Cold rolling forming machine and U-shaped suspension arm plate production and manufacturing method

Abstract

The invention relates to the field of forming equipment, in particular to a cold rolling forming machine and a U-shaped suspension arm plate manufacturing method.The cold rolling forming machine comprises a finishing workbench, a lower die and a plate are arranged in the center of the upper end of the finishing workbench, the plate is arranged at the upper end of the lower die, and an upper die is arranged at the position, located at the upper end of one side of the lower die, of the plate. The method shortens the elastic recovery time, prolongs the rolling time, has good effects of inhibiting stress release, improving plastic deformation and keeping rolling stability, can adapt to material performance changes in a certain range through bend angle adjustment, eliminates internal stress generated by strong rolling after normalizing treatment, and improves the rolling quality. Thermal deformation caused by heat treatment is treated in the finishing section, and the section, longitudinal bending and transverse bending of the profile are further corrected, so that the internal stress of the material of the forming section is effectively controlled, the end springback caused by placement after cutting is reduced, and the new process can meet the production of the U-shaped suspension arm.

Description

technical field [0001] The invention relates to the field of forming equipment, in particular to a cold rolling forming machine and a manufacturing method for a U-shaped boom plate. Background technique [0002] Cold-rolling forming machine is a kind of equipment that cold-rolls steel into a certain shape. The U-shaped boom is in production, and the springback time of transverse bending is long when the rack spacing is large, and the elastic relaxation in the longitudinal direction is too large, which will cause the absorption of forming work. Small, insufficient plastic deformation, it cannot be adjusted to a certain extent according to the change of material properties of the plate and the change of plate thickness, and when the continuous rolling is completed, the residual tensile stress at different points on the same cross section in the longitudinal direction is not the same. In the same way, the longitudinal tensile stress and the transverse stress mutually restrict e...

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Problems solved by technology

[0002] The cold rolling forming machine is a kind of equipment for cold rolling steel into a certain shape. The U-shaped boom is in production. The space between the racks is large and the rebound time of the transverse bending is long. The elastic relaxation in the longitudinal direction will cause the absorption of forming work. The problem of insufficient plastic deformation cannot be adjusted to a certain extent according to the change of material properties and thickness of the plate, and when the continuous rolling is completed, the residual tensile stress at different points on the same cross-section in the longitudinal direction is different. Similarly, the longitudinal tensile stress and transverse stress mutually restrict each other to form a balanced state. When the section steel is cut off, the stress balanced state is broken, which will cause new springback and cause the shape of the U-shaped boom plate to change, so there are defects in use.

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