Forming method based on fixed die moving roll variable cross-section roll bending equipment

Abstract

A forming method based on fixed-die moving roll variable-section roll bending forming equipment, wherein the forming machine includes an upper die, a lower die, a forming roll set, a mold opening and closing mechanism, a forming roll set movement mechanism and a base; the lower die is fixed on the base The upper and upper molds are connected with the opening and closing mechanism, and the upper mold can be moved along the Z direction; the length of the upper mold and the lower mold is equal, and its length is not less than twice the length of the forming unit required by the formed part; the forming roll group is left and right Symmetrically arranged on both sides of the upper die and the lower die, the forming roll set is composed of multi-pass forming roll pairs, and the forming angle of the forming roll pairs increases gradually from the first pass to the last pass. The roller spacing of the same pass of the invention can be adjusted, which can effectively solve the problem of roll forming of variable cross-section parts with deep and narrow cross-section shapes; reduces the complexity of the equipment, and has the characteristics of simple maintenance, economical and durable equipment; it can be used The product quality of variable section roll forming has been greatly improved.

Description

technical field [0001] The invention relates to the technical field of roll forming technology, in particular to a forming method based on fixed die moving roll variable cross-section roll forming equipment. Background technique [0002] In recent years, variable cross-section roll forming technology has become a hot research topic in the field of roll forming. Several prototypes of variable cross-section roll forming production lines have been developed at home and abroad. However, the existing variable cross-section roll forming technology has certain restrictions on the cross-sectional shape and web width of the part, and its forming process determines that there are various inherent defects in the forming process of the part, and these inherent defects are in the forming process. The process cannot be effectively eliminated, and the forming accuracy of the parts cannot be guaranteed. Especially for deep and narrow variable cross-section parts, due to the limitation of t...

AI Technical Summary

Problems solved by technology

However, the existing variable cross-section roll forming technology has certain restrictions on the cross-sectional shape and web width of the part, and its forming process determines that there are various inherent defects in the forming process of the part, and these inherent defects are in the forming process. cannot be effectively eliminated during the process, and the forming accuracy of the parts cannot be guaranteed

Especially for deep and narrow variable cross-section parts, due to the limitation of the roll placement space, there are great difficulties in forming such parts. In many cases, the existing variable cross-section roll forming process cannot even be formed.

Moreover, due to the difference in the springback angle between the variable cross-section area and the constant cross-section area of ​​the part, the control of the forming accuracy of the part becomes very complicated, and there is no effective technical way to solve it.

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