Ua rau saum npoo roughness hauv machining
Qhov ntxhib machined nto yog feem ntau tshwm sim los ntawm cov hauv qab no yog vim li cas:
Thawj yog thaj chaw seem, uas yog thaj chaw uas lub ntsiab txiav ntug thiab pab txiav ntug ntawm cov cuab yeej nyob twj ywm rau ntawm qhov chaw machined tom qab txiav.
Qhov thib ob yog scale burr. Qee cov hlau yas, xws li cov pa roj carbon tsawg, cov pa roj carbon nruab nrab, cov hlau tsis muaj steel, aluminium alloy, thiab lwm yam, yuav tsim cov ntses nplai zoo li burrs rau ntawm qhov chaw machined thaum lawv raug txiav ntawm qis lossis nruab nrab ceev nrog cov cuab yeej siv high-speed steel, uas. yog hu ua scale burr. Kev tsim cov nplai thiab cov pos yuav ua rau kom qhov roughness ntawm qhov chaw.
Tom ntej no, muaj chip buildup, uas yog tsim los ntawm cov tsub zuj zuj ntawm tej daim ntawm cov txiav ntug thaum lub sij hawm txiav txheej txheem. Thaum muaj nti buildup, qhov protruding ib feem yuav txiav mus rau hauv lub workpiece es tsis txhob ntawm tej ntug, thiab kos grooves ntawm txawv depths ntawm lub machined nto; Thaum cov qog qog poob tawm, ib feem ntawm cov qog nqaij hlav tuaj yeem ua raws li lub tshuab ua haujlwm thiab tsim cov burrs zoo. Ob leeg ntawm cov xwm txheej no yuav ua rau lub roughness ntawm machined nto ntawm ib feem kom nce.
Thaum kawg, muaj kev vibration. Thaum lub sij hawm txiav, cov txheej txheem txheej txheem ua rau lub sij hawm vibration vim tsis txaus rigidity, uas yuav kos kab txaij los yog ripple cov cim ntawm lub machined nto, thiab ho nce tus nqi nto roughness.
Cov yam ntxwv cuam tshuam rau saum npoo roughness hauv machining
Nyob rau hauv machining, dab tsi yam yuav ua rau seem seem, nti buildup, nplai pos thiab vibration? Cia peb saib:
Thawj qhov tseem ceeb yog qhov txiav nyiaj. Kev txiav tsis muaj xws li pub tus nqi thiab txiav ceev, ntawm cov uas tus nqi pub muaj qhov cuam tshuam loj tshaj plaws ntawm thaj chaw seem, thiab qhov nce ntawm tus nqi pub yuav ua rau qhov nce ntawm qhov seem seem. Qhov cuam tshuam ntawm kev txiav ceev ntawm qhov roughness yog feem ntau yog tshwm sim nyob rau hauv lub cim ntawm nplai pos thiab nti nodules. Thaum cov khoom txiav yog cov yas hlau thiab qhov txiav ceev yog qhov tsawg heev, nws tsis yooj yim los tsim chip buildup; Thaum txiav ceev yog siab heev, nws yog qhov zoo los txo cov yas deformation, yog li inhibiting tiam ntawm nplai pos. Yog li ntawd, ob qho tib si yuav txo qhov roughness ntawm qhov chaw. Thaum txiav cov ntaub ntawv nkig, qhov cuam tshuam ntawm kev txiav ceev me me, vim tias cov khoom deformation me me, yog li tus nqi ntawm qhov roughness kuj txo.
Qhov thib ob yog qhov geometric parameters ntawm lub cuab yeej. Cov kev ntsuas geometric ntawm cov cuab yeej feem ntau suav nrog cov hniav thiab lub kaum sab xis ntawm lub cuab yeej, ntawm cov uas lub vojvoog ntawm lub cuab yeej, lub kaum sab xis ntawm lub ntsiab thiab lub kaum sab xis deflection muaj qhov cuam tshuam zoo rau thaj chaw seem thiab kev co. Feem ntau, nyob rau hauv qhov chaw ntawm txaus rigidity ntawm lub tshuab cuab tam, thaum lub arc vojvoog ntawm lub cuab tam lub taub hau nce thiab lub ntsiab deflection lub kaum sab xis thiab sub deflection lub kaum sab xis txo, qhov nto roughness tus nqi yog me me. Txawm li cas los xij, yog tias qhov rigidity ntawm lub tshuab cuab yeej qis dhau lawm, lub vojvoog ntawm lub vojvoog ntawm lub cuab yeej yog loj dhau los yog lub ntsiab deflection lub kaum sab xis me dhau, nws yuav ua rau kev vibration vim yog txiav quab yuam ntau dhau, uas yuav ua rau tus nqi ntawm qhov roughness nce.
Qhov thib peb yog cov cuab yeej siv rau kev txiav. Qhov loj ntawm lub vojvoog arc ntawm qhov txiav ntug thiab lub sijhawm ua kom nws ntse yog txawv nrog cov khoom siv sib txawv. Txiav cov cuab yeej ntawm qee cov ntaub ntawv, xws li cov hlau ceev ceev, tuaj yeem ua kom pom tseeb, tab sis lub sijhawm tuav yog luv, yog li qhov roughness ntawm qhov chaw me me thaum txiav ntawm qhov ceev; Txawm li cas los xij, rau qee cov ntaub ntawv, xws li cemented carbide, lub vojvoog arc ntawm ntug yog loj dua tom qab sib tsoo, thiab qhov txiav nto roughness tus nqi me me ntawm kev kub ceev. Ntev npaum li cov ntaub ntawv tsim nyog raug xaiv raws li kev xav tau ntawm machining, qhov roughness ntawm lub tshuab tuaj yeem raug txo.
Qhov thib plaub yog cov khoom siv ua haujlwm. Qhov siab dua ntawm plasticity thiab qis dua qhov hardness ntawm cov khoom siv ua haujlwm, qhov ntau dua yuav tsim cov khib nyiab nodules, nplai pos, txias hardness thiab lwm yam tshwm sim, thiab qhov ntau dua qhov roughness. Yog li ntawd, qhov chaw roughness ntawm kev txiav high carbon steel, nruab nrab carbon steel thiab quenched thiab tempered steel yog me dua li ntawm txiav tsawg carbon steel; Qhov saum npoo roughness ntawm steel workpiece yog me dua li ntawm cam khwb cia hlau workpiece.