Pl s tell me HOw Sphere is manufactured?

Question

PLs tell me the actual process and how it is done. I am a mechanical engg Student

and also how nuts ,bolts and rivets r manufactured

Answer 1

Since you wrote that you are a student of engineering, you should be accessing library and books. OK.

A sphere is manufactured in several ways. By casting, by machining and if very big, like the Horton's sphere, by welding. Powder pressing also is employed.

You can look up the other processes too in any good book on manufacturing technology.