Abrasive Grain Size: Feem ntau muaj feem xyuam rau qhov roughness thiab productivity. Rau kev sib tsoo ntxhib, nrog rau qhov nyiaj loj thiab qhov xav tau siab ntawm qhov roughness, coarser abrasive nplej yuav tsum tau xaiv. Qhov no yog vim cov nplej coarser muaj cov pores loj dua, tso cai rau kev sib tsoo ntau dua qhov tob thiab txo qhov yuav ua rau lub log clogging thiab overheating. Rau kev sib tsoo tiav, nrog rau qhov nyiaj me me thiab qis dua qhov yuav tsum tau ua, cov hmoov nplej zoo dua tuaj yeem xaiv. Feem ntau, finer abrasive grains ua rau zoo dua nto roughness.
Hardness thiab nws xaiv: Lub hardness ntawm lub sib tsoo log yog hais txog lub zog ntawm daim ntawv cog lus ntawm cov nplej abrasive thiab cov binder ntawm lub log nto. Lub log softer qhia tau hais tias cov nplej abrasive tau yooj yim tshem tawm, thaum lub log nyuaj qhia tau hais tias cov nplej abrasive nyuaj dua. Log hardness thiab abrasive grain hardness yog ob lub ntsiab lus sib txawv. Tib lub abrasive tuaj yeem siv los ua kev sib tsoo lub log nrog qhov sib txawv hardness, feem ntau txiav txim siab los ntawm cov khoom thiab qhov ntau ntawm cov ntawv khi thiab cov txheej txheem tsim lub log. Qhov sib txawv tseem ceeb ntawm kev sib tsoo thiab txiav yog qhov sib tsoo lub log muaj "tus kheej-sharpening" cov khoom. Xaiv lub hardness ntawm lub sib tsoo log yog qhov tseem ceeb xaiv nws tus kheej - ntse ntse; Lub hom phiaj yog los tiv thaiv cov nplej ntse ntse los ntawm kev poob ntxov dhau, tsis txhob cia lawv ua npub thiab ntse. Lub hauv paus ntsiab lus ntawm kev xaiv kev sib tsoo log hardness yog: thaum machining cov hlau mos, ib qho nyuaj sib tsoo log yog xaiv los tiv thaiv ntxov ntxov abrasive grain poob. Thaum machining cov hlau tawv, lub log sib tsoo yog xaiv los tso cai rau cov nplej uas tsis muaj pob zeb tawg sai sai, nthuav tawm cov nplej tshiab nrog cov npoo ntse (piv txwv li, tus kheej-sharpening). Cov qub yog vim cov khoom ua haujlwm abrasive hnav qeeb heev thaum sib tsoo cov ntaub ntawv mos, yuav tsum tau poob qis thaum ntxov; qhov tom kawg yog vim qhov ua haujlwm abrasive nplej hnav sai dua thaum sib tsoo cov ntaub ntawv nyuaj, yuav tsum tau hloov ntau zaus. Rau kev sib tsoo tiav, ib qho kev sib tsoo me ntsis yuav tsum tau xaiv los xyuas kom meej qhov sib tsoo thiab qhov roughness ntawm qhov chaw. Thaum cov khoom siv ua haujlwm tsis zoo thermal conductivity thiab ua rau kub hnyiab thiab tawg (xws li thaum sib tsoo cemented carbide), yuav tsum xaiv lub log sib tsoo softer.
Lub microstructure ntawm lub log sib tsoo yog hais txog qhov sib npaug ntawm qhov ntim ntawm cov nplej abrasive, tus neeg sawv cev sib txuas, thiab qhov pores uas ua rau lub log. Nws yog feem ntau muab qhab nia raws li qhov feem pua ntawm kev sib tsoo lub ntim ntim ntawm cov nplej abrasive. Sib tsoo log muaj peb lub microstructure xeev: ntom, nruab nrab, thiab xoob; subdivided rau hauv 15 qib ntawm 0 mus rau 14. Qhov me me ntawm microstructure naj npawb, qhov loj ntawm cov nplej abrasive, thiab cov denser lub sib tsoo log; Piv txwv li, qhov loj ntawm tus lej microstructure, qhov me me ntawm cov nplej abrasive, thiab lub looser lub log sib tsoo.
Puab, Qhov Loj, thiab Kev Xaiv Cov Sib Tsoo Sib Tsoo yog tsim los ntawm ntau cov duab thiab ntau thiab tsawg raws li cov cuab yeej siv tshuab thiab kev sib tsoo. Table 6 qhia ntau yam siv sib tsoo log, qhov ntau thiab tsawg, cov lej, thiab cov ntawv thov. Sab nraud txoj kab uas hla ntawm lub sib tsoo log yuav tsum tau xaiv kom loj li sai tau kom lub circumferential ceev, uas yog zoo rau kev txhim kho kev sib tsoo productivity thiab nto roughness. Tsis tas li ntawd, yog tias lub cuab yeej siv lub tshuab ua kom nruj thiab lub zog tso cai, siv lub log sib tsoo dav tuaj yeem txhim kho cov khoom tsim tau thiab txo qhov roughness. Txawm li cas los xij, thaum sib tsoo cov ntaub ntawv nrog lub siab kub siab, qhov dav ntawm lub log sib tsoo yuav tsum raug txo kom tsim nyog kom tsis txhob hlawv thiab tawg ntawm qhov chaw ua haujlwm.
