JP2008500908A5 - - Google Patents

Claims (8)

  A tip fixed steady rest clamp for holding a member to be polished on a polishing machine, in particular for holding a drill having an end with a large length to diameter ratio, each of said clamps having a rear end and A clamp body (1) integrally formed with two parallel arms (3, 4) having a front end, the clamp body being a central region for fixing the clamp to the support ( 2) and an elastically deflectable finger (12) cut out from the clamp body so as to form a pivot support (5) and connect the central region to the two arms. 13, 14, 15), and the front end portion by the arm pivotally supported in the pivot support rotating device by the control member (26) acting on the rear end portion of each of the two arms. In a stationary position in clamps that move away from or close to each other By means of the control member (26), the front ends of the two arms (3, 4) approach each other so that the clamp is in the closed position, while moving to the operating position, the control member is moved to the shaft. A clamp characterized in that the pivoting / rotating device is designed (5) so that the pivoting device is deformed and the front ends of the two arms are separated from each other.   The front ends of the two arms are provided with a holding jaw (17) adapted to the size of the member to be polished (25) to be held. 2. Clamp according to claim 1, characterized in that it is fixed by fastening means (29, 30, 31) so as to prevent movement.   The pivot support rotation device is formed of four fingers (12, 13, 14, 15) extending on one side of the central region and symmetrically spreading in three directions. Two virtual pivot support axes (a, b) are defined when the support pivot device (5) is deformed, and each of these virtual pivot support axes is a pivot support axis of each of the arms. Clamp according to claim 1, characterized in that the finger meets each of the arms (3, 4) in two adjacent positions.   In the clamp body (1), the space (11) between the peripheral edge of the central region (2), the four fingers (12, 13, 14, 15), and the front ends of the two arms The clamp according to claim 3, characterized in that is a curvilinear slot or opening machined by a controlled tool, and wherein the clamp body is made of a metal with suitable elastic deformation.   The central region (2) is a part of the clamp body (1) and has a rectangular shape, and can be accurately positioned on the support using a center hole and a pin for fastening to the support. The four finger-like bodies of the pivot support rotation device are located on the front end portion of the arm within the side of the central region. The clamp according to claim 4, wherein the clamp is attached to a central portion of the facing side.   The clamping jaw (17) is positioned on the arms (3, 4) by pins (29), fastened by bolts (31), fixed to the clamp arms by bolts and fixed by pads The clamp according to claim 2, wherein:   At least one of the protrusions (20) of the clamping jaw (17) comprises a V-shaped groove (22) adjusted to fit the size of the cylindrical end of the member (25) to be held. 7. A clamp according to claim 2 or 6, characterized in that the cylindrical end portion is supported on at least one side along two generatrix lines defining the groove profile. Both protrusions (20) of the two clamping jaws (17) are provided with V-shaped grooves (22) adjusted to fit the size of the cylindrical end of the member to be held. The clamp according to claim 7, wherein: