Masamba a harrow odulidwa ndi ulimi, olimba komanso osawonongeka
Ma disc odulidwa ndi minga: Mphepete mwa diski muli ma notches ofanana ngati arc kapena trapezoidal, zomwe zimathandiza kuti nthaka ilowe mwachangu komanso kuti isagwere kwambiri. Amachita bwino kwambiri podula mapesi ataliatali, mapesi a chimanga, ndi udzu wosakanikirana, zomwe zimapangitsa kuti akhale oyenera kulima koyamba m'nthaka yolemera ya dongo kapena m'minda yokhala ndi mapesi ambiri.
Ma disc osalala komanso ozungulira a harrow: M'mbali mwake ndi osalala komanso osasunthika, zomwe zimapangitsa kuti pamwamba pakhale posalala komanso nthaka yofanana isweke bwino mutabzala. Ndi oyenera nthaka yopepuka yamchenga, nthaka yachiwiri isweke bwino mutabzala, komanso kukonzekera bedi la mbewu musanabzale.
Masamba a rake awa amagwiritsa ntchito chitsulo cha manganese cha 65Mn kapena chitsulo cha high-boron cha 30MnB ngati maziko. Zipangizo zonsezi zili ndi malire abwino kwambiri otanuka komanso kulimba. Pambuyo poumba kutentha kwambiri, tsamba lonselo limaphwanyidwa ndi isothermal kapena kutentha kogawika, zomwe zimapangitsa kuti kuuma kwa pamwamba pa 38-48 HRC kukhalebe kosinthasintha. Izi zimathetsa kutsutsana pakati pa "kuuma kwakukulu komwe kumabweretsa kuphwanya ndi kulimba kwakukulu komwe kumabweretsa kuphwanya." Mphepete mwapamwamba imatha kupangidwa ndi carburize pamwamba kapena kuumitsidwa ndi laser, zomwe zimapangitsa kuti kuuma kupitirire 56 HRC ndikuwonjezera nthawi yogwiritsidwa ntchito ndi 30%.
Masamba a thanki okhala ndi corrugated: okhala ndi m'mbali zozungulira, makamaka amagwiritsidwa ntchito kumasula pamwamba pa nthaka pambuyo pophimba mbewu ndi kukanikiza. Ntchitoyi ndi yosaya koma kuphimba kwake ndi kwabwino. Nthawi zambiri amagwiritsidwa ntchito limodzi ndi obzala mbewu.
Tsamba lililonse la rake limapangidwa ndi CNC spinning kapena precision forging kuti zitsimikizire kuti kunja kwa diameter kumayenda bwino kuposa ≤1.5mm, zomwe zimapangitsa kuti kuzungulira kosalala, kosagwedezeka pambuyo pomanga. Bowo loyikira pakati limabowoledwa bwino, ndipo kulolerana kwa diameter kumayendetsedwa bwino mkati mwa H9 grade, kuonetsetsa kuti shaft ya rake ikugwirizana bwino. Asanachoke ku fakitale, 100% ya zinthuzo amayesedwa ndi tinthu tating'onoting'ono ta maginito ndi kuyesa kuuma kuti achotse ming'alu kapena mawanga ofewa.
Imagwiritsidwa ntchito kwambiri pochotsa ziputu ndi kumasula nthaka m'minda ya chimanga, tirigu, ndi soya; komanso kubisa udzu ndi kupukutira m'minda ya mpunga yomwe imakula nthawi yozizira. Itha kufananizidwa ndi ma disc harrow sets ochokera kumakampani akuluakulu am'dziko muno komanso apadziko lonse lapansi (monga Reken, Kuhn, Deere, ndi zina zotero), ndipo ikhozanso kusinthidwa malinga ndi zojambula za makasitomala zokhala ndi mainchesi osiyanasiyana (450-700mm), makulidwe (4-8mm), ndi mawonekedwe a dzenje lapakati.
