Sanding ntawv: GOST, loj, cim, hom, chaw tsim tshuaj paus

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

Sanding ntawv yog qhov xav tau tshaj plaws thaum ua haujlwm nrog cov khoom siv ntoo. Txij li cov ntoo muaj qhov ntxhib saum npoo, craftsmen yuav luag ib txwm siv xws li emery kom tshem tawm nws. Nws yog dab tsi? Sandpaper los yog sandpaper yog cov khoom siv abrasive, lub hom phiaj tseem ceeb ntawm kev ua kom zoo meej smoothness rau yuav luag txhua qhov chaw.

paper-backed emery

Muaj ob peb hom ntawv xuab zeb. Txawm li cas los xij, tsuas yog qee qhov ntawm lawv yog cov neeg nyiam tshaj plaws. Feem ntau siv yog emery ntawm daim ntawv lossis ntaub.

Yog tias peb tham txog cov ntawv hauv paus ntawm qhov khoom no, feem ntau nws yog qhov muaj txiaj ntsig zoo ntawm cov khoom siv. Qhov no yog ib qho tseem ceeb heev, vim nws yuav txiav txim siab dab tsi txhua yam kev puas tsuaj rau daim ntawv tuaj yeem tiv taus. Txhawm rau ua kom cov kev pabcuam lub neej thiab kev siv ntau, qee zaum cov ntawv xuab zeb tuaj yeem ua nrog lub hauv paus tsis muaj dej.

Qhov zoo ntawm cov khoom siv no:

• tus nqi khoom qis, tshwj xeeb tshaj yogthaum piv rau cov khoom sib tsoo ntxiv uas muag ntawm qhov xyaum;
• siv hom ntawv xuab zeb no, koj tsis tas yuav txhawj xeeb tias lub hauv paus yuav ntev dua hauv cov txheej txheem;
• Daim ntawv rov qab sanding ntawv tuaj yeem coated nrog tsawg abrasive thaum lub sijhawm tsim khoom.

Txawm li cas los xij, kuj tseem muaj qhov tsis zoo, uas suav nrog kev hnav tsis zoo, nrog rau lub zog qis hauv daim ntawv.

Fabric puag

Rau kev tsim cov ntawv xuab zeb nrog lub hauv paus, paj rwb feem ntau yog siv, uas yog pre-kho nrog ib tug tshwj xeeb resin. Nws yog vim hais tias ntawm no txoj kev ntawm ntau lawm hais tias cov ntaub emery yog yus muaj zog tiv thaiv dej, txhim kho saj zawg zog, thiab kuj yog yus muaj los ntawm ib tug heev zog.

Qhov tsis zoo ntawm cov tawv nqaij zoo li no suav nrog qhov tseeb tias cov paj rwb yuav ntev dua thaum ua haujlwm. Qhov thib ob qhov tsis zoo yog tus nqi siab dua piv rau lwm cov hauv paus, txij li paj rwb nws tus kheej kim dua, ntxiv rau, yuav tsum muaj cov resin tshwj xeeb rau kev tsim khoom.

Nws yuav tsum tau ntxiv tias cov khw tshwj xeeb tam sim no muag cov ntaub ntawv sib xyaw ua ke. Cov emery no yog ua los ntawm cov ntawv thiab ntaub ntaub nplaum ua ke.

Hom emery raws li txoj kev siv cov nplej

Sandpaper txawv tsis yog nyob rau hauv lub hauv paus, tab sis kuj nyob rau hauv hom kev sib tsoo grain siv nyob rau hauv lub creation.

1. thawj hom yog ntawv nrog qhib filling. Thaum lub sij hawm tsim cov ntaub ntawv no, cov nplej yog txau rau hauv ib txoj kev uas yuav npog li 60% ntawm tag nrho cov cheeb tsam ntawm daim tawv nqaij. Qhov zoo ntawm cov chav kawm no suav nrog qhov tseeb tias thaum lub sijhawm ua haujlwm nws yuav tsis txhaws nrog cov khib nyiab vim muaj qhov sib txawv loj ntawm cov nplej ntawm cov abrasive. Feem ntau, hom emery no yog siv los ua cov txheej txheem ntoo lossis cov chaw nrog qhov nruab nrab ntom.
2. hom thib ob yog qhov kaw kaw. Hom ntawv no xav tias tag nrho lub hauv paus ntawm daim tawv nqaij yog npog nrog ib txheej tuab ntawm cov nplej thaum lub sij hawm tsim khoom. Kev siv cov ntawv xuab zeb qib no yog qhov zoo rau cov tawv tawv, tab sis nws yuav tsum tau ua tib zoo saib xyuas vim nws txhaws nrawm heev.

Abrasive grit rau ntawv xuab zeb

Hnub no, cov nplej sib txawv tau siv los ua cov ntawv lossis cov khoom siv tho. Raws li qhov no, 4 hom khoom sib txawv tuaj yeem paub qhov txawv:

• Ceramic abrasive. Hom abrasive no yog ib qho nyuaj tshaj plaws, thiab yog li nws yog siv rau kev ua cov khoom siv ntoo. Nws yog tsim nyob rau hauv daim ntawv tshwj xeeb tapes.
• Silicon carbide. Hom nplej no yog tus cwj pwm los ntawm qhov ntsuas lub zog qis, nrog rau nruab nrab hnav tsis kam. Lub peev xwm ntawm cov khoom no yog sib tsoo lub cev hlau, fiberglass, thiab lwm yam.
• Alumina. Hom no belongs rau lub cev tsis taus, vim nws tawg sai heev nyob rau hauv txhua yam kev nyuaj siab. Txawm li cas losqhov tsis zoo no tseem tuaj yeem ua qhov zoo dua, txij li yog tias nws tawg, cov npoo tshiab yuav tsim rau kev sib tsoo, uas txhais tau hais tias cov emery tuaj yeem siv tau ntev dua.
• Garnet. Feem ntau, daim ntawv nrog xws li cov khoom abrasive yog siv los ua ntau hom ntoo. Hom abrasive no suav hais tias yog ib qho ntawm cov softest, thiab yog li ntawd nws hnav tsis kam yog tsawg heev. Txhawm rau ua haujlwm nrog nws, koj yuav tsum muaj kev ua siab ntev, txij li cov txheej txheem ntawm kev sib tsoo nrog cov ntawv no nyuaj heev.

Sandpaper marking

Kev xaiv ntawm cov ntawv xuab zeb yog tswj los ntawm GOST. Nyob rau hauv cov ntaub ntawv no, grain yog qhia raws li lub ntsiab parameter, uas yog denoted los ntawm tsab ntawv P, thiab cov kev txwv ntawm no parameter yog cov zauv los ntawm 12 mus rau 2500. Nws yog ib qho tseem ceeb kom nkag siab tias qhov loj dua tus naj npawb, qhov me me ntawm cov nplej. ntawm daim ntawv. Nws tseem tsim nyog sau cia tias hauv qee qhov qub Soviet koom pheej GOST USSR tau siv. Hauv qhov no, tus lej 20-N yuav qhia rau ntawm qhov cim. Hauv qhov no, nws yog ib qho tseem ceeb kom paub tias kaum tawm microns ntawm kev sib tsoo yog qhia. Yog tias koj xav tau qhia tus lej yooj yim ntawm microns, ces cov cim yuav zoo li no: M20. Kev faib tawm kwv yees ntawm hom sanding tawv zoo li no:

• rau kev ua haujlwm ntxhib tshaj plaws ntawm cov khoom siv emery hom P22, P24, P36 80-H, 63-H, 50-H;
• rau kev kho qhov ntxhib yooj yim, sib tsoo cim P40, P46, P60 40-H, 32-H, 25-H;
• txhawm rau ua tiav qhov kev sib tsoo ntawm qhov xav tau, ntawv yog sivQib Р80, Р90, Р100, Р120 20-Н, 16-Н, 12-Н, 10-Н;
• txhawm rau ua kom tiav cov khoom sib tsoo thiab muab nws zoo meej, koj yuav tsum siv cov ntawv xuab zeb P150, P180 8-H, 6-H.

Sanding paper size

Qhov loj ntawm daim ntawv xuab zeb yog txiav txim siab nyob ntawm nws qhov loj me. Emery nrog lub grain Performance index ntawm 50 muaj ib tug dav ntawm 720, 750, 800, 850, 900, 1000. Qhov ntsuas no yog ntsuas nyob rau hauv millimeters. Daim ntawv nrog xws li qhov dav thiab qhov loj me yog tsim nyob rau hauv yob 30 meters ntev. Nws yog ib qho tsim nyog sau cia tias nrog P50 thiab qhov dav ntawm 1250 hli, qhov ntev ntawm yob yog txo mus rau 20 meters. Rau cov ntawv xuab zeb, GOST 6456-82 txhais txhua qhov ntau thiab tsawg, kev tsim khoom thiab kev lees paub.

Production

Lub tshuab tsim khoom ntawm cov khoom no yog txoj kev siv cov abrasive rau hauv paus. Muaj ntau txoj hauv kev los ua qhov haujlwm no. Qhov no tuaj yeem yog ib qho kev siv tshuab ntawm daim ntawv thov lossis kev hloov pauv siv hluav taws xob. Txhua lub chaw tsim khoom ntawm cov ntawv xuab zeb xaiv txoj kev twg los siv cov abrasive. Nws tseem tsim nyog sau cia tias qhov kev xaiv ntawm kev sib txuas cov ntsiab lus tseem yuav yog qhov tseem ceeb hauv kev tsim khoom. Lawv tuaj yeem yog ntau hom lossis hom. Tsis tas li ntawd, lub zog thiab hom kev ua haujlwm ntawm daim tawv nqaij abrasive yuav nyob ntawm seb hom ntawv cog lus.