Sib tham hauv CNC Machining - Ib qho kev piav qhia
Sib tham(振刀 hauv Suav, lus "vibrating cuab tam") yog ib qho ntawm feem ntau thiab puas dynamic instability phenomena nyob rau hauv CNC machining kev khiav hauj lwm. Nws hais txogtus kheej -zoo siab vibrationsuas tshwm sim ntawm cov cuab yeej txiav thiab cov khoom ua haujlwm thaum lub sij hawm tshem tawm cov khoom, ua kom pom kev vibration ntawm lub tshuab nto, ceev cov cuab yeej hnav, thiab nyob rau hauv cov xwm txheej hnyav, cov cuab yeej puas tsuaj los yog lub tshuab puas.
Hom ntawm Chatter
表格
| Hom | Mechanism | Hom Zaus |
|---|---|---|
| Regenerative Sib Tham | Theem lag ntawm kev txiav ua tiav ntawm tib qhov chaw | Tsawg mus rau nruab nrab (ntau pua Hz) |
| Hom -Coupling Chatter | Kev sib cuam tshuam ntawm ob lossis ntau hom kev vibration | Nruab nrab |
| Forced Vibration | Sab nraud excitation (tsis sib npaug spindle, faulty bearings) | Matches excitation qhov chaw |
| Kev sib txhuam sib tham | Lo -kev coj cwj pwm plam ntawm lub cuab yeej- nti interface | Tsawg |
Ntawm cov no,regenerative sib thamyog qhov nthuav dav tshaj plaws thiab zoo -study mechanism hauv milling, tig, thiab drilling.
Keeb kwm ntawm kev sib tham
1. Txiav Parameters
Tshaj spindle ceev lossis qhov tob ntawm kev txiav: Pushes lub kaw lus tshaj nws txoj kev ruaj ntseg txwv
Tsis tsim nyog pub tus nqi: Pub tsawg dhau tuaj yeem ua rau rubbing thiab txhawb kev vibration
Tsis zoo chip load faib: Kev sib koom ua ke tsis sib xws hauv milling (tshwj xeeb tshaj yog slotting lossis cornering)
2. Cov cuab yeej System Factors
Cov cuab yeej overhang (L / D ratio): Cov cuab yeej siv ntev dua muaj qhov nruj nruj thiab lub ntuj zaus
Cov cuab yeej tsis txaus rigidity: Cov tuav lub cuab yeej tsis muaj zog, hnav tsoos tsho, lossis clamping tsis raug
Cov cuab yeej tsis sib npaug: Asymmetric cuab tam geometry los yog tsis sib xws cov rooj zaum
Hnav los yog puas tej ntug: Irregular txiav quab yuam induce vibration
3. Workpiece thiab teeb
Tsis zoo workpiece clamping: Tsis txaus fixture rigidity tso cai rau workpiece txav
Nyias-cov phab ntsa lossis cov khoom ua haujlwm: Tsawg tus qauv nruj thiab damping
Khoom siv: Hard, gummy, los yog ua hauj lwm - cov ntaub ntawv hardening (xws li, titanium, stainless hlau, Inconel) yog feem ntau hais lus
4. Tshuab cuab tam
Hnav spindle bearings: Txo bearing txhav thiab nce runout
Cov khoom siv tshuab xoob lossis puas: Cov kev taw qhia, pob ntsia hlau, lossis cov txuas txuas nrog ntau qhov rov qab
Lub tshuab tsis zoo damping: Lub teeb yuag siab - cov tshuab ceev yuav tsis muaj cov txheej txheem damping txaus
5. Txheej txheem Dynamics
Regenerative nyhuv: Lub wavy nto sab laug los ntawm tus hniav dhau dhau los modulates lub nti thickness nyob rau hauv lub pass tam sim no, tsim ib lub tswv yim voj
Txheej txheem damping: Ntawm qhov txiav ceev qis, lub cuab yeej flank rub tawm ntawm lub workpiece muab stabilizing damping; cov nyhuv no diminishes ntawm siab dua speeds
Qhov tshwm sim ntawm Chatter
表格
| Yam | Kev cuam tshuam |
|---|---|
| Nto Zoo | Qhov saum npoo tsis zoo, waviness, thiab qhov tsis raug |
| Tool Lub Neej | Kev tawg ntxov ntxov, tawg, lossis hnav sai sai |
| Tshuab Kev Noj Qab Haus Huv | Kev puas tsuaj rau spindle bearings, cov kev taw qhia, thiab cov khoom siv |
| Productivity | Txo cov khoom tshem tawm cov nqi thiab nce lub sij hawm voj voog |
| Kev nyab xeeb | Risk ntawm lub cuab yeej ejection los yog workpiece dislodgement |
Txoj kev tshem tawm los yog txwv tsis pub sib tham
Parameter Optimization
Spindle ceev xaiv: SivStability lobe daim duab (SLDs)txhawm rau txheeb xyuas thaj chaw ceev ceev (lobes) uas tsis txhob muaj kev sib tham
Txo qhov tob ntawm kev txiav los yog qhov dav ntawm kev txiav: Ua haujlwm qis dua qhov txwv tsis pub muaj kev ruaj ntseg tseem ceeb
Nce pub rau tus hniav: Ntau dua nti loads tuaj yeem txhim kho cov txheej txheem damping
Tooling Solutions
Txo cov cuab yeej overhang: Siv cov cuab yeej ua tau luv tshaj plaws thiab cov tuav tuav ua ke
Siv cov cuab yeej siab -rigidity tuav: Hydraulic chucks, shrink - haum tuav, los yog milling chucks es tsis txhob collet chucks
Siv qhov sib txawv - suab lossis hloov pauv -helix kawg mills: Txhaum cov txheej txheem regenerative los ntawm qhov tsis sib xws ntawm cov hniav
Xyuas kom cov cuab yeej sib npaug: Dynamic ntsuas qhov siab - khiav ceev
Workpiece thiab Fixture
Txhim kho clamping rigidity: Siv cov kev txhawb nqa ntxiv, tailstocks, lossis damping fixtures
Optimize workpiece orientation: Muab cov kev taw qhia nruj tshaj plaws tiv thaiv kev txiav quab yuam
Tshuab thiab txheej txheem txhim kho
Active damping systems: Piezoelectric los yog magnetorheological dampers
Tiag -lub sij hawm sib tham nrhiav thiab tsuj: Acoustic emission los yog quab yuam sensors nrog adaptive spindle ceev tswj
Trochoidal lossis siab -cov tswv yim zoo milling: Tswj cov cuab yeej kev sib koom ua ke kom tsis txhob muaj kev hloov pauv sai
