A bonding apparatus and method of metal plates simplifies a bonding process and improves bonding strength of metal plates. The planet spindle is mounted such that it can itself rotate about its axis relative to the planet carrier. The graph database further stores a set of relationships, with each relationship defining an edge between two related objects. The at least one set of dividers have bottom ends that are mounted to the tiered shelf structure of the bottom shelf and top ends that mate with the set of guides on the bottom of the at least one intermediate shelf.