Automatic bar feeding and discharging method

The invention discloses an automatic bar feeding and discharging method which comprises the following steps that (1) m layers and n + 1 columns of material frames are formed in a material box frame, an AGV carries a material box to move to a first cutting chamber, and (2) a linear module I and a linear module II are driven to feed forwards; (3) the leftmost material frame falls to the mth layer of the material box, the rightmost material frame of the first layer slides on the sliding rail, and the rightmost material frame is lifted by one layer through a lifting device II; (4) the AGV carries the material box to move to the next cutting chamber; 5) repeating the steps 2-4; until no material frame is arranged on the lifting device II; (7) the steps (2) to (6) are repeated until all the materials in the material frames in the material box are loaded, the unloading process is similar to loading, automatic loading and unloading of the bar materials are achieved, the automatic loading and unloading device is more