Office Chair Stamping Die

An office chair stamping die is a tool that uses a press to plastically deform or separate metal sheets to obtain specific shapes. It features high precision, high efficiency, and high material utilization, and is widely used in the manufacturing of key components for office chairs.

Technical Principles and Process Advantages

Stamping dies apply pressure to metal sheets using a press, causing plastic deformation or separation within the die cavity. Their core advantages are reflected in three aspects:

• High Precision and Consistency: Die guiding accuracy and gap control can reach ±0.01mm, ensuring minimal dimensional errors and strong interchangeability in mass production. For example, the gap between the punch and die for an office chair five-claw die must be strictly controlled at 8%-12% of the material thickness (e.g., 0.12-0.18mm for a 1.5mm steel sheet).
• High Efficiency: By using progressive or compound dies, multiple processes such as blanking, punching, and bending can be completed on a single press, with a production rhythm of 30-60 pieces per minute.
• High Material Utilization: Through reasonable nesting design (e.g., staggered nesting), material utilization can be increased from 50% in ordinary blanking to over 75%.

Typical Application Cases

• Office Chair Five-Star Base: A drawing die is used to deeply draw a 2mm thick SPCC steel sheet to a forming depth of 80mm. The die is equipped with a nitrogen spring ejection device to prevent scratches during demolding, integrating five traditionally welded components into a single forming. This increases structural strength by 30% and production efficiency by five times.
• Office Chair Five-Claw: The star-shaped structure (φ120-150mm) requires step-by-step stamping (punching first, then forming) to reduce stress concentration in the rounded transition areas of the claws. In mass production, the die life is approximately 500,000 cycles, requiring regular TD treatment (titanium carbide coating) to extend its service life.

Installation and Maintenance Points

• Pre-Installation Preparation: Check the die model for consistency with the drawings, clean oil stains, and apply anti-rust oil (e.g., ISO VG68 hydraulic oil); debug the press (rated pressure ≥200 tons, stroke rate ≥40 strokes per minute), and adjust the slide height to the die closing height +5mm.
• Trial Stamping and Debugging: Use a 1.2mm galvanized steel sheet for trial stamping, ensuring the bright band accounts for ≥60%; gradually adjust the closing height to a burr-free state, and control the stripper spring pressure at 15-20kgf/cm².
• Daily Maintenance: Clean waste and lubricate guide posts (molybdenum disulfide lithium grease) after each shift, and inspect punch wear (grinding required if exceeding 0.1mm) weekly.
• Safe Operation: Cut off the power and lock out during installation, and install a light curtain protection system (response time ≤20ms) in the stamping area.