Office Chair Steel Plate Production

The production of steel plates for office chairs requires a combination of functional requirements and technological processes, with core steps including design, material selection, processing, and surface treatment. Here are the specific key points:

1. Hole Design and Functional Adaptation
The steel plate needs to have 16 holes reserved (10 if no armrests are required), with 10 used for fixing the seat and 6 for fixing the armrests on both sides. The hole layout should be designed according to the structural mechanics of the seat to ensure uniform force distribution and avoid deformation caused by local stress concentration. For example, the seat-fixing holes can be symmetrically distributed in the central area of the steel plate, while the armrest holes are located on both edges. The hole diameter should match the screw specifications, typically using M6 or M8 standard threaded holes, with a depth that allows the screws to be fully embedded without penetrating the steel plate.

2. Material Selection and Performance Requirements
High-quality carbon steel (such as Q235) or stainless steel (such as 304) should be preferred as raw materials. Carbon steel has lower costs and sufficient strength, making it suitable for general office environments; stainless steel offers better corrosion resistance and is suitable for humid or high-humidity scenarios. The recommended material thickness is 3-5mm; too thin and it is prone to deformation, while too thick increases weight and cost. Tensile tests should be conducted to verify the material's yield strength, ensuring that the load-bearing capacity meets the seat design standards (usually requiring the ability to withstand a static load of over 100kg).

3. Forming and Processing Techniques

• Stamping: Used for mass production of holes, requiring the design of dedicated molds to ensure hole spacing accuracy (error ≤ 0.1mm).
• Bending: If the steel plate needs to conform to the curvature of the seat, it should be processed using a bending machine, with angle errors controlled within ±1°.
• Cutting: Laser cutting or waterjet cutting should be used to ensure smooth edges without burrs, preventing scratches on the seat fabric.
• Welding: If the steel plate needs to be connected to other components (such as brackets), the welding method should be selected according to the characteristics of the steel. Carbon steel can be welded using arc welding, while stainless steel is recommended to be welded using argon arc welding to reduce oxidation.

4. Surface Treatment and Durability Enhancement

• Spraying: Epoxy resin powder spraying can form a coating thickness of 0.1-0.2mm, with a salt spray test resistance of over 500 hours.
• Electroplating: A zinc coating thickness of 8-12μm is recommended to provide basic rust resistance; for higher corrosion resistance, chrome plating (thickness 0.3-0.5μm) can be used.
• Passivation Treatment: The surface of stainless steel should undergo pickling and passivation to remove processing marks and form a dense oxide film, enhancing fingerprint and stain resistance.

5. Assembly and Testing
The steel plate is fixed to the seat using 6 screws, and 4 screws are used for assembling other components (such as caster brackets). The screws should be equipped with spring washers to prevent loosening, and the nut torque should be controlled within the range of 5-8N·m. After assembly, dynamic load testing should be conducted to simulate human sitting pressure for over 100,000 cycles, ensuring no cracking or deformation. The installation of casters should ensure smooth rotation without abnormal noise, with a sliding resistance of ≤5N.