[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fdA5GkFhkZxop6gTm9Wij2ct8Sx-PS2pQ3EpBguFRSLI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":24,"type":25},[],"2025-11-26 09:53:43",242176482,[8,9,10,11],"结构紧凑、悬伸短,因为车床夹具是随着主轴一起回转的,重心应尽可能靠近主轴端部,以减少惯性力和回转力矩","为避免回转时产生离心力而引起震动对车床夹具应满足平衡要求","为防止夹具旋转惯性力使夹紧力减小导致回转过程中夹紧元件松脱,要设计好可靠的自锁结构","夹具与机床的联接要准确、可靠,避免安装引起的加工误差",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},72,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_46313746","模块五章节测验","关于车床夹具的设计总体要求,下列说法正确的有",[21,26,35,44,53,62,72,82,91,100],{"answer":22,"createTime":5,"id":6,"options":23,"question":19,"source":24,"type":25},[],[8,9,10,11],"v1",1,{"answer":27,"createTime":5,"id":28,"options":29,"question":34,"source":24,"type":25},[],242176483,[30,31,32,33],"设置配重块","在配重块上开弧形槽或径向槽","加工减重孔","减小悬伸长度","对角铁式等结构不对称的车床夹具,设计时应采取平衡措施,使夹具的重心落在主轴回转轴线上,以减少主轴轴承的磨损,避免因离心力产生振动而影响加工质量和刀具寿命.平衡的方法有( )",{"answer":36,"createTime":5,"id":37,"options":38,"question":43,"source":24,"type":25},[],242176484,[39,40,41,42],"定位元件表面对夹具回转轴线或找正圆环面的圆跳动","定位元件表面对顶尖或锥柄轴线的圆跳动","定位元件表面之间和对夹具安装基面的垂直度或平行度","定位元件的轴线对夹具轴线的对称度","除一般的技术要求外,车床夹具要注意以下 技术要求",{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":24,"type":25},[],242176485,[48,49,50,51],"两挡销4","靠模滚轮5","滑座6","底座7","如下图所示为溜板油槽靠模铣床夹具.工件以底面和侧面在 上定位. \u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fee5a34596e9dac54a1b055253b66e65d.png\">",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":24,"type":25},[],242176486,[57,58,59,60],"开有油槽的圆柱形镗杆","开直槽的镗杆","开螺旋槽的镗杆","镶条式镗杆","如下图所示为用于固定式镗套的镗杆导向部分结构.当镗杆导向部分直径d<50mm时,一般采用 结构.\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F9d648b25c8d79389de3950228456f700.png\">",{"answer":63,"createTime":5,"id":64,"options":65,"question":71,"source":24,"type":25},[],242176487,[66,67,68,69,70],"为便于制造,支架与底座应分开,一般采用铸铁材料,不宜采用焊接结构","支承架有较大的安装基面并设有必要的加强筋,支承装配面的宽度B沿孔轴向,B=2H","支架厚度应根据高度h来确定,一般取15~25 mm","支架与底座需要用圆柱销来定位,并用螺钉来紧固","不能在镗模支座上安装夹紧机构,以免夹紧反力使得镗模变形,影响镗孔精度","镗模支架安装镗套和承受切削力,应有足够的强度和刚度,设计时应注意",{"answer":73,"createTime":5,"id":74,"options":75,"question":80,"source":24,"type":81},[],242176488,[76,77,78,79],"心轴类车床夹具适用于以工件内孔定位,加工套类、盘类等回转体零件,主要用于保证工件被加工表面(一般是外圆)与定位基准(一般是内孔)间的同轴度","按照与机床主轴联接方式的不同,心轴类车床夹具可分为顶尖式心轴车床夹具和锥柄式心轴车床夹具两种.前者用于加工长筒形工件,后者仅能加工短的套筒或盘状工件,且结构简单,因此,经常采用","心轴类车床夹具结构不对称,用于加工壳体、支座、杠杆、接头等零件上的回转面和端面","心轴类车床夹具上心轴的定位表面根据工件定位基准的精度和工序加工要求,可设计成圆柱面、圆锥面、可胀圆柱面以及花键等特形面.常用的有圆柱心轴和弹性心轴","关于心轴类类车床夹具,下列说法错误的是",0,{"answer":83,"createTime":5,"id":84,"options":85,"question":90,"source":24,"type":81},[],242176489,[86,87,88,89],"花盘类车床夹具的基本特征是夹具体为一大圆盘形零件","花盘类车床夹具装夹的工件一般形状较复杂","花盘类车床夹具加工的零件大多是以外圆(或内孔)及端面定位的对称零件,多采用定心夹紧机构","工件的定位基准多数是圆柱面和与圆柱面垂直的端面,因而夹具对工件多数是端面定位、轴向夹紧","关于花盘类车床夹具,下列说法错误的是",{"answer":92,"createTime":5,"id":93,"options":94,"question":99,"source":24,"type":81},[],242176490,[95,96,97,98],"定位器1","滑块2","卡爪5","轴向定位器6","如下图所示为两爪定心夹紧卡盘,更换 即可用来装夹不同的工件.(1—定位器;2—圆盘;3—左右螺杆;4—滑块;5—卡爪;6—轴向定位器)\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F60756fb4dc4af235d49afe1f9565282d.png\">",{"answer":101,"createTime":5,"id":102,"options":103,"question":108,"source":24,"type":81},[],242176491,[104,105,106,107],"单面前导向","单面后导向","双面单导向","单面双导向","说明下图所示是 镗模结构图.\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Faf85bbe03cdfbe53d12a0c91c6a17b92.jpg\">"]