鑄件的精度和生產過程的經濟表現,主要取決于這道工序。在很多現代化的配重鐵車間(jian)里(li),造(zao)型造(zao)芯都實現(xian)了機(ji)(ji)械化或自動化。常用的砂(sha)型造(zao)型造(zao)芯設備有(you)高、中、低壓(ya)造(zao)型機(ji)(ji)、拋(pao)砂(sha)機(ji)(ji)、無箱射(she)壓(ya)造(zao)型機(ji)(ji)、射(she)芯機(ji)(ji)、冷和熱芯盒(he)機(ji)(ji)等。
叉車配重鐵(tie)(tie)(tie)工藝可分(fen)為(wei)三個基本部分(fen),即配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)金(jin)(jin)(jin)(jin)屬(shu)(shu)準備(bei)、鑄型(xing)(xing)(xing)(xing)準備(bei)和(he)(he)鑄件(jian)處理。 配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)金(jin)(jin)(jin)(jin)屬(shu)(shu)是指配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)生產中用于澆注鑄件(jian)的(de)金(jin)(jin)(jin)(jin)屬(shu)(shu)材料,它是以一種金(jin)(jin)(jin)(jin)屬(shu)(shu)元(yuan)素為(wei)主(zhu)(zhu)要成分(fen),并加入其(qi)他金(jin)(jin)(jin)(jin)屬(shu)(shu)或非(fei)金(jin)(jin)(jin)(jin)屬(shu)(shu)元(yuan)素而組成的(de)合金(jin)(jin)(jin)(jin),習(xi)慣上稱為(wei)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)合金(jin)(jin)(jin)(jin),主(zhu)(zhu)要有鑄鐵(tie)(tie)(tie)、鑄鋼和(he)(he)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)有色合金(jin)(jin)(jin)(jin)。叉(cha)車(che)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)按造(zao)型(xing)(xing)(xing)(xing)材料的(de)不同,又可分(fen)為(wei)兩大類:一類以天然礦產砂石作為(wei)主(zhu)(zhu)要造(zao)型(xing)(xing)(xing)(xing)材料,如熔(rong)模配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、殼型(xing)(xing)(xing)(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、負壓(ya)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、泥型(xing)(xing)(xing)(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、實型(xing)(xing)(xing)(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、陶瓷(ci)型(xing)(xing)(xing)(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)等;一類以金(jin)(jin)(jin)(jin)屬(shu)(shu)作為(wei)主(zhu)(zhu)要鑄型(xing)(xing)(xing)(xing)材料,如金(jin)(jin)(jin)(jin)屬(shu)(shu)型(xing)(xing)(xing)(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、離心配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、連續配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、叉(cha)車(che)配(pei)(pei)件(jian)鐵(tie)(tie)(tie)、低壓(ya)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)等。
配重塊結構(gou)設計除應符(fu)合機(ji)器設備本身(shen)的要(yao)求和機(ji)械(xie)加工(gong)工(gong)藝性的要(yao)求外(wai),還應符(fu)合鑄造工(gong)藝的要(yao)求,配重塊(kuai)的結構(gou)設計應注(zhu)意以下(xia)幾點(dian):
一、要便于制(zhi)造模(mo)型、芯(xin)盒(he)和造型:
1)配重塊(kuai)的外形應(ying)力(li)求簡單,以(yi)便(bian)于起模(mo),應(ying)盡量(liang)使鑄造(zao)分型面(mian)為(wei)平面(mian),且(qie)數目(mu)小;
2)配重(zhong)塊的(de)內(nei)腔(qiang)應力求鑄造(zao)時(shi)不用(yong)或少用(yong)型(xing)芯(xin),當采用(yong)型(xing)芯(xin)時(shi),應方便(bian)其支撐、固(gu)定(ding)及排(pai)氣出砂(sha),時(shi)應設(she)有足夠(gou)的(de)工(gong)藝孔;
3)對于配重塊內外側面(mian)及加強肋等結構(gou)(gou),應在起模方向設有(you)的結構(gou)(gou)斜(xie)度;
4)配(pei)重塊上(shang)的(de)凸臺部(bu)分與配(pei)重鐵本體不應相差(cha)過大(da),好(hao)(hao)取(qu)同一高度(du),同一面上(shang)的(de)距離較近的(de)幾個凸臺,好(hao)(hao)連成整體的(de)凸起部(bu)分。
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