Abstract

Machine for grinding given objects, such as a machine for sharpening the knives of blades, constituted by a frame, a support mounted in mobile manner on said frame, means for regulating the position of the support relative to the frame, grinding wheels mounted on one of the two members, the frame or the support, a device able to carry or hold at least one article to be ground, mounted on the other of the two said members, the frame or the support and, a device for defining a shape to be reproduced, for detecting said shape and for controlling the relative positions of said grinding wheels and said device carrying or holding at least one article to be ground. The device for the control, the definition and the detection of a shape to be reproduced has a template mounted on one of the two members, the frame or the support, and a contact sensor of said template mounted on the other of the two said members, the frame or the support, the profile of the template is contained in a plane substantially parallel to the plane of the face or faces of the articles to be ground and the point at which the sensor is in contact with the template is itself substantially contained in the plane perpendicular to the face or faces to be ground passing through the grinding zone.