【单选题】如图所示零件,底面3和侧面4已加工好,现需加工台阶面1和顶面2,定位方案见图b,c。图b的基准位移误差为:
【简答题】基准判定、基准不重合误差分析与计算 附图中的工件,本工序以A面定位加工F面,计算δB分析: (1)分析该工序加工过程中的工序基准和定位基准之间地联系尺寸,并按照基准不重合误差分别找出该工序的工序基准、定位基准。 (2)画出该工序的工艺尺寸链,分析工艺尺寸链的组成环节,并分别按照尺寸链的字组成因素判定增环、减环及封闭环。 (3)计算联系尺寸及其偏差。 (4)根据误差不等式(假定基准位移误差δB=0)...
【单选题】What is the cause of the strike?
C.
The rising fuel prices.
D.
Environmental pollution.
【简答题】Lynn was a young French Canadian girl who grew up in the farming community. At the age of l6, her father thought that she had enough schooling and forced her to drop out of school to contribute to the...
【单选题】如图所示零件,底面3和侧面4已加工好,现需加工台阶面1和顶面2,定位方案见图b,c。图c的基准位移误差为:
【单选题】以下各项中,不属于组织设计的基本原则的是( )
【单选题】如图垫圈零件以内孔在定位销上定位,钻φ 1 mm孔,被加工孔的位置尺寸L 1 ±0.01mm的定位误差中基准位移误差是:
【简答题】如图所示, 此时基准位移误差 [填空(1)] 。 prefix="v" ns="urn:schemas-microsoft-com:vml" prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace> prefix="w" ns="urn:schemas-microsoft-com:office:word" ?xm...
【单选题】查看材料
A.
He needs to buy a new sweater.
B.
He has got to save on fuel bills.
C.
The fuel price has skyrocketed.
D.
The heating system doesn't work.