问题 问答题 简答题

如何判断冲模的技术状态是否完好?

答案

参考答案:

(一)落料、修边、冲孔模。制件外观要符合技术要示,不允许存在过大的圆角、毛剌,少孔及二层亮带定位齐全,可靠无磨损刃口锋利,表面无磨损;退料板和顶出器、活动灵活可靠;导柱、衬套在工作中无声响,润滑良好;各紧固部分无松动,紧固件要齐全;废料排除要安全,畅通;厚板落料冲孔时声响正常。

(二)拉延、成形、压弯模制件表面无拉伤、划痕、皱纹、开裂、回弹及变形等缺陷;工作部分平稳、光滑、无磨损、特别是圆角更应注意其光滑程度及有无棱线;定位齐全可靠,无磨损;压料板、顶出器,活动灵活可靠;导柱衬套在工作中无声响,润滑良好;各紧固部分无松动,紧固件齐全;送毛坯或半成品及取出制件要方便。

完形填空
完形填空。
     One day the famous (著名的) scientist Albert Einstein   1   an old friend of his in the street in New York. "Mr. Edelstein," said   2   friend, "You need to   3   a new coat. Look,   4   worn out (破旧的) it is!"
     "It doesn't matter." answered Einstein. "Nobody   5   me here in.New York."
     Several years   6  , they met in New York   7  , Einstein had become a world-physicist (物理学家) by then, but he was still wearing the   8   old coat.   9   more his friend tried to persuade (劝说) him to buy a new one.
     "There's no need, now," said Einstein. "I  10  here for a long time. Everybody here knows me."
( )1. A. found           
( )2. A. a              
( )3. A. have            
( )4. A. what           
( )5. A. has never known
( )6. A. after          
( )7. A. after          
( )8. A. before         
( )9. A. One            
( )10. A. have arrived  
B. bad            
B. an             
B. put on         
B. how             
B. has ever known  
B. later           
B. also          
B. same            
B. Once           
B. have got     
C. met         
C. the           
C. in          
C. however       
C. knows         
C. ago              
C. second    
C. enough       
C. Again         
C. have lived
D. knew        
D. /              
D. be          
D. why           
D. know          
D. since            
D. once      
D. usual        
D. Many times               
D. lived     
填空题