Stamping Die For Automotive Seat Frame Tubes

Product Details:
Product Name: Stamping Die for Automotive Seat Frame Tubes
Parameters: Applicable tube diameter: Φ16–Φ32mm; wall thickness: 1.0–2.0mm; maximum necking rate: 30%; maximum piercing diameter: 12mm; die length: 1200mm; total weight: 1.5 tons; daily output: 5,000 pieces.
Material: The cam driver block is made of quenched Cr12MoV, with sliding surfaces inlaid with self-lubricating graphite-embedded copper plates. Punches are DC53. Die inserts and tube positioning blocks are made of SKD11 with TD treatment, achieving a surface hardness of 2800 HV. The die body is a welded structure.

Process: A tube is pushed into the positioning cavity by a pneumatic cylinder or spring. The first process is lateral necking, achieved by the synchronized advance of two cams. The second process is upward piercing, during which an internal mandrel supports the tube wall to prevent collapse. The mandrel's automatic insertion and retraction are linked to the cam motion. All moving components have a positive return mechanism. During die making, sliding mating surfaces are hand-scraped for smooth operation. A robotic arm loads and unloads tubes with a cycle time of 12 seconds per piece. All forming is completed in one cycle, guaranteeing positional accuracy within 0.3mm. Parts require no post-process correction and can go directly to robotic welding.