18611727265
18611776020
北京机械加工的处理原理
1、在机械加(jia)工工艺(yi)路线中，常安(an)排(pai)有热处理工序。
2、北京机(ji)械(xie)加(jia)(jia)(jia)工(gong)(gong)为了保(bao)证加(jia)(jia)(jia)工(gong)(gong)精(jing)(jing)(jing)度，粗(cu)、精(jing)(jing)(jing)加(jia)(jia)(jia)工(gong)(gong)最好(hao)分开进(jin)(jin)行(xing)。因为粗(cu)加(jia)(jia)(jia)工(gong)(gong)时(shi)，切削量大(da)，工(gong)(gong)件所受(shou)切削力、夹紧(jin)力大(da)，发热(re)量多，以及加(jia)(jia)(jia)工(gong)(gong)表面有较(jiao)显(xian)著(zhu)的加(jia)(jia)(jia)工(gong)(gong)硬化(hua)现象，工(gong)(gong)件内(nei)部存在(zai)着较(jiao)大(da)的内(nei)应(ying)力，如(ru)果粗(cu)、粗(cu)加(jia)(jia)(jia)工(gong)(gong)连(lian)续进(jin)(jin)行(xing)，则精(jing)(jing)(jing)加(jia)(jia)(jia)工(gong)(gong)后的零(ling)件精(jing)(jing)(jing)度会(hui)因为应(ying)力的重新分布(bu)而很快丧失(shi)。对于某些加(jia)(jia)(jia)工(gong)(gong)精(jing)(jing)(jing)度要求高的零(ling)件。机(ji)械(xie)加(jia)(jia)(jia)工(gong)(gong)在(zai)粗(cu)加(jia)(jia)(jia)工(gong)(gong)之(zhi)后和精(jing)(jing)(jing)加(jia)(jia)(jia)工(gong)(gong)之(zhi)前(qian)，还应(ying)安排低(di)温退火或时(shi)效处理工(gong)(gong)序来消除内(nei)应(ying)力。
3、合(he)理(li)地选用设备(bei)。机械(xie)加(jia)(jia)(jia)工(gong)(gong)粗加(jia)(jia)(jia)工(gong)(gong)主要(yao)(yao)是(shi)切掉大部分加(jia)(jia)(jia)工(gong)(gong)余量，并(bing)不要(yao)(yao)求(qiu)有较高(gao)的加(jia)(jia)(jia)工(gong)(gong)精度(du)(du)，所(suo)以粗加(jia)(jia)(jia)工(gong)(gong)应在功率较大、精度(du)(du)不太高(gao)的机床上(shang)进(jin)行，精加(jia)(jia)(jia)工(gong)(gong)工(gong)(gong)序则要(yao)(yao)求(qiu)用较高(gao)精度(du)(du)的机床加(jia)(jia)(jia)工(gong)(gong)。粗、精加(jia)(jia)(jia)工(gong)(gong)分别在不同的机床上(shang)加(jia)(jia)(jia)工(gong)(gong)，既能(neng)充分发挥设备(bei)能(neng)力，又(you)能(neng)延(yan)长精密机床的使用寿命。