3、加工中心的主要加工對(duì)象,加工中心適用于形狀復(fù)雜、工序多、精度要求高、需要多種類型普通機(jī)床經(jīng)過多次安裝才能完成加工的零件。其主要加工對(duì)象為：箱體類零件復(fù)雜曲面類零件異形件板、套、盤類零件特殊加工,第五節(jié)加工中心編程實(shí)例,例1：加工如圖所示的平面凸輪輪廓，毛坯材料為中碳鋼，尺寸如圖7.5所示。零件圖中23mm深的半圓槽和外輪廓不加工，只討論凸輪內(nèi)滾子槽輪廓的加工程序。,凸輪毛坯,1、工藝分析裝夾：以45的孔和K面定位在，專用夾具裝夾。刀具：用三把25的四刃硬質(zhì)合金錐柄端銑刀，分別用于粗加工(T03)、半精加工(T04)和精加工(T05)。為保證順利下刀到要求的槽深，要先用鉆頭鉆出底孔，然后再用鍵槽銑刀將孔底銑平，因此還要一把25的麻花鉆(T01)和一把25的鍵槽銑刀(T02)。工步：為達(dá)到圖紙要求的表面粗糙度，分粗銑、半精銑、精銑三個(gè)工步完成加工。半精銑和精銑單邊余量分別為11.5mm和0.10.2mm。在安排上，根據(jù)毛坯材料和機(jī)床性能，粗加工分兩層加工完成，以避免Z向吃刀過深。半精加工和精加工不分層，一刀完成。刀具加工路線選擇順銑，可避免在粗加工時(shí)發(fā)生扎刀劃傷加工面，而且在精銑時(shí)還可以提高表面光潔程度。,第五節(jié)加工中心編程實(shí)例,切削參數(shù)：根據(jù)毛坯材料、刀具材料和機(jī)床特性，選擇如表7.1所示的切削參數(shù)。,表7.1切削參數(shù),第五節(jié)加工中心編程實(shí)例,2、數(shù)據(jù)計(jì)算選擇45孔的中心為編程原點(diǎn)，考慮到該零件關(guān)于Y對(duì)稱，因此只計(jì)算+X一側(cè)的基點(diǎn)坐標(biāo)即可。計(jì)算時(shí)使用計(jì)算機(jī)繪圖軟件求出。如圖所示。,第五節(jié)加工中心編程實(shí)例,3、加工程序,O0070(主程序)(鉆底孔)N10G91G28Z0T01M06N20G90G00X134.889Y32.072S250N30G43G00Z100.0H01M03N40G01Z2.0F1000M08N50G73Z-25.0R2.0Q2.0F25N60G80G00Z250.0M09,第五節(jié)加工中心編程實(shí)例,3、加工程序,(銑平下刀位)N70G91G28Z0T02M06N80G90G00X134.889Y32.072S250N90G43G00Z100.0H02M03N100G01Z2.0F1000M08N110Z-20.0F100N120Z25.0F20N130G91G01X5.0F20N140G02I-5.0(銑整圓)N150G01X-5.0F100N160G90G00Z250.0M09,第五節(jié)加工中心編程實(shí)例,2019/12/12,8,可編輯,3、加工程序,(粗銑第一層)N170G91G28Z0T03M06N180G90G00X134.889Y32.072S400N190G43Z100.0H03M03N200G01Z5.0F1000M08N210Z-12.5F100N220G42D03G01X92.025Y57.248F30(半徑補(bǔ)償11.5)N230M98P0001N240G40G01X134.889Y32.072F100N250M01N260G42D03G01X142.151Y15.563F30N270M98P0002N280G40G01Z5.0F1000N290M01,第五節(jié)加工中心編程實(shí)例,3、加工程序,(粗銑第二層)N300G01X134.889Y32.072N310Z-25.0F50N320G42D03G01X92.025Y57.248F30N330M98P0001N340G40G01X134.889Y32.072F100N350M01N360G42D03G01X142.151Y15.563F30N370M98P0002N380G40G01Z5.0F1000N390M01,第五節(jié)加工中心編程實(shí)例,3、加工程序,(半精銑)N400G91G28Z0T04M06N410G90G00X134.889Y32.072S400N420G43G00Z100.0H04M03N430G01Z5.0F1000M08N440Z-25.0F100N450G42D04G01X92.025Y57.248F30(半徑補(bǔ)償12.35)N460M98P0001N470G40G01X134.889Y32.072F100N480M01N490G42D04G01X142.151Y15.563F30N500M98P0002N510G40G01Z5.0F1000N520G00Z200.0M09,第五節(jié)加工中心編程實(shí)例,3、加工程序,(精銑)N530G91G28Z0T05M06N540G90G00X134.889Y32.072S400N550G43G00Z100.0H05M03N560G01Z5.0F1000M08N570Z-25.0F100N580G42D05G01X92.025Y57.248F30(半徑補(bǔ)償12.35)N590M98P0001N600G40G01X134.889Y32.072F100N610M01N620G42D05G01X142.151Y15.563F30N630M98P0002N640G40G01Z5.0F1000N650G00Z200.0M09N660M30,第五節(jié)加工中心編程實(shí)例,3、加工程序,O0001(外側(cè)輪廓逆時(shí)針子程序)N10G02X75.795Y66.755R30N20G03X-75.795Y66.755R101N30G02X-92.025Y57.248R30N40G03X-134.889Y32.072R79N50G03X-142.151Y15.563R30N60G03X142.151Y15.563R-143N70G03X134.889Y32.072R30N80G03X92.025Y57.248R79N90M99,第五節(jié)加工中心編程實(shí)例,3、加工程序,O0002(內(nèi)側(cè)輪廓順時(shí)針子程序)N10G03X-142.151Y15.563R-143N20G03X-134.889Y32.072R30N30G02X-92.025Y57.248R79N40G03X-75.795Y66.755R30N