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