Deep Drawing Stamping

Wrinkling is one of the most common forming defects in the deep draw stamping process. This defect manifests as buckling instability in the flange area of the blank when the circumferential compressive stress exerted on the material exceeds its ability to remain stable. As the punch presses down and pulls the flat blank radially into the deep draw stamping die cavity, the flange material flows inward while undergoing compressive stress perpendicular to the flow direction—when this stress exceeds the material’s buckling resistance, the flange loses stability and undergoes out-of-plane deformation. From a procurement perspective, wrinkling leads to higher scrap rates, increased costs for subsequent trimming and rework, and extended die trial cycles. To prevent wrinkling, it is necessary to systematically optimize the blank holder force (BHF), die entry radius, lubrication strategy, and material selection. Understanding the mechanical principles of wrinkling and the process parameters that control it is crucial for developing reliable custom deep draw stamping solutions, which ensure consistent

Deep draw stamping is a sheet metal forming process in which a punch applies compressive force to the center of a flat metal blank, generating tensile and compressive stresses as the material is drawn into the die cavity, thereby producing hollow, seamless parts. When the depth of the formed part exceeds its diameter or width, the process is formally classified as deep drawing. Unlike traditional stamping processes such as cutting, punching, or shallow bending, the deep draw stamping process induces significant radial and circumferential material flow, resulting in parts with uniform wall thickness and structural integrity—a level of quality that cannot be achieved through welding or assembly processes. Customized deep draw stamping can achieve production rates of 15 to 40 parts per minute on mechanical presses, supporting high-volume manufacturing projects with consistent dimensional accuracy and repeatability. The cold-forming nature of this process preserves the metal’s grain structure and increases tensile strength by 10% to 30% through work hardening, with the