鋸床數控改造

　　鋸床數控改造

普通帶鋸床的改造

鋸削下料長度通過調節標尺14與(yu)返(fan)回(hui)到(dao)位(wei)開(kai)關(guan)的(de)相(xiang)對(dui)位(wei)置(zhi)來(lai)實(shi)現(xian)，下(xia)料(liao)數(shu)量(liang)由(you)計(ji)數(shu)器(qi)實(shi)現(xian)，各(ge)動(dong)作(zuo)的(de)完(wan)成(cheng)由(you)到(dao)位(wei)開(kai)關(guan)檢(jian)測(ce)。鋸(ju)削(xue)速(su)度(du)由(you)調(tiao)壓(ya)閥(fa)調(tiao)整(zheng)供(gong)油(you)壓(ya)力(li)進(jin)行(xing)控(kong)製(zhi)。各(ge)動(dong)作(zuo)的(de)邏(luo)輯(ji)關(guan)係(xi)由(you)繼(ji)電(dian)器(qi)完(wan)成(cheng)，驅(qu)動(dong)由(you)動(dong)力(li)油(you)缸(gang)完(wan)成(cheng)

，控(kong)製(zhi)由(you)電(dian)磁(ci)閥(fa)完(wan)成(cheng)。

對dui於yu普pu通tong帶dai鋸ju床chuang而er言yan，由you於yu壓ya力li的de變bian化hua，液ye壓ya油you溫wen度du的de變bian化hua以yi及ji電dian磁ci閥fa和he繼ji電dian器qi的de滯zhi後hou都dou影ying響xiang鋸ju削xue送song料liao的de精jing度du，因yin此ci下xia料liao精jing度du差cha，批pi量liang下xia料liao的de一yi致zhi性xing也ye不bu好hao。此ci外wai
，在zai改gai變bian普pu通tong帶dai鋸ju床chuang下xia料liao長chang度du時shi，由you於yu需xu調tiao整zheng送song料liao長chang度du標biao尺chi，操cao作zuo也ye比bi較jiao繁fan瑣suo。

由於鋸削的材料、jutiaoxingnengdechayi
，zuihaoduijutiaodesuduhejuxuesudunengshishizidongtiaozheng。biru，dangjutiaowanqudadaoxitongdeyidingfayuzhishi
，xitongjiujiangdisuduzishiyinghuoguanbijingei。zhexuyaozaiyuanyouputongdaijuchuangdejichuzuojiaodadegaidong
，ru：改gai變bian原yuan有you的de液ye壓ya單dan元yuan，增zeng加jia鋸ju條tiao彎wan曲qu監jian控kong器qi等deng。在zai原yuan普pu通tong鋸ju床chuang上shang裝zhuang配pei光guang柵zha尺chi進jin行xing位wei置zhi測ce量liang，原yuan液ye壓ya係xi統tong不bu變bian。控kong製zhi係xi統tong軟ruan件jian安an全quan功gong能neng設she計ji，包bao括kuo料liao倉cang、儲料管理檢索

、鋸件分類管理、鋸條彎曲監控、材料壓緊、鋸條速度、鋸削進給速度的自適應控製等。為了能同時滿足不改變原液壓係統的要求，係統增加了基於普通電磁閥的位置控製模塊。

係統控製改造

伺服係統的閉環位置控製是比較容易的。普通電磁閥隻有“通”、“斷”兩liang種zhong狀zhuang態tai，並bing且qie具ju有you電dian磁ci機ji械xie滯zhi後hou。液ye壓ya油you的de溫wen度du及ji壓ya力li變bian化hua影ying響xiang到dao送song料liao滑hua台tai的de定ding位wei

，因yin此ci采cai用yong傳chuan統tong的de控kong製zhi理li論lun進jin行xing處chu理li比bi較jiao困kun難nan。為wei使shi到dao達da目mu標biao位wei置zhi前qian關guan閉bi送song料liao油you缸gang液ye壓ya進jin給gei，使shi送song料liao油you缸gang停ting止zhi時shi剛gang好hao在zai目mu標biao位wei置zhi

，是shi問wen題ti的de關guan鍵jian。

係統伺服位置控製模塊采用采樣插補和預見控製相結合的位置控製（具體控製略）。而普通電磁閥油缸的位置控製模塊采用學習、yujiankongzhi

，tongguoxitongjingyanzhihedangqianzhuangtai，juedingguanbisongliaoyougangdeweizhi，shisongliaoyougangtingzhishiganghaodadaomubiaoweizhi。youyudiancijixiezhihoujiyundongguanxing
，tongguo“通”“斷”控製送料滑台移動0.1mm幾乎不可能的。為了保證最小送料長度及送料精度，後鉗使送料滑台後退到到LK位置，然後向前移動到預測位置LT關(guan)閉(bi)送(song)料(liao)電(dian)磁(ci)閥(fa)。當(dang)送(song)料(liao)油(you)缸(gang)運(yun)動(dong)停(ting)止(zhi)時(shi)後(hou)鉗(qian)夾(jia)緊(jin)。後(hou)鉗(qian)夾(jia)緊(jin)到(dao)位(wei)時(shi)前(qian)鉗(qian)鬆(song)開(kai)，前(qian)鉗(qian)鬆(song)開(kai)到(dao)位(wei)時(shi)開(kai)始(shi)送(song)料(liao)。送(song)料(liao)到(dao)位(wei)後(hou)前(qian)鉗(qian)夾(jia)。前(qian)鉗(qian)夾(jia)緊(jin)到(dao)位(wei)時(shi)後(hou)鉗(qian)鬆(song)開(kai)。後(hou)鉗(qian)鬆(song)到(dao)位(wei)後(hou)開(kai)始(shi)後(hou)退(tui)，為(wei)下(xia)一(yi)次(ci)送(song)料(liao)作(zuo)準(zhun)備(bei)。雖(sui)然(ran)係(xi)統(tong)定(ding)位(wei)多(duo)移(yi)動(dong)了(le)距(ju)離(li)2X（LK-L）
，但整個過程與鋸削過程並列進行。