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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里,造(zao)型造(zao)芯(xin)都實(shi)現了機械化或自動(dong)化。常(chang)用的砂型造(zao)型造(zao)芯(xin)設備有高、中、低壓造(zao)型機、拋砂機、無箱射壓造(zao)型機、射芯(xin)機、冷和熱(re)芯(xin)盒機等(deng)。
叉車配重鐵(tie)(tie)(tie)(tie)(tie)工藝可分(fen)(fen)為(wei)(wei)(wei)(wei)三個基本部分(fen)(fen),即配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)金(jin)(jin)(jin)(jin)屬(shu)(shu)準備、鑄(zhu)(zhu)(zhu)型(xing)準備和鑄(zhu)(zhu)(zhu)件處理。 配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)金(jin)(jin)(jin)(jin)屬(shu)(shu)是指配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)生產中用于(yu)澆(jiao)注鑄(zhu)(zhu)(zhu)件的金(jin)(jin)(jin)(jin)屬(shu)(shu)材(cai)料,它是以一(yi)種金(jin)(jin)(jin)(jin)屬(shu)(shu)元素為(wei)(wei)(wei)(wei)主(zhu)要成分(fen)(fen),并加入其他金(jin)(jin)(jin)(jin)屬(shu)(shu)或非金(jin)(jin)(jin)(jin)屬(shu)(shu)元素而組成的合(he)金(jin)(jin)(jin)(jin),習慣上稱為(wei)(wei)(wei)(wei)配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)合(he)金(jin)(jin)(jin)(jin),主(zhu)要有鑄(zhu)(zhu)(zhu)鐵(tie)(tie)(tie)(tie)(tie)、鑄(zhu)(zhu)(zhu)鋼和配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)有色合(he)金(jin)(jin)(jin)(jin)。叉(cha)車配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)按造型(xing)材(cai)料的不同(tong),又可分(fen)(fen)為(wei)(wei)(wei)(wei)兩(liang)大類(lei):一(yi)類(lei)以天然礦(kuang)產砂石作為(wei)(wei)(wei)(wei)主(zhu)要造型(xing)材(cai)料,如熔模(mo)配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)、殼型(xing)配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)、負壓(ya)配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)、泥(ni)型(xing)配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)、實型(xing)配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)、陶瓷型(xing)配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)等(deng);一(yi)類(lei)以金(jin)(jin)(jin)(jin)屬(shu)(shu)作為(wei)(wei)(wei)(wei)主(zhu)要鑄(zhu)(zhu)(zhu)型(xing)材(cai)料,如金(jin)(jin)(jin)(jin)屬(shu)(shu)型(xing)配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)、離心配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)、連續配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)、叉(cha)車配(pei)(pei)(pei)(pei)件鐵(tie)(tie)(tie)(tie)(tie)、低壓(ya)配(pei)(pei)(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)(tie)(tie)等(deng)。
配重塊結(jie)構設(she)計(ji)除應(ying)(ying)符合機器(qi)設(she)備本身的(de)要求和機械加工(gong)工(gong)藝(yi)性的(de)要求外(wai),還(huan)應(ying)(ying)符合鑄造工(gong)藝(yi)的(de)要求,配重塊(kuai)的(de)結(jie)構設(she)計(ji)應(ying)(ying)注意以下幾點(dian):
一(yi)、要便于制(zhi)造模型、芯盒和造型:
1)配重(zhong)塊的外形(xing)應力求(qiu)簡單(dan),以便于起模,應盡量使(shi)鑄造(zao)分(fen)型面為平(ping)面,且數目小(xiao);
2)配(pei)重塊的內腔應力求鑄造(zao)時(shi)不用(yong)或少用(yong)型芯,當(dang)采用(yong)型芯時(shi),應方(fang)便其(qi)支撐(cheng)、固定及排氣出砂,時(shi)應設有足(zu)夠(gou)的工藝孔;
3)對(dui)于(yu)配重塊內外側面及加強(qiang)肋等結(jie)構(gou),應在起(qi)模方(fang)向設有的結(jie)構(gou)斜度;
4)配(pei)重(zhong)塊上的凸臺部分(fen)與配(pei)重(zhong)鐵本體不應相差過大,好(hao)取同(tong)一高度,同(tong)一面上的距離較近的幾個(ge)凸臺,好(hao)連(lian)成整體的凸起部分(fen)。
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