Fixture cov ntaub ntawv yog lub hauv paus tseem ceeb hauv kev tsim khoom, cuam tshuam ncaj qha rau lub teeb lub zog, hnav tsis kam, thiab kev pabcuam lub neej. Raws li kev thov thiab kev ua tau zoo, lawv feem ntau muab faib ua peb pawg hauv qab no:
1. Cov khoom siv hlau
- Cov pa roj carbon steel (piv txwv li, 45 # steel, Q235): Tus nqi qis, kev ua haujlwm yooj yim, haum rau cov khoom siv dav dav, tab sis nrog kev hnav tsis zoo. Hardness feem ntau yog HRC20-30 (xa mus rau * Mechanical Design Handbook*).
- Alloy steel (xws li 40Cr, GCr15): Hardness tuaj yeem nce los ntawm kev kho cua sov (HRC50-}60), siv rau cov khoom siv siab, xws li tsheb vuam fixtures.
- Stainless hlau (xws li, 304, 316): Corrosion resistant, haum rau cov khoom noj khoom haus thiab kev kho mob kev lag luam fixtures, tab sis kim dua.
2. Cov khoom siv tsis yog-nws yog xim hlau
- Engineering plastics (xws li, nylon, PEEK): Lub teeb yuag, insulating, haum rau cov khoom siv hluav taws xob sib dhos, qhov kub tsis kam mus txog 250℃(PEEK cov ntaub ntawv: Victrex technical report).
- Cov ntaub ntawv sib xyaw (piv txwv li, carbon fiber reinforced plastics): siab zog thiab qaug zog, siv nyob rau hauv aerospace fixtures, tab sis kim.
3. Cov khoom siv tshwj xeeb
- Carbide (xws li, YG8): Hardness HRA90 los yog siab dua, siv nyob rau hauv precision sib tsoo fixtures, tab sis nkig.
- Ceramic materials (e.g., alumina): High temperature resistance (>1500 degree), tab sis nkig, txwv rau kev ua haujlwm tshwj xeeb.
