Choyamba, ubwino wapadera wa nkhuni
1, matabwawo ndi olimba komanso olimba, makamaka chifukwa matabwa ndi opepuka komanso amphamvu kwambiri, chiŵerengero cha mphamvu ndi kachulukidwe ka nkhuni ndipamwamba kuposa chitsulo chonse.
2, ntchito yokonza matabwa ndiyopambana, makamaka chifukwa cha zinthu zamatabwa ndizopepuka, zofewa, kugwiritsa ntchito zida zosavuta kumatha kusinthidwa kukhala mitundu yosiyanasiyana yazogulitsa. Kukonza nkhuni kumadya mphamvu zochepa ndipo ndi chinthu chopulumutsa mphamvu.
3, nkhuni sizichita dzimbiri, osati zophweka kuti zikhale ndi dzimbiri.
4. Wood (nkhuni youma) imakhala ndi mphamvu yofooka ya kutentha ndi magetsi, kuyankha kochepa kwa kutentha kwa kutentha, kuyaka kwamphamvu, ndipo palibe chodabwitsa cha kuwonjezereka kwa kutentha ndi kutsika. Choncho, nkhuni ndizoyenera kugwiritsidwa ntchito posungunula kutentha ndi zofunikira zakuyatsa magetsi kumalo okwera. Mipando yopangidwa ndi matabwa imatha kupatsa munthu kutentha m'nyengo yozizira komanso kuziziritsa m'chilimwe.
5, matabwa zimamuchulukira si Chimaona ngati wosweka, kuti mipando matabwa, kuwonjezera chitetezo.
6. Ngakhale kuti nkhuni zidzawotchedwa kutentha kwakukulu, kusinthika kwa matabwa akuluakulu kumakhala kochepa komanso pang'onopang'ono kusiyana ndi kapangidwe kazitsulo, ndipo kumatha kukhalabe ndi mphamvu zinazake pamene pang'onopang'ono kuwotchedwa kapena carbonized, pamene chitsulo chopangidwacho chidzakwawa ndikugwa mofulumira chifukwa cha kutentha kwakukulu.
7, mtundu wa nkhuni, chitsanzo chokongola, panthawi imodzimodziyo pambuyo pomaliza kumasulira kudzakhala kosangalatsa m'maso, koyenera kupanga mipando, mabokosi a zida, zaluso ndi zina zotero.
Awiri, ambiri zilema matabwa
Pali ubwino, mwachibadwa padzakhala zofooka, ngakhale matabwa ali ndi makhalidwe abwino kwambiri, koma chifukwa cha makhalidwe awo, palinso zofooka zomwe sizinganyalanyazidwe. M'munsimu, tiyeni tikambirane zolakwa zenizeni.
1, nkhuni ndi anisotropic heterogeneous material, ndiko kuti, pali kusiyana kwina pakuchita kwa gawo lililonse, makamaka kumawonetsedwa ngati mitundu yosiyanasiyana ya thupi ndi makina a kusiyana. Kukula kosagwirizana kumakulitsa kupindika kwa nkhuni, ndipo kusiyana kwa mphamvu ndikosavuta kumayambitsa kusweka kwa nkhuni.
2. Wood ndi zinthu za hygroscopic, ndiye kuti, ndizosavuta kunyowa. Choncho pansi pa zinthu zachilengedwe zidzachitika chonyowa kuwuka, youma shrinkage, bwanji kukhazikika kwa kukula kwa matabwa khalidwe, kuti n'zosavuta mapindikidwe.
3, nkhuni ndi chilengedwe polima organic polima, amene amapanga tizilombo ndi bowa (nkhuku, nkhungu zowola mabakiteriya) akhoza parasitic, ndiko kuti, zosavuta kukopa tizilombo ndi dzimbiri, kuti matabwa thanzi, matabwa mankhwala chiwonongeko, kuchititsa lalikulu anthu, chuma ndi ndalama zomvetsa.
4, kuyanika nkhuni kumakhala kovuta kwambiri. Zopangira matabwa ziyenera kupangidwa ndi matabwa owuma. Wood kuyanika kudya mphamvu zambiri, ndi pang'ono chidwi chidzachitika warping, akulimbana ndi zolakwika zina, kubweretsa zosafunika zomvetsa.
5. Wood ndi yoyaka. Pamene nkhuni zambiri zimagwiritsidwa ntchito, chidwi chiyenera kuperekedwa ku kulimbikitsa njira zopewera moto.
Nthawi yotumiza: Dec-12-2022