问题 问答题 简答题

数控加工工艺处理有哪些内容?

答案

参考答案:

1)选择并确定进行数控加工的零件及内容。

2)对被加工零件的图样进行工艺分析,明确加工内容和技术要求,在此基础上确定零件的加工方案、划分和安排加工工序。

3)设计数控加工工序。如工步的划分,零件的定位,夹具与刀具的选择,切削用量的确定等。

4)选择对刀点、换刀点的位置,确定加工路线,考虑刀具的补偿。

5)分配数控加工中的容差。

6)数控加工工艺技术零件的定型与归档。

阅读理解

One morning, Charley, a little green frog, was sitting in a pond by the side of the road.

Wanda, the neighborhood witch(女巫), was walking along the road. She was a good witch and dreamt to become a fairy godmother who can save people from trouble with magic powers. Wanda had been learning fairy godmother magic for 103 years. That morning, she decided to try the magic she had learned and bring happiness to others.

Seeing Wanda, Charley cried, “Hi, Wanda.”

“Hi, Charley,” replied Wanda, “I have a surprise for you.”

Then, Wanda waved her wand(魔杖), said a magic word, and Charley turned into a prince!

When Charley-turned-prince looked at himself in the water, he cried, “Hey! You turned me into a prince! It’s a surprise all right, but I don’t want to be a prince! Change me back right now!”

“Oh, dear,” Wanda said. “You shouted so loud that I forgot the way to change you back. But who wouldn’t rather be a prince?”

“I wouldn’t!” cried Charley. “I want to be a frog!” He stuck out his tongue, missing a bug (虫子)flying by the end of his nose. “Look at that, Wanda! I was a good fly catcher. But now, this tongue is too short! Please change me back!”

“I can’t, Charley. But you’ll learn to be happy as a prince.” She waved her wand, and suddenly a castle appeared. Out of the castle dozens of musicians were playing various instruments. “Charley! You’ll have servants, eat delicious foods, and you can sing and dance and snap fingers(弹响指).”

“No!” Charley interrupted, “I don’t want all these! I want bugs!” Charley cried. “I don’t want to sing and dance! And why would I do something as silly as snapping my fingers?”

“Snapping fingers!” cried out Wanda. “That’s what I forgot!” She snapped her fingers, cried “Upsi-doodle!” and the castle and musicians disappeared and the prince became a little green frog.”

Charley looked at himself in the water. “ You did it, Wanda. Oh, happy day! I’m a frog.”

“I must apologize, Charley,” Wanda said, “You are a happy frog. I should know this a moment ago.”

小题1:Wanda turned Charley from a frog into a prince          .

A.of her own will

B.to play a joke on him

C.at the request of charley

D.to teach Charley a lesson小题2:After the little green frog became a prince, he        .         .

A.was grateful to Wanda

B.wanted a great palace

C.couldn’t recognize Wanda

D.became angry with Wanda小题3:At the end of the story, Wanda probably felt        .       .

A.satisfied

B.ashamed

C.worried

D.excited小题4:According to the passage, which of the following conclusions can we get?

A.Just be yourself

B.Do nothing by halves

C.Helping others is a virtue

D.Where there is a will, there is a way

填空题