Koj paub ntau npaum li cas txog kev tso tus pins?

Koj paub ntau npaum li cas txog kev tso tus pins?
Dowel pins yog qhov tseem ceeb cylindrical alloy rods uas feem ntau yog siv rau kev sib txuas cov khoom hauv cov tshuab loj uas yuav tsum tau muaj cov khoom sib dhos. Txhawm rau kom cov khoom no ua haujlwm tau zoo, lawv cov qauv thiab lub zog yog qhov tseem ceeb. Qhov no yog vim li cas American Society of Mechanical Engineers tau tsim cov qauv tsim tshwj xeeb rau dowel pins raws li hauv qab no:
Cov khoom siv tau rau kev sib tw pins
Feem ntau, dowel pins yog ua los ntawm cov hlau alloy uas muaj me me ntawm cov sulfur thiab phosphorous, ntau dua {{0}}}.04 feem pua ​​thiab 0.05 feem pua. Txawm li cas los xij, vim tias cov pins tau siv hauv ntau qhov kev lag luam - suav nrog kev kho dej, kev tsim cov twj tso kua mis, kev tsim cov hlau, thiab kev tsim kho tsheb ciav hlau - lawv tuaj yeem siv rau lwm cov ntaub ntawv xws li tooj dag, 18-8 thiab 316 stainless hlau, txhuas, thiab titanium. .
tsim
Txawm hais tias siv cov hlau alloy, tus pin yuav tsum tau dhau los ntawm cov txheej txheem hardening hu ua austenitization. Cov txheej txheem no feem ntau yog siv los ntawm cov hlau-raws li hlau thiab txhais tau tias ua rau lawv kub siab heev, uas hloov cov qauv siv lead ua rau austenite (gamma-hlau).
Hardness factor
Cov nyhuv ntawm cov txheej txheem austenitizing yog kom ua tiav qee theem ntawm hardness ntawm sab hauv thiab sab nraud ntawm dowel. Hauv luv luv, raws li ASME cov qauv, lub dowel yog tsim kom zoo yog tias nws muaj lub plhaub hardness tsawg kawg yog 60 thiab ib tug tub ntxhais nrog ib tug hardness theem ntawm 47 thiab 58. Hardness feem ntau yog ntsuas ntawm Rockwell C scale, ib tug system siv los xam. lub indentation ntawm steel siv lub pointed pob zeb diamond cone. Lawm, harder steel alloys yuav muaj tsawg indentation tshaj softer steel alloys.
crown kawg specification
Lub crowned los yog rounded xaus ntawm dowels yog tau los ntawm tus txheej txheem hu ua chamfering, uas tshem tawm cov npoo ntse thiab flattens tag nrho nto kom lawv yooj yim mus ua hauj lwm nrog. Ntawm no, cov chaw tsim khoom yuav tsum xyuas kom meej tias qhov siab thiab lub vojvoog ntawm cov yas ua raws li ASME cov lus qhia. Piv txwv li, 1/8 "dub dowel yuav tsum muaj lub kaus mom qhov siab ntawm 0.041" thiab lub vojvoog yas ntawm 0.016".
Chamfer kawg ntsuas
Lub chamfered lossis beveled kawg ntawm lub dowel yuav tsum muaj lub kaum sab xis ntawm 4 thiab 16 degrees kom pom tau tias tsim nyog rau kev siv. Lub inclination feem ntau yog teev los ntawm qhov tsawg kawg nkaus thiab qhov siab tshaj plaws taw tes diameters. Nco ntsoov tias txij li cov dowels txawv ntawm qhov loj ntawm 1/8 "mus rau 1", qhov no txhais tau hais tias cov ntsiab lus saum toj no txawv.
Thaum xaiv dowels, koj yuav tsum tau them sai sai rau cov ntaub ntawv no, vim hais tias txoj kab uas hla ntawm lub qhov kawg thiab tus pin yuav tsum phim raws nraim. Yog tias cov pins me dhau, lawv yuav plam tawm ntawm qhov, thiab cov pins loj yuav tsis haum rau txhua qhov.