub sijhawm. [25] ( Helical Planing existed, tiam sis tsis yog hom txhais lus.) Brown tsim ib lub tshuab "universal milling" uas, pib ntawm nws qhov muag thawj zaug thaum lub Peb Hlis 1862, yog qhov zoo heev. Nws daws qhov teeb meem ntawm 3-axis mus ncig teb chaws (piv txwv li, lub looj uas peb tam sim no hu XYZ) ntau dua elegantly tshaj yav dhau los, thiab nws pub rau lub milling ntawm cov hlab uas siv lub taub hau indexed ua kom sib haum nrog lub rooj pub . Lub sij hawm "universal" tau siv rau nws vim nws tau npaj rau txhua hom kev ua haujlwm, nrog rau kev ua haujlwm hauv chav ua haujlwm, thiab tsis raug txwv nyob rau hauv daim ntawv thov raws li cov qauv tsim dhau los. (Howe tau tsim ib lub "universal miller" rau xyoo 1852, tab sis Brown's ntawm 1861 yog qhov kev txiav txim siab tau zoo.) [25]
Xim av kuj tsim thiab patented (1864) tsim cov tsim milling cutters nyob rau hauv uas cov lus sib tw ntawm cov hniav tsis cuam tshuam cov geometry ntawm daim ntawv. [16]
Cov kev tshwm sim ntawm lub xyoo 1860 tau qhib cov dej nyab thiab tab tom ua kev xyaum ua kom zoo nkauj.
