Rolling and cold-bending forming manufacturing method of window-shades for steel structure

Abstract

The invention relates to a rolling and cold-bending forming manufacturing method of window-shades for a steel structure, relating to the processing technology of metal pieces. The method adopts a rolling and cold-bending forming technology and is characterized in that an upper row and a lower row of rolling wheels are arranged on a rolling and cold-bending forming machine, and the shape of the rolling wheels are gradually changed into window-shades from cylinders from the inlet end to the outlet end of the rolling and cold-bending forming machine; and steel belt coiled materials having the same width with the unfolding materials of the window-shades are sent to the inlet end of the rolling and cold-bending forming machine and are cut off at the outlet end by hydraulic shears. The invention simplifies production routine, greatly enhances production efficiency, improves work efficiency at least over 8 times, abandons manufacture of complex dies, enables the production to be adjusted with the change of materials, enables the quality of products to be stable and reliable and greatly reduces cost.

Description

technical field [0001] The invention relates to the processing technology of metal parts. Background technique [0002] The heat exchange system (triangular) steel structure is mostly used in cooling systems such as power plants, and the louvers (sheets) used in this structure are indispensable parts in the cooling system. It is made of steel plate of about 2mm, the length is usually about 2m, the width is generally about 220mm, and it is wavy. The cooling system of each power plant requires tens of thousands of pieces. Blinds (sheets) have high technical requirements and a large quantity requirement. It requires an angle error of 0.5mm and a flatness error of 2mm within 2m, which is a difficult point in the manufacturing process of the heat exchange system (triangular) steel structure. [0003] The manufacture of louvers (sheets) for heat exchange system (triangular) steel structure has a history of more than 50 years. A well-known foreign company has been using the tradit...

AI Technical Summary

Problems solved by technology

[0006] 2. Difficulty in making molds: With traditional manufacturing techniques, the louvers (sheets) are deformed after being pressed and formed, so the mold must have an anti-deformation allowance, and this allowance is obtained based on the experimental results

Therefore, the mold must be repaired after the mold is manufactured, and the technology of repairing the mold is complicated and the operation is difficult. If there is no experience, the mold may be scrapped after the mold is repaired.

[0007] 3. Unstable product quality: Since the material, thickness, and size of the blinds produced vary from batch to batch, and the mold is fixed, the product quality is always unstable, and it must be reshaped to ensure the quality

Dies are prone to wear and tear, resulting in unstable product dimensions

[0008] 4. High cost of materials: the shearing is carried out with plates of common sizes, with many spare parts and large loss