Working method for curved surface of a work and an apparatus thereof

Abstract

The first driving shaft 2 is provided with the electric supply equipment 8 such as the metal brush. The second driving shaft 3 is as well too. Further, a nozzle 10 for supplying the conductive coolant is supplied to the grinding portion between the grinding surface 1 a and the surface Wa to be ground is provided. When grinding is carried out, the conductive coolant is supplied from the nozzle 10 and by turning on the electricity to the first driving shaft 2 and the second driving shaft 3 , a voltage is applied between the grinding surface 1 a and the surface Wa to be ground of the work W. Due to electrolysis of that instance, the conductive material of the surface of the grindstone is dissolved in the conductive coolant, simultaneously the clogging of the grinding surface 1 a is solved. Accordingly, a super ball finishing using a grindstone of the quite high grain size becomes possible.

What is claimed is:  
     
         1 . A method for working a curved surface, wherein, when carrying out grinding a curved surface of a conductive work while generating the three-dimensional relative deflection between a grinding surface of a conductive grindstone and a surface to be ground of the conductive work, the method comprises the steps of applying a voltage between the conductive grindstone and the conductive work while supplying an conductive coolant to a grinding portion between the conductive grindstone and the conductive work and carrying out grinding while dressing the conductive grindstone by electrolysis.  
     
     
         2 . A method for working a curved surface comprising the steps of abutting whole of the grinding surface of a conductive grindstone to the surface to be ground of an conductive work, generating a three-dimensional relative deflection between the grinding surface and the surface to be ground, at the time of carrying out grinding a curved surface, applying a voltage to a grinding portion between the conductive grindstone and the surface to be ground of the conductive work, while supplying a conductive coolant between the conductive grinding surface and the surface to be ground of the conductive work, and grinding is carried out while dressing the conductive grindstone by the electrolysis.  
     
     
         3 . A curved surface working apparatus comprising a driving means to generate a three-dimensional relative deflection between the grinding surface of a conductive grindstone and the surface to be ground of a conductive work, a supplying means to supply the conductive coolant between the grinding surface of the grindstone and the surface to be ground of the conductive work and electric supply means to apply voltage to the work and electric supply means to apply voltage to the conductive grindstone and the conductive work.  
     
     
         4 . A curved surface working apparatus according to  claim 3 , wherein said conductive grindstone comprises a cone-shaped grinding surface, said driving means comprises a first driving shaft to drive the grinding surface of the cone-shaped grinding surface of the conductive grindstone to the circumferential direction, a second driving shaft to rotate the conductive work on an axis crossing the first shaft perpendicularly and a deflection means to make the first shaft and the second shaft come close and separate them.  
     
     
         5 . A curved surface working apparatus according to  claim 4 , wherein further a swinging means which makes either one of the first and second shafts or both swung with each other.