Thin lengthened backer for bending

The utility model discloses a thin lengthened backer for bending, which comprises a backer main body and a mounting hole, and the backer main body comprises a support part, a contact part and an extension part; the mounting hole is formed in the supporting part; the contact part is arranged at the tail part of the supporting part and is in a multi-stage step shape; the extension part is arranged at the bottom end of the contact part; the thickness of the extension part is smaller than that of the contact part. Due to the step-shaped design, the backer has better compatibility, and different steps can meet the bending requirements of different lengths and angles; the arrangement of the extension part facilitates the bending of the narrow edge, and meanwhile, the thickness of the extension part is relatively thin, so that the problem of machine early warning caused by interference due to the fact that the bending upper die is too close to the backer during bending operation can be avoided. 本实用新型公开了一种折弯用薄型加长靠山，包