An open profile expansion mold

Abstract

The invention discloses an opening type sectional material expansion die which comprises a base (1), wallboards (2), a female die (3), side inner dies (4), male dies (5), rotation pins (7), reset springs (8) and female die adjusting screws (9). The female die (3) is installed on the base (1), the wallboards (2) are installed on the base (1) and are located on the two sides of the female die (3), the side inner dies (4) are installed on the wallboards (2) through the rotation pins (7) and can rotate around the rotation pins (7), the reset springs (8) are arranged in the wallboards (2), the male dies (5) are arranged on the inner sides of the side inner dies (4), and the female die (3) and the side inner dies (4) are matched to form a cavity. The opening type sectional material expansion die has the advantages that the opening type sectional material expansion die can be used for expanding processing of an opening sectional material, no dead angle exists when a workpiece is expanded by designing the tensile track into the combined motion of circulation motion and horizontal motion, and the opening type sectional material expansion die has the advantages of being simple in structure, reliable in clamping and the like.

Description

technical field [0001] The invention relates to a bulging mold of a cold-bending forming production line, in particular to an bulging mold for an open profile. Background technique [0002] The cold-rolled open profile is a strip-shaped profile with an unclosed cross-section and a continuous length direction that is rolled from a thin plate by a cold-bending rolling mill. During production, according to the requirements of use, the open profile should be cut according to different lengths, and the cross-section of the part with a length of about 100mm at one end of the open profile should be expanded to facilitate interlocking of the open profile during installation. The die described in the present invention is a cross-section expansion and expansion device of an open profile matched with a rolling mill. [0003] The central angle of the inscribed circle is greater than 180o due to the positional relationship of several faces of the open profile. Therefore, it is impossib...

AI Technical Summary

Problems solved by technology

The open profile is an open profile. Due to the gap, the uniformity of the tensile stress cannot be guaranteed. In addition, the profile cannot be closed in the length direction. Therefore, the soft mold cannot be used to meet the expansion requirements.

Second, in the traditional method, the sheet is stretched and then expanded, which is also a closed structure, and the material required for the blanking must be left during stretching, so it cannot meet the requirements of the expansion of the open profile.

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