Paunotarisa kumotokari yako, ndege iri mudenga, kana kuti zvivako zvakakura zvakakupoteredza, unomboshamisika here nezverwendo runoshamisa rwakatorwa nezvikamu zviri mukati mezvivakwa izvi? Imwe nhanho yakakosha murwendo rwavo kushandurwa kubva kusimbi mbishi kuita zvikamu zvakasimba, zvakavimbika kuburikidza neunyanzvi hwekugadzira simbi. Iyi nzira yemazana emakore yakashanduka zvakanyanya nekufamba kwenguva, uye nhasi inoumba musana wemaindasitiri mazhinji. Joinha isu patinenge tichiongorora nyika ino inonakidza, tichiongorora maitiro, mabhenefiti, uye mashandisiro ekugadzira simbi.
Zvitsva Zvitsva
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Simbi yekugadzira inoshandura chimiro chezviyo chesimbi kuburikidza nekupisa uye kumanikidza kuburitsa zvinhu zvine simba repamusoro uye kuoma, uchishandisa hunyanzvi uye maitirwo akasiyana zvichienderana nezvaunoda uye kuoma.
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Nzira dzakasiyana-siyana dzekugadzira simbi dzinopa mabhenefiti akasiyana; kupisa kunopisa kunobvumira maumbirwo akaomarara ane akakwenenzverwa emuchina zvivakwa nekuda kwekuchinja kwechimiro chezviyo, nepo kutonhora kwekugadzira kunovandudza simba uye kusimba kuburikidza nekurebesa zviyo uye pancaking.
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Forged simbi zvakanakira zvinosanganisira kuwedzera simba uye durability, kunatsiridza michina zvivakwa, uye mutengo-kubudirira muhukuru-scale kugadzirwa; Kusarudza iyo chaiyo simbi alloy (kabhoni, Stainless, kana alloy simbi) yakakosha pakushanda kwakanyanya uye kuita.
Izvo zvakakosha zveSimbi Forging
Kugadzira simbi ibasa rinoshamisa, rakafanana nekuveza chiumbwa chakaisvonaka kubva padombo remabhura. Inosanganisira kushandiswa kwekupisa uye kudzvinyirira kune simbi, kugadzirisa chimiro chayo chezviyo uye kuchishandura kuva chikamu chesimba risingaenzaniswi, kuoma, uye kuvimbika. Iyi simbi yekuumba maitiro muenzaniso wekutanga wesimbi yekugadzira simbi, apo zvinhu zvakaumbwa uye zvakanatswa kuti zvisangane nezvinodiwa.
Rwendo rwechikamu chesimbi chinotanga nepurani yechimiro chayo chekupedzisira, kana chimiro chaunoda. Zvichitevera izvi, simbi inofamba nematanho anotevera:
1, Kupisa muforoji
2, Kuchekwa kwemabillet zvinoenderana nehukuru hwedhizaini
3, Kusarudzwa kwemaitiro ekuumba zvichienderana nekuoma uye kukura kwechikamu.
4, Maitiro acho anopedzisa nemaitiro ekupedzisa akadai sekuputika kwepfuti uye kugaya, izvo zvinoita kuti pave nekutsetseka, kwakajeka kwepamusoro kupera uye kunobatsira pakuenderana kwese kwesimbi.
Nhoroondo yeSimbi Forging
Unyanzvi hwekuumba simbi hwakatangira kuBronze Age apo bhuronzi nemhangura ndizvo zvaive simbi huru dzakagadzirwa. Nekufambira mberi mune tekinoroji, simbi yakatsiva bhuronzi nemhangura seyekutanga simbi yakagadzirwa.
Munguva dzazvino, kugadzira simbi kwasimuka kuita indasitiri yepasi rose, inofambiswa nehunyanzvi hutsva mumidziyo, marobhoti, magetsi ekudzora, uye otomatiki. Kufambira mberi uku kwakaunza shanduko muindasitiri, zvichiita kuti kugadzirwa kwemhando yepamusoro, dzakasiyana siyana dzesimbi muhukuru hwakasiyana, maumbirwo, zviwanikwa, uye kupera zvigoneke.
Kugadzira maindasitiri emazuva ano anoshandisa masimba emagetsi akadai semhepo yakamanikidzwa, magetsi, mahydraulics, uye chiutsi, chinosimbisa sando kana zvitsikirirwa zvinoshandiswa mukugadzira.
Basic Principles
Nheyo yemusimboti yekuforoma iri mukuumba simbi zvachose pasina kuitsemura, zvichikonzera kusimbaradza kwemaitiro uye hunhu hwakasiyana. Mukuita izvi, chiitiko chinonzi barreling chinogona kuitika nekuda kwekupokana pakati pebasa uye kufa kana punch. Iyo inokonzeresa kuti chidimbu chebasa chikwire pakati payo, zvichigona kukanganisa hukuru uye kuvimbika kwechikamu chakagadzirwa.
Kumira nedzvinyiriro huru uye tembiricha inosanganisirwa mukugadzira, iyo inofa inofanirwa kugadzirwa pachishandiswa zvinhu zvakaita seyakakwira-alloy kana simbi yemidziyo, iyo inoratidza kukanganisa uye kupfeka kuramba. Mafuta ekuzora anoshandiswa mukugadzira simbi kuti aderedze kukweshana uye kusakara, anoshanda sechivharo chekupisa, uye kuita semusanganiswa wekuparadzana kudzivirira chikamu kubva kunamira kune dzinofa.
Mhando dzeSimbi Forging Processes
Sezvinongoita muimbi anoshandisa matekiniki akasiyana kugadzira akasiyana zvidimbu zveunyanzvi, kuumba simbi kunosanganisirawo maitiro akasiyana-siyana kugadzira zvinhu zvakasiyana. Aya maitiro anosanganisira roll forging, open-die forging, uye impression-die forging. Forging mashandiro anogona zvakare kusiyaniswa zvichibva pane tembiricha yakashandiswa, senge inotonhora yekugadzira, inodziya yekugadzira, uye inopisa yekubikira. Mamwe tembiricha mazinga akakodzera kune chaiwo marudzi ekugadzira maitiro, uye imwe neimwe yeaya maitiro anotakura ayo akasiyana mabhenefiti uye mashandisiro.
Semuyenzaniso, roll forging inoshandiswa kugadzira masimbi anowanzo shandiswa muindasitiri yemotokari, ukuwo otomatiki inopisa forging inoshandura tembiricha yesimbi yekamuri kuita zvigadzirwa zvinopisa zvekubiridzira. Yakavharwa die forging molds kabhoni simbi pakati kufa halves kugadzira diki kana zvepakati zvinoriumba. Sarudzo pakati pekupisa uye kutonhora kwekugadzira inonyanya kuenderana nekudziya kwebillet. Mukupisa kunopisa, simbi inopisa kusvika kune yayo recrystallization tembiricha, nepo mukutonhora kwekugadzira, simbi inoremara pakudziya kwakaderera.
Hot Forging
Hot nokuchengetedza zvakafanana nekuumba ivhu. Mukupisa kwekugadzira, simbi inopisa kusvika kune yayo recrystallization tembiricha, ichiita kuti igadzikane. Matekiniki akadai sekurovera, kutsimbirira, kana kuumburudza anobva ashandiswa kugadzira simbi yakapfava kuita fomu inodiwa. Iyi nzira haingogadzirisi kusikwa kwezvimiro zvakaoma asiwo inowedzera mechanical properties yesimbi nekuda kwekuchinja kwezviyo zvayo.
Kupisa simbi kune tembiricha yayo yekristalllization, kazhinji iri pakati pe600-700 ° C, yakakosha sezvo ichiita kuti simbi iwedzere kupfava, zvichiita kuti zvive nyore deformation pasi pekumanikidza. Izvi zvinoguma nekugadzirwa kwezviyo zvitsva, pakupedzisira kusimbisa michina yesimbi. Nekudaro, manejimendi ane hunyanzvi ekudziya uye ekugadzira maitiro anodiwa kudzivirira kukanganisa kwesimbi.
Kwakatonhora
Kusiyana nekupisa kunopisa, chando chekuchengetedza inoumba simbi pakudziya kwakaderera. Zvakafanana nekushandura chivharo chakaoma cheaizi kuita chivezwa chechando chakanaka. Mukuita uku, iyo workpiece inomanikidzwa pakati pe punch uye kufa, ichiikanganisa mupurasitiki pasi pekumanikidza. Iyo inotonhora yekugadzira nzira inosanganisira nzira dzinoverengeka, dzinosanganisira:
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Extrusion
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Coining
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Kushungurudza
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Swaging
Zvakanakira kutonhora kwekugadzira zviri mukusimbiswa kwesimbi nekukanda nekurebesa zviyo, izvo zvinowedzera simba uye kusimba kwezvinhu.
Drop Forging
Fungidzira uchigadzira simbi sezvawaizoita ivhu nemhata inorema. Ndiko kudonhedza kukuitira. Mukuita uku, sando inoumba simbi kuti iite sedhifi. Iyi nzira yakakodzera kuumba akati wandei zvinhu, zvinosanganisira:
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simbi
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magnesium
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aruminiyamu
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Stainless simbi
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Brass
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mhangura
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alloys dzavo dzakasiyana
Kudonhedza forging kunogona kuiswa mumhando mbiri: yakavhurika-kufa forging uye yakavharwa-fa yekufovha. Rudzi rumwe norumwe runopa zvarwo zvakanakira uye runokodzera kune akasiyana maapplication. Iyo yekugadzira maitiro inosanganisira kugadzirira, kuumba mune yepakati inofa, uye kupedzisa workpiece. Dhizaini kona inobatanidzwa mufa kuti ifambise kuburitswa kwechikamu chakapedzwa.
Dhinda Forging
Press forging ndiyo imwe nzira inonakidza yekugadzira simbi. Mukuita uku, kuenderera kwemechanic kana hydraulic pressure inoshandiswa pakati pemaviri anofa. Iyo inoenderera inomanikidza inobvumira kunyatso kudzora pamusoro peiyo deformation maitiro uye inogona kuburitsa yunifomu mhedzisiro pane yese workpiece. Kuenzaniswa nematekiniki akaita senge kudonhedza-sando yekuumba, kugadzika kwekudhinda kwakasarudzika mukukanganisa iyo yese workpiece, ichipa inowirirana zvinhu zvivakwa uye yakanatswa microstructure.
Nekudaro, kubata tembiricha yebasa rekushanda kwakakosha kudzivirira hurema, sezvo kusangana kwakawanda neafi kunogona kuita kuti workpiece itonhore nekukurumidza.
Zvakanakira Steel Forging
Simbi yekugadzira inopa zviuru zvemabhenefiti, zvichiita kuti ive inofarirwa nzira yekugadzira mumaindasitiri akasiyana. Mabhenefiti ayo anotambanuka kubva kusimba rakawedzerwa uye kusimba kune yakagadziridzwa michina zvivakwa uye mutengo wakanaka mukugadzirwa kwakakura.
Simba uye Durability
Masimbi esimbi akaumbwa akasimba uye anogara kwenguva refu kupfuura anokandwa kana akagadzirwa. Izvi zvinodaro nekuti nzira yekuumba inoumba simbi muchimiro chayo chakasimba, kuenzanisa chimiro chayo chezviyo uye kuwedzera kuyerera kwezviyo. Idzi shanduko dzinowedzera kuneta kuramba, zvakanyanya kuvandudza simba rechikamu. Iyo yekuumba maitiro zvakare inobvisa mukati ma voids uye magasi homwe anogona kunetesa zvikamu zvesimbi, kuve nechokwadi chepamusoro chemakemikari kufanana uye kupa yakawedzera simba rechimiro.
Aya maitiro anoita kuti zvikamu zvesimbi zvakaumbwa zvive zvakanaka kune zvikamu zviri pasi pekunetseka kwakanyanya uye kumanikidzwa.
Yakavandudzwa Mechanical Properties
Imwe yemabhenefiti akakosha ekugadzira simbi ndeyekukwidziridzwa kwema mechanical properties yesimbi. Iyo inodzorwa deformation panguva yekugadzira nzira inonatsa chimiro chezviyo chesimbi, zvichitungamira kune yakagadziridzwa yezviyo kutaridzika uye kufanana. Izvi, zvakare, zvinoderedza kuvharika kwemukati uye kusvibiswa, zvichitungamira kune kushomeka kwezvinhu uye nekunatsiridza zvinhu zvese, sekuoma uye ductility.
Iyo yekuumba maitiro inopa akawanda mabhenefiti kusimbi, kusanganisira:
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Kuvandudza overheating resistance
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Enhanced abrasion resistance
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Kunonoka kuderedzwa kwekuoma kunokonzerwa nekuneta
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Kunzwika kwemetallurgical kukuru
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Yakavandudzwa kuoma
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Kuwedzera kunoshamisa kwesimba uye kuoma
Mutengo-Kubudirira
Simbi yekugadzira inomira pachena nekuda kwekudhura kwayo, kunyanya kana zvasvika pakugadzirwa kwakakura. Kugadzira kunoda kushoma zvinhu, kunoburitsa tsvina shoma, uye kunoda kushoma machining pane dzimwe nzira dzekugadzira, zvichikonzera kudzikiswa kwemitengo yese. Pamusoro pezvo, kuumbwa kwesimbi kunovimbisa kuwanikwa kwakanaka kwezvinhu zvinodiwa zvemuchina uye kugadzikana kwakagadziridzwa panguva yekupisa kupisa, zvichiita kuti mutengo uchengetedzeke munguva refu.
Pamusoro pezvo, kudyara kwekutanga kwekutanga mumidziyo yesimbi yekugadzira kunogona kuunza kudhura-kwenguva refu kuburikidza nekudzikiswa kwemitengo yezvinhu uye kuwanikwa kwepedyo-mambure maumbirwo.
Kusarudza iyo Right Simbi Alloy yeForging
Kusarudza alloy yesimbi yakakodzera yekugadzira inofananidzwa nekusarudza chishandiso chakakodzera chebasa. Sarudzo iyi inogona kukanganisa zvakanyanya kuita kwechigadzirwa chekupedzisira uye kushanda kwayo. Sarudzo dzinosanganisira kabhoni simbi, simbi isina tsvina, uye akasiyana alloy simbi, imwe neimwe iine yakasarudzika midziyo uye mashandisirwo.
Steel Carbon
Carbon simbi isarudzo ine zvakawanda-siyana uye inodhura-inoshanda pakugadzira. Inopa simba rakatanhamara, kuomarara, uye kuumbika, zvichiita kuti iumbwe pasi pekupisa nekumanikidzwa. Iyo kabhoni yemukati musimbi inogona kukanganisa zvakanyanya zvivakwa zvayo, ine yakakwira kabhoni yemukati inosimudzira kuoma uye kusimba, asi zvakare ichiwedzera brittleness uye kuderedza ductility uye weldability.
Zvisinei neizvi, kabhoni simbi inoramba iri sarudzo isingadhure yekuforoma nekuda kwemutengo wayo wakaderera wezvinhu zvichienzaniswa nemamwe masimbi ekugadzira, kunyanya simbi isina tsvina.
Simbi isina ngura
Simbi isina tsvina ndiyo imwe sarudzo yakakurumbira yekugadzira. Iyo inozivikanwa nekukwirira kwayo kwekuora, kusimba kwesimba, uye kugona kutsungirira kushushikana, zvichiita kuti ive sarudzo yakanaka yezvishandiso uko kusimba uye aesthetics kwakakosha. Kupokana kwakasarudzika kwesimbi isina tsvina kune ngura kunogona kuverengerwa nekuumbwa kwechidziviriro chromium oxide layer pamusoro payo kana yasangana nenharaunda.
Stainless simbi yakasarudzika zvivakwa zvakare inokonzeresa kuvandudzwa kwemichina senge kuoma uye ductility, zvichiita kuti ive sarudzo yepamusoro kune mamwe marudzi esimbi.
Chiwanikwa chiwanikwa
Alloy simbi inopa yakagadziridzwa zvivakwa senge kuomarara, ductility, uye kupfeka kuramba, zvichivaita sarudzo dzakakurumbira dzekugadzira. Simbi idzi dzine zvinhu zvakaita sechromium, nickel, molybdenum, uye vanadium, izvo zvinosimudzira mashandiro esimbi uye zvemuviri zvimiro zvesimbi, zvichikonzera kuwedzera kwesimba, kusaita ngura, uye kuoma.
Zvakare, masimbi alloy anofarirwa pamusoro pekabhoni uye simbi isina tsvina mukugadzira nekuda kwekupokana kwavo kwepamusoro kupfeka uye kubvarura uye kuwedzera weldability.
Makiyi Maindasitiri uye Mashandisirwo eForged Simbi
Simbi yakaumbwa ine huwandu hwakawanda hwemashandisirwo, huchapupu hwekusiyana kwayo uye kusimba kwayo. Inoshandiswa mumaindasitiri akasiyana, kusanganisira:
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Automotive sector
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Oiri negesi indasitiri
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Aerospace kugadzira
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kuvaka
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Heavy machines
Forged simbi zvikamu zvakakosha pakushanda kwemaindasitiri aya.
ZveMotokari Maindasitiri
Muindasitiri yemotokari, simbi yekunyepedzera ndiyo inosarudzika yezvikamu zvakawanda nekuda kwesimba rayo, kuoma, kuramba kupfeka, uye kuramba kuneta. Inoshandiswa kugadzira zvikamu zvakadai se:
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Zvemagetsi zvikamu
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Axle matanda
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Kuturika maoko
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Zvigadzirwa zvekutungamirira
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Crankshafts
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Axles
Kushandiswa kwesimbi yakaumbwa muzvikamu zvemotokari kunopa zvakanakira zvakanakira, kusanganisira:
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Zvishoma kana kusadiwa kwekugadzira
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Kuderera uremu pasina kukanganisa simba
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Kuwedzera kushanda kwemafuta
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Kuderedza kusvibiswa
Oiri neGesi Indasitiri
Indasitiri yeoiri negasi mumwe mushandisi mukuru wesimbi yakagadzirwa. Forged steel components anoshandiswa ku:
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Subsea zvikumbiro
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Mavharuvhu uye fittings
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Industrial hardware
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Mafuta anorema uye gasi midziyo
Kuumbwa kwakasimba kwesimbi yakagadzirwa, kuderedzwa kwayo kwepasi porosity, chimiro chezviyo chakatsetseka, kusimba kwepamusoro, uye kuvimbika kwakakwidziridzwa kunoita kuti ive yakanakira kumirisana nedzvinyiriro huru uye nharaunda dzinonetsa.
Uyezve, kushandisa zvinhu zvakaumbwa mukushanda kweoiri uye gasi kunowedzera kushanda zvakanaka nekudzikisa nguva yekudzikira uye mari yekugadzirisa.
Aerospace Manufacturing
Mukugadzira aerospace, kusimba uye kusimba kwezvikamu zvesimbi zvakaumbwa ndizvo zvakakosha. Izvi zvikamu zvinofanirwa kutsungirira kushushikana kwakanyanya uye kwakakosha kukanganisa, zvichiita kuti simbi yesimbi ive sarudzo yakanaka kune iyi indasitiri. Maitiro ekugadzira simbi anopa akawanda mabhenefiti, anosanganisira:
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Kuchenesa chimiro chezviyo chesimbi, zvichiita kuti kuve nekunatsiridza kutaridzika kwezviyo uye kufanana
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Kuderedza kuvharika kwemukati uye kusvibiswa, zvichikonzera kushomeka kwezvinhu
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Kuvandudza zvivakwa zvese, sekuoma uye ductility
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Aya mabhenefiti anoita kuti akaumbwa simbi avimbike zvakanyanya uye akakodzera kune inoda aerospace application.
Kuvaka uye Kurema Michina
Mumaindasitiri ekuvaka uye anorema emuchina, simbi yefodya inofarirwa nekugona kwayo kumira mitoro inorema uye kushushikana. Forged simbi zvikamu zvakabatanidzwa kune inorema kuvaka michina yakadai se:
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Vanochera
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Mabulldozers
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cranes
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Vatyairi vemirwi
Izvi zvikamu zvinoratidza simba repamusoro uye kusimba, kuderedza huremu hwese hwemuchina uye kuwedzera kushanda kwemafuta.
Kusarudza Simbi Forging Kambani
Kusarudza iyo yakakodzera simbi yekugadzira kambani kwakakosha sekusarudza simbi yakakodzera yeprojekiti yako. Zvinhu zvakawanda zvinopesvedzera sarudzo iyi, kusanganisira:
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Kuzvipira kwekambani kune mhando uye certification
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Mukurumbira wayo uye chiyero chebasa revatengi
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Nzira dzekutumira uye nguva dzekuchinja dzinopa
Hunhu uye Certification
Paunenge uchiongorora kambani yekugadzira simbi, chimwe chezvinhu zvekutanga kufunga nezvekuzvipira kwayo kune mhando. Ita shuwa kuti kambani inosangana nemhando yepamusoro uye inobata zvitupa zvakakodzera, senge ISO certification. Ichi chitupa chinoratidza kuti kambani ine yakasimba hunhu manejimendi system munzvimbo uye inoomerera kune dzakaomesesa kugadzirwa kwekutonga zviyero.
Iwe unogona kuona huchokwadi hwezvitupa zvekambani nekubata zvakananga chigayo uye nekuongorora iyo yakabikwa bvunzo mishumo uye magwaro ekuyedza.
Mabatiro evatengi uye Mukurumbira
Chimwe chinhu chakakosha chekufunga nezve mukurumbira wekambani uye mwero webasa revatengi rainopa. Kambani ine mukurumbira wakasimba ingangove yakavimbika uye ichipa nani chigadzirwa mhando. Yakasarudzika yevatengi sevhisi inotsanangurwa ne:
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Hupenyu hwechigadzirwa
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Mitengo inokwikwidza
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Chigadzirwa kuwanikwa
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kuvimbika
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Unyanzvi hwekubatana hunobudirira
Makambani akaita seMcKees Rocks Forgings, Inc. uye All Metals neForge Group anozivikanwa nebasa rawo rakasiyana nerevatengi.
Nguva dzekuchinja uye nzira dzekutumira
Pakupedzisira, funga nezvenguva yekuchinja kwekambani uye nzira dzekutumira. Izvi zvinhu zvinogona kukanganisa zvakanyanya kushanda kwese uye mutengo wepurojekiti yako. Kunzwisisa nguva yekuendesa yeodha yako, kubva pakuiswa kusvika pakupedzwa kana kuendesa, kwakakosha pakuronga kweprojekiti.
Zvinogara zvichikurudzirwa kukumbira ruzivo pamusoro pemaodha achangoburwa kuti uwane nzwisiso chaiyo yenguva dzekuchinja kwekambani.
pfupiso
Sezvataona, hunyanzvi hwekugadzira simbi hunoita basa rakakosha mumaindasitiri mazhinji, kubva kumotokari kuenda kumhepo. Iyo nzira inoshandura simbi mbishi kuita zvinhu zvakasimba, zvinovimbika, zvinopa simba risingaenzaniswi, kusimba, uye kuita mari. Kusarudza iyo chaiyo simbi alloy yekugadzira uye iyo chaiyo simbi yekugadzira kambani matanho akakosha mukuita. Nekunzwisisa kwakasimba kwesimbi yekugadzira, iwe unogona kuita sarudzo dzine ruzivo kumapurojekiti ako, kuve nechokwadi chekubudirira uye hupenyu hurefu.
Mibvunzo Inonyanya Kubvunzwa
Chii chinonzi kugadzira musimbi?
Kugadzira simbi inzira yekuumba simbi kuburikidza nekudzvanya, kudzvanya, kana kuumburudza, uchishandisa masimba ekumanikidza. Zvinosanganisira kutonhora, kudziya, uye kupisa kuumba, zvakakamurwa nekupisa kwesimbi iri kushandiswa.
Kuumba simbi kune simba kupfuura simbi here?
Hongu, simbi yekuumba inowanzosimba kudarika castings uye ndiro simbi nekuda kwekuyerera kwayo zviyo, zvichiita kuti zviome uye zvikwanise kubata zvirinani.
Chii chinoitika kusimbi kana yagadzirwa?
Kana simbi inogadzirwa, inoumba chimiro chezviyo chinofanotaurwa uye chakafanana, icho chinosimudzira simba rayo uye chinobvisa mukati mukati kana gasi homwe iyo inonetesa simbi, zvichikonzera kukwirira kwekemikari kufanana uye kuwedzera kwesimba rechimiro.
Sei carbon steel sarudzo inodhura yekugadzira?
Carbon simbi isarudzo inodhura yekuforoma nekuda kwemutengo wakaderera wezvinhu zvichienzaniswa nemamwe masimbi ekugadzira, inopa kusimba kwakawedzera, kuvimbika, uye simba. Izvi zvinoita kuti ive sarudzo inoshanda kune akasiyana maapplication.
Ndeapi mashandisirwo esimbi yakaumbwa muindasitiri yemotokari?
Simbi yakaumbwa inoshandiswa muindasitiri yemotokari kugadzira zvikamu zvakaita sematanda e-axle, maoko ekusimudzwa, zvidhiraivho, crankshafts, uye maaxles nekuda kwesimba rayo, kuoma, kuramba kupfeka, uye kuramba kuneta.