JPS55164465A - Threading grinder - Google Patents

Abstract

PURPOSE: To grind a work for forming a spiral groove of a substantially constant depth in the outer surface thereof, by bringing a rotating grinding wheel into contact with the outer surface of the work to form a groove, in the latter, of a depth corresponding to a distance by which the grinding wheel is projected from a contactor, while gradually changing axial positions of the grinding wheel and work.

CONSTITUTION: A nut 3b is turned to set a surface of a contactor 3b in a position a little to the center of a grinding wheel 2 from the periphery thereof. The small distance referred to above between the surface of the contactor 3b and the periphery of the grinding wheel 2 corresponds to the depth of a groove to be formed in the outer surface of a work W. An arm 1 is fallen in a horizontal state toward a shaft 4, and the grinding wheel 2 is placed on the work W. A groove is formed in the outer surface of the work W by the peripheral portion of the grinding wheel 2 to a depth at which the contactor 3b comes into contact with the outer surface of the work W. As the grinding operation progresses, work W is rotated in accordance with the rotation of a pulley 4f, and a screw 5a is also rotated in accordance with rotation of a pulley 5b, to move a shaft 4, i.e. the work W to right. Thus, a spiral groove is formed in the outer circumferential surface of the work W by a grinding wheel.

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