CNC grinding machine

A CNC grinding machine for grinding a workpiece such as a gear or a cam, comprising:

• a base located in a horizontal first plane formed by two perpendicular axes;
• a work station capable of mounting thereon said workpiece, and driven by a first servomechanism to be capable of moving in said first plane and rotating about a third axis perpendicular to said first plane;
• a column defined in a second plane perpendicular to said first plane and one of said two axes thereof;
• a grinding wheel driven by a second servomechanism to be capable of moving along a first line on said second plane;
• said first line being rotatable about a fourth axis perpendicular to said second plane;
• a CNC system including an NC controller and a computer for controlling said first and second servomechanism to work on said workpiece according to an initial grinding program;
• a measuring probe mounted on said base driven by a third servomechanism controlled by said CNC system, and capable of moving along a second line perpendicular to said first plane;
• a securing block mounted on said work station for ensuring that said workpiece is well secured thereon;
• a grinding wheel dresser mounted on said securing block, and capable of moving and rotating in cooperation with said work station;
• a measuring program contained in said CNC system for controlling the movements of said first and third servomechanisms to measure the working errors on said workpiece after a testgrinding for amending said initial grinding program;
• and
• a wheel-dressing program contained in said CNC system for controlling the movements of said first and second servomechanisms to dress the grinding wheel as needed.