Manufacturing fluted waveguides from circular tubes - using die blocks with tapered channel changing from circular to elliptic cross-section

摘要

The system is for manufacturing fluted waveguides. A fluted metal tube is fed through dies made from two separate press blocks with semi circular channels. The cylindrical channel formed when the blocks are closed taper from the input end to the output end so that the metal tube will be compressed in a cone shaped cavity. The tube is moved along a given length when the blocks are separated. They are then closed again to shape a fresh section of tubing. The cross section at the inlet is circular but at the outlet, elliptical. Hence the tube is gradually changed from a circular to an elliptical cross section as it trravels through the disc.