Double moving column grinder with simultaneous two wheel grinding

Abstract

A grinding machine for grinding bulky workpieces of considerable length, such as frames, columns and tables of machine tools. Said grinding machine comprises at least one machining table on which a workpiece to be ground is placed, at least two columns linked to a single carriage, said carriage moving longitudinally over a base parallel to said machining table, and at least one wheelhead affixed to each of said columns, each one of said wheelheads comprising its own independently operated vertical and transverse drive means and at least one of said wheelheads being capable of angle movement. So, said wheelheads have a common longitudinal movement and independent vertical and transverse movements, so that said wheelheads can work simultaneously.

What is claimed is:  
     
         1 . A grinding machine for grinding bulky workpieces of considerable length, such as frames, columns and tables of machine tools, comprising: 
 at least one machining table on which a workpiece to be ground is placed;    at least two columns linked to a single carriage, said carriage moving longitudinally over a base parallel to said machining table; and    at least one wheelhead affixed to each of said columns, each one of said wheelheads comprising its own independently operated vertical and transverse drive means and at least one of said wheelheads being capable of angle movement;    thereby said wheelheads having a common longitudinal movement and independent vertical and transverse movements, so that said wheelheads can work simultaneously.    
     
     
         2 . The grinding machine of  claim 1 , wherein said columns are facing each other.  
     
     
         3 . The grinding machine of  claim 1 , wherein the movement of said carriage over the base is effected by means of a hydrostatic slideway.  
     
     
         4 . The grinding machine of  claim 1 , wherein the longitudinal movement of the carriage is governed by means of a rack and pinion system.