Method for precision forming by continuous free bending

A method for precision forming by continuous free bending, comprising the following steps:

• (1) extracting a curved axis from a bent component, establishing a correlation equation of the continuous curved axis f(x) to a bending radius R, and determining a bending radius R at a real-time location in the curved axis;
• wherein the correlation equation of f(x) to a bending radius R in step (1) is expressed as:
• R
• n
• =
• (
• 1
• +
• f
• ⁡
• (
• x
• )
• 2
• )
• 3
• 2
• |
• f
• ⁡
• (
• x
• )
• "
• |
• ,
• wherein n represents a point n in the curved axis, while Rn a bending radius corresponding to the point n;
• (2) establishing a correlation model of a bending radius R to an eccentric distance U of a bending die to obtain correlations of f(x) to bending parameters;
• and
• (3) constructing a complete correlation model among f(x), R, U, and t based on a relational equation of an eccentric distance U to movement time t of the bending die;
• and
• (4) controlling the free bending based on the eccentric distance U and the movement time t, to enable the precision forming of the bent component by continuous free bending.