不銹(xiu)(xiu)鋼(gang)(gang)瓦楞形板(ban)是(shi)不銹(xiu)(xiu)鋼(gang)(gang)寬(kuan)幅(fu)型鋼(gang)(gang)的一種，由于其(qi)形狀(zhuang)如同頂(ding)上用瓦片鋪成的行列隆起(qi)部分，故稱為(wei)香蕉視頻app蘋果:不銹鋼瓦楞形(xing)板，如圖5-37所示。

 人們過去常見(jian)的(de)(de)“瓦(wa)楞(leng)（形(xing)）板(ban)”大都(dou)是(shi)用普通低碳鋼，也就是(shi)非(fei)合金(jin)鋼材(cai)(cai)(cai)料(liao)制成(cheng)的(de)(de)（見(jian)圖5-38),還有用非(fei)金(jin)屬材(cai)(cai)(cai)料(liao)如石(shi)棉(mian)、塑料(liao)、紙板(ban)等(deng)制成(cheng)的(de)(de)瓦(wa)楞(leng)形(xing)板(ban)。這些瓦(wa)楞(leng)形(xing)板(ban)主(zhu)要(yao)(yao)用于建筑領域(yu)的(de)(de)屋頂材(cai)(cai)(cai)料(liao)、外(wai)(wai)墻材(cai)(cai)(cai)料(liao)和(he)各(ge)種(zhong)包裝箱體的(de)(de)外(wai)(wai)形(xing)材(cai)(cai)(cai)料(liao)和(he)產品包裝箱、盒等(deng)，之所以做成(cheng)瓦(wa)楞(leng)形(xing)狀(zhuang)，主(zhu)要(yao)(yao)目(mu)的(de)(de)是(shi)增加結構剛度(du)和(he)穩定性。因(yin)此，其尺寸精度(du)和(he)表面質(zhi)量要(yao)(yao)求及材(cai)(cai)(cai)質(zhi)要(yao)(yao)求都(dou)不是(shi)很高(gao)。

 此處介(jie)紹的(de)(de)(de)(de)(de)不(bu)(bu)銹鋼(gang)(gang)瓦(wa)(wa)(wa)楞(leng)形(xing)板(ban)與普通(tong)(tong)的(de)(de)(de)(de)(de)“瓦(wa)(wa)(wa)楞(leng)（形(xing)）板(ban)”有(you)著本質(zhi)(zhi)的(de)(de)(de)(de)(de)不(bu)(bu)同，首(shou)先材(cai)料是不(bu)(bu)銹鋼(gang)(gang)，無疑要(yao)(yao)比(bi)普通(tong)(tong)的(de)(de)(de)(de)(de)“瓦(wa)(wa)(wa)楞(leng)（形(xing)）板(ban)”具(ju)有(you)更(geng)高的(de)(de)(de)(de)(de)強(qiang)度、良好(hao)的(de)(de)(de)(de)(de)耐腐蝕(shi)性能(neng)和(he)極(ji)好(hao)的(de)(de)(de)(de)(de)裝飾效果，另外在(zai)結構上也(ye)大不(bu)(bu)相同。這些都賦予了不(bu)(bu)銹鋼(gang)(gang)瓦(wa)(wa)(wa)楞(leng)形(xing)板(ban)不(bu)(bu)僅具(ju)有(you)普通(tong)(tong)“瓦(wa)(wa)(wa)楞(leng)形(xing)板(ban)”的(de)(de)(de)(de)(de)各(ge)種(zhong)功(gong)能(neng)與作用，而且(qie)具(ju)有(you)普通(tong)(tong)“瓦(wa)(wa)(wa)楞(leng)（形(xing)）板(ban)”沒有(you)的(de)(de)(de)(de)(de)功(gong)能(neng)，即不(bu)(bu)銹鋼(gang)(gang)瓦(wa)(wa)(wa)楞(leng)形(xing)板(ban)可以作為傳(chuan)(chuan)熱元(yuan)(yuan)件使用。作為傳(chuan)(chuan)熱元(yuan)(yuan)件，對其各(ge)方面(mian)的(de)(de)(de)(de)(de)要(yao)(yao)求(qiu)就比(bi)普通(tong)(tong)“瓦(wa)(wa)(wa)楞(leng)（形(xing)）板(ban)”高得多(duo)，特別(bie)是對瓦(wa)(wa)(wa)楞(leng)形(xing)板(ban)表觀的(de)(de)(de)(de)(de)要(yao)(yao)求(qiu)。對瓦(wa)(wa)(wa)楞(leng)形(xing)板(ban)表觀的(de)(de)(de)(de)(de)要(yao)(yao)求(qiu)主要(yao)(yao)體(ti)現(xian)在(zai)對外形(xing)尺寸(cun)和(he)表面(mian)質(zhi)(zhi)量(liang)的(de)(de)(de)(de)(de)要(yao)(yao)求(qiu)上。因此，采(cai)用何種(zhong)方式、何種(zhong)工藝加(jia)工生(sheng)產(chan)不(bu)(bu)銹鋼(gang)(gang)瓦(wa)(wa)(wa)楞(leng)形(xing)板(ban)就成(cheng)為保證其外形(xing)尺寸(cun)和(he)質(zhi)(zhi)量(liang)的(de)(de)(de)(de)(de)關鍵。其他性能(neng)（機(ji)械性能(neng)、耐腐蝕(shi)性能(neng)和(he)焊接性能(neng)）主要(yao)(yao)取決于所選用的(de)(de)(de)(de)(de)材(cai)料。

1. 不銹(xiu)鋼(gang)瓦楞形(xing)板外形(xing)尺寸(cun)

 從圖5-37和圖5-39可以(yi)看出不銹鋼(gang)瓦(wa)楞形板的(de)外表形狀是有(you)規律(lv)、周期性變化的(de)，而且彎曲(qu)深(shen)度(du)(du)較小、形狀單一，不僅(jin)有(you)橫向波(bo)紋，而且還有(you)縱向波(bo)紋。所以(yi)說，其形狀既簡單又復雜，簡單是指形狀單一，有(you)規律(lv)；復雜是指不僅(jin)有(you)橫向波(bo)紋，而且還有(you)縱向波(bo)紋。這就給不銹鋼(gang)瓦(wa)楞形板的(de)成型(xing)帶來不小的(de)難度(du)(du)，在成型(xing)工(gong)藝上(shang)必須采取相(xiang)應的(de)工(gong)藝措施和手段，方能保證獲得要求的(de)外形尺寸和成型(xing)質量。

 圖5-39是不銹鋼瓦楞(leng)(leng)形板的(de)(de)實物照片(pian)，從(cong)圖片(pian)可以(yi)看出(chu)，不銹鋼瓦楞(leng)(leng)形板的(de)(de)外表(biao)和形狀(zhuang)是非常美觀、漂亮的(de)(de)，具有(you)較(jiao)高的(de)(de)觀賞性，如同(tong)工藝品、裝(zhuang)飾(shi)品。

 圖5-39不銹鋼瓦楞形(xing)板A-A截(jie)面尺(chi)寸(cun)，見圖5-40,B-B截(jie)面尺(chi)寸(cun)，見圖5-41。

 不銹鋼(gang)瓦楞形板成品實物斷面圖片，見圖5-40(b)和圖5-41(b)。

 從(cong)圖5-40和圖5-41可以看出，不銹鋼(gang)瓦楞形板的(de)斷(duan)面(mian)變化的(de)規律(lv)是周(zhou)期(qi)性的(de)，斷(duan)面(mian)形狀是關于(yu)縱向中(zhong)心線(xian)為對(dui)稱(cheng)的(de)型鋼(gang)，彎曲深度較(jiao)淺(qian)，深度僅有7mm。

 不銹鋼(gang)瓦楞形板外形尺寸精度：截面最大邊長誤差≤0.3mm;圓角最大直徑：≤2.0mm;縱向、橫向彎曲(qu)度：每米≤1mm; 扭轉：每米≤1°。

2. 瓦楞形板橫向波(bo)紋的成型

 不(bu)銹鋼瓦楞形(xing)(xing)(xing)板輥(gun)式冷彎(wan)(wan)成型(xing)(xing)時，首先將(jiang)不(bu)銹鋼冷軋平板預彎(wan)(wan)曲(qu)鐓(dui)壓成弧形(xing)(xing)(xing)波紋，如圖(tu)5-42所示(shi)的(de)(de)第一架成型(xing)(xing)輥(gun)孔(kong)形(xing)(xing)(xing)的(de)(de)形(xing)(xing)(xing)狀(zhuang)。輥(gun)形(xing)(xing)(xing)的(de)(de)形(xing)(xing)(xing)狀(zhuang)為(wei)(wei)(wei)(wei)(wei)，向下彎(wan)(wan)曲(qu)的(de)(de)弧形(xing)(xing)(xing)直徑為(wei)(wei)(wei)(wei)(wei)Φ=265mm,向上彎(wan)(wan)曲(qu)的(de)(de)弧形(xing)(xing)(xing)直徑為(wei)(wei)(wei)(wei)(wei)Φ=164mm,帶鋼進入并通過如此輥(gun)型(xing)(xing)是毫不(bu)困難的(de)(de)，一個(ge)波長（周期）為(wei)(wei)(wei)(wei)(wei)83.40mm,弧深度(du)（垂直位(wei)移）為(wei)(wei)(wei)(wei)(wei)4.12mm,這個(ge)成型(xing)(xing)形(xing)(xing)(xing)狀(zhuang)無論是在變(bian)形(xing)(xing)(xing)寬(kuan)度(du)上，還是變(bian)形(xing)(xing)(xing)深度(du)上都是可行的(de)(de)和(he)符合要求的(de)(de)。一個(ge)波長（周期）橫向位(wei)移（減寬(kuan)量）為(wei)(wei)(wei)(wei)(wei)0.60mm,相對減寬(kuan)率（橫向位(wei)移）為(wei)(wei)(wei)(wei)(wei)0.71%,見圖(tu)5-42,如此的(de)(de)位(wei)移（減寬(kuan)量）不(bu)會對鐓(dui)壓成型(xing)(xing)造(zao)成困難和(he)產生成型(xing)(xing)缺(que)陷，這些都為(wei)(wei)(wei)(wei)(wei)第二架成型(xing)(xing)輥(gun)再(zai)鐓(dui)壓創造(zao)了條(tiao)件。

 第(di)二(er)架(jia)(jia)成(cheng)(cheng)型(xing)(xing)輥(gun)在(zai)第(di)一(yi)(yi)架(jia)(jia)成(cheng)(cheng)型(xing)(xing)輥(gun)的(de)鐓(dui)壓(ya)(ya)(ya)(ya)基(ji)礎上，再次鐓(dui)壓(ya)(ya)(ya)(ya)，使其達(da)(da)(da)到如圖5-42所(suo)示的(de)孔形(xing)(xing)形(xing)(xing)狀(zhuang)，弧(hu)度直徑(jing)分別為(wei)(wei)(wei)Φ=133mm和(he)p=82mm,一(yi)(yi)個(ge)波長(chang)（周(zhou)期(qi)）為(wei)(wei)(wei)81.70mm、弧(hu)深度為(wei)(wei)(wei)8.18mm,這(zhe)就是說(shuo)寬度和(he)深度更接近(jin)于成(cheng)(cheng)品(pin)形(xing)(xing)狀(zhuang)，而(er)相對(dui)減(jian)(jian)寬量(liang)（水(shui)平位移(yi)(yi)）僅為(wei)(wei)(wei)1.42mm,相對(dui)減(jian)(jian)寬率（水(shui)平方向(xiang)）為(wei)(wei)(wei)1.7%,要(yao)比第(di)一(yi)(yi)道次大(da)了(le)許多，這(zhe)是符合開(kai)始小一(yi)(yi)些、中間(jian)大(da)一(yi)(yi)些的(de)成(cheng)(cheng)型(xing)(xing)規律要(yao)求的(de)，見第(di)三架(jia)(jia)成(cheng)(cheng)型(xing)(xing)輥(gun)在(zai)第(di)二(er)架(jia)(jia)成(cheng)(cheng)型(xing)(xing)輥(gun)的(de)鐓(dui)壓(ya)(ya)(ya)(ya)基(ji)礎上，再鐓(dui)壓(ya)(ya)(ya)(ya)，使其達(da)(da)(da)到如圖5-42所(suo)示的(de)孔形(xing)(xing)形(xing)(xing)狀(zhuang)，這(zhe)時(shi)將已經(jing)成(cheng)(cheng)型(xing)(xing)的(de)弧(hu)形(xing)(xing)瓦(wa)楞(leng)形(xing)(xing)鐓(dui)壓(ya)(ya)(ya)(ya)成(cheng)(cheng)梯(ti)形(xing)(xing)狀(zhuang)瓦(wa)楞(leng)形(xing)(xing)，而(er)一(yi)(yi)個(ge)波長(chang)（周(zhou)期(qi)）為(wei)(wei)(wei)80mm,相對(dui)減(jian)(jian)寬量(liang)（水(shui)平位移(yi)(yi)）僅為(wei)(wei)(wei)2.28mm,一(yi)(yi)個(ge)波長(chang)（周(zhou)期(qi)）相對(dui)減(jian)(jian)寬率（水(shui)平方向(xiang)）為(wei)(wei)(wei)2.79%.通(tong)過鐓(dui)壓(ya)(ya)(ya)(ya)使弧(hu)深由8.18mm減(jian)(jian)小為(wei)(wei)(wei)7.00mm,這(zhe)樣可使梯(ti)形(xing)(xing)成(cheng)(cheng)型(xing)(xing)更加精確到位，為(wei)(wei)(wei)最后(hou)沖(chong)壓(ya)(ya)(ya)(ya)成(cheng)(cheng)型(xing)(xing)達(da)(da)(da)到成(cheng)(cheng)品(pin)形(xing)(xing)狀(zhuang)及尺(chi)寸奠定良好的(de)基(ji)礎，此(ci)時(shi)，橫向(xiang)鐓(dui)壓(ya)(ya)(ya)(ya)成(cheng)(cheng)型(xing)(xing)已全部完成(cheng)(cheng)，隨(sui)后(hou)將采用沖(chong)壓(ya)(ya)(ya)(ya)成(cheng)(cheng)型(xing)(xing)輥(gun)在(zai)已成(cheng)(cheng)型(xing)(xing)橫向(xiang)波紋(wen)上完成(cheng)(cheng)最終(zhong)成(cheng)(cheng)型(xing)(xing)。

 圖5-42是(shi)各架次(ci)成(cheng)型輥輥形尺寸(cun)圖。

 第三(san)(san)架成(cheng)型(xing)輥(gun)(gun)輥(gun)(gun)形(xing)圖(tu)(tu)和孔形(xing)圖(tu)(tu)，見(jian)圖(tu)(tu)5-43.第三(san)(san)架成(cheng)型(xing)輥(gun)(gun)應(ying)是由多片(pian)輥(gun)(gun)片(pian)疊加(jia)組(zu)合而成(cheng)的(de)(de)組(zu)合輥(gun)(gun)，輥(gun)(gun)片(pian)的(de)(de)水(shui)平(ping)段(duan)(duan)和圓(yuan)(yuan)弧(hu)(hu)段(duan)(duan)采取與板(ban)材接觸(chu)的(de)(de)方式，而傾斜段(duan)(duan)則采取與板(ban)材不接觸(chu)的(de)(de)方式，為的(de)(de)是減少(shao)成(cheng)型(xing)表面的(de)(de)擦劃傷，此外，如此結構也將便于(yu)成(cheng)型(xing)輥(gun)(gun)的(de)(de)加(jia)工和隨后的(de)(de)使用與維護(hu)等。上、下(xia)輥(gun)(gun)斜角(jiao)采取圓(yuan)(yuan)弧(hu)(hu)過(guo)渡(du)，一般(ban)情況下(xia)，圓(yuan)(yuan)弧(hu)(hu)的(de)(de)直(zhi)(zhi)徑(jing)應(ying)大(da)于(yu)板(ban)厚，所以圖(tu)(tu)5-43所示的(de)(de)第三(san)(san)架上、下(xia)輥(gun)(gun)斜角(jiao)的(de)(de)圓(yuan)(yuan)弧(hu)(hu)過(guo)渡(du)直(zhi)(zhi)徑(jing)為2.0mm,見(jian)圖(tu)(tu)5-43局部放大(da)圖(tu)(tu)。

3. 縱向波(bo)紋的成型(xing)

 縱(zong)向(xiang)波(bo)紋(wen)的(de)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)是在橫(heng)向(xiang)波(bo)紋(wen)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)之后的(de)橫(heng)向(xiang)波(bo)紋(wen)上成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)的(de)。所(suo)以在已成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)的(de)波(bo)紋(wen)上再成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)縱(zong)向(xiang)波(bo)紋(wen)是有(you)難度的(de)。其難度主要表現為，可能破壞已成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)的(de)橫(heng)向(xiang)波(bo)紋(wen)，而且縱(zong)向(xiang)波(bo)紋(wen)也成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)不好(hao)。選用何種方式(shi)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)就(jiu)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)為縱(zong)向(xiang)波(bo)紋(wen)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)的(de)關鍵。

 沖(chong)壓(ya)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)輥(gun)(gun)(gun)就是(shi)在(zai)一對成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)輥(gun)(gun)(gun)上(shang)，按(an)工藝和(he)(he)產品的(de)(de)(de)要求，在(zai)要面上(shang)間隙分(fen)布著凸(tu)起和(he)(he)凹陷(xian)的(de)(de)(de)部(bu)分(fen)，用(yong)于(yu)(yu)壓(ya)制成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)瓦楞(leng)形(xing)(xing)板的(de)(de)(de)縱向(xiang)(xiang)波(bo)(bo)紋(wen)，同時又不能損(sun)壞已成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)橫(heng)向(xiang)(xiang)梯形(xing)(xing)波(bo)(bo)紋(wen)，縱向(xiang)(xiang)波(bo)(bo)紋(wen)尺(chi)(chi)寸圖(tu)(tu)(tu)(tu)及(ji)實物圖(tu)(tu)(tu)(tu)片(pian)，見圖(tu)(tu)(tu)(tu)5-40和(he)(he)圖(tu)(tu)(tu)(tu)5-41。之所以(yi)將沖(chong)壓(ya)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)輥(gun)(gun)(gun)置于(yu)(yu)橫(heng)向(xiang)(xiang)波(bo)(bo)紋(wen)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)輥(gun)(gun)(gun)后、平整輥(gun)(gun)(gun)前(qian)，是(shi)為了保證瓦楞(leng)形(xing)(xing)板的(de)(de)(de)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)過程(cheng)的(de)(de)(de)穩定(ding)和(he)(he)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)質量。可(ke)以(yi)想象，在(zai)沒有橫(heng)向(xiang)(xiang)波(bo)(bo)紋(wen)的(de)(de)(de)平板帶材上(shang)沖(chong)壓(ya)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)凸(tu)起和(he)(he)凹陷(xian)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)材，由于(yu)(yu)自(zi)由度大(da)沒有約束(shu)力，沖(chong)壓(ya)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)會(hui)造成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)坯料局部(bu)收縮，產生皺(zhou)折及(ji)其(qi)(qi)他缺陷(xian)，影響(xiang)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)質量和(he)(he)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)品的(de)(de)(de)尺(chi)(chi)寸。另外，瓦楞(leng)形(xing)(xing)板型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)鋼截面受材料內部(bu)殘余應力作用(yong)，很容易產生扭轉，這(zhe)也(ye)會(hui)影響(xiang)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)過程(cheng)的(de)(de)(de)穩定(ding)性。但在(zai)瓦楞(leng)形(xing)(xing)板橫(heng)向(xiang)(xiang)波(bo)(bo)紋(wen)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)輥(gun)(gun)(gun)后、平整輥(gun)(gun)(gun)前(qian)，再用(yong)沖(chong)壓(ya)輥(gun)(gun)(gun)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)其(qi)(qi)縱向(xiang)(xiang)波(bo)(bo)紋(wen)，此時，已成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)的(de)(de)(de)橫(heng)向(xiang)(xiang)波(bo)(bo)紋(wen)使瓦楞(leng)形(xing)(xing)板的(de)(de)(de)剛度增大(da)，同時又受到成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)輥(gun)(gun)(gun)和(he)(he)平整輥(gun)(gun)(gun)的(de)(de)(de)約束(shu)，其(qi)(qi)自(zi)由度就減小。以(yi)上(shang)這(zhe)些都(dou)可(ke)以(yi)有效地防止局部(bu)收縮和(he)(he)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)鋼的(de)(de)(de)扭轉，從(cong)而對保證瓦楞(leng)形(xing)(xing)板的(de)(de)(de)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)型(xing)(xing)(xing)(xing)(xing)(xing)(xing)(xing)及(ji)質量起到有效的(de)(de)(de)保障作用(yong)。瓦楞(leng)形(xing)(xing)板橫(heng)向(xiang)(xiang)波(bo)(bo)紋(wen)沖(chong)壓(ya)輥(gun)(gun)(gun)的(de)(de)(de)示意圖(tu)(tu)(tu)(tu)，見圖(tu)(tu)(tu)(tu)5-44。

 沖壓成型(xing)輥也(ye)應做成組(zu)合式輥子，即由多輥片疊加(jia)(jia)組(zu)合而成。這種形式的輥子便于(yu)加(jia)(jia)工和維護，調整使用方便。