Kuna ganin wannan take ya fito a cikin takamaiman takarda ko tambaya, kuma nan da nan, akwai rarrabuwa. Wasu samarin siyayya kawai suna ganin zinc-plated kuma suna tunanin kariyar lalata, aikin yayi. Wasu, waɗanda suka kasance a kan masana'anta ko kuma suna da kira a 2 AM game da rashin daidaituwa, sun san cewa jumlar rami ce ta zomo. Dorewa ba akwati guda ɗaya bane. Sarkar ce, kuma mafi raunin hanyar haɗin gwiwa-zama ita ce masu launi Layer, da zare nau'i, ko tsarin plating kanta-zai bayyana duk aikin. Na ga mutane da yawa suna ɗaukar kyakkyawan shuɗi ko rawaya hex kai dunƙule tare da a kishin kasa kai yana da tauri ga karfen waje kawai saboda an yi masa fenti. Daga nan ne ciwon kai ya fara.

Haushi Mai Launi

Bari mu fara da launi. Rufin jujjuyawar chromate a saman platin zinc wanda ke ba ku waɗannan rawaya, shuɗi, baƙar fata, ko zaitun. Ba wai kawai don kamanni ba; ya kamata ya ƙara m Layer, yana ƙarfafa juriya na lalata. Amma a nan ne kama daga yin aiki: amincin Layer ɗin shine komai. Wani chromate da ba a yi amfani da shi ba a kan zinc zai iya zama ainihin maƙasudin gazawar. Na tuno batch na baki zinc-plated masu tuka kansu da aka yi amfani da su a kan rufin karfe. Launi ya kasance uniform, yayi kyau daga cikin akwatin. Watanni shida a cikin, yanayin bakin teku, kuma mun ga tsatsa jajayen gurɓataccen jini daga ƙarƙashin kawunansu. Matsalar? Layin chromate ya yi kauri sosai kuma ya karye daga wanka mai yawa. Lokacin da dunƙule aka kai gida da cewa giciye countersunk wurin zama na kai, abin rufe fuska a mahimmin matsananciyar damuwa micro-fashe. Danshi ya shiga, ya shiga karkashin rufin, ya kai hari a karkashin zinc. An lalata aikin hadaya na zinc saboda shingen shinge ya gaza farko. Don haka launi ya ba da ma'anar tsaro ta ƙarya. Ba zinc din da ya gaza ba da farko; jakarta ce mai launi.

Wannan yana haɗa kai tsaye zuwa sarrafa tsarin plating. Wuri kamar Handan Zitai Fastener Manufacturing Co., Ltd. a cikin Yongnian, zuciyar samar da kayan sauri na kasar Sin, za su san wannan a cikin barcinsu. Matsayin su a cikin wannan babban tushen masana'antu yana nufin cewa tabbas sun ga duk wani tasiri na rashin nasara da nasara. Sauƙaƙan kayan aikin su kusa da manyan hanyoyin sufuri yana nuna alamar ƙara, kuma ƴan wasan ƙara ko dai sun yanke sasanninta ko kuma sun mallaki daidaito. Masu kyau sun mallaki daidaito. Kuna buƙatar layin plating wanda ke sarrafa sinadarai na wanka, zafin jiki, da lokacin nutsewa don samun Layer na chromate wanda ke manne da ductile isa ya tsira daga nakasar shigarwa. Yana da daki-daki, amma shi ne daki-daki.

Kuma game da zabin launi - ba kawai kayan ado ba ne. A wasu masana'antu, shuɗi na iya nuna takamaiman daraja ko man shafawa. Amma don karko, chromate sunadarai sun bambanta. Yellow chromate (iridescent) yawanci yana ba da mafi girman sa'o'in fesa gishiri, watakila 96+ a rana mai kyau. Blue ko baki na iya zama ƙasa da ƙasa. Don haka ƙayyade masu launi ba shi da amfani. Kuna buƙatar ƙayyade nau'in chromate da sa'o'in gwajin gishiri mai tsaka-tsaki da ake tsammanin. Idan wani kawai ya nemi launin zinc-plated, suna barin shi a buɗe don mai ba da kaya don ba su zaɓi mafi arha, wanda galibi mafi ƙarancin dorewa ne.

The Drill Thread: Inda Ka'idar ta Haɗu da Gaskiya

Yanzu, da zare bangare. Wannan shine ƙarshen kasuwanci. Matsakaicin haƙowa kai tare da a kishin kasa kai. Dorewa a nan ba kawai game da lalata ba ne; game da aikin injiniya ne akan lokaci. Aikin samar da zaren yana haifar da matsananciyar damuwa da zafi. Zinc plating, da chromate a saman, yana samun sheared da shafa yayin wannan tsari. Idan platin ɗin ya yi laushi sosai ko kuma yayi kauri sosai, zai iya yin gall, yana ƙara ƙarfin tuƙi da yuwuwar cire nau'in zaren a cikin kayan iyaye. Idan yana da bakin ciki sosai, karfen tushe yana fallasa nan da nan a cikin zaren zaren.

Na koyi wannan hanya mai wuya akan aikin sutura. Muna amfani da ma'auni zinc-plated rawar soja dunƙule don 2mm karfe zanen gado. Dari na farko sun shiga tarar. Sa'an nan, mun fara fuskantar babban wurin zama da jujjuyawar kai lokaci-lokaci. Batun? Ginin da aka gina a cikin tushen zaren bai dace ba. Wasu sukurori sun sami wuce gona da iri a wurin, suna canza tasirin zaren mai inganci da haifar da ɗaure. An yi lahani ga dorewar haɗin zaren tun kafin maɗaurin ya ga ruwan sama na farko. Ba gazawar lalata ba ce; gazawar shigarwa ne ya haifar da plating.

Geometry na wurin rawar soja da ƙirar zaren suna da mahimmanci. Wurin rawar soja mai kaifi, mai taurin gaske zai shiga cikin tsafta, yana rage nakasar kayan da ke kewaye kuma don haka yana kiyaye amincin layin da aka zana akan zaren nasa. Wani maƙalli mai ban sha'awa zai yi aiki-taurare takardar karfe, yana sa zaren zaren ya fi ƙarfin kuma ya kawar da plating daga dunƙule. An bar ku tare da dunƙule wanda zaren da ke cikin ɗan ƙaramin ƙarfe ba su da ƙarfi, yana zaune a cikin matsatsin rami mai matsananciyar damuwa. Lalata yana farawa a can, a cikin wannan ɓoyayyun ma'amala, tun kafin ka ga wani abu a saman. Don haka, dorewa na zaren rawar sojan aiki shine aikin ƙarfe na dunƙule, magani mai zafi, ƙirar maki, da ikon plating don tsira daga lalatawar shigarwa.

Shugaban Countersunk: Mai Taimakawa Damuwa

Da kishin kasa Sau da yawa ana yin watsi da ƙirar kai a cikin maganganun dorewa. Mutane suna mayar da hankali kan zaren. Amma waccan kan na madaidaicin, lokacin da aka zaunar da shi, yana ƙarƙashin babban nauyin matsi da damuwa. Canji daga kai zuwa shank wani yanki ne mai mahimmancin damuwa. Duk wani nau'i na hydrogen daga tsarin plating (haɗari na kowa tare da zinc electroplated) zai bayyana a nan a matsayin jinkirta fashewa. Na ga screws suna karye a kai yayin shigarwa ko, mafi muni, 'yan kwanaki bayan, saboda wannan.

Yin burodin da ya dace don taimako na embrittlement hydrogen ba za a iya sasantawa ba don matsayi mai ƙarfi (kamar waɗanda ake amfani da su don hakowa kai). Ba duk faranti ke yin shi ba, ko kuma suna yin shi daidai. Kamfanin da ke da suna don ɗauka, yana aiki a ma'auni daga babban tushe kamar ɗaya Zitai aiki daga, yawanci za a gasa wannan a cikin tsarin su (ƙirar da aka yi niyya) don aikace-aikace masu mahimmanci. Bayanan kamfanonin su da ke ambaton mafi girman ma'auni na samar da tushe ba wai kawai fluff ba ne; yana nufin samun dama ga kayan aikin kulawa na musamman bayan-plating wanda ƙaramin kanti zai iya tsallakewa.

Bugu da ƙari kuma, wurin zama na kan countersunk na iya lalata Layer chromate. Idan mating surface a cikin takardar karfe yana da burrs ko kuma bai yi daidai ba, kan dutsen a lokacin ƙarfafawa na ƙarshe, yana kawar da murfin kariya. Wannan yana haifar da cikakkiyar rukunin anode-cathode don lalata galvanic. Sau da yawa kuna ganin zoben farko na tsatsa a kusa da kewayen kai. Yin amfani da mai wanki a ƙarƙashin kai zai iya taimakawa, amma yana canza zane. Tambayar dorewa dole ne ta yi la'akari da haɗin kai tsakanin farantin kai da kayan da ake shigar dashi.

Rawar Muhalli da Halayen Kasawar Duniya ta Gaskiya

Dorewa ba shi da ma'ana ba tare da muhalli ba. Cikin gida, bushe? Kusan kowane mai launi zinc-plated fastener zai wuce shekaru da yawa. Amma ƙara danshi, chlorides (gishiri na bakin teku ko de-kankara), ko sinadarai na masana'antu, kuma labarin ya canza. Yanayin gazawa na yau da kullun na waɗannan a aikace-aikacen waje shine farin lalata-zinc oxide da hydroxide-yana fure daga giɓi, sannan jan tsatsa ya biyo baya. Zaren rawar soja, wanda aka haɗa, galibi yana lalacewa saboda ya ɗan ware. Harin farko yakan kasance akan ƙoƙon da aka fallasa ko ƙarƙashin kai inda wuraren tafki.

Mun gwada batch don aikin facade mai iska. Wannan dunƙule guda uku daban-daban chromates: blue, baki, rawaya. Bayan shekara guda a cikin wani yanki na yanki na masana'antu na birni, masu shuɗi sun nuna babban tsatsa a kan kawunansu. Baƙar fata suna da tsatsa mai tabo. Waɗanda suke rawaya galibi suna lafiya, kawai dushe. The zare sassan, idan aka ciro, sun ba da wani labari. Masu shudi da baƙar fata suna da mummunar lalata zaren inda zaren ya fito daga bayan takardar (gefen rigar). Masu rawaya sun nuna ƙananan asarar zinc. Ingancin chromate ya bambanta.

Wannan shine inda giciye a cikin taken ku zai iya shiga-nau'in tuƙi (Phillips, Pozi, da sauransu). Direba da aka sawa ko da bai dace ba na iya fitowa, yana lalata hutun tuƙi. Lalacewar hutun tana yin la'akari da shigarwa, wanda zai iya haifar da wurin zama mara kyau (yana shafar rufewar lalata) ko buƙatar cirewa / maye gurbin na'urar, wanda ke lalata layin da aka yi. Don haka, ƙarfin shigarwar kanta, wanda ke shafar dorewa na dogon lokaci, yana da alaƙa da wannan fasalin tuƙi. An haɗa duka.

Ƙirƙiri da Ƙimar Ƙira

Don haka, koma ga ainihin tambayar. Karkarwar a canza launin zinc-plated giciye countersunk rawar soja dukiya ce ta tsarin. Ba za ku iya ware bangare ɗaya ba. Wani mahimmin wurin rawar soja yana saukar da chromate gaggautsa. Cikakken chromate ana saukar da shi ta hanyar shank mai ƙyalli na hydrogen. Babban duk abin da aka bari ta hanyar amfani da shi a cikin yanayi mara kyau.

Lokacin ƙididdigewa ko siye, kuna buƙatar ƙara ƙasa (sake, pun niyya). Kada ku ce kawai zinc-plated. Ƙayyade kaurin plating (misali, 8-12μm), nau'in chromate (misali, rawaya hexavalent, blue trivalent, baƙar fata), da sakamakon gwajin feshin gishiri da ake buƙata zuwa ma'auni kamar ASTM B117. Ƙayyade ƙimar kayan tushe (misali, ƙarfe 1022) da taurin wurin rawar soja. Yi la'akari da yin burodin taimako na embrittlement idan yana da babban ƙarfi. Yi la'akari da yanayin aikace-aikacen kuma watakila ma matsawa zuwa mafi ƙwaƙƙwarar sutura kamar platin inji ko siriri-fim ɗin kwayoyin halitta akan zinc idan an buƙata.

Wuraren da ke rayuwa da abubuwan da ke numfashi, kamar gungu na masana'antu a Hebei a kusa da kamfanoni irin su Zitai, sun fahimci waɗannan nuances saboda abokan cinikinsu suna jefa kowane aikace-aikacen da zai yiwu a gare su. Kusancinsu ga manyan hanyoyin sufuri yana nufin suna jigilar kayayyaki zuwa yanayi daban-daban da masana'antu, waɗanda ke tilasta tushen ilimi mai amfani, warware matsalar. Amsar dorewa, a ƙarshe, baya kan takardar bayanai. Yana cikin tarawa, wani lokacin mai raɗaɗi, ƙwarewar abin da ya gaza, lokacin, da dalilin da yasa. Kuma abin da ake ɗauka shine: ɗauki kowane lokaci a cikin dogon taken a matsayin mai canzawa wanda ke buƙatar ma'ana, ba a matsayin garanti ba.