Fracture surface treatment method and fracture surface treatment apparatus of a ductile metal part, and manufacturing method and manufacturing apparatus of a ductile metal part being fractured and having its fracture surfaces treated

Abstract

A fracture surface treatment method of a fractured ductile metal part for treating fracture surfaces 51 a and 52 a of the ductile metal part 50 , said fracture surfaces 51 a and 52 a being fracture surfaces obtained by a fracturing operation of fitting halved mandrel portions into a penetrative bore of the ductile metal part having the penetrative bore and driving a wedge in between the halved mandrel portions, said fracture surface treatment method holding said fractured ductile metal part 50 in a state where said fracture surfaces 51 a and 52 a are separated from each other so as to keep a certain space between them, applying a specified vibration to at least one of said fractured ductile metal part portions in a direction intersecting the direction of fracture and removing fracture powder 59 stuck on said fracture surfaces 51 a and 52 a , and thereby enabling the optimum face fitting operation in case of fitting again the fracture surfaces of the fractured ductile metal part to each other.

1 . A fracture surface treatment method of a fractured ductile metal part for treating fracture surfaces of the ductile metal part, said fracture surfaces being obtained by a fracturing operation of fitting halved mandrel portions into a penetrative bore of the ductile metal part and driving a wedge in between the halved mandrel portions, comprising the steps of;
 holding said fractured ductile metal part portions in a state where said fracture surfaces are separated from each other so as to keep a certain space between them,   applying a specified vibration to at least one of said fractured ductile metal part portions in a direction intersecting the direction of fracture, and thereby   removing fracture powder stuck on said fracture surfaces   further comprising the step of pressing the fracture surfaces of said fractured ductile metal part against each other with a sufficient pressing force for well fitting them to each other facing a strain produced in said fracture part in addition to applying vibration to said fractured ductile metal part portions in a state where they are apart from each other.   
   
   
       2 . A fracture surface treatment method of a fractured ductile metal part according to  claim 1 , further comprising the step of repeating an operation of applying said vibration and an operation of pressing the fracture surfaces of said fractured ductile metal part against each other alternately at a specified number of times. 
   
   
       3 . A fracture surface treatment apparatus of a fractured ductile metal part for treating fracture surfaces of the ductile metal part, said fracture surfaces being obtained by a fracturing operation of fitting halved mandrel portions into a penetrative bore of the ductile metal part and driving a wedge in between the halved mandrel portions, comprising;
 a holding means for holding said fractured ductile metal part portions in a state where said fracture surfaces are separated from each other so as to keep a certain space between them, and   a vibration applying means for applying a specified vibration to at least one of the said fractured ductile metal part portions in a direction intersecting the direction of fracture and thereby removing fracture powder stuck on said fracture surfaces,   said fracture surface treatment apparatus further comprising a face fitting means for pressing the fracture surfaces of said fractured ductile metal part against each other with a sufficient pressing force for well fitting them to each other facing a strain produced in said fracture part in addition to said vibration applying means for applying vibration to said fractured ductile metal part portions in a state where they are apart from each other.   
   
   
       4 . A fracture surface treatment apparatus of a fractured ductile metal part according to  claim 3 , said fracture surface treatment apparatus repeating an operation of applying said vibration by means of said vibration applying means and an operation of pressing the fracture surfaces of said fractured ductile metal part against each other alternately at a specified number of times by means of said face fitting means. 
   
   
       5 . A manufacturing apparatus of a fractured ductile metal part being fractured and having its fracture surfaces treated, said manufacturing apparatus comprising the fracture surface treatment apparatus according to  claim 3 , fitting halved mandrel portions into a penetrative bore of the ductile metal part having the penetrative bore, and driving a wedge in between said halved mandrel portions and thereby fracturing said ductile metal part.