用rivet tool修理護臉麵罩
原來修理過的護臉麵罩又壞了。就用rtvet tool修了一下。
1. rivet tool和rivets:
https://en.wikipedia.org/wiki/Rivet_gun
Pop-rivet gun
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A pop rivet gun is made to apply pop rivets to a workpiece, and was invented in 1916 by Hamilton Wylie.[2] This type of rivet gun is unique in its operation, because it does not hammer the rivet into place. Rather, a pop rivet gun will form a rivet in-place.
The gun is fed over the rivet's mandrel (a shaft protruding from the rivet head) and the rivet tail is inserted into the workpiece. When the gun is actuated (typically by squeezing the handle), a ball on the rivet's tail is drawn towards the head, compressing a metal sleeve between the ball and the head. This forms another "head" on the opposing side to the workpiece, drawing the work together and holding it securely in place. The mandrel has a weak point that breaks, or "pops" when the riveting process is complete. This style of rivet does not require the use of a bucking bar, because the force applied is away from the work. https://en.wikipedia.org/wiki/Rivet_gun
2. 修好的護臉麵罩（灰塑料上的藍塑料）：
3. 當時藍片底下裂了，決定鑽眼，用rivet釘上：
4. 鑽眼：
5. rivet隻有一麵有墊圈，
6. rivet的另一麵如果沒有一個墊圈，這樣rivet被擠壓成形後會把塑料擠壓到rivet原來的墊圈上，因而失去rivet的作用。因此塑料的另一麵因為沒有金屬墊圈就需要再做一個墊圈。要做墊圈，就先剪斷一個接線頭：
7. 把圓孔擴大，然後放到台虎鉗上：
8. 把尖的部分銼圓：
9. 這樣將來不會傷手：
10. 把rivet放進去：
11，從側麵看:
12.再放上墊圈：
13. 把rivet 插進rivet tool裏：
14. 拉緊rivet tool的兩個把手，rivet tool最後就把rivet拉緊並切斷：
15. 把斷了的rivet從rivet tool 取出：
16. 完工：
