Punch press utilizing workpiece guidance system to effect tool changing

Abstract From the Canadian patent

A punching machine having a workpiece guidance system and a numeric control therefor, has one or more tool holders mounted upon the transverse rail of the guidance system and a, tool mounting assembly for receiving the punch and the die from the tool holder and securing them into position for punching of sheet metal and like workpieces. The workpiece guidance system effects the motion of the tool holder forwardly to bring the tools into the tool mounting positions and the tools are then clamped in position. The guidance system is then moved rearwardly with the empty tool. holder to a position where the punching operation can be conducted. Generally the work table and the workpiece are moved …