The characteristic of bending strip center groove design method

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Center method of bending forming process starts from the inner part of the strip bending deformation, bending deformation radius R remains unchanged, and is equal to the extrusion roll pass radius or the finished tube radius.Then gradually increase the deformation Angle between theta, has been increased to 2 theta = 180 DHS.That is, forming to half full width.Strip edge vertical stand.Enter a few shelves roller forming in a closed groove with a guide ring.The thickness of the guide ring gradually thinning, finally forming for the cylinder tube.

The advantage of this forming method is: use less forming frame number and not vertical roll.Defect is strip edge rises high, edge, edge are prone to wrinkle or bulge, forming quality is bad, increased the forming roll cutting depth, the corresponding increase roll diameter.So, applies only to a small diameter tube billet forming has not adopt this method in actual production.

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