”变成“ vs “变成为” 有什么不同？ 我不清楚 ”为“ 对 像 ”变成“ ”改造“ 这样的词的影响是什么。比方说，“变成为”，“改造为” 跟 “变成” “改造“ 有什么不同的地方。如果一个词是改变的意思，总是可以加 “为” 吗？

I am not sure what the impact of "为" is on verbs that indicate change. For instance, "变成“ vs "变成为“ or "改造" vs. "改造为". In addition, I am not sure whether "为" can be added to all verbs that indicate change or just a few specific ones.
"变成为" is kind of redundant. It is the same as "变成".

Here the "stem" of verb is "变", while "成" and "为" are two "suffixes" that have similar meaning.

"改造" and "改造为" are totally different. "改造" means to change something. "改造为" means to change into (become) something.