CN111791020A - Production method of double-sided color-coated high-quality cold-bending steel - Google Patents

Abstract

A production method of double-sided color-coated high-quality cold-bending section steel belongs to rolling and forming of steel cold-bending section steel, and is a production method which is formed by pre-customized high-quality and special color-coated steel plate coils, realizes surface coating protection and common cold-bending forming through a cold-bending rolling forming technology, and solves the main technical problem of how to develop and determine a novel section style of double-sided color-coated high-quality cold-bending section steel. The double-sided color-coated high-quality cold-formed steel has the advantages of bright surface color, attractive appearance and good corrosion resistance, can be widely used for manufacturing various guardrails and various decorative components, effectively improves the appearance effect of the whole component, and brings people with beautiful enjoyment.

Description

Production method of double-sided color-coated high-quality cold-bending steel

Technical Field

The invention relates to steel cold-formed steel, in particular to a production method of double-sided color-coated high-quality cold-formed steel.

Background

The cold-formed steel is a door steel product and is widely applied in real life, and the production process comprises the following steps: the plate is produced by a plate coil which is prepared in advance and has certain thickness and width through a continuous cold-bending rolling forming technology; according to different purposes, the cold-formed steel has a plurality of section shapes, and the common sections have the following shapes: the special-shaped section steel has a round shape and a square shape, the section shapes of the special-shaped section steel are formed by cold roll forming and on-line welding in a pre-designed roll-type system to form a closed section, and the special-shaped section steel with a more complex section is also used for certain structural requirements; the surface state of the existing cold-formed steel generally has two conditions: one is metal primary color, namely, no treatment is carried out, the product is easy to rust, the other is surface galvanizing treatment, the surface painting protection and beautification are carried out when the surface galvanizing treatment is used, particularly when the surface galvanizing treatment is used for guardrail manufacturing or decoration, and the rust removal treatment is carried out before painting in the former case; the painting process is generally manually operated or is carried out by a simple tool, so that the labor intensity is high, the working efficiency is low, the working environment is poor, the painting or spraying surface effect is poor, a paint film is easy to fall off, and the corrosion resistance is poor; thus, one problem of the cold-formed steel is exposed, and the cold-formed steel is subjected to surface treatment during use, which brings trouble to subsequent application;

to facilitate the understanding and examination of the present patent, a background art of color-coated steel coils is introduced; the color-coated steel plate coil is an industrial standard product produced by the procedures of pickling, galvanizing, color coating, drying, color coating again and the like of a cold-rolled plate coil, each procedure has certain technical requirements, the whole production process is clean and environment-friendly, the color-coated steel plate coil belongs to an environment-friendly green product, has excellent surface effect and high corrosion resistance, becomes a decorative material provided for the society by the steel industry, is widely applied to the industries of buildings, household appliances and transportation, and is mostly provided with workshops, warehouses, corrugated roofs, partition walls, rolling doors and the like in the building industry; the color-coated steel plate coil generally has the following specifications: the thickness of the plate roll is within 2mm, the width of the plate roll is mainly 1000mm and 1200mm, and the color of the plate roll is customized according to requirements; the using state of the color-coated steel plate coil generally takes a flat or wave-shaped simple section as a main part, and the forming mode is as follows: stamping forming and roll forming, wherein, stamping forming: the deformation is formed in one step, the shape of the cross section of the finished product is simple, the production efficiency is low, and the method is suitable for small-batch production; and (3) rolling and forming: the continuous rolling forming of multiple frames can be realized, the production efficiency is high, the shapes of the sections of products can be complex and various, but the products in the current market are only limited to a few simple sections of wave-shaped rolling door profiles and the like, particularly, the plate thickness is generally below 0.6mm, the bending resistance of the products is lower, the products are not suitable for being used as important components, and the application range is limited to a certain extent, so that the high-quality material of color-coated steel plate coils is not popularized and applied more widely; the color-coated steel plate coil related by the invention is based on the strength, corrosion resistance and surface brightness requirements of the use characteristics of cold-formed steel developed and designed by the invention, and when the color-coated steel plate coil is customized in advance, the color-coated steel plate coil is used for the corresponding indexes of the performance indexes: the thickness of the color-coated steel plate coil, the thickness of a coating film, the brightness of the coating film and the like put forward special requirements, namely the quality index of the color-coated steel plate coil selected by the invention is superior to that of the color-coated steel plate coil in general use.

Disclosure of Invention

How to solve the problem that the common cold-formed steel needs to be subjected to complicated surface treatment when in use, and provide high-quality cold-formed steel with diversified colors, which is a problem to be solved in the field of cold-formed steel, the patent fully utilizes the advantages of high quality and high corrosion resistance of the surface of a color-coated steel plate coil, and invents a production method for obtaining double-sided color-coated high-quality cold-formed steel with high-quality coating protection on the surface by directly performing cold-bending forming on the color-coated steel plate coil; the concrete method is as follows: by changing the process sequence, the method comprises the following steps: molding → painting, changing into: firstly color coating → reshaping, selecting a pre-customized color coated steel plate coil as a base material, and providing some special requirements when the color coated steel plate coil is customized, including: the surface quality of the customized color-coated steel plate coil is better than that of the common color-coated steel plate coil, the color of the double-side color coating of the customized color-coated steel plate coil can be the same or different, the customized color-coated steel plate coil is continuously molded by a plurality of racks through a strip dividing and cold-bending roll forming technology, and double-side color-coated high-quality cold-bent section steel with high-quality coating protection on the surface is directly provided for the market, so that the trouble of painting when a customer uses the customized color-coated steel plate coil is avoided;

because the section of the finished product of the double-sided color-coated high-quality cold-formed steel with the surface protected by the high-quality coating can not be welded, the section pattern of the finished product is different from the circular or square section pattern of the conventional section pattern, and a group of section patterns suitable for the characteristics of the double-sided color-coated cold-formed steel need to be additionally developed and designed; through full market research and technical characteristics of cold-bending forming process, the invention develops and designs various section styles suitable for the requirements of the invention, the specific section styles additionally report patents, and two suitable cold-bending section styles are successfully manufactured in a trial mode, wherein one is as follows: the double-sided color-coated cold-formed steel (novel) for the guard bar and the decoration is suitable for the internal connection of the guard bar and a decoration member, the outer surface of the section bar is smooth and does not prick hands, and the section bar is suitable for being held by hands, so that an appearance design patent is obtained; the second is that: the double-sided color-coated cold-bent steel (II) is suitable for manufacturing guardrail columns, can also be used for internal connection of decorative components and outer frame materials of general components, and has also obtained an appearance design patent; in view of the general thickness of the color coated steel plate coil selected by the invention: less than 2mm, so the double-sided color-coated high-quality cold-formed steel of the invention belongs to thin-walled cold-formed steel, the application range mainly meets the requirements of guardrails and decoration, and the application requirements of general purpose structural members are considered;

the invention adopts the method that the color coated steel plate coil is directly selected as the base material to be formed by cold-bending rolling and redesigning the novel section style of the cold-bent section steel, thereby achieving the following beneficial effects: (1) the production and subsequent use processes are green and pollution-free, the selected substrate color-coated steel plate coil is a green and large industrial standardized product, the forming process is continuous cold-bending roll-forming, the product belongs to a clean production type, the final application link only needs cutting, drilling and bolt connection, the painting process is omitted, and the whole process is green and pollution-free; (2) the novel cold-formed steel has good surface coating quality and bright color, provides fine steel products for the market, and can realize the diversification of the surface color of finished products by adjusting the color of a pre-customized color-coated steel plate coil; (3) the color coating of the color-coated steel plate coil has better quality than common paint brushing or spraying, the anti-corrosion performance and the anti-falling performance are greatly enhanced, and the service life is prolonged to more than 10 years; (4) the novel cold-formed steel has beautiful appearance, and the rigidity and the strength meet the use requirements; (5) novel cold-formed steel passes through bolt, auxiliary connection spare and connects the equipment, accomplishes processing such as cutting, drilling in advance at the mill, assembles at the scene, makes packaging efficiency improve, the time limit for a project shortens, installation cost reduces, again because of need not the welding, polish, is favorable to indoor construction environmental protection.

Claims (3)

1. A production method of double-sided color-coated high-quality cold-bending section steel is a production method which realizes surface coating protection and common cold-bending molding synthesis at one time by a pre-customized special color-coated steel plate coil through a cold-bending roll-forming technology; the method is characterized in that: from the original: firstly forming → then painting, changing into directly selecting and customizing the high-quality special color-coated steel plate coil with coating protection on the surface in advance, customizable color and luster types and plate thickness meeting the strength requirement of the section steel, then directly producing the finished product of the double-sided color-coated high-quality cold-formed steel with the high-quality coating protection on the surface by dividing the width of the plate coil and applying the cold-bending roll forming technology, wherein the key technology is to develop and design a group of cold-formed steel which meets the use function requirement, is suitable for cold-bending roll forming without damaging the integrity of the surface coating and has a novel section style.

2. As set forth in claim 1: cold-formed steel with novel section pattern has developed and has designed: guardrail and decoration are with two-sided colored cold-formed steel (novel), and its specific section pattern has obtained the design patent of outward appearance, patent number: ZL 201730426926.1.

3. As set forth in claim 1: cold-formed steel with novel section pattern has developed and has designed: the specific section style of the double-sided color-coated cold-rolled steel (II) is patented by appearance design, patent numbers: ZL 201730530516.1.