Device for Clamping a Tool Insert in a Grinding Machine

Abstract

The insert ( 2 ) is placed on the reception surface ( 10 ) of the interchangeable support ( 9 ). A simple movement of the piston ( 35 ) towards the right in the barrel ( 7 ) of the headstock ( 1 ) drives the cam ( 32 ) so that the lever ( 13 ) pivots and moves, introducing its nose ( 15 ) into the bore ( 27 ) of the insert, the nose drawing the insert rearwards, which is then pressed against the vertical face ( 11 ) of the support, the insert also being pressed against the horizontal face ( 10 ) of the support under the effect of the locking shoe ( 13 ), which makes it possible to fix the insert in an exactly determined position. The measuring device ( 12 ) determines this position by means of a position sensor ( 20 ) and controls the grinding operations.

1 - 8 . (canceled) 
   
   
       9 . A device for clamping a tool insert in a grinding machine, in particular for sharpening it, comprising a body intended to be mounted on a headstock of the machine and provided with an interchangeable support which has reception surfaces for the insert, and a clamping lever pivoting in a slot in the body, the said clamping lever being provided with a locking nose and a support shoe, these elements being brought into abutment on the insert by moving the clamping lever under the effect of the movement of a piston housed in the headstock and controlling the lever by means of a cam. 
   
   
       10 . Device according to  claim 9 , wherein the interchangeable support is an attached piece, fixed to the body and sized so that the reception surfaces position the insert precisely with respect to the axis of the piston. 
   
   
       11 . Device according to  claim 9 , wherein the locking nose of the clamping lever is conformed so as to engage in a bored hole in the insert and act on the flank of this hole. 
   
   
       12 . Device according to  claim 11 , wherein the interchangeable support has two reception surfaces for the insert, oriented perpendicular to each other, one of them being perpendicular to the axis of the piston. 
   
   
       13 . Device according to  claim 11 , wherein the support shoe is an independent piece mounted on the clamping lever by means of a pin allowing a pivoting of the shoe which brings one edge of the latter into abutment against a support surface of the lever when a stop surface of the shoe abuts against a support surface of the insert. 
   
   
       14 . Device according to  claim 11 , wherein the pivoting of the clamping lever in a slot in the body is effected by a cylindrical pin engaged in an oblong hole in the cheeks of the body, so as to allow a combined rotation and translation movement of the clamping lever with respect to the body. 
   
   
       15 . Device according to  claim 9 , wherein the said cam is fixed at the end of the piston of the headstock and comprises a profile with a notch extended on each side by a ramp, these profile elements cooperating with a rear head of the lever. 
   
   
       16 . Device according to  claim 9 , wherein a measuring device comprising a position sensor is associated with the body of the device, so as to engage in a bore of the insert held clamped by the lever, in order to detect its exact position and control the grinding operations, the cutting edge or edges of the inserts being located with respect to the said bore.