Stamping Part Deep Drawing Analysis

Stamping part deep drawing is a complex forming process that transforms flat metal blanks into seamless, three-dimensional parts with deep cavities—such as cans, cups, automotive oil pans, or electronic housings. Unlike simple bending (which involves only angular deformation), deep drawing requires the material to undergo significant radial stretching and circumferential compression, making it prone to defects like wrinkling, tearing, or uneven wall thickness. A thorough deep drawing analysis is essential to optimize process parameters, tooling design, and material selection, ensuring successful production of high-quality deep-drawn parts.

Material selection is the first step in deep drawing analysis. The ideal material must have high ductility (to withstand stretching without tearing) and good drawability—measured by the Lankford coefficient (r-value), which indicates the material’s ability to stretch in the planar direction. Low-carbon steel (e.g., SAE 1010 with an r-value of 1.5–2.0) is commonly used for deep drawing, as it balances ductility and strength. Aluminum alloys (e.g., 5052-H34) are used for lightweight parts but require higher drawing forces due to lower ductility. The blank size is calculated based on the part’s final dimensions, using volume conservation principles to ensure the blank has enough material to form the cavity without thinning excessively.

Process parameters analyzed include drawing force, punch speed, and blank holder force (BHF). Drawing force must be sufficient to pull the blank into the die cavity but not so high that it tears the material; it is calculated based on material strength, blank size, and part geometry. Punch speed (typically 10–50 mm/s) affects deformation uniformity—too high a speed can cause localized heating and tearing, while too low reduces production efficiency. BHF is critical for preventing wrinkling: it applies pressure to the blank’s outer edge, controlling the flow of material into the die. Insufficient BHF leads to wrinkling, while excessive BHF increases friction and causes tearing. Tooling design is also analyzed: the die and punch radii must be smooth (minimum radius of 2t) to avoid scratching the material, and the die’s entry angle is optimized to reduce material flow resistance. By conducting a detailed deep drawing analysis, manufacturers minimize defects, improve part quality, and ensure efficient production.

Read recommendations:

Sealing ring Precision electronic parts

Housing components for recessed downlights Precision electronic parts

Oval Magnetic Hardware Precision electronic parts

CNC Machining Dimension Accuracy

CNC processing factory - Meeting customers' strict requirements for precision