Method for rounding edges of brittle flat materials, comprises connecting two electrodes forming an electrode pair with a high voltage alternating current source, where an electric alternating field forms itself between the electrodes

摘要

The method for rounding edges (2) of brittle flat materials (3), comprises connecting two electrodes (1) forming an electrode pair with a high voltage alternating current source (7), where an electric alternating field (E) forms itself between the electrodes between which a hand spring is arranged so that an electric current flows that guides a flat material for heating and connecting an edge of the flat material. The edge of the flat material is led through the electric alternating field vertically to the field strength lines of the electric alternating field with a given relative speed. The method for rounding edges (2) of brittle flat materials (3), comprises connecting two electrodes (1) forming an electrode pair with a high voltage alternating current source (7), where an electric alternating field (E) forms itself between the electrodes between which a hand spring is arranged so that an electric current flows that guides a flat material for heating and connecting an edge of the flat material. The edge of the flat material is led through the electric alternating field vertically to the field strength lines of the electric alternating field with a given relative speed. The field strength lines strike and assert under an impact angle on an area of the edges present itself in electric alternating field so that a reinforcing process is released from pre-heating and releasing of load carriers in the area until a quantity of released load carriers is available, where an applied voltage causes a breakthrough and effects a certain discharge current and continuously flows the current. The rounding of the edge causes in the direction of the relative movement of progressive material removal. The electric alternating field is applied in the flat material so that the field strength lines strike on the surface of the flat materials, where the edge moving through the electric alternating field has a constant thickness. The time duration of the local heating is pre-determined through the demand of the relative velocity and the height of the applied voltage. The area of the edge is pre-heated before it is led through the electric alternating field arranged in the direction of the relative movement of the electric alternating field. The additional pre-heating is carried out through an additional alternating field or through the effect of a laser beam. An ohmic resistance is connected during entering the breakthrough, where the height of the discharge current and the flowed current is adjusted.