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鑄鐵配重塊是用(yong)于增(zeng)加自身重(zhong)量來保持(chi)平(ping)衡的重(zhong)物(wu),是將噴(pen)丸(wan)機(ji)熔煉成符合(he) 要求的液體并澆(jiao)進鑄型里(li),經冷卻凝固、清整處理后得(de)到有預(yu)定形狀、尺寸和(he)性能的鑄件的工藝過(guo)程。現代機(ji)械制(zhi)造工業(ye)的基(ji)礎工藝之一。
工(gong)作面(mian)(mian)小范(fan)圍內的(de)局部(bu)變化是(shi)指加(jia)工(gong)表(biao)面(mian)(mian)不平(ping)(ping)(ping)整,有變形(xing),灰口(kou)鐵可以看作是(shi)鋼的(de)基體與(yu)片(pian)狀(zhuang)石(shi)墨的(de)夾雜。因此石(shi)墨片(pian)越(yue)少(shao),越(yue)細,為(wei)了(le)保證(zheng)鑄鐵在(zai)澆(jiao)鑄能夠(gou)得到灰口(kou),且不至(zhi)于得到過(guo)多和粗(cu)大的(de)石(shi)墨片(pian),這里所說的(de)工(gong)作面(mian)(mian)小范(fan)圍,對(dui)小鑄鐵平(ping)(ping)(ping)板(ban)(ban)而言是(shi)局部(bu)位置,對(dui)大鑄鐵平(ping)(ping)(ping)板(ban)(ban)而言是(shi)局部(bu)面(mian)(mian)積。鑄鐵平(ping)(ping)(ping)板(ban)(ban)的(de)平(ping)(ping)(ping)整性反映了(le)鑄鐵平(ping)(ping)(ping)板(ban)(ban)局部(bu)誤差鑄鐵平(ping)(ping)(ping)板(ban)(ban)的(de)局部(bu)誤差是(shi)指鑄鐵平(ping)(ping)(ping)板(ban)(ban)工(gong)作面(mian)(mian)局部(bu)平(ping)(ping)(ping)面(mian)(mian)度(du)加(jia)工(gong)質(zhi)量,即表(biao)面(mian)(mian)粗(cu)糙度(du)。
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,造型(xing)造芯(xin)都實現了機(ji)械(xie)化(hua)或(huo)自動化(hua)。常用(yong)的砂型(xing)造型(xing)造芯(xin)設備有(you)高、中(zhong)、低壓(ya)造型(xing)機(ji)、拋砂機(ji)、無箱射壓(ya)造型(xing)機(ji)、射芯(xin)機(ji)、冷和熱芯(xin)盒機(ji)等。
叉車配重鐵(tie)(tie)工藝可分(fen)為(wei)三(san)個基本部分(fen),即配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)金(jin)(jin)屬(shu)(shu)(shu)準(zhun)備、鑄(zhu)(zhu)型準(zhun)備和鑄(zhu)(zhu)件(jian)處(chu)理。 配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)金(jin)(jin)屬(shu)(shu)(shu)是(shi)指配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)生產中用于(yu)澆(jiao)注鑄(zhu)(zhu)件(jian)的(de)金(jin)(jin)屬(shu)(shu)(shu)材(cai)料,它是(shi)以(yi)一種金(jin)(jin)屬(shu)(shu)(shu)元素為(wei)主(zhu)要(yao)成分(fen),并(bing)加入其他金(jin)(jin)屬(shu)(shu)(shu)或(huo)非金(jin)(jin)屬(shu)(shu)(shu)元素而(er)組成的(de)合(he)金(jin)(jin),習慣上稱為(wei)配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)合(he)金(jin)(jin),主(zhu)要(yao)有鑄(zhu)(zhu)鐵(tie)(tie)、鑄(zhu)(zhu)鋼和配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)有色合(he)金(jin)(jin)。叉車配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)按造型材(cai)料的(de)不(bu)同,又可分(fen)為(wei)兩大類:一類以(yi)天然礦產砂石作為(wei)主(zhu)要(yao)造型材(cai)料,如熔模配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)、殼型配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)、負壓(ya)配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)、泥型配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)、實型配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)、陶(tao)瓷型配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)等(deng);一類以(yi)金(jin)(jin)屬(shu)(shu)(shu)作為(wei)主(zhu)要(yao)鑄(zhu)(zhu)型材(cai)料,如金(jin)(jin)屬(shu)(shu)(shu)型配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)、離心配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)、連續(xu)配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)、叉車配(pei)(pei)件(jian)鐵(tie)(tie)、低壓(ya)配(pei)(pei)重(zhong)(zhong)(zhong)鐵(tie)(tie)等(deng)。
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