Pneumatic control system for quick clamping of cornice brake tools

Abstract

The quick tool clamping system relates to a cornice brake in which there are rows of punches and dies and modular units consisting of intermediates and clamping jaws for the intermediates and jaws for clamping punches, with the latter being operated by actuators driven by pneumatic cylinders, and is characterized in that: a) in the intermediates and the jaws clamping the intermediates to the cursor of the press there are channels for feeding of the fluid under pressure to the actuator cylinder; b) said channels lead to at least one hole opening onto the opposing surfaces of each pair of intermediates and associated clamping jaw; and c) on at least one of the two opposing surfaces of each pair of intermediates and associated clamping jaw the associated hole opens onto a groove running horizontally in the surface and positioned at the same level as the hole opening onto the opposing surface, and in the circuit for supplying the fluid under pressure to every intermediate a valve is inserted designed to intercept the flow of fluid towards the intermediate. In accordance with a variation the groove running horizontally is missing and the holes opening onto the opposing surfaces of each pair of intermediates and associated clamping jaw are mutually opposed.

1 . Pneumatic control system for quick clamping of tools in a cornice brake in which there are rows of punches and dies and modular units consisting of intermediates, jaws for clamping the intermediates and jaws for clamping punches, with the latter being operated by actuators driven by pneumatic cylinders, characterized in that: 
 a) in the intermediates and the jaws clamping the intermediates to the cursor of the press there are channels for feeding of the fluid under pressure to the actuator cylinder;    b) said channels lead to at least one hole opening onto the opposing surfaces of each pair of intermediates and associated clamping jaw;    c) on at least one of the two opposing surfaces of each pair of intermediates and associated clamping jaw the associated hole opens onto a groove running horizontally in the surface and positioned at the same level as the hole opening onto the opposing surface; and    d) in the circuit for supplying the fluid under pressure to every intermediate a valve is inserted designed to intercept the flow of fluid towards the intermediate.    
     
     
         2 . Pneumatic control system for quick clamping of tools in a cornice brake in which there are rows of punches and dies and modular units consisting of intermediates, jaws for clamping the intermediates and jaws for clamping punches, with the latter being operated by actuators driven by pneumatic cylinders, characterized in that: 
 a) in the intermediates and the jaws clamping the intermediates to the cursor of the press there are channels for feeding of the fluid under pressure to the actuator cylinder;    b) said channels lead to two holes mutually opposed opening onto the opposing surfaces of each pair of intermediates and associated clamping jaw; and    c) in the supply circuit for fluid under pressure toward each intermediate is inserted a valve designed to intercept the flow of fluid towards the intermediate.    
     
     
         3 . System in accordance with  claim 1  characterized in that the above mentioned groove running horizontally is surrounded by a second groove in which a seal of elastic material is seated, designed to ensure seal of the fluid under pressure when the intermediate and associated clamping jaw are clamped together.  
     
     
         4 . System in accordance with  claim 1  or  2  characterized in that the above mentioned valve is manually operated.  
     
     
         5 . System in accordance with  claim 1  or  2  characterized in that the above mentioned valve is operated automatically and is put in closing or opening condition when the jaw in which it is located is clamped to or respectively is shifted from the associated intermediate.  
     
     
         6 . System in accordance with  claim 5  characterized in that in each intermediate clamping jaw there is a projection on the surface designed to close against the intermediate, designed to be inserted upon clamping in a corresponding recess on the opposing surface of the intermediate so as to prevent opening of the above mentioned valve when the jaw is clamped against tools not having the above mentioned recess.