| 摘要 |
<p>A method for mechanical machining, in particular for drilling and turning light alloy wheels , comprising prior to the mechanical machining step, a step of orientation and measurement of the wheel including the steps of arranging a device for seating the wheel with at least three seating areas spaced apart from each other angularly at a regular angular pitch and forming respective seating surfaces coplanar with each other and belonging to a common reference plane, a wheel being brought into seating contact on these surfaces with a portion of its front flange, the wheel being approximately coaxial with a central reference axis of the device perpendicular to the reference plane; determining using distance sensing means the radial coordinates of a first plurality of points of a common surface of the flange, the points of this plurality being identified by moving the sensing means radially relative to the central reference axis along respective directions radial to this axis until the flange is intercepted, and calculating by interpolation of the radial coordinates of the first plurality of points; and the step of determining with the sensing means the coordinates of a second plurality of points belonging to a common surface of the flange; and storing the position coordinates of the second plurality of points relative to the reference plane and to the median plane to allow orientated repositioning of the wheel in the subsequent steps of mechanical machining, in order to obtain, at least at the second plurality of points, machined surface areas of flange belonging or arranged parallel to the median plane, so as to compensate for errors of planarity in the wheel flange.</p> |
