Method for regenerating diaphragm petals

Abstract

The method comprises the following phases: supply of one petal to be regenerated ( 1 ) comprising: one hole ( 2 ) defining an axis of rotation (R 1 ) around which the petal to be regenerated ( 1 ) is movable between an opening position, wherein it defines a passage opening, and a closure position; a first worn surface ( 5 ) defining part of the passage opening; a second worn surface ( 6 ) contiguous to the first worn surface ( 5 ); one worn vertex ( 7 ) located between the first worn surface ( 5 ) and the second worn surface ( 6 ); grinding of the first worn surface ( 5 ) and of the second worn surface ( 6 ) to obtain a first ground surface ( 8 ), a second ground surface ( 9 ) and a new vertex ( 10 ), wherein the spacing between the new vertex ( 10 ) and the axis of rotation (R 1 ) is less than an original reference value; definition of a new hole ( 11 ) defining a new axis of rotation (R 2 ) wherein the spacing between the new vertex ( 10 ) and the new axis of rotation (R 2 ) corresponds to the original reference value.

1 . Method for regenerating diaphragm petals, wherein it comprises at least the following phases:
 supply of at least one petal to be regenerated, wherein said petal to be regenerated comprises:
 at least one hole associable with a frame (T) of a diaphragm (D) and defining an axis of rotation (R 1 ) around which, in use, said petal to be regenerated is movable between an opening position, wherein it partly defines a passage opening of said diaphragm, and a closure position, wherein it partly occludes said passage opening; 
 at least a first worn surface defining, in use, at least part of said passage opening; 
 at least a second worn surface, contiguous to said first worn surface and, in use, associated with the first surface of an adjacent petal in a sliding manner; 
 at least one worn vertex located between said first worn surface and said second worn surface; 
   grinding of said first worn surface and of said second worn surface to obtain a first ground surface, a second ground surface and a new vertex located between them, wherein the spacing between said new vertex and said axis of rotation (R 1 ) is less than an original reference value;   definition of a new hole defining a new axis of rotation (R 2 ) wherein the spacing between said new vertex and said new axis of rotation (R 2 ) corresponds to said original reference value.   
     
     
         2 . Method according to  claim 1 , wherein said petal to be regenerated comprises a bushing defining said hole, said phase of definition comprises the following steps:
 removal of said bushing from said petal to be regenerated;   supply of a blank bushing;   drilling of said blank bushing to obtain a new bushing defining said new hole.   
     
     
         3 . Method according to  claim 1 , wherein said phase of definition comprises a step of application of said blank bushing to said petal to be regenerated, said drilling step being carried out subsequently to said application step. 
     
     
         4 . Method according to  claim 1 , wherein prior to said phase of grinding, it comprises a phase of positioning said petal to be regenerated with respect to a predefined position wherein it is positioned with said spacing substantially parallel to a substantially horizontal Cartesian axis (X). 
     
     
         5 . Method according to  claim 1 , wherein it comprises a phase of retaining said petal to be regenerated in said predefined position. 
     
     
         6 . Method according to  claim 1 , wherein said petal to be regenerated comprises at least one pivot defined at an intermediate position between said hole and said new vertex and adapted to operate in conjunction with actuation means for actuating said diaphragm (D) and by the fact that said phase of retaining is performed where said pivot is located. 
     
     
         7 . Method according to  claim 1 , wherein said phase of retaining comprises:
 at least a first step of blocking said petal to be regenerated against shifts along the three Cartesian axes;   at least a second step of blocking said petal to be regenerated against a rotation around an axis passing through said pivot.   
     
     
         8 . Method according to  claim 1 , wherein said phase of grinding is performed by moving at least one milling tool along a predefined path, said predefined path being shifted along said Cartesian axis (X) by a grinding value from an original path. 
     
     
         9 . Method according to  claim 1 , wherein said phase of definition is performed along a drilling axis, said drilling axis being shifted along said Cartesian axis (X) by said grinding value with respect to an original drilling axis. 
     
     
         10 . Method according to  claim 1 , wherein said phase of grinding and said phase of definition are performed on board the same machine.