Vanhu vazhinji havazivi kuti pane imwe yechiratidzo che Rockwell
Zvinyorwa zvishoma, Rockwell kuoma kwakaedzwa ndiyo nzira yekuyera kuoma kwezvinhu. Dombo rakaoma Rockwell rinowanzogadziriswa kuratidza kuoma kwesimbi, zvakadai sesimbi yakaonda, cemented carbides, lead, aluminium, zinc, copper alloys, titanium, uye iron. Asi chiyero chinoshandiswawo kuedza zvimwe plastiki.
Dambudziko, sezvinoyerwa neDeanwell scale, rinoreva kushorwa kupinda mukati.
Muedzo wacho unowana zita rawo kubva kuna Stanley P. Rockwell, uyo akafunga kuedza uye mishonga yepakutanga, akazozvitengesa kodzero kwavari. Muedzo wacho wakatanga kupiwa muna 1919.
Kunyangwe dombo rakaoma Rockwell rinoshanda sei
Dombo rakaoma Rockwell rinoedza kuoma kushanda nenzira yakajeka inogona kuitika: nekusvitsa dhivhari mukati memashoko acho nemutoro wakadaro wozoyera kuti kure indentor yakakwanisa kupinda sei. Kazhinji yenguva, iyo indenter inogadzirwa neyimbi yesimbi kana dhamondi.
Asi, zvechokwadi, chokwadi chiri chakaoma zvikuru, nokuti simbi dzesimbi dzinosiyana zvakanyanya. Somugumisiro, nzira imwechete haigone kushandiswa kune dzose sampuli. Zvechokwadi, kune 30 dzakasiyana-siyana Rockwell zviyero. Rimwe nerimwe rinoshandisa kusiyaniswa kwemasimba ehondo uye marudzi evanhu vanoita zvinhu. Pakusarudza chiyero chakanaka chemuenzaniso wesimbi, vatsvakurudzo vanofunga ukuru uye maitiro ezvidzidzo zvekuongorora, homogeneity, uye kukwana kwechiyero chimwe nechimwe.
Nepo kune huwandu hwekuedza kwe Rockwell, iyo yakajairika yezvinhu zvakaoma zvikuru ndeye Rockwell uye Rockwell C. Kana zvinhu zvakanyanyisa zvakanyanya, zvigadzirwa zvemuchena zvinofanira kushandiswa: Rockwell 30T, 1ST, Rockwell 15-N, uye 30- N zviyero. Sezvaunogona kuona kubva kuzviyero izvi, Rockwell kuoma nhamba inosanganisira chigamba chinotarisa chikwata che Rockwell chinoshandiswa mukugadzirisa pamwe nekubatanidzwa kwemutoro uye zvinyorwa.
Iko kune kutendeuka kwechirongwa chichabvumira kutendeuka kubva kune imwe nzira yekuoma kune imwe, asi inofanira kuyeukwa kuti aya mararamiro ekushandura haagoni kunyatsochinja kubva kune imwe kuenda kune imwe.
Vanhu vakawanda vanotarisa mhinduro kubva kuReadwell kuoma kwekuedza havazive kuti marudzi akawanda ezviyero aripo. Nokudaro, vangave vasinganzwisisi kuti kutendeuka kwechirati hazvikwanisi zvachose. Ndiko kuti Rockwell zviyero hazvina zvikamu. Sezvo Sizes.com inotsanangura, "Chiratidzo ndicho HR inoteverwa netsamba inoratidza imwe yezviyero zvinogona kuitika.Semuenzaniso, 'HRC 96' inoreva 96 paDombowell C."
Chiyero chakafanana kuna Rockwell kuoma
Dombo re Rockwell rakafananidzirwa neMuedzo weMohs uye chikamu cheBrinell. Chikamu cheBrinell chakasimbiswa nemuchina weSweden Johann A. Brinell muna 1910, uye inoshanda seinotevera. Mutoro unoshandiswa kune bhora rakaoma rakagadzika pamusoro penzvimbo yakadzika yesimbi yakamirira kuongororwa. Mushure meizvi, hupamhi hwehutano huri huri hunoongororwa.
Maererano neSizes.com, uhutu hunotaridzwa nemhando iyi: "Nhamba yeBrinell inoratidza dambudziko resimbi ndiro iyo mutoro uri pabhokisi mumakirogiramu akaparadzaniswa nechepamusoro penzvimbo yeiyo mumakiromita masere."