99热99,www.sese,色情一区二区三区免费看,人妻换人妻仑乱,天堂在/线资源中文在线

 如(ru)何進行機(ji)械(xie)(xie)加工(gong)(gong)(gong)工(gong)(gong)(gong)序(xu)的設(she)計？東莞(guan)機(ji)械(xie)(xie)加工(gong)(gong)(gong)工(gong)(gong)(gong)序(xu)的定(ding)義是(shi)什么？很多機(ji)械(xie)(xie)加工(gong)(gong)(gong)廠(chang)廠(chang)家都會有這樣一個(ge)問題，對機(ji)械(xie)(xie)加工(gong)(gong)(gong)工(gong)(gong)(gong)序(xu)有自己的理解。所(suo)謂機(ji)械(xie)(xie)加工(gong)(gong)(gong)工(gong)(gong)(gong)序(xu)是(shi)指(zhi)完成一個(ge)工(gong)(gong)(gong)件，所(suo)需(xu)要(yao)的步(bu)驟(zou)(zou)。這個(ge)步(bu)驟(zou)(zou)可(ke)以(yi)(yi)是(shi)由單獨一個(ge)人(ren)(ren)完成的，也可(ke)以(yi)(yi)是(shi)有很多人(ren)(ren)共(gong)同完成的；工(gong)(gong)(gong)件可(ke)以(yi)(yi)是(shi)一個(ge)，也可(ke)以(yi)(yi)的多個(ge)。
如何設計(ji)機械加工(gong)工(gong)序，這是每個廠家必須面(mian)臨的(de)問題(ti)。不同(tong)的(de)生產(chan)設備，不同(tong)的(de)生產(chan)規模，不同(tong)的(de)生產(chan)條件，不同(tong)的(de)人員(yuan)配備，所設計(ji)的(de)工(gong)藝也不盡相同(tong)。但是原理(li)是相通的(de)，
    一般，單件產(chan)品，可(ke)交由(you)師傅(fu)，自(zi)己(ji)全權處理(li)；大(da)(da)批量(liang)零(ling)(ling)件，必須由(you)專人(ren)下料，開粗(cu)(cu)，粗(cu)(cu)加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)和精(jing)加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)才可(ke)以(yi)快(kuai)速有效(xiao)的(de)生產(chan)。為了保證(zheng)加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)精(jing)度，粗(cu)(cu)、精(jing)加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)最好(hao)分(fen)開進行。因(yin)為粗(cu)(cu)加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)時，切(qie)削量(liang)大(da)(da)，工(gong)(gong)(gong)件所受切(qie)削力(li)、夾(jia)緊力(li)大(da)(da)，發熱量(liang)多，以(yi)及(ji)加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)表面有較顯著的(de)加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)硬化現象，工(gong)(gong)(gong)件內(nei)(nei)部存在(zai)著較大(da)(da)的(de)內(nei)(nei)應(ying)力(li)，如果粗(cu)(cu)、粗(cu)(cu)加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)連續進行，則精(jing)加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)后的(de)零(ling)(ling)件精(jing)度會因(yin)為應(ying)力(li)的(de)重(zhong)新分(fen)布(bu)而很快(kuai)喪失(shi)。對于某些加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)精(jing)度要求高(gao)的(de)零(ling)(ling)件。在(zai)粗(cu)(cu)加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)之后和精(jing)加(jia)(jia)(jia)(jia)(jia)工(gong)(gong)(gong)之前，還應(ying)安排低溫退火(huo)或時效(xiao)處理(li)工(gong)(gong)(gong)序來消(xiao)除(chu)內(nei)(nei)應(ying)力(li)。