Designing A Machine Part 设计机器部分
In the previous lesson you learnt how to create compound shapes by adding and subtracting primitive shapes in your CAD software. In this lesson you will go a step further and recreate an entire machine part at the correct scale using CAD. The first thing you will want to do is to refer back to your drawing of a “machine part“ that you completed in an earlier lesson. You will use this drawing as a guide as you recreate this machine part on the computer. In this project you will want to make sure that you use a number of tools such as the “scale“, “align“, and “join” tools which will help you to accurately recreate this drawing.
在上一节课中学习了如何通过在 CAD 软件中添加和除去原始形状来创建复合形状。在本课中，将更进一步使用 CAD 按照比例重新创建整个机器部分。首先回顾一下上节课中完成的”机器部分”的绘图，以此作为参考，通过使用多种工具，如”比例”、”对齐”和”合并”等，来重新设计绘图。
Step by Step Process 详细步骤
It is usually recommended to start by creating the largest parts first and then work your way downwards, completing the small finishing details last.
通常建议先创建最大的部分，然后再是小的部分。
Step 1
第 1 步
Insert a cylinder.
插入一个圆柱。
Step 2
第 2 步
Then resize the cylinder.
然后调整圆柱大小。
Step 3
第 3 步
Add a cube.
添加一个正方体。
Step 4
第 4 步
Then resize and align the cube to create the overall shape of the machine part.
然后调整正方体大小并调整，以创建机器部分的整体形状。
Step 5
第 5 步
Create a transparent cylinder. Resize the cylinder and place it in the centre of the object.
创建透明圆柱体。调整圆柱体大小，并将其放在物体的中心。
Step 6
第 6 步
Check the alignment of each object to make sure that each object is perfectly aligned.
检查确保每个对象完全对齐。
Step 7
第 7 步
Group the shapes together.
将形状组合在一起。
Step 8
第 7 步
Then create a transparent rectangular prism and place it accordingly.
然后创建一个透明的矩形棱镜，并相应地放置它。
Step 9
第 9 步
Check the alignment of each object to make sure that the rectangular prism intersect the main shape properly.
检查每个物体是否对齐，以确保矩形棱镜正确相交主体形状。
Step 10
第 10 步
Group the shapes together to complete the main bracket for this machine part.
将形状组合在一起，完成此机器部分的主支架。
Step 11
第 11 步
Create another cylinder.
创建另一个圆柱体。
Step 12
第 12 步
Then rotate the cylinder.
然后旋转圆柱体。
Step 13
第 13 步
Resize and then align the cylinder to centre of the main bracket, and make sure that the two objects touch.
调整大小，然后将圆柱体对齐到主支架的中心，并确保两个物体接触。
Step 14
第 14 步
The last step will be to add a “text” layer.
最后一步是添加”文本”层。
Step 15
第 15 步
Use this text layer to include your name on the front side of your machine part.
在文本层写上你的姓名并放在机器前面。
Step 16
第 16 步
Group all of the shapes together one more time to complete your machine part.
将所有形状再组合一次，完成机器部分。
Review & Check
审核和检查
Check your project, and make sure that everything is properly aligned.
最终检查，并确保一切准确对齐。