Colored zinc-plated cross countersunk drill thread durability? 

Iwe unoona iyi zita richibuda mune yakatarwa pepa kana mubvunzo, uye nekukasira, pane kupatsanurwa. Vamwe vakomana vekutenga vanongoona zinc-plated vofunga kudzivirira corrosion, basa raitwa. Vamwe, avo vanga vari pasi pefekitori kana kufona na2 AM nezve chigadziriso chakatadza, vanoziva kuti mutsara igomba rose retsuro. Kusimba hakusi bhokisi rimwe chete rekutarisa. Iyo ketani, uye iyo isina kusimba chinongedzo - ingave iyo colored layer, iyo Drill tambo fomu, kana kuti plating process pachayo-inotsanangura kuita kwese. Ndakaona vazhinji vachifunga bhuruu kana yero hex musoro screw ine a countersunk musoro wakasimba zvakakwana kune yekunze sheet simbi nekuda kwekuti yakaputirwa. Ndipo panotangira misoro.

Iyo Illusion yeColour Layer

Ngatitange nemuvara. Iyo chromate conversion coating pamusoro pe zinc plating iyo inokupa iyo yero, bhuruu, matema, kana maorivhi. Haisi yezvitarisiko chete; inofanirwa kuwedzera passive layer, inosimudzira kusaita ngura. Asi heino kubata kubva pakuita: iyo kutendeka kweiyo layer ndiyo zvese. Chromate isina kushandiswa zvakanaka pamusoro pe zinc inogona kunge iri iyo yekukundikana. Ndinoyeuka batch yeblack zinc-plated ma-self-drillers anoshandiswa pane canopy yesimbi. Rudzi rwaive yunifomu, raitaridzika zvakanaka kunze kwebhokisi. Mwedzi mitanhatu mugungwa, takaona ngura yakatsvuka ichibuda muzasi memisoro. Dambudziko? Iyo chromate layer yaive yakakora zvakanyanya uye isina brittle kubva mukugezesa kwakanyanya. Apo screw yakadzingwa kumba nayo cross countersunk chigaro chemusoro, iyo yekupfeka pa-high-stress points micro-cracked. Hunyoro hwakapinda, hukapinda pasi pejasi, ndokurwisa zinc yaiva pasi. Chibairo chezinc chakakanganisika nekuti chivhariso chakatadza kutanga. Saka vara racho rakapa pfungwa yenhema yekuchengeteka. Yakanga isiri zinc yakakundikana pakutanga; raiva bhachi rayo rine ruvara.

Izvi zvinosungirirana zvakananga kune plating process control. Nzvimbo yakaita seHandan Zitai Fastener Manufacturing Co., Ltd. kunze muYongnian, moyo wekugadzirwa kweChina chinomhanyisa, vaizoziva izvi mukurara. Nzvimbo yavo mune iyo yakakura maindasitiri base inoreva kuti vangangoona pese pese mvumo yekutadza kugadzira uye kubudirira. Iko kurerukirwa kwemidziyo yavo padhuze nemigwagwa mikuru yekufambisa inoratidza huwandu, uye vhoriyamu vatambi vangave vakacheka makona kana master kuenderana. Vakanaka vanokwanisa kuwirirana. Iwe unoda mutsara weplating unobata chemistry yekugezesa, tembiricha, uye nguva yekunyudzwa kuti utore chromate layer inonamatira uye ductile zvakakwana kuti urarame yekumisikidza deformation. Ihwo hutsananguro, asi ihwo ruzivo.

Uye nezve kusarudzwa kwemavara-haisi kungoyevedza. Mune mamwe maindasitiri, bhuruu inogona kuratidza giredhi chairo kana mafuta. Asi nekuda kwekusimba, iyo chromate chemistry inosiyana. Yero chromate (iridescent) inowanzopa yakanyanya kupfapfaidza munyu maawa, pamwe 96+ pazuva rakanaka. Bhuruu kana dema zvingave zvishoma. Saka kudoma colored hazvibatsiri. Iwe unofanirwa kutsanangura rudzi rwechromate uye inotarisirwa kusarerekera munyu yekupfapfaidza maawa ekuyedza. Kana mumwe munhu achingokumbira zinc-yemavara-yakapfava, ivo vari kuisiya yakavhurika kuti mutengesi avape iyo yakachipa sarudzo, iyo inowanzo diki.

Iyo Drill Thread: Apo Dzidziso Inosangana Nechokwadi

Zvino, the Drill tambo chikamu. Uku ndiko kupera kwebhizinesi. A self-drilling screw ine a countersunk musoro. Kugara kwenguva refu pano hakusi kwekuora chete; ndezvekuita kwemakanika nekufamba kwenguva. Iyo tambo-yekugadzira chiito inogadzira yakakura kushushikana kwenzvimbo uye kupisa. Iyo zinc plating, uye chromate kumusoro, inogerwa uye kuzorwa panguva iyi. Kana plating yacho yakapfava kana kukora zvakanyanya, inogona nduru, ichiwedzera dhiraivha torque uye zvichikwanisa kubvisa fomu reshinda muzvinhu zvemubereki. Kana yakanyanya kutetepa, simbi yepasi inoburitswa pakarepo mushinda.

Ndakadzidza izvi nenzira yakaoma pabasa rekupfeka. Takanga tichishandisa mwero zinc-plated drill screw ye 2mm simbi mapepa. Zana rekutanga rakapinda zvakanaka. Zvadaro, takatanga kusangana nepamusoro pekugara torque uye dzimwe nguva musoro kutenderera. Nyaya yacho? Kuvakwa kweplating mumudzi weshinda kwaisaenderana. Mamwe masiruuru aive nekunyungudika ipapo, achichinja shinda yeshinda uye kukonzera kusunga. Kusimba kwekubatanidzwa kweshinda kwakakanganiswa screw isati yatomboona mvura yayo yekutanga. Kwakanga kusiri kukundikana kwekuora; kwaive kutadza kugadzwa kwakakonzerwa neplating.

Iyo geometry yenzvimbo yekuchera uye dhizaini yeshinda yakakosha. Iyo yakapinza, yakanyatso kuomeswa yekuboora inopinda zvakachena, ichideredza deformation yezvakatenderedza uye nekudaro kuchengetedza kutendeseka kweiyo yakapfava layer pashinda dzescrew pachayo. Nzvimbo yakagomara inozoshanda-kuomesa simbi, ichiita kuti tambo iwedzere kuomesa uye kubvisa plating kubva pasiruu. Iwe wasara nescrew ine tambo dzine simbi isina chidimbu, yakagara mugomba rakasimba, rakasimbiswa. Corrosion inotanga ipapo, mune iyo yakavanzika interface, kare usati waona chero chinhu pamusoro. Saka, kusimba kwetambo yekubooresa ibasa resimbi yescrew, kurapwa kwekupisa, dhizaini yemapoinzi, uye kugona kweplating kupona kuisirwa abrasion.

The Countersunk Head: A Stress Concentrator

The the countersunk dhizaini yemusoro inowanzoregererwa muhurukuro dzekugara. Vanhu vanotarisa pashinda. Asi musoro iwoyo wakabatana, kana wakagara wakapfava, uri pasi pemutoro wakakura wekusungirira uye kushushikana. Shanduko kubva kumusoro kuenda kune shank inzvimbo yakaoma yekushushikana. Chero hydrogen embrittlement kubva muplating process (njodzi yakajairika ine electroplated zinc) icharatidza pano sekunonoka kutsemuka. Ndakaona screws kuputika mumusoro panguva yekuisa kana, zvakanyanya, mazuva mashoma mushure, nekuda kweizvi.

Kubika kwakakodzera kwehydrogen embrittlement relief hakugone kutaurirana kune epamusoro-simba mamakisi (seaya anoshandiswa pakuzviboora). Haasi ese ma plater anozviita, kana kuzviita zvakakwana. Kambani ine mukurumbira wekusimudzira, ichishanda pamwero kubva pahwaro hombe senge Zitai Forteners inoshanda kubva, ingangoita kuti izvi zvibikwe mukuita kwavo (pun yakanangana) yezvikumbiro zvakakosha. Mbiri yavo yekambani inotaura yakakura yakajairwa chikamu chekugadzira base haingori fluff; zvinoreva kuwana kune yakasarudzika post-plating kurapwa zvivakwa izvo chitoro chidiki chinogona kusvetuka.

Uyezve, kugara kweiyo countersunk musoro kunogona kukuvadza chromate layer. Kana nzvimbo yekubatanidza mushizha resimbi ine burrs kana kuti isina kunyatsoti sandara, musoro unozununguka panguva yekuomesa kwekupedzisira, uchikwenya kubva pakudzivirira. Izvi zvinogadzira yakakwana anode-cathode saiti yegalvanic corrosion. Iwe unowanzoona mhete yekutanga ye ngura yakatenderedza musoro weperimeter. Kushandisa washer pasi pemusoro kunogona kubatsira, asi inoshandura dhizaini. Mubvunzo wekusimba unofanirwa kufunga nezvekubatana pakati pemusoro wakaputirwa uye zvinhu zvauri kuendeswa mukati.

Yekudhanha Kwenzvimbo uye Chaiyo-Nyika Kukundikana Modes

Kugara hakuna zvakunoreva pasina nharaunda. Indoor, yakaoma? Zvinenge chero Colored zinc-yakarongedzwa fastener ichagara makumi emakore. Asi wedzera hunyoro, ma chlorides (coastal or de-icing salts), kana makemikari emuindasitiri, uye nyaya inoshanduka. Iyo yemhando yekutadza maitiro eiyi mune yekunze maapplication ndeye chena corrosion - zinc oxide uye hydroxide - inotumbuka kubva mumigero, ichiteverwa netsvuku ngura. Iyo tambo yekubooresa, ichimisikidzwa, kazhinji inoshatisa kwekupedzisira nekuti inenge yakasarudzika. Kurwiswa kwekutanga kunowanzova pane shank yakazaruka kana pasi pemusoro pane dziva dze condensation.

Takaedza batch yeprojekti inofefetera facade. Same screw, matatu akasiyana chromates: bhuruu, dema, yero. Mushure megore mune semi-industrial nharaunda yemudhorobha, iwo ebhuruu airatidza yakakosha ngura chena pamisoro. Idzo nhema dzakanga dzine ngura dzine mavara. Iwo mayellow aive akanyanya kunaka, akagomara. The Drill tambo zvikamu, pazvakabudiswa, zvaitaura imwe nyaya. Iwo eblue neblack aive aine shinda yakaoma kuita ngura apo shinda yaibuda nekuseri kwebepa (divi rakanyorova). Iwo eyero aingoratidza kushomeka zinc kurasikirwa. Hunhu hwechromate hwaive hwekusiyanisa.

Apa ndipo panogona kupinda muchinjiko wezita rako — rudzi rwekutyaira (Phillips, Pozi, nezvimwewo). Yakasakara kana kukanganiswa mutyairi bhiti inogona kubuda, ichikuvadza drive recess. Iyo yakakuvadzwa recess inokanganisa kugadzika, izvo zvinogona kutungamira kune zvisina kufanira zvigaro (zvichikanganisa corrosion sealing) kana kudiwa kwekubvisa / kutsiva chisungo, icho chinoparadza yakapfava layer. Saka, kusimba kwekuiswa kwayo pachayo, iyo inokanganisa kusimba kwenguva refu, yakasungirirwa kune iyo drive ficha. Zvose zvakabatana.

Synthesis uye Pragmatic Kutsanangura

Saka, kudzokera kumubvunzo wekutanga. Kusimba kwe a Colored zinc-yakatemwa mucherechedzo muchivanhu kuderera kudhiraivha tambo is a system property. Iwe haugone kutsaura chikamu chimwe chete. Iyo inonakidza drill point inodzikiswa nebrittle chromate. Chromate yakakwana inodzikiswa nehydrogen-embrittled shank. Zvikuru zvese zvinoregedzwa nekushandiswa munzvimbo isiriyo.

Paunenge uchitsanangura kana kutenga, unofanirwa kudonhedza pasi (zvakare, pun yakarongwa). Usangotaura zinc-plated. Taura ukobvu hweplating (semuenzaniso, 8-12μm), rudzi rwechromate (semuenzaniso, hexavalent yero, trivalent yebhuruu, dema), uye inodiwa munyu wekupfapfaidza mhedzisiro yechiyero seASTM B117. Taura giredhi yegiredhi yezvinhu (semuenzaniso, simbi 1022) uye kuomarara kwechibhorani. Taurai hydrogen embrittlement yekuyamura kubika kana iri giredhi resimba repamusoro. Funga nezvemamiriro ekushandisa uye pamwe kutokwira kumusoro kune yakawedzera kusimba senge mekiniki plating kana nhete-firimu organic coating pamusoro pe zinc kana zvichidikanwa.

Nzvimbo dzinogara uye dzinofema zvisungo, senge masumbu eindasitiri muHebei akatenderedza makambani akadai saZitai, vanonzwisisa aya nuances nekuti vatengi vavo vanokanda zvese zvavanogona kushandisa pavari. Kusvika kwavo kune makuru ekufambisa zvinongedzo zvinoreva kuti vari kutakura kune akasiyana mamiriro ekunze nemaindasitiri, izvo zvinomanikidza ruzivo runoshanda, kugadzirisa matambudziko. Mhinduro yekusimba, pakupedzisira, haisi papepa re data. Zviri mune zvakaunganidzwa, dzimwe nguva zvinorwadza, ruzivo rwezvinokundikana, rini, uye nei. Uye chekutora ndeichi: bata temu yega yega mune iro zita rakareba seshanduko inoda kutsanangura, kwete sevimbiso.