Metal Deep Drawing Stamping Die, Head Drawing Deep Drawing Die

Residual stress is a core intrinsic factor restricting the structural stability, forming accuracy, and service life of stamping dies. Based on a scientific structural design logic, the generation of residual stress can be suppressed, dispersed, and avoided at its source. Residual stress control requires coordinated management across three dimensions: structural layout, material selection, and processing technology, forming a systematic avoidance plan.

The core of die structure layout design lies in balancing load transfer and preventing localized stress accumulation. The structural design should avoid sharp corners, right angles, and abrupt changes in cross-section, adopting a layout with smooth transitions and uniform wall thickness of equal strength to weaken stress concentration effects and prevent deformation, warping, or even cracking failure caused by stress imbalance during heat treatment, trial molding, and mass production.

Material selection must match the mechanical and thermal properties of the die's operating conditions, prioritizing die steels with uniform metallographic structure and high toughness and hardenability. The better the material's inherent structural stability, the lower the initiation and accumulation of internal stress during cutting and quenching, reducing the base for residual stress generation from the material itself.

Machining technology is a key aspect of controlling residual stress, and the machining process and heat treatment regime need to be optimized simultaneously. A reasonable arrangement of roughing and finishing steps, coupled with stress-relieving processes such as annealing and aging, can effectively eliminate machining hardening stress. Employing gradient cooling and segmented cooling methods can reduce the temperature gradient within the mold body, avoiding thermal residual stress induced by temperature differences.

In summary, through structural configuration optimization, appropriate material selection, and coordinated control of machining and heat treatment processes, residual stress risks in mold structural design can be systematically avoided, mold dimensional accuracy can be stabilized, and the overall service life can be extended.