Punching and nibbling machine fitted with a device for an automatic quick tool change.

摘要

The object of the present invention is a punching and nibbling machine provided with a device for automatically changing a pair of tools, of which one is a stationary die (7), and the other is a movable punch (8), which when set in working position, are both coupled with the respective die or punch holding unit (3, 4) on the common, vertical operative axis (Y) of the punching and nibbling machine, characterized in that this tool changing device comprises two main magazines (5, 6), respectively for a set of dies (7), and for a matching set of punches (8). The said magazines (5, 6) are each provided with conveyor means (9, 10; 11, 12) for carrying the tools (7, 8) and for bringing the selected pair of tools (7, 8) into working position, in which their axis (X) is caused to coincide with the operative axis (Y) of the machine. The said conveyor means (9, 10; 11, 12) are so provided that the tools (7, 8) are moved along a closed path, with their axes being substantially held in a plane passing through the operative axis (Y) of the punching and nibbling machine, and preferably lying across the machine main frame. The said conveyor means (9, 10; 11, 12) are so designed that the tools (7, 8) are not upturned while they are being conveyed, so that no means are necessary for clamping each tool to the respective cartridge (14), and a remarkably simplified construction of the magazines is thus attained.