汽車的(de)車門下部外飾板(ban)(ban)是通過(guo)卡(ka)扣與鈑金件卡(ka)接(jie)在一(yi)起,外飾板(ban)(ban)的(de)邊緣位置與鈑金貼合,通過(guo)雙(shuang)面膠粘接(jie)固(gu)定。
1、汽(qi)車(che)覆蓋(gai)(gai)件(jian)(簡(jian)稱覆蓋(gai)(gai)件(jian))是指構成(cheng)汽(qi)車(che)車(che)身或駕駛室、覆蓋(gai)(gai)發動(dong)機(ji)和(he)底(di)盤(pan)的異形體表面和(he)內部的汽(qi)車(che)零(ling)件(jian)。汽(qi)車(che)覆蓋(gai)(gai)件(jian)既是外觀(guan)裝飾性的零(ling)件(jian),又(you)是封閉薄殼狀的受力零(ling)件(jian);
2、覆(fu)蓋件表面(mian)上任何(he)微小(xiao)的(de)缺陷都會(hui)在涂漆后引起光(guang)線的(de)漫反射(she)而(er)損壞(huai)外(wai)形的(de)美(mei)觀,因此覆(fu)蓋件表面(mian)不(bu)允許(xu)有(you)波紋、皺折、邊緣(yuan)拉痕和其他(ta)破壞(huai)表面(mian)美(mei)感(gan)的(de)缺陷。歐、美(mei)、日(ri)等發達國家生產(chan)的(de)A級表面(mian)精度的(de)汽車(che)覆(fu)蓋件有(you)引擎(qing)蓋板(ban);
3、車(che)(che)頂(ding)蓋(gai),左(zuo)、右車(che)(che)側圍(wei)(wei),前(qian)(qian)(qian)、后(hou)(hou)車(che)(che)門,前(qian)(qian)(qian)、后(hou)(hou)、左(zuo)、右翼(yi)子板(ban)(ban)(ban),行禮箱蓋(gai)板(ban)(ban)(ban),發動機(ji)前(qian)(qian)(qian)支撐(cheng)板(ban)(ban)(ban),發動機(ji)前(qian)(qian)(qian)裙板(ban)(ban)(ban),前(qian)(qian)(qian)圍(wei)(wei)上(shang)蓋(gai)板(ban)(ban)(ban),后(hou)(hou)圍(wei)(wei)板(ban)(ban)(ban),后(hou)(hou)圍(wei)(wei)上(shang)蓋(gai)板(ban)(ban)(ban),前(qian)(qian)(qian)裙板(ban)(ban)(ban),前(qian)(qian)(qian)框架,前(qian)(qian)(qian)翼(yi)子板(ban)(ban)(ban),車(che)(che)輪擋泥(ni)(ni)板(ban)(ban)(ban)、后(hou)(hou)翼(yi)子板(ban)(ban)(ban)、后(hou)(hou)圍(wei)(wei)板(ban)(ban)(ban)、行李倉蓋(gai),后(hou)(hou)圍(wei)(wei)上(shang)蓋(gai)板(ban)(ban)(ban)、頂(ding)蓋(gai)、前(qian)(qian)(qian)圍(wei)(wei)側板(ban)(ban)(ban)、前(qian)(qian)(qian)圍(wei)(wei)板(ban)(ban)(ban)、前(qian)(qian)(qian)圍(wei)(wei)上(shang)蓋(gai)板(ban)(ban)(ban)、前(qian)(qian)(qian)擋泥(ni)(ni)板(ban)(ban)(ban)、發動機(ji)罩。覆蓋(gai)件的制造是汽車(che)(che)車(che)(che)身制造的關鍵環(huan)節。
前(qian)圍(wei)板(ban)(ban)是指發動機艙(cang)與車(che)廂之(zhi)(zhi)間的(de)(de)(de)隔(ge)板(ban)(ban),它和地板(ban)(ban)、前(qian)立柱聯接(jie),安(an)裝(zhuang)在前(qian)圍(wei)上(shang)蓋(gai)板(ban)(ban)之(zhi)(zhi)下。前(qian)圍(wei)板(ban)(ban)上(shang)有(you)許(xu)多孔口,作(zuo)為(wei)操縱用的(de)(de)(de)拉(la)線、拉(la)桿、管(guan)路和電線束通過之(zhi)(zhi)用,還要(yao)配合踏板(ban)(ban)、方向機柱等機件(jian)(jian)安(an)裝(zhuang)位(wei)置(zhi)。為(wei)防止發動機艙(cang)里的(de)(de)(de)廢氣、高溫、噪聲竄入車(che)廂,前(qian)圍(wei)板(ban)(ban)上(shang)要(yao)有(you)密(mi)封措施(shi)和隔(ge)熱(re)裝(zhuang)置(zhi)。在發生意外事故時,它應具有(you)足夠(gou)的(de)(de)(de)強度(du)和剛(gang)度(du)。對比(bi)車(che)身其它部件(jian)(jian)而言,前(qian)圍(wei)板(ban)(ban)裝(zhuang)配最(zui)重(zhong)要(yao)的(de)(de)(de)工藝技(ji)術(shu)是密(mi)封和隔(ge)熱(re),它的(de)(de)(de)優劣往(wang)(wang)往(wang)(wang)反映了車(che)輛運(yun)行的(de)(de)(de)質量(liang)。
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