精(jing)密(mi)機(ji)械加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)在進(jin)(jin)行操作的(de)(de)過程(cheng)中是一種用加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)機(ji)械對工(gong)(gong)(gong)(gong)(gong)(gong)(gong)件(jian)的(de)(de)外形尺寸或者是性能(neng)進(jin)(jin)行改變(bian)的(de)(de)過程(cheng)，精(jing)密(mi)機(ji)械加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)按被(bei)加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)的(de)(de)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)件(jian)處于(yu)的(de)(de)溫度(du)狀態，在一定程(cheng)度(du)上可以分為冷加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)和(he)熱加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)。一般(ban)在常(chang)溫下加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong),并且不引起(qi)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)件(jian)的(de)(de)化(hua)(hua)學(xue)或物相變(bian)化(hua)(hua)，稱(cheng)冷加(jia)(jia)工(gong)(gong)(gong)(gong)(gong)(gong)(gong)。

　　精(jing)密機械(xie)加(jia)(jia)工(gong)(gong)(gong)一般在高(gao)于或者是低于常(chang)溫狀(zhuang)態加(jia)(jia)工(gong)(gong)(gong)，這樣就會直接引起工(gong)(gong)(gong)件(jian)的化學或者是物的相(xiang)變化，有效的稱為熱加(jia)(jia)工(gong)(gong)(gong)，冷加(jia)(jia)工(gong)(gong)(gong)按(an)加(jia)(jia)工(gong)(gong)(gong)方式的差別可分為切削加(jia)(jia)工(gong)(gong)(gong)和(he)(he)壓(ya)力加(jia)(jia)工(gong)(gong)(gong)。熱加(jia)(jia)工(gong)(gong)(gong)常(chang)見(jian)有熱處理(li)、鍛(duan)造、鑄造和(he)(he)焊接。

　　精(jing)密(mi)機械加(jia)工主要是通過其各種機械對(dui)工件(jian)的外形(xing)尺(chi)寸或功用進行改動的進程。按被(bei)加(jia)工工件(jian)處于的溫度狀況,分為冷加(jia)工和熱(re)加(jia)工。

　　其中機(ji)械加(jia)工(gong)(gong)(gong)中的(de)工(gong)(gong)(gong)序(xu)是(shi)指在一個(ge)工(gong)(gong)(gong)作地址,對(dui)一個(ge)或(huo)一組工(gong)(gong)(gong)件所連(lian)(lian)續結束(shu)的(de)那有些技(ji)能(neng)(neng)進(jin)程。構成一個(ge)工(gong)(gong)(gong)序(xu)的(de)首要特點(dian)是(shi)不改(gai)動(dong)加(jia)工(gong)(gong)(gong)目標(biao)、設(she)備和操作者,并且工(gong)(gong)(gong)序(xu)的(de)內(nei)容(rong)是(shi)連(lian)(lian)續結束(shu)的(de)。其技(ji)能(neng)(neng)進(jin)程能(neng)(neng)夠分為以下(xia)兩個(ge)工(gong)(gong)(gong)序(xu)。

　　精密機械加工的(de)技術規(gui)程是規(gui)則(ze)零件機械加工技術進程和操(cao)作辦法(fa)等技術文件之一，它(ta)是在具體的(de)出產條件下，把較為合理的(de)技術進程和操(cao)作辦法(fa)。

　　機械加工技術規(gui)程通常包(bao)含以(yi)下(xia)內容：工件加工的技術道路(lu)、各工序的具體內容及所用(yong)的設備和(he)技術裝備、工件的查驗項目及查驗辦(ban)法、切削用(yong)量、時間定額等。

　　精(jing)細零(ling)件加(jia)工技術就是在流程(cheng)的基礎上(shang)，改變出產目標的形狀、尺度、相(xiang)對方位(wei)和(he)性質(zhi)等(deng)，使其變成(cheng)成(cheng)品(pin)或半成(cheng)品(pin)，是每個(ge)進程(cheng)，每個(ge)流程(cheng)的具體闡(chan)明，比方，上(shang)面說的，粗加(jia)工也許(xu)包含毛坯制作，打磨等(deng)等(deng)，精(jing)加(jia)工也許(xu)分為車，鉗工，銑床(chuang)，等(deng)等(deng)。

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