Bar guide device for bar feeders in machine tools

摘要

The present invention relates to a bar guide device for bar feeders in machine tools. The device has a plurality of guiding units (101) which are longitudinally aligned. Each guiding unit has a pair of sprockets (102,103) which are rotatable and have polygonal peripheral grooves (107,108). The grooves are constituted by semicylindrical recesses (107a-107e; 108a-108e) which have different diameters and form, in the mutually opposite position, a guiding channel for a bar (20) to be fed toward the machine tool.