Patent ID: 7690967
Filing Date: 2010-04-06
Classification: B24B

Abstract:
1. A grinding machine comprising: a bed; a work head fixed on the bed; a work spindle rotatably supported by the work head for supporting and rotating a workpiece about a Z-axis; a slide base mounted on the bed and reciprocatively movable in the Z-direction, wherein the slide base is located below the Z-axis; a wheel head mounted on the slide base and reciprocatively movable in an X-direction intersecting with the Z-direction; a rotating grinding wheel carried on the wheel head for grinding a ground portion of the workpiece; a measuring device engageable with the ground portion of the workpiece ground with the grinding wheel for measuring the dimension of the ground portion; a support arm cantilever secured to the slide base for movement with the slide base and not the wheel head, the support arm extending its extreme end in the X-direction to a position which is opposite to the grinding wheel with the rotational axis of the work spindle therebetween; a mechanism provided on the extreme end of the support arm and mounting the measuring device for enabling the measuring device to be brought into engagement with the workpiece from a side of the workpiece opposite to the grinding wheel, wherein the support arm extends in the X-direction to pass over the workpiece being supported on the work spindle; and a support frame taking a gantry shape to straddle over the wheel head and the grinding wheel in the Z direction and having a pair of leg portions secured to the slide base, and wherein the support arm extending in the X-direction is secured to an upper portion of the support frame at its one end opposite to the extreme end, wherein the upper portion of the support frame to which the support arm is secured is on the side of the work head.