钢结构构件生产工艺流程| K-HOME

How to Steel Structural Parts Production?

The production of steel structural components is a rigorous, systematic process. It typically begins with project preparation and raw material inspection, followed by layout and marking to establish dimensions. The components are then shaped through cutting, machining, assembly, and welding, and finally undergo anti-corrosion coating and factory inspection. Each stage is closely interlinked to ensure that the finished components meet design specifications and safety standards.

钢结构构件生产工艺流程

The safety and durability of 钢结构建筑物 depend on the manufacturing quality of each individual steel component. Any dimensional deviation or welding defect can compromise the safety of the entire structure.

Therefore, the production of steel components must strictly adhere to the building standards of the project location. Every step—from raw materials to the finished product—must be precisely controlled, with quality management integrated throughout the entire process to ensure defects are promptly eliminated.

Khome has established a rigorous quality management system; we oversee every stage of production with meticulous care to guarantee the quality of each component and ensure the safety of the entire building.

1. 来料检验

Before production begins, steel must be purchased from reputable mills. Upon arrival, it shall undergo strict inspection of chemical composition and mechanical properties (such as yield strength and tensile strength). Only materials that pass all tests are allowed to be accepted into inventory and put into use.

KHOME insists on long-term strategic cooperation with reputable steel mills. We also enforce incoming material inspection standards. These standards are even stricter than national requirements.

2. Stakeout

Stakeout: Draw full-scale (1:1) patterns on the layout table, verify drawing dimensions and hole spacings, making templates and sample rods for cutting, bending, milling, planing, hole making, etc., for subsequent processing.

3. Draw Lines

包括检查核对材料，在材料上标出下料、铣削、刨削、打孔等加工位置，打孔，标记零件编号等。材料确定应注意以下问题：

根据配料表和模板，对套件进行裁剪，尽可能节省材料。
要有利于切削加工，保证零件的质量。
当工艺有规定时，应按规定取材。

4. Blanking and Cutting

Materials are cut according to drawing specifications. Different cutting equipment is used for different needs. This ensures that all parts meet precise dimensional requirements.

Common cutting methods include the following:

Flame cutting. This is suitable for thick plates.
Plasma cutting. It offers fast speed and high precision.
Laser cutting. It provides the highest precision but comes at a higher cost.

After cutting, all slag and burrs must be removed. This step ensures clean and ready-to-use workpieces.

Cutting not only separates the basic profile of the part but often simultaneously machines the weld bevel, preparing it for subsequent assembly.

5. Hole Making and Edge Processing

Hole making and edge processing further define the connection characteristics of steel components.

High-strength bolted connections are a primary method for joining steel structures. So, the precision of bolt holes directly impacts installation quality. Utilizing CNC drilling machines or 3D drilling machines ensures positional accuracy across hole patterns.

Edge processing involves milling or grinding away any hardened layers or minor defects resulting from the cutting process, thereby ensuring the quality of welded joints.

6. Steel Structure Components Assembly

The assembly of steel structural components refers to the process of joining cut steel plates, profiles, and other parts—using tack welding or connecting elements—to form integral structural members (such as H-beams, columns, and girders).

Methods include ground sampling method, copy copy assembly method, vertical assembly method, tire mold assembly method, etc.

This process is carried out on specialized assembly platforms or jigs, utilizing positioning blocks, clamps, and measuring tools to ensure the precise relative positioning of the parts. At this stage, the steel components are secured only by temporary tack welds in preparation for final welding.

7。焊接

Welding is a critical process in the fabrication of steel structural components. It imparts the final structural integrity to the members. Commonly used methods include manual arc welding, gas-shielded welding, and submerged arc welding. Preheating is required before welding, and post-weld heat treatment is necessary to relieve stress;

At its core, welding involves the localized melting and re-solidification of metal; this process inevitably entails thermal expansion and contraction, leading to welding deformation. Controlling deformation is the primary task at this stage, and methods such as symmetrical welding sequences, pre-setting for reverse deformation, and rigid fixturing are used to keep deformation within permissible limits.

8. Straightening

Post-welding straightening is essential. Any bending or distortion resulting from the welding process is corrected using mechanical methods (such as a hydraulic press) or localized flame heating.

Following straightening, key dimensions must be re-verified, and the welds subjected to visual inspection and non-destructive testing (such as ultrasonic and magnetic particle testing) in accordance with specifications to confirm that both internal quality and external profile meet the required standards.

9. Treatment Of The Friction Surface

Shot blasting of steel components is a surface treatment process primarily used to remove impurities—such as mill scale, rust, and welding slag—from the surface, while simultaneously increasing surface roughness to enhance the adhesion of subsequent coatings.

Surface pretreatment: Abrasive blasting to Sa 2.5 grade (anchor profile depth of 40–80 μm), with additional grinding within 20 mm of welded areas.

10.涂层

After undergoing final dimensional and shape inspections, the steel components proceed to the coating stage.

Coating is not merely a simple matter of applying paint; it is a systematic protective process.

The process begins with a secondary surface cleaning of the steel components, followed by the application of an anti-rust primer.

Primers are typically zinc-rich or based on an epoxy zinc-rich system, preventing corrosion of the substrate through cathodic protection or a barrier effect. An intermediate coat increases the total coating thickness and enhances the barrier effect, while the topcoat provides weather resistance and the desired color.