CNC Precision Machining Nto Finish - Xov Xwm

Nto Finish Capabilities ntawm CNC Precision Machining

1. Hom Nto Roughness Ranges los ntawm txheej txheem

表格

CNC txheej txheem	Hom Ra Range	Optimal Ra Achievable	Sau ntawv
Rough Milling	3.2 – 12.5 μm	~3.2 μm	Kev tshem tawm cov khoom siv siab; pom cov cuab yeej cim
Ua tiav Milling	0.8 – 3.2 μm	~0.4 μm	Fine stepover, siab spindle speeds, cov cuab yeej ntse
Rough tig	1.6 – 6.3 μm	~1.6 μm	Hnyav txiav rau cov khoom tshem tawm
Precision tig	0.4 – 1.6 μm	~0.2 μm	Fine feeds, polished inserts, ruaj khov teeb
Drilling	1.6 – 6.3 μm	~0.8 μm	Reaming txhim kho mus rau 0.4-1.6 μm
Reaming	0.4 – 1.6 μm	~0.2 μm	Zoo heev rau precision bores
Precision sib tsoo	0.05 – 0.4 μm	~0.025 μm	Yuav tsum tau lub tshuab nruj, zoo grit log
CNC Honing	0.05 – 0.4 μm	~0.025 μm	Hla -hatch qauv rau lubrication retention
Lapping	0.012 – 0.1 μm	~0.01 μm	Dawb abrasive txheej txheem; qeeb heev tshem tawm cov khoom
Polishing / Buffing	0.025 – 0.2 μm	~0.01 μm	Phau ntawv los yog neeg hlau; kawg aesthetic/functional finish
Superfinishing	0.01 – 0.1 μm	~0.005 μm	Tshwj xeeb rau cov kabmob sib tw, hydraulic spools
Pob zeb diamond tig	0.005 – 0.05 μm	~0.002 μm	Ib qho - taw tes pob zeb diamond ntawm cov hlau tsis yog -ferrous; optical-qeb nto

2. Factors Influencing Achievable Surface Finish

Txiav Parameters:

Pub tus nqi: Qhov tseem ceeb tshaj plaws; cov khoom qis qis txo qhov theoretical roughness (Rt ≈ f² / 8r, qhov twg f=pub, r=lub qhov ntswg radius)

Txiav ceev: Kev nrawm dua feem ntau txhim kho kev ua tiav los ntawm kev txo qis ua - nce ntug tsim

Qhov tob ntawm Txiav: Kev ua tiav tiav siv qhov tob me me (0.05-0.2 hli) kom txo qis deflection thiab kev co

Tool Geometry & Condition:

Lub qhov ntswg vojvoog: Loj dua radii (1.2-2.4 mm rau tig) kis nti tsim hla ntev arc, txo cov qhab nia

Rake kaum sab xis: Qhov zoo rake txo qhov txiav quab yuam thiab rhuav

Cov cuab yeej hnav: Hnav los yog chipped npoo degrade tiav dramatically; tiag - lub sijhawm saib xyuas tseem ceeb

Khoom siv ua haujlwm:

Aluminium alloys (6061, 7075): Zoo heev machinability; yooj yim ua tiav Ra 0.2-0.4 μm

Dawb-machining steels (12L14, 11SMn30): Ua tiav zoo nrog cov qauv ntsuas

Stainless hlau (304, 316): Ua hauj lwm -hardening tendency; xav tau cov cuab yeej ntse, pom kev ceev

Titanium alloys (Ti-6Al-4V): Tsis zoo thermal conductivity; nyuaj kom ua tiav

Hardened steels (>45 HRC): Yuav tsum tau sib tsoo lossis nyuaj tig nrog CBN / PCD cov cuab yeej

Tshuab Rigidity & Stability:

Spindle runout <2 μm qhov tseem ceeb rau kev ua tiav zoo

Kev tiv thaiv - kev ntsuas kev vibration: tuned huab hwm coj dampers, nruj kev ua haujlwm, sib npaug cov cuab yeej

Thermal stability: kub-tswj ib puag ncig rau sub-micron tiav

Coolant & Lubrication:

Siab -siab coolant (70–150 bar) rau nti khiav tawm thiab tswj kub

Yam tsawg kawg nkaus kom muaj nuj nqis lubrication (MQL) los yog cryogenic txias rau cov ntaub ntawv tshwj xeeb

Ua kom zoo coolant concentration los tiv thaiv residue thiab corrosion

3. Txheej Txheem Txheej Txheem rau Ultra-Precision Finishes

表格

Target Ra	Yuav tsum tau ua ntu zus	Daim ntawv thov
3.2 – 6.3 μm	Standard CNC milling / tig	General mechanical qhov chaw, structural Cheebtsam
0.8 – 1.6 μm	Precision CNC nrog optimized tsis	Cov kabmob rooj zaum, sealing nto, nruab nrab -precision fits
0.2 – 0.4 μm	Zoo CNC + tuaj yeem hlawv / polishing	Hydraulic Cheebtsam, valve spools, precision shafts
0.05 – 0.1 μm	Sib tsoo + honing los yog lapping	Roj txhaj tshuaj nozzles, aerospace bearings, kev kho mob implants
< 0.025 μm	Superfinishing, pob zeb diamond tig, los yog polishing	Cov iav tsom iav, cov khoom siv semiconductor, cov qauv ntsuas

4. Kev Ntsuas & Kev Ntsuas

Hu rau txoj kev: Stylus profileometers (nrog rau Ra 0.025–12.5 μm); pob zeb diamond tip traces nto profile

Tsis yog -Txoj Kev Sib cuag: Dawb lub teeb interferometry, confocal microscopy (rau Ra <0.1 μm los yog mos nto)

Atomic Force Microscopy (AFM): Rau nanometer - scale roughness ntsuam xyuas (Ra <0.01 μm)

5. Tswv yim txwv & kev txiav txim siab

Economic Threshold: Ua tiav Ra < 0.4 μm ntawm cov pa CNC xav tau exponentially nce lub sij hawm thiab cov cuab yeej siv; kev sib tsoo lossis lapping feem ntau raug nqi ntau dua - siv tau qis dua qhov pib no

Cov khoom txwv: Ferrous cov ntaub ntawv tsis tuaj yeem ua tiav kho qhov muag -qib pob zeb diamond- tig tiav; yuav tsum tau ncej- txheej txheem polishing lossis npib tsib xee plating ua raws li pob zeb diamond tig

Geometry txwv: Cov yam ntxwv sab hauv, cov kab noj hniav sib sib zog nqus, thiab cov contours nyuaj txwv kev nkag mus rau kev ua haujlwm zoo

Kev sib raug zoo: Tswj Ra 0.2 μm thoob plaws cov khoom tsim khoom xav tau nruj SPC, kev tswj lub neej, thiab kev tswj ib puag ncig

Cov ntsiab lus

表格

Ua tiav qeb	Ra Range	Txoj kev CNC	Piv txwv Daim Ntawv Thov
Txheem machined	1.6 – 6.3 μm	Pa milling / tig	Cov kab nrib pleb, vaj tse
Precision machined	0.4 – 1.6 μm	Optimized CNC tsis	Shafts, gears, general bearings
Zoo machined	0.1 – 0.4 μm	High - CNC ceev, zoo cuab yeej	Hydraulic pistons, valve Cheebtsam
Hauv av / honed	0.025 – 0.1 μm	Precision sib tsoo + honing	Aerospace bearings, roj injectors
Super{0}}ua tiav	0.005 – 0.025 μm	Superfinishing, lapping, pob zeb diamond tig	Optical Cheebtsam, semiconductor, kho mob

Xaus: Niaj hnub nimno CNC precision machining tuaj yeem ua tiav nto tiav los ntawmRa 3.2 μm mus rau kwv yees li 0.2 μmlos ntawm optimized txiav tsis, tooling, thiab tshuab tej yam kev mob. Rau cov kev xav tau hauv qab Ra 0.1 μm, cov txheej txheem ntxiv (sib tsoo, honing, lapping, superfinishing, lossis pob zeb diamond tig) feem ntau tsim nyog. Qhov ua tiav tiav yog nyob ntawm kev sib koom ua ke ntawm kev ua kom zoo ntawm lub tshuab muaj peev xwm, cov khoom siv, cov cuab yeej siv tshuab, thiab kev tswj ib puag ncig- sib npaug tiv thaiv kev lag luam ntawm cov khoom ntim thiab cov nqi ib feem.

CNC Precision Machining nto tiav