Doesn't look like done on purpose to me. If you need a bend in the rod to allow its movement, it's not important where you put it, as long as you keep it to a minimum.
BTW, in English (and German) there are two different words used, depending if there is a metal of lower melting point used, quasi as a "glue" for the 'saldatura'. In that case we speak of soldering / löten. If the metal of the parts joined is melted, the term is welding / schweissen.