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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)(xin)都實現(xian)了(le)機(ji)械化(hua)(hua)或自動化(hua)(hua)。常用(yong)的(de)砂型造(zao)型造(zao)芯(xin)(xin)設備有高、中、低(di)壓造(zao)型機(ji)、拋砂機(ji)、無箱射壓造(zao)型機(ji)、射芯(xin)(xin)機(ji)、冷(leng)和(he)熱芯(xin)(xin)盒(he)機(ji)等。
叉車配重鐵(tie)(tie)(tie)工藝可分(fen)(fen)為(wei)(wei)三個(ge)基本部分(fen)(fen),即配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)金(jin)屬(shu)(shu)準(zhun)備(bei)(bei)、鑄(zhu)型(xing)(xing)(xing)準(zhun)備(bei)(bei)和鑄(zhu)件(jian)處理(li)。 配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)金(jin)屬(shu)(shu)是(shi)指配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)生產(chan)中用于澆注鑄(zhu)件(jian)的金(jin)屬(shu)(shu)材料,它是(shi)以一(yi)種金(jin)屬(shu)(shu)元(yuan)素(su)為(wei)(wei)主要(yao)成分(fen)(fen),并(bing)加入其他金(jin)屬(shu)(shu)或非金(jin)屬(shu)(shu)元(yuan)素(su)而(er)組(zu)成的合(he)(he)金(jin),習(xi)慣(guan)上稱為(wei)(wei)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)合(he)(he)金(jin),主要(yao)有鑄(zhu)鐵(tie)(tie)(tie)、鑄(zhu)鋼和配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)有色合(he)(he)金(jin)。叉(cha)車配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)按造型(xing)(xing)(xing)材料的不同,又可分(fen)(fen)為(wei)(wei)兩大(da)類(lei):一(yi)類(lei)以天(tian)然(ran)礦產(chan)砂石作為(wei)(wei)主要(yao)造型(xing)(xing)(xing)材料,如(ru)熔模配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、殼型(xing)(xing)(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、負壓(ya)(ya)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、泥型(xing)(xing)(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、實型(xing)(xing)(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、陶瓷型(xing)(xing)(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)等;一(yi)類(lei)以金(jin)屬(shu)(shu)作為(wei)(wei)主要(yao)鑄(zhu)型(xing)(xing)(xing)材料,如(ru)金(jin)屬(shu)(shu)型(xing)(xing)(xing)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、離心配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、連(lian)續配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)、叉(cha)車配(pei)(pei)件(jian)鐵(tie)(tie)(tie)、低壓(ya)(ya)配(pei)(pei)重(zhong)(zhong)(zhong)(zhong)(zhong)鐵(tie)(tie)(tie)等。
配重塊結(jie)構設(she)(she)計除應(ying)(ying)符合機(ji)器設(she)(she)備本身(shen)的(de)要求和機(ji)械加工工藝性的(de)要求外,還應(ying)(ying)符合鑄(zhu)造(zao)工藝的(de)要求,配重塊的(de)結(jie)構設(she)(she)計應(ying)(ying)注意(yi)以下幾點:
一、要便于制造(zao)模型(xing)、芯(xin)盒和造(zao)型(xing):
1)配重塊的外形應力求簡單,以(yi)便于(yu)起模,應盡量(liang)使鑄造分型面為平面,且(qie)數目小;
2)配重塊的內腔應力求鑄造時不用或(huo)少用型芯,當采用型芯時,應方便(bian)其支撐、固定及(ji)排氣出砂,時應設有足(zu)夠的工藝孔(kong);
3)對于配重塊內(nei)外側面(mian)及加強(qiang)肋等結構(gou),應在起模方向設有的結構(gou)斜度(du);
4)配重(zhong)塊上(shang)的(de)(de)凸(tu)臺部分(fen)與配重(zhong)鐵本體不(bu)應相差過大(da),好取同(tong)一高度,同(tong)一面上(shang)的(de)(de)距離較近的(de)(de)幾個凸(tu)臺,好連成整體的(de)(de)凸(tu)起(qi)部分(fen)。
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