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功(gong)(gong)率(lv)密度(du)(du)(du)是(shi)CNC火(huo)花(hua)緊固(gu)(gu)件(jian)(jian)功(gong)(gong)率(lv)密度(du)(du)(du)是(shi)CNC火(huo)花(hua)緊固(gu)(gu)件(jian)(jian)的(de)(de)(de)(de)一(yi)個(ge)重要(yao)分(fen)項(xiang)，雖(sui)然在(zai)使用(yong)者購買(mai)時能盡(jin)可能挑選出精(jing)(jing)確(que)度(du)(du)(du)高(gao)數(shu)值(zhi)小的(de)(de)(de)(de)緊固(gu)(gu)件(jian)(jian)，但是(shi)隨著電子(zi)(zi)設備(bei)啟用(yong)天數(shu)越長，電子(zi)(zi)設備(bei)破損(sun)越嚇人，導致(zhi)緊固(gu)(gu)件(jian)(jian)的(de)(de)(de)(de)功(gong)(gong)能定(ding)位(wei)數(shu)值(zhi)愈來(lai)愈大(da)，這對(dui)研磨(mo)和生產的(de)(de)(de)(de)配件(jian)(jian)有著毀滅(mie)性的(de)(de)(de)(de)負(fu)面影(ying)響，選用(yong)以上方(fang)式對(dui)緊固(gu)(gu)件(jian)(jian)各單位(wei)向量的(de)(de)(de)(de)逆向局限(xian)性、功(gong)(gong)率(lv)密度(du)(du)(du)展開精(jing)(jing)確(que)量測和補償(chang)金(jin)，能較好地增大(da)或(huo)消解(jie)逆向局限(xian)性對(dui)緊固(gu)(gu)件(jian)(jian)精(jing)(jing)確(que)度(du)(du)(du)的(de)(de)(de)(de)有利負(fu)面影(ying)響，提高(gao)緊固(gu)(gu)件(jian)(jian)的(de)(de)(de)(de)功(gong)(gong)率(lv)密度(du)(du)(du)，使緊固(gu)(gu)件(jian)(jian)處在(zai)最差精(jing)(jing)確(que)度(du)(du)(du)狀況，進而確(que)保(bao)配件(jian)(jian)的(de)(de)(de)(de)研磨(mo)產品質量。如(ru)果測到CNC火(huo)花(hua)緊固(gu)(gu)件(jian)(jian)的(de)(de)(de)(de)功(gong)(gong)能定(ding)位(wei)數(shu)值(zhi)遠(yuan)(yuan)遠(yuan)(yuan)超過數(shu)值(zhi)

電火花(hua)加工(gong)(gong)方法由(you)前蘇聯的(de)(de)(de)(de)(de)學(xue)者拉扎(zha)連柯(ke)夫(fu)婦于1943年(nian)發明的(de)(de)(de)(de)(de)。拉扎(zha)連柯(ke)生于1910年(nian)。1929年(nian)起(qi)他在頓巴斯冶金工(gong)(gong)廠當鍛(duan)工(gong)(gong)，1931年(nian)至1936年(nian)是(shi)(shi)莫斯科國(guo)立(li)羅蒙(meng)諾索夫(fu)大學(xue)的(de)(de)(de)(de)(de)學(xue)生 。1935年(nian)起(qi)就(jiu)在全(quan)蘇列寧(ning)電工(gong)(gong)技術研究(jiu)所開始了研究(jiu)工(gong)(gong)作(zuo)，畢業(ye)論文(wen)的(de)(de)(de)(de)(de)題(ti)目是(shi)(shi)研究(jiu)引起(qi)觸(chu)點(dian)材(cai)料(liao)破(po)壞的(de)(de)(de)(de)(de)原因及尋(xun)找消除方法。這是(shi)(shi)他人生道(dao)路的(de)(de)(de)(de)(de)轉折點(dian) 。當時，隨著電氣化(hua)和自動化(hua)的(de)(de)(de)(de)(de)發 展，觸(chu)點(dian)材(cai)料(liao)被電腐蝕(shi)而破(po)壞的(de)(de)(de)(de)(de)現(xian)象(xiang)日趨嚴重，為此，人們千方百計(ji)地與這種有害現(xian)象(xiang)作(zuo)斗爭。年(nian)輕的(de)(de)(de)(de)(de)拉扎(zha)連柯(ke)以極大的(de)(de)(de)(de)(de)勇氣和銳敏的(de)(de)(de)(de)(de)洞察力，打破(po)常規，克服了學(xue)者們認(ren)為電腐蝕(shi)是(shi)(shi)有害現(xian)象(xiang)的(de)(de)(de)(de)(de)傳統(tong)習慣思

一、判斷(duan)題：（共(gong)10題，每題2分(fen)，共(gong)計20分(fen)）1. 火(huo)花機(ji)設(she)備操作人員(yuan)安全(quan)保護(hu)用(yong)品未佩帶齊全(quan)，嚴(yan)禁操作設(she)備。 ( √ )2. 火(huo)花機(ji)設(she)備操作工(gong)開機(ji)前應(ying)進(jin)行設(she)備狀(zhuang)態檢(jian)查，存在小故(gu)障不影響正常開機(ji)生產(chan)。 ( X )3. 火(huo)花機(ji)設(she)備出現緊急(ji)情況時應(ying)按下急(ji)停開關，立即通知設(she)備維修工(gong)進(jin)行處理(li)。 ( √ )4. 火(huo)花機(ji)設(she)備的安全(quan)防護(hu)裝置(zhi)在任(ren)何(he)情況下嚴(yan)禁拆卸(xie)、毀(hui)損、短接或挪(nuo)作它 ( √ )5. 火(huo)花機(ji)設(she)備外觀要保持清潔，漆見(jian)本(ben)色鐵(tie)見(jian)光。 ( √ )6. 火(huo)花機(ji)設(she)備潤滑、油(you)液加(jia)(jia)注口有相應(ying)標示，張貼油(you)液加(jia)(jia)注量和加(jia)(jia)注的品牌規格。 ( √ )7. 火(huo)花機(ji)設(she)備加(jia)(jia)工(gong)工(gong)件完(wan)成后鐵(tie)

火花機的工作原理(li)：電(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)提(ti)供電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)給各用(yong)(yong)電(dian)(dian)(dian)(dian)(dian)(dian)元(yuan)件。同時通過其電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)調整器（內含高(gao)(gao)頻振蕩(dang)電(dian)(dian)(dian)(dian)(dian)(dian)路，用(yong)(yong)來產生(sheng)(sheng)高(gao)(gao)頻電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)）調整其工作電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，并(bing)經高(gao)(gao)壓(ya)(ya)(ya)(ya)變壓(ya)(ya)(ya)(ya)器變壓(ya)(ya)(ya)(ya)后，提(ti)供給試驗電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)（鏈珠(zhu)）高(gao)(gao)頻高(gao)(gao)壓(ya)(ya)(ya)(ya)。需要(yao)指(zhi)出的是(shi)試驗電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)處的電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)雖然很高(gao)(gao)，但(dan)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)卻(que)很小（一(yi)般(ban)在50mA以下）。當(dang)被測(ce)電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)經過試驗電(dian)(dian)(dian)(dian)(dian)(dian)極(ji)時：如果電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)絕緣性(xing)良(liang)好(hao)，電(dian)(dian)(dian)(dian)(dian)(dian)線(xian)中會(hui)產生(sheng)(sheng)穩(wen)定的感應(ying)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)，不存(cun)在電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)差；但(dan)當(dang)絕緣層出現(xian)缺(que)陷時（如：漏銅、有氣孔、嚴重偏心等(deng)），高(gao)(gao)頻高(gao)(gao)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)就會(hui)對金屬導體放電(dian)(dian)(dian)(dian)(dian)(dian)（這(zhe)是(shi)高(gao)(gao)頻高(gao)(gao)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)的特性(xing)）。因(yin)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)很小，電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)將會(hui)極(ji)劇減(jian)小。產生(sheng)(sheng)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)(ya)差。這(zhe)時擊穿檢測(ce)就會(hui)將其

電(dian)火(huo)花(hua)的(de)(de)(de)(de)(de)加(jia)工(gong)(gong)(gong)方式(shi)已經(jing)有一(yi)定的(de)(de)(de)(de)(de)歷史了，并(bing)不是(shi)最新的(de)(de)(de)(de)(de)工(gong)(gong)(gong)藝(yi)，但和鍛打，冶金相(xiang)比(bi)電(dian)火(huo)花(hua)并(bing)不算古老，電(dian)火(huo)花(hua)加(jia)工(gong)(gong)(gong)就(jiu)是(shi)利用(yong)電(dian)極(ji)(ji)與(yu)工(gong)(gong)(gong)件之間在(zai)通(tong)(tong)電(dian)的(de)(de)(de)(de)(de)時候(hou)產生(sheng)火(huo)花(hua)（因為(wei)是(shi)正負極(ji)(ji)直接接觸(chu)，產生(sheng)短(duan)路），所產生(sheng)的(de)(de)(de)(de)(de)瞬時間的(de)(de)(de)(de)(de)高溫，去一(yi)層(ceng)一(yi)層(ceng)蝕除掉工(gong)(gong)(gong)件與(yu)電(dian)極(ji)(ji)接觸(chu)的(de)(de)(de)(de)(de)表面，使電(dian)極(ji)(ji)周圍的(de)(de)(de)(de)(de)材料不斷減少的(de)(de)(de)(de)(de)原理(li)。電(dian)火(huo)花(hua)這種加(jia)工(gong)(gong)(gong)工(gong)(gong)(gong)藝(yi)，通(tong)(tong)常(chang)適用(yong)于相(xiang)對硬度比(bi)較高的(de)(de)(de)(de)(de)，并(bing)且材料必須具備導電(dian)性(xing)的(de)(de)(de)(de)(de)零件加(jia)工(gong)(gong)(gong)，一(yi)般的(de)(de)(de)(de)(de)電(dian)火(huo)花(hua)機因為(wei)電(dian)極(ji)(ji)要蝕掉一(yi)層(ceng)再下(xia)降一(yi)層(ceng)，方可(ke)與(yu)工(gong)(gong)(gong)件再次接近，也(ye)才(cai)可(ke)產生(sheng)電(dian)火(huo)花(hua)，所以通(tong)(tong)常(chang)因為(wei)下(xia)降精度要求(qiu)有些高，使用(yong)的(de)(de)(de)(de)(de)電(dian)火(huo)花(hua)機，基本上(shang)都是(shi)數(shu)控(kong)電(dian)火(huo)

目(mu)前，應(ying)(ying)用在機械制造行(xing)業的(de)(de)(de)數(shu)控(kong)(kong)(kong)機床(chuang)(chuang)(chuang)大致可分(fen)為數(shu)控(kong)(kong)(kong)銑(xian)(xian)(xian)(xian)床(chuang)(chuang)(chuang)、數(shu)控(kong)(kong)(kong)加工(gong)(gong)中(zhong)心(xin)、數(shu)控(kong)(kong)(kong)車床(chuang)(chuang)(chuang)、數(shu)控(kong)(kong)(kong)磨床(chuang)(chuang)(chuang)、數(shu)控(kong)(kong)(kong)線切割機床(chuang)(chuang)(chuang)等(deng)，下面(mian)簡要介紹數(shu)控(kong)(kong)(kong)銑(xian)(xian)(xian)(xian)床(chuang)(chuang)(chuang)和(he)(he)(he)加工(gong)(gong)中(zhong)心(xin)的(de)(de)(de)分(fen)類(lei)。一、數(shu)控(kong)(kong)(kong)銑(xian)(xian)(xian)(xian)床(chuang)(chuang)(chuang)的(de)(de)(de)類(lei)型數(shu)控(kong)(kong)(kong)銑(xian)(xian)(xian)(xian)床(chuang)(chuang)(chuang)可加工(gong)(gong)各種(zhong)具有(you)平面(mian)輪(lun)廓和(he)(he)(he)立體曲面(mian)的(de)(de)(de)零件。數(shu)控(kong)(kong)(kong)銑(xian)(xian)(xian)(xian)床(chuang)(chuang)(chuang)還可以進行(xing)鉆、擴(kuo)、鉸(jiao)、鏜孔和(he)(he)(he)攻螺紋等(deng)加工(gong)(gong)。數(shu)控(kong)(kong)(kong)銑(xian)(xian)(xian)(xian)床(chuang)(chuang)(chuang)分(fen)為立式數(shu)控(kong)(kong)(kong)銑(xian)(xian)(xian)(xian)床(chuang)(chuang)(chuang)（圖(tu)(tu) 3-1）和(he)(he)(he)臥式數(shu)控(kong)(kong)(kong)銑(xian)(xian)(xian)(xian)床(chuang)(chuang)(chuang)（圖(tu)(tu) 3-2）兩種(zhong)。數(shu)控(kong)(kong)(kong)銑(xian)(xian)(xian)(xian)床(chuang)(chuang)(chuang)有(you) 2 軸(zhou)(zhou)(zhou)(zhou)聯(lian)動(dong)、3 軸(zhou)(zhou)(zhou)(zhou)聯(lian)動(dong)、4 軸(zhou)(zhou)(zhou)(zhou)聯(lian)動(dong)和(he)(he)(he)5 軸(zhou)(zhou)(zhou)(zhou)聯(lian)動(dong)等(deng)不同檔(dang)次(ci)，現在應(ying)(ying)用最廣泛的(de)(de)(de)是 3 軸(zhou)(zhou)(zhou)(zhou)聯(lian)動(dong)的(de)(de)(de)數(shu)控(kong)(kong)(kong)銑(xian)(xian)(xian)(xian)床(chuang)(chuang)(chuang)，4 軸(zhou)(zhou)(zhou)(zhou)聯(lian)動(dong)和(he)(he)(he) 5 軸(zhou)(zhou)(zhou)(zhou)聯(lian)動(dong)的(de)(de)(de)數(shu)控(kong)(kong)(kong)銑(xian)(xian)(xian)(xian)床(chuang)(chuang)(chuang)一般都應(ying)(ying)用于(yu)軍工(gong)(gong)、汽車和(he)(he)(he)航天(tian)工(gong)(gong)業。二、加工(gong)(gong)中(zhong)心(xin)的(de)(de)(de)