Root Causes Loss Analysis and Standard Technical Transformation of Stamping Double-Sheet Feeding Mold Collision Accident

A1: Double-sheet feeding is highly accidental and easy to be ignored by human judgment. Long-shift fatigue, night-shift low attention, material adhesion, thin sheet overlapping and residual material sticking on the feeder will all cause undetected double-layer feeding. Manual inspection can only achieve sampling judgment, unable to monitor every stamping cycle. Once missed, high-pressure instantaneous stamping force directly impacts the mold, causing irreversible structural damage.

A2: Direct loss is mold repair and replacement cost. Indirect hidden losses are more serious: long-time production shutdown causing order delivery delay penalties, repeated precision calibration after mold deformation, batch dimensional deviation defects after mold accuracy drift, and reduced customer trust due to unstable production safety and quality. Many enterprises only count visible mold costs and ignore huge invisible delivery and quality losses.

A3: The system installs high-precision thickness sensing and laser detection modules at the feeding end. It compares real-time material thickness with standard single-sheet thickness data. Once overlapping sheets, foreign objects or ultra-thick materials are identified, the system immediately triggers alarm, automatically locks the press stamping action, and prohibits down-stroke execution. It realizes active interception before dangerous stamping action, completely different from passive manual inspection after feeding.

A4: High-value mold scenarios such as automotive structural parts, new energy hardware and precision electronic stamping must be fully equipped. Continuous automatic feeding lines, high-speed stamping lines and long unattended production cycles have the highest accident probability. For thick plate stamping with high tonnage presses, double-sheet stamping will cause more violent impact, so intelligent protection is a necessary safety threshold.

A5: Stamping safety management is transforming from post-accident maintenance to full-process active prevention. Traditional manual error prevention will be completely replaced by intelligent sensing interception. Anti double-sheet detection, foreign object protection and overload early warning will become standard safety configurations for automatic stamping lines. Intelligent safety protection will be included in customer factory audit indicators, becoming the basic guarantee for stable mass production.