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激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)是20世紀(ji)人類最偉大(da)的發(fa)明(ming)之一(yi),現在(zai)已(yi)廣泛應用(yong)于(yu)工(gong)業、軍事、科學研究與日常生活中。激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)具有四大(da)特(te)性(xing)(xing)(xing):高(gao)(gao)的單(dan)色性(xing)(xing)(xing)、方向性(xing)(xing)(xing)、相干性(xing)(xing)(xing)和亮度(du)性(xing)(xing)(xing)。應用(yong)激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)固有的四大(da)特(te)性(xing)(xing)(xing),將具有高(gao)(gao)能(neng)(neng)量密度(du)的,能(neng)(neng)被聚焦到微小空間的激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)用(yong)于(yu)加工(gong)的方法叫(jiao)激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)加工(gong)。激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)加工(gong)技(ji)術是一(yi)項集(ji)光(guang)(guang)(guang)(guang)(guang)、機電、材料及檢測于(yu)一(yi)體的先進技(ji)術。激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)加工(gong)主要涉及:激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)焊接、激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)切割、激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)打(da)標(biao)、激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)雕刻等。現在(zai)一(yi)般的激(ji)(ji)(ji)光(guang)(guang)(guang)(guang)(guang)加工(gong)都采用(yong)了(le)多項先進技(ji)術, 多功能(neng)(neng)集(ji)成度(du)高(gao)(gao)、實(shi)用(yong)性(xing)(xing)(xing)強、自(zi)動化程度(du)高(gao)(gao)、操作(zuo)簡單(dan)、結果直(zhi)觀(guan),而且加工(gong)過(guo)程中可實(shi)現動態同(tong)步跟(gen)蹤(zong)顯示,具有程序錯誤自(zi)動診斷、限位(wei)保護等功能(neng)(neng)。

激光有很多特點,本文介紹以下幾種:
1.定向發光
普通光(guang)(guang)(guang)(guang)源(yuan)是(shi)向(xiang)(xiang)四面八方(fang)發光(guang)(guang)(guang)(guang)。要讓發射(she)的(de)(de)光(guang)(guang)(guang)(guang)朝(chao)一個方(fang)向(xiang)(xiang)傳播,需(xu)要給光(guang)(guang)(guang)(guang)源(yuan)裝上一定的(de)(de)聚光(guang)(guang)(guang)(guang)裝置(zhi),如汽(qi)車(che)的(de)(de)車(che)前燈(deng)和(he)探照燈(deng)都是(shi)安裝有(you)(you)聚光(guang)(guang)(guang)(guang)作用的(de)(de)反光(guang)(guang)(guang)(guang)鏡,使輻(fu)射(she)光(guang)(guang)(guang)(guang)匯(hui)集起來向(xiang)(xiang)一個方(fang)向(xiang)(xiang)射(she)出。激光(guang)(guang)(guang)(guang)器發射(she)的(de)(de)激光(guang)(guang)(guang)(guang),天生(sheng)就(jiu)是(shi)朝(chao)一個方(fang)向(xiang)(xiang)射(she)出,光(guang)(guang)(guang)(guang)束的(de)(de)發散度極小(xiao),大約只有(you)(you)0.001弧(hu)度,接近平行。
2.亮度極高
在(zai)激(ji)(ji)(ji)光(guang)(guang)發(fa)明前,人(ren)工光(guang)(guang)源中(zhong)(zhong)高(gao)(gao)壓脈沖氙燈(deng)的(de)亮度(du)(du)最(zui)高(gao)(gao),與(yu)太陽的(de)亮度(du)(du)不相上(shang)下,而(er)紅(hong)寶石激(ji)(ji)(ji)光(guang)(guang)器的(de)激(ji)(ji)(ji)光(guang)(guang)亮度(du)(du),能超過氙燈(deng)的(de)幾百億倍。因為(wei)激(ji)(ji)(ji)光(guang)(guang)的(de)亮度(du)(du)極(ji)高(gao)(gao),所以能夠照(zhao)(zhao)(zhao)亮遠(yuan)距(ju)離的(de)物體。紅(hong)寶石激(ji)(ji)(ji)光(guang)(guang)器發(fa)射(she)的(de)光(guang)(guang)束(shu)在(zai)月球上(shang)產(chan)生(sheng)的(de)照(zhao)(zhao)(zhao)度(du)(du)約為(wei)0.02勒(le)克(ke)斯(光(guang)(guang)照(zhao)(zhao)(zhao)度(du)(du)的(de)單位(wei)),顏色(se)鮮紅(hong),激(ji)(ji)(ji)光(guang)(guang)光(guang)(guang)斑明顯可見。若(ruo)用功率最(zui)強的(de)探照(zhao)(zhao)(zhao)燈(deng)照(zhao)(zhao)(zhao)射(she)月球,產(chan)生(sheng)的(de)照(zhao)(zhao)(zhao)度(du)(du)只有(you)約一萬億分之一勒(le)克(ke)斯,人(ren)眼根本(ben)無(wu)法察覺。激(ji)(ji)(ji)光(guang)(guang)亮度(du)(du)極(ji)高(gao)(gao)的(de)主要(yao)原因是定向發(fa)光(guang)(guang)。大量光(guang)(guang)子集中(zhong)(zhong)在(zai)一個(ge)極(ji)小的(de)空(kong)間范圍內射(she)出,能量密度(du)(du)自然極(ji)高(gao)(gao)。
3.顏色極純
光(guang)(guang)(guang)(guang)(guang)(guang)的(de)顏(yan)色(se)(se)由光(guang)(guang)(guang)(guang)(guang)(guang)的(de)波(bo)長(或頻率)決定。一(yi)(yi)定的(de)波(bo)長對應一(yi)(yi)定的(de)顏(yan)色(se)(se)。發(fa)射單(dan)(dan)種(zhong)顏(yan)色(se)(se)光(guang)(guang)(guang)(guang)(guang)(guang)的(de)光(guang)(guang)(guang)(guang)(guang)(guang)源(yuan)(yuan)稱為(wei)單(dan)(dan)色(se)(se)光(guang)(guang)(guang)(guang)(guang)(guang)源(yuan)(yuan),它發(fa)射的(de)光(guang)(guang)(guang)(guang)(guang)(guang)波(bo)波(bo)長單(dan)(dan)一(yi)(yi)。比如氪(ke)燈(deng)(deng)、氦燈(deng)(deng)、氖燈(deng)(deng)、氫(qing)燈(deng)(deng)等都(dou)是單(dan)(dan)色(se)(se)光(guang)(guang)(guang)(guang)(guang)(guang)源(yuan)(yuan),只發(fa)射某一(yi)(yi)種(zhong)顏(yan)色(se)(se)的(de)光(guang)(guang)(guang)(guang)(guang)(guang)。單(dan)(dan)色(se)(se)光(guang)(guang)(guang)(guang)(guang)(guang)源(yuan)(yuan)的(de)光(guang)(guang)(guang)(guang)(guang)(guang)波(bo)波(bo)長雖然單(dan)(dan)一(yi)(yi),但仍有一(yi)(yi)定的(de)分(fen)布范(fan)圍。如氪(ke)燈(deng)(deng)只發(fa)射紅光(guang)(guang)(guang)(guang)(guang)(guang),單(dan)(dan)色(se)(se)性很(hen)好,被譽為(wei)單(dan)(dan)色(se)(se)性之(zhi)冠,波(bo)長分(fen)布的(de)范(fan)圍仍有0.00001納米,因此(ci)氪(ke)燈(deng)(deng)發(fa)出的(de)紅光(guang)(guang)(guang)(guang)(guang)(guang),若仔細(xi)辨認仍包含有幾十(shi)種(zhong)紅色(se)(se)。由此(ci)可見(jian),光(guang)(guang)(guang)(guang)(guang)(guang)輻射的(de)波(bo)長分(fen)布區間越(yue)窄,單(dan)(dan)色(se)(se)性越(yue)好 。
激(ji)光(guang)加工是(shi)激(ji)光(guang)應用最有發展前途的領域,現在已開發出多種激(ji)光(guang)加工技術。激(ji)光(guang)加工有以下特(te)點:
1.激光(guang)加工(gong)(gong)(gong)(gong)(gong)屬(shu)無接(jie)觸(chu)(chu)加工(gong)(gong)(gong)(gong)(gong),激光(guang)加工(gong)(gong)(gong)(gong)(gong)是通過激光(guang)光(guang)束進行加工(gong)(gong)(gong)(gong)(gong),與被加工(gong)(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)(gong)件不直接(jie)接(jie)觸(chu)(chu),降低(di)了機械(xie)加工(gong)(gong)(gong)(gong)(gong)慣(guan)性和機械(xie)變形,方便了加工(gong)(gong)(gong)(gong)(gong)。同時,還可加工(gong)(gong)(gong)(gong)(gong)常規機械(xie)加工(gong)(gong)(gong)(gong)(gong)不能(neng)或很難(nan)實現的(de)加工(gong)(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)(gong)藝,如內雕、集成電(dian)路打微(wei)孔(kong)、硅片的(de)刻劃等。
2.加(jia)(jia)工(gong)質(zhi)量(liang)好,加(jia)(jia)工(gong)精度高(gao)(gao), 加(jia)(jia)工(gong)效(xiao)率(lv)(lv)(lv)高(gao)(gao),由于激(ji)(ji)光(guang)能(neng)量(liang)密度高(gao)(gao)可瞬(shun)時(shi)完成加(jia)(jia)工(gong),與傳統機(ji)(ji)械加(jia)(jia)工(gong)相比(bi)(bi),工(gong)件熱變形小、無機(ji)(ji)械變形,使得加(jia)(jia)工(gong)質(zhi)量(liang)顯(xian)著提(ti)高(gao)(gao);激(ji)(ji)光(guang)可通過光(guang)學聚(ju)焦鏡(jing)聚(ju)焦,激(ji)(ji)光(guang)加(jia)(jia)工(gong)光(guang)斑非常(chang)(chang)小,加(jia)(jia)工(gong)精度很高(gao)(gao),加(jia)(jia)工(gong)效(xiao)率(lv)(lv)(lv)高(gao)(gao),激(ji)(ji)光(guang)切(qie)割可比(bi)(bi)常(chang)(chang)規(gui)機(ji)(ji)械切(qie)割提(ti)高(gao)(gao)加(jia)(jia)工(gong)效(xiao)率(lv)(lv)(lv)幾(ji)十(shi)倍(bei)(bei)(bei)甚至(zhi)上百倍(bei)(bei)(bei);激(ji)(ji)光(guang)打孔(kong)特(te)別(bie)是(shi)微孔(kong)可比(bi)(bi)常(chang)(chang)規(gui)機(ji)(ji)械打孔(kong)提(ti)高(gao)(gao)效(xiao)率(lv)(lv)(lv)幾(ji)十(shi)倍(bei)(bei)(bei)至(zhi)上千倍(bei)(bei)(bei);激(ji)(ji)光(guang)焊接比(bi)(bi)常(chang)(chang)規(gui)焊接提(ti)高(gao)(gao)效(xiao)率(lv)(lv)(lv)幾(ji)十(shi)倍(bei)(bei)(bei);激(ji)(ji)光(guang)調阻可提(ti)高(gao)(gao)效(xiao)率(lv)(lv)(lv)上千倍(bei)(bei)(bei),且精度亦顯(xian)著提(ti)高(gao)(gao)。
3.材料利用(yong)率高、經(jing)濟效益高,激(ji)光(guang)(guang)(guang)加(jia)工(gong)與(yu)其他加(jia)工(gong)技(ji)術相比可(ke)節(jie)省(sheng)材料10~30?可(ke)直接節(jie)省(sheng)材料成(cheng)本費(fei),且激(ji)光(guang)(guang)(guang)加(jia)工(gong)設備操作維護成(cheng)本低(di),對加(jia)工(gong)費(fei)用(yong)降(jiang)低(di)提供了(le)先決(jue)條(tiao)件。激(ji)光(guang)(guang)(guang)加(jia)工(gong)具有(you)優越的(de)(de)加(jia)工(gong)性能,使(shi)得(de)激(ji)光(guang)(guang)(guang)加(jia)工(gong)技(ji)術得(de)到了(le)廣(guang)泛的(de)(de)應用(yong),并產生了(le)巨(ju)大的(de)(de)經(jing)濟效益和社(she)會效益。激(ji)光(guang)(guang)(guang)的(de)(de)空間控(kong)制性和時間控(kong)制性很(hen)好,對加(jia)工(gong)對象(xiang)的(de)(de)材質、形(xing)狀、尺(chi)寸和加(jia)工(gong)環境的(de)(de)自(zi)(zi)由度都(dou)很(hen)大,特別適用(yong)于(yu)自(zi)(zi)動化加(jia)工(gong)。
激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)加(jia)(jia)工(gong)系(xi)統(tong)與計算機(ji)數(shu)控(kong)技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)相結合可構成(cheng)(cheng)(cheng)高(gao)效(xiao)自動化加(jia)(jia)工(gong)設備,已(yi)經成(cheng)(cheng)(cheng)為企業(ye)實(shi)行適時生(sheng)產的(de)關鍵技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu),為優質、高(gao)效(xiao)和(he)低成(cheng)(cheng)(cheng)本(ben)的(de)加(jia)(jia)工(gong)生(sheng)產開辟了廣(guang)闊的(de)前景。目前已(yi)成(cheng)(cheng)(cheng)熟(shu)的(de)激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)加(jia)(jia)工(gong)技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)包(bao)括:激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)切割技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)、激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)焊接技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)、激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)打標技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)、激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)快(kuai)速成(cheng)(cheng)(cheng)形技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)、激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)打孔技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)、激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)去重(zhong)平衡技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)、激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)蝕刻技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)、激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)微(wei)調技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)、激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)存儲技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)、激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)劃線技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)、激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)清洗技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)、激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)熱(re)處(chu)理和(he)表面(mian)處(chu)理技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)等(deng)。 激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)在加(jia)(jia)工(gong)中有(you)很多的(de)應用(yong)(yong),生(sheng)產生(sheng)活中都有(you)應用(yong)(yong),下面(mian)簡單介紹幾種常(chang)見激(ji)(ji)(ji)(ji)(ji)(ji)光(guang)(guang)(guang)(guang)加(jia)(jia)工(gong)技(ji)(ji)(ji)(ji)術(shu)(shu)(shu)(shu)(shu)(shu)。
1.激光打孔
激(ji)光(guang)打孔(kong)(kong)技術具有精(jing)度高(gao)、通用(yong)(yong)(yong)性強、效率高(gao)、成木低(di)和綜合技術經(jing)濟效益(yi)顯著等(deng)優點(dian),已(yi)成為現代制(zhi)造(zao)領域(yu)的(de)(de)(de)(de)關鍵(jian)技術之一(yi),激(ji)光(guang)打孔(kong)(kong)在(zai)微(wei)(wei)(wei)細孔(kong)(kong)加工中的(de)(de)(de)(de)應用(yong)(yong)(yong),解(jie)決(jue)了一(yi)些傳統機械(xie)加工不能解(jie)決(jue)的(de)(de)(de)(de)難題(ti),為微(wei)(wei)(wei)孔(kong)(kong)加工提(ti)供了先進(jin)的(de)(de)(de)(de)加工手段。目前(qian),工業發(fa)達國(guo)家(jia)已(yi)將(jiang)激(ji)光(guang)深(shen)微(wei)(wei)(wei)孔(kong)(kong)技術大規模地應用(yong)(yong)(yong)到(dao)航空(kong)航天、汽車制(zhi)造(zao)、電子儀表(biao)、化工等(deng)行業。國(guo)內目前(qian)比較成熟的(de)(de)(de)(de)激(ji)光(guang)打孔(kong)(kong)的(de)(de)(de)(de)應用(yong)(yong)(yong)是在(zai)人(ren)造(zao)金剛石和天然金剛石拉扮(ban)模的(de)(de)(de)(de)生產及(ji)鐘表(biao)和儀表(biao)的(de)(de)(de)(de)寶石軸(zhou)承、吃機葉片、多層印(yin)刷線路板等(deng)行業的(de)(de)(de)(de)生產中。
激光打孔的特點:
1) 激光打孔速度快(kuai),效率高,經(jing)濟效益(yi)好;
2) 激光打孔可獲得大的深徑比;
3) 激光打孔可(ke)在硬、脆,軟等各(ge)類(lei)材(cai)料上(shang)進行(xing);
4) 激光打孔無工具損耗;
5) 激(ji)光可在難加(jia)工材料傾(qing)斜面上加(jia)工小孔;
6) 激光(guang)(guang)(guang)打(da)孔(kong)(kong)適(shi)合(he)于(yu)數量多、高密度(du)(du)的(de)(de)群(qun)孔(kong)(kong)加(jia)(jia)工(gong)(gong)。 另外,由(you)于(yu)激光(guang)(guang)(guang)打(da)孔(kong)(kong)過(guo)程與工(gong)(gong)件(jian)(jian)不(bu)接觸,因(yin)此(ci)加(jia)(jia)工(gong)(gong)出來(lai)(lai)的(de)(de)工(gong)(gong)件(jian)(jian)清潔,沒污染。因(yin)為這(zhe)種(zhong)打(da)孔(kong)(kong)是一種(zhong)蒸發型的(de)(de)、非(fei)接觸的(de)(de)加(jia)(jia)工(gong)(gong)過(guo)程,它(ta)消除了(le)常(chang)規熱(re)絲穿(chuan)孔(kong)(kong)和(he)機械穿(chuan)孔(kong)(kong)帶來(lai)(lai)的(de)(de)殘渣,因(yin)而(er)十(shi)分衛(wei)生(sheng)。而(er)且激光(guang)(guang)(guang)加(jia)(jia)工(gong)(gong)時(shi)間短,對被(bei)加(jia)(jia)工(gong)(gong)的(de)(de)材料氧化(hua)、變形、熱(re)影響(xiang)區(qu)域均較小(xiao),不(bu)需要特殊保護(hu)。激光(guang)(guang)(guang)不(bu)僅(jin)能對置(zhi)(zhi)于(yu)空氣中的(de)(de)工(gong)(gong)件(jian)(jian)打(da)孔(kong)(kong),而(er)且也(ye)能對置(zhi)(zhi)于(yu)真空中或其(qi)它(ta)條(tiao)件(jian)(jian)下的(de)(de)工(gong)(gong)件(jian)(jian)進行打(da)孔(kong)(kong)。目前(qian),激光(guang)(guang)(guang)打(da)孔(kong)(kong)朝著(zhu)多樣(yang)化(hua)、高速(su)度(du)(du)、孔(kong)(kong)徑(jing)更微小(xiao)的(de)(de)方向發展(zhan)。
2.激光快速成型
傳統的工業成型(xing)(xing)(xing)技(ji)(ji)術(shu)大部(bu)分是(shi)遵循(xun)“去(qu)除(chu)法(fa)”的,如車(che)削、銑(xian)削、鉆削、磨削、刨削;另外(wai)一些是(shi)采用模具進行成形,如鑄造(zao)、沖壓。激(ji)(ji)光(guang)快(kuai)速成形技(ji)(ji)術(shu)集成了激(ji)(ji)光(guang)技(ji)(ji)術(shu)、CAD/CAM技(ji)(ji)術(shu)和材料技(ji)(ji)術(shu)的最新成果,根據計算機設計出的零(ling)件的模型(xing)(xing)(xing)立體(ti)圖,直接(jie)(jie)制造(zao)出模型(xing)(xing)(xing),它制造(zao)模型(xing)(xing)(xing)的辦法(fa)是(shi)在(zai)一層(ceng)接(jie)(jie)一層(ceng)的基礎上不斷(duan)添加(jia)材料。激(ji)(ji)光(guang)快(kuai)速成型(xing)(xing)(xing)法(fa)有,液態(tai)光(guang)敏(min)聚合(he)物選(xuan)擇性(xing)固化、薄(bo)型(xing)(xing)(xing)材料選(xuan)擇性(xing)切(qie)割、扮(ban)狀材料選(xuan)擇性(xing)熔(rong)復、粉(fen)末(mo)材料選(xuan)擇性(xing)燒結(jie)。
激光快(kuai)(kuai)速(su)(su)(su)成(cheng)型(xing)技術(shu)(shu)在模(mo)(mo)具(ju)(ju)(ju)(ju)制(zhi)造中的(de)(de)(de)(de)應(ying)用(yong)最為(wei)廣泛,可以(yi)用(yong)快(kuai)(kuai)速(su)(su)(su)成(cheng)型(xing)件直接用(yong)作模(mo)(mo)具(ju)(ju)(ju)(ju);用(yong)快(kuai)(kuai)速(su)(su)(su)成(cheng)型(xing)件作母模(mo)(mo),翻制(zhi)軟模(mo)(mo)具(ju)(ju)(ju)(ju);用(yong)快(kuai)(kuai)速(su)(su)(su)成(cheng)件翻制(zhi)硬(ying)模(mo)(mo)具(ju)(ju)(ju)(ju)。用(yong)快(kuai)(kuai)速(su)(su)(su)成(cheng)技術(shu)(shu)制(zhi)作模(mo)(mo)具(ju)(ju)(ju)(ju),既避(bi)開了復雜的(de)(de)(de)(de)機械切削(xue)加工(gong),又可以(yi)保證模(mo)(mo)具(ju)(ju)(ju)(ju)的(de)(de)(de)(de)精(jing)度(du),還可以(yi)大大縮知制(zhi)模(mo)(mo)時間、節(jie)省制(zhi)模(mo)(mo)費用(yong),對于形(xing)狀復雜的(de)(de)(de)(de)精(jing)度(du)模(mo)(mo)具(ju)(ju)(ju)(ju),其(qi)優點尤為(wei)突出(chu)。該(gai)技術(shu)(shu)已(yi)在航(hang)(hang)空航(hang)(hang)天、電(dian)子(zi)、汽車、家電(dian)等工(gong)業領域(yu)得到廣泛應(ying)用(yong)。但是,目前還存在著模(mo)(mo)具(ju)(ju)(ju)(ju)壽(shou)命相對較(jiao)知的(de)(de)(de)(de)缺點,即使是金屬面、硬(ying)背襯模(mo)(mo)具(ju)(ju)(ju)(ju),其(qi)使用(yong)壽(shou)命也不及真(zhen)止的(de)(de)(de)(de)金屬模(mo)(mo),所以(yi)快(kuai)(kuai)速(su)(su)(su)成(cheng)模(mo)(mo)具(ju)(ju)(ju)(ju)較(jiao)適合(he)于單件小批量生產。
3.激光切割
激(ji)(ji)光切割(ge)(ge)是利用激(ji)(ji)光束(shu)聚(ju)焦形成的高功率(lv)密度光斑,將(jiang)材料快速加(jia)熱(re)至氣(qi)化溫度,蒸發形成小孔洞后(hou),再使光束(shu)與(yu)材料相對運動,從而獲得窄的連續(xu)切縫(feng)。在20世紀(ji)80年代就開始在汽車(che)車(che)身制造中應用。激(ji)(ji)光切割(ge)(ge)還廣(guang)泛用于非金(jin)屬材料的切割(ge)(ge),另外(wai)激(ji)(ji)光切割(ge)(ge)也(ye)廣(guang)泛用于服裝行(xing)業,對皮(pi)革、布(bu)料進行(xing)切割(ge)(ge)。
4.激光焊接
激(ji)(ji)光焊(han)(han)接(jie)(jie)是將功率密度足夠的激(ji)(ji)光束照射(she)到(dao)需要焊(han)(han)接(jie)(jie)的材料表面(mian),使其局部(bu)溫度升高到(dao)熔點,被(bei)(bei)焊(han)(han)材料結合部(bu)位熔化成液(ye)體,然(ran)后冷(leng)卻凝固,于(yu)是兩種(zhong)材料就被(bei)(bei)熔接(jie)(jie)在一起(qi)。激(ji)(ji)光焊(han)(han)接(jie)(jie)技(ji)術(shu)應用領(ling)域迅速擴到(dao)航(hang)空航(hang)天(tian)、船舶(bo)制造(zao)(zao)、機(ji)車制造(zao)(zao)、機(ji)械零件制造(zao)(zao)等領(ling)域。珠寶首(shou)飾(shi)(shi)業引用了激(ji)(ji)光焊(han)(han)接(jie)(jie)技(ji)術(shu),改變(bian)了人們傳統的首(shou)飾(shi)(shi)設計思維(wei)方式。借助激(ji)(ji)光焊(han)(han)接(jie)(jie)技(ji)術(shu),可制作一些結構特殊的首(shou)飾(shi)(shi)款式。另(ling)外(wai)激(ji)(ji)光焊(han)(han)接(jie)(jie)也廣泛用于(yu)鋼鐵行業,如(ru)硅板(ban)焊(han)(han)接(jie)(jie),冷(leng)軋低碳鋼的焊(han)(han)接(jie)(jie),鋼管的焊(han)(han)接(jie)(jie)。
5.激光打標
激光打標(biao)(biao)技(ji)術是激光加工最(zui)大的應用(yong)領域之一。激光打標(biao)(biao)是利(li)用(yong)高能量(liang)密度的激光對工件進行局部照(zhao)射,使表層(ceng)材料汽化或發生顏色變化的化學反應,從而留下永久性(xing)標(biao)(biao)記的一種打標(biao)(biao)方(fang)法,這對產品的防偽有(you)特(te)殊(shu)的意(yi)義。激光加工系統與(yu)計(ji)(ji)算機數(shu)控技(ji)術相結(jie)合可(ke)構(gou)成(cheng)高效自(zi)動化加工設(she)備,可(ke)以打出各(ge)種文字、符號和圖案(an),易于用(yong)軟件設(she)計(ji)(ji)標(biao)(biao)刻圖樣,更改(gai)標(biao)(biao)記內(nei)容,適(shi)應現(xian)代化生產高效率(lv)、快節奏的要(yao)求(qiu)。可(ke)實(shi)現(xian)亞微(wei)米打標(biao)(biao),已廣泛(fan)用(yong)于微(wei)電子工業和生物工程。
6.激光雕刻
在激(ji)光(guang)技(ji)術中激(ji)光(guang)雕刻技(ji)術是(shi)較(jiao)常見的。激(ji)光(guang)雕刻的實現主要是(shi)利(li)用(yong)激(ji)光(guang)束在材料表面的熔蝕效應(ying)、氣化(hua)效應(ying)、光(guang)化(hua)學反應(ying)。激(ji)光(guang)雕刻廣泛的應(ying)用(yong)工藝品、陶瓷(ci)、皮革、印章等的雕刻。
7.激光熱處理
激(ji)(ji)(ji)(ji)(ji)光(guang)熱(re)處(chu)理(li)(li)是利用(yong)高功(gong)率密度(du)(du)的激(ji)(ji)(ji)(ji)(ji)光(guang)束對(dui)金屬進(jin)行表面(mian)(mian)(mian)處(chu)理(li)(li)的方法。如當把金屬表面(mian)(mian)(mian)加熱(re)到(dao)(dao)僅低于熔點的臨界轉變(bian)(bian)(bian)溫度(du)(du)時,其表面(mian)(mian)(mian)迅速奧氏(shi)體化(hua),然后急(ji)速自冷(leng)淬火(huo),金屬表面(mian)(mian)(mian)迅速被強化(hua),即激(ji)(ji)(ji)(ji)(ji)光(guang)相變(bian)(bian)(bian)硬(ying)(ying)化(hua)(激(ji)(ji)(ji)(ji)(ji)光(guang)淬火(huo)) 。激(ji)(ji)(ji)(ji)(ji)光(guang)表面(mian)(mian)(mian)熱(re)處(chu)理(li)(li)技(ji)(ji)(ji)術包括激(ji)(ji)(ji)(ji)(ji)光(guang)相變(bian)(bian)(bian)硬(ying)(ying)化(hua)技(ji)(ji)(ji)術、激(ji)(ji)(ji)(ji)(ji)光(guang)涂(tu)覆技(ji)(ji)(ji)米、激(ji)(ji)(ji)(ji)(ji)光(guang)合金化(hua)技(ji)(ji)(ji)術、激(ji)(ji)(ji)(ji)(ji)光(guang)沖擊(ji)強化(hua)技(ji)(ji)(ji)術等(deng),這些技(ji)(ji)(ji)術對(dui)改變(bian)(bian)(bian)材料的機械性(xing)能(neng)、耐熱(re)性(xing)和耐腐(fu)蝕(shi)性(xing)等(deng)有重(zhong)要作用(yong)。經激(ji)(ji)(ji)(ji)(ji)光(guang)處(chu)理(li)(li)后,鑄鐵表面(mian)(mian)(mian)硬(ying)(ying)度(du)(du)可(ke)以達(da)到(dao)(dao) HRC60度(du)(du)以上。中碳及高碳的碳鋼,表面(mian)(mian)(mian)硬(ying)(ying)度(du)(du)可(ke)達(da)HRC70度(du)(du)以上,從而(er)提高了材料的抗(kang)磨性(xing)、抗(kang)疲勞、抗(kang)氧化(hua)、耐腐(fu)蝕(shi)等(deng)性(xing)能(neng)同,延(yan)長其使(shi)用(yong)壽命(ming)。激(ji)(ji)(ji)(ji)(ji)光(guang)熱(re)處(chu)理(li)(li)技(ji)(ji)(ji)術與其它熱(re)處(chu)理(li)(li)如高頻淬火(huo),滲(shen)(shen)碳,滲(shen)(shen)氮(dan)等(deng)傳(chuan)統工藝(yi)相比,具有以下特(te)點:
1) 無需(xu)使用外加材料(liao),僅改變被處理材料(liao)表面的組織結構。處理后(hou)的改性(xing)層具(ju)有足夠的厚度,可根據需(xu)要(yao)調(diao)整深淺一般可達0.1~0.8mm。
2) 處理(li)層和墓體結(jie)合強度高。激光表面處理(li)的改性(xing)層和基體材(cai)料之間是致密的冶金(jin)結(jie)合,而且處理(li)層表面是致密的冶金(jin)組織,具有較高的硬度和耐磨(mo)性(xing)。
3) 被處理件(jian)變形(xing)極小。由于激光功率密(mi)度高,與(yu)零(ling)件(jian)的(de)作用時間極短(duan),故零(ling)件(jian)的(de)熱變形(xing)區和(he)整體(ti)變化(hua)都很小。故適(shi)合于高精度零(ling)件(jian)處理。作為材料和(he)零(ling)件(jian)的(de)最后處理工序等。
4) 加工柔性好,適用(yong)(yong)(yong)(yong)面廣。利(li)用(yong)(yong)(yong)(yong)靈活的(de)導(dao)光(guang)系(xi)統可隨意(yi)將激(ji)光(guang)導(dao)向處(chu)理(li)(li)部(bu)分,從而可方便地處(chu)理(li)(li)深孔、內孔、盲(mang)孔和凹槽等(deng),也可進行(xing)選(xuan)擇性的(de)局部(bu)處(chu)理(li)(li)等(deng)。由(you)于激(ji)光(guang)熱(re)處(chu)理(li)(li)有相當明顯的(de)優點,解(jie)(jie)決(jue)了(le)傳(chuan)統金屬(shu)熱(re)處(chu)理(li)(li)不能(neng)解(jie)(jie)決(jue)或(huo)不容易解(jie)(jie)決(jue)的(de)技(ji)術難題,在(zai)國(guo)內外受到高(gao)度重視(shi),激(ji)光(guang)熱(re)處(chu)理(li)(li)得(de)到迅速的(de)發展。激(ji)光(guang)熱(re)處(chu)理(li)(li)技(ji)術在(zai)汽車工業中應用(yong)(yong)(yong)(yong)廣泛(fan),如缸套、曲軸、活塞環(huan)、換向器、齒輪等(deng)零部(bu)件的(de)熱(re)處(chu)理(li)(li),同時在(zai)航空航天(tian)、機床(chuang)行(xing)業和其它機械行(xing)業也應用(yong)(yong)(yong)(yong)廣泛(fan)。
8.激光精密加工
激光由于其優良的光束特性, 自誕生以來, 就在工業加工領域起著非常重要的作用, 并且不斷地深入到工業生產的各個領域, 以其獨特的優越性, 成為未來制造業的重要加工手段, 被譽為21世紀! 的加工技術。激光精密加工是利用高強度的激光束, 經光學系統聚焦后, 激光束的功率密度達到104~1011W/cm2,加工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)件置(zhi)于激光(guang)束焦點附(fu)近, 通過激光(guang)束與加工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)件的相對(dui)(dui)運動(dong)來實現對(dui)(dui)加工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)件的熱(re)加工(gong)(gong)(gong)(gong), 加工(gong)(gong)(gong)(gong)精度一般(ban)在幾微米(mi)到數十微米(mi)。
激(ji)光(guang)(guang)(guang)束可以聚(ju)焦到很(hen)小的尺寸(cun), 所(suo)以特別(bie)適(shi)合于精(jing)密加(jia)(jia)工(gong)(gong)(gong)。激(ji)光(guang)(guang)(guang)精(jing)密加(jia)(jia)工(gong)(gong)(gong)所(suo)用激(ji)光(guang)(guang)(guang)器(qi)為各種脈(mo)沖(chong)或調Q 固體激(ji)光(guang)(guang)(guang)器(qi), 半導體激(ji)光(guang)(guang)(guang)器(qi), 脈(mo)沖(chong)Nd ?YAG 激(ji)光(guang)(guang)(guang)器(qi)以及最近幾(ji)年(nian)開始不斷推廣的光(guang)(guang)(guang)纖(xian)激(ji)光(guang)(guang)(guang)器(qi)和(he)紫外激(ji)光(guang)(guang)(guang)器(qi)等。各種脈(mo)沖(chong)激(ji)光(guang)(guang)(guang)器(qi)的聚(ju)焦光(guang)(guang)(guang)斑很(hen)小, 功率密度很(hen)大, 工(gong)(gong)(gong)件加(jia)(jia)熱(re)范圍小, 加(jia)(jia)工(gong)(gong)(gong)精(jing)度和(he)定位精(jing)度高(gao)而且熱(re)影響區小。
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