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噴涂流水線前處理拋丸

時間(jian):2022-06-20點(dian)擊次(ci)數(shu):919

噴(pen)砂(sha)是(shi)一(yi)(yi)種(zhong)表(biao)面強(qiang)(qiang)化工(gong)藝,用(yong)(yong)噴(pen)丸(wan)來提高(gao)零(ling)(ling)件(jian)的(de)(de)(de)(de)(de)機(ji)(ji)(ji)械強(qiang)(qiang)度、耐磨性(xing)、抗疲(pi)(pi)勞性(xing)和(he)耐腐蝕(shi)性(xing)。也(ye)(ye)可用(yong)(yong)于(yu)(yu)鑄造、鍛造和(he)焊接(jie)零(ling)(ling)件(jian)的(de)(de)(de)(de)(de)表(biao)面消光、除(chu)垢(gou)和(he)消除(chu)殘余應(ying)力(li)(li)(li)(li)(li)。拋(pao)(pao)丸(wan)是(shi)一(yi)(yi)種(zhong)機(ji)(ji)(ji)械表(biao)面處理工(gong)藝。其原理是(shi)利用(yong)(yong)高(gao)速旋(xuan)轉(zhuan)的(de)(de)(de)(de)(de)葉輪甩出小(xiao)鋼球(qiu)或小(xiao)鐵(tie)球(qiu)來清(qing)潔零(ling)(ling)件(jian)表(biao)面,從而(er)提高(gao)外觀(guan)質量,使(shi)(shi)工(gong)件(jian)美觀(guan)。同時工(gong)件(jian)的(de)(de)(de)(de)(de)焊接(jie)拉應(ying)力(li)(li)(li)(li)(li)變(bian)為壓(ya)(ya)應(ying)力(li)(li)(li)(li)(li),延長了工(gong)件(jian)的(de)(de)(de)(de)(de)使(shi)(shi)用(yong)(yong)壽(shou)(shou)命。常用(yong)(yong)的(de)(de)(de)(de)(de)球(qiu)(包括鑄球(qiu)、切球(qiu)和(he)不銹鋼球(qiu)等(deng)。直(zhi)徑(jing)在0.23.0之間。拋(pao)(pao)丸(wan)是(shi)將高(gao)速旋(xuan)轉(zhuan)的(de)(de)(de)(de)(de)葉輪噴(pen)出的(de)(de)(de)(de)(de)小(xiao)鋼丸(wan)或鐵(tie)丸(wan),以高(gao)速撞擊零(ling)(ling)件(jian)表(biao)面,從而(er)強(qiang)(qiang)化零(ling)(ling)件(jian)的(de)(de)(de)(de)(de)機(ji)(ji)(ji)械性(xing)能(neng)。噴(pen)砂(sha)也(ye)(ye)可用(yong)(yong)于(yu)(yu)修改零(ling)(ling)件(jian)表(biao)面。拋(pao)(pao)丸(wan)不僅(jin)是(shi)一(yi)(yi)種(zhong)表(biao)面處理,也(ye)(ye)是(shi)一(yi)(yi)種(zhong)應(ying)力(li)(li)(li)(li)(li)釋放。目前市(shi)場上銷(xiao)售(shou)的(de)(de)(de)(de)(de)濕式噴(pen)砂(sha)機(ji)(ji)(ji)都采用(yong)(yong)這(zhe)種(zhong)原理。噴(pen)砂(sha)機(ji)(ji)(ji)的(de)(de)(de)(de)(de)砂(sha)粒通(tong)常是(shi)剛玉,介質是(shi)水。拋(pao)(pao)丸(wan)一(yi)(yi)般(ban)用(yong)(yong)鋼球(qiu),噴(pen)砂(sha)用(yong)(yong)細(xi)砂(sha)。根據科學(xue)研究,有(you)拉應(ying)力(li)(li)(li)(li)(li)時比有(you)壓(ya)(ya)應(ying)力(li)(li)(li)(li)(li)時更容(rong)易破壞金屬(shu)材(cai)料(liao)(liao)表(biao)面。當零(ling)(ling)件(jian)表(biao)面承受壓(ya)(ya)應(ying)力(li)(li)(li)(li)(li)時,材(cai)料(liao)(liao)的(de)(de)(de)(de)(de)疲(pi)(pi)勞壽(shou)(shou)命大大提高(gao)。因(yin)此,噴(pen)丸(wan)通(tong)常用(yong)(yong)于(yu)(yu)軸等(deng)容(rong)易疲(pi)(pi)勞斷裂(lie)的(de)(de)(de)(de)(de)零(ling)(ling)件(jian),使(shi)(shi)其表(biao)面形成壓(ya)(ya)應(ying)力(li)(li)(li)(li)(li),從而(er)延長產品的(de)(de)(de)(de)(de)使(shi)(shi)用(yong)(yong)壽(shou)(shou)命。另外,由于(yu)(yu)金屬(shu)材(cai)料(liao)(liao)對張力(li)(li)(li)(li)(li)敏感,金屬(shu)的(de)(de)(de)(de)(de)抗拉強(qiang)(qiang)度遠低于(yu)(yu)抗壓(ya)(ya)強(qiang)(qiang)度,所以機(ji)(ji)(ji)械中(zhong)一(yi)(yi)般(ban)用(yong)(yong)抗拉強(qiang)(qiang)度(屈服、拉伸)來表(biao)示金屬(shu)材(cai)料(liao)(liao)的(de)(de)(de)(de)(de)材(cai)料(liao)(liao)性(xing)能(neng)。

而噴(pen)(pen)(pen)砂和(he)(he)(he)(he)拋丸(wan)(wan)(wan)(wan)可(ke)以用(yong)來對工(gong)(gong)件(jian)(jian)(jian)進行(xing)去(qu)(qu)污,主(zhu)要(yao)(yao)是(shi)(shi)為(wei)(wei)下(xia)(xia)一(yi)道工(gong)(gong)序(xu)做準備,比(bi)如噴(pen)(pen)(pen)漆和(he)(he)(he)(he)烤(kao)漆,也是(shi)(shi)為(wei)(wei)了保持(chi)零件(jian)(jian)(jian)的(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)一(yi)致性。需(xu)(xu)要(yao)(yao)理(li)(li)解(jie)的(de)(de)(de)(de)是(shi)(shi),拋丸(wan)(wan)(wan)(wan)可(ke)以強(qiang)化(hua)工(gong)(gong)件(jian)(jian)(jian),但噴(pen)(pen)(pen)砂就沒(mei)那么明(ming)顯了。通常(chang)拋丸(wan)(wan)(wan)(wan)材(cai)料是(shi)(shi)小(xiao)鋼球,噴(pen)(pen)(pen)砂材(cai)料是(shi)(shi)石英砂。根據號碼。噴(pen)(pen)(pen)砂和(he)(he)(he)(he)噴(pen)(pen)(pen)丸(wan)(wan)(wan)(wan)應保證下(xia)(xia)一(yi)道工(gong)(gong)序(xu)的(de)(de)(de)(de)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)粗(cu)(cu)糙(cao)度要(yao)(yao)求。復(fu)雜(za)形狀一(yi)般采用(yong)噴(pen)(pen)(pen)砂,不(bu)(bu)易手工(gong)(gong)除(chu)銹,效率低,現(xian)場環境差,規則形狀采用(yong)拋丸(wan)(wan)(wan)(wan),污染小(xiao)。有幾點需(xu)(xu)要(yao)(yao)了解(jie):1.噴(pen)(pen)(pen)砂和(he)(he)(he)(he)噴(pen)(pen)(pen)丸(wan)(wan)(wan)(wan)都是(shi)(shi)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)處(chu)理(li)(li),但并不(bu)(bu)意味(wei)著只(zhi)噴(pen)(pen)(pen)鑄(zhu)件(jian)(jian)(jian),其他部位也可(ke)以噴(pen)(pen)(pen)丸(wan)(wan)(wan)(wan)。2.噴(pen)(pen)(pen)砂的(de)(de)(de)(de)主(zhu)要(yao)(yao)目(mu)的(de)(de)(de)(de)是(shi)(shi)去(qu)(qu)除(chu)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)的(de)(de)(de)(de)鐵銹和(he)(he)(he)(he)氧化(hua)皮等。拋丸(wan)(wan)(wan)(wan)的(de)(de)(de)(de)作(zuo)用(yong)相(xiang)對更多。噴(pen)(pen)(pen)丸(wan)(wan)(wan)(wan)不(bu)(bu)僅可(ke)以去(qu)(qu)除(chu)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)的(de)(de)(de)(de)鐵銹和(he)(he)(he)(he)氧化(hua)皮,還可(ke)以提(ti)(ti)高表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)粗(cu)(cu)糙(cao)度,去(qu)(qu)除(chu)毛刺和(he)(he)(he)(he)消除(chu)內應力,減少零件(jian)(jian)(jian)熱處(chu)理(li)(li)后的(de)(de)(de)(de)變形,提(ti)(ti)高零件(jian)(jian)(jian)的(de)(de)(de)(de)耐(nai)磨(mo)性和(he)(he)(he)(he)抗壓能力。4.目(mu)前(qian)噴(pen)(pen)(pen)砂主(zhu)要(yao)(yao)是(shi)(shi)手工(gong)(gong)操作(zuo),而拋丸(wan)(wan)(wan)(wan)更多的(de)(de)(de)(de)是(shi)(shi)自動(dong)(dong)和(he)(he)(he)(he)半自動(dong)(dong)。拋丸(wan)(wan)(wan)(wan)的(de)(de)(de)(de)現(xian)代定(ding)義:拋丸(wan)(wan)(wan)(wan)是(shi)(shi)一(yi)種機械表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)處(chu)理(li)(li)工(gong)(gong)藝(yi)的(de)(de)(de)(de)名稱,類似的(de)(de)(de)(de)工(gong)(gong)藝(yi)有噴(pen)(pen)(pen)砂和(he)(he)(he)(he)拋丸(wan)(wan)(wan)(wan)。噴(pen)(pen)(pen)丸(wan)(wan)(wan)(wan)是(shi)(shi)一(yi)種冷(leng)處(chu)理(li)(li)工(gong)(gong)藝(yi),分為(wei)(wei)噴(pen)(pen)(pen)丸(wan)(wan)(wan)(wan)清(qing)理(li)(li)和(he)(he)(he)(he)噴(pen)(pen)(pen)丸(wan)(wan)(wan)(wan)強(qiang)化(hua)。拋丸(wan)(wan)(wan)(wan)清(qing)理(li)(li)顧名思義就是(shi)(shi)清(qing)除(chu)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)的(de)(de)(de)(de)氧化(hua)皮等雜(za)質(zhi),提(ti)(ti)高外(wai)觀質(zhi)量(liang)。拋丸(wan)(wan)(wan)(wan)強(qiang)化(hua)是(shi)(shi)用(yong)高速運動(dong)(dong)的(de)(de)(de)(de)彈丸(wan)(wan)(wan)(wan)(60-110米/秒)持(chi)續沖擊強(qiang)化(hua)工(gong)(gong)件(jian)(jian)(jian)表(biao)(biao)(biao)面(mian)(mian)(mian)(mian),在循環變形過程中迫使目(mu)標表(biao)(biao)(biao)面(mian)(mian)(mian)(mian)和(he)(he)(he)(he)表(biao)(biao)(biao)層(0.10-0.85毫米)發生以下(xia)(xia)變化(hua):



1.微結構被修改;



2.非均(jun)勻塑性變形的外(wai)表層引入殘余(yu)壓應力,內表層產生(sheng)殘余(yu)拉應力;



3.外表面粗(cu)糙度發生變化(Ra Rz)。影響(xiang):可提高材料/零件的(de)(de)抗疲勞斷裂(lie)能力,防止疲勞失效、塑性變形和脆性斷裂(lie),提高疲勞壽命(ming)。噴砂的(de)(de)定(ding)義:噴丸是一種廣泛應(ying)用于工廠的(de)(de)表面強化技術。它的(de)(de)設備簡(jian)單,成本低(di),不(bu)受(shou)工件形狀和位置的(de)(de)限制




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