Patent ID: 7055355

Claim:
Method for bending a portion ( 24 ) of an element ( 11 ) in a bending machine ( 12 ), comprising at least a bending assembly ( 14 ), a supporting plane ( 18 ) on which said element ( 11 ) is retained by an arm ( 16 ), and an electronic processing unit ( 32 ), wherein the bending process is filmed by image acquisition means ( 26 ) and displayed on display means ( 36 ), the method comprising a step of setting a nominal value (“γ”) of the angle of bend to be obtained, characterized in that it provides that: the arm ( 16 ) is kept pressed on a segment ( 22 ) of said element ( 11 ) adjacent to said portion ( 24 ) during the whole bending cycle in order to guarantee a safe reference; a movement of the bending assembly ( 14 ) to make said first bend is acquired by a position transducer ( 15 ) and recorded by said electronic processing unit ( 32 ); a first reference indicator (“Z”) is positioned on said display means ( 36 ), with respect to a reference axis (“X”) aligned with said supporting plane ( 18 ), to make a first bend of a nominal value (“γ”); the value of an angle of deviation (“α”) is determined, caused by an elastic return of said bent portion ( 24 ) and a second reference indicator (“Z′”) is positioned, wherein the angle of deviation (“α”) is taken into account; the portion ( 24 ) is bent with a new movement of said bending assembly ( 14 ) until the portion aligns with the second reference indicator (“Z′”); the new movement of said bending assembly ( 14 ) is acquired by said position transducer ( 15 ) and recorded by said electronic processing unit ( 32 ) in order to have a global parameter for obtaining an angle which, taking into account the value of the angle of deviation (“α”) for that element ( 11 ) and of the angle of said first bend, corresponds univocally to said nominal value (γ), and in order to use said global parameter in subsequent analogous or similar bends.