Kho Shim Pob Zeb Diamond Lapping Phaj - Tswj cov khoom tshem tawm rau Precision Thickness Tuning

Nyob rau hauv ib lub twj tso kua mis-rail high-pressure, qhov kev hloov kho shim txiav txim siab lub plunger qhov seem ntawm stroke-tus nqi uas cuam tshuam ncaj qha rau lub twj tso kua mis volumetric efficiency. Ib qho shim uas tuab heev txo cov hlab ntsha tawg, txo qis tus me nyuam lub siab; ib qho shim uas nyias dhau ua rau mob stroke, tab sis tuaj yeem ua rau lub plunger hauv qab thiab ua rau lub thoob puas tsuaj. Qhov yuav tsum tau tuab yog feem ntau tsis yog tus qauv loj- nws yuav yog 1.235 hli, thaum koj cov shim assortment tsuas muaj 1.20 hli thiab 1.25 hli. Cov txheej txheem ntawm kev txo qis shim lub thickness (filing los yog sanding ntawm ib txoj siv grinder) yog imprecise, feem ntau tshem tawm 0.05 hli nyob rau hauv ib tug pass thiab tsim ib tug uneven qhov chaw. Qhov no pob zeb diamond lapping phaj hloov uas workflow: nws yog atsau-abrasive ca lapping cuab tamuas tshem tawm cov khoom ntawm tus tswj tus nqi ntawm 2-5 µm ib feeb (nyob ntawm seb lub pob zeb diamond grit loj thiab siv siab), tso cai rau koj mus qhib ib tug 1.25 hli shim mus rau 1.235 hli nrog ib tug nto flatness tsawg tshaj li los yog sib npaug zos rau 0.002 hli. Qhov tshwm sim yog ib qho shim uas phim cov thickness xam raws nraim, tsis muaj cov burrs los yog tshav kub-tshem cov cheeb tsam uas sib tsoo tsim.

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Lub phaj lapping no tsis yog ib qho grit; nws yog adual-nto phajnrog ob qhov sib txawv zones:

Roughing tsam (100-grit pob zeb diamond):Ib tug 50-mm wide band nyob rau sab nrauv perimeter. Cov cheeb tsam no tshem tawm cov khoom ntawm 8-10 µm / min thiab yog siv rau kev txo qis hauv thawj zaug (piv txwv li, noj 1.30 mm shim mus rau 1.25 mm). Cov pob zeb diamond hais yog 150 µm nyob rau hauv txoj kab uas hla, embedded nyob rau hauv ib tug nickel-bond matrix uas tiv thaiv rub tawm.

Finishing cheeb tsam (400-grit pob zeb diamond):Sab hauv 80-mm txoj kab uas hla, nrog 40 µm pob zeb diamond hais. Cov cheeb tsam no tshem tawm 2-3 µm / min thiab yog siv rau qhov kawg dhau mus ua kom tiav lub hom phiaj tuab thiab qhov chaw tiav ntawm Ra Tsawg dua lossis sib npaug li 0.1 µm.

A laser-engraved nplaintawm lub phaj ntug qhia qhov kev tshem tawm ntawm txhua cheeb tsam (hauv µm ib feeb, ntawm tus qauv thauj khoom ntawm 10 N). Qhov no tso cai rau koj los xam lub sij hawm lapping: rau 0.015 hli txo nyob rau hauv qhov chaw tiav, koj lapped rau kwv yees li 5-7 feeb.

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Lub phaj yog tsim los ntawm acam khwb cia hlau substrate(GG25) nrog ib tug hardness ntawm HRB 95, uas muab ib tug nruj, tsis-deflecting puag. Cov pob zeb diamond hais yog electroplated rau saum npoo hauv anickel-matrix daim ntawv cog lusuas yog 0.5 mm tuab. Daim ntawv cog lus no yog mos txaus kom tso cai rau cov pob zeb diamond particles kom protrude (los ntawm kwv yees li 50% ntawm lawv txoj kab uas hla), tab sis nyuaj txaus los tiv thaiv lawv los ntawm detaching nyob rau hauv load.

Flatness:Lub lapping nto yog hauv av mus rau ib tug flatness ntawm tsawg tshaj li los yog sib npaug zos rau 0.003 mm nyob rau tag nrho cov 150 mm txoj kab uas hla, txheeb xyuas los ntawm ib tug interferometer.

Thermal expansion:Lub cam khwb cia hlau substrate muaj ib tug coefficient ntawm 11 × 10⁻⁶ /℃- sib piv cov hlau shims (12 × 10⁻⁶ /℃). Qhov no txhais tau hais tias lub phaj lapping thiab lub shim nthuav dav ntawm ze li qub, yog li tus nqi tshem tawm tseem zoo ib yam txawm tias lub phaj sov so thaum siv.

Kev siv lub phaj kom raug yog qhov tseem ceeb raws li lub phaj nws tus kheej. Lub shim yog tuav tawm tsam lub phaj siv amagnetic shim tuav(muag nyias), uas siv ib qho tas li 5 N siab. Tus tuav muaj ib daim ntawv qhia yas uas yuam adaim duab yim motion-Qhov no ua kom cov khoom tsis sib xws raug tshem tawm thoob plaws tag nrho cov shim nto, tiv thaiv "khoom noj khoom haus" uas tshwm sim nrog kev ncig.

Lubricant:Lub phaj yog siv nrog alup vaj(suav nrog) uas ntab tawm ntawm cov hlau tshem tawm thiab pob zeb diamond plua plav. Cov roj yog formulated nrog ib tug viscosity ntawm 32 cSt ntawm 40 degree, uas muab ib tug nyias zaj duab xis uas tiv thaiv loading ntawm pob zeb diamond nto.

Ntxuav:Tom qab txhua qhov kev siv, lub phaj yog so nrog daim ntaub microfiber; ib tug built-in scraper (ntawm ntug ntawm lub phaj) tshem tawm embedded hais.

Cov kev cob qhia feem ntau tswj hwm qhov sib txawv ntawm 30-50 thicknesses, uas yog kim thiab siv qhov chaw. Nrog rau lub phaj lapping no, koj tuaj yeem khaws cia li 5-6 qhov tuab tuab thiab laps lawv mus rau qhov loj me uas xav tau. Qhov no txo ​​qis kev nqis peev ntawm cov khoom lag luam los ntawm kwv yees li 70% thiab ua kom koj ib txwm muaj txoj cai shim rau ib qho kev tsim kho dua tshiab - tsis txhob tos rau shims xaj.

Q1: Kuv puas tuaj yeem siv lub phaj no rau lap shims uas twb hardened (HRC 55)? Puas yog lub pob zeb diamond grit tsuas yog polish lawv yam tsis tau tshem tawm cov khoom?
A: Pob zeb diamond yog cov ntaub ntawv nyuaj tshaj plaws, yog li nws yuav lap hardened steel zoo - tus nqi tshem tawm yog li ntawm 70% ntawm cov hlau annealed. Ntawm 5 N siab, koj yuav ua tiav 2-3 µm / min ntawm HRC 55 steel. Rau hardened shims, peb pom zoo kom siv roughing cheeb tsam ua ntej, txawm rau me me txo, raws li nws muab ib tug tshiab pob zeb diamond nto uas txiav ntau aggressively. Qhov chaw ua tiav yuav tseem tsim tau qhov chaw zoo.

Q2: Kuv yuav ua li cas thiaj paub tseeb tias cov shim thickness tseem tsis sib xws (tsis muaj taper) tom qab lapping?
A: Daim duab-yim tsab ntawv tsa suab yog qhov tseem ceeb. Magnetic shim tuav muaj xws li aphau ntawv qhia kev sib hloovuas tiv thaiv cov shim kom tsis txhob nyob hauv ib cheeb tsam - nws txav mus rau hauv ib lub voj nruam uas npog tag nrho cov phaj saum npoo. Yog tias koj pom lub taper (ib sab nyias dua li lwm qhov), koj yuav siv lub siab tsis sib xws; tus tuav lub caij nplooj ntoos hlav-loaded tsim sib npaug lub load. Peb kuj pom zoo kom tig lub shim 90℃ib nrab ntawm lub voj voog lapping kom them rau txhua tus tuav misalignment.

Q3: Lub phaj lapping zoo li "loading" (qhov saum npoo zoo li tsaus nti thiab tsis txiav sai li sai tau). Kuv yuav ntxuav nws li cas?
A: Cov tsos tsaus nti yog cov khoom siv hlau kos rau hauv pob zeb diamond nto. Siv cov suav nroghnav pob zeb-mos ceramic thaiv uas koj rub hla lub phaj rau 30 vib nas this nrog roj roj. Qhov no nthuav tawm cov pob zeb diamond tshiab thiab tshem tawm cov hlau sau. Tsis txhob siv cov txhuam hlau los yog daim ntawv abrasive rau ntawm pob zeb diamond nto - nws yuav ua rau daim ntawv cog lus puas. Tom qab hnav khaub ncaws, txiav tus nqi yuav tsum tau rov qab.

Q4: Kuv yuav tsum tau lap ib shim uas nyias nyias (0.8 hli). Cov hlau nplaum puas yuav ua haujlwm ntawm ib qho nyias, lossis nws puas yuav warp?
A: Cov khoom sib nqus muaj ibthaub qab phajuas txhawb lub shim tshaj nws tag nrho cheeb tsam, tiv thaiv nws los ntawm flexing. Rau shims thinner dua 1.0 hli, peb pom zoo kom siv tus tuav lub "thin-part adapter" - spacer uas tsa lub shim me ntsis kom cov hlau nplaum lub zog yog faib tusyees. Lapping ib daim nyias nyias yam tsis muaj qhov hloov pauv no tuaj yeem ua rau nws ua rau warp. Lub adapter suav nrog tus tuav (muag nyias).

Q5: Lub neej ntev npaum li cas ntawm lub phaj lapping yog dab tsi -Kuv tuaj yeem hlais ntau npaum li cas ua ntej lub pob zeb diamond tsis hnav?
A: Cov pob zeb diamond txheej yog kwv yees li 0.5 hli tuab thiab muaj pob zeb diamond concentration ntawm 150% (siab ceev). Nyob rau hauv ib txwm siv (5-10 N siab, nrog lapping roj), lub phaj yuav lap 500-800 shims ua ntej txiav tus nqi poob ho. Qhov chaw roughing yuav hnav sai dua; koj tuaj yeem txuas nws lub neej los ntawm kev siv thaj chaw ua tiav rau txhua qhov tab sis cov khoom hnyav tshaj plaws tshem tawm. Qhov taw qhia hnav- qhov tob tob ntawm lub phaj ntug- qhia thaum lub pob zeb diamond txheej raug txo rau 0.3 hli; ntawm qhov ntawd, kev hloov pauv tau pom zoo.

Q6: Kuv puas tuaj yeem siv lub phaj no los npog lwm qhov chaw tiaj tus, xws li lub cev txhaj tshuaj lub ntsej muag lossis lub twj tso kua mis plunger?
A: Lub phaj yog tsim los rau qhov chaw me me (shims mus txog 30 mm txoj kab uas hla). Rau qhov loj dua, lub phaj 150 hli txoj kab uas hla yuav me dhau. Lub pob zeb diamond nto yog tiaj tus thiab tuaj yeem hla qhov loj dua, tab sis daim duab-yim lub zog ua nyuaj nrog cov khoom uas tshaj lub phaj lub vojvoog. Peb pom zoo kom lub phaj tshwj xeeb rau shims thiab zoo sib xws me me, tiaj tus. Rau qhov loj dua, peb muab cais 300 mm txoj kab uas hla lapping phaj.

 

Txhawm rau ua kom koj qhov kev yuav khoom tau yooj yim thiab yooj yim, peb muab ntau yam kev xaiv them nyiaj ruaj ntseg:

Peb nyob ntawm no los ua kom koj cov txheej txheem xaj kev txhawj xeeb-dawb - xaiv txoj kev them nyiaj uas ua haujlwm zoo tshaj rau koj!

 

 

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