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噴涂流水線前處理拋丸

時間:2022-06-20點擊(ji)次數(shu):919

噴砂(sha)是(shi)(shi)(shi)一(yi)(yi)種(zhong)表(biao)(biao)面(mian)(mian)(mian)強(qiang)化工(gong)(gong)藝(yi),用(yong)(yong)噴丸(wan)(wan)(wan)(wan)來提(ti)高(gao)(gao)零件(jian)(jian)的(de)(de)(de)機(ji)(ji)械(xie)(xie)強(qiang)度(du)、耐(nai)磨性(xing)、抗疲(pi)勞(lao)性(xing)和(he)耐(nai)腐蝕性(xing)。也(ye)可用(yong)(yong)于(yu)(yu)鑄造、鍛(duan)造和(he)焊接零件(jian)(jian)的(de)(de)(de)表(biao)(biao)面(mian)(mian)(mian)消光、除(chu)垢和(he)消除(chu)殘余應(ying)力(li)。拋丸(wan)(wan)(wan)(wan)是(shi)(shi)(shi)一(yi)(yi)種(zhong)機(ji)(ji)械(xie)(xie)表(biao)(biao)面(mian)(mian)(mian)處理工(gong)(gong)藝(yi)。其原(yuan)理是(shi)(shi)(shi)利用(yong)(yong)高(gao)(gao)速(su)旋轉的(de)(de)(de)葉輪(lun)甩出(chu)(chu)小(xiao)鋼(gang)球(qiu)(qiu)(qiu)(qiu)或小(xiao)鐵球(qiu)(qiu)(qiu)(qiu)來清潔零件(jian)(jian)表(biao)(biao)面(mian)(mian)(mian),從(cong)而提(ti)高(gao)(gao)外(wai)觀質(zhi)量,使(shi)工(gong)(gong)件(jian)(jian)美(mei)觀。同時工(gong)(gong)件(jian)(jian)的(de)(de)(de)焊接拉應(ying)力(li)變為(wei)壓(ya)應(ying)力(li),延(yan)長了工(gong)(gong)件(jian)(jian)的(de)(de)(de)使(shi)用(yong)(yong)壽命。常(chang)用(yong)(yong)的(de)(de)(de)球(qiu)(qiu)(qiu)(qiu)(包括鑄球(qiu)(qiu)(qiu)(qiu)、切球(qiu)(qiu)(qiu)(qiu)和(he)不(bu)銹鋼(gang)球(qiu)(qiu)(qiu)(qiu)等。直徑在0.23.0之間。拋丸(wan)(wan)(wan)(wan)是(shi)(shi)(shi)將高(gao)(gao)速(su)旋轉的(de)(de)(de)葉輪(lun)噴出(chu)(chu)的(de)(de)(de)小(xiao)鋼(gang)丸(wan)(wan)(wan)(wan)或鐵丸(wan)(wan)(wan)(wan),以高(gao)(gao)速(su)撞擊零件(jian)(jian)表(biao)(biao)面(mian)(mian)(mian),從(cong)而強(qiang)化零件(jian)(jian)的(de)(de)(de)機(ji)(ji)械(xie)(xie)性(xing)能。噴砂(sha)也(ye)可用(yong)(yong)于(yu)(yu)修改零件(jian)(jian)表(biao)(biao)面(mian)(mian)(mian)。拋丸(wan)(wan)(wan)(wan)不(bu)僅是(shi)(shi)(shi)一(yi)(yi)種(zhong)表(biao)(biao)面(mian)(mian)(mian)處理,也(ye)是(shi)(shi)(shi)一(yi)(yi)種(zhong)應(ying)力(li)釋放。目前(qian)市場上銷售的(de)(de)(de)濕式噴砂(sha)機(ji)(ji)都采用(yong)(yong)這種(zhong)原(yuan)理。噴砂(sha)機(ji)(ji)的(de)(de)(de)砂(sha)粒通常(chang)是(shi)(shi)(shi)剛(gang)玉,介質(zhi)是(shi)(shi)(shi)水。拋丸(wan)(wan)(wan)(wan)一(yi)(yi)般(ban)用(yong)(yong)鋼(gang)球(qiu)(qiu)(qiu)(qiu),噴砂(sha)用(yong)(yong)細砂(sha)。根據(ju)科學研究,有拉應(ying)力(li)時比有壓(ya)應(ying)力(li)時更容(rong)(rong)易(yi)破壞金屬(shu)(shu)材(cai)(cai)料(liao)表(biao)(biao)面(mian)(mian)(mian)。當零件(jian)(jian)表(biao)(biao)面(mian)(mian)(mian)承受(shou)壓(ya)應(ying)力(li)時,材(cai)(cai)料(liao)的(de)(de)(de)疲(pi)勞(lao)壽命大大提(ti)高(gao)(gao)。因此,噴丸(wan)(wan)(wan)(wan)通常(chang)用(yong)(yong)于(yu)(yu)軸等容(rong)(rong)易(yi)疲(pi)勞(lao)斷(duan)裂的(de)(de)(de)零件(jian)(jian),使(shi)其表(biao)(biao)面(mian)(mian)(mian)形成壓(ya)應(ying)力(li),從(cong)而延(yan)長產品(pin)的(de)(de)(de)使(shi)用(yong)(yong)壽命。另(ling)外(wai),由于(yu)(yu)金屬(shu)(shu)材(cai)(cai)料(liao)對張力(li)敏感,金屬(shu)(shu)的(de)(de)(de)抗拉強(qiang)度(du)遠低于(yu)(yu)抗壓(ya)強(qiang)度(du),所以機(ji)(ji)械(xie)(xie)中(zhong)一(yi)(yi)般(ban)用(yong)(yong)抗拉強(qiang)度(du)(屈服、拉伸)來表(biao)(biao)示(shi)金屬(shu)(shu)材(cai)(cai)料(liao)的(de)(de)(de)材(cai)(cai)料(liao)性(xing)能。

而噴(pen)(pen)(pen)砂(sha)(sha)和(he)(he)拋(pao)丸(wan)(wan)(wan)可以(yi)用(yong)(yong)來對工(gong)(gong)件(jian)進(jin)行去污(wu),主要是(shi)為(wei)下(xia)一(yi)道工(gong)(gong)序(xu)做準備,比如(ru)噴(pen)(pen)(pen)漆和(he)(he)烤漆,也是(shi)為(wei)了保持(chi)零(ling)件(jian)的(de)(de)表(biao)(biao)(biao)面(mian)(mian)一(yi)致性。需(xu)要理解(jie)的(de)(de)是(shi),拋(pao)丸(wan)(wan)(wan)可以(yi)強(qiang)(qiang)化(hua)(hua)(hua)工(gong)(gong)件(jian),但噴(pen)(pen)(pen)砂(sha)(sha)就沒那么明顯了。通常拋(pao)丸(wan)(wan)(wan)材料是(shi)小鋼球,噴(pen)(pen)(pen)砂(sha)(sha)材料是(shi)石英砂(sha)(sha)。根據號碼。噴(pen)(pen)(pen)砂(sha)(sha)和(he)(he)噴(pen)(pen)(pen)丸(wan)(wan)(wan)應(ying)保證下(xia)一(yi)道工(gong)(gong)序(xu)的(de)(de)表(biao)(biao)(biao)面(mian)(mian)粗(cu)糙(cao)度要求。復雜(za)形(xing)狀一(yi)般(ban)采(cai)用(yong)(yong)噴(pen)(pen)(pen)砂(sha)(sha),不(bu)易手(shou)工(gong)(gong)除銹(xiu),效(xiao)率低,現場環境(jing)差,規則形(xing)狀采(cai)用(yong)(yong)拋(pao)丸(wan)(wan)(wan),污(wu)染(ran)小。有幾點需(xu)要了解(jie):1.噴(pen)(pen)(pen)砂(sha)(sha)和(he)(he)噴(pen)(pen)(pen)丸(wan)(wan)(wan)都(dou)是(shi)表(biao)(biao)(biao)面(mian)(mian)處(chu)理,但并(bing)不(bu)意(yi)味(wei)著只噴(pen)(pen)(pen)鑄(zhu)件(jian),其他部(bu)位也可以(yi)噴(pen)(pen)(pen)丸(wan)(wan)(wan)。2.噴(pen)(pen)(pen)砂(sha)(sha)的(de)(de)主要目的(de)(de)是(shi)去除表(biao)(biao)(biao)面(mian)(mian)的(de)(de)鐵銹(xiu)和(he)(he)氧(yang)化(hua)(hua)(hua)皮等。拋(pao)丸(wan)(wan)(wan)的(de)(de)作用(yong)(yong)相對更多(duo)(duo)。噴(pen)(pen)(pen)丸(wan)(wan)(wan)不(bu)僅(jin)可以(yi)去除表(biao)(biao)(biao)面(mian)(mian)的(de)(de)鐵銹(xiu)和(he)(he)氧(yang)化(hua)(hua)(hua)皮,還可以(yi)提高(gao)表(biao)(biao)(biao)面(mian)(mian)粗(cu)糙(cao)度,去除毛(mao)刺和(he)(he)消除內應(ying)力(li),減(jian)少零(ling)件(jian)熱處(chu)理后的(de)(de)變(bian)形(xing),提高(gao)零(ling)件(jian)的(de)(de)耐磨性和(he)(he)抗壓能力(li)。4.目前噴(pen)(pen)(pen)砂(sha)(sha)主要是(shi)手(shou)工(gong)(gong)操作,而拋(pao)丸(wan)(wan)(wan)更多(duo)(duo)的(de)(de)是(shi)自動(dong)和(he)(he)半自動(dong)。拋(pao)丸(wan)(wan)(wan)的(de)(de)現代定義:拋(pao)丸(wan)(wan)(wan)是(shi)一(yi)種機械表(biao)(biao)(biao)面(mian)(mian)處(chu)理工(gong)(gong)藝的(de)(de)名(ming)稱,類似的(de)(de)工(gong)(gong)藝有噴(pen)(pen)(pen)砂(sha)(sha)和(he)(he)拋(pao)丸(wan)(wan)(wan)。噴(pen)(pen)(pen)丸(wan)(wan)(wan)是(shi)一(yi)種冷處(chu)理工(gong)(gong)藝,分為(wei)噴(pen)(pen)(pen)丸(wan)(wan)(wan)清理和(he)(he)噴(pen)(pen)(pen)丸(wan)(wan)(wan)強(qiang)(qiang)化(hua)(hua)(hua)。拋(pao)丸(wan)(wan)(wan)清理顧名(ming)思義就是(shi)清除表(biao)(biao)(biao)面(mian)(mian)的(de)(de)氧(yang)化(hua)(hua)(hua)皮等雜(za)質,提高(gao)外(wai)觀質量。拋(pao)丸(wan)(wan)(wan)強(qiang)(qiang)化(hua)(hua)(hua)是(shi)用(yong)(yong)高(gao)速運動(dong)的(de)(de)彈丸(wan)(wan)(wan)(60-110米(mi)/秒)持(chi)續沖(chong)擊強(qiang)(qiang)化(hua)(hua)(hua)工(gong)(gong)件(jian)表(biao)(biao)(biao)面(mian)(mian),在循環變(bian)形(xing)過程中迫使目標表(biao)(biao)(biao)面(mian)(mian)和(he)(he)表(biao)(biao)(biao)層(0.10-0.85毫米(mi))發生以(yi)下(xia)變(bian)化(hua)(hua)(hua):



1.微結構被修改;



2.非均勻(yun)塑(su)性變形的(de)外表(biao)層引入殘余壓應(ying)力,內表(biao)層產生殘余拉應(ying)力;



3.外表(biao)面粗糙度(du)發(fa)生變化(hua)(Ra Rz)。影響(xiang):可提(ti)高材(cai)料(liao)/零(ling)件(jian)的(de)(de)抗(kang)疲(pi)(pi)勞(lao)(lao)斷裂(lie)能力,防止疲(pi)(pi)勞(lao)(lao)失(shi)效、塑性變形(xing)和脆性斷裂(lie),提(ti)高疲(pi)(pi)勞(lao)(lao)壽(shou)命。噴(pen)砂(sha)的(de)(de)定義(yi):噴(pen)丸是一種廣泛(fan)應用于(yu)工(gong)廠的(de)(de)表(biao)面強(qiang)化(hua)技術。它的(de)(de)設備簡單,成本低,不受工(gong)件(jian)形(xing)狀(zhuang)和位置的(de)(de)限制




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