Shrinkage mukukanda chinhu chakakosha chinokanganisa zvakanyanya kunaka uye kusarongeka kwechigadzirwa chekupedzisira. Kunzwisisa marudzi akasiyana e shrinkage anoenderana nezvinhu zvakasiyana, senge cast steeluyesimbi yakakandwa, pamwe chete nezvikonzero zvinokonzera kukanganisa senge shrinkage cavities uye kupisa kunopisa, zvakakosha pakuita maitiro anobudirira ekukanda.
Shrinkage muCast Steel uye Cast Iron
Paunenge uchikurukura nezve shrinkage, zvakakosha kusiyanisa pakati pezvinhu zviviri zvekutanga zvinoshandiswa mukukanda:cast steeluyesimbi yakakandwa. Zvese zviri zviviri zvinhu zvinoratidza shrinkage, asi maitiro uye mitengo inogona kusiyana.
Cast steel kazhinji inosangana nekuderera kunokwana kuita1.5% kusvika 2%kubva pakunyungudutswa kwayo kusvika pakusimba kwayo. Iyi shrinkage inonyanya kukonzerwa nekupisa kwekupisa kwezvinhu sezvazvinotonhora. Mukupesana, simbi yakakandwa ine yakakwira shrinkage rate, kazhinji yakatenderedza2% kusvika 3%. Iyo yekuwedzera shrinkage musimbi yakakandwa inogona kuverengerwa kuumbwa kwayo, iyo inosanganisira yakakwira kabhoni yemukati inokanganisa maitiro ayo ekusimba.
Actual Shrinkage of Castings
Kudzikira chaiko kunoreva kushanduka kwedimensional kuzere kunowanikwa nekukandwa kubva pamvura yayo kusvika pakusimba kwayo kwekupedzisira. Izvi zvinogona kusanganisira zvese volumetric shrinkage panguva yekutonhora uye mhedzisiro yekusimba. Dhizaini yakakodzera uye kuverenga kweiyo yekukanda geometry kwakakosha kugarisa iyi shrinkage, sezvo kutadza kuita izvi kunogona kutungamira kune dimensional kusarongeka uye kukanganisa michina zvinhu.
Shrinkage Cavities uye Porosity
Shrinkage cavities, inozivikanwawo se shrinkage voids, inoitika kana simbi yemvura ikatadza kuzadza mold nekuda kwekusadya kwakakwana panguva yekusimba. Ichi chiitiko chinogona kutungamirira kune dzisina simba pfungwa mukukanda, zvichiita kuti zvive nyore kukundikana pasi pemutoro. Kune rumwe rutivi, porosity-inowanzoonekwa mukukanda-inonyanya kukonzerwa nekuvhara gasi kana nzira dzisina kunaka dzekudira, izvo zvinogona kuwedzera kuderedza kutendeseka kwemaitiro.
Kupisa Kutsemuka uye Kukandira Stress
Kupisa kwakatsemuka ndechimwe chinhu chakakosha mukukanda. Izvi zvinoitika kana kukanda kuchiri patembiricha yakakwira asi kwatotanga kusimba. Kushushikana kunokonzerwa panguva yekutonhodza kunogona kudarika simba rekusimba rezvinhu, zvichikonzera kuputsika. Kudzora chiyero chekutonhodza uye kunzwisisa kudziya kwemidziyo kunogona kubatsira kudzikisira njodzi dzekupwanya kunopisa.
Cold Cracking uye Deformation
Kupwanya kutonhora kunoitika mushure mekunge kukanda kwatonhora kusvika kukushisa kwekamuri uye kazhinji kunokonzerwa nekusarira kunetseka. Izvi zvinoshungurudza zvinogona kusimuka kubva mukutonhodza kusina kuenzana, izvo zvinotungamira mukusiyanisa kudzvanywa mukati mekukanda. Kushushikana kwakadaro kunogona kukonzera deformation, zvichikanganisa chimiro chekupedzisira chekukanda uye kushandiswa.
Kuti uderedze mukana wekutonhora kutsemuka uye deformation, zvakakosha kuita nzira dzekutonhodza dzakafanira uye maitiro ekuzorodza-kushushikana panguva uye mushure mekukanda.
Nguva yekutumira: Oct-25-2024