Soldering with solder supply - how to fix the lead parts?

Question

Electronics

Hello!
He began to master a new method of soldering - with the supply of solder to the place of soldering (i.e. solder not on a soldering iron).
There was a problem - how to fix the output parts before soldering on the board?
This is not difficult with the usual old-fashioned method - one hand is free. And here in one hand a thread of solder, in the other a soldering iron.
I soldered 8 LEDs in a row on the board - I was exhausted and the result was so-so.
So far, apart from masking tape, nothing has come to mind.
But perhaps there is some kind of Orthodox way?

Answer 1

For bipedal attachments (eg resistors) there are three mounting methods .
1. The legs are bent at 90° along the distance between the holes, and the resistor lies on the board. For this method, it is enough just to turn the board over, pressing the resistor to the work surface with it, and calmly solder from above. But you can do this even "on weight" - only on the finger, which will be pressed against the body of the resistor, you need to attach something heat-resistant so as not to get burned.
2. The resistor is mounted vertically (one leg is soldered at the base and the other leg is bent 180°). The soldering technique is similar to the first method. Pressing in this way is easier even on a board partially soldered with large parts, but this mounting option is not very suitable in the case of a compact flat layout and requires acc. board wiring. Now this option is rarely used.
3. (Kosher) The legs are arched like the arms of a capital X so that the distance at the narrowest point corresponds to the distance between the holes. Then it can be snapped into the board (approximately as shown in the picture, only if it is pressed harder before soldering), and the case will hang above the surface. In this way, you can solder in general in any position of the board.
You also need to remember that, no matter which method is chosen, the manual assembly of the board is done in "layers": the first are the flattest parts, the last are the highest. Then pressing all the details in one layer is not a problem. Exceptions to this rule are made only for parts that are especially sensitive to the temperature conditions of soldering.
Now about the equipment.
There are special bars for crimping legs to standard sizes.
For clamping parts for soldering in small-scale manual production, in addition to the already mentioned "third hand", there are special frames.
or even
PS In general, pampering is everything ... in principle, it is enough to have two (not left) hands, a normal flux / solder / soldering iron, and in general it is high time to switch to SMD and soldering with a hairdryer or in an oven along the profile.

Answer 2

there are standard crocodile clips for soldering, probably in any soldering shop, they can usually hold both parts and both hands are free.
to be honest, I never even knew what they are called scientifically.