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Mupi wezvishandiso zvekuvaka kwemakore makumi matatu.
Mutauro
Mupi wezvishandiso zvekuvaka kwemakore makumi matatu.
Kuziva kucheka simbi zvakachengeteka hakusi kungokurumidza kupinza simbi. Panzvimbo yekuvaka ine vanhu vakawanda, kucheka kwega kwega kunokanganisa kuti kusimbisa kunogona kuiswa zvakanaka sei, kusungwa, kukotama, kufambiswa uye kuongororwa zvakanaka kongiri isati yadururwa. Mabhawa mapfupi mashoma anogona kushandiswa nezvishandiso zvemazuva ano, asi kucheka kwakaitwa kakawanda kwemaslab, matanda, mabhiriji, matuneri kana macage akagadziriswa kare kunoda nzira yakadzorwa zvakanyanya. mucheki we rebar inobatsira mushandi kucheka simbi asinganyanyi kushandisa maspark, ma disc abrasive uye simba remaoko, ukuwo zvichiita kuti maitiro acho arambe achidzokororwa kubva kune mumwe mushandi kuenda kune mumwe. Idzi inhau dzakanaka dzekubudirira, uye dziri nani kune munhu asingachafaniri kurwisa simbi masikati ese.
Chikanganiso chekutanga pakucheka rebar ndechekufunga kuti dhayamita yacho inotaura nyaya yese. Hazvidaro. Kuyera kwesimbi kunochinja simba rinodiwa pakucheka bar, saka mucheki anofanira kusarudzwa zvichienderana nehukuru hwebar uye simba rechinhu chacho. Sekureva kwazvinoita, dhayamita yacho inoratidza nyaya yese. ASTM A615/A615M , masimbi ekusimbisa anogona kuva nesimba rekugadzira re40,000 psi, 60,000 psi, 80,000 psi uye 100,000 psi . Giredhi 60 rebar, imwe yemagiredhi akajairika anoshandiswa pakugadzira kongiri yakasimbiswa, ine simba rekugadzira re60,000 psi, kana 420 MPa . Ndosaka kugona kwemuchina kuchifanira kuongororwa zvichienderana nesimbi chaiyo, kwete kungofungidzira kubva padhayamita yebhara chete.
Masisitimu ehukuru hwebhawa anogonawo kukonzera kuvhiringidzika kana vatengi vachienzanisa michina mumisika yakasiyana. MuUS bar numbering system, nhamba yacho inowanzo miririra masere e inchi, saka #4 rebar ine dhayamita ye0.500 inch , #5 i0.625 inch uye #8 i1.000 inch . Kune vanogadzira makontrakita, vatengesi nemakambani ekurenda, izvi zvinokosha nekuti muchina wekucheka bhaa resimbi inofanira kuenderana nehurongwa hwekusimbisa hunoshandiswa pamapurojekiti chaiwo, kwete hukuru hwakakura hwakadhindwa mubhurocha chete. Kana nzvimbo yacho ichishandisa saizi dzakasiyana dzemabhawa panheyo, makoramu, madhiriji uye macage akagadziriswa kare, mucheki anofanira kusarudzwa pabasa iroro rakasanganiswa.
Muchina wekugaya makona unogona kucheka rebar kana wakaiswa dhisiki rekucheka resimbi rakakodzera, uye unobatsira pakucheka dzimwe nguva, kugadzirisa uye kugadzirisa diki panzvimbo yacho. Chinhu chakanaka ndechekuti unogadzira sparks, guruva, kupisa uye ruzha, uye mhedzisiro yacho inoenderana zvakanyanya nekudzora kwemushandisi. Mamiriro evhiri, kona yekucheka uye nzvimbo yekudzivirira zvese zvinokosha. OSHA 1926.303 inoti, kana paine maguard evhiri abrasive anodiwa, kuratidzwa kwakanyanya kwekona kwemativi evhiri rekukuya nemativi hakufanirwe kudarika 180° . Mumutauro uri nyore: guard haisi yekushongedza. Iripo nekuti mavhiri abrasive akatyoka haawire pasi zvine hunhu.
Muchina wekucheka bhoti uri nyore, wakanyarara uye unotakurika. Haudi magetsi uye hauburitse sparks, izvo zvinogona kubatsira munzvimbo dzakamanikana. Zvisinei, unonyanya kushanda pamatanda madiki edhayamita uye kugadzirisa nzvimbo yakareruka. Sezvo dhayamita yematanda kana simbi ichiwedzera, mushandisi anofanira kushandisa simba rakawanda, uye magumo ekucheka anogona kukanganisa kana muchina wekucheka usina kukodzera chinhu chacho. Kune matanda mashoma emwenje, unogona kushanda. Pakugadzirisa simba rezuva nezuva, unokurumidza kuva chirongwa chekurovedza muviri chisina kukumbira.
An muchina wekucheka mabhawa emagetsi kana hydraulic rebar cutter inowanzova sarudzo iri nani kana basa racho riine kucheka kwakadzokororwa, huwandu hwakawanda kana kudzora kwakasimba kwekuchengetedza. Bhawa iri rakaiswa pakamira, rakatsigirwa zvakanaka uye rakachekwa neblade system yakagadzirirwa simbi yekusimbisa. Izvi zvinoita kuti kucheka kuve kwakasimba uye zvinoita kuti mhedzisiro isanyanya kutsamira pakusimba kwemushandisi wega wega. Kune vanogadzirisa simbi, mafekitori akagadziriswa kare, makontrakita emabhiriji, nzvimbo dzekuvaka uye zvikepe zvekurenda, kudzokorora uku kunowanzo kukosha kupfuura kumhanya chete. Kucheka nekukurumidza kunobatsira; kucheka nekukurumidza uye kwakafanana ndiko kunoita kuti kutengeserana kunotevera kuenderere mberi.
Kuenzanisa pakati pemuchina wekucheka simbi ne angle grinder hakufanirwe kuderedzwa kusvika pakuti "ndechipi chishandiso chinogona kucheka simbi?" Zvese zvinogona kuita basa racho, asi zvinogadzirisa matambudziko akasiyana. Muchina wekucheka simbi unochinjika uye haudhuri pakucheka dzimwe nguva, nepo muchina wekucheka simbi wakasimba pakucheka simbi dzakatwasuka. Kana matanda akawanda kana mazana esimbi achifanira kuchekwa kusvika pakureba, muchina wekucheka simbi unowanzopa kutonga kuri nani, kuderedza kuneta kwemushandisi uye kushanda kwakachena nekuti kufamba kwekucheka kwacho kwakasimba pane kutungamirirwa nemaoko.
Ruzha runofanirawo kufungwa nezvarwo usati wasarudza nzira yekucheka nayo. Ruzha rwekuvaka rweOSHA inoda dziviriro kana huwandu hweruzha hwapfuura miganhu iri muTafura D-2, kusanganisira 90 dBA kwemaawa masere , 95 dBA kwemaawa mana uye 100 dBA kwemaawa maviri . Kune maworkshops uye mayadhi akagadziriswa kare, Mutemo weOSHA weruzha rweindasitiri inoshandisawo avhareji ye85 dBA yemaawa masere yenguva inoyerwa sechikamu chezviito zvechirongwa chekuchengetedza kunzwa. Mukutaura kunoshanda, kana nzvimbo yekucheka ikanyanya kurira, nguva shoma iyo vashandi vanogona kupedza ipapo zvakachengeteka vasina dziviriro chaiyo yekunzwa uye kuronga ruzha.
| Tarisa Chinhu | Nei Zvichikosha | Rondedzero Inoshanda |
|---|---|---|
| Saizi yebhawa | Mucheka anofanira kuenzana nedhayamita chaiyo inoshandiswa panzvimbo yacho. | #4 = 0.500 mukati, #5 = 0.625 mukati, #8 = 1.000 mukati |
| Giredhi resimbi | Simba guru rekukohwa rinoda simba rakakodzera rekucheka. | Magiredhi eASTM A615 anosanganisira 40,000–100,000 psi yield levels |
| Kuratidzwa kweruzha | Kusarudza zvishandiso uye urefu hwechishandiso zvinokanganisa dziviriro yekunzwa. | OSHA kuvakwa kwenhamba: 90 dBA kwemaawa masere |
| Kuchengetedza mavhiri anogumbura | Kuchengetedza zvisina kunaka kunowedzera njodzi yekusangana uye kupwanyika kweganda. | Kupisa kwakanyanya kwemavhiri hakufanirwe kudarika 180° kana paine magadhi anodiwa |
Tanga nekutarisa dhayamita ye rebar, giredhi resimbi uye huwandu hwekucheka zvichienderana nekukwanisa kwemuchina. muchina wekucheka bhaa resimbi panzvimbo yakatsiga, yakati sandara ine nzvimbo yakakwana yekupa matanda marefu pasina kuakombamisa zvisina kunaka. Nzvimbo yebasa inofanira kunge isina migero yakasununguka, mvura yakamira, njodzi dzekugumburwa uye vashandi vasingadiwi. Matanho marefu anofanira kutsigirwa kumativi ese enzvimbo yekucheka kuitira kuti asadonhe, asamonereka kana kubhururuka kana kucheka kwapera.
Usati watanga kushanda, tarisa banga, guard, switch, cable, bar stop uye fixing bolts. Mushandi anofanira kupfeka dziviriro yemaziso, magirovhosi, shangu dzekuchengetedza uye dziviriro yekunzwa kana zvichidikanwa. Isa rebar munzvimbo yekucheka, chengeta maoko kure nenzvimbo yebanga uye vhura cutter zvichienderana nemirairo yekushandisa. Usamanikidza bar parutivi, usacheke kupfuura kugona kwakayerwa uye usabvisa offcut kusvika banga ramira zvachose. Kana muchina ukanonoka zvakanyanya, uchiita ruzha rusina kujairika kana kusiya magumo akachekwa akakanganisika, mira woongorora mamiriro ebanga, giredhi rebha uye kugona kwemuchina usati waenderera mberi. Mucheki akanaka anofanira kunzwika akabatikana, kwete akatsamwa.
Ongororo yezvekuchengetedza yekucheka rebar inofanira kusanganisira kuzivikanwa kwebhawa, kugona kwemuchina, mamiriro ebanga, mamiriro ekudzivirira, kuchengetedzeka kwemagetsi, rutsigiro rwakagadzikana, kubviswa kwe offcut uye PPE yakakodzera. Dziviriro yekunzwa inofanirwa kutariswa zvakanyanya nekuti ruzha rwekuvaka rwakajairika. Nhamba dzeruzha rwekuvaka kweNIOSH vanoshuma kuti 52% yevashandi vekuvaka vane ruzha vanoti havapfeki dziviriro yekunzwa, uye vanenge 23% yevashandi vekuvaka vane ruzha vakaedzwa vane dambudziko rekunzwa. Izvi zvinoita kuti kuronga ruzha kuve chikamu chenzira yekucheka, kwete chimwe chinhu chekufunga nezvacho chete mushure mekunge vashandi vatanga kupopotedzana muchivanze.
Mushure mekucheka nekuisa simba rekusimbisa, mapoka enzvimbo anofanirawo kudzora magumo emabhawa akafumurwa. OSHA 1926.701 inoda simbi inosimudzira simba iyo vashandi vanogona kuwira pairi kana kuti kuichengetedza kuti vabvise njodzi yekurovera. Pfungwa iyi iri nyore kufuratira kana munhu wese akatarisa pakugadzira, asi simbi yekucheka haive yakachengeteka nekuti basa rekucheka rapera. Matanho ekutanga, simbi yekusimbisa, magumo ekeji nenzvimbo dzekusimbisa dzakamanikana zvese zvinoda kutariswa vashandi vasati vaenderera mberi nekufamba munzvimbo iyi.
Kusarudza muchina wekucheka rebar wakakodzera kunotanga nedhayamita yepamusoro yebhaa, giredhi resimbi uye huwandu hwekucheka hwezuva nezuva. Mugadziri mudiki angada muchina wekucheka rebar wemagetsi unotakurika kuti agadzirise nzvimbo, nepo nzvimbo yekugadzirisa reinforcement ingada muchina wakasimba une simba guru uye urongwa hwakasimba hwekudyisa. Vatengi vanofanirawo kuenzanisa kudya nemaoko, zvishandiso zvehukuru, kushanda otomatiki kana semi-otomatiki, kutsiva blade, nzvimbo dzekuzora, mukana wekugadzirisa uye kuwanikwa kwezvikamu zvezvimwe.
Pakuvaka mabhiriji, mapurojekiti emugero, nheyo dzekuvaka uye basa rekusimbisa rakagadziriswa, muchina wekucheka rebar wakatsaurirwa unovandudza mashandiro ebasa nekuti matanda anogona kuchekwa kusvika pakureba usati wakotama, kusungirira kana kubatanidza keji. Muchina wakangwara hausi unorema chete, wakachipa kana une tsananguro yekutengesa ine ruzha. Muchina wekucheka unoenderana nehurongwa hwekusimbisa, hunyanzvi hwemushandisi, simba remagetsi, zvinodiwa pakufamba uye kugona kugadzirisa nzvimbo yebasa. Ndizvo zvinoita kuti vagadziri vacheke nekukurumidza vasina kushandura kuchengetedzeka kuita kufunga kwekupedzisira.
Nzira yakachengeteka ndeyekushandisa chishandiso chakayerwa dhayamita ye rebar uye giredhi resimbi, kutsigira bhaa zvakanaka, kuchengetedza maoko kure nenzvimbo yekucheka uye kupfeka PPE yakakodzera. Kune kucheka kwakadzokororwa, gadzira chishandiso chakatsaurirwa. mucheki we rebar kazhinji kacho kwakasimba uye kunogara kwenguva refu kupfuura nzira dzekucheka dzakagadzirwa nemaoko.
Ehe, muchina wekugera makona unogona kucheka rebar nedhisiki uye guarding yakakodzera, asi unogadzira sparks, ruzha, kupisa uye guruva rinokuvadza. Inoshanda kana ukacheka dzimwe nguva, nepo muchina wekugera makona uchiwanzova nani kana ukacheka panzvimbo yekuvaka kakawanda.
Tarisa dhayamita yepamusoro yekucheka, kuenderana kwesimbi, simba remagetsi, rudzi rwebanga, nzira yekushanda, mukana wekugadzirisa, kuwanikwa kwezvikamu zvekuchengetedza uye kana muchina wacho uchikodzera mapurojekiti ako ekuvaka akajairika.
Muchina wekucheka simbi wemagetsi unowanzo shandiswa pabasa repanzvimbo uye pabasa rekucheka riri pakati nepakati. Muchina wekucheka simbi wehydraulic unowanzo shandiswa zvakanyanya kana paine matanda makobvu, kucheka kakawanda kana simba rakasimba rekucheka.
