Patent ID: 9616429
Date: 2017-04-11
CPC Classifications: B02C,G01B

Claim:
1. A control and positioning system for the indication of the mounting condition of an exchangeable wear lining element at a surface at a wall that is subject to wear, which is constituted by the inner surface of a rotating drum at an ore grinder, and where the wear lining element is supported at the free end of a manoeuvrable arm that is a component of a lifting arrangement that is controlled during the handling of the wear lining element during a mounting operation by a crane operator, whereby the wall is provided with a set of mounting holes and the wear lining element is equipped on its lower surface with attachment means, whereby the wear lining element is intended to be tightened against the surface by means of supplementary attachment means that are introduced through the mounting holes, wherein the system comprises: a first reference system formed by the mounting holes of the wall; a second reference system formed by the attachment means located on the lower surface of the wear lining element; a two-dimensional sensor that is arranged to be stationary at the outer surface of the wall which is located on the opposite side of the wall of the mounting surface to that which is exposed to wear, in such a manner that the field of view of the sensor contains the lower surface of the wear lining element viewed through the mounting holes, whereby the sensor is arranged to transmit an electrical signal that represents an image of the relative position between the first and second reference systems, and with the guidance of which image the mounting position of the wear lining element at the wall can be determined by the crane operator.