独り言集 令和三年十月版
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半田鏝 細先 瞬失   to English Note  [2021/10/06]

+++ 瞬間加熱式ではないけれど +++

近頃は、ちょっとした"半田付け"や、(例えば、ホットメルト・ボンドなどの)"加熱用"に、中華製の温度調節可能な半田鏝(60W)を頻繁に使うようになった。(図1 $4.19 ¥452送料・手数料込み)

温度設定を最高450℃にしておくと、鏝先が細い所為もあろうが、使用可能温度に達する時間が、大変短いので、気の短い私には、好都合なのだ。(図2[クリック]
だから、直ぐに、この半田鏝を使いたくなるわけ。

だが、その後が良くない。
続く別作業の為に、"高温度設定"のままで、暫く、放置してしまう。
気が付いたら、"最低温度"に戻すのだが、やはり、かなり時間が経った後になることが多い。

もしも、常時は最低温度で、"押し釦"で瞬間的に設定温度にまで上げる方式だと、鏝先の消耗も減って、もう少し使い易く良くなるかも。


+++ 高速高温度化は、鏝先を消耗させる +++

矢張り、高温度で長時間放置するのは、「鏝先」には良くないようだ。
「鏝先」の消耗が、大変激しい。
それこそ、あっと言う間(瞬間的!?)に、(ヤスリ掛けもしていないのに、)劣化・消耗で、先が短くなってしまった。(図4[クリック]

まぁ、半田鏝の先は、元々消耗品ではあるのだが、これは少々早過ぎる。
止む無く、鏝先群だけを注文していたのだが、多種交じっているものを買ってみた。(図3 12種入り $6.20 ¥711送料・手数料込み)
だけど、並べて見て、先の細過ぎるモノが5本も入っていた。
便利そうに見えるが、多分、これらの先端は、"瞬失"かな?

こうした「細い鏝先」は、局部加熱・溶融には良いのだが、半田全体の"溶融後の表面"が汚い。
半田全体が綺麗に融けるまで、じっと保持しているべきかもしれない。
でも、"細い先"だと、長く待っても、全体を融かせるかどうか、疑問。

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鉄錆落し 不完   to English Note  [2021/10/02]

+++ アンテナ支持金具の取り外し +++

先日、長い間残してあった「50MHz帯GPアンテナ」を下ろそうとした。
ところが、支持金具を留めてあるビス・ナット(5.5oφ)が、錆で固まっていて、どうしても取れなかった。(図2[クリック]

両側にレンチを噛ませて、捻じ切ってやろうかと思ったが、とても力が足りず。(苦笑)
あれこれやってみたが、駄目だった。
結局、ドリル(3oφ)でビスの頭に穴を開けて、更に(6oφで)それを広げて、ビスとナットを分離した。(図1

これが、ステンレス製だったら、多分ドリルの刃は立たないだろう。
因みに、ステンレス製ビス・ナットは、普通は錆びないから、こんな様にはならないはずだが、実は、長期間強い力を掛けておいたら、両方が固着してしまうという(厄介な)ことが起きて、困ったことがある。
その時は、アンテナの固定金具の細い箇所を金鋸で引き切ったが、ステンレス製だったのと、場所が(梯子の上の)中空だったので、作業は、容易ではなかった。(未だ、若かったから、出来たか? 苦笑)


+++ 魔法の「安全錆落し」は無い?! +++

YouTube動画」など拝見していると、ボンコツ機器の解体などで、錆びが覆っているナットにシュシュッと"薬液"を吹き付けて、簡単に外してしまうシーンをよく見掛ける。
そんな魔法のような"薬液"があるのか!?と、後で、DIY店を探した。
塗り付ける「スーパーサビノンSS」(¥932税込み)というのがあったので、買って試してみた。(図4[クリック]

確かに、表面の錆の量は減っている。しかし、完全に落とすには、到底2〜3時間では無理だし、幾度も、擦り落として塗り直す必要がありそうだ。(図3
短時間で錆落しをするには、やはり"強酸"でないと、無理なのではないか?
安全性の点では、どうだか知らんが。

それだったら、ドリルを使って、ビスの頭を削り落とす方が、速くて簡単だと思う。(まぁ、今回はその方式で外したのだが)


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[English Notes]
Instantly lost soldering iron slim tip   [2021/10/06]

+++ Although it is not an instant heating type, +++

Nowadays, I often use Chinese temperature controllable soldering irons (60W) for a little "soldering" or "heating" (such as hot melt bond). (Fig.1 $4.19 , \452 including shipping and handling)

Setting the temperature up to 450°C is convenient for me (who is short-tempered), because the time to reach the usable temperature is very short, although it may be because the soldering iron tip is thin. (Fig.2 [click])
That's why I immediately want to use this soldering iron.

However, it is not good after that.
For the next work, I left it for a while with the "high temperature setting".
When I notice it, I return it to the "minimum temperature", but again, often after a considerable amount of time.

If the temperature is always the lowest and the temperature is raised to the set temperature instantly with the "push button", the wear on the tip will be reduced and it may be a little easier to use.


+++ High speed and high temperature consumes the tip of the soldering iron +++

Yes, It seems that leaving it at a high temperature for a long time is not good for the "iron tip".
The consumption of the "soldering iron tip" is extremely severe.
In a blink of an eye (instantaneous), the tip became shorter due to deterioration and wear (even though I didn't file it). (Fig.4 [click])

Well, the tip of the soldering iron is originally a consumable item, but this is a little too early.
I had no choice but to order only the iron chips, but I bought a mixture of chips. (Fig.3 12 types included $6.20 , \711 including shipping and handling)
However, when I looked side by side, there were 5 too tapered/slim objects .
It looks convenient, but maybe these tips are "instant loss"?

Such a "thin tip" is good for local heating and melting, but the "surface after melting" of the entire solder is dirty/not smooth.
It may be necessary to hold it still until the entire solder melts cleanly.
However, with a "thin tip", I wonder if the whole thing will melt even if I wait for a long time.

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[English Notes]
Iron rust removal Incomplete [2021/10/02]

+++ Removal of antenna support bracket +++

The other day, I tried to take down the "50MHz band GP antenna" that I had left for a long time.
However, the screw and nut (5.5 mmφ) holding the support bracket was hardened by rust and could not be removed. (Fig.2 [click] )

I thought I'd bite a wrench on both sides and twist it, but I wasn't strong enough. (Bitter smile)
I tried this and that, but it didn't work.
After all, a hole was drilled in the head of the screw with a drill (3 mmφ), and it was further expanded with 6 mmφ to separate the screw and nut. ( Fig.1 )

If it were made of stainless steel, the drill bit would probably not stand.
By the way, stainless steel screws and nuts usually do not rust, so it should not be like this, but in fact, when I apply strong force for a long time, both will stick. I've been in trouble because both faten hard has happened.
At that time, I cut off the thin part of the antenna fixing bracket with a metal saw, but the work was not easy because it was made of stainless steel and the place was hollow (on the ladder). (I was still young, so I could do it. z(-.-;)


+++ Is there a magical "safety rust remover" ?! +++

When watching "YouTube video" etc., when dismantling a bonkotsu device, etc., it is easy to remove it by spraying scrunchie and some "chemical solution" on the nut covered with rust. I often see scenes.
Is there such a magical "chemical solution"?? Later, I searched for a DIY store.
There was a "Super Sabinon SS" (\932 including tax) to be smeared, so I bought it and tried it. (Fig.4 [click])

Indeed, the amount of rust on the surface is reduced. However, it is impossible to completely remove it in a few hours, and it seems that it will be necessary to scrape it off and reapply it many times. (Fig.3)
Isn't it impossible to remove rust in a short time without "strong acid"?
I don't know how it is in terms of safety.

If so, I think it's faster and easier to use a drill to scrape off the head of the screw. (Well, this time I removed it with that method)


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