Grinding machine with liquid coolant injection nozzle

Abstract

A grinding machine for bearing rings, the machine includes a frame, a rotating grinding wheel movable in rotation around a first rotation axis and a nozzle adapted to inject a liquid coolant on a peripheral portion of the grinding wheel. The nozzle is mounted on a first slide movable in translation along a second axis perpendicular to the first rotation axis and the position of the slide along the second axis is controlled by a mechanical linkage connected to a movable part of the machine whose position depends on the outer diameter of the grinding wheel.

1 . A grinding machine for bearing rings, the machine including
 a frame;   a rotating grinding wheel movable in rotation around a first rotation axis;   a nozzle adapted to inject a liquid coolant on a peripheral portion of the grinding wheel;   wherein the nozzle is mounted on a first slide movable in translation along a second axis perpendicular to the first rotation axis and in that the position of the slide along the second axis is controlled by a mechanical linkage connected to a movable part of the machine whose position depends on the outer diameter of the grinding wheel.   
     
     
         2 . The grinding machine according to  claim 1 , wherein the movable part of the machine moves in translation, along an axis perpendicular to the first rotation axis, depending on the outer diameter of the grinding wheel. 
     
     
         3 . The grinding wheel according to  claim 1 , wherein the movable part is a dressing slide of the machine, and is integral in translation with a tool for shaping the peripheral portion of the grinding wheel. 
     
     
         4 . The grinding machine according to  claim 1 , the mechanical linkage further comprising a lever movable in rotation around a second rotation axis parallel to the first rotation axis and in that the lever includes a first arm articulated on the first slide and a second arm articulated on a member driven in translation by the movable part of the machine. 
     
     
         5 . The grinding machine according to  claim 4 , wherein the member is a rod with an end in contact with the movable part of the machine and the rod is movable in translation when it is driven by the movable part. 
     
     
         6 . The grinding machine according to  claim 4 , wherein:
 a first distance is measured radially with respect to the second rotation axis, between this axis and an articulation point between the first arm and the first slide; and   a second distance is measured radially with respect to the second rotation axis, between this axis and an articulation point between the second arm and the driven member,   wherein the first distance equals a second distance.   
     
     
         7 . The grinding machine according to  claim 4 , wherein:
 the articulation between the first arm and the first slide occurs via a first pin mounted on one of the slide or on the first arm and engaged in a first receiving hole provided in the first arm or in the slide;   the articulation between the second arm and the driven member occurs via a second pin mounted on one of the driven member or on the second arm and engaged in a second receiving hole provided in the second arm or in the slide; and   the first and second pins extend each along an axis parallel to the first rotation axis.   
     
     
         8 . The grinding machine according to  claim 7 , wherein the first pin and the second pin are respectively mounted on the first slide and on the driven member and the first and second receiving holes are oblong slots provided respectively in the first arm and the second arm, with their longitudinal directions extending radially with respect to the second rotation axis. 
     
     
         9 . The grinding machine according to  claim 1 , further comprising an elastic element for pushing the nozzle away from the grinding wheel. 
     
     
         10 . The grinding machine according to  claim 9 , wherein the elastic element includes a spring mounted around the rod, between a collar of the rod and a part fixed with respect to the frame. 
     
     
         11 . The grinding machine according to  claim 10 , wherein the first slide includes an external channel that connects the tube to a fitting for connection of the coolant inlet tube. 
     
     
         12 . The grinding machine according to  claim 5 , wherein the elastic element includes a spring mounted around the rod, between a collar of the rod and a part fixed with respect to the frame. 
     
     
         13 . The grinding machine according to  claim 12 , wherein the first slide includes an external channel that connects the tube to a fitting for connection of the coolant inlet tube. 
     
     
         14 . The grinding machine according to  claim 1 , wherein the mechanical connection between the nozzle and the first slide includes a tube where the liquid coolant flows to feed the nozzle and in that the slide is connected to a coolant inlet tube.