Thread repair. This is going to be fun, mostly because you can see the results so clearly.
That is not round at all!
Tapping at a dentball to make the threads round again, but very carefully so it's not flared out.
Look at the black areas around the dentball, and where the ball is contacting the surrounding threads, that tells me where it's out of round.
Casing repair. Greg may have used his steel hammer on that casing to make a pretty dent for me, the piston can't even go in all the way because the dent is so big!
The trumpet I had to fix the casing dent in.
Can you see that ginormous dent? It's right in the middle of the picture.
That's how small the dent looks from a bit of a distance, my left ring finger is pointing at it.
Can you see the dent inside of the casing now? Look inside and there is a small spot, that looks like a penny. This tiny little thing will stop the piston from going all the way down.
After putting it on a mandrel and tapping it looks better. I ended up getting it out completely and worked on alignment of the whole trumpet to get the second piston to feel nice too.
Those are going to be thread cap pliers. Basically it's a bottom cap of a yamaha trumpet (those pliers will only be used for fixing threads on bottom caps on yamaha trumpets) that I'm going to silver solder to pliers. After that I'll cut through the cap so each half will be attached to one "leg" of the pliers. Then I just need to put the cap around bad threads, squeeze with my pliers and twist.
Going to solder my pliers to the bottom cap. This didn't go well because the cap still had plating on it (oops), so I will have to do that at a later time. It wasn't a class project and isn't graded so this tool is not a priority.
No comments:
Post a Comment