If you send him to the corner you are telling him to go there. I can picture my mother saying in a very stern voice "GO TO THE CORNER", with her arm outstretch and her finger pointing to the darkest and loneliest corner in the house. I quietly go, with my head down and with tears in my eyes. :(
If you put him in the corner, it means you grabbed him and pulled him there. You put him in the corner the same way you would put bread on a shelf. You may have to say "STAY IN THIS CORNER" so that he doesn't move from the place that you put him.
SEND = is an command that you are giving him.
PUT = is a physical action that you do (you don't even need to say anything).