Machine for removing the sharp edge in plates in general and in particular in glass plates

Abstract

A machine for removing sharp edge in plates in general and in glass plates in particular, comprising a frame for the support and advancement of a plate on which there is at least one station for arrissing an edge of the plate, the arrissing station comprising an upper tangential grinding wheel and a lower tangential grinding wheel which have a working profile which is inclined at 45° with respect to the rotation axis of the grinding wheels and can engage respectively an upper edge and a lower edge of the plate being worked.

Description

[0001]The present invention relates to a machine for removing the sharp edge in plates in general and in glass plates in particular.BACKGROUND OF THE INVENTION[0002]As is known, in the case of plates which are subject to cutting, sharp edges are formed which can be dangerous and consequently must be removed.[0003]Considering, merely by way of example, the case of glass plates, machines commonly known as arrissing machines are currently commercially available which are designed to remove part of the edge, thus eliminating the sharp arris.[0004]Such removal operations are performed typically by means of diamond belts which engage the arrises of the plate at a 45° angle with respect to the plane of the glass pane and move substantially at right angles to the advancement of the plate.[0005]Other known solutions use peripheral grinding wheels having a V-shaped transverse cross-section, which allows to perform arrissing simultaneously on both arrises of the edge.[0006]Another known soluti...

AI Technical Summary

Benefits of technology

[0011]The aim of the invention is to solve the problems described above by providing a machine for removing the sharp edge in plates in general and in glass plates in particular, which allows to provide uniform and homogeneous removal of the sharp edge on all arrises, thus obtaining a significant increase in machining quality.

[0012]Within this aim, an object of the invention is to provide a machine which allows to increase considerably the machining speed while solving the problem of uneven wear of the grinding wheels that are used.

[0013]Another object of the present invention is to provide a machine which, thanks to its particular constructive characteristics, is capable of giving the greatest assurances of reliability and safety in use.

[0014]Still another object of the present invention is to provide a machine for removing the sharp edge in plates in general and in glass plates in particular which can be obtained easily starting from commonly commercially available elements and materials and is also competitive from a merely economical standpoint.

Problems solved by technology

As is known, in the case of plates which are subject to cutting, sharp edges are formed which can be dangerous and consequently must be removed.

Generally, known solutions produce an irregular removal of the sharpness of the arris along the entire length, a defect particularly observable in systems with a grinding wheel which is in a fixed position with respect to the glass pane, since the sharp edge of the plate has a linearity error caused by the preceding cutting operation and most of all there is a mismatch between the upper sharp edge and the lower sharp edge caused by the typical irregularity of glass plate cutting operations.

Another problem encountered with the solutions of the background art is due to irregular removal at the end of the sharp edges, due to incorrect positioning, during the initial step, of the abrasive element with respect to the plate.

Moreover, known solutions suffer additional problems in case of a plate thickness change, since only the abrasive belt is capable of adapting, within a certain interval, to the thickness variation.

Another problem further consists in that the grinding wheels that are used undergo localized wear, which creates considerable machining variations, and therefore it is necessary to perform adjustments frequently.

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