PRODUCTION OF BENT CHANNEL FROM SHEET BLANK WITH LONGITUDINAL BANDING IN TRUING AND DEVICE TO THIS END Russian patent published in 2015 - IPC B21D11/20 

FIELD: process engineering.

SUBSTANCE: invention relates to bending-rolling of sheets and can be used for fabrication of aircraft engines from bent channels. Sheet blank passes through banding-rolling machine stands with upsetting of pre-bent walls and/or channel flanges at the last forming stand to produce a resilient swivel. Bending force is applied to said channel at inlet and outlet of said stand to produce preset lengthwise curvature of said channel. Note here that extra guide forces at channel flanges and walls at the exit of the last forming stand preserve the cross-section shape of the channel. Point of application of bending forces at exit of the last forming stand is changed to change the radius of lengthwise curvature of the channel. Note here that the last forming stand bending module and bending-rolling stand are shifted from said last stand in direction of lengthwise bending. Guide elements of bending module interact with channel wall surfaces located in lengthwise bending plane.

EFFECT: higher quality and efficiency.

3 cl, 3 dwg, 1 tbl