Aluminum Alloy Stamping parts

　　Aluminum Alloy Stamping Parts

　　What is Aluminum Alloy Stamping?

　　Aluminum Alloy Stamping is a precision forming process specifically designed for aluminum and aluminum alloy sheets. It processes aluminum alloy sheets into various structural and functional parts through customized molds and adaptive stamping equipment. Aluminum alloy possesses characteristics such as lightweight (density only 2.7g/cm³, about 1/3 of steel), good formability, natural corrosion resistance (forming an oxide film on the surface), excellent thermal and electrical conductivity, and medium strength (tensile strength 200-600MPa). The stamping process achieves integrated and efficient forming of parts, with core features of "triple balance of lightweight, high forming efficiency, and economy", making it suitable for mass production scenarios with comprehensive requirements on weight, cost, and forming complexity.

　　Compared with steel and titanium alloy stamping, its core difference lies in adapting to aluminum alloy's characteristics of "soft texture, easy forming but prone to sticking to molds, and medium strength". By optimizing mold anti-sticking design, stamping parameters, and post-processing processes, it maximizes the lightweight advantages of aluminum alloy while ensuring forming accuracy, and is one of the most widely used lightweight metal stamping solutions currently.

　　How It Works

　　The core of aluminum alloy stamping is "balancing efficient forming and performance retention". It adapts to the physical properties of aluminum alloy through process optimization, achieving a balance between mass production and quality stability. The key processes and control points are as follows:

　　Aluminum Alloy Sheet Preparation: Select corresponding series of aluminum alloy sheets (such as 5052, 6061) with a thickness of 0.3mm-10mm; pre-treatment includes oil-free surface cleaning (removal of oxide film and impurities) and precision leveling (flatness error ≤0.01mm/m). Choose cold-rolled or hot-rolled sheets according to part requirements (cold-rolled sheets have higher dimensional accuracy, suitable for precision parts).

　　Mold Adaptation and Anti-sticking Design: Molds are made of Cr12MoV hardened steel or cemented carbide, with surface nitriding or TiN coating treatment (hardness ≥HRC 60) to avoid sticking; the mold clearance is set to 1.1-1.2 times the material thickness (adapting to aluminum alloy ductility), and fillet design (R≥0.3mm) reduces stress concentration; the blank holder applies uniform pressure (0.3-2MPa) to prevent wrinkling.

　　Precision Stamping Forming: Select equipment (mechanical punch press, CNC punch press, hydraulic punch press) according to part complexity, and control the stamping speed (10-200 times/minute, adapting to aluminum alloy forming efficiency); simple parts adopt single-pass forming, while complex parts (deep drawing, multi-bending) adopt 2-4 stepwise forming passes. Low-temperature stress relief annealing (180-220℃) can be performed after each pass to avoid springback; use special aluminum alloy stamping lubricants to reduce mold wear and part scratches.

　　Post-processing and Inspection: Remove surface lubricant after forming, and perform surface treatment (anodizing, spraying, wire drawing, electrophoresis) according to requirements to enhance corrosion resistance and aesthetics; inspection items include dimensional tolerance (±0.02mm-±0.1mm), surface quality (Ra≤0.3μm, no scratches/burrs), mechanical properties (tensile strength, elongation), and corrosion resistance (salt spray test ≥96 hours without obvious corrosion).

　　Throughout the process, "efficient forming + anti-sticking and anti-scratching" is the core. By optimizing molds, selecting lubricants, and adjusting parameters, it solves the pain points of aluminum alloy stamping (ease of sticking to molds and springback), ensuring both part accuracy and mass production efficiency meet standards.

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