Efficient roll forming method for large medium-thickness-plate conical cylinder

Abstract

The invention discloses an efficient roll forming method for a large medium-thickness-plate conical cylinder. The efficient roll forming method includes calculating, blanking, setting out and unfolding to form sectorial steel plates according to the neutral surface of a product structure drawing, and dividing equally and scribing inner and outer arcs of the sectorial steel plates; adjusting an included angle between a feed roller and a support roller of a roller-type veneer reeling machine to be not smaller than a half taper angle of the conical cylinder, disposing the scribed sectorial steel plates between the rollers, and aligning a feed roller bus to scribed lines of the adjusted sectorial steel plates to evenly apply pressure in a left-right circulation mode; measuring curvature radiuses of inner or outer arcs of upper and lower openings of sectorial workpieces subjected to even pressure application by an arc template; according to detection conditions of the curvature radiuses, adjusting the distance of the support roller and / or the height of one end of the support roller to correct the arc curvature radiuses, and aligning the feed roller to the scribed lines of the sectorial steel plates to continue to evenly apply pressure in a left-right circulation mode; assembling and welding the sectorial workpieces. The efficient roll forming method has the advantages of high production efficiency, small shape and dimension errors, simplicity in operation, high safety, environment protection, energy conservation and full utilization of equipment capacity.

Description

technical field [0001] The invention belongs to the technical field of steel structures, in particular to a method for manufacturing large and medium-sized thick plate containers used in metallurgy, building materials, chemical industry, and mining industries. A high-efficiency roll forming method for large medium-thick plate cones with high safety, environmental protection and energy saving, and full utilization of equipment capabilities. Background technique [0002] The coiling on the plate rolling machine is actually under the action of external force, the outer layer fibers of the steel plate are elongated, and the inner layer fibers are shortened to produce bending deformation (the middle layer fibers remain unchanged). Containers composed of large medium-thick plate cones are widely used in metallurgy, building materials, chemicals, and mining industries. The cone workpiece can be regarded as the busbar of the cone workpiece rotating 360 degrees around the center line...

AI Technical Summary

Problems solved by technology

[0007] 2) When the plate width > 2500mm, any plate thickness cannot be rolled;

[0011] It can be seen from the above that because the rolling of the cone needs to overcome the additional torque, the rolling capacity of the straight roll and the roll of the cone is quite different, so the same equipment cannot roll special cones such as small cone angles. The capacity of the equipment is not fully utilized for cones with large angles and plate thickness. In addition, four-column presses or single-arm presses are generally used to form large-scale medium-thick plate cones. However, due to the complex mold making, long cycle time, and the need for section-by-section pressure forming, the lifting and rotating are blocked by the punch, and it is not easy to operate the middle process, so the production efficiency is low

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