Patent ID: 7004816

Claim:
A grinding method for a vertical type of double disk surface grinding machine comprising: a pair of rotating grinding wheels vertically opposed to each other and vertically movable; a moving table for moving a work having a work holding jig, wherein a position of the work can be changed by the moving table to and from a grinding position and to and from a work attaching/detaching position, wherein at the grinding position, both grinding wheels are moved from standby positions to grinding positions so that the upper and the lower surfaces of the work are simultaneously ground, said method comprising: in a first step, measuring vertical positions of the upper and the lower surfaces of the work to be ground prior to a grinding operation by means of a pre-grinding dimension measuring instrument which are disposed in a vicinity of the work attaching/detaching position, wherein the standby positions of the grinding wheels are set based on the pre-grinding measured values; in a subsequent step, moving the work to the grinding position and the moving grinding wheels at a high feeding speed from the set standby positions to one of grinding start positions in contact with the work or start positions immediately before making contact with the work; and in a further subsequent step grinding the work at a grinding speed lower than the feeding speed.