Method and machine for balancing of disc blades
AssigneeC.M.T. Utensili S.P.A.
InventorPiergiorgio Pozzo
Life of this patent
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Abstract
A method for balancing disc blades comprising the steps of: determining the initial position of the center of mass of the disc blade to be balanced with respect to its main axis; calculating/determining the number, the position and/or the dimensions of one or more balancing holes eccentric with respect to said main axis and necessary for removing an amount of material sufficient to bring the center of mass of the disc blade at a distance from the main axis lower than a predetermined maximum limit value; and forming said balancing hole or holes on the central disc in an eccentric position with respect to said main axis.
Claims20
A method for balancing of disc blades which comprise a central disc and a series of protruding teeth jutting out cantilevered from the perimeter edge of the central disc;
- said method being characterised in that it comprises the steps of:
- determining the initial position of the center of mass of the disc blade to be balanced with respect to its main axis;
- calculating/determining the number, the position and/or the dimensions of one or more balancing holes eccentric with respect to said main axis and necessary for removing an amount of material sufficient to bring the center of mass of the disc blade to a distance from the main axis less than a predetermined maximum limit value;
- and
- forming said balancing hole or holes on the central disc in an eccentric position with respect to said main axis.
A machine for balancing of disc blades characterised by comprising:
- a ground-resting and self-supporting rigid structure;
- a blade-holder spindle which is fixed to the rigid structure with the capability of freely rotating about a rotation axis, and is adapted to support and rigidly lock a disc blade arranging it substantially coaxial to the rotation axis, on a laying plane perpendicular to said rotation axis;
- a motor assembly which is adapted to drive the blade-holder spindle into rotation about the rotation axis;
- an electronic detecting device which is located on the blade-holder spindle and is adapted to detect the unbalancing of the disc blade engaged on the blade-holder spindle;
- a drilling assembly which is fixed to the self-supporting rigid structure beside the blade-holder spindle, with the capability of moving from and towards said laying plane;
- and a moving apparatus which is adapted to move, on command, the drilling assembly from and towards said laying plane so that the drilling assembly can reach and pierce the disc blade temporarily fitted on the blade-holder spindle, in order to form one or more balancing holes on said disc blade.
A disc blade comprising a central disc and a series of protruding teeth jutting out cantilevered from the perimeter edge of the central disc,
- said disc blade being characterised by additionally comprising one or more balancing holes that are formed on the central disc in an eccentric position with respect to the blade rotation axis.
Dependencies are inferred from the claim text.