I like things that make life simpler and easier. This device will help the welder and save him from unnecessary actions. We will talk about how to make a magnetic ground contact for a welder from an ordinary unnecessary speaker. I'll tell you more...
Typically, a clamp is used to attach a common ground wire to the metals being welded. Such a connection does not always provide a tight and reliable contact, and there are times when it is not entirely convenient. With the help of a magnetic contact, you can obtain a strong and reliable connection with a large cross-section in one movement, meaning a good contact area.
Will need
- The dynamic head is naturally non-working.
- Hairpin.
- Cheburashka nut.
- Washers.
Manufacturing of magnetic contact of welding cable
We disassemble the speaker, or rather, disconnect the magnet. To do this, you need to knock down the rivets. To do this, you can clamp the dynamic head in a lathe and bore it. Or just drill it out with a regular drill. In general, it's not difficult.
And the magnet comes off without any problems.
In my case, the core came off almost on its own.
If that doesn’t work for you, then heat it with a gas burner and pry it out with a screwdriver.
We take a piece of a hairpin 8-10 cm long and try it on the core. It will be attached like this.
We drill from the back side. The hole is not through, but approximately 80% of the total length.
We clamp it in a vice and cut a thread for the stud.
We put two nuts on the stud and tighten them together.
And now we screw this improvised bolt into the core to the maximum, you won’t have to turn it out anymore.
Now we tighten the nuts.
In order not to place the wire directly on the base, we first put on a small bushing and then a washer. Next is the welding wire.
We fix it on top with a washer and a wing nut.
Note the large contact area included.
Now let's put the magnet together.
For proper retention, you can put everything on glue or epoxy resin.
The magnetic contact is ready. Let's try welding. Place it on the sheet.
The clamping force is very good.
Welding proceeds without unnecessary red tape. No sparks fly from under the clamping area, everything is fixed perfectly.
