常(chang)用(yong)的(de)工字鋼型號有哪些(xie)？

工字鋼的規格

工字(zi)鋼(gang)(gang)的(de)(de)規格是用腰寬的(de)(de)厘米(mi)值來表示的(de)(de)，如(ru)10號工字(zi)鋼(gang)(gang)，其腰寬為10cm.工字(zi)鋼(gang)(gang)的(de)(de)品(pin)種有(you)熱軋普通工字(zi)鋼(gang)(gang)、輕(qing)型(xing)(xing)工字(zi)鋼(gang)(gang)和(he)寬平(ping)行腿(tui)工字(zi)鋼(gang)(gang)（H型(xing)(xing)鋼(gang)(gang)）。我(wo)國熱軋普通工字(zi)鋼(gang)(gang)的(de)(de)腰寬為100~630mm,表示為No.10~No.63,腿(tui)內(nei)側(ce)壁斜度為1:6.軋制工字(zi)鋼(gang)(gang)的(de)(de)孔型(xing)(xing)系統(tong)(tong)有(you)直軋孔型(xing)(xing)系統(tong)(tong)、斜軋孔型(xing)(xing)系統(tong)(tong)和(he)混合孔型(xing)(xing)系統(tong)(tong)。

軋制(zhi)工字鋼的孔型系統

直軋孔(kong)型系統(tong)

直軋(ya)(ya)孔型(xing)(xing)系統是指(zhi)工字鋼孔型(xing)(xing)的兩(liang)個啟齒腿同(tong)時處于軋(ya)(ya)輥(gun)軸(zhou)(zhou)線(xian)的同(tong)一側，腰與軋(ya)(ya)輥(gun)軸(zhou)(zhou)線(xian)平行的孔型(xing)(xing)系統。其優(you)點是軋(ya)(ya)輥(gun)軸(zhou)(zhou)向力小，軸(zhou)(zhou)向竄動小，不需工作斜面，孔型(xing)(xing)占(zhan)用輥(gun)身(shen)長度小，在輥(gun)身(shen)長度一定的條件下(xia)可多配孔型(xing)(xing)。

斜(xie)軋孔(kong)型系統

這種孔(kong)(kong)(kong)型(xing)系統是指工字鋼孔(kong)(kong)(kong)型(xing)的兩個(ge)啟齒腿不同時處(chu)于腰(yao)部(bu)的同一側(ce)，腰(yao)與程度(du)軸線有(you)一夾(jia)角。混(hun)合(he)孔(kong)(kong)(kong)型(xing)系統。依(yi)據軋(ya)(ya)機和產品的特性，為充沛發揮各自系統的優點，克制(zhi)缺陷，常(chang)常(chang)采用混(hun)合(he)孔(kong)(kong)(kong)型(xing)系統，即兩種以上系統的組合(he)。如廢(fei)品孔(kong)(kong)(kong)和廢(fei)品前孔(kong)(kong)(kong)采用直腿斜(xie)軋(ya)(ya)孔(kong)(kong)(kong)型(xing)系統，其他孔(kong)(kong)(kong)型(xing)采用彎腿斜(xie)軋(ya)(ya)系統；或者(zhe)粗軋(ya)(ya)孔(kong)(kong)(kong)采用直軋(ya)(ya)系統，.后3~4個(ge)精軋(ya)(ya)孔(kong)(kong)(kong)采用直腿斜(xie)扎孔(kong)(kong)(kong)等。

特殊軋法

特殊軋法

由于某種緣(yuan)由采用(yong)(yong)通常的軋制(zhi)辦法難以(yi)軋出請求(qiu)的工(gong)(gong)字鋼(gang)時，可(ke)采用(yong)(yong)特殊軋法，充沛應用(yong)(yong)不平均(jun)變形和孔型設計的技巧。例如，當(dang)鋼(gang)坯斷面(mian)較(jiao)窄(zhai)而請求(qiu)軋制(zhi)較(jiao)寬的工(gong)(gong)字鋼(gang)時，可(ke)采用(yong)(yong)波浪式軋法；又(you)如當(dang)坯料較(jiao)寬而請求(qiu)軋制(zhi)較(jiao)小號(hao)工(gong)(gong)字鋼(gang)時，可(ke)采用(yong)(yong)負寬展軋制(zhi)等。