Roll forming roller and roll forming method using the same

Abstract

The invention provides a roll forming roller, and even if the shape of a section of a processed workpiece is complex, wrinkles, warping and buckling of an appearance surface do not occur and arbitrary curved surface bending processing can be realized without damaging the appearance surface. The roll forming roller is used for performing roll forming on a processed workpiece having an appearance surface, and is characterized in that the roll forming roller has a rotating shaft and a contact part, the contact part rotates with the rotating shaft being the center and abuts against the processed workpiece, the contact part has a first contact part and a second contact part, the first contact part abuts against the appearance surface of the processed workpiece along a direction parallel to the rotating shaft, the second contact part abuts against the appearance surface of the processed workpiece along a direction vertical to the rotating shaft, the first contact is made of a first resin material having elasticity, and the second contact part is made of a second resin material whose hardness is higher than that of the first resin material.

Description

technical field [0001] The present invention relates to a roll forming roll and a roll forming method using the roll forming roll. Background technique [0002] Roll forming is a forming method for bending a curved surface using at least three rolls, and is a forming method that can impart various curvatures by adjusting the pressing amount of the rolls. Therefore, in the production of bent parts produced in small quantities with many varieties, the number of dies can be reduced and miniaturized, so reductions in production costs and die replacement time can be achieved. [0003] Conventionally, all rolls of common roll forming rolls are metal rolls, and the roll shape is also a simple cylindrical shape, and many formed products are large-diameter pipes. [0004] In addition, there is also a roll forming roll in which an elastic body is used on a part of the roll surface of the roll forming roll as in Patent Document 1, thereby improving forming accuracy and forming a small...

AI Technical Summary

Problems solved by technology

However, in stretch bending, it is necessary to prepare molds according to the cross-sectional shape, curved surface shape, and material of the forming object. In addition, it takes a lot of time to replace the molds, so it is not suitable for high-variety low-volume production.

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