Introduction to a new CNC ball-spinning machine

Ball spinning, a special process to manufacture wall-thinned tubes with small diameter, has been used widely in recent years, although it was invented decades years ago. Many researchers are trying to develop various equipment to meet their requirements, such as to produce conical wall tubes, stepped wall tubes, etc., but the machine introduced in this article is very different from the setups mentioned above. The rolling balls in this machine can be forced to move in the radical directions to shape tubes according to CNC programs. In this paper, the working system, the special working female die and other characteristics of the CNC ball-spinning machine are introduced in detail.