【判断题】【消耗次数:1】
为确定工件相对于刀具的位置,应将工件置于机床或夹具中定位。只要被约束的自由度少于6个,则该定位属于欠定位
正确
错误
参考答案:
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相关题目
【判断题】 工件在夹具中定位时,应使工件的定位表面与夹具的定位元件相贴合,从而消除自由度。
①  正确
②  错误
【单选题】 工件在夹具中定位,长V形块能限制工件的()个自由度。
①  2个
②  3个
③  4个
④  5个
【判断题】 工件在夹具中定位,有六个定位支承点就消除了六个自由度即为完全定位。
①  正确
②  错误
【判断题】 采用六个支承钉进行工件定位,则限制了工件的6个自由度。
①  正确
②  错误
【判断题】 夹具上的两个或两个以上的定位元件,重复限制工件的同一个或几个自由度的情况,称为欠定位,该说法( )
①  正确
②  错误
【单选题】 .工件在定位中出现欠定位,是因为()。
①  实际被限制自由度数大于加工所要求限制的自由度数
②  实际限制自由度数大于六点
③  实际限制自由度数少于六点
④  加工所要求限制的自由度定位中没有被限制
【单选题】 工件在定位中出现欠定位,是因为()。
①  实际被限制自由度数大于加工所要求限制的自由度数
②  实际限制自由度数大于六点
③  实际限制自由度数少于六点
④  加工所要求限制的自由度定位中没有被限制
【判断题】 点位控制机床是指仅控制刀具相对于工件的定位点坐标,不规定刀具的运动轨迹的数控机床。
①  正确
②  错误
【判断题】 工件在加工前,使其在机床上或夹具中获得正确而固定位置的过程称为安装。
①  正确
②  错误
【单选题】 定位元件为长圆柱销时,可限制工件()个自由度。
①  2
②  1
③  5
④  4
随机题目
【单选题】 Nothing in my life has meant ____ to me as his praise.
①  asmuch
②  more
③  thatmuch
④  asgood
【单选题】 After the 1980s, the West became Godlike to many Chinese because of ____ Westerners’ wealth, and ____ freedom to do what they wanted.
①  /;/
②  the;the
③  the;/
④  /;the
【单选题】 Shanghai is the first city in the world ____a high-speed maglev train, from the city to Pudong Airport.
①  tobuild
②  tobebuilt
③  tohavebuilt
④  tohavebeenbuilt
【单选题】 The size of the generation gap seems to be spreading with ____ rapid changes in technology, in education, in transportation and in communication that are taking place all over ____ globe.
①  the;the
②  the;/
③  /;/
④  /;the
【单选题】 Never in my wildest dreams ____ lead to a career in the NBA, which has allowed me to give back to my people in Africa.
①  Ithoughtthechancewould
②  Ithoughtwouldthechance
③  didIthinkthechancewould
④  didIthinkwouldthechance
【单选题】 Small as it is, the ant is as much a creature as ____ all other animals on the earth.
①  are
②  is
③  have
④  do
【单选题】 She’s fainted. Throw some water on her face and she’ll ____.
①  comeround
②  comealong
③  comeon
④  comeout
【单选题】 The inspector ____ his fingers over the sheet of newspaper. There were some marks on the surface of the paper.
①  turned
②  set
③  held
④  ran
【单选题】 ——May I put my luggage on the seat beside you, sir? ——____.
①  Sure,withpleasure
②  Okay,pleaseyourself
③  Well,nevermind
④  Yes,helpyourself
【单选题】 03. I promised to look_________ the matter as soon as I got there.
①  for
②  in
③  into
④  after