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用了树莓派一段时间之后，出于保护原因，我打算为它做一个机箱(盒子)，完成之后是这个样子：
After using Raspberry Pi for some time, I decided to make a case for it for protecting reason, and it's finished appearance looks like this: 

不美观，但是很实用(请忽视图中那个对比高度用的游戏币)。下面就是基本的制作过程。
Of course not beautiful, but very useful(please ignore the coin besides the case). Below is the basic process to build one:
文章来源：http://www.codelast.com/
【1】准备机箱材料 / Preparing case material
机箱用什么来做最好？金属太硬，不方便加工；厚纸板硬度不够，而且不透明，不好。亚克力板是个绝佳的选择：透明、方便加工、硬度够，而且超级便宜——事实已经证明，价格不到￥2的亚克力板，就可以做出一个树莓派机箱！
What is the best material for the case? Metal is too hard to process and paper board may not has enough hardness & it's not transparent, so the acrylic plate may be an excellent choice: transparent, easy to process, enough hardness, and super cheap - it has been proved that we can make a Pi case with an acrylic plate less than $0.4 !

下面是我买的亚克力板(上面粘了一层纸，撕掉即透明)，￥5 一块，尺寸 20cm * 30cm，厚约1.7mm，最后做好一个树莓派机箱用了不到半块。
Below is the acrylic plate I bought(a piece of paper was sticked there so it's not transparent), it's price is less than $1, size is 20cm * 30cm, thickness is about 1.7mm, at last I used less than half of it to make a case.

文章来源：http://www.codelast.com/
【2】准备工具 / Preparing tools
为了能尽快完成这项工作，我先从淘宝上购买了一堆有用的东西，例如电磨(一种打磨用的电动工具)，钻头，等等。当然，最好还能准备锉子，小型夹具等，如果条件不具备，那就凑合着开工吧！下面是我的装备——
To improve work efficiency, I bought some useful things from taobao.com(the largest e-commerce website in China), e.g. a electric grinder, some drills, etc. Below are my equipments -
电磨：
The electric grinder:

文章来源：http://www.codelast.com/
电磨用的钻头：
Drills used by the electric grinder:

文章来源：http://www.codelast.com/
电磨用的切割头：
The cutting head used by the electric grinder:

文章来源：http://www.codelast.com/
电磨用的打磨头：
Grinding heads used by the electric grinder:

文章来源：http://www.codelast.com/
用于固定钻头、切割头、打磨头的夹头：
Chucks used to fix all the drills & heads above:

文章来源：http://www.codelast.com/
装上了切割头的电磨：
The electric grinder with the cutting head equiped:

文章来源：http://www.codelast.com/
千万不要以为购买这些工具要花很多钱，事实上它们都是山寨货，精度较差，所以都很便宜。所有东西加起来也就大概￥100，非常适合技术宅们买来玩。
Never think that these tools will cost you a lot, actually because of they are all inferior quality products which have low precision, so all of them are cheap to buy. They cost me only about $20 and are very suitable for tech geeks.

【3】量体裁衣 / Cut out acrylic plate to fit Pi
由于我不懂如何对树莓派的三维尺寸进行计算机逆向工程，并且我也没有数控机床等精密加工设备，因此，我只能先把树莓派放在亚克力板上，用铅笔画个大概的尺寸出来——总共要切割6块不同大小的亚克板出来，不能把USB口、网口等尺寸限制得太小，因为纯手工加工的情况下无法做到精确加工，只能多留点余地出来。这里特别要提醒一下，我最后因为两块板的尺寸太小（USB接口和电源接口那两端的板），又重做了那两块，所以，为了防止尺寸不足导致最后重做，板子一定要做大一些，最后再锉掉都没关系。
I don't know how to get the three dimension of Pi by computer reverse engineering, and I don't have any precision processing equipment such as NC machine tools, so I can only use the most primitive method to do the work, that is, put Pi on the acrylic plate, draw some rough lines, and then cut it - totally need to cut 6 pieces of board with different size. You can't limit the USB port & network port to a very small size because you can't process the acrylic plate very precisely, so leaving some some is very important. I'm very regretful that I waste 2 pieces of finished boards because of short size.

在这里给大家一个长宽高的参考值：90mm * 60mm * 35mm，如果没有精密加工设备，建议普遍放大5~10mm。至于其他的每个接口的尺寸和位置，我就给不了你了，因为我也是跟着感觉走的...
Here is a reference value of the three dimension of Pi: 90mm * 60mm * 35mm. Add 5~10mm if you don't have precision processing equipments. And I can't give you any info of all the positions & sizes of the ports on Pi, because I was following my thinking to do that..
文章来源：http://www.codelast.com/
出于散热需要，最后一定要记得在顶盖上方钻一些孔！我是在上面钻了一个“Pi”出来。
具体的加工过程这里就不说了，无非就是噪音+粉尘(记得戴口罩)，当然还伴随着快乐。
For cooling reason you should drill some holes on the head cover board, I made a word "Pi" as youseen before.
The detailed process will not be described here because it's just along with noise & dust(remember to wear a mask), and of course, happiness.

【4】组装 / Assembling
我手工做的板子由于精度不够，无法直接嵌合在一起，所以我必须用四根橡皮筋把它们套在一起，也就是前面的图呈现的那个样子。
Because of lacking of enough precision, the self-made boards couldn't be jointed together without any outside help, so I used 4 rubber bands to fix them, as you seen before.