Design, Development and Analysis of Four Roller Spinning Head for Spinning Machine

Tube spinning is an excellent process to produce seamless thin walled tubular work pieces in the diameter range from a few millimetres to several meters. During tube spinning, the rollers advance spirally over the tube blank resting on a rotating mandrel and apply compressive force to the surface of tube blank, causing the metal to flow axially through reducing wall thickness. In spinning process performed in spinning machine unbalanced load imposed on the mandrel aggravated the circular run-out and eccentricity of the mandrel, thus influencing the forming process of tube spinning and decreasing the forming precision of as spun tubular work pieces, such as wall thickness uniformity and circularity of as spun tubular work pieces. The problem is solved by increasing the number of roller in the spinning machine from 3 rollers to 4 rollers. Increase in number of rollers will lead to the balancing of mandrel between 4 rollers. Distribution mode analysis made for both three and four roller spinning machine.