Simbi isina ngura inouya nenzira dzakasiyana-siyana. Zvakakosha kuziva kuti idzi nzira dzakajairika dzekugadzirisa simbi ndedzipi uye kuti nei dzichikosha. Zvitsva zvitsva muhunyanzvi hwekugadzira simbi zvinogona kuderedza matanho ekugadzirisa simbi kuti ipe simbi yaunoda, kusanganisira kubwinya kwepadenga kwaunoda.
Simbi isina ngura inogona kuoma kushanda nayo, asi chigadzirwa chapera chinopa chitarisiko chakanakisa uye chinoita kuti basa rese rive rakakodzera. Kazhinji zvinogamuchirwa kuti kushandisa grit yakapfava mujecha rekugadzira kunogona kubvisa mapatani ekukwenya ekare uye kunatsiridza kupedzisa, asi pane matanho akawanda ekuziva kana uchishandisa grit sequences dzakawanda kuti uwane kupedzisa kwaunoda.
Simbi isina ngura inouya nenzira dzakasiyana-siyana. Zvakakosha kuziva kuti idzi nzira dzakajairika dzekugadzirisa simbi ndedzipi uye kuti nei dzichikosha. Zvitsva zvitsva muhunyanzvi hwekugadzira simbi zvinogona kuderedza matanho ekugadzirisa simbi kuti ipe simbi yaunoda, kusanganisira kubwinya kwepadenga kwaunoda.
Indasitiri yeSimbi yeSpecialty yeNorth America (SSINA) inotsanangura mitemo yeindasitiri uye uko zvigadzirwa zvinoshandisa nhamba dzakasiyana dzekupera.
Nhamba 1 yapera. Kugadziriswa uku pamusoro pechinhu kunoitwa nekumonera simbi isina ngura (inomonera inopisa) iyo yakapiswa isati yamonera. Kupedzisa kwacho kushoma, ndosaka kuchinzi kwakaoma. Zvigadzirwa zvakajairika zvine nzvimbo yekutanga zvinosanganisira maair heater, ma annealing boxes, ma boiler baffles, zvikamu zvakasiyana-siyana zvefurnace, uye ma gas turbines, kungotaura zvishomanana.
Nhamba 2B yapera. Nzvimbo iyi inopenya inotonhorera yakaita segirazi rine makore uye haidi matanho ekupedzisa. Zvikamu zvine 2B finish zvinosanganisira mapani epasi rose, michina yemakemikari, zvimedu zvekucheka, michina yekugaya mapepa uye michina yepombi.
Kunewo 2D finish muchikamu chechipiri. Iyi finish yakaenzana, isina ruvara rwesirivha grey yemacoils akatetepa, ukobvu hwayo hwakaderedzwa nekuita kwekupedza kutonhora zvishoma sezvo ichiwanzo shandiswa nefekitori finish. Kubvisa chromium muchina wekuchenesa kana kubvisa scaling kunodiwa mushure mekupisa kuti ubvise chromium. Kubvisa chromium muchina wekuchenesa kunogona kuva danho rekupedzisira rekugadzira iyi finish. Kana finish yakapendwa ichidikanwa, 2D finish inosarudzwa se substrate sezvo inopa pendi yakabatana zvakanaka.
Nhamba 3 yePolish ine mitsetse mipfupi, yakakora, uye inofanana yekupukuta. Inowanikwa nekupukuta nemidziyo inobvisa zvinhu zvishoma nezvishoma kana nekupinza macoil kuburikidza nemaroller akakosha anodzvanya mapatani pamusoro, zvichitevedzera kutaridzika kwekupfeka kwemidziyo. Inopera zvine mwero.
Pakupukuta nemechanical, grit 50 kana 80 inowanzo shandiswa pakutanga, uye grit 100 kana 120 inowanzo shandiswa pakupukuta kwekupedzisira. Kuomarara kwepamusoro kunowanzo kuve neavhareji yekuomarara (Ra) ye40 microinches kana pasi. Kana mugadziri achida fusion welds kana kumwe kuchekerera, mutsetse wekupukuta unobuda unowanzo kureba kupfuura chigadzirwa chakaposhwa nemugadziri kana roll polisher. Chinhu chinonyanya kuwanikwa mumidziyo yedoro, michina yekugadzira chikafu, michina yekicheni, uye zvishandiso zvesainzi ndiyo finish yenhamba 3.
Kupedzisa kwenhamba 4 ndiko kunonyanya kushandiswa uye kunoshandiswa mumaindasitiri emidziyo nekudya. Chitarisiko chayo chinoratidzwa nemitsetse mipfupi yakapetwa yakaenzana yakatambanuka zvakaenzana pakureba kwecoil. Inowanikwa nekupukuta kwemuchina nhamba 3 nekubvisa zvinyoro zvishoma nezvishoma. Zvichienderana nezvinodiwa pakushandisa, kupera kwekupedzisira kunogona kuva pakati pe120 ne320 grit. Kupukuta kwakakwirira kunogadzira mitsetse yakapetwa yakapetwa uye kupera kunoratidza zviri nani.
Kuomarara kwepamusoro kunowanzova 25 µin. kana pasi. Kupera uku kunoshandiswa zvakanyanya mumidziyo yemaresitorendi neyekicheni, muzvitoro, mukugadzira chikafu uye mumidziyo yemukaka. Sezvakaita paFinish No. 3, kana mushandi achida kusanganisa welds kana kuita zvimwe zvinhu zvekupedzisa, tambo yakakwenenzverwa inowanzo kureba kupfuura tambo iri pachigadzirwa chakakwenenzverwa nemugadziri kana mupurishi weroll. Dzimwe nzvimbo dzinowanikwa Finish 4 dzinosanganisira matrailer emumugwagwa, nzvimbo dzechipatara nemidziyo, mapini ekushandisa kana ekudzora, uye zvinopa mvura.
Nhamba 3 yePolish ine mitsetse mipfupi, yakakora, uye inofanana yekupukuta. Inowanikwa nekupukuta nemidziyo inobvisa zvinhu zvishoma nezvishoma kana nekupinza macoil kuburikidza nemaroller akakosha anodzvanya mapatani pamusoro, zvichitevedzera kutaridzika kwekupfeka kwemidziyo. Inopera zvine mwero.
Chigadziko nhamba 7 chinopenya zvakanyanya uye chinoratidzika segirazi. Chigadziko chakakweshwa kusvika 320 grit uye chigadziko nhamba 7 chakakweshwa chinowanzo kuwanikwa muma column caps, trim yekushongedza uye mapaneru emadziro.
Kwave nekufambira mberi kukuru mukushandisa mabrasives anoshandiswa kugadzira ma surface finishes aya, zvichibatsira vagadziri kugadzira zvikamu zvakawanda zvakachengeteka, nekukurumidza, uye zvinodhura. Zvicherwa zvitsva, fibers dzakasimba uye masisitimu e resin anodzivirira kusvibiswa zvinobatsira kugadzirisa maitiro ekupedzisa.
Aya mabrasives anopa kucheka nekukurumidza, kurarama kwenguva refu, uye kuderedza huwandu hwematanho anodiwa kuti basa riitwe. Semuenzaniso, flap ine microcracks mu ceramic particles inowedzera hupenyu hwayo zvishoma nezvishoma uye inopa kupera kwakafanana.
Pamusoro pezvo, matekinoroji akafanana neabrasive aggregates ane zvidimbu zvinobatana kuti zvicheke nekukurumidza uye zvinopa kupedzisa kuri nani. Zvinoda matanho mashoma uye zvinhu zvisinganyanyi kukwesha kuti zviite basa racho, uye vazhinji vanoshanda vanoona kushanda zvakanaka uye kuchengetedza mari.
Michael Radaelli is Product Manager at Norton|Saint-Gobain Abrasives, 1 New Bond St., Worcester, MA 01606, 508-795-5000, michael.a.radaelli@saint-gobain.com, www.nortonabrasives.com.
Vagadziri vanomanikidzwa kupedzisa makona nepakati pezvikamu zvesimbi isingasvibi. Kuti isanganise ma weld akaoma kusvika uye kugadzira nzvimbo, ine maitiro mashanu anoda vhiri rekukuya, sikweya ine grits dzakawanda, uye vhiri rekukuya rakafanana.
Kutanga, vashandi vanoshandisa vhiri rekukuya kuti vakwenye zvakadzama pazvinhu izvi zvesimbi isina ngura. Mavhiri ekukuya anowanzo kuoma uye haanyanyi kuregerera, zvichiita kuti mushandi awane dambudziko pakutanga. Danho rekukuya raitora nguva uye raisiya mavanga aifanira kubviswa nematanho matatu ekuwedzera ekupedzisa mapadhi ane saizi dzakasiyana dzezviyo. Danho iri rinoteverwa nekushandisa mavhiri akafanana kuti vasvike pakupedzisa kwepamusoro kwaidiwa.
Nekuchinja vhiri rekukuya kuita vhiri receramic lobe, mushandi akakwanisa kupedzisa kupukuta mudanho rekutanga. Achiramba achishanda zvakafanana nedanho rechipiri, mushandi akatsiva ma square pads ne flap wheel, zvichivandudza nguva nekupera.
Kubvisa padhi re 80-grit square pad woritsiva ne non-woven mandrel ine agglomerated particles zvichiteverwa ne 220-grit non-woven mandrel inobvumira mushandisi kugadzira kupenya kwaanoda uye kupedzisa kwese uye kubvisa kudiwa kwe. Danho rekupedzisira ndiro rekutanga (shandisa unity wheel kuvhara danho).
Nekuda kwekuvandudzwa kwemavhiri eflapper uye tekinoroji isina kurukwa, huwandu hwematanho hwakaderedzwa kubva pashanu kusvika pamana, izvo zvinoderedza nguva yekupedzisa ne40% uye zvinoderedza mari yevashandi nezvigadzirwa.
Kwave nekufambira mberi kukuru mukushandisa mabrasives anoshandiswa kugadzira zvinhu izvi, zvichibatsira vagadziri kugadzira zvikamu zvakawanda zvakachengeteka, nekukurumidza, uye nemutengo wakaderera.
WELDER, yaimbonzi Practical Welding Today, inoratidza vanhu chaivo vanogadzira zvigadzirwa zvatinoshandisa uye zvatinoshanda nazvo zuva nezuva. Magazini iyi yave ichishandira nharaunda yevanosanganisa simbi muNorth America kwemakore anopfuura makumi maviri.
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