Method and device for forming short side end of unequal angle steel

Abstract

A short-side end molding device has a molding roller (20) that, in a hot rolling step for an unequal angle steel, presses and molds an end part (201b) of the short side (201) of an unequal angle steel (200) that has undergone an intermediate rolling step or a finishing rolling step using a molding part (22), as the end part (201b) is caused to pass over the molding part (22), which is formed in an outer peripheral surface (21), in the circumferential direction of the molding part. The molding part (22) is formed in a recessed shape over the entire circumference of the outer peripheral surface (21) of the molding roller (20). The shape of the molding roller (20) along the axial direction is an arc shape and a linear shape adjacent to the arc shaped portion (22a), and the linear shaped portion (22b) matches the tangent (t) of the adjacent end part (22c) of the arc shaped portion (22a).

Description

technical field [0001] The present invention relates to the forming technology of the short side end of unequal-side and unequal-thickness angle steel and other unequal-side angle steel often used in shipbuilding. Background technique [0002] Angles with unequal sides and unequal thicknesses, which are often used in shipbuilding, have been manufactured by hot rolling. Specifically, in the hot rolling process, the steel slab as the raw material is heated in the heating process, and then, in the rough rolling process and the intermediate rolling process, multi-pass shape rolling is performed by each rolling mill to form a nearly square shape. cross-sectional shape. Then, in the finish rolling process, one pass of form rolling is performed to process it into a predetermined cross-sectional shape. [0003] Figure 9 It is a perspective view showing the shape of the unequal-thickness angle steel 200. [0004] Such as Figure 9 As shown, the unequal sides and unequal thickness...

AI Technical Summary

Problems solved by technology

[0007] like Figure 10A As shown in (the circled area), on the short side 201, if the end surface 201b1 and the outer surface 201a are discontinuous and have edges formed, it is easy to cause uneven coating during coating.

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