Desoldering a wedding ring is a quick process that can take up to a day. The jeweler uses a small saw and cuts the rings. It will not damage the ring in any way and the jeweler will polish it so that it remains as beautiful and shiny as the day it was purchased. It's a fairly simple process that usually doesn't take much time.
Ring welding does not damage the rings in any way. It doesn't hurt, but it can remove some metal in the process. I had my electronic ring unsoldered (it's a solitaire with an enhancer). You can't even tell that they were welded at any given time.
The most important factor to consider when welding wedding rings is that once they are attached, they don't come apart easily. In the long run, you may decide that you no longer want your rings to be soldered together. Or maybe you plan to pass on the rings from generation to generation. In both situations, separating welded rings is a difficult possibility and may even damage the rings.
Do solder rings lower their value? Fortunately, this is not the case because the rings themselves are not altered. However, separating them can cause damage and, in turn, reduce the value. When you solder your wedding rings, you no longer have the option of wearing just your wedding band or engagement ring. I love the look of a wedding ring (or wedding rings stacked on one side), so I would leave one soldered.
Many brides choose to weld their wedding rings as a way to join their two beloved wedding rings together.