【答案为下面试题答案,请核对试题后再购买】otiku.net 欧题库 收集整理
机械制图”作业2 (本部分作业覆盖教材第3章的内容,要求第11周以前完成)。 1. 已知切割体的两个投影,求作第三个投影。(20分) (1)
![](https://otiku.net/wp-content/uploads/2022/05/1572348196-1-1-1.png)
(2)
![](https://otiku.net/wp-content/uploads/2022/05/1572348198-1-2-1.png)
(3)
![](https://otiku.net/wp-content/uploads/2022/05/1572348199-1-3-1.png)
(4)
![](https://otiku.net/wp-content/uploads/2022/05/1572348199-1-4-1.png)
2.已知切割曲面立体的两个投影,求作第三个投影。(不可见线画虚线)。(20分) (1)
![](https://otiku.net/wp-content/uploads/2022/05/1572348199-2-1-1.png)
(2)
![](https://otiku.net/wp-content/uploads/2022/05/1572348199-2-2-1.png)
3.已知相贯体的两个投影,用近似画法求作第三个投影。(不可见线画虚线)。(20分) (1)
![](https://otiku.net/wp-content/uploads/2022/05/1572348199-3-1-1.png)
(2)
![](https://otiku.net/wp-content/uploads/2022/05/1572348200-3-2-1.png)
4.补全复杂组合体投影图上所缺的图线。(20分) (1)
![](https://otiku.net/wp-content/uploads/2022/05/1572348200-4-1-1.png)
(2)
![](https://otiku.net/wp-content/uploads/2022/05/1572348200-4-2-1.png)
(3)
![](https://otiku.net/wp-content/uploads/2022/05/1572348200-4-3-1.png)
5. 根据两投影求第三投影。(20分) (1)
![](https://otiku.net/wp-content/uploads/2022/05/1572348200-5-1-1.png)
(2)
![](https://otiku.net/wp-content/uploads/2022/05/1572348201-5-2-1.png)