Machine tool part loading and unloading method and device, particularly for machining printed circuit boards

摘要

On a drilling machine for drilling packs (23) of printed circuit boards (24), the packs (23) are loaded and unloaded between a support (47) and the work table (14) by engaging a pin (32) on the pack (23) via a pair of jaws (75) and by moving the table (14) longitudinally. The pack (23) is retained by a bar (89) for enabling two bars (108, 110) to engage and locate a further pin (33) on the pack (23); further retaining elements (132, 138, 139) provide for sliding the pack (23) in relation to the table (14); and a member (125) is activated for aligning the pack (23) against a fixed locator (123). The support (47) forms part of a rack (36) operated vertically in steps by a lifter (37) located behind the drilling machine.