導(dao)(dao)板(ban)用來引導(dao)(dao)軋(ya)件(jian)正確進出孔型，使軋(ya)件(jian)在(zai)水平方向不致左右偏(pian)斜(xie)和歪扭。裝(zhuang)入口處的(de)導(dao)(dao)板(ban)稱(cheng)入口導(dao)(dao)板(ban)，裝(zhuang)在(zai)出口處的(de)稱(cheng)為出口導(dao)(dao)板(ban)。有時把導(dao)(dao)板(ban)裝(zhuang)在(zai)導(dao)(dao)板(ban)盒中。

衛(wei)板(ban)(ban)安裝(zhuang)在出口(kou)側用來(lai)防(fang)止發(fa)生纏輥事(shi)故(gu)。下衛(wei)板(ban)(ban)裝(zhuang)在導(dao)板(ban)(ban)橫梁上(shang)。上(shang)衛(wei)板(ban)(ban)固(gu)定較難(nan)，而且它不(bu)像下衛(wei)板(ban)(ban)那樣工作可(ke)靠，其頂端可(ke)能因(yin)機架振動(dong)而離開軋(ya)輥，也可(ke)能因(yin)軋(ya)件(jian)撞在衛(wei)板(ban)(ban)尖上(shang)造成事(shi)故(gu)。在孔型設計時采用上(shang)壓(ya)，是避免這(zhe)種(zhong)麻煩的有效措施。

鋼(gang)(gang)板軋機(ji)不用(yong)(yong)導(dao)板，它的(de)(de)衛板又叫護板。開坯軋機(ji)可采用(yong)(yong)整(zheng)體鑄造的(de)(de)導(dao)板。型鋼(gang)(gang)軋機(ji)也可采用(yong)(yong)適于幾個孔型的(de)(de)整(zheng)體導(dao)板。鋼(gang)(gang)管穿孔機(ji)的(de)(de)導(dao)板上下布置，與(yu)軋輥(gun)一起(qi)構成孔型并(bing)參與(yu)變形。

連(lian)軋(ya)(ya)(ya)(ya)棒材廠一(yi)車間粗(cu)軋(ya)(ya)(ya)(ya)機組是(shi)單輥傳動(dong)的(de)(de)二(er)輥水平(ping)(ping)布置的(de)(de)連(lian)軋(ya)(ya)(ya)(ya)機組，山東切分導衛(wei)，按工(gong)藝設計軋(ya)(ya)(ya)(ya)件需扭轉(zhuan)90°進入下(xia)(xia)一(yi)道次軋(ya)(ya)(ya)(ya)制，軋(ya)(ya)(ya)(ya)機的(de)(de)出(chu)(chu)口(kou)(kou)需設置扭轉(zhuan)裝置，切分導衛(wei)作用，引進的(de)(de)阿(a)希洛(luo)RS型(xing)滾動(dong)扭轉(zhuan)導衛(wei)(RS16C、RS12C兩(liang)種型(xing)號)，分別用在2#、4#、6#)機架出(chu)(chu)口(kou)(kou)上。在導衛(wei)的(de)(de)安裝與維(wei)修過程中，我發(fa)現下(xia)(xia)線(xian)的(de)(de)3種阿(a)希洛(luo)滾動(dong)導衛(wei)有三分之一(yi)的(de)(de)并沒有壞，其原因(yin)是(shi)扭轉(zhuan)角偏小(xiao)不能正確翻鋼(gang)，同時沖擊下(xia)(xia)一(yi)機架進口(kou)(kou)導衛(wei)而換下(xia)(xia)，這樣一(yi)來增加備件消耗(hao)和(he)軋(ya)(ya)(ya)(ya)鋼(gang)工(gong)及維(wei)修工(gong)的(de)(de)勞動(dong)強度。平(ping)(ping)均(jun)每月沖跑(pao)鋼(gang)10條，誤時200多分種。

新型結構(gou)導(dao)衛(wei)(wei)(wei)(wei)(wei)板(ban)(ban)采用(yong)兩次鑄造工(gong)(gong)(gong)藝，切分(fen)導(dao)衛(wei)(wei)(wei)(wei)(wei)多少錢，將耐(nai)磨合(he)(he)金(jin)(jin)(jin)部(bu)分(fen)與普通鑄鋼基沐(mu)，通過(guo)鑄造熔合(he)(he)，組成一個(ge)整(zheng)體(ti)導(dao)衛(wei)(wei)(wei)(wei)(wei)板(ban)(ban)。該工(gong)(gong)(gong)藝具(ju)有以下優點:①耐(nai)磨合(he)(he)金(jin)(jin)(jin)的使用(yong)量比(bi)整(zheng)體(ti)式導(dao)衛(wei)(wei)(wei)(wei)(wei)板(ban)(ban)減少90%以上，節約了(le)貴重的Ni、Cr等合(he)(he)金(jin)(jin)(jin)元素，降(jiang)低(di)了(le)成本;②與螺栓(shuan)連接的組合(he)(he)式導(dao)衛(wei)(wei)(wei)(wei)(wei)板(ban)(ban)相(xiang)比(bi)，省去了(le)切削加工(gong)(gong)(gong)、鉆孔(kong)、攻絲等加工(gong)(gong)(gong)工(gong)(gong)(gong)序(xu)，切分(fen)導(dao)衛(wei)(wei)(wei)(wei)(wei)總成，解決了(le)合(he)(he)金(jin)(jin)(jin)鑄鐵難加工(gong)(gong)(gong)的困難，使用(yong)維修方便，降(jiang)低(di)了(le)工(gong)(gong)(gong)人的勞動強度(du)，③新型結構(gou)導(dao)衛(wei)(wei)(wei)(wei)(wei)板(ban)(ban)的壽命不低(di)于整(zheng)體(ti)式耐(nai)磨合(he)(he)金(jin)(jin)(jin)導(dao)衛(wei)(wei)(wei)(wei)(wei)板(ban)(ban)