Kalasi 8.8 Black Oxide Hex Socket Head Cap Screws-Chidziwitso Chachidule cha Chitetezo cha Kuwonongeka ndi Kapangidwe ka Mutu 

2. Gulu la 8.8 Black Oxide Malizani: Kuteteza Kuwonongeka

2.1 Kodi Black oxide ndi chiyani?

Black oxide, yomwe imatchedwanso blackening, ndi zokutira zotembenuza mankhwala zomwe zimapangidwa pochita pamwamba pazitsulo zachitsulo ndi njira ya alkaline oxidizing pa kutentha kwakukulu (nthawi zambiri 140 mpaka 150 digiri Celsius). Mosiyana zokutira electroplated monga nthaka kapena Dacromet, amene amaika osiyana zitsulo wosanjikiza pamwamba pa gawo lapansi, okusayidi wakuda otembenuka topmost wosanjikiza zitsulo palokha magnetite (Fe3O4), khola wakuda chitsulo okusayidi. Zotsatira zake zimakhala zowonda, zakuda-zakuda zomwe zimakhala gawo lofunika kwambiri la fastener osati zowonjezera.

2.2 Njira ya Black oxide

Njira yokhazikika yakuda yakuda kwa zomangira za Giredi 8.8 imaphatikizapo magawo awa:

Kuyeretsa ndi kuyeretsa alkaline kuchotsa mafuta, madzi odulira, ndi zowononga m'masitolo.

Acid pickling kuchotsa pamwamba sikelo kapena kuwala dzimbiri.

Kumizidwa mu bafa yotentha ya alkaline-oxidizing (pafupifupi madigiri 141 Celsius), pomwe wosanjikiza wa maginito umapanga pakadutsa mphindi 10 mpaka 20.

Kutsuka ndi kusindikiza ndi mafuta oletsa dzimbiri kapena sera, zomwe zimawonjezera gawo la oxide ndi chotchinga cha hydrophobic.

2.3 Makhalidwe Olimbana ndi Corrosion

Payokha, wosanjikiza wakuda wa okusayidi ndi woonda (pafupifupi 0,5 mpaka 1.5 ma micrometer) ndi porous, zomwe zikutanthauza kuti amapereka kukana kwa dzimbiri pang'ono poyerekeza ndi plating ya zinc kapena galvanizing yotentha. Komabe, akaphatikizidwa ndi mafuta oletsa dzimbiri owonjezera kapena sera, zokutirazo zimakwaniritsa kusalowerera ndale kwa mchere kwa maola pafupifupi 24 mpaka 96, kutengera mtundu wa sealant. Mulingo wodzitchinjiriza uwu ndi wokwanira m'nyumba, molamulidwa ndi nyengo, kapena malo owononga pang'ono pomwe chomangira sichikhala pachinyezi kapena kupopera mchere kwa nthawi yayitali.

2.4 Ubwino ndi Zochepa

1. Zero dimensional kusintha: Chifukwa oxide wosanjikiza ndi pansi 2 micrometer wokhuthala, okusayidi wakuda sikusintha kulolerana ulusi. Zomangira za giredi 8.8 zimasunga kukwanira kwawo koyambirira kwa Class 6g, kupangitsa kuti zokutirako zikhale zoyenera pamisonkhano yolondola pomwe kusokoneza ulusi kuyenera kupewedwa.

2.Zopanda mtengo: Black oxide ndi imodzi mwamankhwala otsika mtengo kwambiri omwe amapezeka, otsika mtengo kwambiri kuposa plating ya zinc-nickel, Dacromet, kapena zitsulo zosapanga dzimbiri.

3. Palibe hydrogen embrittlement: Mosiyana ndi electroplating, njira yakuda ya oxide sipanga mpweya wa haidrojeni, ndikuchotsa chiwopsezo cha hydrogen embrittlement. Izi ndizofunikira kwambiri kwa ma fasteners a Giredi 8.8 omwe amagwira ntchito mopanikizika kwambiri.

4. Kukopa kokongola: Kutsirizira kwa yunifolomu ya matte-wakuda kumapereka maonekedwe oyera, akatswiri omwe amaphatikizana ndi magulu amtundu wakuda ndi kuchepetsa kuwala kowala.

5.Limitation - Kukana kwa dzimbiri kwakunja: Black oxide si yoyenera kunja, m'madzi, kapena malo owononga kwambiri. Pazinthu zoterezi, Dacromet, plating ya nickel ya zinc, kapena zitsulo zosapanga dzimbiri ziyenera kuganiziridwa.

3. Cylindrical Head yokhala ndi Hex Socket Drive

3.1 Kufotokozera mwachidule

Mutu wa cylindrical (omwe nthawi zambiri umatchedwa socket head cap screw head kapena DIN 912 / ISO 4762 mutu) umakhala ndi mawonekedwe athyathyathya pamwamba okhala ndi socket ya hexagonal pakati. Kutalika kwa mutu kumakhala pafupifupi nthawi 1.5 kutalika kwa ulusi, ndipo kutalika kwa mutu kumakhala pafupifupi 0.6 mpaka 1.0 kuchuluka kwa shank, kutengera kukula kwake. Geometry iyi imapereka malo akuluakulu onyamulira pansi pamutu pomwe imasunga mbiri yonse yokhazikika komanso yotsika.

3.2 Ubwino wa Cylindrical Head Design

High clamping mphamvu: Mutu wa cylindrical umapereka malo okulirapo kuposa ma countersunk kapena mabatani amutu, kugawa katundu wotsekera pamalo okulirapo ndikuchepetsa chiwopsezo cha indentation kapena kuwonongeka kwa chogwirira ntchito.

Pansi Pansi: Chifukwa mutu umakhala pamwamba pamtunda m'malo mosunthika, mutu wa cylindrical umangofunika bowo losavuta kapena bowo. Palibe ntchito yotsutsa yomwe ikufunika, kufewetsa kupanga.

Kuyika kosunthika kapena kokwezeka: Mutu ukhoza kuyikidwa monyezimira ndi pamwamba (ngati ntchitoyo ilola mutu wokwezeka) kapena kuyikanso pa counterbore kuti imalizike bwino, ndikupangitsa kusinthasintha kwamapangidwe.

Maonekedwe aukhondo: Mutu wosalala wa cylindrical umapereka mawonekedwe owoneka bwino, ofananirako omwe amawakonda kwambiri pamakina, zida, ndi zamagetsi zamagetsi.

3.3 Hex Socket Drive Benefits

The hexagonal socket (Allen) drive ndiye mawonekedwe ofotokozera a socket head cap screw. Kiyi ya Allen hex (wrench) imalowetsa chopumira cha mfundo zisanu ndi chimodzi, ndikutumiza torque kuti iyendetse screw. Dongosolo loyendetsa ili limapereka maubwino angapo osiyana pa hex yakunja, Phillips, kapena ma drive a slotted:

Kutumiza kwa torque yapamwamba: Soketi ya hex yamkati imatha kupirira ma torque okwera kwambiri kuposa ma Phillips kapena ma drive otsekeka, ndikupangitsa kulimba kodalirika kumitengo yayikulu yojambulira yomwe imafunikira pazomangira za Giredi 8.8 (mpaka 80% ya katundu wotsimikizira pamalumikizidwe ovuta).

Kukana kwa Cam-out: Mosiyana ndi ma drive a Phillips omwe amapangidwa kuti azituluka (kusiya) pansi pa torque yayikulu, socket ya hex imasunga chiwopsezo chonse, kuchepetsa chiwopsezo cha kutsetsereka kwa zida ndi kuwonongeka kwa mutu.

Kufikira pamunsi: Kiyi ya hex imayandikira kuchokera pamwamba (njira ya axial), kulola kuyika m'malo otsekeka pomwe wrench sangathe kufika kumbali. Izi ndizofunikira makamaka pamakina odzaza makina.

Chiwopsezo chochepetsera kuvula: Malo akulu olumikizirana pakati pa kiyi ya hex ndi makoma a socket amagawa kupsinjika mofanana, kuchepetsa mwayi wa socket deformation kapena kuvula, ngakhale mutakhazikitsa mobwerezabwereza ndikuchotsa.

4. Zomwe Zimagwira Ntchito

Grade 8.8 black oxide hex socket socket head cap screws amagwiritsidwa ntchito m'mafakitale osiyanasiyana komwe kumafunikira mphamvu zapakatikati, kuteteza dzimbiri m'nyumba, ndi mwayi wolumikizana ndi kompositi.

Kupanga makina ndi zida: Zoyikira injini, nyumba zama gearbox, zomangira pampu, ndi kulumikizana ndi chimango.

Zagalimoto (zigawo zamkati ndi zosawoneka): Zophatikiza padashboard, mafelemu a mipando, mabulaketi amkati, ndi zida zamkati zotetezedwa ku nyengo yachindunji.

Zida ndi zida: Maziko a nkhungu, ma jig ndi fixture assemblies, ndi ma difa pomwe kumenyetsa kolondola ndi kumasula mobwerezabwereza kumakhala kofala.

Zamagetsi ndi m'malinga: Zipangizo zokhala ndi ma rack, mabokosi ophatikizira magetsi, ndi ma control panel omwe amasankha mtundu wakuda wakuda ndi mutu wocheperako.

Mipando ndi zida zomanga: Zolumikizira mipando yofananira, malo owonetsera, ndi zomangira zamkati.

5. Mapeto

Grade 8.8 black oxide hex socket socket cap zomangira zimayimira njira yolumikizira bwino yomwe imakwaniritsa zofunikira ziwiri zauinjiniya nthawi imodzi. Kutsirizira kwa okusayidi wakuda kumapereka chotchinga chowonda, chokhazikika, chopanda hydrogen-embrittlement-free corrosion chotchinga chomwe chimakhala chopanda ndalama komanso chowoneka bwino. Ngakhale kukana kwake kwa dzimbiri kumakhala kochepa poyerekeza ndi zokutira zamtengo wapatali monga Dacromet kapena zinc-nickel, ndizokwanira m'malo amkati komanso owononga pang'ono. Mutu wa cylindrical wokhala ndi hex socket drive, pakadali pano, umapereka kutumiza kwamphamvu kwambiri kwa torque, kuthekera koyika kophatikizana, komanso kukongola koyera komwe kumapangitsa kukhala chisankho chokondedwa pamisonkhano yamakina pomwe malo, kudalirika, ndi mawonekedwe ndizofunika. Pamodzi, zinthu ziwirizi zimapangitsa kalasi ya 8.8 ya black oxide socket socket cap kuti ikhale yosunthika, yotsika mtengo, komanso yodalirika pakugwiritsa ntchito mafakitale osiyanasiyana.