LVD additional axis smart crowning system compensates for material inconsistencies

Smart crowning is a programmable crowning V-axis system for LVD's PPEB-H Series and Easy-Form Series press brakes. A press brake's crowning system ensures the ram and table are parallel during the bending process. Traditional crowning tables compensate for the symmetric deflection of the press via a single V-axis and are ideal when material properties are the same over the length of the part. When properties are inconsistent (particularly with heavier or longer workpieces), smart crowning provides an additional axis that allows for additional independent asymmetric compensation.

LVD's smart crowning system uses 'smart segments' and 'smart actuators' that operate individually to provide independent compensation. Smart segments are mechanically connected in a 'caterpillar' linking configuration so that it is impossible to program an inappropriate step in crowning to prevent damage to the crowning table and tooling.

In automatic mode smart crowning in conjunction with Easy-Form laser measures angles at several points along the length of the sheet under pressure, up to a maximum of 16 points. Material spring-back is then measured in the centre of the press brake and values for individual smart crowning actuators are identified. The smart crowning system then adjusts to provide an accurate bend angle over the complete workpiece length.

Author
Celia Cadwallader

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LVD Ltd

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