Nkhumba za chihema ndi chinthu chofunikira chokhazikitsa. Monga lamulo, iwo amapita phukusi lomwelo ndi chihema, koma ngati kuli koyenera iwo angagulidwe mosiyana.
Mitundu ya zikopa
Mitundu yambiri yamagetsi:
- mapeyala a matabwa - ndi njira yophweka, amatha kupangidwa mosavuta ndi nkhuni zowonongeka;
- zingwe zopangira zitsulo. Iwo ndi owonda, ochepetsetsa, olemera, ndi otchipa kusiyana ndi mitundu ina ya mankhwala. Ali ndi mamita pafupifupi 5 mm;
- waya zitsulo zotayidwa zitsulo za hema. Amasiyana ndi mphamvu zawo poyerekezera ndi zitsulo. Mphuno wamba wa zingwe zonse zazingwe ndikuti iwo amatembenukira, musamamatire bwino mumchenga ndi kumathamanga pansi mu mphepo yamphamvu;
- Nkhumba zooneka ngati V zojambulazo - zimakhazikika pansi, zimakhala zovuta kuchotsa. Chifukwa cha izi, angagwiritsidwe ntchito ngati zingwe za hema wa mchenga.
Anamanganso zikhomo zamatabwa
Nsomba zolimbikitsidwa zimagwiritsidwa ntchito, ngati kuli koyenera, kuyika hema pa miyala yamwala. Zipangizo zooneka ngati V zopangidwa ndi duralumin alloy zingakhale zofewa kwambiri ndipo zimangowonongeka mwamsanga pamene zimagwiritsidwa ntchito. Mitundu yotsatirayi imakhala yolimba kwambiri:
- Tetanamu yofanana ndi V, yomwe ili khumi kapena khumi ndi zisanu ndi zitatu-gramu;
- mapepala - amatchula zipangizo zamakono
dothi lapansi. Nkhumba ziri ndi kukula kwa 21.5 mm, mu phukusi 2 zidutswa. Iwo akulimbikitsidwa kuti azigwiritsidwa ntchito ngati zowonjezeretsa ku nthawi yowonongeka ndi kuyika pa zovuta kwambiri za hema wamkati. M'madera awa ndikofunikira kuonetsetsa kuti zitherapo.
Monga malamulo, zikhomo zimakhala zolemera kwambiri, zomwe zimapangitsa kuti aziyenda mofulumira kumadera omwe zingakhale zovuta kukonza hema.
Chifukwa cha mphamvu zake zapamwamba, zigoba zingagwiritsidwe ntchito m'mahema achisanu. Iwo ndi ovuta kwambiri kuti amangirire pa ayezi, koma zipangizo zodalirika zopangidwa ndi chitsulo chamtengo wapatali zidzathandiza kuti athe kukhazikika mosalekeza.
Kotero, zikhomo za hema zidzakuthandizani kuti muzisunge malo omwe sungapezeke. Zidzakhala ngati chitsimikiziro cha kayendetsedwe kabwino ka ulendowu ndipo zidzatheketsa njira yokhazikika yopangira chihema.